:root {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f8fafc;
    --text-dim: #94a3b8;
    --accent: #3b82f6;
    --border: #334155;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent);
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-color);
}

.footer-nav {
    text-align: center;
    margin-top: 40px;
}

.footer-nav a {
    color: var(--text-dim);
    text-decoration: none;
    margin: 0 10px;
}

.footer-nav a:hover {
    color: var(--text-color);
    text-decoration: underline;
}

header {
    background-color: var(--surface-color);
    padding: 2rem;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

h1 {
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
}

p {
    color: var(--text-dim);
    margin: 0 0 1.5rem 0;
}

.search-container input {
    padding: 1rem 1.5rem;
    width: 100%;
    max-width: 500px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
}

.search-container input:focus {
    border-color: var(--accent);
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

/* Gallery Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--surface-color);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #000;
}

.card-content {
    padding: 1rem;
}

.card-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card-id {
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
    font-weight: 700;
}

/* Detail View */
.btn {
    background: transparent;
    color: var(--accent);
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    margin-bottom: 2rem;
}

.detail-header {
    margin-bottom: 2rem;
}

.detail-header h2 {
    font-size: 2rem;
    margin: 0 0 0.5rem 0;
}

.detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.legend-panel {
    grid-column: 1 / -1;
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.image-panel img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
}

ol {
    margin: 0;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .detail-content {
        grid-template-columns: 1fr;
    }
}