/* ========================================
   Marked OS Design System — Variables
   ======================================== */

:root {
    /* ---- Primary Palette (Brightened Burgundy #800020) ---- */
    --primary: #A31535;
    --primary-light: #C94060;
    --primary-dark: #6B0020;
    --primary-50: rgba(163, 21, 53, 0.05);
    --primary-100: rgba(163, 21, 53, 0.10);
    --primary-200: rgba(163, 21, 53, 0.20);
    --primary-gradient: linear-gradient(135deg, #C22040 0%, #800020 100%);
    --primary-gradient-hover: linear-gradient(135deg, #D43050 0%, #A31535 100%);

    /* ---- Neutral Palette ---- */
    --bg-primary: #FAFBFC;
    --bg-secondary: #F1F3F5;
    --bg-tertiary: #E9ECEF;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F8F9FA;
    --bg-elevated: #FFFFFF;

    --text-primary: #1A1D23;
    --text-secondary: #5F6B7A;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;

    --border-light: #E5E7EB;
    --border-default: #D1D5DB;
    --border-strong: #9CA3AF;

    /* ---- Semantic Colors ---- */
    --success: #059669;
    --success-light: #D1FAE5;
    --success-bg: rgba(5, 150, 105, 0.08);
    --warning: #D97706;
    --warning-light: #FEF3C7;
    --warning-bg: rgba(217, 119, 6, 0.08);
    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --danger-bg: rgba(220, 38, 38, 0.08);
    --info: #2563EB;
    --info-light: #DBEAFE;
    --info-bg: rgba(37, 99, 235, 0.08);

    /* ---- Kanban Status Colors ---- */
    --color-todo: #6B7280;
    --color-progress: #2563EB;
    --color-review: #7C3AED;
    --color-done: #059669;

    /* ---- Priority Colors ---- */
    --priority-low: #6B7280;
    --priority-medium: #2563EB;
    --priority-high: #D97706;
    --priority-urgent: #DC2626;

    /* ---- Typography ---- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --text-xs: 0.6875rem;
    /* 11px */
    --text-sm: 0.8125rem;
    /* 13px */
    --text-base: 0.9375rem;
    /* 15px */
    --text-lg: 1.0625rem;
    /* 17px */
    --text-xl: 1.25rem;
    /* 20px */
    --text-2xl: 1.5rem;
    /* 24px */
    --text-3xl: 1.875rem;
    /* 30px */

    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    --leading-tight: 1.2;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;

    /* ---- Spacing ---- */
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.25rem;
    /* 20px */
    --space-6: 1.5rem;
    /* 24px */
    --space-8: 2rem;
    /* 32px */
    --space-10: 2.5rem;
    /* 40px */
    --space-12: 3rem;
    /* 48px */
    --space-16: 4rem;
    /* 64px */

    /* ---- Border Radius ---- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* ---- Shadows ---- */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.10), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    --shadow-primary: 0 4px 14px rgba(163, 21, 53, 0.25);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-card-hover: 0 8px 25px rgba(0, 0, 0, 0.08);

    /* ---- Transitions ---- */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ---- Z-Index ---- */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-splash: 1000;

    /* ---- Layout ---- */
    --top-bar-height: 56px;
    --bottom-nav-height: 64px;
    --drawer-width: 280px;
    --max-content-width: 1200px;
}

/* ---- Dark Mode ---- */
[data-theme="dark"] {
    --bg-primary: #0F1117;
    --bg-secondary: #1A1D27;
    --bg-tertiary: #252833;
    --bg-card: #1E2130;
    --bg-card-hover: #252839;
    --bg-elevated: #262938;

    --text-primary: #F0F2F5;
    --text-secondary: #9CA3B0;
    --text-tertiary: #6B7280;

    --border-light: #2D3140;
    --border-default: #3B3F50;
    --border-strong: #525668;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.35);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-card-hover: 0 8px 25px rgba(0, 0, 0, 0.3);
    --shadow-primary: 0 4px 14px rgba(163, 21, 53, 0.35);
}