:root {
  --bg: #000000;
  --fg: #ffffff;
  --muted: #bbbbbb;
  --line: rgba(255,255,255,0.16);
  --card: #111111;
  --border: rgba(255,255,255,0.12);
  --accent: #e6e6e6;
  --logo-filter: invert(1);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --fg: #0b0b0b;
    --muted: #4a4a4a;
    --line: rgba(0,0,0,0.12);
    --card: #f7f7f7;
    --border: rgba(0,0,0,0.12);
    --accent: #111111;
    --logo-filter: none;
  }
}

/* Base */
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Mulish', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}
.container { width: min(900px, 70%); margin: 0 auto; }

/* Sections */
section { padding: 72px 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: none; }
.section-title { font-size: 14px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
h2 { font-size: clamp(26px, 3.6vw, 40px); line-height: 1.15; margin: 8px 0 20px; }
p.lead { color: var(--muted); font-size: 18px; }

/* Utilities */
.muted { color: var(--muted); }
.center { text-align: center; }