/**
 * Collections Page Styles
 * Listing page and shared collection styles
 */

/* ===== COLLECTIONS SECTION ===== */
.collections-section {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: -0.5rem;
    margin-bottom: var(--spacing-lg);
}

/* ===== YEAR NAVIGATION ===== */
.year-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.year-display {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 80px;
    text-align: center;
}

.nav-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    background: var(--bg-light);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

/* ===== COLLECTIONS LIST ===== */
.collections-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== COLLECTION CARD ===== */
.collection-card {
    display: block;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md) var(--spacing-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.collection-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--collection-color, var(--accent-color));
}

.collection-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.collection-card:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(114, 171, 191, 0.4);
}

.collection-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: 0.5rem;
}

.collection-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--collection-color, var(--accent-color));
    flex-shrink: 0;
    margin-top: 0.35rem;
}

.collection-name {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.collection-dates {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
}

.collection-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    padding-left: 1.5rem;
}

.collection-arrow {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
}

.collection-card:hover .collection-arrow {
    color: var(--accent-color);
    transform: translateY(-50%) translateX(4px);
}

/* ===== LOADING ===== */
.loading-container {
    display: flex;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading-container[hidden] {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    color: var(--text-tertiary);
    padding: var(--spacing-xl);
    font-size: 1.1rem;
}

.empty-state[hidden] {
    display: none;
}

.collections-list[hidden] {
    display: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .collections-section {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .collection-card {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .collection-name {
        font-size: 1.15rem;
    }

    .collection-description {
        font-size: 0.9rem;
    }

    .collection-arrow {
        display: none;
    }

    .year-display {
        font-size: 1.3rem;
    }

    .nav-btn {
        padding: 0.4rem 0.75rem;
        font-size: 1rem;
    }
}