:root {
    --bg: #f4f7f9;
    --card: #fff;
    --accent: #478CBF;
    --text: #333;
}

body {
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 1rem;
}

header {
    background: var(--accent);
    color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

.back {
    text-decoration: none;
    color: #0000ee;
    display: inline-block;
    margin-bottom: 1rem;
}

.back:hover {
    text-decoration: underline;
}

.year-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 8px;
}

.year-nav a {
    padding: 6px 15px;
    background: var(--card);
    color: var(--text);
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    transition: all 0.2s;
}

.year-nav a:hover {
    background: var(--accent);
    color: #fff;
}

.year-nav a.active {
    background: var(--accent);
    color: #fff !important;
    font-weight: bold;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.thumb {
    background: var(--card);
    border-radius: 8px;
    overflow: hidden;
    display: block;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
    cursor: pointer;
}

.thumb img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    display: block;
    transition: transform .15s ease;
}

.thumb:hover img {
    transform: translateY(-4px);
    filter: brightness(0.98);
}

.caption {
    padding: 6px 8px;
    font-size: 0.9rem;
    color: #444;
}

@media (max-width:600px) {
    .thumb img {
        height: 90px;
    }
}

footer {
    text-align: center;
    padding: 2rem;
    background: #eee;
    margin-top: 3rem;
    font-size: 0.9rem;
}

footer a {
    color: #666;
    text-decoration: none;
    margin: 0 10px;
}

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

/* Lightbox Styles */
#lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    user-select: none;
}

#lightbox-img {
    max-width: 100%;
    max-height: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

.lb-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 2rem;
    padding: 1rem;
    cursor: pointer;
    border: none;
    transition: background 0.2s;
    z-index: 20;
}

.lb-nav:hover {
    background: rgba(255, 255, 255, 0.2);
}

#lb-prev {
    left: 0;
    border-radius: 0 8px 8px 0;
}

#lb-next {
    right: 0;
    border-radius: 8px 0 0 8px;
}

#lb-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #fff;
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 15px;
    border-radius: 20px;
    cursor: pointer;
    z-index: 20;
}

#lb-fullscreen {
    position: absolute;
    top: 20px;
    right: 75px;
    color: #fff;
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 15px;
    border-radius: 20px;
    cursor: pointer;
    z-index: 20;
}

#lb-play {
    position: absolute;
    top: 20px;
    right: 135px;
    color: #fff;
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 15px;
    border-radius: 20px;
    cursor: pointer;
    z-index: 20;
}

#lb-counter {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 20px;
    border-radius: 20px;
    z-index: 20;
}

/* Optimierung für Querformat / kleine Höhen */
@media (max-height: 500px) {
    #lb-counter {
        top: auto;
        bottom: 20px;
        font-size: 1rem;
    }

    #lb-close {
        top: 10px;
        right: 15px;
        font-size: 1rem;
        padding: 3px 12px;
    }

    #lb-fullscreen {
        top: 10px;
        right: 60px;
        font-size: 1rem;
        padding: 3px 12px;
    }

    #lb-play {
        top: 10px;
        right: 105px;
        font-size: 1rem;
        padding: 3px 12px;
    }

    .lb-nav {
        padding: 0.6rem;
        font-size: 1.5rem;
    }

    #lightbox-img {
        max-height: 75%;
    }
}