/* CSS Reset und Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Clean Color Palette */
    --primary-color: #ffffff;
    --secondary-color: #f8f9fa;
    --accent-color: #ff6b35;
    --accent-hover: #e55a2b;
    --background-dark: #0f0f0f;
    --background-darker: #000000;
    --background-light: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border-color: #2a2a2a;
    --shadow-light: rgba(255, 255, 255, 0.05);
    --shadow-dark: rgba(0, 0, 0, 0.3);
    
    /* Typography - Clean Open Sans */
    --font-primary: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Clean Spacing */
    --container-max-width: 1140px;
    --section-padding: 80px 0;
    --element-spacing: 1.5rem;
    --border-radius: 8px;
    
    /* Smooth Animation */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition: all 0.2s ease;
}

/* Google Fonts Import - Clean Open Sans */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&display=swap');

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 1s ease;
}

body.loaded {
    opacity: 1;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-medium);
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: rgba(15, 15, 15, 0.98);
    padding: 0.75rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.9rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width var(--transition-fast);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== FILTER SECTION ===== */
.filter-section {
    margin: 100px 0 40px;
    text-align: center;
    display: none !important;
}

.event-filter {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem;
}

.filter-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 400;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    font-family: var(--font-primary);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-color);
    color: var(--primary-color);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

/* ===== GALLERY SECTION ===== */
.gallery-section {
    margin-bottom: 4rem;
    margin-top: 120px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.event-card {
    background: var(--background-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
    position: relative;
}

.event-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow-dark);
    border-color: var(--accent-color);
}

.event-card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.event-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-fast);
}

.event-card:hover .event-card-image img {
    transform: scale(1.05);
}

.event-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-fast);
}

.event-card:hover .event-card-overlay {
    opacity: 1;
}

.overlay-text {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.event-card-content {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.event-card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.event-card-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.photo-count {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.view-btn {
    background: var(--accent-color);
    color: var(--primary-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
}

.view-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

/* ===== LOADING ===== */
.loading {
    display: none;
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== LIGHTBOX ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 65vw;
    max-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: -50px;
    background: var(--accent-color);
    color: var(--primary-color);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    font-weight: bold;
    transition: var(--transition-fast);
    z-index: 2001;
}

.lightbox-close:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-color);
    color: var(--primary-color);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: bold;
    transition: var(--transition-fast);
    z-index: 2001;
}

.lightbox-prev {
    left: -70px;
}

.lightbox-next {
    right: -70px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--accent-hover);
    transform: translateY(-50%) scale(1.1);
}

#lightbox-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--border-radius);
    display: block;
}

.lightbox-info {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-primary);
    background: var(--background-light);
    padding: 1rem 2rem;
    border-radius: 10px;
    min-width: 300px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--background-darker);
    color: var(--text-secondary);
    padding: 2rem 0;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* ===== CONTENT PAGES (Privacy, Impressum) ===== */
.content-page {
    min-height: 80vh;
    padding: 100px 20px 40px;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

.content-section {
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

.content-section h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 500;
    margin: 2rem 0 1rem;
    color: var(--accent-color);
}

.content-section h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-primary);
}

.content-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.content-section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.content-section li {
    margin-bottom: 0.5rem;
}

.contact-info {
    background: var(--background-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    border-left: 3px solid var(--accent-color);
}

.contact-info h3 {
    margin-top: 0;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: var(--transition-fast);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .event-filter {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
    
    .filter-btn {
        width: 200px;
    }
    
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .filter-section {
        margin: 80px 0 20px;
        display: none !important;
    }
    
    .lightbox-content {
        max-width: 100vw;
        max-height: 90vh;
        margin: 0;
        padding: 0 0.5rem;
    }
    
    #lightbox-image {
        max-width: 100%;
        max-height: 100%;
        width: auto;
        height: auto;
    }
    
    .lightbox-prev {
        left: 10px;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        background: rgba(255, 107, 53, 0.9);
    }
    
    .lightbox-next {
        right: 10px;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        background: rgba(255, 107, 53, 0.9);
    }
    
    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        background: rgba(255, 107, 53, 0.9);
    }
    
    .lightbox-info {
        display: none;
    }
}

@media (max-width: 480px) {
    .event-card-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .event-card-info {
        width: 100%;
        justify-content: space-between;
    }
    
    .filter-btn {
        width: 100%;
        max-width: 250px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .event-card-image {
        height: 200px;
    }
    
    .event-card-content {
        padding: 1.5rem;
    }
    
    .nav-brand {
        font-size: 1.3rem;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.event-card {
    animation: fadeInUp 0.6s ease forwards;
}

.event-card:nth-child(2) {
    animation-delay: 0.1s;
}

.event-card:nth-child(3) {
    animation-delay: 0.2s;
}

.event-card:nth-child(4) {
    animation-delay: 0.3s;
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* ===== SELECTION ===== */
::selection {
    background: var(--accent-color);
    color: var(--primary-color);
}

/* ===== FOCUS STYLES ===== */
.filter-btn:focus,
.view-btn:focus,
.nav-link:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* ===== LOADING BODY CLASS ===== */
body:not(.loaded) {
    overflow: hidden;
}

/* Performance Optimization */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Touch Improvements */
@media (hover: none) and (pointer: coarse) {
    .event-card:hover,
    .filter-btn:hover,
    .view-btn:hover {
        transform: none;
    }
    
    .event-card:active {
        transform: scale(0.98);
    }
    
    .filter-btn:active,
    .view-btn:active {
        transform: scale(0.98);
    }
}