:root {
    /* Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

[data-theme="dark"] {
    /* Dark Mode */
    --bg-primary: #1a1a1a;
    --bg-secondary: #0f0f0f;
    --bg-card: #242424;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --accent-color: #60a5fa;
    --accent-hover: #3b82f6;
    --border-color: #333333;
    --shadow: rgba(0, 0, 0, 0.4);
    --shadow-hover: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.top-nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px var(--shadow);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
}

.logo i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1.5rem;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
}

.theme-switch-container {
    display: flex;
    align-items: center;
}

.theme-buttons {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-secondary);
    padding: 0.25rem;
    border-radius: 8px;
}

.theme-button {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-button:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.theme-button.active {
    background: var(--accent-color);
    color: #ffffff;
}

/* Hero Section */
.hero-section {
    background: var(--gradient-1);
    color: #ffffff;
    padding: 4rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Filter Section */
.filter-section {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 73px;
    z-index: 90;
    box-shadow: 0 2px 4px var(--shadow);
}

.filter-tabs {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-tab {
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-tab:hover {
    background: var(--bg-card);
    border-color: var(--accent-color);
}

.filter-tab.active {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
}

.content-page {
    display: none;
}

.content-page.active {
    display: block;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Events Grid */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.event-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow);
    display: flex;
    flex-direction: column;
}

.event-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-hover);
    border-color: var(--accent-color);
}

.event-card.featured {
    border: 2px solid var(--accent-color);
}

.event-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1rem;
}

.event-image.music {
    background: var(--gradient-1);
}

.event-image.market {
    background: var(--gradient-2);
}

.event-image.festival {
    background: var(--gradient-3);
}

.event-image.theater {
    background: var(--gradient-4);
}

.event-image.sport {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.event-image.food {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

.event-image.art {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.event-category-badge {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: blur(10px);
}

.featured-badge {
    background: var(--accent-color);
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.event-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.event-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.event-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.event-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    flex: 1;
    line-height: 1.6;
}

.event-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.event-detail {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.event-detail i {
    color: var(--accent-color);
    width: 16px;
}

.event-button {
    background: var(--accent-color);
    color: #ffffff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.event-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Kalender Page */
.kalender-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
}

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

.kalender-placeholder i {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.kalender-placeholder h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Kategorien Page */
.kategorien-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.kategorie-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow);
}

.kategorie-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-hover);
    border-color: var(--accent-color);
}

.kategorie-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: #ffffff;
}

.kategorie-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.kategorie-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.kategorie-count {
    display: inline-block;
    background: var(--accent-color);
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Info Page */
.info-content {
    max-width: 800px;
    margin: 0 auto;
}

.info-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.info-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.info-section h3 i {
    color: var(--accent-color);
}

.info-section p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.info-section a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

.info-section a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-content {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .filter-section {
        top: 120px;
    }
    
    .filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    
    .events-grid,
    .kategorien-grid {
        grid-template-columns: 1fr;
    }
}