/* Minimal, accessible, and responsive CSS */
:root {
  --bg: #ffffff;
  --text: #1b1b1f;
  --muted: #5b5b66;
  --primary: #0a7cff;
  --card: #f6f8fa;
  --border: #e6e8ec;
  --focus: #ffcc00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f13;
    --text: #e8e9ed;
    --muted: #a6a7ad;
    --primary: #4da3ff;
    --card: #151821;
    --border: #242735;
    --focus: #ffe066;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container { max-width: 1100px; margin-inline: auto; padding: 0 16px; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(120%) blur(6px);
  background: color-mix(in oklab, var(--bg), transparent 10%);
}

.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 16px; }
.brand { font-weight: 700; font-size: 1.1rem; letter-spacing: .02em; color: var(--text); }
.nav a { margin-left: 16px; color: var(--muted); }
.nav a:hover { color: var(--text); }

.hero { padding: 28px 0 14px 0; }
.hero h1 { margin: 0 0 6px 0; font-size: clamp(1.75rem, 2.4vw + 1rem, 2.4rem); }
.lede { margin: 0 0 14px 0; color: var(--muted); }
.controls { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; margin-top: 10px; }
.controls input[type="search"] {
  flex: 1 1 260px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text);
}
.controls select { padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.count { margin-top: 8px; color: var(--muted); }

.card-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin: 20px 0 60px; }
.card {
  border: 1px solid var(--border); background: var(--card); border-radius: 12px; padding: 16px;
  display: grid; gap: 8px; min-height: 160px;
}
.card h3 { margin: 0; font-size: 1.05rem; line-height: 1.3; }
.meta { font-size: .9rem; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.tag { font-size: .75rem; padding: 4px 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; color: var(--muted); }
.actions { margin-top: 8px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 8px 10px; border-radius: 8px;
  background: var(--primary); color: white; border: 1px solid color-mix(in oklab, var(--primary), black 10%);
}
.btn.secondary { background: transparent; color: var(--primary); border: 1px solid var(--border); }
.btn:hover { filter: brightness(1.04); text-decoration: none; }

.site-footer { border-top: 1px solid var(--border); }
.footer-inner { padding: 40px 0; color: var(--muted); }

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