/**
 * BrainDump Design System
 * CSS Custom Properties für Template-basiertes Theming
 * 
 * @version 2.0.0
 * @date 2025-12-09
 * 
 * CHANGES v2.0:
 * - REMOVED: -moz-osx-font-smoothing (verursachte Browser-Warnungen)
 * 
 * VERWENDUNG:
 * - Alle Farben/Abstände zentral definiert
 * - Einfach anpassbar durch Variablen ändern
 * - Dark/Light Mode per data-theme Attribut
 */

/* ============================================
   1. DESIGN TOKENS (Zentrale Definitionen)
   ============================================ */

:root {
  /* === FARBEN === */
  
  /* Primärfarben */
  --color-primary: #667eea;
  --color-primary-light: #764ba2;
  --color-primary-dark: #4c51bf;
  
  /* Graustufen */
  --color-bg: #0a0a0a;
  --color-bg-elevated: #1a1a1a;
  --color-bg-card: #1e1e1e;
  --color-bg-input: #2a2a2a;
  
  --color-text: #ffffff;
  --color-text-secondary: #a0aec0;
  --color-text-muted: #718096;
  
  /* Funktionsfarben */
  --color-success: #10b981;
  --color-error: #f56565;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  
  /* Borders */
  --color-border: #2d3748;
  --color-border-light: #4a5568;
  
  /* === ABSTÄNDE === */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* === TYPOGRAFIE === */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* === BORDER RADIUS === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* === SHADOWS === */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* === TRANSITIONS === */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* === Z-INDEX === */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* === LIGHT MODE (Optional) === */
[data-theme="light"] {
  --color-bg: #ffffff;
  --color-bg-elevated: #f7fafc;
  --color-bg-card: #ffffff;
  --color-bg-input: #f7fafc;
  
  --color-text: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  
  --color-border: #e2e8f0;
  --color-border-light: #cbd5e0;
}

/* ============================================
   2. BASE STYLES (Reset + Grundlagen)
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  /* REMOVED: -moz-osx-font-smoothing: grayscale; - verursacht Browser-Warnungen */
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

/* ============================================
   3. KOMPONENTEN (Wiederverwendbar)
   ============================================ */

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  
  padding: var(--spacing-sm) var(--spacing-md);
  
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  text-decoration: none;
  
  border: none;
  border-radius: var(--radius-md);
  
  cursor: pointer;
  transition: all var(--transition-base);
  
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button Varianten */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-elevated);
  border-color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-elevated);
}

/* Button Größen */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-lg);
}

/* === CARDS === */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-light);
  box-shadow: var(--shadow-md);
}

/* === INPUTS === */
.input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  
  transition: all var(--transition-base);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.input::placeholder {
  color: var(--color-text-muted);
}

/* ============================================
   4. UTILITY CLASSES
   ============================================ */

/* Spacing */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

/* Text */
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Display */
.hidden { display: none; }
.flex { display: flex; }
.grid { display: grid; }

/* Flex */
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

/* ============================================
   5. RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile First */
@media (min-width: 640px) {
  :root {
    --font-size-base: 17px;
  }
}

@media (min-width: 768px) {
  .card {
    padding: var(--spacing-xl);
  }
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 18px;
  }
}

/* ============================================
   6. ANIMATIONEN
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fadeIn {
  animation: fadeIn var(--transition-base);
}

.animate-slideUp {
  animation: slideUp var(--transition-base);
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* ============================================
   7. DARK/LIGHT MODE TOGGLE
   ============================================ */

.theme-toggle {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  
  width: 48px;
  height: 48px;
  
  display: flex;
  align-items: center;
  justify-content: center;
  
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  
  cursor: pointer;
  transition: all var(--transition-base);
  
  z-index: var(--z-fixed);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   ENDE Design System v2.0
   ============================================ */