:root { 
  --bg: #0b0f14; 
  --text: #e6edf3; 
  --muted: #90a4ae; 
  --accent: #4cc9f0; 
  --card: #11161d; 
  --border: #1f2937;
  --step-1: clamp(0.9rem, 0.85rem + 0.5vw, 1rem);
  --step-2: clamp(1rem, 0.95rem + 0.7vw, 1.25rem);
  --step-3: clamp(1.3rem, 1.1rem + 1.2vw, 1.8rem);
  --space-1: clamp(0.5rem, 0.4rem + 1vw, 1rem);
  --space-2: clamp(0.75rem, 0.6rem + 1.2vw, 1.25rem);
  --space-3: clamp(1rem, 0.8rem + 1.5vw, 2rem);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { 
  margin: 0; 
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; 
  background: var(--bg); 
  color: var(--text);
  font-size: var(--step-1);
}

a { color: inherit; }

.site-header { 
  border-bottom: 1px solid var(--border); 
  background: rgba(17, 22, 29, 0.8); 
  backdrop-filter: saturate(120%) blur(6px);
  position: sticky; top: 0; z-index: 10; 
}

.nav {
  display: flex; align-items: center;
  gap: var(--space-1);
  max-width: 1000px; margin: 0 auto; 
  padding: var(--space-1) var(--space-2);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 0.4rem 0.7rem;
  border-radius: .375rem;
  font-size: var(--step-1);
}

.links {
  display: flex; gap: var(--space-1); margin-left: auto;
}
.links a { 
  text-decoration: none; 
  padding: .5rem .75rem; 
  border-radius: .375rem; 
  border: 1px solid transparent;
}
.links a[aria-current="page"] { 
  background: var(--card); 
  border-color: var(--border); 
}

.container { 
  max-width: 1000px; margin: 0 auto; padding: var(--space-3) var(--space-2); 
}
.hero { display: grid; gap: .5rem; }
.hero h1 { font-size: var(--step-3); margin: 0; }
.hero p { color: var(--muted); margin: 0; font-size: var(--step-2); }

.cards { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); 
  gap: var(--space-2); margin-top: var(--space-3); 
}
.card { 
  background: var(--card); border: 1px solid var(--border); 
  padding: var(--space-2); border-radius: .5rem; 
}
.card h2 { font-size: var(--step-2); margin-top: 0; }

.site-footer { border-top: 1px solid var(--border); padding: var(--space-2); text-align: center; color: var(--muted); }

.list { line-height: 1.9; padding-left: 1rem; }

@media (max-width: 680px) {
  .menu-toggle { display: inline-block; }
  .links { display: none; flex-direction: column; gap: .25rem; width: 100%; margin: var(--space-1) 0 0 0; }
  .links.open { display: flex; }
  .nav { flex-wrap: wrap; gap: .5rem; }
}

@media (prefers-color-scheme: light) {
  :root { 
    --bg: #f7fafc; --text: #111827; --muted: #374151; --accent: #1d4ed8; --card: #ffffff; --border: #e5e7eb; 
  }
  .site-header { background: rgba(255,255,255,.85); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }