/**
 * Project and Session Tabs Styling
 * Inspired by CodeNomad's two-level tab system
 * https://github.com/NeuralNomadsAI/CodeNomad
 */

/* ============================================================
   Project Tabs (Level 1)
   ============================================================ */

#project-tabs {
    background: #1a1a1a;
    border-bottom: 1px solid #333;
    padding: 0;
}

.project-tabs {
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: #444 #1a1a1a;
}

.project-tabs::-webkit-scrollbar {
    height: 6px;
}

.project-tabs::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.project-tabs::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 3px;
}

.project-tabs::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Project Tab Button */
.project-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 6px 6px 0 0;
    color: #888;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-width: 0;
}

.project-tab:hover {
    background: #252525;
    color: #e0e0e0;
}

.project-tab.active {
    background: #222;
    color: #4a9eff;
    border-bottom-color: #4a9eff;
}

.project-tab .tab-icon {
    font-size: 14px;
    flex-shrink: 0;
}

.project-tab .tab-label {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-tab .tab-count {
    font-size: 11px;
    background: #333;
    color: #888;
    padding: 2px 6px;
    border-radius: 10px;
    flex-shrink: 0;
}

.project-tab.active .tab-count {
    background: rgba(74, 158, 255, 0.2);
    color: #4a9eff;
}

/* New Project Tab */
.project-tab-new {
    color: #51cf66;
}

.project-tab-new:hover {
    background: rgba(81, 207, 102, 0.1);
    color: #51cf66;
}

/* Empty State */
.project-tabs-empty {
    padding: 12px 16px;
    color: #666;
    font-size: 13px;
    font-style: italic;
}

/* ============================================================
   Session Tabs (Level 2)
   ============================================================ */

#session-tabs {
    background: #151515;
    border-bottom: 1px solid #333;
    padding: 0;
}

.session-tabs {
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 2px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: #444 #151515;
}

.session-tabs::-webkit-scrollbar {
    height: 4px;
}

.session-tabs::-webkit-scrollbar-track {
    background: #151515;
}

.session-tabs::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 2px;
}

.session-tabs::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Session Tab Button */
.session-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 6px 6px 0 0;
    color: #888;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-width: 0;
    position: relative;
}

.session-tab:hover {
    background: #222;
    color: #e0e0e0;
}

.session-tab:hover .tab-close {
    opacity: 1;
}

.session-tab.active {
    background: #1a1a1a;
    color: #e0e0e0;
    border-bottom-color: #51cf66;
}

.session-tab.running {
    color: #4a9eff;
}

.session-tab.running .tab-indicator {
    display: block;
}

.session-tab .tab-icon {
    font-size: 12px;
    flex-shrink: 0;
}

.session-tab .tab-label {
    flex: 1;
    min-width: 0;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-tab .tab-indicator {
    display: none;
    width: 6px;
    height: 6px;
    background: #4a9eff;
    border-radius: 50%;
    flex-shrink: 0;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.session-tab .tab-close {
    opacity: 0;
    font-size: 16px;
    line-height: 1;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.session-tab .tab-close:hover {
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
}

/* New Session Tab */
.session-tab-new {
    color: #51cf66;
    padding: 8px 12px;
}

.session-tab-new:hover {
    background: rgba(81, 207, 102, 0.1);
    color: #51cf66;
}

/* Empty State */
.session-tabs-empty {
    padding: 10px 16px;
    color: #666;
    font-size: 12px;
    font-style: italic;
}

/* ============================================================
   Context Menu
   ============================================================ */

.context-menu {
    position: fixed;
    background: #2a2a2a;
    border: 1px solid #444;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    min-width: 180px;
    padding: 4px 0;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: none;
    border: none;
    color: #e0e0e0;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s ease;
    width: 100%;
    text-align: left;
}

.context-menu-item:hover {
    background: #3a3a3a;
}

.context-menu-item.danger {
    color: #ff6b6b;
}

.context-menu-item.danger:hover {
    background: rgba(255, 107, 107, 0.1);
}

.context-menu-divider {
    height: 1px;
    background: #444;
    margin: 4px 0;
}

.menu-icon {
    font-size: 14px;
    width: 20px;
    text-align: center;
}

/* ============================================================
   Empty Project State
   ============================================================ */

.empty-project-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.empty-project-state .empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-project-state h3 {
    color: #e0e0e0;
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px 0;
}

.empty-project-state p {
    color: #888;
    font-size: 14px;
    margin: 0 0 24px 0;
}

/* ============================================================
   Responsive Design
   ============================================================ */

@media (max-width: 768px) {
    .project-tabs,
    .session-tabs {
        padding: 0 4px;
    }

    .project-tab {
        padding: 8px 10px;
        font-size: 12px;
    }

    .project-tab .tab-label {
        max-width: 80px;
    }

    .session-tab {
        padding: 6px 10px;
        font-size: 11px;
    }

    .session-tab .tab-label {
        max-width: 100px;
    }

    .context-menu {
        min-width: 160px;
    }
}

@media (max-width: 480px) {
    .project-tab .tab-count {
        display: none;
    }

    .session-tab .tab-close {
        opacity: 1;
    }
}

/* ============================================================
   Animations
   ============================================================ */

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

.project-tab,
.session-tab {
    animation: tabFadeIn 0.15s ease-out;
}

/* ============================================================
   Drag and Drop (Future Enhancement)
   ============================================================ */

.project-tab.dragging,
.session-tab.dragging {
    opacity: 0.5;
}

.project-tab.drag-over,
.session-tab.drag-over {
    background: rgba(74, 158, 255, 0.1);
    border-bottom-color: #4a9eff;
}

/* ============================================================
   Tab Close Button Animation
   ============================================================ */

.tab-close {
    transform-origin: center;
    transition: transform 0.2s ease;
}

.tab-close:hover {
    transform: rotate(90deg);
}

/* ============================================================
   Scroll Buttons for Overflow (Optional Enhancement)
   ============================================================ */

.tabs-scroll-button {
    display: none; /* Show only when needed via JS */
    width: 32px;
    height: 100%;
    background: #1a1a1a;
    border: none;
    color: #888;
    font-size: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.tabs-scroll-button:hover {
    background: #252525;
    color: #e0e0e0;
}

.tabs-scroll-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}