:root {
  --bg: #0a0e1a;
  --bg2: #0f1525;
  --bg3: #151d35;
  --surface: #1a2340;
  --border: rgba(255,255,255,0.08);
  --teal: #00d4ff;
  --teal2: #00a8cc;
  --accent: #ff6b35;
  --text: #e8edf5;
  --text2: #8892a4;
  --text3: #5a6478;
  --card: rgba(26, 35, 64, 0.8);
  --glow: rgba(0, 212, 255, 0.15);
}

[data-theme="light"] {
  --bg: #f5f7ff;
  --bg2: #eef1fa;
  --bg3: #e4e9f5;
  --surface: #ffffff;
  --border: rgba(0,0,0,0.08);
  --teal: #0077b6;
  --teal2: #005f8e;
  --accent: #e85d04;
  --text: #0f1525;
  --text2: #4a5568;
  --text3: #8892a4;
  --card: rgba(255,255,255,0.9);
  --glow: rgba(0,119,182,0.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Instrument Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
  overflow-x: hidden;
}

/* ── NOISE TEXTURE ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── NAVBAR ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}

[data-theme="light"] nav {
  background: rgba(245, 247, 255, 0.85);
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 18px;
  color: var(--teal);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}