/* Dark mode (default) */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #263348;
  --bg-input: #0f172a;
  --border: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99,102,241,0.2);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-2: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --gradient-4: linear-gradient(135deg, #22c55e 0%, #06b6d4 100%);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-bg: rgba(15,23,42,0.92);
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --hero-bg: linear-gradient(180deg, #0f172a 0%, #1e1b4b 100%);
  --section-bg: #0f172a;
  --section-alt-bg: #0c1222;
  --sidebar-bg: #0f172a;
  --topbar-bg: rgba(30,41,59,0.8);
  --table-header-bg: rgba(99,102,241,0.1);
  --table-row-hover: rgba(99,102,241,0.05);
  --btn-outline-bg: transparent;
  --btn-outline-color: var(--text-primary);
}

/* Light mode */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #f1f5f9;
  --border: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99,102,241,0.12);
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-2: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --gradient-4: linear-gradient(135deg, #22c55e 0%, #06b6d4 100%);
  --nav-bg: rgba(255,255,255,0.92);
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --hero-bg: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  --section-bg: #f8fafc;
  --section-alt-bg: #f1f5f9;
  --sidebar-bg: #ffffff;
  --topbar-bg: rgba(255,255,255,0.9);
  --table-header-bg: rgba(99,102,241,0.06);
  --table-row-hover: rgba(99,102,241,0.04);
  --btn-outline-bg: #ffffff;
  --btn-outline-color: #334155;
}

/* Light mode overrides for specific elements */
[data-theme="light"] .landing-nav .nav-links a { color: #475569; }
[data-theme="light"] .landing-nav .nav-links a:hover { color: #0f172a; }
[data-theme="light"] .hero { background: var(--hero-bg) !important; }
[data-theme="light"] .hero h1 { color: #0f172a; }
[data-theme="light"] .hero h1 span { color: #6366f1; }
[data-theme="light"] .hero p { color: #475569; }
[data-theme="light"] .section { background: var(--section-bg); }
[data-theme="light"] .section-alt { background: var(--section-alt-bg); }
[data-theme="light"] .feature-card { background: #fff; border-color: #e2e8f0; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
[data-theme="light"] .feature-card:hover { border-color: #6366f1; box-shadow: 0 8px 30px rgba(99,102,241,0.1); }
[data-theme="light"] .price-card { background: #fff; border-color: #e2e8f0; }
[data-theme="light"] .price-card:hover { border-color: #6366f1; }
[data-theme="light"] .blog-card { background: #fff; border-color: #e2e8f0; }
[data-theme="light"] .footer { background: #0f172a; color: #f1f5f9; }
[data-theme="light"] .sidebar { background: var(--sidebar-bg); border-color: #e2e8f0; }
[data-theme="light"] .topbar { background: var(--topbar-bg); border-color: #e2e8f0; }
[data-theme="light"] .stat-card { background: #fff; border-color: #e2e8f0; }
[data-theme="light"] .hero-badge { background: rgba(99,102,241,0.08); color: #6366f1; border-color: rgba(99,102,241,0.2); }
[data-theme="light"] .btn-outline { background: #fff; color: #334155; border-color: #e2e8f0; }
[data-theme="light"] .btn-outline:hover { border-color: #6366f1; color: #6366f1; }
[data-theme="light"] table { color: #0f172a; }
[data-theme="light"] table tr { border-color: #e2e8f0 !important; }
[data-theme="light"] .auth-card { background: #fff; border-color: #e2e8f0; box-shadow: 0 8px 40px rgba(0,0,0,0.06); }
[data-theme="light"] .auth-container { background: #f8fafc; }
[data-theme="light"] input, [data-theme="light"] select, [data-theme="light"] textarea { background: #f1f5f9; color: #0f172a; border-color: #e2e8f0; }
[data-theme="light"] .nav-item { color: #475569; }
[data-theme="light"] .nav-item:hover, [data-theme="light"] .nav-item.active { background: rgba(99,102,241,0.08); color: #6366f1; }

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; transition: background 0.3s, color 0.3s; }
a { color: var(--accent); text-decoration: none; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Theme toggle button */
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  color: var(--text-secondary);
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: var(--transition);
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}