:root {
  --ink: #0b0b0b;
  --muted: #707070;
  --line: #e7e7e7;
  --line-strong: #d4d4d4;
  --paper: #ffffff;
  --wash: #f6f6f6;
  --chip: rgba(255, 255, 255, .94);
  --chip-line: rgba(0, 0, 0, .08);
  --chip-line-hover: rgba(0, 0, 0, .2);
  --shadow: rgba(0, 0, 0, .18);
  color-scheme: light;
  --gutter: clamp(16px, 3.7vw, 64px);
  --col-gap: clamp(20px, 3.2vw, 56px);
  --ease-out: cubic-bezier(.22, .61, .36, 1);
  --ease-expo: cubic-bezier(.16, 1, .3, 1);
}

/* Dark theme: an explicit choice (data-theme) wins, otherwise follow the OS. */
:root[data-theme="dark"] {
  --ink: #f2f2f2; --muted: #8f8f8f; --line: #242424; --line-strong: #3a3a3a; --paper: #111111; --wash: #0a0a0a;
  --chip: rgba(26, 26, 26, .9); --chip-line: rgba(255, 255, 255, .1); --chip-line-hover: rgba(255, 255, 255, .28); --shadow: rgba(0, 0, 0, .6);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #f2f2f2; --muted: #8f8f8f; --line: #242424; --line-strong: #3a3a3a; --paper: #111111; --wash: #0a0a0a;
    --chip: rgba(26, 26, 26, .9); --chip-line: rgba(255, 255, 255, .1); --chip-line-hover: rgba(255, 255, 255, .28); --shadow: rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  transition: background-color .3s ease, color .3s ease;
  font-family: Poppins, system-ui, -apple-system, sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }
button { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }

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

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* Header */
.site-header {
  position: absolute; inset: 0 0 auto 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 26px var(--gutter);
}
.wordmark {
  font-size: 20px; font-weight: 500; letter-spacing: -0.04em; line-height: 1;
  text-decoration: none;
}
.site-nav { display: flex; align-items: center; gap: 14px; }
.nav-link {
  font-size: 11px; font-weight: 500; letter-spacing: .28em; text-transform: uppercase;
  text-decoration: none; padding: 8px 0 8px 8px;
}
.theme-toggle {
  appearance: none; display: inline-grid; place-items: center; width: 34px; height: 34px; margin-right: -8px;
  border: 0; border-radius: 50%; background: none; cursor: pointer; color: var(--ink);
  transition: background .25s ease;
}
.theme-toggle:hover { background: var(--wash); }
.theme-toggle svg { width: 16px; height: 16px; }

/* Intro */
.intro {
  transition: background-color .3s ease;
  min-height: min(76vh, 880px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 120px var(--gutter) 96px;
  background: var(--paper);
  text-align: center;
}
.eyebrow {
  margin: 0 0 26px;
  font-size: 12px; font-weight: 500; letter-spacing: .25em; text-transform: uppercase;
  color: var(--muted);
}
.intro-text {
  margin: 0; max-width: 23em;
  font-size: clamp(26px, 2.35vw + 8px, 42px); font-weight: 400; line-height: 1.38; letter-spacing: -0.015em;
  text-wrap: balance;
}
.intro .eyebrow, .intro-text { opacity: 0; transform: translateY(14px); animation: rise 1.1s var(--ease-expo) forwards; }
.intro-text { animation-delay: .12s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* Library */
.library { padding: 56px var(--gutter) 120px; scroll-margin-top: 0; }

.toolbar {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 24px;
  margin-bottom: 40px;
}
.filters { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.filter {
  appearance: none; border: 0; background: none; padding: 4px 0; cursor: pointer;
  font-size: 15px; color: var(--muted); letter-spacing: -0.005em;
  transition: color .25s ease;
}
.filter:hover { color: var(--ink); }
.filter[aria-pressed="true"] { color: var(--ink); }

.built { position: relative; display: flex; align-items: center; gap: 10px; flex: none; font-size: 15px; }
.built-label { color: var(--muted); }
.built-button {
  appearance: none; border: 0; background: none; padding: 4px 0; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
}
.built-button svg { width: 12px; height: 12px; transition: transform .3s var(--ease-out); }
.built-button[aria-expanded="true"] svg { transform: rotate(180deg); }
.built-menu {
  position: absolute; top: calc(100% + 10px); right: -12px; z-index: 20;
  min-width: 170px; margin: 0; padding: 8px; list-style: none;
  background: var(--paper); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 18px 40px -18px var(--shadow);
  transform-origin: top right; animation: menu-in .22s var(--ease-out);
}
@keyframes menu-in { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
.built-menu li {
  padding: 8px 12px; border-radius: 6px; cursor: pointer; font-size: 14px; color: var(--muted);
}
.built-menu li[aria-selected="true"] { color: var(--ink); }
.built-menu li:hover, .built-menu li.is-active { background: var(--wash); color: var(--ink); }

/* Masonry */
.masonry { display: flex; align-items: flex-start; gap: var(--col-gap); }
.masonry-col { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; gap: clamp(40px, 4.4vw, 80px); }

.card { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease-expo), transform .9s var(--ease-expo); transition-delay: var(--stagger, 0s); }
.card.is-in { opacity: 1; transform: none; }

.card-frame {
  position: relative; overflow: hidden;
  background: var(--paper); border: 1px solid var(--line); border-radius: 6px;
  transition: border-color .3s ease;
}
.card:hover .card-frame { border-color: var(--line-strong); }
.card-media { position: relative; overflow: hidden; }
.card-media img.poster {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 18%;
  opacity: .9; transition: opacity .6s ease;
}
.card-media iframe {
  position: absolute; top: 0; left: 0; border: 0;
  width: 200%; height: 200%; transform: scale(.5); transform-origin: 0 0;
  pointer-events: none; opacity: 0; transition: opacity .8s ease;
  background: var(--paper);
}
.card-media.is-loaded iframe { opacity: 1; }
.card-media.is-loaded img.poster { opacity: 0; }
.card-surface { position: absolute; inset: 0; z-index: 2; }

.card-actions {
  position: absolute; top: 12px; right: 12px; z-index: 3;
  display: flex; gap: 6px;
  opacity: 0; transform: translateY(-4px);
  transition: opacity .3s ease, transform .3s var(--ease-out);
}
.card:hover .card-actions, .card:focus-within .card-actions { opacity: 1; transform: none; }
@media (hover: none) { .card-actions { opacity: 1; transform: none; } }

.copy-button {
  appearance: none; height: 30px; padding: 0 12px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--chip-line); background: var(--chip); color: var(--ink);
  font-size: 10px; font-weight: 500; letter-spacing: .2em; text-transform: uppercase;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.copy-button:hover { background: var(--paper); border-color: var(--chip-line-hover); }
.copy-button:active { transform: scale(.96); }

.card-info { padding: 18px 2px 0; }
.card-title { margin: 0; font-size: 18px; font-weight: 400; letter-spacing: -0.01em; line-height: 1.3; }
.card-title a { text-decoration: none; background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .4s var(--ease-out); }
.card:hover .card-title a { background-size: 100% 1px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 8px 0 0; padding: 0; list-style: none; }
.card-tags li { font-size: 10px; font-weight: 500; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }

.empty { margin: 80px 0; text-align: center; color: var(--muted); }

/* Footer */
.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding: 28px var(--gutter) 36px; border-top: 1px solid var(--line);
  font-size: 12px; color: var(--muted);
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); }
.site-footer a:hover { border-color: var(--ink); }

/* Small screens */
@media (max-width: 900px) {
  .toolbar { flex-direction: column; gap: 18px; }
  .filters { flex-wrap: nowrap; overflow-x: auto; margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter) 6px; width: calc(100% + var(--gutter) * 2); scrollbar-width: none; }
  .filters::-webkit-scrollbar { display: none; }
  .filter { white-space: nowrap; }
  .built-menu { right: auto; left: -12px; transform-origin: top left; }
}
@media (max-width: 560px) {
  .intro { min-height: 78svh; padding-top: 110px; }
  .eyebrow { font-size: 11px; letter-spacing: .2em; margin-bottom: 20px; }
  .library { padding-top: 40px; }
  .card-title { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  .intro .eyebrow, .intro-text { animation: none; opacity: 1; transform: none; }
  .card { transition: none; opacity: 1; transform: none; }
}