/* Celerity — stylesheet
   ---------------------
   1. Fonts and design tokens
   2. Base and utilities
   3. Header
   4. Buttons
   5. Shared type (headings, kickers, keycaps)
   6. Hero
   7. Demo — browser frame and recreated new tab
   8. Content sections (how / yours / philosophy / closing)
   9. Footer
   10. Motion (entrances, reveals)
   11. Responsive (960 / 760 / 480)
   12. Reduced motion
*/

/* 1. Fonts and design tokens ------------------------------------------- */

@font-face {
  font-family: "Poppins";
  src: url("assets/poppins-regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Poppins";
  src: url("assets/poppins-medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  --bg: #e9e9e9;
  --surface: #e1e1e1;
  --raised: #f3f3f2;
  --quiet: rgba(17, 17, 17, 0.04);
  --text: #131313;
  --muted: #565656;
  --faint: #8b8b8b;
  --tick: #16a34a;
  --line: rgba(17, 17, 17, 0.12);
  --line-strong: rgba(17, 17, 17, 0.24);
  --ink: #161616;
  --on-ink: #f2f2f2;
  --on-ink-muted: rgba(242, 242, 242, 0.62);
  --frame-strip: #d9d9d8;
  --frame-page: #f4f4f3;
  --header-bg: rgba(233, 233, 233, 0.85);
  --shadow-frame:
    0 40px 90px -32px rgba(0, 0, 0, 0.28),
    0 2px 10px rgba(0, 0, 0, 0.05);
  --shadow-button: 0 10px 26px -12px rgba(0, 0, 0, 0.45);
  --container: 1120px;
  --section-space: clamp(5.5rem, 9vw, 8.75rem);
  --font-sans: "Poppins", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

:root[data-theme="dark"] {
  --bg: #222222;
  --surface: #1d1d1d;
  --raised: #292929;
  --quiet: rgba(255, 255, 255, 0.05);
  --text: #f2f2f2;
  --muted: #a5a5a5;
  --faint: #737373;
  --tick: #4ade80;
  --line: rgba(255, 255, 255, 0.11);
  --line-strong: rgba(255, 255, 255, 0.22);
  --ink: #f2f2f2;
  --on-ink: #1a1a1a;
  --on-ink-muted: rgba(26, 26, 26, 0.6);
  --frame-strip: #1a1a1a;
  --frame-page: #272727;
  --header-bg: rgba(34, 34, 34, 0.85);
  --shadow-frame:
    0 40px 90px -32px rgba(0, 0, 0, 0.75),
    0 2px 10px rgba(0, 0, 0, 0.35);
  --shadow-button: 0 10px 26px -12px rgba(0, 0, 0, 0.8);
}

/* 2. Base and utilities ------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 280ms ease, color 280ms ease;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

::selection {
  background: var(--text);
  color: var(--bg);
}

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.shell {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 180ms ease;
}

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

/* 3. Header ------------------------------------------------------------ */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background-color 240ms ease, border-color 240ms ease,
    backdrop-filter 240ms ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 11px;
  width: max-content;
  border-radius: 8px;
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: auto;
  overflow: visible;
  flex: 0 0 auto;
}

.brand-mark path {
  stroke: currentColor;
  stroke-width: 16;
  stroke-linecap: round;
  fill: none;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
}

.header-nav a {
  position: relative;
  padding-block: 8px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 160ms ease;
}

.header-nav a::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 200ms var(--ease);
}

.header-nav a:hover {
  color: var(--text);
}

.header-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 10px;
}

.theme-toggle {
  display: grid;
  width: 38px;
  height: 38px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: transparent;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  background: var(--quiet);
}

.theme-icon {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.theme-icon--sun,
[data-theme="dark"] .theme-icon--moon {
  display: none;
}

[data-theme="dark"] .theme-icon--sun {
  display: block;
}

/* 4. Buttons ----------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms var(--ease),
    box-shadow 160ms ease;
}

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

.button--ink {
  background: var(--ink);
  color: var(--on-ink);
}

.button--ink:hover {
  box-shadow: var(--shadow-button);
  transform: translateY(-1px);
}

.button--paper {
  background: var(--bg);
  color: var(--text);
}

.button--paper:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, 0.55);
}

.button--compact {
  min-height: 38px;
  padding: 0 16px;
  font-size: 0.82rem;
}

.button--large {
  min-height: 52px;
  padding: 0 24px;
  font-size: 0.95rem;
}

.chrome-glyph {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
}

.button--large .chrome-glyph {
  width: 19px;
  height: 19px;
}

.button-arrow {
  width: 17px;
  height: 17px;
  margin-left: 2px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
  transition: transform 180ms var(--ease);
}

.button:hover .button-arrow {
  transform: translateX(3px);
}

/* 5. Shared type — headings, kickers, keycaps -------------------------- */

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--text);
  font-weight: 500;
}

.kicker {
  margin: 0 0 18px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  min-height: 24px;
  padding: 2px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--raised);
  box-shadow: inset 0 -1.5px 0 var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

/* 6. Hero -------------------------------------------------------------- */

.hero {
  padding: clamp(9.5rem, 14vh, 11.5rem) 0 var(--section-space);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-def {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 6px 14px;
  margin: 0 0 26px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
}

.def-word {
  color: var(--text);
}

.def-ipa,
.def-type {
  color: var(--faint);
}

.def-meaning {
  color: var(--muted);
}

.def-meaning::before {
  content: "— ";
  color: var(--faint);
}

h1 {
  margin-bottom: 26px;
  font-size: clamp(3.4rem, 8vw, 6.2rem);
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.hero-lede {
  max-width: 620px;
  margin: 0 0 38px;
  color: var(--muted);
  font-size: clamp(1.04rem, 1.5vw, 1.17rem);
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-proof {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.proof-tick {
  width: 15px;
  height: 10px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--tick);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 7. Demo — browser frame and recreated new tab ------------------------ */

.demo-shell {
  margin-top: clamp(3.5rem, 6vw, 5rem);
}

.browser {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: var(--frame-page);
  box-shadow: var(--shadow-frame);
}

.browser-top {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 8px 12px 0;
  background: var(--frame-strip);
}

.browser-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 9px 9px 0 0;
  background: var(--frame-page);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 500;
}

.browser-tab-mark {
  width: 13px;
  height: auto;
  overflow: visible;
}

.browser-tab-mark path {
  stroke: currentColor;
  stroke-width: 26;
  stroke-linecap: round;
  fill: none;
}

.browser-tab-ghost {
  padding: 6px 10px;
  color: var(--faint);
  font-size: 0.85rem;
  line-height: 1;
}

.browser-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--frame-page);
}

.toolbar-glyph {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.toolbar-glyph.is-dim {
  opacity: 0.38;
}

.omnibox {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 9px;
  min-width: 0;
  height: 32px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--quiet);
}

.omnibox-glyph {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--faint);
  stroke-width: 1.7;
  stroke-linecap: round;
}

.omnibox-text {
  overflow: hidden;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.omnibox-text:empty::before {
  content: attr(data-placeholder);
  color: var(--faint);
  font-family: var(--font-sans);
}

/* the new-tab surface inside the frame */

.newtab {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: clamp(430px, 44vw, 530px);
  padding: clamp(2rem, 3.5vw, 3rem) 24px 1.5rem;
  transition: opacity 380ms ease;
}

.newtab-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-block: auto;
}

.newtab.is-leaving {
  opacity: 0.3;
}

.newtab-line {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 1.4em;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.newtab-prompt {
  color: var(--faint);
}

.newtab-typed {
  min-height: 1em;
}

.newtab-caret {
  width: 2px;
  height: 1.15em;
  background: var(--text);
  animation: caret-blink 1.1s step-end infinite;
}

.newtab-result {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 0;
  font-size: 0.8rem;
  opacity: 1;
  transition: opacity 200ms ease;
}

.newtab-result[data-state="idle"] {
  opacity: 0;
}

.result-arrow {
  color: var(--faint);
}

.newtab-result strong {
  color: var(--text);
  font-weight: 500;
}

.result-detail {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.result-enter {
  margin-left: 4px;
  transition: background-color 120ms ease, color 120ms ease,
    transform 120ms ease;
}

.result-enter.is-pressed {
  background: var(--text);
  color: var(--frame-page);
  transform: translateY(1px);
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(100%, 760px);
  margin-top: clamp(2.25rem, 4vw, 3.25rem);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
}

.board-cell {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 15px 18px;
  background: var(--frame-page);
}

.board-cell kbd {
  min-width: 29px;
  min-height: 29px;
  font-size: 0.8rem;
  transition: background-color 160ms ease, color 160ms ease,
    border-color 160ms ease;
}

.board-cell span {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.85rem;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 160ms ease;
}

.board-cell.is-hit {
  background: var(--quiet);
}

.board-cell.is-hit kbd {
  border-color: var(--text);
  background: var(--text);
  color: var(--frame-page);
}

.board-cell.is-hit span {
  color: var(--text);
}

.newtab-wordmark {
  margin: 0;
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
  color: var(--faint);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.demo-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.demo-caption p {
  margin: 0;
}

.demo-toggle {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease,
    border-color 160ms ease;
}

.demo-toggle:hover {
  border-color: var(--line-strong);
  background: var(--quiet);
  color: var(--text);
}

/* 8. Content sections -------------------------------------------------- */

.section-head {
  max-width: 700px;
}

#how-title {
  max-width: 21ch;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2.05rem, 3.8vw, 3.15rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.section-lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* how it works */

.how-section {
  padding: var(--section-space) 0;
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.routes {
  margin: clamp(3rem, 5.5vw, 4.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.route {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(170px, 220px) 1fr;
  gap: 24px 40px;
  align-items: baseline;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.route-input {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.route-typed {
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--raised);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1;
  white-space: nowrap;
}

.route h3 {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: -0.015em;
}

.route > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* make it yours */

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

.yours-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(3.5rem, 8vw, 7.5rem);
  align-items: start;
}

.yours-head {
  position: sticky;
  top: 120px;
}

.feature-ledger {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.feature-ledger li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 22px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.feature-icon {
  width: 22px;
  height: 22px;
  margin-top: 3px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-ledger h3 {
  margin-bottom: 8px;
  font-size: 1rem;
  letter-spacing: -0.015em;
}

.feature-ledger p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.feature-ledger kbd {
  min-width: 20px;
  min-height: 20px;
  font-size: 0.66rem;
}

/* philosophy */

.philosophy-section {
  padding: var(--section-space) 0;
  border-top: 1px solid var(--line);
}

.philosophy-statement {
  max-width: 720px;
  margin: clamp(1.5rem, 3vw, 2.25rem) auto 0;
  color: var(--muted);
  font-size: clamp(1.3rem, 2.5vw, 1.85rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.5;
  text-align: center;
}

.philosophy-statement strong {
  color: var(--text);
  font-weight: 500;
}

.tenets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 880px;
  margin: clamp(3.5rem, 6vw, 5rem) auto 0;
  border-top: 1px solid var(--line);
}

.tenets div {
  padding: 28px 28px 0;
  border-right: 1px solid var(--line);
  text-align: center;
}

.tenets div:first-child {
  padding-left: 0;
}

.tenets div:last-child {
  padding-right: 0;
  border-right: 0;
}

.tenets dt {
  margin-bottom: 8px;
  font-size: 0.98rem;
  font-weight: 500;
}

.tenets dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

/* closing */

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

.closing-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: end;
  padding: clamp(2.75rem, 5.5vw, 4.5rem);
  border-radius: 22px;
  background: var(--ink);
  color: var(--on-ink);
}

.closing-kicker {
  margin: 0 0 20px;
  color: var(--on-ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.closing-kicker span {
  color: var(--on-ink-muted);
}

.closing-card h2 {
  max-width: 560px;
  margin-bottom: 16px;
  color: inherit;
  font-size: clamp(1.9rem, 3.4vw, 2.85rem);
}

.closing-copy > p:last-child {
  max-width: 480px;
  margin: 0;
  color: var(--on-ink-muted);
  font-size: 0.95rem;
}

.closing-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.closing-note {
  margin: 0;
  color: var(--on-ink-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

/* 9. Footer ------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 96px;
  gap: 24px;
  color: var(--muted);
  font-size: 0.78rem;
}

.footer-hint {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.footer-hint kbd {
  margin-inline: 2px;
}

.footer-legal {
  justify-self: end;
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* 10. Motion — entrances and reveals ----------------------------------- */

@keyframes caret-blink {
  0%,
  48% {
    opacity: 1;
  }
  49%,
  100% {
    opacity: 0;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-def,
  .hero h1,
  .hero-lede,
  .hero-cta,
  .demo-shell {
    animation: rise 700ms var(--ease) both;
  }

  .hero h1 {
    animation-delay: 60ms;
  }

  .hero-lede {
    animation-delay: 130ms;
  }

  .hero-cta {
    animation-delay: 200ms;
  }

  .demo-shell {
    animation-delay: 300ms;
  }
}

.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}

.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-ready .route:nth-child(2),
.reveal-ready .feature-ledger li:nth-child(2) {
  transition-delay: 70ms;
}

.reveal-ready .route:nth-child(3),
.reveal-ready .feature-ledger li:nth-child(3) {
  transition-delay: 140ms;
}

.reveal-ready .feature-ledger li:nth-child(4) {
  transition-delay: 210ms;
}

/* 11. Responsive — tablet (960) ---------------------------------------- */

@media (max-width: 960px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .header-nav {
    display: none;
  }

  .route {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 26px 0;
  }

  .route h3 {
    margin-top: 4px;
  }

  .yours-layout {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .yours-head {
    position: static;
    max-width: 700px;
  }

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

/* 11. Responsive — mobile (760, 480) ----------------------------------- */

@media (max-width: 760px) {
  .shell {
    width: min(calc(100% - 36px), var(--container));
  }

  .header-inner {
    min-height: 62px;
    gap: 12px;
  }

  .hero {
    padding-top: 8.25rem;
  }

  h1 {
    margin-bottom: 22px;
    font-size: clamp(3rem, 14vw, 4.5rem);
  }

  .hero-lede {
    font-size: 1rem;
  }

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

  .newtab {
    min-height: 0;
    padding-bottom: 1.25rem;
  }

  .newtab-line {
    font-size: clamp(1.25rem, 6vw, 1.6rem);
  }

  .demo-caption p {
    font-size: 0.66rem;
  }

  .tenets {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .tenets div,
  .tenets div:first-child,
  .tenets div:last-child {
    padding: 22px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

  .tenets div:last-child {
    border-bottom: 0;
  }

  .closing-card {
    border-radius: 16px;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    min-height: 84px;
  }

  .footer-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  .brand-name {
    display: none;
  }

  .button--compact {
    padding: 0 13px;
    font-size: 0.78rem;
  }

  .hero {
    padding-top: 7.5rem;
  }

  .board-cell {
    gap: 10px;
    padding: 13px 14px;
  }

  .board-cell span {
    font-size: 0.8rem;
  }

  .button--large {
    width: 100%;
    max-width: 300px;
  }

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

  .closing-card {
    padding: 30px 22px;
  }
}

/* 12. Reduced motion --------------------------------------------------- */

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .newtab-caret {
    animation: none;
    opacity: 1;
  }

  .reveal-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }
}