:root {
  --bg: #0b0f14;
  --bg-soft: #11161d;
  --text: #e6ebf4;
  --muted: #a8b0c2;
  --brand: #6ee7ff;
  --accent: #9b8cff;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 40px rgba(0,0,0,0.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-soft: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --brand: #0ea5e9;
    --accent: #7c3aed;
    --card: rgba(0, 0, 0, 0.04);
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, rgba(110, 231, 255, 0.06), transparent 60%),
              radial-gradient(1200px 800px at 90% 10%, rgba(155, 140, 255, 0.08), transparent 60%),
              var(--bg);
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.site-header { position: sticky; top: 0; backdrop-filter: saturate(1.2) blur(12px); background: linear-gradient(180deg, rgba(0,0,0,0.14), rgba(0,0,0,0)); border-bottom: 1px solid var(--border); z-index: 10; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.brand .name { font-family: "Space Grotesk", Inter, system-ui; font-weight: 700; letter-spacing: 0.4px; margin: 0; }
.brand .tagline, .brand .focus { margin: 2px 0; color: var(--muted); font-size: 0.95rem; }

.nav a { color: var(--text); text-decoration: none; margin-left: 16px; padding: 8px 12px; border-radius: 10px; border: 1px solid transparent; transition: all 200ms ease; }
.nav a:hover { border-color: var(--border); background: var(--card); }

.hero { padding: 72px 0 40px; }
.hero .headline { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.15; letter-spacing: 0.2px; margin: 0; }
.hero .sub { color: var(--muted); font-size: 1.05rem; margin-top: 12px; }

.section { padding: 40px 0; }
.section h3 { font-family: "Space Grotesk", Inter, system-ui; font-size: 1.4rem; margin: 0 0 16px; letter-spacing: 0.3px; }
.section p { color: var(--text); }

.cards { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.card-link { text-decoration: none; color: inherit; grid-column: span 12; display: flex; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 18px; box-shadow: var(--shadow); transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease; cursor: pointer; display: flex; flex-direction: column; flex: 1; }
.card-link:hover .card { transform: translateY(-2px); box-shadow: 0 28px 60px rgba(0,0,0,0.45); border-color: var(--brand); }
.card-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.card h4 { margin: 0; font-size: 1.1rem; }
.badge { display: inline-block; font-size: 0.78rem; color: var(--brand); border: 1px solid var(--border); background: rgba(110, 231, 255, 0.08); padding: 4px 10px; border-radius: 999px; }
.meta { color: var(--muted); margin: 6px 0 12px; }
.bullets { margin: 0; padding-left: 18px; color: var(--text); flex: 1; }
.bullets li { margin: 6px 0; }

@media (min-width: 720px) {
  .card-link { grid-column: span 6; }
}

@media (min-width: 1020px) {
  .card-link { grid-column: span 4; }
}

.links { display: flex; flex-wrap: wrap; gap: 12px; }
.link { display: inline-flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; border: 1px solid var(--border); background: var(--card); padding: 12px 18px; border-radius: 12px; font-weight: 500; transition: all 200ms ease; }
.link:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(110, 231, 255, 0.15); }
.link::before { content: '→'; font-size: 1.2em; transition: transform 200ms ease; }
.link:hover::before { transform: translateX(3px); }

.profile-links { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.profile-item { display: flex; align-items: baseline; gap: 8px; }
.profile-label { font-weight: 600; color: var(--text); min-width: 100px; }
.profile-item a { color: var(--brand); text-decoration: none; word-break: break-all; transition: color 200ms ease; }
.profile-item a:hover { color: var(--accent); text-decoration: underline; }

.site-footer { border-top: 1px solid var(--border); margin-top: 24px; }
.site-footer .container { padding: 20px; color: var(--muted); }