:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c1f24;
  --muted: #5f6673;
  --border: #e2e5ea;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --danger-bg: #fdecec;
  --danger-text: #9b1c1c;
  --shadow: 0 1px 2px rgba(0,0,0,.05);
  --shadow-hover: 0 6px 18px rgba(0,0,0,.10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #171b21;
    --text: #e8eaee;
    --muted: #9aa3b0;
    --border: #2a3039;
    --accent: #6ea8ff;
    --accent-soft: #1b2a44;
    --danger-bg: #3a1a1a;
    --danger-text: #ffb3b3;
    --shadow: 0 1px 2px rgba(0,0,0,.4);
    --shadow-hover: 0 8px 20px rgba(0,0,0,.5);
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.site-header {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.brand { display: flex; align-items: center; gap: .9rem; }
.lab-logo { height: 44px; width: auto; }
h1 { margin: 0; font-size: 1.35rem; letter-spacing: -.01em; }
.tagline { margin: 0; color: var(--muted); font-size: .9rem; }

.search { flex: 1 1 260px; max-width: 420px; }
.search input {
  width: 100%; padding: .6rem .9rem;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text); font: inherit;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

main { padding: 1.5rem clamp(1rem, 4vw, 3rem) 3rem; max-width: 1200px; margin: 0 auto; }

.banner {
  padding: .9rem 1.1rem; border-radius: 10px;
  background: var(--danger-bg); color: var(--danger-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9rem;
}
.empty { color: var(--muted); }

.category { margin-bottom: 2rem; }
.category-title {
  margin: 0 0 .75rem; font-size: .8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em; color: var(--muted);
}
.grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
@media (max-width: 480px) { .grid { grid-template-columns: 1fr; } }

.card {
  display: flex; gap: .9rem; align-items: flex-start;
  padding: 1rem 1.1rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: var(--shadow);
  color: inherit; text-decoration: none;
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.card:hover, .card:focus-visible {
  transform: translateY(-2px); box-shadow: var(--shadow-hover);
  border-color: var(--accent); outline: none;
}
.card-icon {
  flex: 0 0 44px; height: 44px; display: grid; place-items: center;
  font-size: 1.5rem; border-radius: 10px; background: var(--accent-soft);
}
.card-icon img { width: 28px; height: 28px; object-fit: contain; }
.card-body { display: flex; flex-direction: column; gap: .15rem; min-width: 0; }
.card-name { font-weight: 600; }
.card-desc { color: var(--muted); font-size: .92rem; }
.card-url {
  color: var(--accent); font-size: .8rem; margin-top: .25rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}