/* Classboard launch site. Tokens, type and rules from docs/site/BRIEF.md. */

/* ------------------------------------------------------------ Tokens */
:root {
  color-scheme: light dark;

  /* Light */
  --c-bg: #f7f5f1;
  --c-bg-2: #efebe4;
  --c-surface: #ffffff;
  --c-surface-2: #f1eee8;
  --c-line: #e3dfd6;
  --c-line-strong: #cfc9bd;
  --c-ink: #17181a;
  --c-ink-2: #4b4d53;
  --c-muted: #64666c;
  --c-accent: #f04a1a;
  --c-accent-ui: #d63d10;
  --c-accent-text: #b9340c;
  --c-accent-soft: #fdeae2;
  --c-on-accent: #ffffff;
  --c-success: #1d8347;
  --c-success-soft: #e3f4e9;
  --c-focus: #2b6be8;

  /* The dark "ink" band used by "Make it yours" in both modes */
  --c-band: #1c1917;
  --c-band-2: #26221f;
  --c-band-ink: #f2f1ee;
  --c-band-muted: #a8a29b;
  --c-band-accent: #ff6a3d;

  --shadow-ink: 30 22 16;
  --shadow-sm:
    0 1px 2px rgb(var(--shadow-ink) / 0.05),
    0 1px 1px rgb(var(--shadow-ink) / 0.03);
  --shadow-md:
    0 2px 4px rgb(var(--shadow-ink) / 0.04),
    0 12px 28px -10px rgb(var(--shadow-ink) / 0.16);
  --shadow-lg:
    0 8px 16px -8px rgb(var(--shadow-ink) / 0.12),
    0 36px 72px -16px rgb(var(--shadow-ink) / 0.3);

  /* Type */
  --font-display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --font-text:
    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  --text-display: clamp(2.75rem, 1.5rem + 5.5vw, 5.5rem);
  --text-display-down: clamp(2.25rem, 1.25rem + 3.5vw, 3.75rem);
  --text-h2: clamp(1.75rem, 1.3rem + 1.6vw, 2.5rem);
  --text-h3: 1.25rem;
  --text-lede: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-eyebrow: 0.75rem;

  /* Layout and motion */
  --container: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --header-height: 4rem;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --reveal-duration: 480ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #111214;
    --c-bg-2: #16171a;
    --c-surface: #1a1b1e;
    --c-surface-2: #232428;
    --c-line: #2e3035;
    --c-line-strong: #43454c;
    --c-ink: #f2f1ee;
    --c-ink-2: #c9cbd0;
    --c-muted: #a1a4ab;
    --c-accent: #ff6a3d;
    --c-accent-ui: #ff6a3d;
    --c-accent-text: #ff8560;
    --c-accent-soft: #3a241c;
    --c-on-accent: #17181a;
    --c-success: #4cc77f;
    --c-success-soft: #1d3327;
    --c-focus: #7aa5ff;
    --c-band: #0b0b0d;
    --c-band-2: #15161a;
    --shadow-ink: 0 0 0;
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4), 0 1px 1px rgb(0 0 0 / 0.2);
    --shadow-md: 0 2px 4px rgb(0 0 0 / 0.3), 0 12px 28px -10px rgb(0 0 0 / 0.6);
    --shadow-lg:
      0 8px 16px -8px rgb(0 0 0 / 0.5), 0 36px 72px -16px rgb(0 0 0 / 0.8);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-text);
  font-size: var(--text-body);
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure,
pre {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

a {
  color: var(--c-accent-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

svg {
  display: block;
}

:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
}

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

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--c-ink);
  color: var(--c-bg);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ------------------------------------------------------------ Type */
.display,
.h2,
.h3,
.brand__name,
.fact__number,
.step__num {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 800;
  color: var(--c-ink);
  text-wrap: balance;
}

.display {
  font-size: var(--text-display);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.display--down {
  font-size: var(--text-display-down);
}

.h2 {
  font-size: var(--text-h2);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.h3 {
  font-size: var(--text-h3);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.lede {
  font-size: var(--text-lede);
  line-height: 1.5;
  color: var(--c-ink-2);
  text-wrap: pretty;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--text-eyebrow);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.eyebrow--rule::before {
  content: "";
  width: 1.25rem;
  height: 2px;
  border-radius: 1px;
  background: var(--c-accent);
}

.eyebrow--band {
  color: var(--c-band-accent);
}

/* ------------------------------------------------------------ Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 3rem;
  padding: 0 1.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 160ms var(--ease-out),
    border-color 160ms var(--ease-out),
    color 160ms var(--ease-out),
    transform 160ms var(--ease-out),
    box-shadow 160ms var(--ease-out);
}

.button:active {
  transform: scale(0.98);
}

.button--primary {
  background: var(--c-accent-ui);
  border-color: var(--c-accent-ui);
  color: var(--c-on-accent);
}

.button--primary:hover {
  background: var(--c-accent-text);
  border-color: var(--c-accent-text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.button--primary:active {
  transform: translateY(0) scale(0.98);
}

.button--secondary {
  background: transparent;
  border-color: var(--c-line-strong);
  color: var(--c-ink);
}

.button--secondary:hover {
  background: var(--c-surface-2);
}

.button--small {
  height: 2.75rem;
  padding: 0 1.25rem;
  font-size: var(--text-small);
}

.button__arrow {
  transition: transform 160ms var(--ease-out);
}

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 2.75rem;
  padding: 0 0.25rem;
  color: var(--c-accent-text);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 160ms var(--ease-out);
}

.text-link:hover {
  color: var(--c-ink);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.actions--centre {
  justify-content: center;
}

/* ------------------------------------------------------------ Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: var(--c-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease-out);
}

.js .header {
  background: color-mix(in srgb, var(--c-bg) 85%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  backdrop-filter: blur(14px) saturate(1.4);
}

.header.is-scrolled {
  border-bottom-color: var(--c-line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  min-height: 2.75rem;
  color: var(--c-ink);
  text-decoration: none;
  border-radius: 999px;
}

.brand__name {
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  line-height: 1;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-right: 0.75rem;
}

.header__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 0.75rem;
  border-radius: 999px;
  color: var(--c-ink-2);
  font-size: var(--text-small);
  font-weight: 600;
  text-decoration: none;
  transition:
    color 160ms var(--ease-out),
    background-color 160ms var(--ease-out);
}

.header__link:hover {
  color: var(--c-ink);
  background: var(--c-surface-2);
}

/* ------------------------------------------------------------ Hero */
.hero {
  position: relative;
  padding-block: clamp(4rem, 10vw, 7rem) clamp(3rem, 8vw, 5rem);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(
      70rem 32rem at 100% -20%,
      var(--c-accent-soft),
      transparent 60%
    ),
    linear-gradient(
      to right,
      color-mix(in srgb, var(--c-ink) 4%, transparent) 1px,
      transparent 1px
    );
  background-size:
    auto,
    calc(100% / 7) 100%;
  background-position:
    0 0,
    -1px 0;
  overflow: clip;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.hero__title {
  max-width: 12ch;
}

.hero__lede {
  max-width: 38rem;
}

/* Facts rows */
.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem clamp(1.5rem, 2.5vw, 3rem);
  width: 100%;
  margin-top: 0.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-line);
}

.fact {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.25rem;
}

.fact__number {
  font-size: 2rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.fact__label {
  font-size: var(--text-eyebrow);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.facts--band {
  border-top-color: rgb(255 255 255 / 0.1);
}

.facts--band .fact__number {
  color: var(--c-band-ink);
}

.facts--band .fact__label {
  color: var(--c-band-muted);
}

/* The board: three planes */
.hero__visual {
  min-width: 0;
}

.scene {
  --mx: 0;
  --my: 0;
  position: relative;
  padding: 2.5rem 0 4.5rem 0.5rem;
  transform-style: preserve-3d;
  transition: transform 220ms var(--ease-out);
}

.plane {
  --depth: 0px;
  --rot: 0deg;
  transform: translate(
      calc(var(--mx) * var(--depth)),
      calc(var(--my) * var(--depth))
    )
    rotate(var(--rot));
  transition: transform 220ms var(--ease-out);
}

.plane--mid {
  --depth: 6px;
  --rot: -3deg;
  position: absolute;
  left: -2rem;
  bottom: 0;
  width: min(17.5rem, 78%);
  transform-origin: center;
}

.plane--front {
  --depth: 12px;
  --rot: 4deg;
  position: absolute;
  top: 0.25rem;
  right: 0;
}

.board {
  padding: 1.125rem 0.75rem 1.375rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
}

.board__week {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.25rem;
}

.board__col {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 0.375rem 0.125rem;
  border-radius: 10px;
}

.board__col--today {
  background: var(--c-accent-soft);
}

.board__day {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-content: flex-start;
  gap: 0.125rem 0.25rem;
  height: 2.25rem;
  margin-bottom: 0.125rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.board__today {
  padding: 0.0625rem 0.375rem;
  border-radius: 999px;
  background: var(--c-accent);
  color: var(--c-on-accent);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.board__bar {
  display: flex;
  align-items: center;
  height: 1.75rem;
  padding: 0 0.375rem;
  border-radius: 6px;
  background: var(--c-surface-2);
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
  animation: rise 420ms var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 40ms);
}

/* The two labelled slots grow to two lines rather than truncate. */
.board__bar--text {
  height: auto;
  min-height: 1.75rem;
  padding: 0.3125rem 0.1875rem;
  letter-spacing: -0.01em;
  line-height: 1.15;
  white-space: normal;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Session card, the app's anatomy */
.session {
  position: relative;
  display: grid;
  gap: 0.375rem;
  padding: 1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
}

.session__time {
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  flex-wrap: nowrap;
  white-space: nowrap;
  color: var(--c-accent-text);
  font-variant-numeric: tabular-nums;
  padding-right: 4.25rem;
}

.session__duration {
  white-space: nowrap;
}

.session__duration::before {
  content: "·";
  margin: 0 0.375rem;
  color: var(--c-line-strong);
}

.session__duration {
  font-weight: 500;
  color: var(--c-muted);
}

.session__name {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.session__pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.625rem;
  font-size: 0.8125rem;
  color: var(--c-muted);
}

.session__meta + .session__meta::before {
  content: "·";
  margin-right: 0.625rem;
  color: var(--c-line-strong);
}

.session > .save-toggle {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
  padding: 0 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: var(--c-surface-2);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  white-space: nowrap;
}

.save-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 1.75rem;
  padding: 0 0.625rem 0 0.5rem;
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  background: var(--c-surface);
  color: var(--c-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.save-toggle--on {
  background: var(--c-accent-soft);
  border-color: transparent;
  color: var(--c-accent-text);
}

.save-toggle__star {
  animation: pop 320ms var(--ease-spring) 900ms both;
}

@keyframes pop {
  from {
    transform: scale(0.6);
  }
  to {
    transform: scale(1);
  }
}

/* The file chip */
.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem 0.625rem 0.75rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  color: var(--c-ink);
}

.file-chip__glyph {
  color: var(--c-accent);
  flex: none;
}

.file-chip__text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  line-height: 1.2;
}

.file-chip__name {
  font-size: 0.8125rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.file-chip__meta {
  font-size: 0.6875rem;
  color: var(--c-muted);
}

.file-chip--drift {
  animation: drift 6s ease-in-out infinite;
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

.file-chip--small {
  padding: 0.5rem 0.75rem 0.5rem 0.625rem;
  box-shadow: var(--shadow-sm);
}

/* ------------------------------------------------------------ Sections */
.section {
  padding-block: clamp(4rem, 8vw, 6rem);
}

.band {
  background: var(--c-bg-2);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 40rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.section__head--wide {
  max-width: 46rem;
}

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

/* The problem */
.problem {
  padding-block: 4rem;
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem 3rem;
}

.problem__title {
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.problem__line {
  margin-top: 0.5rem;
  color: var(--c-muted);
  text-wrap: pretty;
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.step__num {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--c-accent);
  margin-bottom: 0.75rem;
}

.step__text {
  color: var(--c-ink-2);
  text-wrap: pretty;
}

.strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 1.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.875rem;
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  background: var(--c-surface);
  color: var(--c-ink);
  font: inherit;
  font-size: var(--text-small);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color 160ms var(--ease-out),
    border-color 160ms var(--ease-out),
    color 160ms var(--ease-out);
}

.chip:hover {
  background: var(--c-surface-2);
}

.chip--pressed,
.chip[aria-pressed="true"],
.chip[aria-current="true"] {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: var(--c-bg);
}

.chip--large {
  min-height: 2.75rem;
  padding: 0 1.125rem;
  scroll-snap-align: start;
}

.session--fragment {
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 0.125rem 0.75rem;
  align-items: center;
  padding: 0.625rem 0.75rem;
  box-shadow: var(--shadow-sm);
}

.session--fragment .session__time {
  grid-column: 1;
  padding-right: 0;
}

.session--fragment .session__name {
  grid-column: 1;
  font-size: 0.9375rem;
}

.session--fragment .save-toggle {
  grid-column: 2;
  grid-row: 1 / span 2;
  position: static;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 2.25rem;
  padding: 0 0.75rem;
  border-radius: 999px;
  background: var(--c-surface-2);
  font-size: var(--text-small);
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.3125rem;
  border-radius: 999px;
  background: var(--c-accent-ui);
  color: var(--c-on-accent);
  font-size: 0.6875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.mini-cal {
  display: grid;
  grid-template-columns: repeat(7, 1rem);
  gap: 0.25rem;
  padding: 0.5rem;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  background: var(--c-surface-2);
}

.mini-cal__day {
  position: relative;
  height: 1rem;
  border-radius: 4px;
  background: var(--c-surface);
}

.mini-cal__day--dot::after {
  content: "";
  position: absolute;
  inset: 0.3125rem;
  border-radius: 50%;
  background: var(--c-accent);
}

/* Features */
.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.tile {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  padding: 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 16px;
  transition:
    transform 200ms var(--ease-out),
    box-shadow 200ms var(--ease-out);
}

.tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tile__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.375rem;
  border-radius: 10px;
  background: var(--c-accent-soft);
  color: var(--c-accent-text);
}

.tile__icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.tile__text {
  color: var(--c-ink-2);
  text-wrap: pretty;
}

/* The app */
.demo {
  padding-block: 5rem;
}

.demo__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.demo__frame {
  background: var(--c-surface);
  border: 1px solid var(--c-line-strong);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.demo__chrome {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 2.5rem;
  padding: 0 1rem;
  border-bottom: 1px solid var(--c-line);
  background: var(--c-surface-2);
}

.demo__dots {
  position: absolute;
  left: 1rem;
  display: flex;
  gap: 0.375rem;
}

.demo__dots span {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
  background: var(--c-line-strong);
}

.demo__address {
  min-width: 12rem;
  padding: 0.25rem 0.875rem;
  border-radius: 999px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  font-size: 0.75rem;
  text-align: center;
  color: var(--c-muted);
}

.demo__iframe {
  display: block;
  width: 100%;
  height: clamp(46rem, 88vh, 56rem);
  border: 0;
  background: var(--c-bg);
}

.demo__full {
  margin-top: 1rem;
  text-align: right;
}

/* Make it yours */
.yours {
  padding-block: clamp(4rem, 8vw, 6rem);
  background-color: var(--c-band);
  background-image: radial-gradient(
    60rem 30rem at 100% 0%,
    var(--c-band-2),
    transparent 65%
  );
  color: var(--c-band-ink);
}

.yours__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
}

.yours__copy {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.yours .h2 {
  color: var(--c-band-ink);
}

.yours__text {
  color: var(--c-band-muted);
  text-wrap: pretty;
}

.yours .facts {
  margin-top: 0.75rem;
}

.code {
  background: var(--c-band-2);
  border: 1px solid rgb(255 255 255 / 0.08);
  border-radius: 16px;
  overflow: hidden;
}

.code__title {
  padding: 0.625rem 1rem;
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-band-muted);
}

.code__body {
  padding: 1rem 1.25rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--c-band-ink);
}

.tok-key {
  color: var(--c-band-ink);
}

.tok-str {
  color: var(--c-band-accent);
}

.tok-p {
  color: var(--c-band-muted);
}

.yours__caption {
  margin-top: 0.75rem;
  font-size: var(--text-small);
  color: var(--c-band-muted);
}

.inline-code {
  font-family: var(--font-mono);
  font-size: 0.8125em;
  padding: 0.0625rem 0.375rem;
  border-radius: 6px;
  background: rgb(255 255 255 / 0.08);
  color: var(--c-band-ink);
}

/* Closing */
.closing {
  padding-block: 6rem;
  background: var(--c-bg);
}

.closing__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.closing__tile {
  display: inline-block;
  transition: transform 700ms var(--ease-out);
}

.closing__tile:hover {
  transform: rotate(-8deg);
}

.closing__title {
  max-width: 18ch;
}

.closing__lede {
  max-width: 34rem;
}

.closing .actions {
  margin-top: 0.5rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--c-line);
  padding-block: 2.5rem;
  font-size: var(--text-small);
  color: var(--c-muted);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 0.5rem;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 160ms var(--ease-out);
}

.footer__link:hover {
  color: var(--c-ink);
  text-decoration: underline;
}

/* ------------------------------------------------------------ Reveals */
.js [data-reveal],
.js [data-reveal-group] > * {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity var(--reveal-duration) var(--ease-out),
    transform var(--reveal-duration) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal].is-in,
.js [data-reveal-group].is-in > * {
  opacity: 1;
  transform: none;
}

/* ------------------------------------------------------------ Tablet */
@media (max-width: 1023.98px) {
  .tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ------------------------------------------------------------ Phone */
@media (max-width: 719.98px) {
  .header__links {
    display: none;
  }

  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  .hero__title {
    max-width: none;
  }

  /* Two full-width pills, primary over secondary. The closing section's
     button and text link fit on one row and keep the default. */
  .hero .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero .actions .button {
    width: 100%;
  }

  /* Facts compose as a grid rather than wrapping three-plus-one. */
  .facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem 1rem;
  }

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

  .fact__label {
    text-wrap: balance;
  }

  .scene {
    padding: 0;
  }

  .plane--mid,
  .plane--front {
    display: none;
  }

  .board {
    padding: 1rem 0.5rem 1.25rem;
  }

  .board__week {
    gap: 0.1875rem;
  }

  .board__col {
    padding: 0.25rem 0.0625rem;
  }

  .board__bar--text {
    padding-inline: 0.125rem;
  }

  .board__day {
    font-size: 0.625rem;
    letter-spacing: 0.04em;
  }

  .board__bar {
    padding: 0 0.25rem;
    font-size: 0.625rem;
  }

  .problem {
    padding-block: 3rem;
  }

  .problem__grid,
  .steps,
  .tiles,
  .yours__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .demo {
    padding-block: 3rem;
  }

  .demo__chips-wrap {
    margin-inline: calc(-1 * var(--gutter));
  }

  .demo__chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-inline: var(--gutter);
    padding-bottom: 0.25rem;
    scroll-snap-type: x proximity;
    scroll-padding-inline: var(--gutter);
    scrollbar-width: none;
  }

  .demo__chips::-webkit-scrollbar {
    display: none;
  }

  .demo__chrome {
    display: none;
  }

  .demo__frame {
    border-radius: 16px;
  }

  .demo__iframe {
    height: min(70vh, 40rem);
  }

  /* Every line of the excerpt stays visible; nothing scrolls off the edge. */
  .code__body {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font-size: 0.75rem;
    padding: 0.875rem 1rem 1rem;
  }

  .closing {
    padding-block: 4rem;
  }

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

/* ------------------------------------------------------------ Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }

  .js [data-reveal],
  .js [data-reveal-group] > * {
    opacity: 1;
    transform: none;
  }

  .closing__tile:hover {
    transform: none;
  }
}