/* ============================================================
   VonBergner Design System – CSS Custom Properties
   Modern, geometric, Apple-inspired.
   ============================================================ */

:root {
  /* ── Primary – Kanzlei-Blau ── */
  --color-primary: #3d5a8a;
  --color-primary-dark: #2e4670;
  --color-primary-light: #6b8ec4;
  --color-primary-bg: #eef1f7;

  /* ── Accent – VonBergner Blue ── */
  --color-accent: #5470AE;
  --color-accent-hover: #4862a0;
  --color-accent-active: #3d5590;
  --color-accent-light: #edf0f7;

  /* ── Neutrals – Clean, high contrast ── */
  --color-black: #1a1a1a;
  --color-dark: #1d1d1f;
  --color-gray-900: #333336;
  --color-gray-700: #424245;
  --color-gray-500: #6e6e73;
  --color-gray-400: #86868b;
  --color-gray-300: #a1a1a6;
  --color-gray-200: #d2d2d7;
  --color-gray-100: #f5f5f7;
  --color-white: #ffffff;
  --color-off-white: #fbfbfd;

  /* ── Functional ── */
  --color-success: #30d158;
  --color-warning: #ff9f0a;
  --color-error: #ff3b30;
  --color-info: #0a84ff;

  /* ── Typography ── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Lora', 'Georgia', 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;

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

  /* Type scale – modular, base 16px */
  --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 */

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* ── 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 */

  /* ── Layout ── */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;
  --content-width: 800px;

  /* ── Borders & Radius ── */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 4px;       /* max radius for geometric design */
  --radius-lg: 6px;
  --radius-full: 9999px;

  --border-width: 1px;
  --border-color: var(--color-gray-200);

  /* ── 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 rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.08), 0 8px 16px rgba(0, 0, 0, 0.04);

  /* ── Transitions ── */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* ── Z-index layers ── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
}

/* ── Dark sections (inverted) ── */
[data-theme="dark"] {
  --color-black: #f5f5f7;
  --color-dark: #e8e8ed;
  --color-gray-700: #a1a1a6;
  --color-gray-500: #86868b;
  --color-gray-100: #1d1d1f;
  --color-white: #000000;
  --color-off-white: #0a0a0a;
  --border-color: #333336;
}