:root {
  color-scheme: light;
  font-family: "Trebuchet MS", "Noto Sans TC", system-ui, sans-serif;
  color: #173b3f;
  background: #edf8f5;
  --ink: #173b3f;
  --teal: #005f73;
  --cream: #fff9e9;
  --coral: #e76f51;
  --line: rgba(23, 59, 63, 0.17);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 20% 0%, #fffdf2 0 22rem, transparent 44rem), #edf8f5; }
a, button, select { font: inherit; }

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.75rem;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, calc((100vw - 76rem) / 2));
  color: white;
  background: var(--teal);
}
.library-home { color: inherit; font-weight: 800; text-underline-offset: 0.25em; }
.library-language { display: flex; align-items: center; gap: 0.65rem; font-weight: 700; }
.library-language select { min-height: 2.75rem; padding: 0 2.2rem 0 0.8rem; border: 2px solid rgba(255,255,255,.55); border-radius: 999px; color: var(--ink); background: white; }

.library-main { width: min(76rem, calc(100% - 2rem)); margin: 0 auto; padding: clamp(2.5rem, 7vw, 5.5rem) 0 max(4rem, env(safe-area-inset-bottom)); }
.library-intro { max-width: 48rem; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.library-kicker { margin: 0 0 .65rem; color: var(--coral); font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.library-intro h1 { margin: 0; font-size: clamp(2.4rem, 8vw, 5.6rem); line-height: .95; letter-spacing: -.045em; }
.library-intro p:last-child { max-width: 38rem; margin: 1.2rem 0 0; font-size: clamp(1rem, 2.5vw, 1.35rem); line-height: 1.6; }

.library-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); gap: clamp(1.25rem, 3vw, 2rem); align-items: stretch; }
.library-card { display: flex; flex-direction: column; overflow: hidden; min-width: 0; border: 1px solid var(--line); border-radius: 1.6rem; background: var(--cream); box-shadow: 0 1rem 2.2rem rgba(23, 59, 63, .1); }
.library-card__cover-link { display: block; aspect-ratio: 3 / 4; overflow: hidden; background: #d8ece8; }
.library-card__cover { display: block; width: 100%; height: 100%; object-fit: cover; }
.library-card__content { display: flex; flex: 1; flex-direction: column; align-items: flex-start; padding: 1.25rem; }
.library-card__badges { display: flex; flex-wrap: wrap; gap: .45rem; }
.library-badge { padding: .36rem .65rem; border-radius: 999px; font-size: .78rem; font-weight: 900; background: #d9eee8; }
.library-badge--demo { color: #7c3d16; background: #ffe0bf; }
.library-badge--draft { color: #61458c; background: #eaddff; }
.library-badge--access { color: #174b67; background: #dceefa; }
.library-card__title { margin: 1rem 0 .35rem; font-size: clamp(1.35rem, 3vw, 1.75rem); line-height: 1.18; }
.library-card__trial { margin: 0 0 1.1rem; color: #4d6566; }
.library-card__button, .library-state button { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; margin-top: auto; padding: .7rem 1.05rem; border: 0; border-radius: .85rem; color: white; background: var(--teal); font-weight: 900; text-decoration: none; cursor: pointer; }
.library-card__cover-link:focus-visible, .library-card__button:focus-visible, .library-home:focus-visible, .library-language select:focus-visible, .library-state button:focus-visible { outline: 4px solid #ffb703; outline-offset: 4px; }
.library-state { padding: clamp(2rem, 7vw, 4rem); border: 1px dashed var(--line); border-radius: 1.5rem; text-align: center; background: rgba(255,255,255,.7); }
.library-state h2 { margin-top: 0; }
.library-state button { margin-top: .6rem; }
.library-loader { display: inline-block; width: 2.5rem; height: 2.5rem; border: .35rem solid #b9d8d3; border-top-color: var(--teal); border-radius: 50%; animation: library-spin .8s linear infinite; }
@keyframes library-spin { to { transform: rotate(360deg); } }

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .library-card { transition: transform .18s ease, box-shadow .18s ease; }
  .library-card:hover { transform: translateY(-.25rem); box-shadow: 0 1.3rem 2.6rem rgba(23, 59, 63, .15); }
}
@media (prefers-reduced-motion: reduce) { .library-loader { animation: none; border-top-color: #b9d8d3; } }
@media (max-width: 42rem) {
  .library-header { align-items: flex-start; padding-inline: 1rem; }
  .library-language { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .library-language span { font-size: .78rem; }
  .library-main { width: min(100% - 1.25rem, 76rem); }
}