/**
 * CSS Custom Properties (Variablen)
 * Zentralisierte Definition aller Design-Tokens
 */

:root {
  /* ========================================
       Farbpalette
       ======================================== */

  /* Primärfarben*/
  --color-primary: #000000;
  --color-secondary: #ffffff;
  --color-accent: #cccccc;

  /* Hintergrundfarben */
  --color-background: #ffffff;
  --color-surface: #f5f5f5;

  /* Textfarben */
  --color-text-primary: #000000;
  --color-text-secondary: #666666;
  --color-text-inverse: #ffffff;

  /* Statusfarben */
  --color-success: #00ff00;
  --color-warning: #ffaa00;
  --color-error: #ff0000;
  --color-info: #0099ff;

  /* Headings */
  --color-heading: #fff;
  --color-heading-bordered: transparent;

  /* ========================================
       Spacing & Layout
       ======================================== */

  /* Basis-Spacing-Einheit */
  --spacing-unit: 8px;

  /* Spacing-Scale */
  --spacing-xs: calc(var(--spacing-unit) * 0.5); /* 4px */
  --spacing-sm: var(--spacing-unit); /* 8px */
  --spacing-md: calc(var(--spacing-unit) * 2); /* 16px */
  --spacing-lg: calc(var(--spacing-unit) * 3); /* 24px */
  --spacing-xl: calc(var(--spacing-unit) * 4); /* 32px */
  --spacing-2xl: calc(var(--spacing-unit) * 6); /* 48px */
  --spacing-3xl: calc(var(--spacing-unit) * 8); /* 64px */

  /* Panel-Dimensionen */
  --panel-width: 1080px;
  --panel-height: 1920px;
  --panel-padding: var(--spacing-xl);

  /* ========================================
       Typographie
       ======================================== */

  /* Font-Families */
  --font-family-primary: "Open Sans", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-family-secondary: Georgia, "Times New Roman", serif;
  --font-family-mono: "Courier New", Courier, monospace;

  /* Font-Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-md: 18px;
  --font-size-lg: 24px;
  --font-size-xl: 32px;
  --font-size-2xl: 48px;
  --font-size-3xl: 70px;
  --font-size-4xl: 96px;

  /* Font-Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line-Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;

  /* Letter-Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;

  /* Gap */
  --gap-sm: 8px;
  --gap-md: 16px;
  --gap-lg: 24px;
  --gap-xl: 32px;
  --gap-2xl: 48px;
  --gap-3xl: 64px;
  --gap-4xl: 96px;

  /* ========================================
       Border & Radius
       ======================================== */

  --border-width-thin: 1px;
  --border-width-medium: 2px;
  --border-width-thick: 4px;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --border-radius-full: 9999px;

  /* ========================================
       Shadows & Elevation
       ======================================== */

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* ========================================
       Animationen & Transitions
       ======================================== */

  /* Durations */
  --duration-instant: 0ms;
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 1000ms;

  /* Easing-Functions */
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);

  /* Standard-Transitions */
  --transition-fast: var(--duration-fast) var(--ease-out);
  --transition-normal: var(--duration-normal) var(--ease-out);
  --transition-slow: var(--duration-slow) var(--ease-out);

  /* ========================================
       Z-Index Scale
       ======================================== */

  --z-index-base: 0;
  --z-index-dropdown: 100;
  --z-index-sticky: 200;
  --z-index-fixed: 300;
  --z-index-overlay: 400;
  --z-index-modal: 500;
  --z-index-popover: 600;
  --z-index-tooltip: 700;
}