/**
 * OrbitList Design System
 * Version: 1.2.0-beta
 * 
 * Zentrale CSS Custom Properties für konsistentes Design
 * Basierend auf docs/DESIGN_SYSTEM.md
 */

:root {
    /* ==================== FARBEN ==================== */
    
    /* Light Mode Colors */
    --color-primary: #f1e0cc;
    --color-primary-dark: #d4c4a8;
    --color-secondary: #8b6f47;
    --color-accent: #c9a87c;
    
    --bg-primary: #faf8f5;
    --bg-secondary: #f5f2ed;
    --bg-tertiary: #eee9e0;
    
    --text-primary: #2d2419;
    --text-secondary: #6b5d4f;
    --text-tertiary: #8b7e70;
    --text-muted: #b0a396;
    --text-inverse: #ffffff;
    
    --border-color: #d9d3c8;
    --border-subtle: #e8e4dc;
    
    --success: #7cb342;
    --success-light: #9ccc65;
    --success-bg: #f1f8e9;
    
    --warning: #ffa726;
    --warning-light: #ffb74d;
    --warning-bg: #fff8e1;
    
    --error: #e53935;
    --error-light: #ef5350;
    --error-bg: #ffebee;
    
    --info: #42a5f5;
    --info-light: #64b5f6;
    --info-bg: #e3f2fd;
    
    /* ==================== SPACING ==================== */
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    --spacing-4xl: 48px;
    --spacing-5xl: 64px;
    
    /* ==================== TYPOGRAPHY ==================== */
    
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'Courier New', Courier, 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: 28px;
    --font-size-4xl: 32px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-base: 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-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.15);
    
    /* ==================== TRANSITIONS ==================== */
    
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    
    /* ==================== Z-INDEX SCALE ==================== */
    
    --z-dropdown: 1000;
    --z-sticky: 1010;
    --z-fixed: 1020;
    --z-modal-backdrop: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
    --z-notification: 1070;
}

/* ==================== DARK MODE ==================== */

[data-theme="dark"] {
    /* Dark Mode Colors */
    --color-primary: #142030;
    --color-primary-dark: #0d1821;
    --color-secondary: #4a90e2;
    --color-accent: #6ba3d8;
    
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1f2937;
    
    --text-primary: #e0e0e0;
    --text-secondary: #a8a8a8;
    --text-tertiary: #8a8a8a;
    --text-muted: #6b6b6b;
    --text-inverse: #0d1117;
    
    --border-color: #30363d;
    --border-subtle: #21262d;
    
    --success: #7cb342;
    --success-light: #9ccc65;
    --success-bg: #1e3a1e;
    
    --warning: #ffa726;
    --warning-light: #ffb74d;
    --warning-bg: #3a2e1e;
    
    --error: #e53935;
    --error-light: #ef5350;
    --error-bg: #3a1e1e;
    
    --info: #42a5f5;
    --info-light: #64b5f6;
    --info-bg: #1e2a3a;
    
    /* Dark Mode Shadows (subtler) */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.7);
}

/* System Dark Mode Preference (für Seiten ohne data-theme) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-primary: #142030;
        --color-primary-dark: #0d1821;
        --color-secondary: #4a90e2;
        --color-accent: #6ba3d8;
        
        --bg-primary: #0d1117;
        --bg-secondary: #161b22;
        --bg-tertiary: #1f2937;
        
        --text-primary: #e0e0e0;
        --text-secondary: #a8a8a8;
        --text-tertiary: #8a8a8a;
        --text-muted: #6b6b6b;
        --text-inverse: #0d1117;
        
        --border-color: #30363d;
        --border-subtle: #21262d;
        
        --success-bg: #1e3a1e;
        --warning-bg: #3a2e1e;
        --error-bg: #3a1e1e;
        --info-bg: #1e2a3a;
        
        --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.6);
        --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.7);
    }
}

/* ==================== BUTTON SYSTEM ==================== */

.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-family-base);
}

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

/* Primary Button */
.btn-primary {
    background: var(--color-primary);
    color: var(--text-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--border-subtle);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

/* Danger Button */
.btn-danger {
    background: var(--error);
    color: var(--text-inverse);
    border-color: var(--error);
}

.btn-danger:hover:not(:disabled) {
    background: var(--error-light);
    border-color: var(--error-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(229, 57, 53, 0.3);
}

.btn-danger:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(229, 57, 53, 0.2);
}

/* Ghost Button (transparent) */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

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

.btn-ghost:active:not(:disabled) {
    background: var(--bg-secondary);
}

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* Full Width Button */
.btn-block {
    display: block;
    width: 100%;
}

/* ==================== FORM ELEMENTS ==================== */

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(138, 111, 71, 0.1);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-textarea:focus,
[data-theme="dark"] .form-select:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

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

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ==================== UTILITY CLASSES ==================== */

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* Text Utilities */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

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

/* Border Utilities */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow Utilities */
.shadow-xs { box-shadow: var(--shadow-xs); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }