:root {
  color-scheme: dark light;

  --bg: #0b1220;
  --bg-elev: #111a2e;
  --bg-elev-2: #16223b;
  --border: #1f2c4a;
  --text: #e6edf7;
  --text-dim: #94a3b8;
  --accent: #6ea8ff;
  --accent-fg: #06122a;
  --danger: #ef4444;
  --selected: #2b3d6b;
  --shadow: 0 6px 20px -8px rgba(0, 0, 0, 0.6);
  --radius: 12px;
  --radius-sm: 8px;
  --gap: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-elev: #ffffff;
    --bg-elev-2: #f1f5f9;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-dim: #64748b;
    --accent: #2563eb;
    --accent-fg: #ffffff;
    --selected: #dbeafe;
    --shadow: 0 6px 20px -10px rgba(15, 23, 42, 0.15);
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.muted {
  color: var(--text-dim);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px 12px;
}

.title-block h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.title-block p {
  margin: 2px 0 12px;
  color: var(--text-dim);
  font-size: 13px;
}

.controls {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) auto auto;
  gap: 10px;
  align-items: stretch;
}

@media (max-width: 640px) {
  .controls {
    grid-template-columns: 1fr 1fr;
  }
  .controls .search {
    grid-column: 1 / -1;
  }
}

.search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  height: 38px;
}

.search input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--text);
  font: inherit;
  outline: none;
  min-width: 0;
}

.filter {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.filter summary {
  list-style: none;
  cursor: pointer;
  padding: 0 12px;
  height: 38px;
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.filter summary::-webkit-details-marker { display: none; }

.filter[open] summary {
  border-bottom: 1px solid var(--border);
}

.filter-options {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 200px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 20;
}

.filter-options label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
}

.filter-options label:hover {
  background: var(--bg-elev-2);
}

.sort {
  display: flex;
}

.sort select {
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  height: 38px;
  padding: 0 10px;
  font: inherit;
}

.result-count {
  margin: 10px 0 0;
  color: var(--text-dim);
  font-size: 13px;
}

/* Grid */
main {
  padding: 16px 20px 120px;
}

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--gap);
}

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

/* Card */
.card {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.08s ease, border-color 0.15s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.card.selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-elev));
}

.card .thumb {
  aspect-ratio: 4 / 3;
  background: var(--bg-elev-2);
  display: block;
  width: 100%;
  object-fit: cover;
}

.card .body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.card h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.005em;
}

.card .meta {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.card .badges {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: auto;
}

.badge {
  display: inline-block;
  padding: 2px 7px;
  font-size: 11px;
  border-radius: 999px;
  background: var(--bg-elev-2);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.badge.source {
  color: var(--text);
}

button.tag-chip {
  font: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
button.tag-chip:hover,
button.tag-chip:focus-visible {
  background: var(--bg-elev-3, var(--bg-elev-2));
  color: var(--text);
  border-color: var(--text-dim);
  outline: none;
}

.card .actions {
  display: flex;
  gap: 6px;
  padding: 0 12px 12px;
}

.card .actions.actions-stacked {
  flex-direction: column;
}

.card .actions button,
.card .actions .btn-link {
  flex: 1;
}

/* Variant chips inside per-file download buttons */
.variant-chips {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

.variant-chip {
  display: inline-block;
  padding: 1px 6px;
  font-size: 10px;
  font-weight: 500;
  line-height: 1.4;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 12%, transparent);
  color: inherit;
  border: 1px solid color-mix(in srgb, var(--text) 18%, transparent);
}

/* On the primary (single-file) button, the surrounding accent fill is
   already strong, so chips look better with a subtler tint. */
button.primary .variant-chip,
a.btn-link.primary .variant-chip {
  background: color-mix(in srgb, var(--accent-fg) 18%, transparent);
  border-color: color-mix(in srgb, var(--accent-fg) 30%, transparent);
}

/* Select checkbox overlay */
.card .select {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 28px;
  height: 28px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s ease;
  backdrop-filter: blur(4px);
}

.card .select:hover {
  background: rgba(0, 0, 0, 0.65);
}

.card.selected .select {
  background: var(--accent);
  border-color: var(--accent);
}

.card .select svg {
  width: 16px;
  height: 16px;
  color: white;
  opacity: 0;
}

.card.selected .select svg {
  opacity: 1;
}

/* Buttons */
button,
a.btn-link {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  transition: background 0.12s ease, border-color 0.12s ease;
}

a.btn-link {
  display: block;
  text-align: center;
  text-decoration: none;
}

button:hover,
a.btn-link:hover {
  background: color-mix(in srgb, var(--accent) 15%, var(--bg-elev-2));
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

button.primary,
a.btn-link.primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

button.primary:hover,
a.btn-link.primary:hover {
  filter: brightness(1.05);
}

button.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-dim);
}

button.ghost:hover {
  color: var(--text);
}

/* Sticky toolbar */
.toolbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px;
  z-index: 60;
  pointer-events: none;
  animation: slide-up 0.18s ease;
}

@keyframes slide-up {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.toolbar-inner {
  pointer-events: auto;
  margin: 0 auto;
  max-width: 720px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.toolbar-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

@media (max-width: 520px) {
  .toolbar-inner {
    flex-direction: column;
    align-items: stretch;
  }
  .toolbar-actions {
    justify-content: stretch;
  }
  .toolbar-actions button {
    flex: 1;
  }
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 90px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  z-index: 100;
  box-shadow: var(--shadow);
  animation: toast-in 0.15s ease;
}

@keyframes toast-in {
  from { transform: translate(-50%, 8px); opacity: 0; }
  to { transform: translate(-50%, 0); opacity: 1; }
}