/* PIPELINES CUSTOM STYLE SHEET */

:root {
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-indigo: #6366f1;
    --accent-amber: #f59e0b;
    --accent-rose: #f43f5e;
    
    --timeline-line-width: 3px;
}

/* Dashboard Grid */
.pipelines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* Glassmorphic Pipeline Card */
.pipeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                box-shadow 0.3s ease, 
                border-color 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.pipeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--theme-color, var(--accent-cyan));
    transition: width 0.2s ease;
}

.pipeline-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    border-color: var(--theme-color, var(--accent-cyan));
}

.pipeline-card:hover::before {
    width: 6px;
}

.pipeline-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.pipeline-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    transition: color 0.2s ease;
}

.pipeline-card:hover .pipeline-card-title {
    color: var(--theme-color, var(--accent-cyan));
}

.pipeline-card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--theme-color, var(--accent-cyan));
    background: rgba(255, 255, 255, 0.03);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.pipeline-card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.5rem;
}

.pipeline-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1rem;
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.pipeline-card-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

/* Detail view Layout */
.detail-header-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.detail-header-left {
    flex: 1;
    min-width: 300px;
}

.detail-header-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 180px;
    text-align: center;
}

.meta-chip {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Circular Progress Representation */
.progress-ring-container {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: radial-gradient(closest-side, var(--bg-card) 79%, transparent 80% 100%),
                conic-gradient(var(--pipeline-accent, var(--accent-cyan)) var(--progress-deg, 0deg), var(--border-color) 0deg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.progress-ring-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Toolbar */
.pipeline-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.tabs-container {
    display: flex;
    background: rgba(255, 255, 255, 0.02);
    padding: 0.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tab-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--bg-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin: -1px;
}

.toolbar-actions {
    display: flex;
    gap: 0.75rem;
}

/* Vertical Timeline (Path View) */
.timeline-container {
    padding: 2rem 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-path {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

/* Central vertical connection line */
.timeline-path::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 2rem;
    bottom: 2rem;
    width: var(--timeline-line-width);
    background: var(--border-color);
    z-index: 1;
}

.timeline-node {
    display: flex;
    position: relative;
    z-index: 2;
}

/* Dynamic glow connection line colors based on status */
.timeline-node-connector {
    position: absolute;
    left: 20px;
    top: 2rem;
    height: calc(100% + 2.5rem);
    width: var(--timeline-line-width);
    background: var(--border-color);
    margin-left: -1px; /* Align precisely */
    z-index: 1;
}

.timeline-node-connector.completed {
    background: var(--accent-emerald);
    box-shadow: 0 0 8px var(--accent-emerald);
}

.timeline-node-connector.in_progress {
    background: linear-gradient(to bottom, var(--accent-indigo) 50%, var(--border-color) 100%);
}

.timeline-node-dot {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    z-index: 3;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

/* Glow effects based on node status */
.timeline-node.completed .timeline-node-dot {
    border-color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.timeline-node.in_progress .timeline-node-dot {
    border-color: var(--accent-indigo);
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-indigo);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
    animation: dotPulse 2s infinite;
}

.timeline-node.review .timeline-node-dot {
    border-color: var(--accent-amber);
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-amber);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.timeline-node-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-left: 2rem;
    flex-grow: 1;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.timeline-node-card:hover {
    transform: translateX(6px);
    border-color: var(--pipeline-accent, var(--accent-cyan));
    background: rgba(255, 255, 255, 0.02);
}

.node-meta-left {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex-grow: 1;
}

.node-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.node-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.node-meta-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

/* Kanban Board View */
.kanban-container {
    display: flex;
    gap: 1.25rem;
    overflow-x: auto;
    padding-bottom: 1.5rem;
    min-height: 500px;
}

.kanban-column {
    flex: 1;
    min-width: 270px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: background-color 0.2s ease;
}

.kanban-column.drag-over {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--pipeline-accent, var(--accent-cyan));
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 0.25rem;
}

.col-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.col-count {
    background: var(--border-color);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
}

.kanban-cards-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 400px;
}

.kanban-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    cursor: grab;
    transition: transform 0.2s ease, border-color 0.2s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.kanban-card:active {
    cursor: grabbing;
}

.kanban-card:hover {
    transform: translateY(-2px);
    border-color: var(--pipeline-accent, var(--accent-cyan));
}

.kanban-card-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.kanban-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Modals and forms styling */
.color-picker-grid {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.color-option-container {
    cursor: pointer;
    position: relative;
    display: inline-block;
}

.color-option-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.color-preview {
    display: block;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.color-option-container input:checked ~ .color-preview {
    border-color: var(--text-primary);
    transform: scale(1.15);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

/* Step Detail Modal - Study HUD structure */
.step-detail-content {
    padding: 0;
    overflow: hidden;
}

.study-hud-body {
    display: grid;
    grid-template-columns: 3fr 2fr;
    max-height: 80vh;
    overflow: hidden;
}

.study-left {
    padding: 1.5rem 2rem;
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
}

.study-right {
    padding: 1.5rem 2rem;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.01);
}

.hud-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.text-accent {
    color: var(--pipeline-accent, var(--accent-cyan));
}

.hud-widget {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

.hud-widget h5 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Difficulty Badge */
.difficulty-badge {
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-beginner {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
}

.badge-intermediate {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-indigo);
}

.badge-advanced {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* Resource List Item */
.resource-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.6rem 1rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    transition: var(--transition);
}

.resource-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.resource-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.resource-link:hover {
    color: var(--pipeline-accent, var(--accent-cyan));
    text-decoration: underline;
}

.resource-type-badge {
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    background: var(--border-color);
    color: var(--text-secondary);
}

.resource-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Subtask Checklist Item */
.subtask-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

.subtask-check-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    color: var(--text-primary);
    width: 100%;
}

.subtask-checkbox {
    width: 15px;
    height: 15px;
    cursor: pointer;
}

.subtask-item.completed span {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.subtask-delete-btn, .resource-delete-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.2rem;
    transition: color 0.2s ease;
}

.subtask-delete-btn:hover, .resource-delete-btn:hover {
    color: var(--danger);
}

/* Status Pill Buttons in study right */
.status-pill-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition);
}

.status-pill-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.status-pill-btn.active#btn-status-todo {
    background: rgba(148, 163, 184, 0.1);
    border-color: #94a3b8;
    color: #cbd5e1;
}

.status-pill-btn.active#btn-status-in_progress {
    background: rgba(59, 130, 246, 0.1);
    border-color: #3b82f6;
    color: #93c5fd;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.2);
}

.status-pill-btn.active#btn-status-review {
    background: rgba(245, 158, 11, 0.1);
    border-color: #f59e0b;
    color: #fde047;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.status-pill-btn.active#btn-status-completed {
    background: rgba(16, 185, 129, 0.1);
    border-color: #10b981;
    color: #a7f3d0;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

/* Animations */
@keyframes dotPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.6);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}

/* Responsive Grid layouts */
@media(max-width: 768px) {
    .study-hud-body {
        grid-template-columns: 1fr;
        max-height: 90vh;
    }
    .study-left {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}