/* Base */
:root {
  --bg: #0d0f14;
  --panel: #11151d;
  --text: #e6ecf2;
  --muted: #9fb0c0;
  --brand: #61dafb;
  --accent: #7aa2ff;
  --border: #1f2632;
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --panel: #ffffff;
    --text: #0b1220;
    --muted: #445066;
    --brand: #0ea5e9;
    --accent: #2563eb;
    --border: #e6ecf2;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(1000px 600px at 10% -10%, #123, transparent 60%),
              radial-gradient(800px 500px at 120% 10%, #221133, transparent 50%),
              var(--bg);
}

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

.container { max-width: 1100px; margin: 0 auto; padding: 1.25rem; }

/* Header */
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; color: var(--text); }
.brand img { display: block; }
.site-nav a { color: var(--text); opacity: .9; margin-left: 1rem; }
.site-nav a:hover { opacity: 1; }

/* Hero */
.hero { padding: 4rem 1.25rem 2rem; text-align: left; }
.hero h1 { font-size: clamp(1.8rem, 3.5vw, 3rem); line-height: 1.2; margin: 0 0 .75rem; }
.hero p { color: var(--muted); margin: 0 0 1.25rem; }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.5rem;
  padding: 0 .9rem;
  border-radius: .6rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 0 rgba(255,255,255,.05) inset, 0 10px 30px rgba(0,0,0,.12);
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn.primary { background: linear-gradient(180deg, var(--accent), color-mix(in oklab, var(--accent), black 15%)); border-color: transparent; }
.btn.subtle { background: transparent; }
.btn[disabled] { opacity: .6; cursor: not-allowed; }

/* Cards */
.projects { padding: 1rem 1.25rem 3rem; }
.projects h2 { margin: 0 0 1rem; font-size: 1.4rem; }
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.card {
  grid-column: span 12;
  padding: 1rem;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel), black 5%);
  border-radius: .9rem;
}
.card h3 { margin: 0 0 .25rem; font-size: 1.1rem; }
.card p { margin: 0 0 .75rem; color: var(--muted); }

@media (min-width: 700px) { .card { grid-column: span 6; } }
@media (min-width: 1000px) { .card { grid-column: span 4; } }

/* Footer */
.site-footer { padding: 2rem 1.25rem; color: var(--muted); }

/* Link page */
.links-hero { text-align: center; padding: 3rem 1.25rem 1rem; }
.links-list { max-width: 720px; margin: 0 auto; padding: 1rem 1.25rem 3rem; display: grid; gap: .8rem; }
.link-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; border: 1px solid var(--border); border-radius: .8rem; background: var(--panel); }
.link-item span { color: var(--muted); }
.link-item:hover { text-decoration: none; transform: translateY(-1px); }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .btn:hover, .link-item:hover { transform: none; }
}