/**
 * Flugwetter Dashboard - Zentrales CSS Framework
 * Unterstützt Dark Mode, Light Mode und Theme-Anpassungen
 */

/* === CSS Variables / Custom Properties === */
:root {
    /* Dark Mode (Default) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #161616;
    --bg-tertiary: #1a1a1a;
    --bg-card: #161616;
    --bg-header: linear-gradient(135deg, #667eea, #764ba2);
    --bg-header-solid: #667eea;
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: #888888;
    --text-accent: #667eea;
    
    --border-color: #333333;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    --color-success: #2ecc71;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    --color-info: #3498db;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
    
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    --header-height: 120px;
    --container-max-width: 1400px;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f0f0;
    --bg-card: #ffffff;
    --bg-header: linear-gradient(135deg, #667eea, #764ba2);
    --bg-header-solid: #667eea;
    
    --text-primary: #1a1a1a;
    --text-secondary: #444444;
    --text-muted: #666666;
    --text-accent: #5a67d8;
    
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* === Layout === */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-md);
}

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

/* === Header === */
.header {
    background: var(--bg-header);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.header-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
    color: white;
}

@media (min-width: 768px) {
    .header-title {
        font-size: var(--font-size-3xl);
    }
}

.header-subtitle {
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--font-size-sm);
}

@media (min-width: 768px) {
    .header-subtitle {
        font-size: var(--font-size-base);
    }
}

/* === Navigation === */
.nav-back {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.nav-back:hover {
    color: white;
}

/* === Clock Widget === */
.clock-widget {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.clock-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    min-width: 100px;
}

.clock-time {
    font-size: var(--font-size-xl);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: white;
}

.clock-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* === Theme Toggle === */
.theme-toggle {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: white;
}

/* === Cards === */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--text-accent);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* === Grid === */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--text-accent);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--border-color);
}

/* === Tables === */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.5px;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: var(--bg-tertiary);
}

/* === Status Badges === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-success { background: rgba(46, 204, 113, 0.2); color: var(--color-success); }
.badge-warning { background: rgba(243, 156, 18, 0.2); color: var(--color-warning); }
.badge-danger { background: rgba(231, 76, 60, 0.2); color: var(--color-danger); }
.badge-info { background: rgba(52, 152, 219, 0.2); color: var(--color-info); }

/* === Footer === */
.footer {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xl);
}

/* === Utilities === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.hidden { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* === Animationen === */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

/* === Print Styles === */
@media print {
    .theme-toggle,
    .nav-back {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .header {
        background: #667eea;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}