/**
 * 侧边栏样式
 */

/* ========== 侧边栏容器 ========== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

/* ========== 侧边栏头部 ========== */
.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.sidebar-logo .logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.sidebar-logo h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 新建对话按钮 */
.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.new-chat-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.new-chat-btn svg {
    width: 18px;
    height: 18px;
}

/* ========== 对话列表 ========== */
.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.chat-history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

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

.chat-history-item.active {
    background: var(--bg-active);
}

.chat-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-title {
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

/* 生成中指示器 */
.generating-indicator {
    font-size: 12px;
    color: var(--accent-color);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.chat-history-item.generating {
    border-left: 2px solid var(--accent-color);
}

.chat-delete-btn {
    opacity: 0;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.chat-history-item:hover .chat-delete-btn {
    opacity: 1;
}

.chat-delete-btn:hover {
    background: var(--error-color);
    color: white;
}

/* ========== 侧边栏底部 ========== */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.clear-history-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.clear-history-btn:hover {
    background: var(--bg-hover);
    color: var(--error-color);
}

.clear-history-btn svg {
    width: 16px;
    height: 16px;
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        z-index: 1000;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    /* 遮罩层 */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    .chat-delete-btn {
        opacity: 1;
        min-width: 36px;
        min-height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* 桌面端隐藏遮罩层 */
@media (min-width: 769px) {
    .sidebar-overlay {
        display: none;
    }
}