.frac-page {
  --frac-blue-1: #0b63e6;
  --frac-blue-2: #1f8cff;
  --frac-blue-3: #dff0ff;
  --frac-ink: #203864;
  --frac-ink-soft: #4f6796;
  --frac-soft: #f4f8ff;
  --frac-line: #cfe0f7;
  --frac-line-strong: #b7cfee;
  --frac-shadow: 0 22px 46px rgba(44, 88, 175, 0.12);
  --frac-shadow-soft: 0 10px 24px rgba(36, 91, 180, 0.08);
  color: var(--frac-ink);
}

.frac-page,
.frac-page * {
  box-sizing: border-box;
}

.frac-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 30px;
  border: 1px solid #d4e3f8;
  background:
    radial-gradient(circle at top left, rgba(160, 211, 255, 0.56), transparent 28%),
    radial-gradient(circle at bottom left, rgba(201, 219, 255, 0.42), transparent 24%),
    linear-gradient(180deg, #f9fbff 0%, #f3f7ff 52%, #eef4ff 100%);
  box-shadow: var(--frac-shadow);
  padding: 16px;
}

.frac-wrap::before,
.frac-wrap::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 999px;
}

.frac-wrap::before {
  width: 320px;
  height: 320px;
  left: -140px;
  top: -90px;
  background: radial-gradient(circle, rgba(103, 187, 255, 0.18), transparent 66%);
}

.frac-wrap::after {
  width: 420px;
  height: 220px;
  right: -90px;
  top: 30px;
  background: radial-gradient(circle, rgba(185, 213, 255, 0.24), transparent 68%);
}

.frac-hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 2px 2px 10px;
}

.frac-hero-icon {
  width: 92px;
  aspect-ratio: 1 / 1;
  border-radius: 22px;
  background: linear-gradient(180deg, #31a3ff 0%, #0b63e6 90%);
  border: 2px solid rgba(255,255,255,0.72);
  box-shadow:
    inset 0 2px 0 rgba(255,255,255,0.45),
    inset 0 -8px 16px rgba(6, 70, 163, 0.32),
    0 8px 18px rgba(11, 99, 230, 0.18),
    0 0 0 4px rgba(137, 212, 255, 0.12);
  position: relative;
  transform: rotate(-3deg);
  display: grid;
  place-items: center;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr auto 1fr;
  gap: 2px;
  color: #fff;
  text-shadow: 0 5px 14px rgba(0,0,0,0.2);
}

.frac-hero-icon::before,
.frac-hero-icon::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 30px;
  border: 1px solid rgba(137, 212, 255, 0.42);
}

.frac-hero-icon::after {
  inset: -14px;
  border-color: rgba(137, 212, 255, 0.14);
}

.frac-hero-icon span {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
}

.frac-hero-icon i {
  width: 44px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,0.96);
  display: block;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.frac-hero-copy h1 {
  margin: 0;
  font-size: clamp(1.72rem, 3.3vw, 3rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: #0b63e6;
  text-shadow: 0 5px 16px rgba(29, 92, 184, 0.12);
}

.frac-hero-copy p {
  max-width: 720px;
  margin: 4px 0 0;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--frac-ink-soft);
  font-weight: 700;
}

.frac-badges,
.frac-quick-links,
.frac-tool-links,
.frac-related-links,
.frac-equivalents,
.frac-bars,
.frac-subtabs,
.frac-form-actions,
.frac-footer-nav,
.frac-highlight-grid,
.frac-side-list,
.frac-keypad,
.frac-use-grid,
.frac-faq-grid,
.frac-ref-grid,
.frac-summary-grid,
.frac-formula-grid,
.frac-example-grid,
.frac-mini-grid,
.frac-main-grid,
.frac-result-grid,
.frac-side-stack {
  display: grid;
  gap: 14px;
}

.frac-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.frac-badge,
.frac-quick-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.74);
  border: 1px solid #d2e3fb;
  font-size: 0.92rem;
  font-weight: 700;
  color: #305082;
  box-shadow: 0 10px 22px rgba(46, 97, 191, 0.08);
  text-decoration: none;
}

.frac-quick-links {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 14px;
}

.frac-shell {
  position: relative;
  z-index: 1;
}

.frac-tabs {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  border: 1px solid #b9d0ee;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(244, 248, 255, 0.92), rgba(232, 240, 255, 0.92));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.72), 0 12px 24px rgba(52, 98, 184, 0.06);
}

.frac-tab {
  appearance: none;
  border: 0;
  background: transparent;
  color: #355585;
  min-height: 58px;
  padding: 0 18px;
  font-size: 1rem;
  font-weight: 800;
  border-right: 1px solid #c8daf2;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, box-shadow .18s ease;
  flex: 1 1 150px;
}

.frac-tab:last-child { border-right: 0; }

.frac-tab.is-active {
  color: #fff;
  background: linear-gradient(180deg, #168cff 0%, #0a61df 100%);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,0.08);
}

.frac-panel {
  margin-top: 10px;
  border-radius: 24px;
  border: 1px solid #d1e1f7;
  background: rgba(255,255,255,0.56);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.84);
  padding: 18px;
}

.frac-subtabs {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.frac-subtab {
  appearance: none;
  border: 1px solid #cddcf2;
  background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
  color: #395988;
  padding: 12px 18px;
  border-radius: 16px;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: 0 10px 22px rgba(52, 98, 184, 0.08);
  cursor: pointer;
}

.frac-subtab.is-active {
  color: #fff;
  border-color: #0f74ef;
  background: linear-gradient(180deg, #2297ff 0%, #0a61df 100%);
}

.frac-main-grid,
.frac-result-grid,
.frac-summary-grid,
.frac-ref-grid {
  grid-template-columns: minmax(0, 1.95fr) minmax(280px, 0.85fr);
}

.frac-card,
.frac-side-card,
.frac-content-card,
.frac-table-card,
.frac-faq-card,
.frac-reference-card,
.frac-example-card,
.frac-use-card,
.frac-footer-nav {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(246, 249, 255, 0.98));
  border: 1px solid rgba(200, 218, 242, 0.98);
  border-radius: 24px;
  box-shadow: var(--frac-shadow-soft);
}

.frac-card,
.frac-side-card,
.frac-content-card,
.frac-table-card,
.frac-faq-card,
.frac-reference-card,
.frac-example-card,
.frac-use-card {
  padding: 18px;
}

.frac-card-head,
.frac-section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.frac-card-head h2,
.frac-card-head h3,
.frac-section-head h2,
.frac-side-card h3,
.frac-reference-card h2,
.frac-table-card h2,
.frac-content-card h2,
.frac-faq-card h3,
.frac-use-card h3,
.frac-example-card strong {
  margin: 0;
  color: #224577;
}

.frac-card-head h3 {
  font-size: 1rem;
}

.frac-card-head p,
.frac-section-head p,
.frac-side-card p,
.frac-reference-card p,
.frac-content-card p,
.frac-table-card p,
.frac-faq-card p,
.frac-use-card p,
.frac-example-card ol,
.frac-side-mini-note,
.frac-inline-note,
.frac-result-note {
  margin: 6px 0 0;
  color: var(--frac-ink-soft);
  line-height: 1.6;
}

.frac-alert {
  display: none;
  padding: 12px 14px;
  margin-top: 14px;
  border-radius: 16px;
  font-weight: 700;
  background: #fff5f5;
  color: #b42318;
  border: 1px solid #f3c6c6;
}

.frac-alert.is-visible { display: block; }

.frac-fields {
  margin-top: 16px;
  display: grid;
  gap: 14px;
}

.frac-field-group {
  display: grid;
  gap: 10px;
}

.frac-field-grid {
  display: grid;
  gap: 10px;
}

.frac-field-grid.frac-field-grid-fraction {
  grid-template-columns: 88px minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
}

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

.frac-field-grid.frac-field-grid-single {
  grid-template-columns: minmax(0, 1fr);
}

.frac-field,
.frac-input-shell,
.frac-select-shell {
  display: grid;
  gap: 6px;
}

.frac-field label,
.frac-input-shell label,
.frac-select-shell label {
  font-size: 0.9rem;
  font-weight: 800;
  color: #365585;
}

.frac-field input,
.frac-field select,
.frac-input-shell input,
.frac-select-shell select {
  width: 100%;
  min-height: 54px;
  border-radius: 16px;
  border: 1px solid #c9d9f2;
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
  padding: 0 14px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--frac-ink);
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.7);
}

.frac-field input:focus,
.frac-field select:focus,
.frac-input-shell input:focus,
.frac-select-shell select:focus {
  outline: 2px solid rgba(11, 99, 230, 0.18);
  border-color: #0b63e6;
}

.frac-fraction-box {
  position: relative;
  display: grid;
  gap: 10px;
}

.frac-fraction-box::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% + 13px);
  height: 2px;
  border-radius: 999px;
  background: #b9d0ee;
  pointer-events: none;
}

.frac-math-symbols {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 6px;
}

.frac-math-btn {
  appearance: none;
  border: 1px solid #cddcf2;
  background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
  color: #395988;
  padding: 12px 18px;
  border-radius: 16px;
  font-weight: 900;
  font-size: 1.2rem;
  line-height: 1;
  box-shadow: 0 10px 22px rgba(52, 98, 184, 0.08);
  cursor: pointer;
}

.frac-math-btn.is-active {
  color: #fff;
  border-color: #0f74ef;
  background: linear-gradient(180deg, #2297ff 0%, #0a61df 100%);
}

.frac-form-actions {
  display: flex;
  flex-wrap: wrap;
  margin-top: 14px;
}

.frac-btn,
.frac-link-btn,
.frac-tool-links button,
.frac-related-links a,
.frac-share-btn {
  appearance: none;
  border: 1px solid #c8daf2;
  text-decoration: none;
  border-radius: 16px;
  min-height: 52px;
  padding: 0 18px;
  font-weight: 800;
  font-size: 0.97rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
}

.frac-btn-primary,
.frac-share-btn,
.frac-tool-links button:hover,
.frac-related-links a:hover {
  color: #fff;
  border-color: #0f74ef;
  background: linear-gradient(180deg, #2297ff 0%, #0a61df 100%);
  box-shadow: 0 14px 26px rgba(12, 96, 224, 0.18);
}

.frac-btn-secondary,
.frac-link-btn,
.frac-tool-links button,
.frac-related-links a {
  color: #365585;
  background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
}

.frac-tool-links,
.frac-related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.frac-link-btn {
  width: 100%;
}

.frac-side-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}

.frac-side-list li {
  display: flex;
}

.frac-side-list button {
  width: 100%;
  text-align: left;
  border: 1px solid #d1e1f7;
  background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
  border-radius: 16px;
  padding: 12px 14px;
  font-weight: 700;
  color: #355585;
  cursor: pointer;
}

.frac-equivalents {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.frac-equivalents span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 74px;
  min-height: 48px;
  padding: 0 10px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(34, 151, 255, 0.16), rgba(10, 97, 223, 0.05));
  border: 1px solid #c7daf5;
  font-weight: 800;
  color: #24487a;
}

.frac-bars {
  display: flex;
  grid-template-columns: none;
  gap: 8px;
  margin-top: 8px;
}

.frac-bars span {
  flex: 1 1 0;
  min-height: 18px;
  border-radius: 999px;
  background: linear-gradient(180deg, #dcecff, #b9d7ff);
  border: 1px solid #c3d8f5;
}

.frac-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.frac-result-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  color: #214375;
}

.frac-result-check {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(180deg, #4adf8f 0%, #21b361 100%);
  color: #fff;
}

.frac-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #355585;
  font-weight: 800;
}

.frac-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.frac-switch-slider {
  width: 54px;
  height: 32px;
  border-radius: 999px;
  background: linear-gradient(180deg, #2297ff 0%, #0a61df 100%);
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.14);
}

.frac-switch-slider::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 26px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.14);
  transition: left .2s ease;
}

.frac-switch input:not(:checked) + .frac-switch-slider {
  background: linear-gradient(180deg, #d6e6fb 0%, #c7d8f4 100%);
}

.frac-switch input:not(:checked) + .frac-switch-slider::before {
  left: 4px;
}

.frac-result-box {
  margin-top: 14px;
}

.frac-result-line {
  margin: 0;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 900;
  color: #23487b;
}

.frac-result-value {
  color: var(--frac-blue-1);
}

.frac-highlight-grid {
  margin-top: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.frac-highlight {
  padding: 14px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(34, 151, 255, 0.12), rgba(10, 97, 223, 0.04));
  border: 1px solid #d0e0f7;
}

.frac-highlight span {
  display: block;
  font-size: 0.86rem;
  color: var(--frac-ink-soft);
  font-weight: 700;
}

.frac-highlight strong {
  display: block;
  margin-top: 6px;
  color: #23487b;
  font-size: 1rem;
}

.frac-formula-box {
  margin-top: 14px;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid #d0e0f7;
  background: linear-gradient(180deg, #ffffff 0%, #f5f9ff 100%);
}

.frac-formula-box h3,
.frac-example-top span {
  margin: 0;
  color: #0b63e6;
}

.frac-formula-list,
.frac-step-list,
.frac-reference-list,
.frac-example-card ol {
  padding-left: 20px;
}

.frac-formula-list li,
.frac-step-list li,
.frac-reference-list li,
.frac-example-card li {
  margin-top: 8px;
  color: #355585;
  line-height: 1.6;
}

.frac-keypad {
  margin-top: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.frac-keypad button {
  min-height: 58px;
  border-radius: 16px;
  border: 1px solid #0f74ef;
  background: linear-gradient(180deg, #2297ff 0%, #0a61df 100%);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(12, 96, 224, 0.16);
}

.frac-keypad button.is-wide {
  grid-column: span 3;
  font-size: 1rem;
}

.frac-footer-nav {
  display: flex;
  flex-wrap: wrap;
  padding: 12px;
  justify-content: space-between;
}

.frac-footer-link,
.frac-share-btn {
  flex: 1 1 160px;
}

.frac-footer-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 58px;
  border-radius: 18px;
  text-decoration: none;
  color: #355585;
  border: 1px solid transparent;
  font-weight: 800;
}

.frac-footer-link:hover {
  border-color: #d0e0f7;
  background: linear-gradient(180deg, #ffffff 0%, #f5f9ff 100%);
}

.frac-footer-link svg,
.frac-share-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.9;
  fill: none;
}

.frac-section {
  position: relative;
  z-index: 1;
  margin-top: 18px;
}

.frac-mini-grid,
.frac-formula-grid,
.frac-example-grid,
.frac-use-grid,
.frac-faq-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.frac-mini-card,
.frac-formula-chip {
  padding: 14px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(34, 151, 255, 0.12), rgba(10, 97, 223, 0.04));
  border: 1px solid #d0e0f7;
}

.frac-mini-card strong,
.frac-example-top span,
.frac-formula-chip {
  display: block;
  font-weight: 900;
}

.frac-mini-card span {
  display: block;
  margin-top: 8px;
  color: var(--frac-ink-soft);
  line-height: 1.55;
}

.frac-formula-chip {
  margin-top: 14px;
  color: #0b63e6;
  font-size: 1.02rem;
}

.frac-example-card {
  display: grid;
  gap: 12px;
}

.frac-example-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #d8e5f6;
}

.frac-table-wrap {
  overflow-x: auto;
  margin-top: 14px;
}

.frac-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.frac-table th,
.frac-table td {
  padding: 13px 14px;
  text-align: left;
  border-bottom: 1px solid #d8e5f6;
}

.frac-table th {
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: #55709d;
}

.frac-table td {
  font-weight: 700;
  color: #26497b;
}

.frac-faq-card h3,
.frac-use-card h3 {
  font-size: 1rem;
}

.frac-reference-list {
  margin: 12px 0 0;
}

.frac-reference-list a,
.frac-related-links a,
.frac-link-btn,
.frac-quick-links a {
  color: inherit;
}

.frac-reference-list a:hover,
.frac-link-btn:hover,
.frac-quick-links a:hover {
  color: #0b63e6;
}

@media (max-width: 1040px) {
  .frac-main-grid,
  .frac-result-grid,
  .frac-summary-grid,
  .frac-ref-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 780px) {
  .frac-wrap {
    padding: 12px;
    border-radius: 24px;
  }

  .frac-hero {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 12px;
  }

  .frac-hero-icon {
    width: 74px;
    border-radius: 18px;
  }

  .frac-hero-icon span { font-size: 1.55rem; }
  .frac-hero-icon i { width: 34px; }

  .frac-badges {
    gap: 8px;
  }

  .frac-badge,
  .frac-quick-links a {
    width: 100%;
    justify-content: center;
  }

  .frac-quick-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .frac-tab {
    min-height: 52px;
    padding: 0 12px;
    font-size: 0.94rem;
    flex-basis: calc(50% - 1px);
  }

  .frac-panel,
  .frac-card,
  .frac-side-card,
  .frac-content-card,
  .frac-table-card,
  .frac-faq-card,
  .frac-reference-card,
  .frac-example-card,
  .frac-use-card {
    padding: 16px;
    border-radius: 20px;
  }

  .frac-field-grid.frac-field-grid-fraction,
  .frac-field-grid.frac-field-grid-double,
  .frac-mini-grid,
  .frac-formula-grid,
  .frac-example-grid,
  .frac-use-grid,
  .frac-faq-grid,
  .frac-tool-links,
  .frac-related-links,
  .frac-highlight-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .frac-fraction-box::before {
    top: calc(50% + 12px);
  }

  .frac-footer-nav {
    gap: 10px;
  }

  .frac-footer-link,
  .frac-share-btn {
    flex-basis: calc(50% - 5px);
  }
}

@media (max-width: 560px) {
  .frac-quick-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .frac-tabs {
    border-radius: 16px;
  }

  .frac-tab {
    flex-basis: 100%;
    min-height: 48px;
  }

  .frac-subtabs,
  .frac-math-symbols,
  .frac-form-actions,
  .frac-footer-nav {
    gap: 10px;
  }

  .frac-subtab,
  .frac-math-btn,
  .frac-btn,
  .frac-footer-link,
  .frac-share-btn,
  .frac-link-btn,
  .frac-tool-links button,
  .frac-related-links a {
    width: 100%;
  }

  .frac-result-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .frac-highlight strong {
    font-size: 0.95rem;
  }
}


/* Compact mobile refinements */
.frac-main-grid {
  grid-template-areas:
    "tool side"
    "result side";
  align-items: start;
}

.frac-tool-card {
  grid-area: tool;
}

.frac-result-card {
  grid-area: result;
}

.frac-side-stack {
  grid-area: side;
  align-self: start;
}

@media (max-width: 780px) {
  .frac-wrap {
    padding: 10px;
    border-radius: 22px;
  }

  .frac-hero-copy h1 {
    font-size: 1.9rem;
  }

  .frac-hero-copy p,
  .frac-inline-note,
  .frac-result-note,
  .frac-card-head p,
  .frac-side-card p,
  .frac-side-mini-note {
    font-size: 0.84rem;
    line-height: 1.45;
  }

  .frac-badges {
    margin-top: 10px;
    gap: 8px;
  }

  .frac-badge {
    width: auto;
    justify-content: flex-start;
    padding: 7px 11px;
    font-size: 0.78rem;
  }

  .frac-quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .frac-quick-links a {
    width: 100%;
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .frac-main-grid {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "tool"
      "result"
      "side";
    gap: 12px;
  }

  .frac-panel,
  .frac-card,
  .frac-side-card,
  .frac-content-card,
  .frac-table-card,
  .frac-faq-card,
  .frac-reference-card,
  .frac-example-card,
  .frac-use-card {
    padding: 14px;
    border-radius: 18px;
  }

  .frac-subtabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 12px;
  }

  .frac-subtab,
  .frac-math-btn {
    width: 100%;
    padding: 10px 12px;
    font-size: 0.88rem;
    border-radius: 14px;
  }

  .frac-field-grid.frac-field-grid-fraction {
    grid-template-columns: 78px minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px;
  }

  .frac-field-grid.frac-field-grid-double,
  .frac-tool-links,
  .frac-related-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .frac-field input,
  .frac-field select,
  .frac-input-shell input,
  .frac-select-shell select {
    min-height: 46px;
    border-radius: 14px;
    padding: 0 12px;
    font-size: 0.95rem;
  }

  .frac-field label,
  .frac-input-shell label,
  .frac-select-shell label {
    font-size: 0.8rem;
  }

  .frac-form-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .frac-btn,
  .frac-link-btn,
  .frac-tool-links button,
  .frac-related-links a,
  .frac-share-btn,
  .frac-footer-link {
    min-height: 46px;
    border-radius: 14px;
    padding: 0 12px;
    font-size: 0.88rem;
  }

  .frac-result-line {
    font-size: 1.08rem;
  }

  .frac-highlight-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .frac-highlight {
    padding: 10px;
    border-radius: 14px;
  }

  .frac-highlight span {
    font-size: 0.72rem;
  }

  .frac-highlight strong {
    font-size: 0.84rem;
  }

  .frac-formula-box {
    margin-top: 10px;
    padding: 12px;
    border-radius: 16px;
  }

  .frac-footer-nav {
    gap: 8px;
    padding: 10px;
  }

  .frac-footer-link,
  .frac-share-btn {
    width: auto;
    flex-basis: calc(50% - 4px);
  }
}

@media (max-width: 560px) {
  .frac-wrap {
    padding: 8px;
    border-radius: 18px;
  }

  .frac-hero {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 10px;
    padding-bottom: 8px;
  }

  .frac-hero-icon {
    width: 58px;
    border-radius: 16px;
  }

  .frac-hero-icon span {
    font-size: 1.25rem;
  }

  .frac-hero-icon i {
    width: 28px;
    height: 3px;
  }

  .frac-hero-copy h1 {
    font-size: 1.55rem;
  }

  .frac-hero-copy p {
    margin-top: 2px;
    font-size: 0.76rem;
  }

  .frac-badges {
    margin-top: 8px;
    gap: 6px;
  }

  .frac-badge {
    padding: 6px 9px;
    font-size: 0.72rem;
  }

  .frac-quick-links {
    margin: 8px 0 10px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .frac-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-radius: 14px;
  }

  .frac-tab {
    flex: none;
    min-height: 40px;
    padding: 0 8px;
    font-size: 0.8rem;
  }

  .frac-subtabs,
  .frac-math-symbols {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

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

  .frac-panel,
  .frac-card,
  .frac-side-card,
  .frac-content-card,
  .frac-table-card,
  .frac-faq-card,
  .frac-reference-card,
  .frac-example-card,
  .frac-use-card {
    padding: 12px;
    border-radius: 16px;
  }

  .frac-fields {
    margin-top: 12px;
    gap: 10px;
  }

  .frac-field-grid.frac-field-grid-fraction {
    grid-template-columns: 70px minmax(0, 1fr) minmax(0, 1fr);
  }

  .frac-field input,
  .frac-field select,
  .frac-input-shell input,
  .frac-select-shell select {
    min-height: 42px;
    padding: 0 10px;
    font-size: 0.9rem;
  }

  .frac-field label,
  .frac-input-shell label,
  .frac-select-shell label {
    font-size: 0.76rem;
  }

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

  .frac-btn,
  .frac-link-btn,
  .frac-tool-links button,
  .frac-related-links a,
  .frac-share-btn,
  .frac-footer-link {
    min-height: 42px;
    font-size: 0.84rem;
    padding: 0 10px;
  }

  .frac-footer-link,
  .frac-share-btn {
    width: auto;
  }

  .frac-result-head {
    align-items: center;
    flex-direction: row;
  }

  .frac-result-title {
    gap: 8px;
    font-size: 0.94rem;
  }

  .frac-result-check {
    width: 28px;
    height: 28px;
  }

  .frac-switch {
    gap: 8px;
    font-size: 0.82rem;
  }

  .frac-switch-slider {
    width: 46px;
    height: 28px;
  }

  .frac-switch-slider::before {
    top: 4px;
    left: 22px;
    width: 20px;
    height: 20px;
  }

  .frac-switch input:not(:checked) + .frac-switch-slider::before {
    left: 4px;
  }

  .frac-result-line {
    font-size: 1rem;
  }

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

  .frac-highlight span {
    font-size: 0.68rem;
  }

  .frac-highlight strong {
    font-size: 0.8rem;
  }

  .frac-formula-box {
    padding: 10px;
  }

  .frac-tool-links,
  .frac-related-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}