:root {
  --text-primary: #eee;
  --text-secondary: #888;
  --accent: #00ff88;
  --accent-dim: #00ff88cc;
  --bg-primary: #000;
  --bg-secondary: #111;
  --bg-tertiary: #1a1a1a;
  --border: #222;
}

[data-theme="matrix"] {
  --text-primary: #1a1a1a;
  --text-secondary: #666;
  --accent: #00aa00;
  --accent-dim: #00aa00cc;
  --bg-primary: #f0f0f0;
  --bg-secondary: #fafafa;
  --bg-tertiary: #eee;
  --border: #ccc;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); }

.card, .sidebar {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-danger { background: #ff4444; color: #fff; }

input, textarea, select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px;
  border-radius: 6px;
  font-size: 1em;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

.nav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-brand { color: var(--accent); font-weight: bold; font-size: 1.1em; text-decoration: none; }
.nav-links { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.nav-links a { color: var(--text-secondary); font-size: 0.9em; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

.theme-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1em;
}
.theme-btn:hover { border-color: var(--accent); color: var(--accent); }

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }