/* 공식 라이브러리 페이지 — library.stevecoding.kr 디자인(globals.css)을 옮겨 옴. .lib 안에서만 적용 */
.lib {
  /* B 디자인 토큰(theme.css)에 맞춤 */
  --lib-bg: var(--b-bg);
  --lib-bg2: var(--b-bg);
  --lib-card: var(--b-surface);
  --lib-card-hover: var(--b-raised);
  --lib-text: var(--b-text);
  --lib-text2: var(--b-muted);
  --lib-muted: var(--b-faint);
  --lib-blue: var(--b-accent);
  --lib-orange: var(--b-challenge);
  --lib-border: var(--b-border);
  --lib-radius: 12px;
  --lib-radius-sm: 8px;
  background: var(--lib-bg);
  color: var(--lib-text);
}
.lib *, .lib *::before, .lib *::after { box-sizing: border-box; }

/* 머리띠 */
.lib-head-inner {
  max-width: 1196px; padding: 32px 32px 0; box-sizing: border-box;
  display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.lib-head h1 { margin: 0; font-size: 30px; font-weight: 700; color: var(--lib-text); }
.lib-head p { margin: 8px 0 0; font-size: 15px; color: var(--lib-text2); }
.lib-stats { display: flex; gap: 8px; font-family: var(--b-mono); font-size: 13px; }
.lib-stats span { padding: 6px 10px; border-radius: 8px; background: var(--lib-card); border: 1px solid var(--lib-border); color: var(--lib-text); }
.lib-stats .stat-lesson { color: var(--b-lesson); }
.lib-stats .stat-challenge { color: var(--b-challenge); }

/* 배치 */
/* 영상·건축물처럼 화면 끝까지 쓰고, 카드 수는 창 너비에 따라 저절로 바뀐다(2026-10-22) */
.lib-main { padding: 26px 32px 0; box-sizing: border-box; display: flex; gap: 28px; }
.lib-sidebar {
  width: 260px; flex-shrink: 0; align-self: flex-start;
  position: sticky; top: 24px; max-height: calc(100vh - 48px); overflow-y: auto;
  scrollbar-width: thin;
}
.lib-content { flex: 1; min-width: 0; scroll-margin-top: 16px; }

/* 사이드바 칸 */
.lib-section {
  background: var(--lib-card); border: 1px solid var(--lib-border);
  border-radius: var(--lib-radius); padding: 1.25rem; margin-bottom: 1rem;
}
.lib-section h3 { margin: 0 0 .75rem; font-size: 12px; font-weight: 700; color: var(--lib-text2); }
.lib-section-scroll { max-height: 260px; overflow-y: auto; scrollbar-width: thin; }

.lib-search { position: relative; }
.lib-search span { position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); color: var(--lib-muted); font-size: .9rem; }
.lib-search input {
  width: 100%; padding: .6rem .75rem .6rem 2.25rem;
  background: var(--lib-bg); border: 1px solid var(--lib-border); border-radius: var(--lib-radius-sm);
  color: var(--lib-text); font: inherit; font-size: .9rem; outline: none;
}
.lib-search input:focus { border-color: var(--lib-blue); }
.lib-hint { margin: .5rem 0 0; font-size: .72rem; color: var(--lib-muted); line-height: 1.4; }

.lib-chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.lib-chip {
  padding: .3rem .65rem; border-radius: 20px; font: inherit; font-size: .78rem; font-weight: 500;
  border: 1px solid var(--lib-border); background: var(--lib-bg); color: var(--lib-text2);
  cursor: pointer; transition: all .2s;
}
.lib-chip:hover { border-color: var(--lib-blue); color: var(--lib-text); }
.lib-chip.active { background: var(--b-accent); border-color: var(--b-accent); color: var(--b-accent-ink); font-weight: 700; }
.lib-chip.active.lesson { background: var(--b-lesson); border-color: var(--b-lesson); }
.lib-chip.active.challenge { background: var(--b-challenge); border-color: var(--b-challenge); }
.lib-chip.active.world { background: #22c55e; border-color: #22c55e; }
.lib-chip.active.none { background: var(--b-muted); border-color: var(--b-muted); }
.lib-chip-wide { width: 100%; padding: .5rem; }

.lib-select {
  width: 100%; padding: .5rem .75rem; background: var(--lib-bg); color: var(--lib-text);
  border: 1px solid var(--lib-border); border-radius: var(--lib-radius-sm); font: inherit; font-size: .85rem; cursor: pointer;
}
.lib-select:disabled { opacity: .5; cursor: not-allowed; }

/* 목록 머리 */
.lib-list-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.lib-list-head h2 { margin: 0; font-size: 1.15rem; font-weight: 600; color: var(--lib-text); }
.lib-count { font-size: .85rem; color: var(--lib-muted); }

/* 카드 격자 */
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr)); gap: 1.25rem; }
.lib-card {
  display: block; overflow: hidden; color: inherit; text-decoration: none;
  background: var(--lib-card); border: 1px solid var(--lib-border); border-radius: var(--lib-radius);
  transition: all .25s ease;
}
.lib-card:hover { transform: translateY(-3px); border-color: var(--lib-blue); box-shadow: 0 8px 30px rgba(0, 0, 0, .35); }
.lib-thumb { display: block; width: 100%; height: 160px; object-fit: cover; background: var(--lib-bg2); }
.lib-thumb-empty {
  display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
  background: linear-gradient(135deg, var(--lib-bg2), var(--lib-card));
}
.lib-card-body { padding: 1rem; }
.lib-badge {
  display: inline-block; margin-bottom: .5rem; padding: .2rem .5rem; border-radius: 6px;
  font-size: .7rem; font-weight: 600; letter-spacing: .03em;
}
.badge-lesson { background: #1E2D45; color: var(--b-lesson); }
.badge-challenge { background: #3A2C12; color: var(--b-challenge); }
.badge-world { background: var(--b-accent-soft); color: var(--b-accent); }
.lib-title {
  margin: 0 0 .5rem; font-size: .95rem; font-weight: 600; line-height: 1.3; color: var(--lib-text);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.lib-desc {
  margin: 0 0 .75rem; font-size: .8rem; line-height: 1.5; color: var(--lib-text2);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.lib-tags { display: flex; flex-wrap: wrap; gap: .3rem; margin-bottom: .5rem; }
.lib-tag { padding: 2px 8px; border-radius: 6px; font-size: 12px; background: var(--b-raised); color: #C9CDD3; overflow-wrap: anywhere; }
.lib-tag-orange { background: #2A2416; color: var(--b-challenge); }
.lib-meta { font-size: .72rem; color: var(--lib-muted); }

.lib-empty { padding: 4rem 2rem; text-align: center; color: var(--lib-text2); }
.lib-empty div { font-size: 3rem; margin-bottom: 1rem; }
.lib-loading { padding: 4rem 2rem; text-align: center; color: var(--lib-text2); }

/* 페이지 넘김 */
.lib-pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .35rem; margin-top: 2rem; padding: 1rem 0 0; }
.lib-pagination button {
  min-width: 38px; padding: .45rem .75rem; border-radius: var(--lib-radius-sm);
  border: 1px solid var(--lib-border); background: var(--lib-card); color: var(--lib-text2);
  font: inherit; font-size: .85rem; cursor: pointer; transition: all .2s;
}
.lib-pagination button:hover:not(:disabled) { border-color: var(--lib-blue); color: var(--lib-blue); }
.lib-pagination button.active { background: var(--b-accent); border-color: var(--b-accent); color: var(--b-accent-ink); }
.lib-pagination button:disabled { opacity: .4; cursor: not-allowed; }
.lib-gap { color: var(--lib-muted); padding: 0 .25rem; }
.lib-page-info { margin: .5rem 0 0; text-align: center; font-size: .8rem; color: var(--lib-muted); }

.lib-source { padding: 1.5rem 2rem 2.5rem; text-align: center; font-size: .82rem; color: var(--lib-muted); }
.lib-source a { color: var(--lib-blue); text-decoration: none; }

@media (max-width: 768px) {
  .lib-main { flex-direction: column; padding: 16px 16px 0; }
  .lib-head-inner { padding: 20px 16px 0; }
  .lib-head h1 { font-size: 24px; }
  .lib-stats { display: none; }
  .lib-sidebar { width: 100%; position: static; max-height: none; }
  .lib-grid { grid-template-columns: 1fr; }
}