/**
 * Bottleneck Detection Tool Styles
 * Following Process Insight Design System
 * Reference: docs/DESIGN_SYSTEM.md
 * NO ICONS/LOGOS - Text only
 */

.bottleneck-container {
    padding: 0;
    max-width: 100%;
}

.bottleneck-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-primary);
}

.bottleneck-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 40px;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.empty-state p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Summary Section */
.summary-section {
    margin-bottom: 40px;
}

.summary-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.metric-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.metric-value {
    color: var(--accent-primary);
    font-size: 2rem;
    font-weight: 700;
}

.metric-value.critical {
    color: var(--error);
}

.metric-value.warning {
    color: var(--warning);
}

.metric-value.success {
    color: var(--success);
}

/* Performance Hotspots Section */
.hotspots-section {
    margin-bottom: 40px;
}

.hotspots-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hotspots-table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 10px;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-primary);
}

.data-table th {
    padding: 15px 12px;
    text-align: left;
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 15px 12px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-secondary);
    font-size: 0.875rem;
}

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.rank-cell {
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
}

.activity-cell {
    font-weight: 500;
    color: var(--text-primary);
}

.total-time-cell {
    font-weight: 600;
    color: var(--warning);
}

/* Severity Badges */
.severity-badge {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.severity-badge.severity-critical {
    background: var(--error);
    color: var(--bg-primary);
}

.severity-badge.severity-high {
    background: var(--warning);
    color: var(--bg-primary);
}

.severity-badge.severity-medium {
    background: var(--info);
    color: var(--bg-primary);
}

.severity-badge.severity-low {
    background: var(--success);
    color: var(--bg-primary);
}

/* Impact Bar */
.impact-bar-container {
    position: relative;
    width: 100px;
    height: 20px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
}

.impact-bar {
    height: 100%;
    background: var(--accent-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.impact-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Root Cause Section */
.root-cause-section {
    margin-bottom: 40px;
}

.root-cause-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.root-causes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.root-cause-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 8px var(--shadow-sm);
}

.cause-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.cause-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.cause-confidence {
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.cause-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.cause-details {
    border-top: 1px solid var(--border-secondary);
    padding-top: 15px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.detail-item:last-child {
    margin-bottom: 0;
}

.detail-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.detail-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Recommendations Section */
.recommendations-section {
    margin-bottom: 40px;
}

.recommendations-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.recommendation-card {
    display: flex;
    gap: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 8px var(--shadow-sm);
}

.recommendation-card.priority-high {
    border-left: 4px solid var(--error);
}

.recommendation-card.priority-medium {
    border-left: 4px solid var(--warning);
}

.recommendation-card.priority-low {
    border-left: 4px solid var(--success);
}

.rec-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 8px;
    font-size: 1.25rem;
    font-weight: 700;
}

.rec-content {
    flex: 1;
}

.rec-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.rec-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.priority-badge {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.priority-badge.priority-high {
    background: var(--error);
    color: var(--bg-primary);
}

.priority-badge.priority-medium {
    background: var(--warning);
    color: var(--bg-primary);
}

.priority-badge.priority-low {
    background: var(--success);
    color: var(--bg-primary);
}

.rec-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.rec-benefits {
    display: flex;
    gap: 30px;
    margin-bottom: 15px;
    padding: 12px 0;
    border-top: 1px solid var(--border-secondary);
    border-bottom: 1px solid var(--border-secondary);
}

.benefit-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.benefit-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.benefit-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.rec-steps {
    margin-top: 15px;
}

.steps-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.rec-steps ol {
    margin-left: 20px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.rec-steps li {
    margin-bottom: 8px;
}

.rec-steps li:last-child {
    margin-bottom: 0;
}

/* Buttons */
.btn-primary {
    background: var(--accent-primary);
    color: var(--text-on-primary);
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--shadow-glow);
    transition: all 0.2s ease;
}

.btn-primary:hover {
    box-shadow: 0 4px 12px var(--shadow-glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .root-causes-grid {
        grid-template-columns: 1fr;
    }

    .rec-benefits {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .bottleneck-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .recommendation-card {
        flex-direction: column;
    }

    .rec-number {
        width: 100%;
        height: 40px;
    }

    .hotspots-table-container {
        overflow-x: auto;
    }

    .data-table {
        font-size: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: 10px 8px;
    }
}