:root {
  --c-deep: #0a2540;
  --c-deep-2: #0e2e4d;
  --c-deep-3: #143a5e;
  --c-blue: #1e88e5;
  --c-blue-2: #4ba3e8;
  --c-cyan: #80deea;
  --c-cyan-2: #b2ebf2;
  --c-coral: #ff6b9d;
  --c-coral-2: #ff8eb1;
  --c-glass: rgba(255, 255, 255, 0.12);
  --c-glass-hi: rgba(255, 255, 255, 0.35);
  --c-glass-edge: rgba(255, 255, 255, 0.18);
  --c-text: #e8f1fa;
  --c-text-dim: #9fb5cc;
  --c-text-mute: #6a8198;
  --c-border: rgba(128, 222, 234, 0.18);

  --f-serif: 'Noto Serif SC', 'Cormorant Garamond', 'Source Han Serif SC', Georgia, serif;
  --f-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  --f-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 32px;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;

  --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-2: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(128, 222, 234, 0.15);

  --tx-fast: 150ms ease;
  --tx-med: 300ms ease;
  --tx-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  background: var(--c-deep);
  color: var(--c-text);
  font-family: var(--f-sans);
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(30, 136, 229, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(128, 222, 234, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

h1, h2, h3 { font-family: var(--f-serif); letter-spacing: 0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }

a { transition: color var(--tx-fast); }
a:hover { color: var(--c-cyan); }

::selection { background: var(--c-coral); color: var(--c-deep); }