:root {
    /* ========== Brand (Slate) ========== */
    --color-brand-50: #f8fafc;
    --color-brand-100: #f1f5f9;
    --color-brand-200: #e2e8f0;
    --color-brand-300: #cbd5e1;
    --color-brand-400: #94a3b8;
    --color-brand-500: #475569;
    --color-brand-600: #334155;
    --color-brand-700: #1e293b;
    --color-brand-800: #0f172a;
    --color-brand-900: #020617;

    /* ========== Accent (Orange) ========== */
    --color-accent-50: #fff7ed;
    --color-accent-100: #ffedd5;
    --color-accent-200: #fed7aa;
    --color-accent-300: #fdba74;
    --color-accent-400: #fb923c;
    --color-accent-500: #f97316;
    --color-accent-600: #ea580c;
    --color-accent-700: #c2410c;
    --color-accent-800: #9a3412;
    --color-accent-900: #7c2d12;

    /* ========== Neutral (Gray) ========== */
    --color-gray-50: #fafafa;
    --color-gray-100: #f4f4f5;
    --color-gray-200: #e4e4e7;
    --color-gray-300: #d4d4d8;
    --color-gray-400: #a1a1aa;
    --color-gray-500: #71717a;
    --color-gray-600: #52525b;
    --color-gray-700: #3f3f46;
    --color-gray-800: #27272a;
    --color-gray-900: #18181b;

    /* ========== Semantic ========== */
    --color-success: #059669;
    --color-success-bg: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-danger: #dc2626;
    --color-danger-bg: #fee2e2;
    --color-info: #0284c7;
    --color-info-bg: #e0f2fe;

    /* ========== Risk Grade ========== */
    --color-risk-high: #dc2626;
    --color-risk-high-bg: #fee2e2;
    --color-risk-mid: #f59e0b;
    --color-risk-mid-bg: #fef3c7;
    --color-risk-low: #059669;
    --color-risk-low-bg: #d1fae5;

    /* ========== Surface / Text / Border ========== */
    --bg-base: #ffffff;
    --bg-subtle: var(--color-gray-50);
    --bg-muted: var(--color-gray-100);
    --text-primary: var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --text-tertiary: var(--color-gray-500);
    --text-on-brand: #ffffff;
    --border-default: var(--color-gray-200);
    --border-strong: var(--color-gray-300);

    /* ========== Typography ========== */
    --font-sans: 'Pretendard', 'Pretendard Variable', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'D2Coding', Consolas, monospace;

    --fs-xs: 11px;
    --fs-sm: 12px;
    --fs-base: 13px;
    --fs-md: 14px;
    --fs-lg: 16px;
    --fs-xl: 18px;
    --fs-2xl: 22px;
    --fs-3xl: 28px;
    --fs-4xl: 36px;

    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;

    --lh-tight: 1.3;
    --lh-normal: 1.5;
    --lh-relaxed: 1.7;

    --ls-tight: -0.02em;
    --ls-normal: -0.01em;

    /* ========== Spacing (8px grid) ========== */
    --space-0: 0;
    --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;
    --space-16: 64px;

    /* ========== Radius ========== */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 9999px;

    /* ========== Border Width ========== */
    --border-width-1: 1px;
    --border-width-2: 2px;

    /* ========== Shadow ========== */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);

    /* ========== Layout ========== */
    --sidebar-width: 240px;
    --header-height: 56px;
    --container-max: 1400px;

    /* ========== Z-Index ========== */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 1000;
    --z-toast: 2000;

    /* ========== Transition ========== */
    --transition-fast: 120ms ease;
    --transition-normal: 200ms ease;
}