/* =========================================
   Related Links Panel (right-side, auto-opens per query)
   ========================================= */

.related-panel {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 320px;
    background: var(--bg-primary, #fff);
    border-left: 1px solid var(--border-color);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.12);
    z-index: 8500;
    display: flex;
    flex-direction: column;
    transform: translateX(calc(100% + 20px));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.related-panel.open {
    transform: translateX(0);
}

.related-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.related-panel-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.related-panel-title h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
}

.close-related-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: 6px;
    transition: background 0.2s;
}

.close-related-btn:hover {
    background: var(--hover-bg);
}

.close-related-btn i {
    width: 18px;
    height: 18px;
}

.related-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.related-link-card {
    display: block;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.related-link-card:hover {
    background: var(--hover-bg);
    border-color: #3b82f6;
}

.related-link-title {
    font-size: 13.5px;
    font-weight: 600;
    color: #3b82f6;
    margin-bottom: 4px;
    line-height: 1.3;
}

.related-link-url {
    font-size: 11.5px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    word-break: break-all;
}

.related-link-snippet {
    font-size: 12.5px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.related-panel-empty,
.related-panel-loading {
    padding: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
}