:root {
  --bg: #f6f4ef;
  --panel: #ffffff;
  --ink: #232120;
  --muted: #7a736c;
  --line: #e4dfd6;
  --accent: #b3541e;
  --accent-ink: #fff;
  --chip: #ece7dd;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171514;
    --panel: #201d1b;
    --ink: #ece8e3;
    --muted: #9b938a;
    --line: #322e2a;
    --accent: #e07a3f;
    --accent-ink: #1a1210;
    --chip: #2b2724;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: 40px;
}

#topbar {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  padding: 14px 18px 8px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}
#topbar h1 { font-size: 20px; margin: 0; cursor: pointer; white-space: nowrap; }
#search {
  flex: 1;
  min-width: 200px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  font-size: 16px;
}
#search:focus { outline: 2px solid var(--accent); border-color: transparent; }

#filters { padding: 4px 18px 10px; display: grid; gap: 6px; }
.filter-row { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
.filter-row::-webkit-scrollbar { display: none; }
.chip {
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--ink);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
}
.chip.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.chip .n { opacity: 0.6; font-size: 11px; margin-left: 3px; }

#grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 14px;
  padding: 6px 18px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: transform 0.08s ease;
}
.card:active { transform: scale(0.97); }
.card img { width: 100%; aspect-ratio: 8.5/9; object-fit: cover; object-position: top; background: #fff; border-bottom: 1px solid var(--line); }
.card .info { padding: 9px 11px 11px; }
.card .t { font-weight: 600; font-size: 14px; line-height: 1.25; }
.card .m { color: var(--muted); font-size: 12px; margin-top: 4px; }
.card .badges { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 4px; }
.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--muted);
}
.badge.key { background: var(--accent); color: var(--accent-ink); }

.empty { grid-column: 1/-1; text-align: center; color: var(--muted); padding: 60px 0; }

#viewer { position: fixed; inset: 0; background: var(--bg); z-index: 10; overflow-y: auto; }
#viewer-bar {
  position: sticky;
  top: 0;
  background: var(--bg);
  display: flex;
  gap: 12px;
  align-items: baseline;
  flex-wrap: wrap;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  z-index: 11;
}
#viewer-close {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
}
#viewer-title { font-weight: 700; font-size: 17px; }
#viewer-meta { color: var(--muted); font-size: 13px; flex-basis: 100%; }
#viewer-pages { max-width: 1000px; margin: 0 auto; padding: 14px; display: grid; gap: 14px; }
#viewer-pages img { width: 100%; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
#viewer-pages iframe { width: 100%; height: 85vh; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.pdf-note { text-align: center; }
.pdf-note a { color: var(--accent); font-weight: 600; }

#login {
  max-width: 320px;
  margin: 18vh auto;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  text-align: center;
}
#login input {
  width: 100%;
  font-size: 22px;
  text-align: center;
  letter-spacing: 6px;
  padding: 10px;
  margin: 14px 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
}
#login button {
  width: 100%;
  padding: 11px;
  font-size: 16px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}