:root {
    --bg: #0f0f10;
    --bg-secondary: #18181b;
    --text: #f4f4f5;
    --muted: #9ca3af;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family:
        Inter,
        system-ui,
        sans-serif;
}

.hero {
    text-align: center;
    padding: 4rem 1rem 3rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.04em;
}

.hero p {
    margin-top: 0.5rem;
    color: var(--muted);
}

.gallery {
    width: min(1600px, 95%);
    margin: 0 auto 4rem;

    column-count: 4;
    column-gap: 1rem;
}

@media (max-width: 1200px) {
    .gallery {
        column-count: 3;
    }
}

@media (max-width: 800px) {
    .gallery {
        column-count: 2;
    }
}

@media (max-width: 500px) {
    .gallery {
        column-count: 1;
    }
}

.photo {
    width: 100%;
    margin-bottom: 1rem;

    overflow: hidden;

    border-radius: 14px;

    cursor: pointer;

    break-inside: avoid;
    position: relative;
}

.photo img {
    width: 100%;
    display: block;

    transition:
        transform 0.6s ease,
        filter 0.6s ease;
}

.photo:hover img {
    transform: scale(1.05);
    filter: brightness(1.08);
}

.overlay {
    position: absolute;
    inset: 0;

    background:
        linear-gradient(
            to top,
            rgba(0,0,0,0.55),
            transparent 50%
        );

    opacity: 0;
    transition: opacity 0.3s ease;
}

.photo:hover .overlay {
    opacity: 1;
}

.photo-title {
    position: absolute;
    left: 1rem;
    bottom: 1rem;

    color: white;
    font-size: 0.95rem;

    opacity: 0;
    transform: translateY(10px);

    transition:
        opacity 0.3s ease,
        transform 0.3s ease;
}

.photo:hover .photo-title {
    opacity: 1;
    transform: translateY(0);
}

.loading {
    text-align: center;
    color: var(--muted);
    padding: 4rem;
}

.lightbox {
    position: fixed;
    inset: 0;

    background: rgba(0,0,0,0.95);

    display: flex;
    justify-content: center;
    align-items: center;

    z-index: 9999;

    animation: fadeIn 0.25s ease;
}

.hidden {
    display: none;
}

.viewer {
    max-width: 95vw;
    max-height: 95vh;

    text-align: center;
}

.viewer img {
    max-width: 95vw;
    max-height: 85vh;

    border-radius: 10px;

    box-shadow:
        0 20px 60px rgba(0,0,0,0.5);
}

.caption {
    margin-top: 1rem;
    color: #d1d5db;
}

.counter {
    margin-bottom: 1rem;
    color: #9ca3af;
}

.nav-btn,
.close-btn {
    position: fixed;

    border: none;

    background: rgba(255,255,255,0.08);

    color: white;

    cursor: pointer;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.nav-btn:hover,
.close-btn:hover {
    background: rgba(255,255,255,0.18);
}

.nav-btn {
    width: 60px;
    height: 60px;

    border-radius: 50%;

    font-size: 2rem;

    top: 50%;
    transform: translateY(-50%);
}

.prev {
    left: 30px;
}

.next {
    right: 30px;
}

.close-btn {
    top: 25px;
    right: 25px;

    width: 50px;
    height: 50px;

    border-radius: 50%;

    font-size: 2rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}