/* Math Solver — full-width tool page (percentage + basic algebra) */

/* —— Desktop: wide tool column (not the cramped 22rem numeric-field slot) —— */
@media (min-width: 1120px) {
  body:has(.calculator-layout) .calculator-container.calculator-container--math-solver {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(26rem, 1.2fr);
    column-gap: var(--space-6, 1.5rem);
    row-gap: var(--space-3, 0.75rem);
    align-items: start;
    padding: var(--space-6, 1.5rem);
  }

  body:has(.calculator-layout) .calculator-container.calculator-container--math-solver > .calculator-container-intro {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  body:has(.calculator-layout) .calculator-container.calculator-container--math-solver > .calculator-widget-stack,
  body:has(.calculator-layout) .calculator-container.calculator-container--math-solver > #calculator-form,
  body:has(.calculator-layout) .calculator-container.calculator-container--math-solver > #result-section {
    grid-column: 2;
    grid-row: 1;
    max-width: none;
    width: 100%;
    justify-self: stretch;
    align-self: start;
  }

  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver:has(#result-section.visible)
    > .calculator-widget-stack {
    display: contents;
  }

  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver:has(#result-section.visible)
    > .calculator-widget-stack
    > .calculator-form,
  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver:has(#result-section.visible)
    > #calculator-form {
    grid-column: 2;
    grid-row: 1;
    max-width: none;
    width: 100%;
    justify-self: stretch;
  }

  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver:has(#result-section.visible)
    > .calculator-widget-stack
    > #result-section,
  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver:has(#result-section.visible)
    > #result-section {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: none;
    width: 100%;
    justify-self: stretch;
  }

  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver
    > #how-we-calculate,
  body:has(.calculator-layout)
    .calculator-container.calculator-container--math-solver
    > .education-block.how-we-calculate {
    grid-column: 1 / -1;
  }
}

.math-solver-shell {
  display: grid;
  gap: 0.85rem;
  position: relative;
  z-index: 2;
  scroll-margin-top: 6rem;
}

.math-solver-result {
  scroll-margin-top: 6rem;
  text-align: center;
  padding: 0.25rem 1.15rem 1.15rem;
  box-sizing: border-box;
}

.math-solver-result-body {
  text-align: center;
  width: 100%;
}

/* Match site result chrome: badge, answer, and explanation centered together */
.math-solver-result .result-label,
.math-solver-result .result-value,
.math-solver-result .result-explanation {
  text-align: center;
}

.math-solver-result .result-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 1rem auto 0.5rem;
}

.math-solver-result .result-value {
  display: block;
  width: 100%;
  margin: 0 auto 0.55rem;
  padding: 0;
}

.math-solver-result .result-explanation {
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 36rem;
  margin: 0 auto 0.85rem;
  text-align: center;
}

.math-solver-input-group {
  margin-bottom: 0;
}

/* Example chips — horizontal scroll so the input stays near the fold */
.math-solver-examples {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.45rem;
  margin: 0 0 0.75rem;
  overflow-x: auto;
  padding: 0.15rem 0.1rem 0.4rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.55) transparent;
  -webkit-overflow-scrolling: touch;
}

.math-solver-examples::-webkit-scrollbar {
  height: 4px;
}

.math-solver-examples::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.55);
  border-radius: 999px;
}

.math-solver-examples::-webkit-scrollbar-track {
  background: transparent;
}

.math-solver-examples button {
  appearance: none;
  flex: 0 0 auto;
  border: 1px solid rgba(37, 99, 235, 0.22);
  background: #eff6ff;
  color: #1e3a8a;
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.2;
  min-height: 2rem;
  white-space: nowrap;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.12s ease;
}

.math-solver-examples button:hover {
  border-color: rgba(37, 99, 235, 0.45);
  background: #dbeafe;
  transform: translateY(-1px);
}

.math-solver-examples button:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.55);
  outline-offset: 2px;
}

.math-solver-examples button[aria-pressed="true"] {
  background: #1d4ed8;
  border-color: #1d4ed8;
  color: #fff;
}

.math-solver-plain--hero {
  width: 100%;
  margin: 0;
  border: 1px solid #cbd5e1;
  border-radius: 14px;
  padding: 0.9rem 1rem;
  font-size: 1.125rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #fff;
  color: #0f172a;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  position: relative;
  z-index: 2;
}

.math-solver-plain--hero:focus {
  outline: 2px solid rgba(37, 99, 235, 0.35);
  outline-offset: 1px;
  border-color: #60a5fa;
}

/* Align with polished calculator-actions row */
.math-solver-form .calculator-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
}

.math-solver-form .calculator-actions .btn-calculate {
  flex: 1 1 12rem;
  min-width: 10rem;
}

.math-solver-form .calculator-actions .btn-reset,
.math-solver-form .calculator-actions .math-solver-kbd-toggle {
  flex: 0 1 auto;
}

.math-solver-kbd-toggle {
  appearance: none;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  color: #334155;
  border-radius: 10px;
  padding: 0.55rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.math-solver-kbd-toggle[aria-expanded="true"] {
  border-color: #93c5fd;
  background: #eff6ff;
  color: #1d4ed8;
}

.math-solver-kbd-panel {
  margin-top: 0.75rem;
  padding: 0.75rem;
  border-radius: 14px;
  border: 1px dashed #cbd5e1;
  background: #f8fafc;
}

.math-solver-kbd-panel[hidden] {
  display: none !important;
}

.math-solver-field-wrap {
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  background: #fff;
  padding: 0.55rem 0.7rem;
  min-height: 3rem;
}

.math-solver-field-wrap math-field {
  width: 100%;
  font-size: 1.2rem;
  border: none;
  outline: none;
  background: transparent;
  color: #0f172a;
}

.math-solver-help {
  margin: 0.45rem 0 0;
  font-size: 0.8125rem;
  color: #64748b;
}

.math-solver-help--live {
  margin: 0.45rem 0 0;
}

.math-solver-form .calculator-actions {
  margin-top: 0.65rem;
}

/* Match site type for plain numeric / percent answers (KaTeX uses Computer Modern) */
.math-solver-result .result-value:not(:has(.katex)) {
  font-family: inherit;
  font-variant-numeric: tabular-nums;
}

.math-solver-result .result-value .katex {
  font-size: 1.05em;
}

.math-solver-error {
  margin: 0.35rem 0 0;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
  display: grid;
  gap: 0.25rem;
}

.math-solver-error[hidden] {
  display: none !important;
}

.math-solver-error__hint {
  color: #b91c1c;
  font-size: 0.875rem;
}

/* Empty + result body */
.math-solver-empty {
  padding: 1.1rem 1rem;
  border-radius: 14px;
  border: 1px dashed #cbd5e1;
  background: #f8fafc;
  text-align: center;
}

.math-solver-empty[hidden] {
  display: none !important;
}

.math-solver-empty__title {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: #334155;
}

.math-solver-empty__hint {
  margin: 0;
  font-size: 0.875rem;
  color: #64748b;
}

.math-solver-result-body[hidden] {
  display: none !important;
}

.math-solver-result.visible {
  margin-top: 0.25rem;
}

.math-solver-steps-wrap {
  margin-top: 1rem;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  border: 1px solid rgba(37, 99, 235, 0.14);
  background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
  text-align: center;
}

.math-solver-steps-wrap[hidden] {
  display: none !important;
}

.math-solver-steps-wrap > h3 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  color: #1e3a8a;
  text-align: center;
}

.math-solver-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
  counter-reset: ms-step;
  text-align: left;
}

.math-solver-step {
  counter-increment: ms-step;
  display: grid;
  gap: 0.3rem;
  padding: 0.7rem 0.8rem 0.7rem 2.65rem;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  background: #fff;
  position: relative;
  text-align: left;
}

.math-solver-step::before {
  content: counter(ms-step);
  position: absolute;
  left: 0.65rem;
  top: 0.7rem;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 999px;
  background: #1d4ed8;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.math-solver-step__text {
  margin: 0;
  font-size: 0.9rem;
  color: #334155;
  font-weight: 600;
}

.math-solver-step__formula {
  font-size: 1.05rem;
  color: #0f172a;
  overflow: visible;
  max-width: 100%;
  padding: 0.2rem 0 0.35rem;
  line-height: 1.45;
}

.math-solver-step__formula .katex {
  font-size: 1.05em;
  line-height: 1.35;
}

.math-solver-step__formula .katex-display {
  margin: 0;
}

.math-solver-actions-anchor {
  display: none !important;
}

.math-solver-result.visible {
  margin-top: 0.85rem;
}

.math-solver-related {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.math-solver-related[hidden] {
  display: none !important;
}

.math-solver-related__label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #64748b;
  width: 100%;
}

.math-solver-related__link {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid #e2e8f0;
  background: #fff;
  color: #2563eb;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
}

.math-solver-related__link:hover {
  border-color: #93c5fd;
  background: #eff6ff;
}

/* Keep injected tool utilities readable under the wider form */
.math-solver-form .calculator-tool-utilities {
  margin-top: 0.85rem;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
}

@media (max-width: 640px) {
  .math-solver-plain--hero {
    font-size: 1rem;
    padding: 0.8rem 0.85rem;
  }

  .math-solver-form .calculator-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .math-solver-form .calculator-actions .btn-calculate,
  .math-solver-form .calculator-actions .btn-reset,
  .math-solver-form .calculator-actions .math-solver-kbd-toggle {
    width: 100%;
    flex: none;
    justify-content: center;
  }

  .math-solver-examples button {
    font-size: 0.78rem;
    padding: 0.4rem 0.65rem;
  }
}

/* —— Dark mode —— */
[data-theme="dark"] .math-solver-examples button {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(129, 140, 248, 0.3);
  color: #c7d2fe;
}

[data-theme="dark"] .math-solver-examples button:hover {
  background: rgba(51, 65, 85, 0.95);
  border-color: rgba(129, 140, 248, 0.5);
}

[data-theme="dark"] .math-solver-examples button[aria-pressed="true"] {
  background: #6366f1;
  border-color: #818cf8;
  color: #fff;
}

[data-theme="dark"] .math-solver-plain--hero {
  background: #0f172a;
  border-color: #475569;
  color: #f8fafc;
}

[data-theme="dark"] .math-solver-plain--hero:focus {
  border-color: #818cf8;
  outline-color: rgba(129, 140, 248, 0.45);
}

[data-theme="dark"] .math-solver-kbd-toggle {
  background: #1e293b;
  border-color: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .math-solver-kbd-toggle[aria-expanded="true"] {
  background: rgba(49, 46, 129, 0.35);
  border-color: rgba(129, 140, 248, 0.45);
  color: #c7d2fe;
}

[data-theme="dark"] .math-solver-kbd-panel {
  background: rgba(15, 23, 42, 0.85);
  border-color: #334155;
}

[data-theme="dark"] .math-solver-field-wrap {
  background: #0f172a;
  border-color: #334155;
}

[data-theme="dark"] .math-solver-field-wrap math-field {
  color: #f8fafc;
  background: transparent;
}

[data-theme="dark"] .math-solver-help {
  color: #94a3b8;
}

[data-theme="dark"] .math-solver-error {
  background: rgba(127, 29, 29, 0.35);
  border-color: rgba(248, 113, 113, 0.35);
  color: #fecaca;
}

[data-theme="dark"] .math-solver-error__hint {
  color: #fca5a5;
}

[data-theme="dark"] .math-solver-empty {
  background: rgba(15, 23, 42, 0.85);
  border-color: #334155;
}

[data-theme="dark"] .math-solver-empty__title {
  color: #e2e8f0;
}

[data-theme="dark"] .math-solver-empty__hint {
  color: #94a3b8;
}

[data-theme="dark"] .math-solver-steps-wrap {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.95) 100%);
  border-color: rgba(129, 140, 248, 0.25);
}

[data-theme="dark"] .math-solver-steps-wrap > h3 {
  color: #a5b4fc;
}

[data-theme="dark"] .math-solver-step {
  background: rgba(15, 23, 42, 0.85);
  border-color: rgba(129, 140, 248, 0.25);
}

[data-theme="dark"] .math-solver-step::before {
  background: #6366f1;
}

[data-theme="dark"] .math-solver-step__text {
  color: #e2e8f0;
}

[data-theme="dark"] .math-solver-step__formula {
  color: #f8fafc;
}

[data-theme="dark"] .math-solver-related__label {
  color: #94a3b8;
}

[data-theme="dark"] .math-solver-related__link {
  background: #0f172a;
  border-color: #334155;
  color: #93c5fd;
}

[data-theme="dark"] .math-solver-related__link:hover {
  background: #1e293b;
  border-color: #475569;
}