:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: #e2e8f0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border-color: #475569;
    --accent-color: #60a5fa;
    --accent-hover: #3b82f6;
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.bg-theme-primary { background-color: var(--bg-primary); }
.bg-theme-secondary { background-color: var(--bg-secondary); }
.bg-theme-tertiary { background-color: var(--bg-tertiary); }
.text-theme-primary { color: var(--text-primary); }
.text-theme-secondary { color: var(--text-secondary); }
.text-theme-tertiary { color: var(--text-tertiary); }
.border-theme { border-color: var(--border-color); }