/* ============================================================
   旺企帮 Brand Design Tokens — Deep Blue Tech Style
   Inspired by Tencent Cloud, inspired by enterprise SaaS.
   ============================================================ */

:root {
  /* ── Color System ── */

  /* Primary brand: deep blue */
  --color-primary-50: #EFF6FF;
  --color-primary-100: #DBEAFE;
  --color-primary-200: #BFDBFE;
  --color-primary-300: #93C5FD;
  --color-primary-400: #60A5FA;
  --color-primary-500: #3B82F6;
  --color-primary-600: #2563EB;
  --color-primary-700: #1D4ED8;
  --color-primary-800: #1E40AF;
  --color-primary-900: #1E3A8A;
  --color-primary-950: #172554;

  /* Neutral: cool gray */
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;
  --color-gray-950: #020617;

  /* Semantic tokens */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F8FAFC;
  --color-bg-tertiary: #F1F5F9;
  --color-bg-dark: #0F172A;
  --color-bg-dark-secondary: #1E293B;

  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;
  --color-text-inverse: #FFFFFF;
  --color-text-brand: #2563EB;
  --color-text-brand-hover: #1D4ED8;
  --color-text-link: #2563EB;

  --color-border-default: #E2E8F0;
  --color-border-strong: #CBD5E1;
  --color-border-brand: #2563EB;

  --color-surface-white: #FFFFFF;
  --color-surface-subtle: #F8FAFC;
  --color-surface-elevated: #FFFFFF;
  --color-surface-overlay: rgba(15, 23, 42, 0.5);

  /* State colors */
  --state-success: #10B981;
  --state-warning: #F59E0B;
  --state-error: #EF4444;
  --state-info: #3B82F6;

  /* ── Typography System ── */

  /* Font families */
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;

  /* Font sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */

  /* Line heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Letter spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* Font weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* ── 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 */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* ── Shape / Radius ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* ── Shadow / Depth ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.05);

  /* ── Brand Gradient ── */
  --gradient-brand: linear-gradient(135deg, #2563EB, #60A5FA);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E3A8A 50%, #1E40AF 100%);
  --gradient-surface: linear-gradient(180deg, #F8FAFC, #FFFFFF);

  /* ── Layout ── */
  --container-max: 1200px;
  --header-height: 72px;
}

/* Dark mode tokens */
.dark {
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  --color-bg-dark: #020617;
  --color-bg-dark-secondary: #0F172A;

  --color-text-primary: #F1F5F9;
  --color-text-secondary: #CBD5E1;
  --color-text-tertiary: #64748B;
  --color-text-inverse: #0F172A;
  --color-text-brand: #60A5FA;
  --color-text-brand-hover: #93C5FD;
  --color-text-link: #60A5FA;

  --color-border-default: #334155;
  --color-border-strong: #475569;
  --color-border-brand: #3B82F6;

  --color-surface-white: #1E293B;
  --color-surface-subtle: #0F172A;
  --color-surface-elevated: #334155;
  --color-surface-overlay: rgba(0, 0, 0, 0.7);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.4);
}