:root,
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07111f;
  --bg-deep: #020817;
  --bg-end: #030712;
  --text: #f8fafc;
  --muted: #a7b3c7;
  --subtle: #64748b;
  --lead: #cbd5e1;
  --eyebrow: #93c5fd;
  --primary: #38bdf8;
  --primary-strong: #0ea5e9;
  --accent: #a78bfa;
  --accent-strong: #7c3aed;
  --success: #34d399;
  --danger: #fb7185;
  --warning: #fbbf24;
  --grid-line: rgba(148, 163, 184, 0.08);
  --glow-one: rgba(56, 189, 248, 0.18);
  --glow-two: rgba(124, 58, 237, 0.22);
  --header-bg: rgba(2, 8, 23, 0.68);
  --header-border: rgba(148, 163, 184, 0.14);
  --surface: rgba(15, 23, 42, 0.78);
  --surface-strong: rgba(15, 23, 42, 0.96);
  --surface-soft: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.09);
  --border: rgba(148, 163, 184, 0.22);
  --border-soft: rgba(148, 163, 184, 0.16);
  --border-strong: rgba(226, 232, 240, 0.24);
  --chip-bg: rgba(255, 255, 255, 0.065);
  --chip-text: #dbeafe;
  --card-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.045)), rgba(15, 23, 42, 0.86);
  --card-glow: linear-gradient(135deg, rgba(56, 189, 248, 0.34), rgba(167, 139, 250, 0.18), transparent 55%);
  --panel-bg: radial-gradient(circle at 90% 0%, rgba(56, 189, 248, 0.14), transparent 42%), rgba(2, 8, 23, 0.62);
  --panel-bg-soft: rgba(2, 8, 23, 0.36);
  --feature-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.035));
  --muted-card-bg: rgba(15, 23, 42, 0.56);
  --input-text: #eff6ff;
  --placeholder: rgba(203, 213, 225, 0.44);
  --result-text: #ffffff;
  --code-bg: rgba(15, 23, 42, 0.82);
  --code-text: #dbeafe;
  --key-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.095), rgba(255, 255, 255, 0.035));
  --key-hover-bg: linear-gradient(180deg, rgba(125, 211, 252, 0.16), rgba(255, 255, 255, 0.055));
  --key-text: #eef2ff;
  --control-bg: rgba(251, 113, 133, 0.11);
  --control-text: #fecdd3;
  --operator-bg: rgba(14, 165, 233, 0.15);
  --operator-text: #e0f2fe;
  --function-bg: rgba(124, 58, 237, 0.16);
  --function-text: #ede9fe;
  --equal-text: #020817;
  --history-item-bg: rgba(255, 255, 255, 0.045);
  --footer-bg: rgba(2, 8, 23, 0.5);
  --shadow-xl: 0 34px 90px rgba(2, 8, 23, 0.48);
  --shadow-card: 0 24px 70px rgba(2, 8, 23, 0.34);
  --shadow-soft: 0 12px 26px rgba(2, 8, 23, 0.16);
  --radius-lg: 30px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1360px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f8fbff;
  --bg-deep: #eef6ff;
  --bg-end: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --subtle: #64748b;
  --lead: #334155;
  --eyebrow: #2563eb;
  --primary: #0ea5e9;
  --primary-strong: #0284c7;
  --accent: #8b5cf6;
  --accent-strong: #6d28d9;
  --success: #059669;
  --danger: #e11d48;
  --warning: #d97706;
  --grid-line: rgba(15, 23, 42, 0.06);
  --glow-one: rgba(14, 165, 233, 0.18);
  --glow-two: rgba(124, 58, 237, 0.12);
  --header-bg: rgba(255, 255, 255, 0.82);
  --header-border: rgba(15, 23, 42, 0.09);
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: rgba(255, 255, 255, 0.98);
  --surface-soft: rgba(15, 23, 42, 0.045);
  --surface-hover: rgba(14, 165, 233, 0.08);
  --border: rgba(15, 23, 42, 0.13);
  --border-soft: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.18);
  --chip-bg: rgba(255, 255, 255, 0.78);
  --chip-text: #1e3a8a;
  --card-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.82)), rgba(255, 255, 255, 0.92);
  --card-glow: linear-gradient(135deg, rgba(14, 165, 233, 0.22), rgba(139, 92, 246, 0.13), transparent 58%);
  --panel-bg: radial-gradient(circle at 90% 0%, rgba(14, 165, 233, 0.13), transparent 42%), rgba(248, 250, 252, 0.92);
  --panel-bg-soft: rgba(248, 250, 252, 0.86);
  --feature-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 252, 0.82));
  --muted-card-bg: rgba(255, 255, 255, 0.76);
  --input-text: #0f172a;
  --placeholder: rgba(71, 85, 105, 0.55);
  --result-text: #0f172a;
  --code-bg: rgba(226, 232, 240, 0.88);
  --code-text: #1e3a8a;
  --key-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(241, 245, 249, 0.88));
  --key-hover-bg: linear-gradient(180deg, rgba(224, 242, 254, 0.95), rgba(255, 255, 255, 0.92));
  --key-text: #0f172a;
  --control-bg: rgba(244, 63, 94, 0.10);
  --control-text: #be123c;
  --operator-bg: rgba(14, 165, 233, 0.11);
  --operator-text: #075985;
  --function-bg: rgba(124, 58, 237, 0.10);
  --function-text: #5b21b6;
  --equal-text: #ffffff;
  --history-item-bg: rgba(255, 255, 255, 0.70);
  --footer-bg: rgba(255, 255, 255, 0.72);
  --shadow-xl: 0 34px 90px rgba(15, 23, 42, 0.16);
  --shadow-card: 0 22px 58px rgba(15, 23, 42, 0.10);
  --shadow-soft: 0 12px 26px rgba(15, 23, 42, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--glow-one), transparent 34rem),
    radial-gradient(circle at 85% 8%, var(--glow-two), transparent 34rem),
    linear-gradient(180deg, var(--bg), var(--bg-deep) 62%, var(--bg-end) 100%);
  line-height: 1.6;
  transition: background 220ms ease, color 220ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.48;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3 {
  margin-top: 0;
}

code {
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  padding: 0.1rem 0.4rem;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.94em;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin-inline: auto;
}

.section-pad {
  padding-block: clamp(54px, 8vw, 104px);
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-140%);
  border-radius: 999px;
  padding: 10px 16px;
  background: var(--surface-strong);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  font-weight: 800;
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  background:
    radial-gradient(circle at 32% 24%, rgba(255, 255, 255, 0.38), transparent 28%),
    linear-gradient(135deg, var(--primary), var(--accent-strong));
  color: #fff;
  box-shadow: 0 16px 36px rgba(14, 165, 233, 0.22);
  font-size: 1.45rem;
}

.brand-text {
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
}

.nav-actions,
.nav-links,
.theme-toggle {
  display: flex;
  align-items: center;
}

.nav-actions {
  gap: 10px;
}

.nav-links {
  gap: 6px;
}

.nav-links a {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 750;
  transition: color 170ms ease, border-color 170ms ease, background 170ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--border);
  background: var(--surface-hover);
  color: var(--text);
  outline: none;
}

.theme-toggle {
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 11px 8px 8px;
  background: var(--surface-soft);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 850;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(56, 189, 248, 0.48);
  background: var(--surface-hover);
  outline: none;
}

.theme-toggle-icon {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--equal-text);
  font-size: 0.98rem;
  line-height: 1;
}

.theme-toggle-text {
  line-height: 1;
}

.hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(44px, 7vw, 84px);
}

.hero-glow {
  position: absolute;
  z-index: -1;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.36;
}

.hero-glow-one {
  top: 120px;
  left: -120px;
  background: var(--primary);
}

.hero-glow-two {
  right: -110px;
  bottom: 80px;
  background: var(--accent-strong);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.54fr) minmax(740px, 1.46fr);
  gap: clamp(24px, 3vw, 40px);
  align-items: center;
}

.hero-copy {
  max-width: 570px;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--eyebrow);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--text);
  letter-spacing: -0.055em;
  line-height: 1.05;
}

h1 {
  max-width: 11ch;
  margin-bottom: 22px;
  font-size: clamp(3rem, 5vw, 4.75rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.22rem;
}

.hero-lead {
  margin-bottom: 26px;
  color: var(--lead);
  font-size: clamp(1.03rem, 1.35vw, 1.18rem);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-pills span,
.example-chip,
.ghost-button,
.text-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--chip-text);
}

.hero-pills span {
  padding: 9px 13px;
  font-size: 0.9rem;
  font-weight: 800;
}

.calculator-card {
  position: relative;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--card-bg);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(24px);
}

.calculator-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--card-glow);
  transform: translate(12px, 12px);
  filter: blur(24px);
  opacity: 0.55;
}

.calc-header,
.history-head,
.footer-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.calc-label {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.calc-header h2 {
  margin-bottom: 0;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.angle-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  min-width: 138px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  background: var(--surface-soft);
}

.angle-button {
  border: 0;
  border-radius: 999px;
  padding: 9px 13px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 950;
  transition: background 170ms ease, color 170ms ease, box-shadow 170ms ease;
}

.angle-button.is-active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--equal-text);
  box-shadow: 0 10px 26px rgba(56, 189, 248, 0.22);
}

.display-panel {
  margin-top: 22px;
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 15px;
  background: var(--panel-bg);
}

.expression-input {
  width: 100%;
  min-height: 58px;
  border: 0;
  border-bottom: 1px solid var(--border-soft);
  border-radius: 16px 16px 0 0;
  padding: 8px 6px 14px;
  background: transparent;
  color: var(--input-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: clamp(1.18rem, 2.4vw, 1.8rem);
  font-weight: 750;
  outline: none;
}

.expression-input::placeholder {
  color: var(--placeholder);
}

.result-block {
  display: grid;
  gap: 4px;
  padding: 16px 6px 10px;
}

.result-block span {
  color: var(--subtle);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.result-output {
  min-height: 48px;
  overflow-wrap: anywhere;
  color: var(--result-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1.05;
}

.fraction-output {
  margin: -2px 0 0;
  color: var(--primary-strong);
  font-size: 0.96rem;
  font-weight: 780;
  letter-spacing: -0.01em;
}

.fraction-output[hidden] {
  display: none;
}

.calc-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 36px;
  padding-inline: 4px;
}

.ghost-button,
.text-button,
.example-chip,
.key {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.ghost-button {
  padding: 8px 12px;
  font-size: 0.86rem;
  font-weight: 850;
}

.ghost-button:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.ghost-button:hover:not(:disabled),
.ghost-button:focus-visible:not(:disabled),
.text-button:hover,
.text-button:focus-visible,
.example-chip:hover,
.example-chip:focus-visible {
  border-color: rgba(56, 189, 248, 0.48);
  background: rgba(56, 189, 248, 0.12);
  color: var(--text);
  outline: none;
}

.calc-status {
  color: var(--muted);
  font-size: 0.84rem;
  text-align: right;
}

.calc-status.is-error {
  color: var(--danger);
}

.calc-status.is-success {
  color: var(--success);
}

.calculator-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(185px, 0.5fr);
  gap: 16px;
  margin-top: 18px;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 9px;
}

.key {
  min-height: 54px;
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  background: var(--key-bg);
  color: var(--key-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), var(--shadow-soft);
  font-size: 1.02rem;
  font-weight: 900;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

.key:hover,
.key:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(125, 211, 252, 0.44);
  background: var(--key-hover-bg);
  outline: none;
}

.key:active {
  transform: translateY(1px) scale(0.99);
}

.key-control {
  color: var(--control-text);
  background: var(--control-bg);
}

.key-operator {
  color: var(--operator-text);
  background: var(--operator-bg);
}

.key-function,
.key-constant {
  color: var(--function-text);
  background: var(--function-bg);
}

.key-equal {
  grid-row: span 2;
  min-height: 116px;
  border-color: rgba(56, 189, 248, 0.42);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--equal-text);
  font-size: 1.45rem;
  box-shadow: 0 20px 42px rgba(56, 189, 248, 0.26);
}

.history-panel {
  min-height: 100%;
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  padding: 15px;
  background: var(--panel-bg-soft);
}

.history-panel h3 {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: -0.03em;
}

.text-button {
  padding: 6px 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
}

.history-list {
  display: grid;
  gap: 8px;
  max-height: 372px;
  overflow: auto;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.history-item button {
  display: block;
  width: 100%;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 10px;
  background: var(--history-item-bg);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.history-item button:hover,
.history-item button:focus-visible {
  border-color: rgba(56, 189, 248, 0.35);
  outline: none;
}

.history-expression,
.history-result {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.history-expression {
  color: var(--muted);
  font-size: 0.78rem;
}

.history-result {
  margin-top: 2px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 850;
}

.history-empty {
  margin: 18px 0 0;
  color: var(--subtle);
  font-size: 0.9rem;
}

.noscript-message {
  margin: 16px 0 0;
  border: 1px solid rgba(251, 191, 36, 0.28);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(251, 191, 36, 0.08);
  color: var(--warning);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}

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

.examples-section {
  padding-top: 18px;
}

.examples-section p,
.summary-section p,
.content-section p,
.reliability-section p,
.longtail-section p,
.explainer-section p,
.about-section p,
.share-section p,
.faq-section p,
.site-footer p {
  color: var(--lead);
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.example-chip {
  min-height: 48px;
  padding: 10px 12px;
  font-weight: 900;
  text-align: center;
}

.content-section {
  position: relative;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.feature-card,
.info-card,
.faq-section details {
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  background: var(--feature-bg);
  box-shadow: var(--shadow-card);
}

.feature-card {
  padding: 22px;
}

.feature-card p {
  margin-bottom: 0;
}

.feature-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  margin-bottom: 18px;
  border: 1px solid rgba(125, 211, 252, 0.26);
  border-radius: 16px;
  background: rgba(14, 165, 233, 0.10);
  color: var(--primary-strong);
  font-weight: 950;
}

.info-card {
  padding: clamp(22px, 3vw, 32px);
}

.muted-card {
  background: var(--muted-card-bg);
}

.narrow {
  max-width: 860px;
}

.faq-section details {
  padding: 0;
  overflow: hidden;
}

.faq-section details + details {
  margin-top: 12px;
}

.faq-section summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--text);
  font-weight: 900;
  list-style: none;
}

.faq-section summary::-webkit-details-marker {
  display: none;
}

.faq-section summary::after {
  content: "+";
  float: right;
  color: var(--primary);
  font-size: 1.2rem;
}

.faq-section details[open] summary::after {
  content: "−";
}

.faq-section details p {
  margin: 0;
  padding: 0 20px 20px;
}

.site-footer {
  border-top: 1px solid var(--header-border);
  padding-block: 34px;
  background: var(--footer-bg);
}

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

.footer-brand {
  margin-bottom: 12px;
}

.footer-note {
  max-width: 420px;
  color: var(--muted);
}

.footer-note strong {
  color: var(--text);
}


.compact-section {
  padding-top: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(44px, 6vw, 74px);
}

.summary-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: clamp(18px, 3vw, 28px);
  align-items: stretch;
}

.summary-card,
.meta-card,
.trust-card,
.usecase-card,
.verification-card,
.reference-card {
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  background: var(--feature-bg);
  box-shadow: var(--shadow-card);
}

.summary-card,
.meta-card,
.trust-card,
.usecase-card,
.verification-card,
.reference-card {
  padding: clamp(20px, 2.6vw, 30px);
}

.summary-card p,
.meta-card,
.usecase-card p,
.trust-card p,
.verification-card p,
.reference-card p,
.about-section p,
.about-section li,
.reliability-section p {
  color: var(--lead);
}

.summary-card p:last-child,
.usecase-card p:last-child,
.trust-card p:last-child,
.reference-card p:last-child,
.about-section p:last-child {
  margin-bottom: 0;
}

.meta-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.meta-list div {
  display: grid;
  gap: 2px;
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 12px;
}

.meta-list div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.meta-list dt {
  color: var(--subtle);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.meta-list dd {
  margin: 0;
  color: var(--text);
  font-weight: 850;
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.usecase-card {
  min-height: 100%;
}

.usecase-card h3,
.trust-card h3,
.verification-card h3,
.reference-card h3 {
  margin-bottom: 12px;
  font-size: 1.12rem;
}

.section-heading-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: end;
  margin-bottom: 24px;
}

.section-heading-row p:last-child {
  margin-bottom: 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.trust-card {
  background:
    radial-gradient(circle at 100% 0%, rgba(56, 189, 248, 0.12), transparent 42%),
    var(--feature-bg);
}

.verification-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.55fr);
  gap: 18px;
  align-items: stretch;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  background: var(--panel-bg-soft);
}

.verification-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.verification-table th,
.verification-table td {
  border-bottom: 1px solid var(--border-soft);
  padding: 14px 16px;
  text-align: left;
  vertical-align: middle;
}

.verification-table th {
  color: var(--subtle);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.verification-table td {
  color: var(--lead);
  font-weight: 740;
}

.verification-table tbody tr:last-child td {
  border-bottom: 0;
}

.reference-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 0% 0%, rgba(167, 139, 250, 0.14), transparent 46%),
    var(--feature-bg);
}

.citation-box {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  background: var(--panel-bg-soft);
  color: var(--text) !important;
  font-weight: 850;
  overflow-wrap: anywhere;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 18px;
  align-items: stretch;
}

.about-grid .limit-card {
  grid-column: 1 / -1;
}

.check-list,
.limit-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.limit-list li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before,
.limit-list li::before {
  position: absolute;
  left: 0;
  top: 0.05em;
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 950;
}

.check-list li::before {
  content: "✓";
  background: rgba(52, 211, 153, 0.13);
  color: var(--success);
}

.limit-list li::before {
  content: "!";
  background: rgba(251, 191, 36, 0.13);
  color: var(--warning);
}


/* Desktop/tablette : calculatrice horizontale pour éviter un outil trop haut.
   Le format mobile reste inchangé sous 821px. */
@media (min-width: 821px) {
  .hero.section-pad {
    padding-block: clamp(34px, 4.4vw, 62px);
  }

  .calculator-card {
    display: grid;
    grid-template-columns: minmax(205px, 0.72fr) minmax(350px, 1.18fr) minmax(148px, 0.52fr);
    grid-template-areas:
      "calc-head calc-head calc-head"
      "calc-display calc-keypad calc-history";
    gap: 14px;
    padding: clamp(16px, 1.75vw, 24px);
  }

  .calc-header {
    grid-area: calc-head;
  }

  .display-panel {
    grid-area: calc-display;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    margin-top: 0;
    padding: 13px;
  }

  .expression-input {
    min-height: 50px;
    padding-bottom: 12px;
    font-size: clamp(1rem, 1.25vw, 1.35rem);
  }

  .result-block {
    flex: 1;
    align-content: center;
    padding: 13px 6px 9px;
  }

  .result-output {
    min-height: 38px;
    font-size: clamp(1.75rem, 2.6vw, 2.7rem);
  }

  .fraction-output {
    font-size: 0.88rem;
  }

  .calc-toolbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    min-height: 0;
  }

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

  .calculator-shell {
    display: contents;
  }

  .keypad {
    grid-area: calc-keypad;
    align-self: stretch;
    gap: 8px;
    min-width: 0;
  }

  .key {
    min-height: 48px;
    border-radius: 14px;
    font-size: 0.96rem;
  }

  .key-equal {
    min-height: 104px;
  }

  .history-panel {
    grid-area: calc-history;
    min-width: 0;
    min-height: 0;
    padding: 13px;
  }

  .history-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .history-list {
    max-height: 338px;
  }

  .history-empty {
    font-size: 0.84rem;
  }
}

@media (min-width: 981px) and (max-width: 1250px) {
  .hero-layout {
    grid-template-columns: minmax(240px, 0.48fr) minmax(0, 1.52fr);
    gap: clamp(18px, 2.2vw, 26px);
  }

  .hero-copy {
    max-width: 330px;
  }

  h1 {
    max-width: 10.5ch;
    font-size: clamp(2.25rem, 3.9vw, 3.15rem);
  }

  .hero-lead {
    margin-bottom: 18px;
    font-size: 0.96rem;
  }

  .hero-pills {
    gap: 8px;
  }

  .hero-pills span {
    padding: 7px 10px;
    font-size: 0.78rem;
  }

  .calculator-card {
    grid-template-columns: minmax(170px, 0.66fr) minmax(285px, 1.16fr) minmax(112px, 0.44fr);
    gap: 10px;
    padding: 16px;
  }

  .calc-header {
    gap: 10px;
  }

  .calc-header h2 {
    font-size: 1.7rem;
  }

  .calc-label {
    font-size: 0.74rem;
  }

  .angle-switch {
    min-width: 120px;
  }

  .angle-button {
    padding: 7px 10px;
    font-size: 0.76rem;
  }

  .display-panel {
    border-radius: 20px;
    padding: 11px;
  }

  .expression-input {
    min-height: 42px;
    font-size: 1rem;
  }

  .result-output {
    min-height: 32px;
    font-size: 2rem;
  }

  .result-block span {
    font-size: 0.7rem;
  }

  .ghost-button {
    padding: 7px 10px;
    font-size: 0.75rem;
  }

  .calc-status {
    font-size: 0.76rem;
  }

  .keypad {
    gap: 6px;
  }

  .key {
    min-height: 38px;
    border-radius: 11px;
    font-size: 0.82rem;
  }

  .key-equal {
    min-height: 82px;
  }

  .history-panel {
    border-radius: 18px;
    padding: 10px;
  }

  .history-panel h3 {
    font-size: 0.9rem;
  }

  .text-button {
    padding: 5px 8px;
    font-size: 0.68rem;
  }

  .history-list {
    max-height: 260px;
  }
}

@media (max-width: 980px) {
  .hero-layout {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 820px;
  }

  .calculator-card {
    width: 100%;
    max-width: 1040px;
    margin-inline: auto;
  }

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

@media (min-width: 1251px) {
  h1 {
    font-size: clamp(2.8rem, 4.45vw, 4.45rem);
  }

  .hero-lead {
    font-size: clamp(1rem, 1.15vw, 1.12rem);
  }
}

@media (max-width: 980px) {
  .hero-layout {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 13ch;
  }

  .hero-copy {
    max-width: 760px;
  }
}

@media (max-width: 820px) {
  .nav {
    min-height: 66px;
  }

  .brand-text {
    max-width: 170px;
    line-height: 1.08;
  }

  .nav-links {
    display: none;
  }

  .calculator-shell,
  .two-column,
  .feature-grid,
  .summary-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .history-list {
    max-height: 230px;
  }

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

  .footer-layout {
    display: grid;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 20px, var(--container));
  }

  .section-pad {
    padding-block: 48px;
  }

  .hero {
    padding-top: 30px;
  }

  .theme-toggle-text {
    display: none;
  }

  .theme-toggle {
    padding: 8px;
  }

  .calculator-card {
    border-radius: 24px;
    padding: 14px;
  }

  .calc-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .angle-switch {
    width: 100%;
  }

  .display-panel {
    border-radius: 20px;
    padding: 12px;
  }

  .calc-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .keypad {
    gap: 7px;
  }

  .key {
    min-height: 50px;
    border-radius: 13px;
    font-size: 0.95rem;
  }

  .key-equal {
    min-height: 107px;
  }

  .example-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.6rem, 14vw, 4.2rem);
  }

  h2 {
    font-size: clamp(1.8rem, 9vw, 2.5rem);
  }
}

@media (max-width: 1250px) {
  .usecase-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 980px) {
  .summary-grid,
  .section-heading-row,
  .verification-layout,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-grid .limit-card {
    grid-column: auto;
  }

  .section-heading-row {
    align-items: start;
  }
}

@media (max-width: 820px) {
  .usecase-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .summary-card,
  .meta-card,
  .trust-card,
  .usecase-card,
  .verification-card,
  .reference-card {
    border-radius: 20px;
  }
}


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


/* Pages complémentaires, widget, tests et maillage interne */
.nav-links a[aria-current="page"] {
  border-color: var(--border);
  background: var(--surface-hover);
  color: var(--text);
}

.page-hero {
  position: relative;
  overflow: hidden;
}

.page-hero .hero-copy {
  max-width: 850px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 760;
}

.breadcrumbs a {
  color: var(--chip-text);
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(620px, 1.08fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: start;
}

.page-intro-card,
.mini-tool-card,
.code-card,
.test-summary-card {
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--feature-bg);
  box-shadow: var(--shadow-card);
}

.page-intro-card p,
.mini-tool-card p,
.code-card p,
.test-summary-card p {
  color: var(--lead);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.tool-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at 100% 0%, rgba(56, 189, 248, 0.12), transparent 44%),
    var(--feature-bg);
  box-shadow: var(--shadow-card);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.tool-card:hover,
.tool-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.45);
  outline: none;
}

.tool-card-kicker {
  color: var(--eyebrow);
  font-size: 0.74rem;
  font-weight: 950;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tool-card strong {
  color: var(--text);
  font-size: 1.12rem;
  line-height: 1.2;
}

.tool-card span:last-child {
  color: var(--lead);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.content-grid .info-card {
  min-height: 100%;
}

.page-calculator {
  width: 100%;
}

.example-block {
  margin-top: 22px;
}

.code-block {
  position: relative;
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  margin-top: 16px;
  background: var(--panel-bg-soft);
  overflow: hidden;
}

.code-block pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  color: var(--code-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.copy-code-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  margin: 14px 18px 0;
  padding: 8px 12px;
  background: var(--surface-soft);
  color: var(--text);
  cursor: pointer;
  font-weight: 850;
}

.widget-preview {
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 16px;
  background: var(--panel-bg-soft);
  box-shadow: var(--shadow-card);
}

.widget-preview iframe {
  display: block;
  width: 100%;
  min-height: 620px;
  border: 0;
  border-radius: 20px;
  background: transparent;
}

.angle-converter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.angle-field label {
  display: block;
  margin-bottom: 8px;
  color: var(--subtle);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.angle-field input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 16px;
  background: var(--panel-bg-soft);
  color: var(--input-text);
  outline: none;
}

.angle-field input:focus {
  border-color: rgba(56, 189, 248, 0.55);
}

.precision-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 18px;
}

.precision-status {
  color: var(--lead);
  font-weight: 820;
}

.test-pass {
  color: var(--success) !important;
  font-weight: 900;
}

.test-fail {
  color: var(--danger) !important;
  font-weight: 900;
}

.widget-body {
  min-width: 280px;
  min-height: auto;
  background:
    radial-gradient(circle at top left, var(--glow-one), transparent 20rem),
    linear-gradient(180deg, var(--bg), var(--bg-deep));
}

.widget-body::before {
  display: none;
}

.widget-container {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 14px;
}

.widget-container .calculator-card {
  border-radius: 22px;
  box-shadow: none;
}

.widget-container .calculator-shell {
  grid-template-columns: 1fr;
}

.widget-container .history-panel {
  display: none;
}

.widget-credit {
  margin: 10px 4px 0;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.widget-credit a {
  color: var(--chip-text);
  font-weight: 850;
}

@media (max-width: 1250px) {
  .tool-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 980px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .tool-grid,
  .angle-converter-grid {
    grid-template-columns: 1fr;
  }

  .widget-preview iframe {
    min-height: 720px;
  }
}

@media (max-width: 1100px) {
  .nav-links {
    display: none;
  }
}

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


/* Correctifs v7 : menu homogène + héros pages-outils + calculatrice contenue */
body {
  overflow-x: hidden;
}

@media (min-width: 821px) {
  .calculator-card {
    grid-template-columns: minmax(185px, 0.72fr) minmax(320px, 1.18fr) minmax(132px, 0.52fr);
    gap: 12px;
  }
}

/* Les pages-outils ne forcent plus une calculatrice horizontale dans une colonne étroite. */
.page-hero.section-pad {
  padding-top: clamp(34px, 4.8vw, 66px);
  padding-bottom: clamp(34px, 4.8vw, 66px);
}

.page-hero .page-layout {
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: stretch;
}

.page-hero .hero-copy {
  max-width: none;
}

.page-hero .page-calculator {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
}

@media (min-width: 981px) {
  .page-hero .hero-copy {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.48fr);
    grid-template-areas:
      "breadcrumb intro"
      "eyebrow intro"
      "title intro"
      "lead intro"
      "pills intro";
    column-gap: clamp(28px, 5vw, 72px);
    align-items: end;
  }

  .page-hero .breadcrumbs {
    grid-area: breadcrumb;
  }

  .page-hero .hero-copy > .eyebrow {
    grid-area: eyebrow;
  }

  .page-hero #main-title {
    grid-area: title;
  }

  .page-hero .hero-lead {
    grid-area: lead;
    max-width: 74ch;
  }

  .page-hero .hero-pills {
    grid-area: pills;
  }

  .page-hero .page-intro-card {
    grid-area: intro;
    align-self: center;
    margin-top: 0;
  }

  .page-hero h1 {
    max-width: 15ch;
    font-size: clamp(2.85rem, 4.45vw, 4.7rem);
  }
}

@media (min-width: 821px) and (max-width: 980px) {
  .page-hero .page-calculator {
    max-width: 960px;
  }
}

@media (max-width: 980px) {
  .page-hero .page-layout {
    gap: 28px;
  }

  .page-hero .page-intro-card {
    margin-top: 20px;
  }
}

@media (max-width: 820px) {
  .page-hero.section-pad {
    padding-top: 28px;
    padding-bottom: 42px;
  }
}


/* Correctifs v7.1 : sur desktop large, les pages-outils gardent un héros en deux colonnes
   avec une calculatrice horizontale compacte qui ne déborde plus. */
@media (min-width: 1101px) {
  .page-hero .page-layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(560px, 1.08fr);
    gap: clamp(24px, 3.6vw, 56px);
    align-items: center;
  }

  .page-hero .hero-copy {
    display: block;
    max-width: 620px;
  }

  .page-hero .page-intro-card {
    margin-top: 22px;
  }

  .page-hero .page-calculator {
    max-width: 720px;
    margin-inline: 0;
    justify-self: end;
  }

  .page-hero .page-calculator.calculator-card {
    grid-template-columns: minmax(145px, 0.68fr) minmax(260px, 1.22fr) minmax(105px, 0.46fr);
    gap: 8px;
    padding: 14px;
    border-radius: 24px;
  }

  .page-hero .page-calculator .calc-header {
    gap: 10px;
  }

  .page-hero .page-calculator .calc-label {
    font-size: 0.68rem;
  }

  .page-hero .page-calculator .calc-header h2 {
    font-size: clamp(1.24rem, 1.55vw, 1.65rem);
  }

  .page-hero .page-calculator .angle-switch {
    min-width: 108px;
    padding: 3px;
  }

  .page-hero .page-calculator .angle-button {
    padding: 6px 8px;
    font-size: 0.7rem;
  }

  .page-hero .page-calculator .display-panel,
  .page-hero .page-calculator .history-panel {
    border-radius: 18px;
    padding: 10px;
  }

  .page-hero .page-calculator .expression-input {
    min-height: 38px;
    font-size: 0.92rem;
  }

  .page-hero .page-calculator .result-block {
    padding: 10px 5px 8px;
  }

  .page-hero .page-calculator .result-output {
    min-height: 30px;
    font-size: clamp(1.55rem, 2vw, 2rem);
  }

  .page-hero .page-calculator .calc-toolbar {
    gap: 6px;
  }

  .page-hero .page-calculator .ghost-button {
    padding: 6px 8px;
    font-size: 0.66rem;
  }

  .page-hero .page-calculator .calc-status,
  .page-hero .page-calculator .history-empty,
  .page-hero .page-calculator .history-expression {
    font-size: 0.68rem;
  }

  .page-hero .page-calculator .keypad {
    gap: 6px;
  }

  .page-hero .page-calculator .key {
    min-height: 34px;
    border-radius: 10px;
    font-size: 0.76rem;
  }

  .page-hero .page-calculator .key-equal {
    min-height: 74px;
    font-size: 1.1rem;
  }

  .page-hero .page-calculator .history-head {
    gap: 6px;
  }

  .page-hero .page-calculator .history-panel h3 {
    font-size: 0.82rem;
  }

  .page-hero .page-calculator .text-button {
    padding: 4px 7px;
    font-size: 0.62rem;
  }

  .page-hero .page-calculator .history-list {
    max-height: 212px;
  }
}


/* Correctifs v7.2 : carte d’introduction plus compacte dans les héros des pages-outils. */
.page-hero .page-intro-card h2 {
  margin-bottom: 12px;
  font-size: clamp(1.45rem, 2.05vw, 2.15rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.page-hero .page-intro-card p {
  margin-bottom: 0;
  font-size: 0.96rem;
}

@media (min-width: 1101px) {
  .page-hero h1 {
    font-size: clamp(2.7rem, 4.1vw, 4.35rem);
  }

  .page-hero .hero-lead {
    font-size: clamp(0.98rem, 1.1vw, 1.08rem);
  }
}


/* Correctifs v7.3 : éviter les débordements de cartes/code sur mobile. */
.two-column > *,
.page-layout > *,
.content-grid > *,
.tool-grid > *,
.summary-grid > *,
.verification-layout > *,
.about-grid > * {
  min-width: 0;
}

.code-card,
.code-block,
.code-block pre,
.widget-preview,
.widget-preview iframe {
  max-width: 100%;
  min-width: 0;
}

@media (max-width: 560px) {
  .code-card {
    padding: 18px;
  }

  .code-block pre {
    font-size: 0.78rem;
    overflow-wrap: anywhere;
    word-break: break-word;
  }
}

/* Correctifs v8 : pages internes en une seule colonne.
   La home reste inchangée. Les pages-outils gardent la calculatrice sous le texte,
   en largeur 100%, pour éviter tout débordement et obtenir un rendu homogène. */
.page-hero .page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) !important;
  gap: clamp(24px, 4vw, 44px);
  align-items: stretch;
}

.page-hero .hero-copy {
  display: block !important;
  width: 100%;
  max-width: 980px !important;
}

.page-hero .hero-lead {
  max-width: 78ch;
}

.page-hero .page-intro-card,
.page-hero .mini-tool-card {
  width: 100%;
  max-width: 760px;
  margin-top: 22px !important;
}

.page-hero .page-calculator {
  width: 100% !important;
  max-width: none !important;
  margin-inline: 0 !important;
  justify-self: stretch !important;
}

@media (min-width: 821px) {
  .page-hero .page-calculator.calculator-card {
    display: grid;
    grid-template-columns: minmax(225px, 0.74fr) minmax(430px, 1.22fr) minmax(180px, 0.52fr) !important;
    grid-template-areas:
      "calc-head calc-head calc-head"
      "calc-display calc-keypad calc-history";
    gap: clamp(12px, 1.5vw, 18px) !important;
    width: 100%;
    max-width: none !important;
    padding: clamp(16px, 1.75vw, 24px) !important;
    border-radius: var(--radius-lg) !important;
  }

  .page-hero .page-calculator .calc-header {
    gap: 18px !important;
  }

  .page-hero .page-calculator .calc-label {
    font-size: 0.84rem !important;
  }

  .page-hero .page-calculator .calc-header h2 {
    font-size: clamp(1.55rem, 2.2vw, 2.2rem) !important;
  }

  .page-hero .page-calculator .angle-switch {
    min-width: 138px !important;
    padding: 4px !important;
  }

  .page-hero .page-calculator .angle-button {
    padding: 9px 13px !important;
    font-size: 0.84rem !important;
  }

  .page-hero .page-calculator .display-panel {
    border-radius: 24px !important;
    padding: 13px !important;
  }

  .page-hero .page-calculator .history-panel {
    border-radius: 22px !important;
    padding: 15px !important;
  }

  .page-hero .page-calculator .expression-input {
    min-height: 50px !important;
    padding-bottom: 12px !important;
    font-size: clamp(1rem, 1.25vw, 1.35rem) !important;
  }

  .page-hero .page-calculator .result-block {
    padding: 13px 6px 9px !important;
  }

  .page-hero .page-calculator .result-output {
    min-height: 38px !important;
    font-size: clamp(1.75rem, 2.6vw, 2.7rem) !important;
  }

  .page-hero .page-calculator .calc-toolbar {
    gap: 8px !important;
  }

  .page-hero .page-calculator .ghost-button {
    padding: 8px 12px !important;
    font-size: 0.86rem !important;
  }

  .page-hero .page-calculator .calc-status,
  .page-hero .page-calculator .history-empty,
  .page-hero .page-calculator .history-expression {
    font-size: 0.84rem !important;
  }

  .page-hero .page-calculator .keypad {
    gap: 8px !important;
  }

  .page-hero .page-calculator .key {
    min-height: 48px !important;
    border-radius: 14px !important;
    font-size: 0.96rem !important;
  }

  .page-hero .page-calculator .key-equal {
    min-height: 104px !important;
    font-size: 1.35rem !important;
  }

  .page-hero .page-calculator .history-head {
    gap: 10px !important;
  }

  .page-hero .page-calculator .history-panel h3 {
    font-size: 1.02rem !important;
  }

  .page-hero .page-calculator .text-button {
    padding: 6px 10px !important;
    font-size: 0.78rem !important;
  }

  .page-hero .page-calculator .history-list {
    max-height: 338px !important;
  }
}

@media (max-width: 820px) {
  .page-hero .hero-copy {
    max-width: none !important;
  }

  .page-hero .page-calculator {
    max-width: none !important;
  }
}

/* v9 : renforcement SEO/GEO des pages internes */
.geo-section {
  padding-top: clamp(42px, 6vw, 82px);
  padding-bottom: clamp(42px, 6vw, 82px);
}

.geo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.geo-card {
  min-height: 100%;
}

.compact-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--lead);
}

.compact-list li {
  position: relative;
  padding-left: 24px;
}

.compact-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.02em;
  color: var(--success);
  font-weight: 950;
}

.limit-list-mini li::before {
  content: "!";
  color: var(--warning);
}

.geo-citation {
  margin-top: 18px;
}

.reference-table-card {
  padding: 0;
  overflow: hidden;
}

.reference-table-card .table-scroll {
  border: 0;
  border-radius: inherit;
}

@media (max-width: 980px) {
  .geo-grid {
    grid-template-columns: 1fr;
  }
}

/* Correctifs v9 : renforcement SEO/GEO des pages internes */
.geo-summary-section {
  padding-top: clamp(28px, 4vw, 52px);
}

.seo-page-summary .summary-card h2 {
  max-width: 18ch;
}

.seo-page-summary .summary-card strong {
  color: var(--text);
}

.compact-reference-table code {
  color: var(--text);
  font-weight: 900;
}

.feature-check-grid .info-card {
  position: relative;
  padding-top: 24px;
}

.feature-check {
  display: inline-grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(56, 189, 248, 0.38);
  border-radius: 999px;
  margin-bottom: 12px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--chip-text);
  font-weight: 950;
}

.warning-card {
  background:
    radial-gradient(circle at 100% 0%, rgba(251, 191, 36, 0.12), transparent 46%),
    var(--feature-bg);
}

.clean-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 1.15rem;
  color: var(--lead);
}

.clean-list li::marker {
  color: var(--chip-text);
}

@media (max-width: 980px) {
  .seo-page-summary {
    grid-template-columns: 1fr;
  }

  .section-heading-row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .verification-layout {
    grid-template-columns: 1fr;
  }
}

/* Correctifs v9 : pages internes renforcées, héros en une seule colonne, sections GEO/IA. */
.page-hero .hero-copy {
  display: block !important;
  max-width: 920px;
}

.page-hero .page-intro-card {
  max-width: 760px;
}

.page-hero .mini-tool-card,
.page-hero .widget-preview,
.page-hero .page-calculator {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
}

.page-hero .mini-tool-card {
  margin-top: 0;
}

.page-hero h1 {
  max-width: 16ch;
}

.page-support-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(16px, 3vw, 28px);
}

.page-support-grid .trust-card {
  min-height: 100%;
}

.reference-card .citation-box a {
  color: var(--text);
  overflow-wrap: anywhere;
}

.reliability-section .verification-card {
  overflow: hidden;
}

@media (max-width: 980px) {
  .page-support-grid,
  .verification-layout {
    grid-template-columns: 1fr;
  }

  .page-hero .hero-copy {
    max-width: 760px;
  }
}

/* Correctifs v9.1 : lisibilité des blocs GEO/IA et listes de limites sur les pages internes. */
.ai-summary-card .citation-box {
  margin-top: 18px;
}

.meta-card .check-list,
.meta-card .limit-list {
  margin-top: 12px;
}

.stacked-heading {
  margin-top: 26px;
}

.cite-tool-card {
  min-height: 100%;
}

.reference-table-card {
  margin-top: 18px;
}

.reference-table-card .verification-table {
  min-width: 620px;
}

@media (max-width: 820px) {
  .summary-section.compact-section {
    padding-top: 36px;
  }

  .reference-table-card .verification-table {
    min-width: 560px;
  }
}

/* v9.2 : sécurité anti-débordement sur pages internes renforcées. */
html,
body {
  overflow-x: clip;
}

@supports not (overflow-x: clip) {
  body {
    overflow-x: hidden;
  }
}

.page-hero .calculator-card,
.page-hero .calculator-shell,
.page-hero .keypad,
.summary-grid,
.verification-layout,
.content-grid,
.tool-grid {
  min-width: 0;
}

.page-hero .calculator-card {
  max-width: 100% !important;
}

.stacked-heading {
  color: var(--text);
}