/* File Tabs Component - Monochrome Edge Theme */

.file-tabs-container {
    background: var(--theme-surface);
    border-bottom: 1px solid var(--theme-border);
    display: flex;
    align-items: stretch;
    height: 40px;
    overflow: hidden;
    position: relative;
}

/* Tab List */
.file-tabs-list {
    display: flex;
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: 1px;
}

.file-tabs-list::-webkit-scrollbar {
    display: none;
}

/* Tab Item */
.file-tab {
    min-width: 120px;
    max-width: 200px;
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 0.75rem;
    background: var(--theme-bg);
    border: none;
    color: var(--theme-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    user-select: none;
    gap: 0.5rem;
}

.file-tab:hover {
    background: var(--theme-surface);
    color: var(--theme-text-primary);
}

.file-tab.active {
    background: var(--theme-surface);
    color: var(--theme-text-primary);
    border-bottom: 2px solid var(--theme-accent);
}

/* Tab Icon */
.file-tab-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--theme-text-muted);
}

.file-tab.active .file-tab-icon {
    color: var(--theme-text-secondary);
}

/* File type icons */
.file-tab[data-type="js"] .file-tab-icon { color: var(--theme-warning); }
.file-tab[data-type="ts"] .file-tab-icon { color: var(--theme-info); }
.file-tab[data-type="css"] .file-tab-icon { color: var(--theme-success); }
.file-tab[data-type="html"] .file-tab-icon { color: var(--theme-error); }
.file-tab[data-type="md"] .file-tab-icon { color: var(--theme-text-secondary); }

/* Tab Label */
.file-tab-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.875rem;
    font-weight: 400;
}

.file-tab.modified .file-tab-label::after {
    content: '•';
    margin-left: 0.25rem;
    color: var(--theme-warning);
    font-size: 1.2em;
    line-height: 1;
}

/* Tab Close Button */
.file-tab-close {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--theme-text-muted);
    opacity: 0;
    transition: all 0.2s;
    flex-shrink: 0;
}

.file-tab:hover .file-tab-close,
.file-tab.active .file-tab-close {
    opacity: 1;
}

.file-tab-close:hover {
    background: var(--theme-bg);
    color: var(--theme-text-primary);
}

.file-tab-close::before {
    content: '×';
    font-size: 1.2em;
    line-height: 1;
}

/* Tab Overflow Indicators */
.file-tabs-scroll {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(90deg, var(--theme-surface) 60%, transparent);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 1;
}

.file-tabs-scroll:hover {
    opacity: 1;
}

.file-tabs-scroll.left {
    left: 0;
    background: linear-gradient(90deg, var(--theme-surface) 60%, transparent);
}

.file-tabs-scroll.right {
    right: 0;
    background: linear-gradient(-90deg, var(--theme-surface) 60%, transparent);
}

.file-tabs-scroll.visible {
    opacity: 0.8;
}

.file-tabs-scroll-icon {
    width: 16px;
    height: 16px;
    color: var(--theme-text-secondary);
}

.file-tabs-scroll-icon::before {
    content: '‹';
    font-size: 1.5em;
    line-height: 1;
}

.file-tabs-scroll.right .file-tabs-scroll-icon::before {
    content: '›';
}

/* Tab Actions */
.file-tabs-actions {
    display: flex;
    align-items: center;
    padding: 0 0.5rem;
    gap: 0.25rem;
    border-left: 1px solid var(--theme-border);
}

.file-tab-action {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--theme-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
    border: none;
}

.file-tab-action:hover {
    background: var(--theme-bg);
    color: var(--theme-text-primary);
}

/* New Tab Button */
.file-tab-new::before {
    content: '+';
    font-size: 1.25em;
    line-height: 1;
}

/* Tab Menu Button */
.file-tab-menu::before {
    content: '⋮';
    font-size: 1.25em;
    line-height: 1;
}

/* Dragging State */
.file-tab.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.file-tab.drag-over {
    background: var(--theme-accent-alpha);
}

.file-tab.drag-over::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: var(--theme-accent);
}

/* Tab Context Menu */
.file-tab-context-menu {
    position: fixed;
    background: var(--theme-surface);
    border: 1px solid var(--theme-border);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 0.25rem;
    min-width: 160px;
    z-index: 1000;
    display: none;
}

.file-tab-context-menu.active {
    display: block;
}

.file-tab-context-item {
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--theme-text-primary);
    transition: all 0.2s;
}

.file-tab-context-item:hover {
    background: var(--theme-bg);
}

.file-tab-context-divider {
    height: 1px;
    background: var(--theme-border);
    margin: 0.25rem 0;
}

/* Split View Support */
.file-tabs-split {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.file-tabs-split-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-tabs-split-divider {
    height: 2px;
    background: var(--theme-border);
    cursor: row-resize;
    position: relative;
}

.file-tabs-split-divider:hover {
    background: var(--theme-accent);
}

/* Breadcrumb Style Tabs */
.file-tabs-breadcrumb {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    height: 32px;
    background: var(--theme-bg);
    border-bottom: 1px solid var(--theme-border);
    gap: 0.5rem;
    font-size: 0.875rem;
}

.file-tabs-breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--theme-text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.file-tabs-breadcrumb-item:hover {
    color: var(--theme-text-primary);
}

.file-tabs-breadcrumb-separator {
    color: var(--theme-text-muted);
    opacity: 0.5;
}

.file-tabs-breadcrumb-separator::before {
    content: '/';
}

/* Compact Mode */
.file-tabs-container.compact {
    height: 32px;
}

.file-tabs-container.compact .file-tab {
    padding: 0 0.5rem;
    min-width: 80px;
}

.file-tabs-container.compact .file-tab-label {
    font-size: 0.8125rem;
}

/* Vertical Tabs */
.file-tabs-container.vertical {
    flex-direction: column;
    width: 200px;
    height: auto;
    border-bottom: none;
    border-right: 1px solid var(--theme-border);
}

.file-tabs-container.vertical .file-tabs-list {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
}

.file-tabs-container.vertical .file-tab {
    max-width: 100%;
    border-bottom: none;
    border-left: 2px solid transparent;
}

.file-tabs-container.vertical .file-tab.active {
    border-left-color: var(--theme-accent);
    border-bottom: none;
}

/* Responsive */
@media (max-width: 640px) {
    .file-tab {
        min-width: 80px;
        max-width: 120px;
    }
    
    .file-tab-label {
        font-size: 0.8125rem;
    }
    
    .file-tab-close {
        opacity: 1;
    }
}