/* LyteFast Studio — one stylesheet, no build step.
   Modern CSS throughout: light-dark(), OKLCH, nesting, container queries,
   scroll-driven animations and cross-document view transitions. Everything
   degrades to a static, readable page where unsupported. */

@view-transition { navigation: auto; }

:root {
  color-scheme: dark light;
  --bg: light-dark(oklch(97.5% 0.006 95), oklch(14.5% 0.008 265));
  --bg-2: light-dark(oklch(94.5% 0.008 95), oklch(17.5% 0.01 265));
  --surface: light-dark(oklch(99.5% 0.002 95 / .78), oklch(20% 0.012 265 / .62));
  --surface-solid: light-dark(oklch(99.5% 0.002 95), oklch(19% 0.012 265));
  --ink: light-dark(oklch(18% 0.01 265), oklch(96% 0.006 95));
  --ink-2: light-dark(oklch(40% 0.012 265), oklch(76% 0.01 265));
  --ink-3: light-dark(oklch(55% 0.012 265), oklch(60% 0.012 265));
  --line: light-dark(oklch(18% 0.01 265 / .1), oklch(100% 0 0 / .085));
  --line-2: light-dark(oklch(18% 0.01 265 / .2), oklch(100% 0 0 / .16));
  --accent: light-dark(oklch(54% 0.16 158), oklch(87% 0.2 152));
  --accent-2: light-dark(oklch(50% 0.18 250), oklch(72% 0.16 240));
  --accent-ink: light-dark(oklch(99% 0 0), oklch(18% 0.04 152));
  --shadow: light-dark(oklch(30% 0.02 265 / .16), oklch(0% 0 0 / .55));

  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Instrument Serif", ui-serif, Georgia, serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --gutter: clamp(16px, 4vw, 44px);
  --max: 1240px;
  --radius: 22px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --spring: linear(0, .009, .035 2.1%, .141, .281 6.7%, .723 12.9%, .938 16.7%, 1.017, 1.077, 1.121, 1.149 24.3%, 1.159, 1.163, 1.161, 1.154 29.9%, 1.129 32.8%, 1.051 39.6%, 1.017 43.1%, .991, .977 51%, .974 53.8%, .975 57.1%, .997 69.8%, 1.003 76.9%, 1);
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; interpolate-size: allow-keywords; }
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
button { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; text-wrap: balance; letter-spacing: -0.025em; }
p { margin: 0; text-wrap: pretty; }
em { font-family: var(--font-serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }
kbd { font: 500 11px/1 var(--font-mono); padding: 4px 6px; border: 1px solid var(--line-2); border-radius: 6px; color: var(--ink-3); }
cite { font-style: normal; font-weight: 600; }
.mono { font-family: var(--font-mono); font-size: .86em; letter-spacing: 0; }
.muted { color: var(--ink-2); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.wrap { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
::selection { background: color-mix(in oklch, var(--accent) 40%, transparent); }

.skip {
  position: absolute; left: 12px; top: -48px; z-index: 100; padding: 10px 14px;
  background: var(--ink); color: var(--bg); border-radius: 10px; transition: top .2s;
  &:focus { top: 12px; }
}

/* Ambient light: two slow, blurred colour fields plus film grain. */
.aurora {
  position: fixed; inset: -20vmax; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40vmax 30vmax at 18% 12%, color-mix(in oklch, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(42vmax 32vmax at 85% 8%, color-mix(in oklch, var(--accent-2) 18%, transparent), transparent 70%),
    radial-gradient(30vmax 26vmax at 70% 90%, color-mix(in oklch, var(--accent) 8%, transparent), transparent 70%);
  filter: blur(20px);
  animation: drift 40s ease-in-out infinite alternate;
  &::after {
    content: ""; position: absolute; inset: 0; opacity: .07; mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  }
}
@keyframes drift { to { transform: translate3d(3vmax, -2vmax, 0) rotate(4deg); } }

/* ------------------------------------------------------------ nav */

.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.6) blur(18px);
  -webkit-backdrop-filter: saturate(1.6) blur(18px);
  background: color-mix(in oklch, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 24px; width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; height: 64px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; letter-spacing: -0.02em; font-size: 17px;
  & em { font-size: 1.12em; color: var(--ink-2); }
}
.logo-mark { width: 30px; height: 30px; flex: none; }
.nav-links {
  display: flex; gap: 4px; margin-inline-start: 12px;
  & a { padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--ink-2); font-size: 14.5px; transition: color .2s, background .2s; }
  & a:hover, & a[aria-current] { color: var(--ink); background: var(--line); }
}
.nav-tools { display: flex; gap: 8px; margin-inline-start: auto; }
.tool {
  display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 12px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface); cursor: pointer;
  color: var(--ink-2); font-size: 14px; transition: border-color .2s, color .2s;
  & svg { width: 17px; height: 17px; }
  &:hover { color: var(--ink); border-color: var(--line-2); }
}
.theme-toggle { width: 38px; padding: 0; justify-content: center; }
.i-moon { display: none; }
:root[data-theme="light"] .i-sun, :root:not([data-theme]) .i-sun { display: none; }
:root[data-theme="light"] .i-moon, :root:not([data-theme]) .i-moon { display: block; }
:root[data-theme="dark"] .i-sun { display: block; }
:root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .i-sun { display: block; }
  :root:not([data-theme]) .i-moon { display: none; }
}

.store-menu {
  inset: auto; position-area: bottom span-left; position-try-fallbacks: flip-block;
  margin: 8px 0 0; width: 260px; padding: 8px; border: 1px solid var(--line-2); border-radius: 16px;
  background: var(--surface-solid); color: var(--ink); box-shadow: 0 24px 60px -20px var(--shadow);
  opacity: 1; transform: none; transition: opacity .2s, transform .25s var(--ease), display .25s allow-discrete, overlay .25s allow-discrete;
  @starting-style { opacity: 0; transform: translateY(-6px) scale(.98); }
  &:not(:popover-open) { opacity: 0; transform: translateY(-6px) scale(.98); }
  & .menu-title { padding: 8px 10px 6px; font-size: 12px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; }
  & button {
    display: flex; flex-direction: column; width: 100%; padding: 9px 10px; border: 0; border-radius: 10px; background: none; text-align: left; cursor: pointer; font-size: 14px;
    &:hover { background: var(--line); }
    &[aria-checked="true"] { background: color-mix(in oklch, var(--accent) 16%, transparent); }
    & small { color: var(--ink-3); font-size: 12px; }
  }
}
/* Browsers without anchor positioning: pin the menu under the nav. */
@supports not (position-area: bottom) {
  .store-menu { position: fixed; top: 64px; right: var(--gutter); left: auto; }
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .tool .label, .tool kbd { display: none; }
  .tool { width: 38px; padding: 0; justify-content: center; }
}

/* ------------------------------------------------------------ buttons & chips */

.btn {
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 20px;
  border-radius: 999px; border: 1px solid var(--line-2); background: var(--surface); text-decoration: none;
  font-weight: 500; font-size: 15px; cursor: pointer; transition: transform .3s var(--spring), border-color .2s, background .2s;
  & svg { width: 18px; height: 18px; flex: none; }
  &:hover { transform: translateY(-2px); border-color: var(--ink-3); }
  &:active { transform: translateY(0) scale(.98); }
  & span { display: flex; flex-direction: column; line-height: 1.15; }
  & small { font-size: 11px; font-weight: 400; opacity: .75; }
}
.btn-primary {
  background: var(--ink); color: var(--bg); border-color: transparent;
  box-shadow: 0 10px 30px -12px color-mix(in oklch, var(--accent) 70%, transparent);
  &:hover { border-color: transparent; background: color-mix(in oklch, var(--ink) 88%, var(--accent)); }
}
.chips {
  display: flex; flex-wrap: wrap; gap: 6px;
  & span { font: 500 12px/1 var(--font-mono); padding: 6px 9px; border-radius: 999px; background: var(--line); color: var(--ink-2); }
}
.kicker { display: flex; align-items: center; gap: 10px; color: var(--ink-2); font-size: 14px; letter-spacing: .02em;
  & .mono { color: var(--accent); }
}

/* ------------------------------------------------------------ hero */

.hero { padding-block: clamp(56px, 10vw, 128px) 32px; text-align: center; display: grid; justify-items: center; gap: 28px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); font-size: 13.5px; color: var(--ink-2);
}
.pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse { 70% { box-shadow: 0 0 0 10px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
.hero-title {
  font-size: clamp(2.9rem, 8.4vw, 7.2rem); line-height: .94; font-weight: 600; letter-spacing: -0.045em;
  & em {
    font-size: 1.08em; letter-spacing: -0.02em;
    background: linear-gradient(100deg, var(--accent), var(--accent-2) 60%, var(--accent));
    background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent;
    animation: sheen 8s ease-in-out infinite;
    padding-inline-end: .06em;
  }
}
@keyframes sheen { 50% { background-position: 100% 0; } }
.hero-lede { max-width: 60ch; font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--ink-2); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stats {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; margin: 16px 0 0; width: min(100%, 900px);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--line);
  & div { padding: 18px 12px; background: var(--surface-solid); }
  & dt { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 500; letter-spacing: -0.03em; color: var(--ink); font-variant-numeric: tabular-nums; }
  & dd { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-3); line-height: 1.3; }
}
@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); & div:last-child { grid-column: span 2; } }
}

.reveal-now { animation: rise .9s var(--ease) both; }
.hero > .reveal-now:nth-child(2) { animation-delay: .06s; }
.hero > .reveal-now:nth-child(3) { animation-delay: .12s; }
.hero > .reveal-now:nth-child(4) { animation-delay: .18s; }
.hero > .reveal-now:nth-child(5) { animation-delay: .24s; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } }

/* The cover wall: two counter-scrolling, tilted rows. Scrolling flattens it. */
.wall {
  --tilt: 22deg;
  perspective: 1400px; overflow: clip; padding-block: 24px 64px; margin-top: -8px;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.wall-tilt {
  display: grid; gap: 18px; transform: rotateX(var(--tilt)) rotateZ(-3deg) scale(1.08); transform-origin: 50% 0;
}
@supports (animation-timeline: scroll()) {
  .wall-tilt { animation: flatten linear both; animation-timeline: scroll(root); animation-range: 0 70vh; }
  @keyframes flatten { to { transform: rotateX(0deg) rotateZ(0deg) scale(1); } }
}
.wall-row { overflow: visible; }
.wall-track { display: flex; gap: 18px; width: max-content; animation: marquee 120s linear infinite; }
.wall-row--r .wall-track { animation-direction: reverse; animation-duration: 140s; }
.wall:hover .wall-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.wall-cover { width: 120px; height: 192px; object-fit: cover; border-radius: 4px 8px 8px 4px; box-shadow: 0 18px 30px -14px var(--shadow), inset 3px 0 0 oklch(0% 0 0 / .2); }
.wall-icon { width: 120px; height: 120px; align-self: center; border-radius: 27%; box-shadow: 0 18px 30px -14px var(--shadow); }

/* ------------------------------------------------------------ sections */

.section { padding-block: clamp(64px, 9vw, 120px) 0; }
.section-head {
  display: grid; gap: 14px; margin-bottom: 40px; max-width: 760px;
  & h2 { font-size: clamp(2.2rem, 5vw, 3.8rem); line-height: 1; font-weight: 600; letter-spacing: -0.04em; }
  & h2 em { color: var(--ink-2); }
  & .lede { color: var(--ink-2); font-size: 1.08rem; max-width: 62ch; }
}

@supports (animation-timeline: view()) {
  .reveal { animation: reveal linear both; animation-timeline: view(); animation-range: entry 0% entry 70%; }
  /* translate/scale (not transform) so hover transforms still apply */
  @keyframes reveal { from { opacity: 0; translate: 0 36px; scale: .985; } }
}

/* ------------------------------------------------------------ cards */

.card {
  --mx: 50%; --my: 50%;
  position: relative; isolation: isolate; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .3s, transform .5s var(--spring), box-shadow .4s;
  &::before {
    content: ""; position: absolute; inset: -1px; z-index: -1; border-radius: inherit; opacity: 0; transition: opacity .35s;
    background: radial-gradient(420px circle at var(--mx) var(--my), color-mix(in oklch, var(--glow) 22%, transparent), transparent 62%);
  }
  &::after {
    content: ""; position: absolute; inset: -1px; z-index: -1; border-radius: inherit; padding: 1px; opacity: 0; transition: opacity .35s; pointer-events: none;
    background: radial-gradient(260px circle at var(--mx) var(--my), var(--glow), transparent 70%);
    mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  }
  &:hover { border-color: var(--line-2); box-shadow: 0 30px 60px -36px color-mix(in oklch, var(--glow) 50%, var(--shadow)); }
  &:hover::before, &:hover::after { opacity: 1; }
}

.app-grid {
  display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 268px), 1fr));
  container-type: inline-size;
}
.app-card {
  display: flex; flex-direction: column; gap: 10px; padding: 22px; text-decoration: none; min-height: 250px;
  &:hover { transform: translateY(-4px); }
  & h3 { font-size: 1.35rem; font-weight: 600; margin-top: 8px; }
  & .app-sub { color: var(--ink-3); font-size: 14px; margin-top: -6px; }
  & .app-tagline { color: var(--ink-2); font-size: 15px; line-height: 1.5; }
  & .go { margin-top: auto; padding-top: 8px; display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--ink-3); transition: color .2s, gap .3s var(--spring);
    & svg { width: 15px; height: 15px; } }
  &:hover .go { color: var(--ink); gap: 10px; }
}
.app-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.app-icon { border-radius: 23%; box-shadow: 0 10px 24px -10px var(--shadow), 0 0 0 1px var(--line); flex: none; }

.app-card--featured {
  grid-column: 1 / -1; display: grid; grid-template-columns: 1fr; padding: 28px; overflow: hidden; min-height: 0;
  & h3 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.04em; }
  & .app-tagline { font-size: 1.1rem; max-width: 44ch; }
  & .shots { display: none; }
}
@container (min-width: 760px) {
  .app-card--featured {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); column-gap: 32px; padding: 40px; min-height: 420px;
    & > :not(.shots) { grid-column: 1; }
    & .shots {
      display: block; position: absolute; inset: 24px 24px -80px 52%; pointer-events: none;
      & img {
        position: absolute; width: 38%; border-radius: 18px; border: 1px solid var(--line-2); box-shadow: 0 30px 50px -20px var(--shadow);
        transition: transform .8s var(--spring);
        &:nth-child(1) { left: 0; top: 18%; transform: rotate(-9deg); }
        &:nth-child(2) { left: 31%; top: 4%; z-index: 2; transform: rotate(0deg); }
        &:nth-child(3) { left: 62%; top: 18%; transform: rotate(9deg); }
      }
    }
    &:hover .shots img:nth-child(1) { transform: rotate(-12deg) translate(-12px, 8px); }
    &:hover .shots img:nth-child(2) { transform: translateY(-14px); }
    &:hover .shots img:nth-child(3) { transform: rotate(12deg) translate(12px, 8px); }
  }
}

/* ------------------------------------------------------------ books */

.filters { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 28px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); cursor: pointer; font-size: 14px; color: var(--ink-2);
  transition: all .2s;
  &:hover { color: var(--ink); border-color: var(--line-2); }
  &[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
}
.select select {
  appearance: none; font: inherit; font-size: 14px; color: var(--ink); padding: 9px 36px 9px 14px; border-radius: 999px; border: 1px solid var(--line); cursor: pointer;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='m3 4.5 3 3 3-3' fill='none' stroke='%23888' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center / 12px;
}

.book-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); }
.book-card {
  display: flex; flex-direction: column; padding: 22px 18px 18px;
  view-transition-class: book;
  &[hidden] { display: none; }
  & .cover-link { display: block; padding: 6px 18px 18px; }
  & h3 { font-size: 1.08rem; line-height: 1.25; font-weight: 600; letter-spacing: -0.015em;
    & a { text-decoration: none; }
    & a::after { content: ""; position: absolute; inset: 0; z-index: 0; border-radius: inherit; } }
  & .langs { position: relative; z-index: 1; }
}
.book-body { display: grid; gap: 8px; }
.kicker-sm { display: flex; gap: 8px; font: 500 11.5px/1 var(--font-mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em;
  & span + span::before { content: "·"; margin-right: 8px; } }
.book-by { color: var(--ink-2); font-size: 14px; }

.book3d {
  position: relative; perspective: 1000px; margin-inline: auto;
  & .cover {
    width: 100%; aspect-ratio: 5 / 8; object-fit: cover; border-radius: 3px 7px 7px 3px;
    transform: rotateY(-16deg) rotateX(2deg); transform-origin: 30% 50%;
    box-shadow:
      inset 4px 0 6px -3px oklch(100% 0 0 / .25),
      14px 18px 30px -12px var(--shadow),
      28px 40px 60px -30px color-mix(in oklch, var(--glow) 55%, transparent);
    transition: transform .8s var(--spring), box-shadow .5s;
  }
  &::after {
    /* spine crease + page edge highlight */
    content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: 3px 7px 7px 3px;
    transform: rotateY(-16deg) rotateX(2deg); transform-origin: 30% 50%; transition: transform .8s var(--spring);
    background: linear-gradient(90deg, oklch(0% 0 0 / .32) 0, oklch(100% 0 0 / .18) 2.5%, transparent 6%, transparent 94%, oklch(100% 0 0 / .1));
  }
}
.book-card:hover .book3d .cover, .book-card:hover .book3d::after,
.detail-cover:hover .book3d .cover, .detail-cover:hover .book3d::after { transform: rotateY(-4deg) translateY(-6px); }
.book3d--card { width: min(100%, 170px); }
@media (max-width: 540px) {
  .book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .book-card { padding: 14px 12px 12px; & .cover-link { padding: 4px 6px 12px; } & h3 { font-size: .98rem; } }
  .book-card .kicker-sm span:last-child { display: none; }
  .book-card .lang { padding: 6px 6px; font-size: 10.5px; }
}
.book3d--hero { width: min(100%, 340px); }

.langs { display: flex; flex-wrap: wrap; gap: 6px; }
.lang {
  font: 500 11.5px/1 var(--font-mono); padding: 7px 9px; border-radius: 8px; border: 1px solid var(--line); background: transparent; cursor: pointer; color: var(--ink-3);
  transition: all .2s;
  &:hover { color: var(--ink); border-color: var(--line-2); }
  &[aria-pressed="true"] { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
}
.detail .lang { font-size: 13px; padding: 8px 12px; border-radius: 999px; }
.empty { padding: 40px; text-align: center; color: var(--ink-3); }

/* ------------------------------------------------------------ pairs */

.pair-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.pair {
  display: grid; grid-template-columns: auto auto auto; align-items: center; justify-content: center; gap: 14px; padding: 28px 22px 22px;
  & .pair-text { grid-column: 1 / -1; text-align: center; color: var(--ink-2); font-size: 15px; margin-top: 8px;
    & a { color: var(--ink); } }
}
.pair-cover { width: 96px; height: auto; border-radius: 3px 6px 6px 3px; box-shadow: 10px 14px 24px -12px var(--shadow); transform: rotate(-4deg); transition: transform .6s var(--spring); }
.pair-icon { width: 76px; height: 76px; border-radius: 23%; box-shadow: 0 12px 24px -12px var(--shadow); transform: rotate(4deg); transition: transform .6s var(--spring); }
.pair:hover .pair-cover { transform: rotate(-8deg) translateX(-6px); }
.pair:hover .pair-icon { transform: rotate(8deg) translateX(6px); }
.pair-plus { font: 300 30px/1 var(--font-sans); color: var(--ink-3); }
.pair-icons { display: flex; flex-direction: column; gap: 10px;
  &:has(> :nth-child(2)) .pair-icon { width: 60px; height: 60px; } }

/* ------------------------------------------------------------ index */

.index-table { border-top: 1px solid var(--line-2); }
.index-row {
  display: grid; grid-template-columns: 96px 70px minmax(0, 2.2fr) minmax(0, 1.2fr) minmax(0, 1.1fr); gap: 16px; align-items: center;
  padding: 14px 8px; border-bottom: 1px solid var(--line); text-decoration: none; font-size: 14.5px; transition: background .2s, padding .3s var(--ease);
  &:not(.index-row--head):hover { background: var(--line); padding-inline: 16px 0; }
  & > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}
.index-row--head { font: 500 11.5px/1 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); padding-block: 12px; }
.index-title { font-weight: 500; }
.tag { font: 500 11px/1 var(--font-mono); padding: 5px 8px; border-radius: 6px; text-transform: uppercase; letter-spacing: .04em; }
.tag--app { background: color-mix(in oklch, var(--accent-2) 18%, transparent); color: var(--accent-2); }
.tag--book { background: color-mix(in oklch, var(--accent) 18%, transparent); color: light-dark(var(--accent), var(--accent)); }
@media (max-width: 760px) {
  .index-row { grid-template-columns: 74px minmax(0, 1fr); row-gap: 2px; }
  .index-row > span:nth-child(2), .index-row > span:nth-child(5) { display: none; }
  .index-row > span:nth-child(4) { grid-column: 2; font-size: 13px; }
  .index-row--head { display: none; }
}

/* ------------------------------------------------------------ detail pages */

.detail { padding-block: 28px 0; }
.back {
  display: inline-flex; align-items: center; gap: 8px; color: var(--ink-2); text-decoration: none; font-size: 14px; padding: 8px 0;
  & svg { width: 16px; height: 16px; transition: transform .3s var(--spring); }
  &:hover { color: var(--ink); & svg { transform: translateX(-4px); } }
}
.detail-hero {
  display: grid; gap: clamp(24px, 5vw, 64px); align-items: center; padding-block: 28px 48px;
  & h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); line-height: .98; font-weight: 600; letter-spacing: -0.045em; margin-top: 16px; }
  & .chips { margin-top: 4px; }
}
.detail-hero--app { grid-template-columns: auto 1fr;
  & .app-icon { width: clamp(96px, 16vw, 168px); height: auto; box-shadow: 0 30px 60px -24px color-mix(in oklch, var(--glow) 70%, var(--shadow)), 0 0 0 1px var(--line); }
}
.detail-hero--book { grid-template-columns: minmax(0, 340px) 1fr; }
.detail-cover { padding: 12px 24px 24px; position: relative;
  &::before { content: ""; position: absolute; inset: 10% 0 0; z-index: -1; background: radial-gradient(closest-side, color-mix(in oklch, var(--glow) 35%, transparent), transparent); filter: blur(30px); }
}
.detail-sub { font-family: var(--font-serif); font-style: italic; font-size: clamp(1.2rem, 2.2vw, 1.6rem); color: var(--ink-2); margin-top: 10px; line-height: 1.25; }
.detail-lede { font-size: 1.1rem; color: var(--ink-2); max-width: 58ch; margin: 18px 0 22px; }
.detail-hero .book-by { margin-top: 12px; font-size: 15px; }
.detail .langs { margin-bottom: 18px; }
.buy-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn-buy { min-height: 54px; }
.btn-store { min-height: 56px; padding-inline: 22px 26px; & svg { width: 24px; height: 24px; } }
@media (max-width: 720px) {
  .detail-hero--app { grid-template-columns: 1fr; }
  .detail-hero--book { grid-template-columns: 1fr; & .detail-cover { max-width: 260px; margin-inline: auto; } }
}

.shot-strip {
  display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 4px 24px; margin-bottom: 40px;
  scrollbar-width: thin; overscroll-behavior-x: contain;
  & img { flex: none; width: clamp(200px, 26vw, 280px); height: auto; scroll-snap-align: start; border-radius: 22px; border: 1px solid var(--line-2); box-shadow: 0 24px 40px -24px var(--shadow); }
}

.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: clamp(24px, 5vw, 64px); align-items: start; }
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }
.prose {
  max-width: 68ch; color: var(--ink-2); font-size: 16.5px;
  & h2 { color: var(--ink); font-size: 1.6rem; margin-bottom: 16px; }
  & p, & ul { margin: 0 0 1em; }
  & ul { padding-left: 1.2em; }
  & li { margin-bottom: .35em; }
  & li::marker { color: var(--accent); }
  & .desc-h { color: var(--ink); font-size: 1.05rem; font-weight: 600; margin: 1.6em 0 .5em; letter-spacing: -0.01em; }
  & .desc-lead { color: var(--ink); font-weight: 600; }
}
.facts {
  position: sticky; top: 88px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  & dl { margin: 0; display: grid; }
  & dl > div { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
  & dl > div:last-child { border-bottom: 0; }
  & dt { color: var(--ink-3); }
  & dd { margin: 0; text-align: right; }
}
.related { margin-top: 18px; display: grid; gap: 10px;
  & h3 { font-size: 13px; font-weight: 500; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
}
.related-book, .related-app {
  display: flex; align-items: center; gap: 12px; padding: 10px; border-radius: 14px; text-decoration: none; border: 1px solid var(--line); transition: background .2s;
  &:hover { background: var(--line); }
  & img { border-radius: 4px; flex: none; }
  & span { display: grid; line-height: 1.3; }
  & small { color: var(--ink-3); }
}
.related-app img { border-radius: 23%; }

.editions { display: grid; gap: 10px; }
.edition {
  display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; gap: 16px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface);
  & img { width: 56px; height: auto; border-radius: 2px 4px 4px 2px; box-shadow: 4px 6px 12px -6px var(--shadow); }
  & .edition-lang { color: var(--accent); font-size: 12px; }
  & .edition-title { font-weight: 500; line-height: 1.3; }
  & .muted { font-size: 13px; }
}
.edition-buy { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.pill-link {
  font-size: 13px; padding: 7px 11px; border-radius: 999px; border: 1px solid var(--line-2); text-decoration: none; white-space: nowrap; transition: all .2s;
  &:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
}
@media (max-width: 620px) {
  .edition { grid-template-columns: 48px minmax(0, 1fr); & .edition-buy { grid-column: 1 / -1; justify-content: flex-start; } }
}

.more { padding-top: clamp(56px, 8vw, 96px); }
.more-h { font-size: 1.5rem; margin-bottom: 20px; }

.notfound { padding-block: 120px; display: grid; gap: 24px; justify-items: start; }

/* ------------------------------------------------------------ search palette */

.palette {
  width: min(640px, calc(100% - 24px)); max-height: min(560px, 80dvh); margin: 12vh auto auto; padding: 0;
  border: 1px solid var(--line-2); border-radius: 20px; background: var(--surface-solid); color: var(--ink);
  box-shadow: 0 40px 100px -30px var(--shadow);
  opacity: 1; transform: none;
  transition: opacity .2s, transform .3s var(--spring), display .3s allow-discrete, overlay .3s allow-discrete;
  @starting-style { opacity: 0; transform: translateY(-10px) scale(.97); }
  &:not([open]) { opacity: 0; transform: translateY(-10px) scale(.97); }
  &::backdrop { background: oklch(10% 0.01 265 / .45); backdrop-filter: blur(6px); transition: opacity .25s, display .25s allow-discrete, overlay .25s allow-discrete; }
  &:not([open])::backdrop { opacity: 0; }
  @starting-style { &[open]::backdrop { opacity: 0; } }
}
.palette-box { display: grid; grid-template-rows: auto 1fr; max-height: inherit; margin: 0; }
.palette-field {
  display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--line);
  & svg { width: 20px; height: 20px; color: var(--ink-3); flex: none; }
  & input { flex: 1; border: 0; background: none; font: inherit; font-size: 17px; color: var(--ink); outline: none; min-width: 0; }
  & input::-webkit-search-cancel-button { display: none; }
}
.palette-results { list-style: none; margin: 0; padding: 8px; overflow-y: auto; }
.palette-results li a {
  display: grid; grid-template-columns: 40px 1fr auto; gap: 12px; align-items: center; padding: 8px 10px; border-radius: 12px; text-decoration: none;
  & img { width: 40px; height: 40px; object-fit: cover; border-radius: 9px; }
  & img.is-cover { width: 30px; height: 46px; margin-inline: 5px; border-radius: 2px 4px 4px 2px; }
  & strong { display: block; font-weight: 500; }
  & small { color: var(--ink-3); }
  & .tag { justify-self: end; }
}
.palette-results li[aria-selected="true"] a { background: var(--line); }
.palette-results .palette-empty { padding: 28px; text-align: center; color: var(--ink-3); }

/* ------------------------------------------------------------ footer */

.footer { margin-top: clamp(80px, 12vw, 160px); border-top: 1px solid var(--line); padding-block: 48px 28px; background: color-mix(in oklch, var(--bg-2) 60%, transparent); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px;
  & .muted { margin-top: 14px; max-width: 46ch; font-size: 14.5px; } }
.footer-h { font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); margin-bottom: 12px; }
.footer-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 14.5px;
  & a { text-decoration: none; color: var(--ink-2); } & a:hover { color: var(--ink); } }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 13px; color: var(--ink-3); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; & > :first-child { grid-column: 1 / -1; } } }

/* ------------------------------------------------------------ view transitions */

::view-transition-old(root), ::view-transition-new(root) { animation-duration: .35s; }
::view-transition-group(*) { animation-duration: .5s; animation-timing-function: var(--ease); }
::view-transition-group(.book) { animation-duration: .4s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .wall-tilt { transform: none; }
  @view-transition { navigation: none; }
}