:root {
  --bg: #0B0B0C;
  --surface: #141416;
  --elevated: #1A1A1D;
  --border: #2A2A2D;
  --border-strong: #3A3A3D;
  --text: #EDEDED;
  --text-dim: #A1A1A6;
  --muted: #6B6B6F;
  --accent: #EF9529;
  --green: #34C759;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, sans-serif;
  line-height: 1.6;
  padding: 48px 24px;
}

header, main, .searchbar { max-width: 1000px; margin-left: auto; margin-right: auto; }

h1 { font-size: 32px; font-weight: 600; letter-spacing: -0.02em; }
.sub { color: var(--text-dim); margin-top: 8px; }

.searchbar { margin-top: 32px; position: relative; }   /* anchor for the × button */

#search {
  width: 100%;
  padding: 14px 44px 14px 18px;      /* right padding leaves room for × */
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;              /* inputs ignore body font unless told */
  outline: none;
  transition: border-color 0.15s;
}

#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--muted); }
#search::-webkit-search-cancel-button { display: none; }   /* hide chrome's own × */

#clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}

#clear:hover { color: var(--text); }

.filters {
  max-width: 1000px;
  margin: 20px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;               /* pill shape */
  padding: 5px 14px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.filter:hover { border-color: var(--border-strong); color: var(--text); }

.filter.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0B0B0C;                    /* dark text on orange */
}

#count {
  color: var(--muted);
  font-size: 13px;
  margin-top: 24px;
  min-height: 20px;                  /* stops the layout jumping */
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  text-decoration: none;             /* it's a link now, kill the underline */
  color: inherit;                    /* and the blue */
}

.card:hover { border-color: var(--border-strong); background: var(--elevated); }

.card:focus-visible {                /* keyboard users only */
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card h2 { font-size: 17px; font-weight: 500; margin-bottom: 10px; }

.card p {
  color: var(--text-dim);
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 5;             /* clip at 5 lines */
  line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;                           /* pushes the meta row to the bottom */
}

.match {
  display: inline-flex;              /* hugs its text instead of stretching */
  align-items: center;
  gap: 6px;
  background: rgba(52, 199, 89, 0.12);
  border: 1px solid rgba(52, 199, 89, 0.3);
  color: var(--green);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  margin-top: 12px;
  align-self: flex-start;
}

.match::before { content: "✓"; font-size: 11px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }

.tag {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--text-dim);
}

.tag.clickable { cursor: pointer; }
.tag.clickable:hover { border-color: var(--accent); color: var(--text); }

.meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.download {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
}

.download:hover { text-decoration: underline; }

#status { color: var(--text-dim); margin-top: 24px; }
#status:empty { display: none; }

.skeleton {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  height: 200px;
  animation: pulse 1.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50%      { opacity: 0.7; }
}

@media (max-width: 600px) {
  body { padding: 32px 16px; }
  h1 { font-size: 26px; }
  .card { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton { animation: none; }
}

.paper-wrap { max-width: 900px; margin: 0 auto; }

.back {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  display: inline-block;
  margin-bottom: 32px;
}

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

#title { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; }

.actions { display: flex; gap: 10px; margin-top: 24px; }

.btn {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #0B0B0C;                    /* dark text on orange */
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}

.btn-ghost {
  background: none;
  border-color: var(--border);
  color: var(--text-dim);
}

.btn-ghost:hover { border-color: var(--border-strong); color: var(--text); }

.viewer {
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;                  /* keeps the iframe inside the rounded corners */
  background: var(--surface);
}

.viewer iframe {
  width: 100%;
  height: 80vh;                      /* 80% of the window height */
  border: none;
  display: block;                    /* removes the gap iframes leave underneath */
}

.viewer-fallback { padding: 40px 24px; text-align: center; color: var(--text-dim); }

.related-heading {
  font-size: 18px;
  font-weight: 500;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

@media (max-width: 700px) {
  .viewer iframe { height: 60vh; }
  #title { font-size: 22px; }
  .actions { flex-wrap: wrap; }
}