/* Meine Bibliothek — vanilla CSS, light/dark via prefers-color-scheme. */

:root {
  --bg: #f7f7f5;
  --fg: #1f2328;
  --muted: #6b7280;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06);
  --radius: 10px;
  --max-w: 1400px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8d96a0;
    --card: #161b22;
    --border: #30363d;
    --accent: #58a6ff;
    --accent-fg: #0d1117;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Top bar / controls ---- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px 12px;
  backdrop-filter: saturate(140%) blur(6px);
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  max-width: var(--max-w);
  margin: 0 auto 12px;
  gap: 16px;
}

.title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.stats {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.controls {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  font-size: 16px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
}

.filter {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
  min-width: 0;
}

.filter select {
  appearance: none;
  -webkit-appearance: none;
  padding: 8px 30px 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  font-size: 14px;
  min-width: 140px;
  max-width: 220px;
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.filter select:focus {
  outline: none;
  border-color: var(--accent);
}

.reset {
  align-self: end;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  font-size: 14px;
  cursor: pointer;
}

.reset:hover { border-color: var(--accent); color: var(--accent); }

/* ---- Grid ---- */

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 24px; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cover {
  aspect-ratio: 2 / 3;
  width: 100%;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 20%, var(--card)) 0%, var(--card) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cover-placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 18px 14px;
  text-align: center;
  width: 100%;
  height: 100%;
  color: var(--fg);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 18%, var(--card)),
    color-mix(in srgb, var(--accent) 5%, var(--card)));
}

.cover-placeholder .ph-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.25;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
}

.cover-placeholder .ph-author {
  margin-top: 8px;
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-author {
  font-size: 12px;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  margin-top: auto;
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
}

.card-meta .rating {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.card-meta .rating::before {
  content: "★";
  color: #f5b400;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

/* ---- Detail dialog ---- */

dialog.detail {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  padding: 0;
  max-width: 800px;
  width: calc(100vw - 40px);
  max-height: calc(100vh - 80px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
}

dialog.detail::backdrop {
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
}

.detail-close {
  position: absolute;
  top: 8px;
  right: 12px;
  background: transparent;
  border: 0;
  color: var(--muted);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
.detail-close:hover { color: var(--fg); background: color-mix(in srgb, var(--fg) 10%, transparent); }

.detail-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 28px;
}

@media (min-width: 640px) {
  .detail-inner {
    grid-template-columns: 200px 1fr;
    gap: 28px;
  }
}

.detail-cover {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 2 / 3;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 18%, var(--card)),
    color-mix(in srgb, var(--accent) 5%, var(--card)));
}

.detail-cover img {
  width: 100%; height: 100%; object-fit: cover;
}

.detail-body h2 {
  margin: 0 0 6px;
  font-size: 22px;
  line-height: 1.25;
}

.detail-author {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 15px;
}

.detail-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  margin: 0 0 16px;
  font-size: 14px;
}

.detail-meta dt {
  color: var(--muted);
  font-weight: 400;
}

.detail-meta dd {
  margin: 0;
  color: var(--fg);
}

.detail-description {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre-wrap;
}

.detail-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 10px 18px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 14px;
}

.detail-link:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

/* ---- Footer ---- */

.footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}