/* Source: css/global.css */
/* ============================================
   PercentagePro - Global Styles
   Modern, responsive design system
   ============================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors - Primary Palette (Professional Blue from Logo) */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #60a5fa;

    /* Colors - Accent (Vibrant Red from "free" Logo Text) */
    --color-accent: #dc2626;
    --color-accent-dark: #b91c1c;
    --color-accent-light: #ef4444;

    /* Colors - Action (Orange for Energy & Engagement) */
    --color-action: #f97316;
    --color-action-dark: #ea580c;
    --color-action-light: #fb923c;

    /* Colors - Semantic */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Colors - Neutrals (Warmer tones for friendlier feel) */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Gradients for Visual Interest */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #dc2626 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
    --gradient-hero: linear-gradient(135deg, #1e40af 0%, #1e293b 100%);
    --gradient-warm: linear-gradient(135deg, #f97316 0%, #fb923c 100%);

    /* Typography */
    --font-heading: 'Poppins', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Roboto Mono', 'SF Mono', Monaco, monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    /* 12px */
    --text-sm: 0.875rem;
    /* 14px */
    --text-base: 1rem;
    /* 16px */
    --text-lg: 1.125rem;
    /* 18px */
    --text-xl: 1.25rem;
    /* 20px */
    --text-2xl: 1.5rem;
    /* 24px */
    --text-3xl: 1.875rem;
    /* 30px */
    --text-4xl: 2.25rem;
    /* 36px */
    --text-5xl: 3rem;
    /* 48px */

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Spacing Scale */
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.25rem;
    /* 20px */
    --space-6: 1.5rem;
    /* 24px */
    --space-8: 2rem;
    /* 32px */
    --space-10: 2.5rem;
    /* 40px */
    --space-12: 3rem;
    /* 48px */
    --space-16: 4rem;
    /* 64px */
    --space-20: 5rem;
    /* 80px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows (Enhanced for depth) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-colored: 0 10px 20px -5px rgba(139, 92, 246, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;

    /* Z-index Scale */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1100;
    --z-modal: 1200;
    --z-tooltip: 1300;

    /* Container */
    --container-max-width: 1280px;
    --container-padding: var(--space-4);
}

.step-formula {
    display: block;
    background: var(--color-gray-100);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    margin-top: var(--space-2);
    font-family: var(--font-mono);
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
    font-weight: 600;
}

[data-theme="dark"] .step-formula {
    background: var(--color-gray-800);
    color: var(--color-primary-light);
}

@media (max-width: 480px) {
    :root {
        --container-padding: 12px;
    }
}

/* ============================================
   Dark Mode Theme
   ============================================ */
[data-theme="dark"] {
    --color-gray-50: #020617;
    /* Ultra dark background */
    --color-gray-100: #0f172a;
    /* Default background */
    --color-gray-200: #1e293b;
    /* Card background / Borders */
    --color-gray-300: #334155;
    /* Subtle borders */
    --color-gray-400: #475569;
    /* Muted text */
    --color-gray-500: #94a3b8;
    /* Regular slate text */
    --color-gray-600: #cbd5e1;
    /* Bright text */
    --color-gray-700: #e2e8f0;
    /* Very bright text */
    --color-gray-800: #f8fafc;
    /* Near white (Bold text) */
    --color-gray-900: #ffffff;
    /* Pure white (Headings) */

    /* Adjusted primary for dark mode */
    --color-primary: #60a5fa;
    --color-primary-dark: #93c5fd;
    --color-primary-light: #93c5fd;

    /* Adjusted semantic colors */
    --color-success: #34d399;
    --color-warning: #fbbf24;
    --color-error: #f87171;
    --color-info: #60a5fa;

    /* Dark mode gradients */
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --gradient-primary: linear-gradient(135deg, #60a5fa 0%, #f87171 100%);
}

/* Body and base */
[data-theme="dark"] body {
    background-color: #0f172a;
    color: #e2e8f0;
}

/* Headings */
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: #f8fafc;
}

/* Links */
[data-theme="dark"] a {
    color: #a78bfa;
}

[data-theme="dark"] a:hover {
    color: #c4b5fd;
}

/* Cards and containers */
[data-theme="dark"] .card,
[data-theme="dark"] .calculator-card,
[data-theme="dark"] .calculator-container,
[data-theme="dark"] .category-card,
[data-theme="dark"] .feature-card,
[data-theme="dark"] .info-card,
[data-theme="dark"] .formula-box,
[data-theme="dark"] .step-box,
[data-theme="dark"] .steps-container {
    background: #1e293b;
    border-color: #334155;
    color: #e2e8f0;
}

/* Form inputs */
[data-theme="dark"] .form-input,
[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: #334155;
    border-color: #475569;
    color: #f8fafc;
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: #94a3b8;
}

/* Labels */
[data-theme="dark"] label,
[data-theme="dark"] .form-label {
    color: #e2e8f0;
}

/* Result section */
[data-theme="dark"] .result-section {
    background: linear-gradient(135deg, #1e3a5f 0%, #1e293b 100%);
    border-color: #3b82f6;
}

[data-theme="dark"] .result-value {
    color: #60a5fa;
}

[data-theme="dark"] .result-explanation,
[data-theme="dark"] .result-label {
    color: #cbd5e1;
}

/* Sidebar */
[data-theme="dark"] .calculator-sidebar,
[data-theme="dark"] .sidebar-widget {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .sidebar-title {
    color: #f8fafc;
}

[data-theme="dark"] .sidebar-links a {
    color: #cbd5e1;
}

[data-theme="dark"] .sidebar-links a:hover {
    color: #a78bfa;
    background: #334155;
}

/* Header */
[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.9);
    border-color: rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--color-accent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

[data-theme="dark"] .nav-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-primary-light);
}

[data-theme="dark"] .nav-link,
[data-theme="dark"] .mobile-nav-link {
    color: #e2e8f0;
}

[data-theme="dark"] .nav-link:hover {
    color: #a78bfa;
}

/* Touch Targets for Mobile Nav */
.mobile-nav-link {
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 12px var(--container-padding);
}

[data-theme="dark"] .logo-brand {
    color: #f8fafc;
}

/* Footer */
[data-theme="dark"] .site-footer {
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
}

[data-theme="dark"] .footer-section h3 {
    color: var(--color-gray-900);
}

[data-theme="dark"] .footer-section p {
    color: var(--color-gray-600);
}

[data-theme="dark"] .footer-links a {
    color: var(--color-gray-500);
}

[data-theme="dark"] .footer-links a:hover {
    color: var(--color-primary);
}

[data-theme="dark"] .footer-bottom {
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-500);
}

[data-theme="dark"] .footer-bottom a {
    color: var(--color-gray-600);
}

/* Breadcrumbs */
[data-theme="dark"] .breadcrumb {
    color: #cbd5e1;
}

[data-theme="dark"] .breadcrumb a {
    color: #a78bfa;
}

/* Buttons */
[data-theme="dark"] .btn-reset,
[data-theme="dark"] .btn-secondary {
    background: #334155;
    color: #f8fafc;
    border-color: #475569;
}

[data-theme="dark"] .btn-primary,
[data-theme="dark"] .btn-action,
[data-theme="dark"] .btn-accent {
    color: var(--color-gray-900);
}

[data-theme="dark"] .btn-reset:hover,
[data-theme="dark"] .btn-secondary:hover {
    background: #475569;
    color: #f8fafc;
}

/* Copy button */
[data-theme="dark"] .copy-result-btn {
    background: #334155 !important;
    border-color: #475569 !important;
    color: #e2e8f0 !important;
}

[data-theme="dark"] .copy-result-btn:hover {
    background: #475569 !important;
}

/* Formula boxes */
[data-theme="dark"] .formula-title {
    color: #a78bfa;
}

[data-theme="dark"] .formula-expression {
    background: #0f172a;
    color: #34d399;
    border-color: #334155;
}

[data-theme="dark"] .formula-variables,
[data-theme="dark"] .formula-variable {
    color: #cbd5e1;
}

[data-theme="dark"] .variable-symbol {
    color: #fbbf24;
}

/* Muted text */
[data-theme="dark"] .text-muted {
    color: #cbd5e1;
}

/* Code */
[data-theme="dark"] code {
    background: #334155;
    color: #a78bfa;
}

/* Tables */
[data-theme="dark"] table,
[data-theme="dark"] th,
[data-theme="dark"] td {
    border-color: #334155;
}

[data-theme="dark"] th {
    background: #1e293b;
    color: #f8fafc;
}

[data-theme="dark"] td {
    color: #e2e8f0;
}

/* Alerts */
[data-theme="dark"] .alert-info {
    background: #1e3a5f;
    border-color: #3b82f6;
    color: #bfdbfe;
}

[data-theme="dark"] .alert-success {
    background: #14532d;
    border-color: #22c55e;
    color: #bbf7d0;
}

[data-theme="dark"] .alert-warning {
    background: #422006;
    border-color: #f59e0b;
    color: #fef08a;
}

[data-theme="dark"] .alert-error {
    background: #450a0a;
    border-color: #ef4444;
    color: #fecaca;
}

/* Calculator message */
[data-theme="dark"] .calculator-message {
    background: #1e293b !important;
    border-color: #475569 !important;
}

/* Trust bar */
[data-theme="dark"] .trust-bar {
    background: #1e293b;
}

[data-theme="dark"] .trust-item {
    color: #e2e8f0;
}

/* Stats section */
[data-theme="dark"] .stats-section {
    background: #0f172a;
}

[data-theme="dark"] .stat-card {
    background: #1e293b;
    color: #f8fafc;
}

/* Education section */
[data-theme="dark"] .education {
    background: #1e293b;
}

[data-theme="dark"] .education-content {
    color: #e2e8f0;
}

/* Hero section */
[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

[data-theme="dark"] .main-calculator {
    background: #1e293b;
    border-color: #334155;
}

/* Dark Mode Toggle Button */
.dark-mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--color-gray-800);
    color: var(--color-gray-100);
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: var(--z-sticky);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .dark-mode-toggle {
    background: #334155;
    color: #fbbf24;
    border: 1px solid #475569;
}

/* Dropdown menus */
[data-theme="dark"] .dropdown-menu {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .dropdown-item {
    color: #e2e8f0;
}

[data-theme="dark"] .dropdown-item:hover {
    background: #334155;
    color: #a78bfa;
}

/* Mobile nav */
[data-theme="dark"] .mobile-nav {
    background: #0f172a;
}

[data-theme="dark"] .mobile-dropdown-content {
    background: #1e293b;
}

/* ============================================
   Dark Mode - Calculator Specific Elements
   ============================================ */

/* Tips box */
[data-theme="dark"] .tips-box {
    background: linear-gradient(135deg, #422006 0%, #451a03 100%);
    border-color: #f59e0b;
    color: #fcd34d;
}

[data-theme="dark"] .tips-box h3 {
    color: #fbbf24;
}

[data-theme="dark"] .tips-box li,
[data-theme="dark"] .tips-box p {
    color: #fde68a;
}

/* Worked example */
[data-theme="dark"] .worked-example {
    background: linear-gradient(135deg, #1e3a5f 0%, #172554 100%);
    border-color: #3b82f6;
}

[data-theme="dark"] .worked-example h4 {
    color: #60a5fa;
}

[data-theme="dark"] .example-given {
    background: #0f172a;
    color: #e2e8f0;
    border-color: #334155;
}

[data-theme="dark"] .example-step {
    background: #1e293b;
    color: #e2e8f0;
    border-color: #3b82f6;
}

[data-theme="dark"] .example-answer {
    background: #3b82f6;
    color: #ffffff;
}

/* Step items */
[data-theme="dark"] .step-item {
    background: #1e293b;
    border-color: #a78bfa;
    color: #e2e8f0;
}

[data-theme="dark"] .step-content {
    color: #e2e8f0;
}

[data-theme="dark"] .steps-section {
    background: #0f172a;
}

/* Education blocks */
[data-theme="dark"] .education-block {
    background: #1e293b;
    border-color: #334155;
    color: #e2e8f0;
}

[data-theme="dark"] .education-block h3 {
    color: #a78bfa;
}

[data-theme="dark"] .education-section {
    border-color: #334155;
}

/* Related calculators */
[data-theme="dark"] .related-calculators {
    background: #0f172a;
}

[data-theme="dark"] .related-card {
    background: #1e293b;
    border-color: #334155;
    color: #e2e8f0;
}

[data-theme="dark"] .related-card:hover {
    border-color: #a78bfa;
}

[data-theme="dark"] .related-info h4 {
    color: #f8fafc;
}

[data-theme="dark"] .related-info p {
    color: #cbd5e1;
}

/* Calculator form */
[data-theme="dark"] .calculator-form {
    background: #0f172a;
}

[data-theme="dark"] .input-addon {
    background: #1e293b;
    border-color: #475569;
    color: #e2e8f0;
}

/* Use cases */
[data-theme="dark"] .use-cases {
    background: #1e293b;
    color: #e2e8f0;
}

[data-theme="dark"] .use-cases li {
    color: #cbd5e1;
}

/* Calculator description */
[data-theme="dark"] .calculator-description {
    color: #cbd5e1;
}

/* Paragraphs in cards */
[data-theme="dark"] .card p,
[data-theme="dark"] .calculator-container p {
    color: #cbd5e1;
}

/* Lists in dark mode */
[data-theme="dark"] li {
    color: #cbd5e1;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-gray-700);
    background-color: var(--color-gray-50);
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    /* 32px - 48px */
    font-weight: 700;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    /* 24px - 36px */
    font-weight: 600;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.875rem);
    /* 20px - 30px */
    font-weight: 600;
}

h4 {
    font-size: var(--text-xl);
    font-weight: 600;
}

h5 {
    font-size: var(--text-lg);
    font-weight: 600;
}

h6 {
    font-size: var(--text-base);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

ul,
ol {
    margin-left: var(--space-6);
    margin-bottom: var(--space-4);
}

li {
    margin-bottom: var(--space-2);
}

strong {
    font-weight: var(--font-semibold);
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: var(--color-gray-100);
    padding: 0.125rem 0.25rem;
    border-radius: var(--radius-sm);
    color: var(--color-primary-dark);
}

/* ============================================
   Utility Classes
   ============================================ */

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-3);
        /* Reduced from space-4 (1rem) on mobile */
    }
}

/* Text Utilities */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-primary {
    color: var(--color-primary);
}

.text-accent {
    color: var(--color-accent);
}

.text-success {
    color: var(--color-success);
}

.text-warning {
    color: var(--color-warning);
}

.text-error {
    color: var(--color-error);
}

.text-muted {
    color: var(--color-gray-500);
}

.font-bold {
    font-weight: var(--font-bold);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-medium {
    font-weight: var(--font-medium);
}

/* Spacing Utilities */
.mt-1 {
    margin-top: var(--space-1);
}

.mt-2 {
    margin-top: var(--space-2);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-6 {
    margin-top: var(--space-6);
}

.mt-8 {
    margin-top: var(--space-8);
}

.mb-1 {
    margin-bottom: var(--space-1);
}

.mb-2 {
    margin-bottom: var(--space-2);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.py-4 {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.py-6 {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
}

.py-8 {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
}

.px-4 {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.px-6 {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

/* Display Utilities */
.hidden {
    display: none;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

.grid {
    display: grid;
}

/* Flex Utilities */
.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-start {
    justify-content: flex-start;
}

.justify-end {
    justify-content: flex-end;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

/* Grid Utilities */
.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Card Component */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    padding: var(--space-6);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Button Base Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    /* Increased for better touch targets */
    min-height: 48px;
    /* WCAG AAA touch target */
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    border: none;
    border-radius: var(--radius-lg);
    /* More rounded for modern feel */
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: white;
    text-decoration: none;
}

/* Action Button - Orange for Maximum Engagement! */
.btn-action {
    background: linear-gradient(135deg, var(--color-action) 0%, var(--color-action-dark) 100%);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 14px 0 rgba(249, 115, 22, 0.39);
}

.btn-action:hover {
    background: linear-gradient(135deg, var(--color-action-dark) 0%, var(--color-action) 100%);
    color: white;
    text-decoration: none;
    box-shadow: 0 6px 20px 0 rgba(249, 115, 22, 0.5);
}

.btn-accent {
    background: var(--color-accent);
    color: white;
}

.btn-accent:hover {
    background: var(--color-accent-dark);
    color: white;
    text-decoration: none;
}

.btn-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-800);
}

.btn-secondary:hover {
    background: var(--color-gray-300);
    color: var(--color-gray-900);
    text-decoration: none;
}

.btn-lg {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-lg);
    min-height: 56px;
}

/* Alert Boxes */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border-left: 4px solid;
}

.alert-info {
    background-color: #dbeafe;
    border-color: var(--color-info);
    color: #1e40af;
}

.alert-success {
    background-color: #d1fae5;
    border-color: var(--color-success);
    color: #065f46;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: var(--color-warning);
    color: #92400e;
}

.alert-error {
    background-color: #fee2e2;
    border-color: var(--color-error);
    color: #991b1b;
}

/* Badge */
.badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: white;
}

/* Responsive Design */
@media (min-width: 640px) {
    :root {
        --container-padding: var(--space-6);
    }

    h1 {
        font-size: var(--text-5xl);
    }

    .sm\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sm\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sm\:text-lg {
        font-size: var(--text-lg);
    }
}

@media (min-width: 768px) {
    :root {
        --container-padding: var(--space-8);
    }

    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .md\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .md\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .md\:flex-row {
        flex-direction: row;
    }

    .md\:text-left {
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* Focus States for Accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Smooth Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-base);
}

.slide-down {
    animation: slideDown var(--transition-base);
}

/* ============================================
   PWA Install Banner
   ============================================ */

.pwa-install-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
    color: white;
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideDownBanner 0.4s ease-out;
}

@keyframes slideDownBanner {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.pwa-banner-content {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.pwa-banner-icon {
    font-size: 1.75rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.pwa-banner-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.pwa-banner-text strong {
    font-size: var(--text-base);
    font-weight: 600;
}

.pwa-banner-text span {
    font-size: var(--text-sm);
    opacity: 0.9;
}

.pwa-banner-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.pwa-install-btn {
    background: white;
    color: #2563eb;
    border: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pwa-install-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.pwa-dismiss-btn {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--space-2);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.pwa-dismiss-btn:hover {
    opacity: 1;
}

/* Mobile responsive */
@media (max-width: 480px) {
    .pwa-install-banner {
        flex-direction: column;
        gap: var(--space-3);
        padding: var(--space-4);
    }

    .pwa-banner-content {
        width: 100%;
    }

    .pwa-banner-actions {
        width: 100%;
        justify-content: space-between;
    }

    .pwa-install-btn {
        flex: 1;
    }
}

/* Dark mode */
[data-theme="dark"] .pwa-install-banner {
    background: linear-gradient(135deg, #1e40af 0%, #4338ca 100%);
}

[data-theme="dark"] .pwa-install-btn {
    background: #f8fafc;
    color: #1e40af;
}

/* ============================================
   Cookie Consent Banner
   ============================================ */

.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #f8fafc;
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-4);
    z-index: var(--z-modal);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cookie-consent-content {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    max-width: 1200px;
    width: 100%;
}

.cookie-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.cookie-text {
    flex: 1;
    min-width: 250px;
}

.cookie-text p {
    margin: 0;
    font-size: var(--text-sm);
    line-height: 1.5;
    color: #cbd5e1;
}

.cookie-actions {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    flex-shrink: 0;
}

.cookie-btn {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.cookie-accept {
    background: var(--color-primary);
    color: #ffffff;
}

.cookie-accept:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.cookie-decline {
    background: transparent;
    color: #94a3b8;
    border: 1px solid #475569;
}

.cookie-decline:hover {
    background: #334155;
    color: #f8fafc;
}

.cookie-learn-more {
    color: #60a5fa;
    font-size: var(--text-sm);
    text-decoration: underline;
}

.cookie-learn-more:hover {
    color: #93c5fd;
}

/* Mobile responsive */
@media (max-width: 640px) {
    .cookie-consent {
        padding: var(--space-4);
        flex-direction: column;
    }

    .cookie-consent-content {
        flex-direction: column;
        text-align: center;
    }

    .cookie-actions {
        width: 100%;
        justify-content: center;
    }

    .cookie-btn {
        flex: 1;
    }
}

/* Light mode override (if needed) */
[data-theme="light"] .cookie-consent {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

/* ============================================
   Accessibility Enhancements
   ============================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.18);
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Source: css/layout.css */
/* ============================================
   PercentagePro - Layout Styles
   Header, Footer, Navigation
   ============================================ */

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 3px solid var(--color-accent);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--container-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
    gap: var(--space-8);
}

/* Mobile: Reduce header padding to save vertical space */
@media (max-width: 480px) {
    .header-container {
        padding: var(--space-2) var(--container-padding);
        gap: var(--space-4);
    }
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.search-toggle {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 1rem;
    color: var(--color-gray-600);
    padding: 0;
}

.search-toggle:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

[data-theme="dark"] .sidebar-widget h3 {
    color: #f8fafc;
    border-bottom: 2px solid #334155;
}

[data-theme="dark"] .calculator-link {
    color: #cbd5e1;
}

[data-theme="dark"] .calculator-link:hover {
    color: #60a5fa;
    background: #1e293b;
}

[data-theme="dark"] .search-toggle {
    background: #1e293b;
    color: #cbd5e1;
}

[data-theme="dark"] .search-toggle:hover {
    background: var(--color-primary);
    color: white;
}

/* Logo/Brand - Enhanced Design */
.site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.site-logo:hover {
    transform: scale(1.08) rotate(-1deg);
}

.logo-img {
    height: 70px;
    width: auto;
    display: block;
    object-fit: contain;
    transition: all var(--transition-base);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.15));
}

[data-theme="dark"] .logo-img {
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.2)) brightness(1.2);
    /* mix-blend-mode: screen removed to rely on clean transparent PNG */
}

/* Theme-specific visibility - high specificity to ensure reliable swapping */
/* Default (Light) Mode */
.logo-light {
    display: block !important;
}

.logo-dark {
    display: none !important;
}

/* Dark Mode Overrides */
[data-theme="dark"] .logo-light {
    display: none !important;
}

[data-theme="dark"] .logo-dark {
    display: block !important;
}

@media (max-width: 767px) {
    .footer-grid {
        gap: var(--space-8);
    }
}

@media (max-width: 767px) {
    .mobile-nav {
        height: 50px;
    }
}

@media (max-width: 767px) {
    .logo-img {
        height: 50px;
    }
}

.logo-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-bold);
    text-shadow: 0 44px 12px rgba(139, 92, 246, 0.2);
    animation: gradientShift 3s ease infinite;
    display: inline-flex;
    align-items: center;
    margin-top: 2px;
    /* Slight adjustment to center the character glyph */
}

@keyframes gradientShift {

    0%,
    100% {
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
        -webkit-background-clip: text;
        background-clip: text;
    }

    50% {
        background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
        -webkit-background-clip: text;
        background-clip: text;
    }
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-brand {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(0.875rem, 2.5vw, 1.125rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo-tagline {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-gray-600);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

@media (max-width: 767px) {
    .logo-tagline {
        display: none;
    }

    .logo-brand {
        font-size: 0.875rem;
    }

    .logo-icon {
        font-size: 2rem;
    }
}

/* Main Navigation */
.main-nav {
    display: none;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    gap: var(--space-2);
    align-items: center;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    padding: var(--space-2) var(--space-5);
    color: var(--color-gray-700);
    font-weight: 600;
    border-radius: 99px;
    transition: all var(--transition-base);
    font-size: 0.95rem;
}

[data-theme="dark"] .nav-link {
    color: #cbd5e1;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    color: #60a5fa;
    background: rgba(255, 255, 255, 0.05);
}

.nav-link:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
    text-decoration: none;
}

.nav-link.active {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

/* Invisible hover bridge to prevent flickering when moving to dropdown */
.nav-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 16px;
    /* Bridge the gap between trigger and dropdown */
    background: transparent;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    cursor: pointer;
}

.dropdown-toggle::after {
    content: '\25be';
    font-size: 0.8em;
    margin-left: 4px;
    transition: transform var(--transition-base);
}

.nav-dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-2);
    padding: var(--space-2);
    display: none;
    z-index: var(--z-dropdown);
}

.nav-dropdown:hover .dropdown-menu {
    display: block;
    animation: slideDown var(--transition-base);
}

.dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-gray-700);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
    text-decoration: none;
}

/* ============================================
   MEGA MENU STYLES (Desktop Only)
   ============================================ */

/* Mega Menu Container - Desktop */
@media (min-width: 900px) {
    .dropdown-menu.mega-menu {
        min-width: 720px;
        /* Align to right edge of Calculators link to prevent overflow */
        left: auto;
        right: 0;
        transform: none;
        padding: 1.5rem;
        padding-top: 1.75rem;
        /* Extra top padding to account for arrow */
        border: 1px solid var(--color-gray-200);
        border-radius: 12px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.08);
        margin-top: 0;
        /* No gap - prevents flickering */
    }

    /* Visual anchor arrow pointing to parent menu */
    .dropdown-menu.mega-menu::before {
        content: '';
        position: absolute;
        top: -8px;
        /* Position arrow near right side to align with Calculators link */
        right: 50px;
        left: auto;
        transform: none;
        border: 8px solid transparent;
        border-bottom-color: white;
        filter: drop-shadow(0 -2px 2px rgba(0, 0, 0, 0.06));
    }

    /* Invisible bridge to prevent hover gap flickering */
    .dropdown-menu.mega-menu::after {
        content: '';
        position: absolute;
        top: -20px;
        /* Extends above the menu to bridge the gap */
        left: 0;
        right: 0;
        height: 20px;
        background: transparent;
    }

    .mega-menu-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }

    .mega-menu-item {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        padding: 0.875rem 1rem;
        border-radius: 10px;
        transition: all 0.2s ease;
        text-decoration: none;
        color: var(--color-gray-700);
    }

    .mega-menu-item:hover {
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
        color: var(--color-primary);
        text-decoration: none;
        transform: translateX(4px);
    }

    /* Focus state for keyboard accessibility */
    .mega-menu-item:focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: 2px;
        background: rgba(37, 99, 235, 0.05);
    }

    .mega-menu-icon {
        font-size: 1.25rem;
        flex-shrink: 0;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-50) 100%);
        border-radius: 10px;
        transition: all 0.2s ease;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    }

    .mega-menu-item:hover .mega-menu-icon {
        background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
        color: white;
        transform: scale(1.1) rotate(-3deg);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

    .mega-menu-title {
        font-weight: 600;
        font-size: 0.95rem;
        line-height: 1.3;
    }
}

/* Dark mode mega menu */
[data-theme="dark"] .dropdown-menu.mega-menu {
    background: #1e293b;
    border-color: #334155;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 8px 16px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .dropdown-menu.mega-menu::before {
    border-bottom-color: #1e293b;
}

[data-theme="dark"] .mega-menu-item {
    color: #e2e8f0;
}

[data-theme="dark"] .mega-menu-item:hover {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.15) 0%, rgba(167, 139, 250, 0.15) 100%);
    color: #a78bfa;
}

[data-theme="dark"] .mega-menu-item:focus-visible {
    outline-color: #60a5fa;
    background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .mega-menu-icon {
    background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .mega-menu-item:hover .mega-menu-icon {
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    color: #0f172a;
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.4);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: calc(var(--z-sticky) + 1);
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover span {
    background: var(--color-primary);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

/* Mobile Menu */
.mobile-nav {
    display: block;
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 350px;
    height: 100vh;
    background: white;
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-slow);
    z-index: var(--z-sticky);
    overflow-y: auto;
    padding: var(--space-20) var(--space-6) var(--space-6);
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-list {
    list-style: none;
    margin: 0;
}

.mobile-nav-item {
    margin: 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-4);
    color: var(--color-gray-700);
    font-weight: var(--font-medium);
    font-size: var(--text-lg);
}

.mobile-nav-link:hover {
    color: var(--color-primary);
    background: var(--color-gray-50);
    text-decoration: none;
}

.mobile-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    padding: var(--space-4);
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    cursor: pointer;
    text-align: left;
}

.mobile-dropdown-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
    background: var(--color-gray-50);
}

.mobile-dropdown-content.active {
    max-height: 500px;
}

.mobile-dropdown-link {
    display: block;
    padding: var(--space-3) var(--space-6);
    color: var(--color-gray-600);
    font-size: var(--text-base);
}

.mobile-dropdown-link:hover {
    color: var(--color-primary);
    text-decoration: none;
}

/* Overlay for Mobile Menu */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-sticky) - 1);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--space-12) 0 var(--space-6);
    margin-top: var(--space-16);
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-section h3 {
    color: white;
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
}

.footer-section p {
    color: var(--color-gray-300);
    line-height: 1.8;
}

.footer-links {
    list-style: none;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--space-6);
    text-align: center;
    color: var(--color-gray-400);
    font-size: var(--text-sm);
}

.footer-bottom p {
    margin-bottom: var(--space-2);
}

.footer-bottom a {
    color: var(--color-gray-400);
}

.footer-bottom a:hover {
    color: var(--color-primary-light);
}

/* Enhanced Footer Styles */
.footer-grid-enhanced {
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .footer-grid-enhanced {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .footer-grid-enhanced {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid-enhanced {
        grid-template-columns: 1.5fr repeat(5, 1fr);
    }
}

.footer-about {
    grid-column: 1 / -1;
}

@media (min-width: 1024px) {
    .footer-about {
        grid-column: 1 / 2;
    }
}

/*Footer CTA Section */
.footer-cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    margin: var(--space-8) 0;
    text-align: center;
}

.footer-cta-content h3 {
    color: white;
    font-size: var(--text-2xl);
    margin-bottom: var(--space-3);
}

.footer-cta-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: var(--text-base);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.footer-cta-content em {
    color: white;
    font-weight: var(--font-semibold);
    font-style: normal;
}

/* ============================================
   ADSENSE CONTAINERS
   ============================================ */

.ad-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: var(--space-8) 0;
    padding: var(--space-4);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    min-height: 100px;
}

.ad-container.ad-top {
    margin-top: var(--space-4);
}

.ad-container.ad-bottom {
    margin-bottom: var(--space-4);
}

.ad-placeholder {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
    text-align: center;
    font-style: italic;
}

/* ============================================
   MAIN CONTENT LAYOUT
   ============================================ */

.main-content {
    min-height: calc(100vh - 400px);
    padding: var(--space-8) 0;
}

.content-wrapper {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

@media (max-width: 480px) {
    .content-wrapper {
        padding: 0 12px;
    }
}

/* Show desktop navigation on screens 900px and wider */
@media (min-width: 900px) {
    .main-nav {
        display: block;
    }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

@media (min-width: 900px) {

    /* Show desktop nav, hide mobile toggle */
    .main-nav {
        display: block;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .mobile-nav {
        display: none;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 2fr repeat(3, 1fr);
    }

    .header-container {
        padding: var(--space-5) var(--container-padding);
    }
}

/* ============================================
   BREADCRUMB
   ============================================ */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumb-separator {
    color: var(--color-gray-400);
}

.breadcrumb a {
    color: var(--color-primary);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Source: css/calculator.css */
/* ============================================
   PercentagePro - Calculator Component Styles
   ============================================ */

/* ============================================
   CALCULATOR CONTAINER
   ============================================ */

.calculator-container {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
}

.calculator-title {
    text-align: center;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.calculator-title span,
.education-title span,
.related-title span,
.sidebar-title span,
.section-title span {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] .calculator-title {
    color: var(--color-gray-100);
}

.calculator-description {
    text-align: center;
    color: var(--color-gray-600);
    margin-bottom: var(--space-8);
    font-size: var(--text-lg);
}

/* ============================================
   CALCULATOR FORM
   ============================================ */

.calculator-form {
    background: var(--color-gray-50);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
    font-size: var(--text-base);
}

.form-label .label-optional {
    font-weight: var(--font-normal);
    color: var(--color-gray-500);
    font-size: var(--text-sm);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--space-4) var(--space-5);
    /* Increased for better touch */
    min-height: 56px;
    /* WCAG AAA touch target */
    font-size: var(--text-lg);
    /* Larger for readability */
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    /* More rounded */
    background: white;
    color: var(--color-gray-900);
    transition: all var(--transition-base);
    font-family: var(--font-mono);
}

.form-input:focus,
.form-select:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
    /* Violet glow */
    transform: translateY(-1px);
}

.form-input::placeholder {
    color: var(--color-gray-400);
    font-family: var(--font-primary);
}

.form-input.error,
.form-select.error {
    border-color: var(--color-error);
}

.form-input.error:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15);
}

.form-help {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-top: var(--space-2);
}

.form-error {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-error);
    margin-top: var(--space-2);
    font-weight: var(--font-medium);
}

/* Input with Icon/Symbol */
.input-group {
    position: relative;
    display: flex;
    align-items: stretch;
}

.input-addon {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    background: var(--color-gray-200);
    border: 2px solid var(--color-gray-300);
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    font-family: var(--font-mono);
}

.input-group .form-input {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Toggle Switch */
.toggle-group {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    margin-bottom: var(--space-4);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-gray-300);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

.toggle-switch input:checked+.toggle-slider {
    background-color: var(--color-primary);
}

.toggle-switch input:checked+.toggle-slider:before {
    transform: translateX(24px);
}

/* ============================================
   CALCULATOR ACTIONS
   ============================================ */

.calculator-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-top: var(--space-6);
}

.btn-calculate {
    flex: 1;
    min-width: 150px;
    min-height: 56px;
    /* Better touch target */
    background: linear-gradient(135deg, var(--color-action) 0%, var(--color-action-dark) 100%);
    color: white;
    padding: var(--space-5) var(--space-8);
    font-size: var(--text-xl);
    /* Larger text */
    font-weight: var(--font-bold);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 14px 0 rgba(249, 115, 22, 0.4);
    letter-spacing: 0.5px;
}

.btn-calculate:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px 0 rgba(249, 115, 22, 0.6);
    background: linear-gradient(135deg, var(--color-action-dark) 0%, var(--color-action) 100%);
}

.btn-calculate:active {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px 0 rgba(249, 115, 22, 0.4);
}

.btn-reset {
    background: white;
    color: var(--color-gray-700);
    padding: var(--space-4) var(--space-6);
    min-height: 56px;
    /* Match calculate button */
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-reset:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-400);
    transform: translateY(-1px);
}

/* ============================================
   RESULT DISPLAY
   ============================================ */

.result-section {
    display: none;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    margin-top: var(--space-6);
    color: white;
    text-align: center;
    animation: slideDown var(--transition-slow);
}

.result-section.visible {
    display: block;
}

.result-label {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    opacity: 0.95;
    margin-bottom: var(--space-2);
}

.result-value {
    font-size: clamp(3rem, 10vw, 4rem);
    /* Responsive 48px - 64px */
    font-weight: var(--font-bold);
    font-family: var(--font-mono);
    margin-bottom: var(--space-4);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.result-explanation {
    font-size: var(--text-xl);
    /* Larger */
    opacity: 0.95;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.result-details {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.result-details-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    font-size: var(--text-base);
}

.result-details-label {
    opacity: 0.9;
}

.result-details-value {
    font-weight: var(--font-bold);
    font-family: var(--font-mono);
}

/* ============================================
   STEP-BY-STEP EXPLANATION
   ============================================ */

.steps-section {
    background: var(--color-gray-50);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin-top: var(--space-6);
}

.steps-title {
    font-size: var(--text-xl);
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.step-item {
    background: white;
    padding: var(--space-4);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-weight: var(--font-bold);
    font-size: var(--text-sm);
    margin-right: var(--space-3);
}

.step-content {
    display: inline;
    color: var(--color-gray-700);
    font-family: var(--font-mono);
    font-size: var(--text-base);
}

.step-formula {
    display: block;
    background: var(--color-gray-900);
    color: var(--color-accent-light);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-top: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--text-base);
    overflow-x: auto;
}

/* ============================================
   EDUCATIONAL CONTENT
   ============================================ */

.education-section {
    margin-top: var(--space-12);
    padding-top: var(--space-12);
    border-top: 2px solid var(--color-gray-200);
}

.education-title {
    font-size: var(--text-3xl);
    color: var(--color-gray-900);
    margin-bottom: var(--space-8);
    text-align: center;
}

.education-block {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-base);
}

.education-block h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-4);
    font-size: var(--text-xl);
}

.formula-box {
    background: var(--color-gray-900);
    color: white;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin: var(--space-4) 0;
    border-left: 6px solid var(--color-accent);
}

.formula-box .formula-title {
    color: var(--color-accent-light);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-3);
}

.formula-expression {
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: white;
    text-align: center;
    margin: var(--space-4) 0;
}

.formula-variables {
    display: grid;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.formula-variable {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-gray-300);
    font-size: var(--text-sm);
}

.variable-symbol {
    font-family: var(--font-mono);
    font-weight: var(--font-bold);
    color: var(--color-accent-light);
    min-width: 30px;
}

.worked-example {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 2px solid var(--color-info);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin: var(--space-4) 0;
}

.worked-example h4 {
    color: var(--color-info);
    margin-bottom: var(--space-4);
}

.example-given {
    background: white;
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-family: var(--font-mono);
}

.example-steps {
    margin: var(--space-4) 0;
}

.example-step {
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-2);
    background: white;
    border-left: 3px solid var(--color-info);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.example-answer {
    background: var(--color-info);
    color: white;
    padding: var(--space-4);
    border-radius: var(--radius-md);
    font-weight: var(--font-bold);
    text-align: center;
    margin-top: var(--space-4);
}

.use-cases ul,
.tips-box ul {
    margin-left: var(--space-6);
}

.use-cases li,
.tips-box li {
    margin-bottom: var(--space-3);
    line-height: 1.7;
}

.tips-box {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-left: 6px solid var(--color-warning);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
}

.tips-box h3 {
    color: #92400e;
}

/* ============================================
   RELATED CALCULATORS
   ============================================ */

.related-calculators {
    margin-top: var(--space-12);
    padding: var(--space-8);
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
}

@media (max-width: 767px) {
    .calculator-container {
        padding: var(--space-5);
    }
}

@media (max-width: 360px) {
    .result-value {
        font-size: 2.5rem;
    }
}

.related-title {
    font-size: var(--text-2xl);
    text-align: center;
    margin-bottom: var(--space-6);
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

.related-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    background: white;
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--color-gray-800);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.related-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    text-decoration: none;
}

.related-icon {
    font-size: var(--text-3xl);
    min-width: 50px;
    text-align: center;
}

.related-info h4 {
    color: var(--color-gray-900);
    font-size: var(--text-lg);
    margin-bottom: var(--space-1);
}

.related-info p {
    color: var(--color-gray-600);
    font-size: var(--text-sm);
    margin-bottom: 0;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (min-width: 640px) {
    .calculator-actions {
        flex-wrap: nowrap;
    }

    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .calculator-container {
        padding: var(--space-10);
    }

    .result-value {
        font-size: var(--text-5xl);
    }

    /* Input Groups / Wrappers */
    .input-wrapper {
        display: flex;
        align-items: stretch;
        /* Stretch children to match height */
        position: relative;
        width: 100%;
    }

    .input-prefix,
    .input-addon {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0 1rem;
        background-color: var(--color-gray-100);
        border: 1px solid var(--color-gray-300);
        color: var(--color-gray-600);
        font-weight: 500;
        font-size: 1rem;
        white-space: nowrap;
    }

    .input-prefix {
        border-right: none;
        border-radius: var(--radius-md) 0 0 var(--radius-md);
    }

    .input-addon {
        border-left: none;
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
    }

    .input-wrapper .form-input {
        flex: 1;
        width: 1%;
        /* Fix for flexbox child width issues */
        min-width: 0;
        margin: 0;
        border-radius: 0;
        z-index: 1;
        /* Ensure input border sits on top if needed */
    }

    /* Rounded corners logic based on siblings */
    .input-wrapper .input-prefix+.form-input {
        border-top-left-radius: 0;
        border-bottom-left-radius: 0;
    }

    .input-wrapper .form-input:not(:last-child) {
        border-top-right-radius: 0;
        border-bottom-right-radius: 0;
    }

    .input-wrapper .form-input:first-child {
        border-top-left-radius: var(--radius-md);
        border-bottom-left-radius: var(--radius-md);
    }

    .input-wrapper .form-input:last-child {
        border-top-right-radius: var(--radius-md);
        border-bottom-right-radius: var(--radius-md);
    }

    .input-wrapper .form-input:focus {
        z-index: 2;
        /* Bring focus ring to top */
    }
}

@media (min-width: 1024px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Copy Button */
.copy-result-btn {
    margin-left: 0.5rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--color-gray-50);
    color: var(--color-gray-700);
    cursor: pointer;
    transition: all 0.2s ease;
    vertical-align: middle;
}


/* Social Sharing Actions */
.share-actions-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--color-gray-200);
}

.share-label {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.share-buttons-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

/* Base Share Button */
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
    border: none;
    cursor: pointer;
    line-height: 1;
    color: white;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    opacity: 0.95;
    color: white;
    text-decoration: none;
}

/* Platform Colors */
.share-btn-whatsapp {
    background-color: #25D366;
}

.share-btn-twitter {
    background-color: #000000;
}

.share-btn-facebook {
    background-color: #1877F2;
}

/* Copy Link Variant */
.share-btn-copy {
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}


/* Dark Mode Overrides for Share Section */
[data-theme="dark"] .share-actions-container {
    border-top-color: var(--color-gray-700);
}

[data-theme="dark"] .share-label {
    color: var(--color-gray-400);
}

[data-theme="dark"] .share-btn-copy {
    background-color: var(--color-gray-800);
    color: var(--color-gray-300);
    border-color: var(--color-gray-600);
}

[data-theme="dark"] .share-btn-copy:hover {
    background-color: var(--color-gray-700);
    color: var(--color-white);
}

/* Platform buttons usually hold up well, but let's ensure text is white */
[data-theme="dark"] .share-btn-whatsapp,
[data-theme="dark"] .share-btn-twitter,
[data-theme="dark"] .share-btn-facebook {
    color: #ffffff;
}

/* Mobile-specific fixes for result display */
@media (max-width: 480px) {

    /* Stack copy button below result value instead of inline */
    .copy-result-btn {
        display: block;
        margin: var(--space-3) auto 0;
        width: auto;
        padding: 0.5rem 1.5rem;
        font-size: 0.875rem;
    }

    /* Stack share buttons vertically for better mobile UX */
    .share-buttons-row {
        flex-direction: column;
        gap: var(--space-2);
        width: 100%;
    }

    .share-btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1rem;
    }

    /* Reduce result explanation font size on very small screens */
    .result-explanation {
        font-size: var(--text-base);
    }
}

/* Dark Mode Input Group Fixes */
[data-theme="dark"] .input-prefix,
[data-theme="dark"] .input-addon {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-700);
    color: var(--color-gray-400);
}

/* ============================================
   AD CONTAINERS
   ============================================ */

.ad-container {
    margin: var(--space-6) 0;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.ad-after-result {
    margin-top: var(--space-8);
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    border: 1px dashed var(--color-gray-300);
}

.ad-in-content {
    margin: var(--space-8) 0;
    padding: var(--space-2);
}

/* Dark mode for ads */
[data-theme="dark"] .ad-container {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
}

[data-theme="dark"] .ad-after-result {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

/* ============================================
   CALCULATE AGAIN BUTTON
   ============================================ */

.calculate-again-wrapper {
    text-align: center;
    margin-top: var(--space-4);
}

.btn-calculate-again {
    background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    color: white;
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.4);
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.4);
    }

    50% {
        box-shadow: 0 4px 20px 0 rgba(16, 185, 129, 0.6);
    }
}

.btn-calculate-again:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px 0 rgba(16, 185, 129, 0.6);
}

.btn-calculate-again:active {
    transform: translateY(-1px);
}

/* Dark mode */
[data-theme="dark"] .btn-calculate-again {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
}

/* ============================================
   FAQ SECTION (Added for Premium Look)
   ============================================ */

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.faq-question {
    padding: var(--space-4) var(--space-6);
    margin-bottom: 0 !important;
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-900);
    font-size: var(--text-lg) !important;
    font-weight: 600;
}

.faq-answer {
    padding: var(--space-5) var(--space-6);
    color: var(--color-gray-700);
    line-height: 1.6;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

/* Dark Mode FAQ */
[data-theme="dark"] .faq-item {
    background: var(--color-gray-100);
    border-color: var(--color-gray-300);
}

[data-theme="dark"] .faq-question {
    background: var(--color-gray-200);
    border-color: var(--color-gray-300);
    color: var(--color-gray-900);
}

[data-theme="dark"] .faq-answer {
    color: var(--color-gray-700);
    background: var(--color-gray-100);
}

/* ============================================
   FAQ CARD GRID STYLES
   ============================================ */

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.faq-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.faq-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-primary-light);
}

.faq-card h4 {
    color: var(--color-gray-900);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.faq-card p {
    color: var(--color-gray-600);
    font-size: var(--text-base);
    line-height: 1.7;
    margin: 0;
}

/* Dark Mode FAQ Cards */
[data-theme="dark"] .faq-card {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
}

[data-theme="dark"] .faq-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.15);
}

[data-theme="dark"] .faq-card h4 {
    color: var(--color-gray-100);
}

[data-theme="dark"] .faq-card p {
    color: var(--color-gray-400);
}

/* Section intro text */
.section-intro {
    color: var(--color-gray-600);
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

[data-theme="dark"] .section-intro {
    color: var(--color-gray-400);
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .faq-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .faq-card {
        padding: var(--space-5);
    }
}

/* ============================================
   ARTICLE META (AUTHOR/DATE ATTRIBUTION)
   ============================================ */

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 20px 0;
    padding: 12px 16px;
    background: var(--bg-secondary, #f8f9fa);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary, #6c757d);
    flex-wrap: wrap;
}

.article-meta .meta-author,
.article-meta .meta-date {
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-meta svg {
    flex-shrink: 0;
}

[data-theme="dark"] .article-meta {
    background: var(--color-gray-800);
    color: #e2e8f0;
}

[data-theme="dark"] .article-meta strong {
    color: #ffffff;
}

[data-theme="dark"] .article-meta svg {
    color: var(--color-primary-light);
}

@media (max-width: 640px) {
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px;
    }
}

/* ============================================
   REFERENCES SECTION (AUTHORITATIVE CITATIONS)
   ============================================ */

.references-section {
    margin: 24px 0;
    padding: 20px;
    background: var(--bg-tertiary, #f1f3f5);
    border-radius: 12px;
    border-left: 4px solid var(--accent-color, #4dabf7);
}

.references-section h3 {
    margin: 0 0 12px 0;
    font-size: 1.1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.references-section p {
    margin: 0 0 12px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.references-section ul {
    margin: 0;
    padding-left: 20px;
    font-size: 0.9rem;
}

.references-section ul li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.references-section a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.references-section a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

[data-theme="dark"] .references-section {
    background: #111827;
    /* Darker navy for better section separation */
    border-left-color: var(--color-primary);
}

[data-theme="dark"] .references-section h3 {
    color: #ffffff;
}

[data-theme="dark"] .references-section h3 span {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    background-clip: text;
}

[data-theme="dark"] .references-section p {
    color: #cbd5e1;
}

[data-theme="dark"] .references-section ul {
    color: #94a3b8;
}

[data-theme="dark"] .references-section a {
    color: #60a5fa;
}

@media (max-width: 640px) {
    .references-section {
        padding: 16px;
        margin: 16px 0;
    }

    .references-section ul {
        padding-left: 16px;
    }
}

/* ============================================
   EXPANDED EDUCATIONAL CONTENT
   ============================================ */

.education-section.expanded-content {
    margin: 24px 0;
}

.education-section.expanded-content .education-block {
    line-height: 1.7;
}

.education-section.expanded-content .education-block h3 {
    color: var(--color-gray-800);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 20px 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.education-section .education-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.education-section.expanded-content .education-block h3:first-child {
    margin-top: 0;
}

.education-section.expanded-content .education-block p {
    color: var(--color-gray-600);
    margin-bottom: 16px;
}

[data-theme="dark"] .article-meta {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
    border: 1px solid var(--color-gray-300);
}

[data-theme="dark"] .article-meta strong {
    color: var(--color-gray-900);
}

[data-theme="dark"] .article-meta svg {
    color: var(--color-primary);
}

[data-theme="dark"] .calculator-description {
    color: var(--color-gray-600);
}

[data-theme="dark"] .form-label {
    color: var(--color-gray-800);
}

[data-theme="dark"] .form-help {
    color: var(--color-gray-500);
}

[data-theme="dark"] .input-prefix,
[data-theme="dark"] .input-addon {
    color: var(--color-gray-500);
    background: var(--color-gray-300);
    border-color: var(--color-gray-400);
}

[data-theme="dark"] .form-group label span {
    color: var(--color-gray-600);
}

[data-theme="dark"] .tips-box {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: #f59e0b;
}

[data-theme="dark"] .tips-box h3 {
    color: #fbbf24;
}

[data-theme="dark"] .tips-box ul li {
    color: #fcd34d;
}

[data-theme="dark"] .related-calculators {
    background: var(--color-gray-100);
}

[data-theme="dark"] .result-details-label {
    color: var(--color-gray-500);
}

[data-theme="dark"] .result-details-value {
    color: var(--color-gray-900);
}

[data-theme="dark"] .breadcrumb-separator {
    color: var(--color-gray-400);
}

[data-theme="dark"] .breadcrumb-item,
[data-theme="dark"] .breadcrumb-item a {
    color: var(--color-gray-500);
}

[data-theme="dark"] .education-section.expanded-content .education-block h3 {
    color: #ffffff;
    /* Pure white */
}

[data-theme="dark"] .education-section.expanded-content .education-block p,
[data-theme="dark"] .education-section.expanded-content .education-block ul li {
    color: #e2e8f0;
    /* Brightest slate */
}

[data-theme="dark"] .education-section.expanded-content .education-block ul li strong,
[data-theme="dark"] .education-block strong {
    color: #ffffff !important;
    /* Force white for labels */
    font-weight: 700;
}

@media (max-width: 640px) {
    .education-section.expanded-content {
        margin: 16px 0;
    }

    .education-section.expanded-content .education-block ul {
        padding-left: 20px;
    }
}

/* Source: css/calculator-sidebar.css */
/* ============================================
   CALCULATOR PAGE LAYOUT WITH SIDEBAR
   ============================================ */

.calculator-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-top: var(--space-6);
}

/* Sidebar Styles */
.calculator-sidebar {
    display: none;
    /* Hidden on mobile */
}

.sidebar-widget {
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-primary);
}

.sidebar-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-links li {
    margin-bottom: var(--space-2);
}

.sidebar-links a {
    display: flex;
    align-items: center;
    padding: var(--space-2);
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: var(--text-sm);
}

.sidebar-links a:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
    padding-left: var(--space-3);
}

.sidebar-links a:hover::before {
    content: '\2192 ';
    margin-right: var(--space-1);
}

/* Desktop Layout */
@media (min-width: 1024px) {
    .calculator-layout {
        grid-template-columns: 1fr 280px;
    }

    .calculator-sidebar {
        display: block;
        position: sticky;
        top: var(--space-6);
        align-self: start;
    }
}

/* Make sidebar sticky without overlapping */
@media (min-width: 1200px) {
    .calculator-layout {
        grid-template-columns: 1fr 320px;
    }
}

/* Source: css/hero.css */
/* ============================================
   HERO SECTION - STYLES
   ============================================ */

.hero {
    background: linear-gradient(135deg,
            #f8f9ff 0%,
            #fef3f9 25%,
            #fff8f0 50%,
            #f5f3ff 75%,
            #fff 100%);
    background-size: 400% 400%;
    animation: gradientMesh 15s ease infinite;
    padding: var(--space-20) 0 var(--space-16);
    position: relative;
    overflow: hidden;
    min-height: 700px;
    /* Increased for desktop stability */
    display: flex;
    align-items: center;
}

@keyframes gradientMesh {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* Floating particles background */
.hero::before {
    content: '% % % % %';
    position: absolute;
    top: 10%;
    left: 0;
    right: 0;
    font-size: 6rem;
    color: rgba(139, 92, 246, 0.03);
    text-align: center;
    letter-spacing: 4rem;
    animation: floatParticles 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes floatParticles {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-30px) rotate(10deg);
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -2px;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-gray-700);
    margin-bottom: var(--space-10);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Glassmorphism Calculator Card */
.main-calculator {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    box-shadow:
        0 20px 60px rgba(139, 92, 246, 0.15),
        0 8px 16px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    animation: scaleIn 0.6s ease-out 0.4s both;
    position: relative;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Glow effect on calculator */
.main-calculator::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-xl);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-base);
}

.main-calculator:hover::before {
    opacity: 0.15;
}

.main-calculator h2 {
    text-align: center;
    margin-bottom: var(--space-2);
    color: var(--color-gray-900);
    font-size: var(--text-2xl);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero {
        padding: var(--space-12) 0 var(--space-8);
        min-height: 550px;
        /* Specific height for mobile to prevent CLS */
    }

    .hero::before {
        display: none;
        /* Hide floating symbols on mobile to prevent overflow */
    }

    .hero h1 {
        font-size: 2.25rem;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 1.125rem;
        padding: 0 var(--container-padding);
        margin-bottom: var(--space-6);
    }

    .main-calculator {
        padding: var(--space-6) var(--space-4);
        margin: 0 var(--space-2);
        border-radius: var(--radius-lg);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--space-10) 0 var(--space-6);
        min-height: 500px;
    }

    .hero h1 {
        font-size: 1.75rem;
        /* Reduced from 1.875rem for better mobile fit */
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: var(--space-5);
    }

    .main-calculator {
        padding: var(--space-5) var(--space-3);
        margin: 0 var(--space-1);
    }
}

/* Source: css/homepage-enhancements.css */
/* ============================================
   HOMEPAGE ENHANCEMENTS - PREMIUM FEATURES
   Trust Bar, Stats Counter, Hover Effects
   ============================================ */

/* Trust Indicators Bar */
.trust-bar {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    padding: var(--space-4) 0;
    overflow: hidden;
    position: relative;
}

.trust-items {
    display: flex;
    gap: var(--space-12);
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    animation: trustFadeIn 1s ease-out 1s both;
}

@keyframes trustFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

.trust-icon {
    font-size: var(--text-xl);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

/* Statistics Counter Section */
.stats-section {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    max-width: 1000px;
    margin: 0 auto;
}

.stat-card {
    text-align: center;
    padding: var(--space-6);
}

.stat-number {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: var(--space-2);
}

.stat-label {
    color: var(--color-gray-600);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
}

/* Category Card Hover Effects */
.category-card {
    transition: all var(--transition-base);
    position: relative;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(249, 115, 22, 0.05) 100%);
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(139, 92, 246, 0.1);
}

.category-card:hover::before {
    opacity: 1;
}

.category-icon {
    font-size: var(--text-3xl);
    display: inline-block;
    transition: transform var(--transition-base);
}

.category-card:hover .category-icon {
    transform: scale(1.2) rotate(5deg);
}

/* Feature Card Enhancements */
.feature-card {
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: inline-block;
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(-5deg);
}

/* Calculator Result Animation Enhancement */
.result-section {
    animation: resultPop 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) both;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    margin-top: var(--space-8);
}

@keyframes resultPop {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Button Hover Enhancements */
.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow:
        0 8px 24px rgba(249, 115, 22, 0.3),
        0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-calculate:active {
    transform: translateY(0);
}

/* Smooth Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Link Hover Effects */
.calculator-list a {
    transition: all var(--transition-fast);
    position: relative;
    padding-left: var(--space-2);
}

.calculator-list a::before {
    content: '\2192';
    position: absolute;
    left: 0;
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-fast);
}

.calculator-list a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.calculator-list a:hover {
    color: var(--color-primary);
    padding-left: var(--space-6);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .trust-items {
        gap: var(--space-4);
        font-size: var(--text-xs);
        padding: 0 var(--container-padding);
    }

    .trust-item {
        flex: 1 1 40%;
        /* Allow items to wrap more effectively on small screens */
        justify-content: center;
    }

    .trust-icon {
        font-size: var(--text-base);
    }

    .stats-section {
        padding: var(--space-10) 0;
    }

    .stats-grid {
        gap: var(--space-4);
        padding: 0 var(--container-padding);
    }

    .stat-card {
        padding: var(--space-4);
    }

    .stat-number {
        font-size: 2.25rem;
    }

    .category-card:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 480px) {
    .trust-item {
        flex: 1 1 100%;
    }
}

/* Source: css/index-page.css */
/* ============================================
   INDEX PAGE SPECIFIC STYLES
   ============================================ */

.features {
    padding: var(--space-16) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.feature-card {
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    width: 100%;
    /* Ensure full width availability */
}

.feature-card .feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.feature-card h3 {
    margin-bottom: var(--space-3);
    color: var(--color-gray-900);
}

.feature-card p {
    color: var(--color-gray-600);
}

.categories {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
}

.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.category-card {
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.category-card h3 {
    margin-bottom: var(--space-4);
    color: var(--color-gray-900);
}

.category-icon {
    margin-right: var(--space-2);
}

.calculator-list {
    list-style: none;
    padding-left: 0;
}

.calculator-list li {
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.calculator-list li:last-child {
    border-bottom: none;
}

.calculator-list a {
    color: var(--color-primary);
    text-decoration: none;
}

.calculator-list a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.education {
    padding: var(--space-16) 0;
}

.education-content {
    max-width: 800px;
    margin: 0 auto;
}

.formula-box {
    background: var(--color-gray-50);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin: var(--space-6) 0;
}

.formula-title {
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.formula-expression {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    text-align: center;
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    color: var(--color-gray-900);
}

.formula-variables {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.formula-variable {
    display: flex;
    gap: var(--space-2);
    color: var(--color-gray-700);
}

.formula-variable span:not(.variable-symbol) {
    color: var(--color-gray-600);
}

.variable-symbol {
    font-weight: var(--font-bold);
    color: var(--color-primary);
    font-family: var(--font-mono);
}

/* Mobile: Single column for better readability */
@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
}

/* Responsive */
@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Source: css/search.css */
/**
 * PercentagePro - Search Styles
 * Premium search UI with glassmorphism, header search, and dark mode support
 */

/* ============================================
   Header Inline Search Bar
   ============================================ */

.header-search {
    display: flex;
    align-items: center;
    position: relative;
    flex: 1;
    max-width: 400px;
    margin: 0 24px;
    background: #f1f5f9;
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 8px 14px;
    transition: all 0.2s ease;
    z-index: 1001;
    /* Ensure search box stays above dropdown */
}

.header-search:focus-within {
    background: white;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.header-search-icon {
    font-size: 1rem;
    margin-right: 10px;
    opacity: 0.5;
}

.header-search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.9rem;
    font-family: inherit;
    color: #1e293b;
    min-width: 0;
}

.header-search-input::placeholder {
    color: #94a3b8;
}

.header-search-shortcut {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    color: #64748b;
    font-family: inherit;
    white-space: nowrap;
}

/* Header Search Results Dropdown */
.header-search-results {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
}

.header-search-results.active {
    display: block;
}

.header-search-results::-webkit-scrollbar {
    width: 6px;
}

.header-search-results::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

/* Header Result Items */
.header-result-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    text-decoration: none;
    color: inherit;
    gap: 12px;
    transition: background 0.15s ease;
}

.header-result-item:hover,
.header-result-item.active {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(139, 92, 246, 0.06) 100%);
    text-decoration: none;
}

.header-result-item .result-icon {
    font-size: 1.25rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 8px;
}

.header-result-item .result-info {
    flex: 1;
    min-width: 0;
}

.header-result-item .result-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: #1e293b;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-result-item .result-name mark {
    background: rgba(37, 99, 235, 0.2);
    color: #2563eb;
    padding: 0 2px;
    border-radius: 2px;
}

.header-result-item .result-category {
    font-size: 0.75rem;
    color: #64748b;
}

/* Header Search Empty State */
.header-search-empty {
    padding: 24px;
    text-align: center;
    color: #64748b;
}

.header-search-empty-icon {
    font-size: 2rem;
    margin-bottom: 8px;
    opacity: 0.5;
}

/* Mobile: Hide header search, show toggle */
@media (max-width: 900px) {
    .header-search {
        display: none;
    }
}

/* ============================================
   Mobile Search Toggle Button
   ============================================ */

.mobile-search-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s ease;
    margin-right: 8px;
}

.mobile-search-toggle:hover {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    transform: scale(1.05);
}

.mobile-search-toggle:active {
    transform: scale(0.95);
}

@media (max-width: 900px) {
    .mobile-search-toggle {
        display: flex;
    }
}

/* Dark Mode */
[data-theme="dark"] .mobile-search-toggle {
    background: linear-gradient(135deg, #334155 0%, #475569 100%);
}

[data-theme="dark"] .mobile-search-toggle:hover {
    background: linear-gradient(135deg, #475569 0%, #64748b 100%);
}

/* ============================================
   Search Modal Overlay
   ============================================ */

.search-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.search-modal.active {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    opacity: 1;
}

.search-modal-content {
    width: 100%;
    max-width: 600px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    transform: translateY(-20px);
    animation: searchModalSlideIn 0.25s ease forwards;
}

@keyframes searchModalSlideIn {
    to {
        transform: translateY(0);
    }
}

/* Search Input */
.search-input-wrapper {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #e2e8f0;
    gap: 12px;
}

.search-icon {
    font-size: 1.25rem;
    opacity: 0.5;
}

#search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.125rem;
    font-family: inherit;
    background: transparent;
    color: #1e293b;
}

#search-input::placeholder {
    color: #94a3b8;
}

.search-shortcut {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: #64748b;
    background: #f1f5f9;
    padding: 4px 8px;
    border-radius: 6px;
}

.search-shortcut kbd {
    font-family: inherit;
    font-weight: 600;
}

/* Search Results */
.search-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 8px;
}

.search-results::-webkit-scrollbar {
    width: 8px;
}

.search-results::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.search-results::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

/* Empty State */
.search-empty {
    padding: 40px 20px;
    text-align: center;
    color: #64748b;
}

.search-empty-icon {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.5;
}

.search-empty-text {
    font-size: 1rem;
    margin-bottom: 8px;
}

.search-empty-hint {
    font-size: 0.875rem;
    color: #94a3b8;
}

.search-no-results {
    padding: 40px 20px;
    text-align: center;
    color: #64748b;
}

/* Search Result Items */
.search-result-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    color: inherit;
    gap: 14px;
}

.search-result-item:hover,
.search-result-item.active {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    text-decoration: none;
}

.result-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 10px;
    transition: transform 0.15s ease;
}

.search-result-item:hover .result-icon {
    transform: scale(1.1);
}

.result-info {
    flex: 1;
    min-width: 0;
}

.result-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: #1e293b;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-name mark {
    background: rgba(37, 99, 235, 0.2);
    color: #2563eb;
    padding: 0 2px;
    border-radius: 2px;
}

.result-category {
    font-size: 0.8rem;
    color: #64748b;
}

.result-arrow {
    font-size: 1rem;
    color: #94a3b8;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.search-result-item:hover .result-arrow {
    opacity: 1;
}

/* Search Footer */
.search-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    font-size: 0.75rem;
    color: #64748b;
}

.search-footer-hint {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-footer-hint span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.search-footer-hint kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    font-family: inherit;
}

/* Mobile Modal */
@media (max-width: 640px) {
    .search-modal.active {
        padding-top: 0;
        align-items: stretch;
    }

    .search-modal-content {
        max-width: 100%;
        height: 100%;
        border-radius: 0;
        display: flex;
        flex-direction: column;
    }

    .search-results {
        flex: 1;
        max-height: none;
    }

    .search-shortcut {
        display: none;
    }
}

/* ============================================
   Dark Mode
   ============================================ */

/* Header Search Dark Mode */
[data-theme="dark"] .header-search {
    background: #334155;
    border-color: transparent;
}

[data-theme="dark"] .header-search:focus-within {
    background: #1e293b;
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
}

[data-theme="dark"] .header-search-input {
    color: #f8fafc;
}

[data-theme="dark"] .header-search-input::placeholder {
    color: #94a3b8;
}

[data-theme="dark"] .header-search-shortcut {
    background: #475569;
    border-color: #64748b;
    color: #e2e8f0;
}

[data-theme="dark"] .header-search-results {
    background: #1e293b;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .header-result-item:hover,
[data-theme="dark"] .header-result-item.active {
    background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .header-result-item .result-icon {
    background: #334155;
}

[data-theme="dark"] .header-result-item .result-name {
    color: #f8fafc;
}

[data-theme="dark"] .header-result-item .result-name mark {
    background: rgba(96, 165, 250, 0.3);
    color: #60a5fa;
}

[data-theme="dark"] .header-result-item .result-category {
    color: #94a3b8;
}

[data-theme="dark"] .header-search input::placeholder {
    color: #cbd5e1;
}

[data-theme="dark"] .header-search-icon {
    color: #cbd5e1;
}

[data-theme="dark"] .header-search-empty {
    color: #94a3b8;
}

/* Modal Dark Mode */
[data-theme="dark"] .search-modal {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .search-modal-content {
    background: #1e293b;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .search-input-wrapper {
    border-color: #334155;
}

[data-theme="dark"] #search-input {
    color: #f8fafc;
}

[data-theme="dark"] .search-shortcut {
    background: #334155;
    color: #94a3b8;
}

[data-theme="dark"] .search-results::-webkit-scrollbar-track {
    background: #1e293b;
}

[data-theme="dark"] .search-results::-webkit-scrollbar-thumb {
    background: #475569;
}

[data-theme="dark"] .search-empty,
[data-theme="dark"] .search-no-results {
    color: #94a3b8;
}

[data-theme="dark"] .search-result-item:hover,
[data-theme="dark"] .search-result-item.active {
    background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .result-icon {
    background: #334155;
}

[data-theme="dark"] .result-name {
    color: #f8fafc;
}

[data-theme="dark"] .result-name mark {
    background: rgba(96, 165, 250, 0.3);
    color: #60a5fa;
}

[data-theme="dark"] .result-category {
    color: #94a3b8;
}

[data-theme="dark"] .search-footer {
    background: #0f172a;
    border-color: #334155;
    color: #cbd5e1;
}

[data-theme="dark"] .search-footer-hint kbd {
    background: #334155;
    border-color: #475569;
    color: #e2e8f0;
}


/* Support for Step-by-Step Calculation Formulas */
.step-formula {
    display: block;
    background: var(--color-gray-100);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    margin-top: var(--space-2);
    font-family: var(--font-mono);
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
}

[data-theme="dark"] .step-formula {
    background: var(--color-gray-800);
    color: var(--color-primary-light);
}