:root {
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #0f172a;
    --text-muted: #475569;
    --accent: #2563eb;
    --accent-light: #dbeafe;
    --border: #e2e8f0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.6;
}

.detail-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 5%;
}

.cover-image {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.detail-header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.75rem;
}

.detail-tech {
    display: inline-block;
    background: var(--accent-light);
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.detail-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 700px;
}

.detail-description ul,
.detail-description ol {
    padding-left: 1.5rem;
    margin: 0.75rem 0;
}

.detail-description li {
    margin-bottom: 0.35rem;
}

.visit-btn {
    display: inline-block;
    background-color: var(--accent);
    color: var(--bg-white);
    font-weight: 700;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 3rem;
}

.visit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.gallery-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.gallery-item {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
}

.gallery-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s;
    cursor: pointer;
}

.gallery-item:hover img {
    transform: scale(1.03);
}

.not-found {
    text-align: center;
    padding: 5rem 1rem;
    }

/* LIGHTBOX */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.92);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-overlay img {
    max-width: 90vw;
    max-height: 85vh;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
    background: none;
    border: none;
    padding: 0;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    font-size: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.lightbox-nav:hover {
    background: rgba(255,255,255,0.25);
}

.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }

.lightbox-counter {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.8);
    font-size: 0.95rem;
}

@media (max-width: 640px) {
    .lightbox-nav { width: 44px; height: 44px; font-size: 1.5rem; }
    .lightbox-prev { left: 0.5rem; }
    .lightbox-next { right: 0.5rem; }
}

footer {
    text-align: center;
    padding: 2.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    background-color: var(--bg-white);
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}