/* sidebar — область домена (выделено из main.css при рефакторинге R5). */

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s;
}

.sidebar-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.btn-new {
    background: var(--accent);
    border: none;
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: opacity 0.2s;
}

.btn-new:hover {
    opacity: 0.9;
}

.sessions-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.sidebar-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
    font-family: monospace;
}

.session-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 6px;
    transition: background 0.2s;
    position: relative;
}

.session-item:hover {
    background: var(--hover-bg);
}

.session-item.active {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent);
}

.session-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 4px;
}

.session-title {
    font-weight: 600;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 180px;
}

.session-count {
    color: var(--text-secondary);
    font-size: 12px;
}

.session-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.session-delete {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s, color 0.2s;
}

.session-item:hover .session-delete {
    opacity: 1;
}

.session-delete:hover {
    background: var(--accent);
    color: white;
}