:root {
  --color-primary: #6c63ff;
  --color-secondary: #ff6584;
  --color-accent: #43e97b;
  --color-bg: #0f0f1a;
  --color-surface: #1a1a2e;
  --color-surface-2: #16213e;
  --color-surface-3: rgba(255, 255, 255, 0.04);
  --color-text: #e8e8f0;
  --color-text-muted: #9ea1c3;
  --color-border: #2a2a4a;
  --color-shadow: rgba(108, 99, 255, 0.15);
  --color-danger: #ff7b7b;
  --color-success: #43e97b;
  --radius-xl: 1rem;
  --radius-lg: 0.75rem;
  --radius-md: 0.5rem;
  --shadow-lg: 0 8px 32px rgba(108, 99, 255, 0.15);
  --shadow-soft: 0 24px 48px rgba(8, 10, 30, 0.32);
  --content-width: min(1200px, calc(100vw - 2rem));
  --font-base: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  --site-gradient:
    radial-gradient(circle at top left, rgba(108, 99, 255, 0.28), transparent 30%),
    radial-gradient(circle at top right, rgba(255, 101, 132, 0.18), transparent 24%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
}

@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #f5f7ff;
    --color-surface: rgba(255, 255, 255, 0.92);
    --color-surface-2: #eef2ff;
    --color-surface-3: rgba(15, 15, 26, 0.03);
    --color-text: #15162a;
    --color-text-muted: #5b6080;
    --color-border: #d6ddff;
    --color-shadow: rgba(93, 85, 198, 0.16);
    --shadow-soft: 0 24px 48px rgba(74, 86, 150, 0.15);
  }
}

:root[data-theme="dark"] {
  --color-bg: #0f0f1a;
  --color-surface: #1a1a2e;
  --color-surface-2: #16213e;
  --color-surface-3: rgba(255, 255, 255, 0.04);
  --color-text: #e8e8f0;
  --color-text-muted: #9ea1c3;
  --color-border: #2a2a4a;
  --color-shadow: rgba(108, 99, 255, 0.15);
  --shadow-soft: 0 24px 48px rgba(8, 10, 30, 0.32);
}

:root[data-theme="light"] {
  --color-bg: #f5f7ff;
  --color-surface: rgba(255, 255, 255, 0.92);
  --color-surface-2: #eef2ff;
  --color-surface-3: rgba(15, 15, 26, 0.03);
  --color-text: #15162a;
  --color-text-muted: #5b6080;
  --color-border: #d6ddff;
  --color-shadow: rgba(93, 85, 198, 0.16);
  --shadow-soft: 0 24px 48px rgba(74, 86, 150, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-base);
  color: var(--color-text);
  background:
    var(--site-gradient),
    linear-gradient(180deg, var(--color-bg) 0%, color-mix(in srgb, var(--color-bg) 85%, #091126) 100%);
  line-height: 1.6;
}

img,
svg,
canvas {
  max-width: 100%;
  display: block;
}

button,
input,
select {
  font: inherit;
}

a {
  color: inherit;
}

code {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
}

.skip-link:focus {
  top: 1rem;
}

.site-shell {
  position: relative;
  overflow: clip;
}

.site-shell::before,
.site-shell::after {
  content: "";
  position: fixed;
  inset: auto;
  pointer-events: none;
  z-index: -1;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.35;
}

.site-shell::before {
  top: 4rem;
  left: -3rem;
  background: rgba(108, 99, 255, 0.36);
}

.site-shell::after {
  right: -2rem;
  bottom: 10rem;
  background: rgba(255, 101, 132, 0.22);
}

.section,
.site-header,
.site-footer,
.noscript-banner {
  width: var(--content-width);
  margin-inline: auto;
}

.section {
  padding: 2rem 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding-top: 0.5rem;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.9rem;
  background: linear-gradient(145deg, rgba(108, 99, 255, 0.22), rgba(67, 233, 123, 0.12));
  color: var(--color-text);
  flex: 0 0 auto;
}

.brand-mark svg {
  width: 1.7rem;
  height: 1.7rem;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-copy strong {
  font-size: 0.95rem;
}

.brand-copy span {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a,
.ghost-button,
.text-button,
.mode-tab,
.faq-question,
.formula-card {
  transition:
    background-color 160ms ease,
    color 160ms ease,
    border-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.nav-links a {
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  color: var(--color-text-muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-surface-3);
}

.hero-section {
  padding-top: 1.75rem;
}

.hero-copy {
  max-width: 58rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-secondary);
}

h1,
h2,
h3 {
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 4.4vw, 3.9rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  max-width: 18ch;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

p {
  margin: 0;
}

.hero-lead,
.section-copy p {
  margin-top: 0.75rem;
  max-width: 65ch;
  font-size: 1.04rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.primary-button,
.secondary-button,
.ghost-button,
.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.75rem 1.05rem;
  border-radius: 0.85rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 60%, var(--color-secondary)));
  box-shadow: 0 16px 30px color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.primary-button:hover,
.primary-button:focus-visible {
  transform: translateY(-1px);
}

.secondary-button {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-surface-2) 72%, transparent);
  border-color: color-mix(in srgb, var(--color-border) 80%, transparent);
}

.secondary-button:hover,
.secondary-button:focus-visible,
.ghost-button:hover,
.ghost-button:focus-visible,
.mode-tab:hover,
.mode-tab:focus-visible,
.formula-card:hover,
.formula-card:focus-visible,
.faq-question:hover,
.faq-question:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.ghost-button {
  color: var(--color-text);
  background: transparent;
  border-color: var(--color-border);
}

.text-button {
  color: var(--color-text-muted);
  background: transparent;
  padding-inline: 0;
}

.text-button:hover,
.text-button:focus-visible {
  color: var(--color-text);
}

.trust-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.trust-signals li {
  padding: 0.55rem 0.8rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 76%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
  color: var(--color-text-muted);
  font-size: 0.88rem;
  white-space: nowrap;
}

.trust-signals li::before {
  content: "\2713";
  margin-right: 0.55rem;
  color: var(--color-accent);
}

.hero-grid,
.proof-grid,
.advanced-grid,
.formula-grid,
.examples-grid,
.applications-grid {
  display: grid;
  gap: 1.2rem;
}

.hero-grid {
  margin-top: 1.7rem;
}

.glass-card {
  position: relative;
  padding: 1.2rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 78%, transparent);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 92%, transparent), color-mix(in srgb, var(--color-surface-2) 92%, transparent));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.glass-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.06), transparent 22%, transparent 80%, rgba(255, 255, 255, 0.03));
  opacity: 0.8;
}

.panel-header,
.history-header,
.tool-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.panel-header h2 {
  margin-top: 0.3rem;
  font-size: clamp(1.4rem, 2vw, 1.85rem);
}

.tab-row {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mode-tab {
  min-height: 2.5rem;
  padding: 0.68rem 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-muted);
}

.mode-tab.is-active {
  background: color-mix(in srgb, var(--color-primary) 18%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 50%, var(--color-border));
  color: var(--color-text);
}

.mode-formula {
  margin-top: 1rem;
  color: var(--color-text-muted);
}

.input-grid,
.control-row,
.result-actions,
.legend,
.canvas-controls,
.inline-actions,
.mini-form,
.tag-row,
.checkbox-row,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.input-grid {
  margin-top: 1rem;
  display: grid;
  gap: 0.9rem;
}

.verify-grid {
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.field-card,
.inline-control,
.mini-form label {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.field-card {
  position: relative;
  padding: 0.9rem;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface-2) 70%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-border) 78%, transparent);
}

.field-label {
  font-weight: 700;
}

.field-shell {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0 0.2rem 0 0;
  border: 1px solid var(--color-border);
  border-radius: 0.8rem;
  background: color-mix(in srgb, var(--color-bg) 45%, transparent);
}

input[type="number"],
select {
  width: 100%;
  min-height: 2.9rem;
  padding: 0.78rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 0.8rem;
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-bg) 45%, transparent);
}

.field-shell input {
  border: 0;
  background: transparent;
}

.clear-button {
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-surface) 70%, transparent);
  color: var(--color-text-muted);
  cursor: pointer;
}

input:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-primary) 55%, white);
  outline-offset: 2px;
}

.field-error {
  min-height: 1.1rem;
  font-size: 0.83rem;
  color: var(--color-danger);
}

.field-card.is-invalid,
input.is-invalid,
select.is-invalid {
  border-color: color-mix(in srgb, var(--color-danger) 55%, var(--color-border));
}

.field-card.is-highlighted {
  border-color: color-mix(in srgb, var(--color-primary) 55%, var(--color-border));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-primary) 28%, transparent);
}

.control-row {
  align-items: flex-end;
  margin-top: 1rem;
}

.inline-control {
  flex: 1 1 10rem;
}

.inline-actions {
  flex: 1 1 auto;
  justify-content: flex-end;
}

.result-panel {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 12%, transparent), color-mix(in srgb, var(--color-accent) 6%, transparent)),
    color-mix(in srgb, var(--color-surface) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 18%, var(--color-border));
}

.result-value,
.mini-result {
  font-family: var(--font-mono);
}

.result-value {
  margin-top: 0.3rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.result-status,
.canvas-caption,
.mini-result,
.tool-head p,
.history-list,
.solver-hint,
.formula-card span,
.application-card p,
.example-card p {
  color: var(--color-text-muted);
}

.result-panel.is-success {
  animation: pulse-success 520ms ease;
}

.result-panel.is-error {
  animation: shake-error 360ms ease;
}

.steps-card,
.history-card,
.derivation-card,
.proof-card,
.tool-card {
  background: color-mix(in srgb, var(--color-surface-2) 66%, transparent);
}

.steps-card {
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 78%, transparent);
  border-radius: var(--radius-lg);
}

.steps-card summary {
  cursor: pointer;
  font-weight: 700;
}

.step-list,
.history-list,
.bullet-list {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.step-list li {
  opacity: 0;
  transform: translateY(0.5rem);
  animation: none;
}

.step-list li.is-visible {
  animation: type-in 0.55s steps(36, end) forwards;
  animation-delay: calc(var(--step-delay, 0) * 80ms);
}

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

.history-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
}

.history-list li:last-child {
  border-bottom: 0;
}

.history-item-button {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  color: inherit;
  cursor: pointer;
}

.legend {
  align-items: center;
  justify-content: flex-end;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.swatch {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 999px;
}

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

.side-b {
  background: var(--color-secondary);
}

.side-c {
  background: var(--color-accent);
}

#triangle-canvas,
#coordinate-canvas,
#distance3d-canvas {
  width: 100%;
  aspect-ratio: 1 / 1;
  margin-top: 1rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-bg) 45%, transparent), transparent),
    color-mix(in srgb, var(--color-surface) 60%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
}

#coordinate-canvas,
#distance3d-canvas {
  aspect-ratio: 18 / 13;
}

.canvas-controls {
  margin-top: 1rem;
}

.proof-grid,
.advanced-grid,
.formula-grid,
.examples-grid,
.applications-grid,
.faq-list {
  margin-top: 1.5rem;
}

.proof-card,
.tool-card,
.example-card,
.application-card,
.formula-card,
.faq-item {
  padding: 1.2rem;
}

.advanced-grid,
.examples-grid,
.applications-grid,
.formula-grid {
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.mini-form {
  margin-top: 1rem;
  align-items: flex-end;
}

.mini-form label {
  flex: 1 1 7rem;
}

.mini-result,
.solver-hint {
  margin-top: 0.8rem;
}

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

.checkbox-row input {
  width: auto;
  min-height: 0;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
}

.triples-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

.triples-table th,
.triples-table td {
  padding: 0.7rem 0.55rem;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  text-align: left;
}

.triples-table tbody tr:hover {
  background: color-mix(in srgb, var(--color-surface-3) 70%, transparent);
}

.formula-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  text-align: left;
  border: 1px solid color-mix(in srgb, var(--color-border) 78%, transparent);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent),
    color-mix(in srgb, var(--color-surface) 88%, transparent);
  cursor: pointer;
}

.formula-name {
  color: var(--color-secondary);
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.formula-card strong {
  font-size: 1.45rem;
  font-family: var(--font-mono);
}

.example-card,
.application-card {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.example-card {
  grid-template-columns: auto 1fr;
  align-items: start;
}

.example-card .secondary-button {
  grid-column: 1 / -1;
  justify-self: start;
}

.example-icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 0.9rem;
  background: linear-gradient(145deg, rgba(108, 99, 255, 0.18), rgba(255, 101, 132, 0.12));
  font-size: 1.4rem;
}

.tag-row span,
.mini-math {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-surface-3) 70%, transparent);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.applications-grid .application-card {
  cursor: pointer;
}

.application-card:hover,
.application-card:focus-within {
  transform: translateY(-2px);
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-secondary);
}

.faq-question[aria-expanded="true"]::after {
  content: "-";
}

.faq-answer {
  padding-top: 1rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 2.5rem 0 4rem;
  color: var(--color-text-muted);
}

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

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

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-text);
}

.page-main {
  padding-bottom: 1rem;
}

.about-hero {
  position: relative;
  overflow: hidden;
  padding: 4.25rem 0 3rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-bg) 88%, transparent), color-mix(in srgb, var(--color-surface) 90%, transparent)),
    radial-gradient(circle at center, rgba(108, 99, 255, 0.16), transparent 42%);
}

.about-hero::before {
  content: "a^2 + b^2 = c^2";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: clamp(4.5rem, 12vw, 8rem);
  letter-spacing: -0.06em;
  color: var(--color-primary);
  opacity: 0.05;
  white-space: nowrap;
  pointer-events: none;
}

.privacy-hero,
.terms-hero {
  position: relative;
  overflow: hidden;
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-bg) 90%, transparent), color-mix(in srgb, var(--color-surface) 92%, transparent)),
    radial-gradient(circle at center, rgba(108, 99, 255, 0.14), transparent 44%);
}

.privacy-hero::before {
  content: "a^2 + b^2 = c^2";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: clamp(4rem, 11vw, 7rem);
  letter-spacing: -0.05em;
  color: var(--color-primary);
  opacity: 0.04;
  white-space: nowrap;
  pointer-events: none;
}

.terms-hero::before {
  content: "\00A7 Terms";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: clamp(4rem, 11vw, 7rem);
  letter-spacing: -0.05em;
  color: var(--color-primary);
  opacity: 0.04;
  white-space: nowrap;
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  z-index: 1;
  width: var(--content-width);
  margin-inline: auto;
  text-align: center;
}

.subpage-title {
  max-width: 18ch;
  margin-inline: auto;
}

.subpage-lead {
  max-width: 48rem;
  margin: 0.9rem auto 0;
  font-size: 1.08rem;
  color: var(--color-text-muted);
}

.badge {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--color-primary) 35%, transparent);
  border-radius: 999px;
  background: rgba(108, 99, 255, 0.14);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.privacy-meta,
.terms-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem 1.4rem;
  margin-top: 1.2rem;
  color: var(--color-text-muted);
}

.privacy-meta p,
.terms-meta p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
}

.privacy-meta a,
.terms-meta a {
  color: var(--color-text);
  text-decoration: none;
}

.privacy-meta a:hover,
.privacy-meta a:focus-visible,
.terms-meta a:hover,
.terms-meta a:focus-visible {
  color: var(--color-primary);
}

.mission-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  align-items: center;
}

.mission-illustration,
.narrow-card,
.policy-layout {
  max-width: 960px;
  margin-inline: auto;
}

.mission-illustration {
  display: grid;
  place-items: center;
}

.mission-illustration svg {
  width: min(100%, 420px);
}

.mission-copy p + p,
.narrow-card p + p,
.policy-block p + p {
  margin-top: 1rem;
}

.feature-cards,
.commitment-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.feature-card {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(108, 99, 255, 0.2);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.9rem;
  color: var(--color-primary);
  background: linear-gradient(145deg, rgba(108, 99, 255, 0.16), rgba(255, 101, 132, 0.1));
}

.feature-icon svg {
  width: 1.4rem;
  height: 1.4rem;
}

.narrow-card {
  display: grid;
  gap: 1rem;
  max-width: 720px;
}

.contact-stack,
.contact-form {
  display: grid;
  gap: 0.95rem;
}

.contact-method {
  display: grid;
  gap: 0.3rem;
  padding-top: 0.7rem;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 72%, transparent);
}

.contact-method:first-of-type {
  margin-top: 0.35rem;
}

.contact-label,
.policy-updated {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
}

.contact-link {
  color: var(--color-text);
  text-decoration: none;
  word-break: break-word;
}

.contact-link:hover,
.contact-link:focus-visible {
  color: var(--color-primary);
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 2.9rem;
  padding: 0.78rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 0.8rem;
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-bg) 45%, transparent);
}

.contact-form textarea {
  resize: vertical;
  min-height: 8.5rem;
}

.contact-form input:focus-visible,
.contact-form select:focus-visible,
.contact-form textarea:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-primary) 55%, white);
  outline-offset: 2px;
}

.fine-print,
.contact-status,
.policy-layout p,
.feature-card p,
.commitment-card p {
  color: var(--color-text-muted);
}

.fine-print a {
  color: var(--color-text);
}

.commitment-band {
  padding: 1.4rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 12%, transparent), color-mix(in srgb, var(--color-surface) 88%, transparent)),
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 92%, transparent), color-mix(in srgb, var(--color-surface-2) 92%, transparent));
}

.center-copy {
  text-align: center;
}

.commitment-grid {
  margin-top: 1.2rem;
}

.commitment-card {
  display: grid;
  gap: 0.8rem;
  padding: 1rem 0.75rem;
}

.quick-links-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.acceptance-banner {
  margin: 0 0 2rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(67, 233, 123, 0.25);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 0.9rem 0.9rem 0;
  background: rgba(67, 233, 123, 0.08);
  color: var(--color-text);
}

.policy-layout {
  display: grid;
  gap: 0.35rem;
  max-width: 860px;
}

.policy-block {
  padding-top: 1.35rem;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 72%, transparent);
}

.policy-block:first-of-type {
  margin-top: 0.55rem;
}

.toc,
.privacy-contact-card,
.terms-contact-card {
  position: relative;
}

.toc {
  margin-bottom: 2.5rem;
  padding: 1.5rem 1.6rem;
}

.toc h2 {
  margin-bottom: 1rem;
  font-size: 1.35rem;
}

.toc ol {
  columns: 2;
  column-gap: 2rem;
  margin: 0;
  padding-left: 1.25rem;
}

.toc li {
  break-inside: avoid;
  margin-bottom: 0.55rem;
  color: var(--color-text-muted);
}

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

.toc a:hover,
.toc a:focus-visible {
  color: var(--color-text);
  text-decoration: underline;
}

.toc a[aria-current="true"] {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}

.privacy-content,
.terms-content {
  max-width: 800px;
  margin-inline: auto;
  padding-bottom: 5rem;
}

.privacy-section,
.terms-section {
  scroll-margin-top: 6rem;
}

.privacy-section + .privacy-section,
.terms-section + .terms-section {
  margin-top: 3rem;
}

.privacy-content h2,
.terms-content h2 {
  margin: 0 0 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 72%, transparent);
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
}

.privacy-content h3,
.terms-content h3 {
  margin: 1.75rem 0 0.65rem;
  font-size: 1rem;
}

.privacy-content p,
.privacy-content ul,
.privacy-content ol,
.terms-content p,
.terms-content ul,
.terms-content ol {
  color: var(--color-text-muted);
}

.privacy-content p + p,
.terms-content p + p {
  margin-top: 1rem;
}

.privacy-content ul,
.privacy-content ol,
.terms-content ul,
.terms-content ol {
  margin: 0.75rem 0 0;
  padding-left: 1.35rem;
}

.privacy-content li + li,
.terms-content li + li {
  margin-top: 0.45rem;
}

.privacy-content a,
.terms-content a {
  color: var(--color-primary);
}

.privacy-content .toc h2 {
  margin-bottom: 1rem;
  padding-bottom: 0;
  border-bottom: 0;
  font-size: 1.35rem;
}

.privacy-content .toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.terms-content .toc h2 {
  margin-bottom: 1rem;
  padding-bottom: 0;
  border-bottom: 0;
  font-size: 1.35rem;
}

.terms-content .toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.privacy-notice,
.terms-notice {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(108, 99, 255, 0.24);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 0.9rem 0.9rem 0;
  background: rgba(108, 99, 255, 0.08);
  color: var(--color-text);
}

.privacy-notice.warning,
.terms-notice.warning {
  border-color: rgba(255, 101, 132, 0.24);
  border-left-color: var(--color-secondary);
  background: rgba(255, 101, 132, 0.08);
}

.terms-notice.info {
  border-color: rgba(67, 233, 123, 0.25);
  border-left-color: var(--color-accent);
  background: rgba(67, 233, 123, 0.08);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 72%, transparent);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
}

.privacy-table {
  width: 100%;
  min-width: 40rem;
  border-collapse: collapse;
}

.privacy-table th,
.privacy-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 68%, transparent);
  color: var(--color-text-muted);
}

.privacy-table th {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-surface-2) 75%, transparent);
  font-size: 0.9rem;
}

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

.privacy-contact-card,
.terms-contact-card {
  margin: 1.5rem 0;
  padding: 1.6rem;
  border: 1px solid color-mix(in srgb, var(--color-border) 72%, transparent);
  border-radius: 1rem;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 92%, transparent), color-mix(in srgb, var(--color-surface-2) 92%, transparent));
  box-shadow: var(--shadow-soft);
}

.terms-contact-card {
  margin-top: 3rem;
}

.contact-page .contact-hero {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-bg) 90%, transparent), color-mix(in srgb, var(--color-surface) 92%, transparent)),
    radial-gradient(circle at center, rgba(108, 99, 255, 0.14), transparent 44%);
}

.contact-page .contact-hero::before {
  content: "\2709";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(7rem, 20vw, 12.5rem);
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.03;
  pointer-events: none;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem 2rem;
  margin-top: 2rem;
}

.quick-link-button {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  border: 0;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.quick-link-icon {
  display: inline-grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 50%;
  background: rgba(108, 99, 255, 0.15);
  color: var(--color-primary);
  transition: transform 160ms ease, border-color 160ms ease, color 160ms ease;
}

.quick-link-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.quick-link-button span:last-child {
  font-size: 0.78rem;
  font-weight: 500;
}

.quick-link-button:hover .quick-link-icon,
.quick-link-button:focus-visible .quick-link-icon {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--color-primary) 60%, transparent);
}

.contact-page .contact-main {
  padding: 0;
}

.contact-page .contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 3rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.contact-info-card,
.contact-topics,
.contact-form-card {
  border: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  box-shadow: var(--shadow-soft);
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: 1rem;
}

.contact-info-card + .contact-info-card,
.contact-topics {
  margin-top: 1rem;
}

.contact-info-icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.65rem;
}

.contact-info-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.contact-info-icon.is-primary {
  background: rgba(108, 99, 255, 0.12);
  color: var(--color-primary);
}

.contact-info-icon.is-secondary {
  background: rgba(255, 101, 132, 0.12);
  color: var(--color-secondary);
}

.contact-info-icon.is-accent {
  background: rgba(67, 233, 123, 0.12);
  color: var(--color-accent);
}

.contact-info-card h2,
.contact-topics h2 {
  margin: 0;
  font-size: 0.95rem;
}

.contact-form-card h2 {
  margin: 0;
  font-size: 1.25rem;
}

.contact-info-card p {
  margin-top: 0.3rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.contact-info-strong {
  color: var(--color-text) !important;
  font-weight: 600;
}

.contact-topics {
  padding: 1.5rem;
  border-radius: 1rem;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.topic-tag {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.topic-tag:hover,
.topic-tag:focus-visible,
.topic-tag.is-active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.contact-form-card {
  position: relative;
  padding: 2.25rem;
  border-radius: 1.25rem;
}

.contact-form-lead {
  margin-top: 0.5rem;
  margin-bottom: 1.75rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.contact-form-note {
  margin-bottom: 1.25rem;
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

.contact-page-form {
  display: grid;
  gap: 0;
}

.contact-form-fields {
  display: grid;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
}

.required {
  color: var(--color-secondary);
}

.contact-page-form input,
.contact-page-form select,
.contact-page-form textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: 0.95rem;
  transition: border-color 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

.contact-page-form textarea {
  min-height: 10rem;
  resize: vertical;
}

.contact-page-form input:focus-visible,
.contact-page-form select:focus-visible,
.contact-page-form textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.contact-page-form input.is-error,
.contact-page-form select.is-error,
.contact-page-form textarea.is-error {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(255, 101, 132, 0.15);
}

.message-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.4rem;
}

.char-count {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.char-count.is-warning {
  color: #f59e0b;
}

.char-count.is-limit {
  color: var(--color-secondary);
}

.form-error-msg {
  display: none;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--color-secondary);
}

.form-error-msg.is-visible {
  display: block;
}

.consent-group {
  margin-bottom: 1.5rem;
}

.consent-label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  color: var(--color-text-muted);
}

.consent-label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-ui {
  position: relative;
  width: 1.2rem;
  height: 1.2rem;
  margin-top: 0.1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.35rem;
  background: var(--color-surface-2);
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.consent-label input:focus-visible + .checkbox-ui {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.consent-label input:checked + .checkbox-ui {
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.consent-label input:checked + .checkbox-ui::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 0.4rem;
  height: 0.7rem;
  margin: auto;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg) translate(-1px, -1px);
}

.consent-group.has-error .checkbox-ui {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(255, 101, 132, 0.15);
}

.consent-label a {
  color: var(--color-text);
}

.submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.9rem 1.25rem;
  border: 0;
  border-radius: 0.75rem;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 160ms ease, transform 160ms ease;
}

.submit-btn:hover,
.submit-btn:focus-visible {
  opacity: 0.92;
  transform: translateY(-1px);
}

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

.submit-btn[disabled],
.submit-btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.button-spinner {
  display: none;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
}

.contact-page-form.is-loading .button-spinner {
  display: inline-block;
  animation: spin 700ms linear infinite;
}

.form-success,
.form-error {
  display: none;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1.25rem 1.5rem;
  border-radius: 0.75rem;
}

.form-success {
  border: 1px solid rgba(67, 233, 123, 0.3);
  background: rgba(67, 233, 123, 0.1);
}

.form-error {
  border: 1px solid rgba(255, 101, 132, 0.3);
  background: rgba(255, 101, 132, 0.1);
}

.form-success.is-visible,
.form-error.is-visible {
  display: grid;
}

.status-icon {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
}

.status-icon svg {
  width: 1.4rem;
  height: 1.4rem;
}

.success-icon {
  color: var(--color-accent);
}

.error-icon {
  color: var(--color-secondary);
}

.form-success h3,
.form-error h3 {
  margin: 0;
  font-size: 1rem;
}

.form-success p,
.form-error p {
  margin-top: 0.35rem;
  color: var(--color-text-muted);
}

.success-email {
  color: var(--color-text);
  font-weight: 600;
}

.form-reset-link {
  margin-top: 0.35rem;
}

.contact-page .faq-section {
  padding: 4rem 0;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
}

.contact-support-copy {
  padding-top: 0;
}

.contact-page .faq-section .center-copy {
  width: var(--content-width);
  margin: 0 auto;
}

.contact-page .faq-list {
  width: min(720px, calc(100vw - 2rem));
  margin: 2.5rem auto 0;
}

.contact-page .faq-item {
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  overflow: hidden;
  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
}

.contact-page .faq-item.active {
  border-color: color-mix(in srgb, var(--color-primary) 60%, var(--color-border));
}

.contact-page .faq-question {
  padding: 1.1rem 1.25rem;
  background: transparent;
}

.contact-page .faq-question::after {
  content: none;
}

.contact-page .faq-question:hover,
.contact-page .faq-question:focus-visible,
.contact-page .faq-item.active .faq-question {
  background: rgba(108, 99, 255, 0.05);
  box-shadow: none;
  transform: none;
}

.contact-page .faq-question span:first-child {
  flex: 1;
}

.faq-question-icon {
  display: inline-grid;
  place-items: center;
  color: var(--color-primary);
  transition: transform 200ms ease;
}

.faq-question-icon svg {
  width: 1.1rem;
  height: 1.1rem;
}

.contact-page .faq-item.active .faq-question-icon {
  transform: rotate(180deg);
}

.contact-page .faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.25rem;
  transition: max-height 200ms ease, padding 200ms ease;
}

.contact-page .faq-item.active .faq-answer {
  padding: 0 1.25rem 1.1rem;
}

.contact-page .faq-answer p {
  color: var(--color-text-muted);
}

.contact-card-grid {
  display: grid;
  gap: 1rem;
}

.contact-card-item {
  display: grid;
  gap: 0.35rem;
  text-align: center;
}

.contact-card-item .feature-icon {
  margin-inline: auto;
}

.footer-copyright {
  color: var(--color-text-muted);
}

.footer-note {
  margin-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

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

.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 2rem;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--color-primary) 60%, var(--color-border));
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: var(--shadow-soft);
  color: #fff;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 160ms ease, transform 160ms ease;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: color-mix(in srgb, var(--color-primary) 82%, black);
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 1.15rem;
  height: 1.15rem;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.noscript-banner {
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 123, 123, 0.12);
  color: var(--color-text);
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  max-width: min(22rem, calc(100vw - 2rem));
  padding: 0.85rem 1rem;
  border: 1px solid color-mix(in srgb, var(--color-primary) 35%, var(--color-border));
  border-radius: 0.9rem;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translateY(1rem);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes pulse-success {
  0% {
    box-shadow: 0 0 0 0 rgba(67, 233, 123, 0.45);
  }
  100% {
    box-shadow: 0 0 0 18px rgba(67, 233, 123, 0);
  }
}

@keyframes shake-error {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-4px);
  }
  40% {
    transform: translateX(4px);
  }
  60% {
    transform: translateX(-3px);
  }
  80% {
    transform: translateX(3px);
  }
}

@keyframes type-in {
  0% {
    opacity: 0;
    transform: translateY(0.5rem);
    clip-path: inset(0 100% 0 0);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    clip-path: inset(0 0 0 0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

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

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

@media (min-width: 1024px) {
  .section {
    padding: 3rem 0;
  }

  .hero-section {
    padding-top: 1.25rem;
  }

  .trust-signals {
    flex-wrap: nowrap;
    gap: 0.45rem;
  }

  .trust-signals li {
    padding: 0.5rem 0.7rem;
    font-size: 0.84rem;
  }

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

  .calculator-panel {
    min-height: 100%;
  }

  .hero-grid {
    margin-top: 1.5rem;
  }
}

@media (max-width: 767px) {
  .site-header {
    padding-top: 0.35rem;
  }

  .top-nav,
  .panel-header,
  .history-header {
    flex-direction: column;
    align-items: stretch;
  }

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

  .brand-copy span {
    display: none;
  }

  .hero-section {
    padding-top: 1.2rem;
  }

  .hero-actions,
  .control-row,
  .inline-actions,
  .canvas-controls {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button,
  .ghost-button {
    width: 100%;
  }

  .contact-form .primary-button,
  .quick-links-row .secondary-button {
    width: 100%;
  }

  .toc {
    padding: 1.25rem 1.1rem;
  }

  .toc ol {
    columns: 1;
  }

  .privacy-table {
    min-width: 34rem;
  }

  .quick-links {
    gap: 1rem;
  }

  .quick-link-button {
    width: calc(50% - 0.5rem);
  }

  .contact-page .contact-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2.5rem 1rem;
  }

  .contact-form-card {
    padding: 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .message-meta {
    flex-direction: column;
    gap: 0.35rem;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1.25rem;
  }

  .result-panel {
    position: sticky;
    bottom: 1rem;
    z-index: 5;
  }
}

@media (min-width: 768px) {
  .mission-grid,
  .contact-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 2rem;
  }

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

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

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

@media (min-width: 1100px) {
  .feature-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .ghost-button {
    display: none !important;
  }

  .contact-page .quick-links,
  .contact-page .contact-topics,
  .contact-page .contact-form-card,
  .contact-page .faq-section {
    display: none !important;
  }

  .privacy-hero,
  .terms-hero,
  .contact-page .contact-hero,
  .section {
    width: 100%;
    padding: 0;
    background: none;
    border: 0;
  }

  .toc,
  .privacy-contact-card,
  .contact-info-card,
  .glass-card {
    box-shadow: none;
    border-color: #ccc;
    background: none;
  }
}