/**
 * 浏览器标签页样式 - Material Design 3 风格
 * 支持深浅色主题自适应
 */

/* ========== 标签栏容器 ========== */
.tabs-bar {
    height: 36px;
    background: var(--md-surface, #FEF7FF);
    border-bottom: 1px solid var(--md-border-light, #E7E0EC);
    display: flex;
    align-items: stretch;
    flex-shrink: 0;
    position: relative;
    z-index: 5;
}

[data-theme="dark"] .tabs-bar {
    background: var(--md-surface, #211F26);
    border-bottom-color: var(--md-border-light, #38363B);
}

.tabs-bar-inner {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* ========== 滚动容器 ========== */
.tabs-scroll-container {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    height: 100%;
}

.tabs-scroll-container::-webkit-scrollbar {
    display: none;
    height: 0;
}

.tabs-list {
    display: flex;
    align-items: stretch;
    height: 100%;
    padding: 0 4px;
    gap: 2px;
}

/* ========== 标签项 ========== */
.tab-item {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 80px;
    max-width: 180px;
    height: 100%;
    padding: 0 10px 0 12px;
    cursor: pointer;
    position: relative;
    color: var(--md-text-secondary, #49454F);
    font-size: 13px;
    font-weight: 500;
    border-radius: 8px 8px 0 0;
    transition: background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    user-select: none;
    white-space: nowrap;
}

[data-theme="dark"] .tab-item {
    color: var(--md-text-secondary, #CAC4D0);
}

.tab-item:hover {
    background: var(--md-surface-2, #F3EDF7);
    color: var(--md-text-primary, #1C1B1F);
}

[data-theme="dark"] .tab-item:hover {
    background: var(--md-surface-2, #2B2930);
    color: var(--md-text-primary, #E6E0E9);
}

/* 激活标签 */
.tab-item.active {
    background: var(--md-surface-container-high, #ECE6F0);
    color: var(--md-primary, #6750A4);
    font-weight: 600;
}

[data-theme="dark"] .tab-item.active {
    background: var(--md-surface-container-high, #2B2930);
    color: var(--md-primary, #D0BCFF);
}

/* 激活标签底部主色下划线 */
.tab-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 8px;
    right: 8px;
    height: 3px;
    background: var(--md-primary, #6750A4);
    border-radius: 3px 3px 0 0;
}

[data-theme="dark"] .tab-item.active::after {
    background: var(--md-primary, #D0BCFF);
}

/* 固定标签样式微调 */
.tab-item.fixed {
    padding-right: 12px;
}

/* 标签图标 */
.tab-icon {
    font-size: 16px !important;
    flex-shrink: 0;
    opacity: 0.8;
}

.tab-item.active .tab-icon {
    opacity: 1;
}

/* 标签标题 */
.tab-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1;
}

/* 关闭按钮 */
.tab-close {
    display: none;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background-color 0.15s ease;
    margin-left: auto;
}

.tab-item:hover .tab-close,
.tab-item.active .tab-close {
    display: flex;
}

.tab-close .material-icons {
    font-size: 14px !important;
    color: inherit;
    opacity: 0.7;
    transition: opacity 0.15s ease;
}

.tab-close:hover {
    background: var(--md-surface-variant, #E7E0EC);
}

[data-theme="dark"] .tab-close:hover {
    background: var(--md-surface-variant, #49454F);
}

.tab-close:hover .material-icons {
    opacity: 1;
}

/* 标签分隔线 */
.tab-item + .tab-item::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--md-border-light, #E7E0EC);
    opacity: 0.5;
}

[data-theme="dark"] .tab-item + .tab-item::before {
    background: var(--md-border-light, #38363B);
}

.tab-item.active + .tab-item::before,
.tab-item:hover + .tab-item::before {
    opacity: 0;
}

/* ========== 右侧操作区 ========== */
.tabs-actions {
    display: flex;
    align-items: center;
    padding: 0 6px;
    border-left: 1px solid var(--md-border-light, #E7E0EC);
    flex-shrink: 0;
    height: 100%;
}

[data-theme="dark"] .tabs-actions {
    border-left-color: var(--md-border-light, #38363B);
}

.tabs-dropdown-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    color: var(--md-text-secondary, #49454F);
    transition: background-color 0.2s ease;
}

[data-theme="dark"] .tabs-dropdown-btn {
    color: var(--md-text-secondary, #CAC4D0);
}

.tabs-dropdown-btn:hover {
    background: var(--md-surface-2, #F3EDF7);
    color: var(--md-text-primary, #1C1B1F);
}

[data-theme="dark"] .tabs-dropdown-btn:hover {
    background: var(--md-surface-2, #2B2930);
    color: var(--md-text-primary, #E6E0E9);
}

.tabs-dropdown-btn .material-icons {
    font-size: 20px !important;
}

/* ========== 下拉菜单 ========== */
.tabs-dropdown-menu {
    position: fixed;
    min-width: 200px;
    max-width: 280px;
    max-height: 320px;
    overflow-y: auto;
    background: var(--md-surface, #FEF7FF);
    border: 1px solid var(--md-outline-variant, #CAC4D0);
    border-radius: 12px;
    box-shadow: var(--md-shadow-lg, 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.1));
    padding: 6px;
    z-index: 1001;
    display: none;
}

[data-theme="dark"] .tabs-dropdown-menu {
    background: var(--md-surface, #211F26);
    border-color: var(--md-outline-variant, #49454F);
}

.tabs-dropdown-menu.show {
    display: block;
    animation: fadeInScale 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: translateY(-4px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.tabs-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--md-text-secondary, #49454F);
    font-size: 13px;
    transition: background-color 0.15s ease;
}

[data-theme="dark"] .tabs-dropdown-item {
    color: var(--md-text-secondary, #CAC4D0);
}

.tabs-dropdown-item:hover {
    background: var(--md-surface-2, #F3EDF7);
    color: var(--md-text-primary, #1C1B1F);
}

[data-theme="dark"] .tabs-dropdown-item:hover {
    background: var(--md-surface-2, #2B2930);
    color: var(--md-text-primary, #E6E0E9);
}

.tabs-dropdown-item.active {
    background: var(--md-primary-container, #EADDFF);
    color: var(--md-on-primary-container, #21005D);
    font-weight: 600;
}

[data-theme="dark"] .tabs-dropdown-item.active {
    background: var(--md-primary-container, #4F378B);
    color: var(--md-on-primary-container, #EADDFF);
}

.tabs-dropdown-item .material-icons {
    font-size: 18px !important;
    flex-shrink: 0;
}

.tabs-dropdown-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ========== 右键菜单 ========== */
.tabs-context-menu {
    position: fixed;
    min-width: 160px;
    background: var(--md-surface, #FEF7FF);
    border: 1px solid var(--md-outline-variant, #CAC4D0);
    border-radius: 12px;
    box-shadow: var(--md-shadow-lg, 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.1));
    padding: 6px;
    z-index: 1002;
    display: none;
}

[data-theme="dark"] .tabs-context-menu {
    background: var(--md-surface, #211F26);
    border-color: var(--md-outline-variant, #49454F);
}

.tabs-context-menu.show {
    display: block;
    animation: fadeInScale 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.tabs-context-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--md-text-primary, #1C1B1F);
    font-size: 13px;
    transition: background-color 0.15s ease;
}

[data-theme="dark"] .tabs-context-item {
    color: var(--md-text-primary, #E6E0E9);
}

.tabs-context-item:hover {
    background: var(--md-surface-2, #F3EDF7);
}

[data-theme="dark"] .tabs-context-item:hover {
    background: var(--md-surface-2, #2B2930);
}

.tabs-context-item .material-icons {
    font-size: 18px !important;
    color: var(--md-text-secondary, #49454F);
    flex-shrink: 0;
}

[data-theme="dark"] .tabs-context-item .material-icons {
    color: var(--md-text-secondary, #CAC4D0);
}

.tabs-context-divider {
    height: 1px;
    background: var(--md-border-light, #E7E0EC);
    margin: 4px 8px;
}

[data-theme="dark"] .tabs-context-divider {
    background: var(--md-border-light, #38363B);
}

/* ========== 页面内容过渡效果 ========== */
.page-content-transition {
    animation: fadeSlideIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 加载状态 ========== */
.tabs-loading-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--md-primary, #6750A4), var(--md-tertiary, #7D5260));
    width: 0;
    transition: width 0.3s ease;
    z-index: 2;
}

.tabs-loading-bar.loading {
    animation: loadingPulse 1.5s ease-in-out infinite;
}

@keyframes loadingPulse {
    0% { width: 0; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ========== 响应式 - 移动端隐藏标签栏 ========== */
@media (max-width: 768px) {
    .tabs-bar {
        display: none;
    }
}

/* ========== 中等屏幕调整 ========== */
@media (min-width: 769px) and (max-width: 1024px) {
    .tab-item {
        min-width: 60px;
        max-width: 140px;
        font-size: 12px;
        padding: 0 8px 0 10px;
    }
}