/* ==================== CSS VARIABLES ==================== */
:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #7c3aed;
    --secondary-dark: #6d28d9;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-auth: linear-gradient(135deg, #1e3a8a 0%, #5b21b6 50%, #7c3aed 100%);
    --gradient-admin: linear-gradient(135deg, #991b1b 0%, #dc2626 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #10b981 100%);
    --gradient-warning: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    --gradient-danger: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);

    /* Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    /* Traffic Light Status */
    --status-not-started: #ef4444;
    --status-in-progress: #f59e0b;
    --status-completed: #10b981;

    /* Backgrounds */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-light: rgba(255, 255, 255, 0.1);

    /* Light Theme Backgrounds */
    --bg-light-primary: #f8fafc;
    --bg-light-secondary: #f1f5f9;
    --bg-light-card: rgba(255, 255, 255, 0.9);

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-dark: #1e293b;
    --text-dark-secondary: #475569;

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-light: rgba(255, 255, 255, 0.2);
    --border-light: #e2e8f0;

    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-blur: blur(16px);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);
    --shadow-glow-success: 0 0 20px rgba(16, 185, 129, 0.3);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 0.15rem;
    --space-sm: 0.35rem;
    --space-md: 0.6rem;
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 2rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.7rem;
    --font-size-sm: 0.8rem;
    --font-size-base: 0.875rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.1rem;
    --font-size-2xl: 1.25rem;
    --font-size-3xl: 1.5rem;
    --font-size-4xl: 1.8rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-index */
    --z-sticky: 100;
    --z-dropdown: 200;
    --z-modal-backdrop: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-splash: 1000;

    /* Layout */
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: 50px;
    --bottomnav-height: 54px;
}

/* Light Theme Variables */
body.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-light: rgba(255, 255, 255, 0.9);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-light: rgba(0, 0, 0, 0.05);

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}