:root {
    --bg-app: #f4f5f7;
    --bg-sidebar: #ffffff;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f3f4f6;
    --bg-elevated: #ffffff;
    --bg-header: #ffffff;
    --bg-overlay: rgba(15, 17, 21, 0.45);

    --border-default: #e5e7eb;
    --border-subtle: #eef0f3;
    --border-strong: #d1d5db;

    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --text-inverse: #ffffff;

    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-muted: rgba(79, 70, 229, 0.1);
    --primary-foreground: #ffffff;

    --success: #16a34a;
    --success-muted: rgba(22, 163, 74, 0.12);
    --warning: #d97706;
    --warning-muted: rgba(217, 119, 6, 0.12);
    --danger: #dc2626;
    --danger-muted: rgba(220, 38, 38, 0.12);
    --info: #2563eb;
    --info-muted: rgba(37, 99, 235, 0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 999px;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    --font-page: 1.5rem;
    --font-section: 1.125rem;
    --font-kpi: 1.75rem;
    --font-card: 0.8125rem;
    --font-body: 0.875rem;
    --font-small: 0.75rem;

    --shadow: 0 1px 2px rgba(15, 17, 21, 0.04);
    --shadow-md: 0 8px 24px rgba(15, 17, 21, 0.08);
    --transition: 180ms ease;
    --transition-slow: 220ms ease;

    --sidebar-width: 256px;
    --sidebar-collapsed-width: 76px;
    --header-height: 64px;

    --text-color: var(--text-primary);
    --bg-color: var(--bg-app);
    --card-bg: var(--bg-surface);
    --sidebar-bg: var(--bg-sidebar);
    --header-bg: var(--bg-header);
    --border-color: var(--border-default);
    --hover-bg: var(--bg-surface-hover);
    --card-radius: var(--radius-md);
    --primary-gradient: var(--primary);
    --secondary: var(--primary-hover);
    --light: #f8f9fa;
    --dark: #111827;
    color-scheme: light;
}

.dark-mode {
    --bg-app: #101214;
    --bg-sidebar: #14171c;
    --bg-surface: #1b1e24;
    --bg-surface-hover: #23262e;
    --bg-elevated: #22262e;
    --bg-header: #14171c;
    --bg-overlay: rgba(0, 0, 0, 0.55);

    --border-default: rgba(255, 255, 255, 0.08);
    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-strong: rgba(255, 255, 255, 0.14);

    --text-primary: #e8eaed;
    --text-secondary: #a8adb4;
    --text-muted: #7d838c;
    --text-inverse: #101214;

    --primary: #818cf8;
    --primary-hover: #a5b4fc;
    --primary-muted: rgba(129, 140, 248, 0.16);
    --primary-foreground: #101214;

    --success: #4ade80;
    --success-muted: rgba(74, 222, 128, 0.14);
    --warning: #fbbf24;
    --warning-muted: rgba(251, 191, 36, 0.14);
    --danger: #f87171;
    --danger-muted: rgba(248, 113, 113, 0.14);
    --info: #60a5fa;
    --info-muted: rgba(96, 165, 250, 0.14);

    --shadow: none;
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.28);
    --primary-gradient: var(--primary);
    --secondary: #a5b4fc;
    --dark: #e8eaed;
    color-scheme: dark;
}