:root {
  color-scheme: light;
  --paper: oklch(97% 0.018 92);
  --ink: oklch(20% 0.035 78);
  --muted: oklch(45% 0.035 78);
  --red: oklch(57% 0.17 28);
  --blue: oklch(58% 0.13 242);
  --green: oklch(55% 0.13 152);
  --amber: oklch(68% 0.14 78);
  --brown: oklch(37% 0.08 62);
  --shadow: 0 16px 45px oklch(22% 0.03 70 / 13%);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  overflow-x: clip;
  color: var(--ink);
  background:
    linear-gradient(90deg, oklch(93% 0.022 85) 1px, transparent 1px),
    linear-gradient(0deg, oklch(93% 0.022 85) 1px, transparent 1px),
    var(--paper);
  background-size: 36px 36px;
}

a {
  color: inherit;
}

.shell {
  display: grid;
  width: min(1240px, calc(100% - 32px));
  min-height: 100vh;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 30px;
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  position: sticky;
  top: 48px;
  align-self: start;
  min-height: calc(100vh - 96px);
  padding: 0 30px 0 0;
  border-right: 2px solid var(--ink);
}

.brand-mark {
  display: flex;
  align-items: center;
  flex-direction: column;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brown);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  line-height: 0;
}

h1 img {
  display: block;
  width: 205px;
  max-width: 100%;
  height: auto;
}

.site-grid {
  display: grid;
  align-self: start;
  gap: 18px;
}

.book-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.book-tab {
  min-height: 42px;
  padding: 8px 16px;
  background: oklch(99% 0.012 92);
  border: 2px solid var(--ink);
  color: var(--ink);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.book-tab:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}

.book-tab[aria-current="true"] {
  background: var(--brown);
  color: var(--paper);
}

.book {
  perspective: 1600px;
}

.site-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: hidden;
  padding: 0 0 18px;
  background: oklch(99% 0.012 92);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow);
  text-decoration: none;
  transform-origin: left center;
  animation: page-turn 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.site-card::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    100deg,
    transparent 0%,
    oklch(20% 0.035 78 / 18%) 42%,
    oklch(99% 0.012 92 / 45%) 52%,
    transparent 68%
  );
  content: "";
  transform: translateX(-120%);
  animation: page-sheen 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.site-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 var(--accent);
}

.preview {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background: oklch(96% 0.018 92);
}

.preview iframe {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  pointer-events: none;
  background: oklch(96% 0.018 92);
}

.site-card p {
  display: -webkit-box;
  width: calc(100% - 56px);
  max-width: calc(100% - 56px);
  margin: 0 28px;
  overflow: hidden;
  color: var(--muted);
  font-size: 1.18rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.red {
  --accent: var(--red);
}

.blue {
  --accent: var(--blue);
}

.green {
  --accent: var(--green);
}

.amber {
  --accent: var(--amber);
}

@keyframes page-turn {
  0% {
    opacity: 0;
    box-shadow: -34px 14px 42px oklch(22% 0.03 70 / 22%);
    transform: rotateY(42deg) translateX(44px) skewY(-1deg);
  }

  62% {
    opacity: 1;
    box-shadow: -14px 8px 28px oklch(22% 0.03 70 / 14%);
    transform: rotateY(-4deg) translateX(-4px) skewY(0.35deg);
  }

  100% {
    opacity: 1;
    box-shadow: var(--shadow);
    transform: rotateY(0) translateX(0) skewY(0);
  }
}

@keyframes page-sheen {
  0% {
    opacity: 0;
    transform: translateX(-120%);
  }

  35% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translateX(120%);
  }
}

@media (max-width: 900px) {
  html,
  body {
    max-width: 100%;
    overflow-x: clip;
  }

  .shell {
    display: block;
    width: calc(100% - 28px);
    max-width: 390px;
    min-height: 0;
  }

  .hero {
    position: static;
    min-height: 0;
    margin-bottom: 28px;
    padding: 0 0 24px;
    border-right: 0;
    border-bottom: 2px solid var(--ink);
  }

  .brand-mark {
    align-items: flex-start;
  }

  h1 {
    width: min(100%, 340px);
  }

  h1 img {
    width: 100%;
  }

  .site-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .book,
  .site-card,
  .preview {
    overflow: hidden;
    max-width: 100%;
  }

  .site-card {
    width: 100%;
    animation-name: mobile-page-turn;
    padding-bottom: 18px;
  }

  .site-card:hover {
    transform: none;
  }

  .preview {
    aspect-ratio: auto;
    height: 220px;
  }

  .preview iframe {
    width: 700px;
    height: 432px;
    transform: scale(0.51);
    transform-origin: 0 0;
  }
}

@keyframes mobile-page-turn {
  0% {
    opacity: 0;
    box-shadow: 0 10px 24px oklch(22% 0.03 70 / 16%);
    transform: rotateX(5deg) translateY(10px);
  }

  100% {
    opacity: 1;
    box-shadow: var(--shadow);
    transform: rotateX(0) translateY(0);
  }
}

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