/* Minimal styles for a clean POC landing */
:root {
  /* dark mode defaults */
  --bg: #0b0c10;
  --ink: #c5c8d4;
  --muted: #8b90a0;
  --accent: #5aa9e6;
  --surface: #11131a;
  --border: #222636;
}

/* Bright (light) theme overrides */
:root[data-theme="light"] {
  --bg: #ffffff;
  --ink: #0f172a; /* slate-900 */
  --muted: #475569; /* slate-600 */
  --accent: #0ea5e9; /* sky-500 */
  --surface: #f8fafc; /* slate-50 */
  --border: #e2e8f0; /* slate-200 */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif; }
body { transition: background-color 180ms ease, color 180ms ease; }
.container { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.nav a { color: var(--ink); text-decoration: none; margin-right: 16px; }
.nav .brand { font-weight: 700; letter-spacing: 0.3px; }
.nav .nav-links a { opacity: 0.9; }
.nav .muted { color: var(--muted); }
.theme-toggle { cursor: pointer; margin-left: 8px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--ink); font-weight: 600; min-width: 40px; line-height: 1; font-size: 16px; }
.theme-toggle:hover { filter: brightness(1.1); }
.hero { padding: 56px 0 24px; }
.hero h1 { margin: 0 0 12px; font-size: 32px; }
.hero p { margin: 0; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
h2 { margin-top: 32px; }
.cta { margin-top: 20px; display: inline-block; background: var(--accent); color: #04121d; padding: 10px 14px; border-radius: 8px; font-weight: 600; text-decoration: none; }
.site-footer { padding: 32px 0; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); margin-top: 48px; }