/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg       : #0d1117;
  --surface  : #161b22;
  --surface2 : #21262d;
  --border   : #30363d;
  --text     : #e6edf3;
  --muted    : #7d8590;
  --accent   : #58a6ff;
  --radius   : 10px;
  --card-w   : 158px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,17,23,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}

.logo { font-size: 1.3rem; font-weight: 800; white-space: nowrap; letter-spacing: -.5px; }
.logo em { color: var(--accent); font-style: normal; }

.search-wrap { flex: 1; min-width: 180px; position: relative; }
.search-wrap svg {
  position: absolute; left: 10px; top: 50%;
  transform: translateY(-50%); color: var(--muted); pointer-events: none;
}
#search {
  width: 100%;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  padding: 7px 12px 7px 34px; font-size: .875rem; outline: none;
  transition: border-color .2s;
}
#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--muted); }

/* Sort select */
#sort-sel {
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px;
  padding: 7px 10px; font-size: .82rem; outline: none; cursor: pointer;
}
#sort-sel:focus { border-color: var(--accent); }

.count { color: var(--muted); font-size: .82rem; white-space: nowrap; }

/* Refresh button */
#refresh-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--muted); border-radius: 8px;
  padding: 7px 10px; font-size: .82rem; cursor: pointer;
  transition: border-color .2s, color .2s;
  white-space: nowrap;
}
#refresh-btn:hover  { border-color: var(--accent); color: var(--text); }
#refresh-btn.spin svg { animation: spin .7s linear infinite; }

/* ── Category tabs ───────────────────────────────────────────────────────── */
.cats-wrap {
  position: sticky; top: 53px; z-index: 99;
  background: rgba(13,17,23,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  overflow-x: auto; scrollbar-width: none;
}
.cats-wrap::-webkit-scrollbar { display: none; }
#cats { display: flex; gap: 4px; padding: 8px 20px; width: max-content; }

.cat-btn {
  border: none; border-radius: 20px; padding: 4px 13px;
  font-size: .78rem; font-weight: 600; cursor: pointer;
  background: var(--surface2); color: var(--muted);
  transition: background .15s, color .15s; white-space: nowrap;
}
.cat-btn:hover  { background: var(--border); color: var(--text); }
.cat-btn.active { background: var(--accent); color: #000; }
.cat-btn .n     { opacity: .65; font-weight: 400; margin-left: 3px; }

/* ── Grid ────────────────────────────────────────────────────────────────── */
#grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-w), 1fr));
  gap: 18px; padding: 20px;
}

/* ── Card ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  cursor: default;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0,0,0,.55);
  border-color: var(--accent);
}

/* ── Cover ───────────────────────────────────────────────────────────────── */
.cover {
  position: relative; width: 100%; aspect-ratio: 2/3; overflow: hidden;
}
.cover::after {
  content: '';
  position: absolute; inset: 40% 0 0 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,.78) 100%);
  pointer-events: none; z-index: 1;
}

.cover canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity .4s;
}
.cover canvas.loaded { opacity: 1; }

.placeholder {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.placeholder .initial {
  font-size: 3.5rem; font-weight: 900; line-height: 1;
  opacity: .15; user-select: none;
}

.spinner-ring {
  position: absolute; bottom: 36px;
  width: 22px; height: 22px;
  border: 2px solid rgba(255,255,255,.12);
  border-top-color: rgba(255,255,255,.5);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  z-index: 2;
}
.spinner-ring.hidden { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Cover badges ────────────────────────────────────────────────────────── */
.cover-badges {
  position: absolute; bottom: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 7px; z-index: 2;
}

.badge-cat {
  font-size: .62rem; font-weight: 700; letter-spacing: .03em;
  padding: 3px 8px; border-radius: 20px;
  text-transform: uppercase; max-width: 55%;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.badge-year {
  font-size: .68rem; font-weight: 700;
  color: rgba(255,255,255,.9);
  background: rgba(0,0,0,.45);
  padding: 2px 7px; border-radius: 20px;
  letter-spacing: .02em; white-space: nowrap;
  border: 1px solid rgba(255,255,255,.12);
}
.badge-year.none { color: rgba(255,255,255,.35); border-color: transparent; }

/* ── Card info ───────────────────────────────────────────────────────────── */
.info {
  padding: 9px 10px 4px; display: flex; flex-direction: column; gap: 3px;
  flex: 1;
}
.title {
  font-size: .77rem; font-weight: 500; line-height: 1.42; color: var(--text);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
}
.author {
  font-size: .7rem; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.open-btn {
  display: block; text-align: center; text-decoration: none;
  font-size: .72rem; font-weight: 600;
  padding: 6px 10px; margin: 8px 10px 10px;
  border-radius: 6px;
  background: transparent; color: var(--accent);
  border: 1px solid var(--border);
  transition: background .15s, border-color .15s, color .15s;
}
.open-btn:hover { background: var(--surface2); border-color: var(--accent); }

/* ── Empty state ─────────────────────────────────────────────────────────── */
#empty {
  display: none; grid-column: 1/-1;
  text-align: center; padding: 80px 20px; color: var(--muted);
}
#empty .icon { font-size: 3rem; margin-bottom: 12px; opacity: .4; }

/* ── Loading overlay ─────────────────────────────────────────────────────── */
#loading {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 16px; z-index: 999;
  color: var(--muted); font-size: 1rem;
}
#loading .ring {
  width: 46px; height: 46px;
  border: 3px solid var(--surface2); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite;
}