:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --faint: #9a9a9f;
  --line: #e6e6e2;
  --line-soft: #eeeeeb;
  --accent: #2b6cb0;
  --pill: #eef1f8;
  --pill-ink: #3a4a63;
  --radius: 10px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scrollbar-gutter: stable; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-tap-highlight-color: transparent;
}
img { max-width: 100%; }
a { color: var(--accent); }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 20px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Toolbar */
.toolbar { position: sticky; top: 0; z-index: 20; background: rgba(247,247,245,.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.toolbar-inner { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; padding: 12px 20px; }
#search {
  flex: 1 1 240px; min-width: 0; padding: 9px 14px; font-size: 14px;
  border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--ink);
}
#search:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.sort { display: flex; align-items: center; }
#sort {
  appearance: none; -webkit-appearance: none;
  padding: 9px 34px 9px 14px; font-size: 14px; color: var(--ink); cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px;
  background: #fff url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='12'%20height='12'%20viewBox='0%200%2024%2024'%20fill='none'%20stroke='%236e6e73'%20stroke-width='2.5'%20stroke-linecap='round'%20stroke-linejoin='round'%3E%3Cpath%20d='M6%209l6%206%206-6'/%3E%3C/svg%3E") no-repeat right 13px center;
}
#sort:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }

/* Grid */
.grid { display: grid; gap: 20px; padding: 22px 0 40px; grid-template-columns: 1fr; }
@media (min-width: 440px)  { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 640px)  { .grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .grid { grid-template-columns: repeat(4, 1fr); } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; cursor: pointer; transition: box-shadow .15s, border-color .15s;
}
.card:hover { border-color: #d7d7d2; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card figure { margin: 0; }

/* Cover image */
.cover {
  aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center;
  padding: 18px; background: #fff; border: 1px solid var(--line-soft); border-radius: 8px; overflow: hidden;
}
.cover img { width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; }
.cover-img { pointer-events: none; }

/* Card text */
figcaption { padding: 14px 4px 2px; }
.common { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: -.01em; }
.field-label { margin: 14px 0 3px; font-size: 11px; font-weight: 500; color: var(--faint); text-transform: none; }
.sci { margin: 0; font-size: 14px; color: #333; }
.notes { margin: 0; font-size: 13px; line-height: 1.45; color: var(--muted); }

/* Thumbnails */
.thumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.thumb {
  width: 30px; height: 30px; object-fit: contain; padding: 3px;
  border: 1px solid var(--line-soft); border-radius: 6px; background: #fff; cursor: pointer;
  transition: border-color .1s;
}
.thumb:hover, .thumb.active { border-color: var(--accent); }
.more { font-size: 12px; color: var(--faint); }

.empty { text-align: center; color: var(--muted); padding: 56px 0; }

#sort:focus-visible, .btn:focus-visible, .modal-close:focus-visible,
.cc0-badge:focus-visible, .foot-link:focus-visible, .cite-link:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* Sticky brand/license footer */
body { padding-bottom: 52px; }
.site-footer {
  position: fixed; inset: auto 0 0 0; z-index: 30;
  background: rgba(247,247,245,.92); backdrop-filter: blur(8px); border-top: 1px solid var(--line);
}
.footer-inner { display: flex; align-items: center; gap: 12px; padding: 8px 20px; font-size: 12.5px; }
.cc0-badge { flex: none; display: inline-flex; align-items: center; gap: 4px; color: var(--ink); text-decoration: none; }
.cc0-badge svg { display: block; width: 22px; height: 22px; }
.cc0-badge:hover { opacity: .65; }
.foot-link { margin-left: auto; flex: none; color: var(--muted); text-decoration: none; font-weight: 500; }
.foot-link:hover { color: var(--ink); }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal[hidden] { display: none; }
.modal:not([hidden]) { animation: modal-fade .14s ease both; }
.modal:not([hidden]) .modal-panel { animation: modal-rise .16s ease both; }
@keyframes modal-fade { from { opacity: 0; } }
@keyframes modal-rise { from { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) {
  .modal:not([hidden]), .modal:not([hidden]) .modal-panel { animation: none; }
}
.modal-backdrop { position: absolute; inset: 0; background: rgba(20,20,20,.5); }
.modal-panel {
  position: relative; background: #fff; border-radius: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.3);
  width: 100%; max-width: 760px; max-height: 92vh; overflow: auto; padding: 26px; -webkit-overflow-scrolling: touch;
}
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border-radius: 8px;
  border: 1px solid var(--line); background: #fff; cursor: pointer; font-size: 15px; color: var(--ink); line-height: 1;
}
.modal-close:hover { background: #f2f2f0; }
.modal-head { padding-right: 40px; margin-bottom: 20px; }
.modal-head .common { font-size: 24px; }
.modal-head .sci { font-size: 15px; }
.modal-head .notes { margin-top: 0; }
.cite-note { margin: 0; font-size: 13px; line-height: 1.5; color: var(--muted); }
.cite-link { font: inherit; color: var(--accent); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; }
.cite-link:hover { color: var(--ink); }
.cite-icon { display: inline-flex; vertical-align: -2px; margin-left: 4px; }
.cite-link.copied { color: #1a7f37; text-decoration: none; }
.tiles { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
.tile { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; display: flex; flex-direction: column; }
.tile .cover { border: 0; border-bottom: 1px solid var(--line-soft); border-radius: 0; aspect-ratio: 4 / 3; padding: 14px; }
.tile-meta { padding: 10px 12px; display: flex; flex-direction: column; gap: 9px; }
.tile-fmt-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tile-label { font-size: 13px; font-weight: 600; }
.tile-fmt { font-size: 11px; color: var(--muted); }
.btn {
  display: inline-block; text-align: center; padding: 8px 12px; border-radius: 8px; font-size: 13px;
  text-decoration: none; background: var(--accent); color: #fff; border: 1px solid var(--accent); cursor: pointer;
}
.btn:hover { filter: brightness(1.06); }
.btn-block { display: block; width: 100%; margin-top: 16px; padding: 11px; font-size: 14px; }

@media (max-width: 520px) {
  .modal-panel { padding: 18px; }
}