/* ============================================================
   PARETO ANALYSIS — Complete Styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;700;800&family=Space+Mono:wght@400;700&display=swap');

/* ============================================================
   CSS VARIABLES
   ============================================================ */
.pa-container {
    --pa-vital: #e74c3c;
    --pa-vital-bg: rgba(231, 76, 60, 0.12);
    --pa-useful: #3498db;
    --pa-useful-bg: rgba(52, 152, 219, 0.12);
    --pa-purple: #a855f7;
    --pa-purple-deep: #6c3fc5;
    --pa-success: #27ae60;
    --pa-radius: 16px;
    --pa-radius-sm: 10px;
    --pa-transition: all 0.3s ease;
    --pa-font-head: 'Outfit', sans-serif;
    --pa-font-mono: 'Space Mono', monospace;
}

/* ============================================================
   CONTAINER
   ============================================================ */
.pa-container {
    display: flex;
    flex-direction: column;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.pa-container .tool-wrapper {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    position: relative;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.pa-container .tool-wrapper {
    visibility: visible !important;
    opacity: 1 !important;
}

/* ============================================================
   CONTROLS PANEL - HORIZONTAL TOP
   ============================================================ */
.pa-controls-horizontal {
    background: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border);
    padding: 16px 24px;
    flex-shrink: 0;
    z-index: 10;
}

.pa-controls-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Header */
.pa-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.pa-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.pa-title {
    font-family: var(--pa-font-head);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
    letter-spacing: -0.3px;
}

.pa-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
}

.pa-header-right {
    display: flex;
    align-items: center;
}

/* Legend */
.pa-legend-horizontal {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    opacity: 0.7;
}

.pa-legend-dot {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    display: inline-block;
    margin-right: 2px;
}

.pa-legend-dot.pa-vital-few { background: var(--pa-vital); }
.pa-legend-dot.pa-useful-many { background: var(--pa-useful); }

/* ============================================================
   CONTROLS ROW
   ============================================================ */
.pa-controls-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: nowrap;
}

.pa-add-section {
    flex: 1;
    min-width: 0;
}

.pa-add-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.pa-add-row input[type="text"] {
    flex: 2;
    min-width: 150px;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--pa-radius-sm);
    font-family: var(--pa-font-head);
    font-size: 0.9rem;
    color: var(--text);
    background: var(--bg);
    transition: var(--pa-transition);
}

.pa-add-row input[type="text"]:focus {
    outline: none;
    border-color: var(--pa-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}

.pa-add-row input[type="number"] {
    flex: 1;
    min-width: 100px;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--pa-radius-sm);
    font-family: var(--pa-font-mono);
    font-size: 0.9rem;
    color: var(--text);
    background: var(--bg);
    transition: var(--pa-transition);
}

.pa-add-row input[type="number"]:focus {
    outline: none;
    border-color: var(--pa-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}

.pa-add-row input::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.pa-add-row .spin-btn {
    flex-shrink: 0;
    padding: 10px 24px;
    font-size: 0.85rem;
    min-height: 42px;
    border-radius: var(--pa-radius-sm);
    margin: 0;
    white-space: nowrap;
}

.pa-actions-horizontal {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

.pa-actions-horizontal .spin-btn {
    min-height: 42px;
    font-size: 0.85rem;
    margin: 0;
    padding: 10px 16px;
    width: auto;
    white-space: nowrap;
}

.pa-actions-horizontal .spin-btn--ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-color);
    box-shadow: none;
    opacity: 0.6;
}

.pa-actions-horizontal .spin-btn--ghost:hover {
    opacity: 1;
    background: var(--card-bg);
    transform: none;
}

.pa-actions-horizontal .spin-btn--secondary {
    background: var(--secondary);
    box-shadow: 0 4px 14px rgba(52, 152, 219, 0.35);
}

/* Summary */
.pa-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 8px 0 0;
    border-top: 1px solid var(--panel-border);
}

.pa-summary-item {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.pa-summary-item strong {
    color: var(--text);
    font-weight: 700;
}

.pa-summary-vital strong { color: var(--pa-vital); }

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.pa-main-content {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    padding: 16px 24px 20px;
    gap: 20px;
    overflow-y: auto;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    min-height: 0;
}

/* ============================================================
   CHART PANEL
   ============================================================ */
.pa-chart-panel {
    width: 100%;
    background: var(--panel-bg);
    border-radius: var(--pa-radius);
    border: 1px solid var(--panel-border);
    overflow: hidden;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.pa-chart-header {
    padding: 14px 20px 10px;
    border-bottom: 1px solid var(--panel-border);
}

.pa-chart-title {
    font-family: var(--pa-font-head);
    font-size: 1rem;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 2px;
}

.pa-chart-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

.pa-chart-container {
    flex: 1;
    padding: 16px 20px 20px;
    min-height: 350px;
    position: relative;
}

.pa-chart-container canvas {
    width: 100% !important;
    height: 100% !important;
    max-height: 400px;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.pa-empty-matrix {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    background: var(--panel-bg);
    border-radius: var(--pa-radius);
    border: 1px solid var(--panel-border);
    flex: 0 0 auto;
    padding: 20px;
}

.pa-empty-matrix-content {
    text-align: center;
    padding: 16px 24px;
    max-width: 560px;
}

.pa-empty-matrix-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 8px;
    opacity: 0.5;
}

.pa-empty-matrix-content h3 {
    font-family: var(--pa-font-head);
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 4px;
}

.pa-empty-matrix-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 12px;
}

.pa-empty-steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    text-align: left;
}

.pa-empty-step {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: var(--card-bg);
    border-radius: var(--pa-radius-sm);
    border: 1px solid var(--panel-border);
}

.pa-empty-step-num {
    width: 22px;
    height: 22px;
    min-width: 22px;
    border-radius: 50%;
    background: var(--pa-purple);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.65rem;
}

.pa-empty-step span:last-child {
    font-size: 0.75rem;
    color: var(--text);
    font-weight: 500;
}

/* ============================================================
   TABLE PANEL
   ============================================================ */
.pa-table-panel {
    width: 100%;
    background: var(--panel-bg);
    border-radius: var(--pa-radius);
    border: 1px solid var(--panel-border);
    overflow: hidden;
}

.pa-table-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--panel-border);
}

.pa-table-title {
    font-family: var(--pa-font-head);
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
}

.pa-table-actions {
    display: flex;
    gap: 8px;
}

.pa-table-scroll {
    overflow-x: auto;
    padding: 4px;
}

/* Data Table */
.pa-data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--pa-font-head);
    font-size: 0.85rem;
}

.pa-data-table th,
.pa-data-table td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid var(--panel-border);
}

.pa-data-table th {
    background: var(--card-bg);
    color: var(--text);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 2;
    white-space: nowrap;
}

.pa-data-table td {
    color: var(--text);
}

.pa-data-table tr:hover td {
    background: rgba(168, 85, 247, 0.04);
}

.pa-data-table .pa-row-vital td {
    background: var(--pa-vital-bg);
    border-left: 3px solid var(--pa-vital);
}

.pa-data-table .pa-row-useful td {
    background: var(--pa-useful-bg);
    border-left: 3px solid var(--pa-useful);
}

.pa-data-table .pa-rank {
    font-weight: 700;
    color: var(--text-muted);
    font-family: var(--pa-font-mono);
    font-size: 0.8rem;
}

.pa-data-table .pa-value {
    font-family: var(--pa-font-mono);
    font-weight: 600;
}

.pa-data-table .pa-percent {
    font-family: var(--pa-font-mono);
    font-size: 0.8rem;
    font-weight: 600;
}

.pa-data-table .pa-cumulative {
    font-family: var(--pa-font-mono);
    font-size: 0.8rem;
    font-weight: 700;
}

.pa-data-table .pa-status {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 12px;
    display: inline-block;
}

.pa-status-vital {
    background: var(--pa-vital-bg);
    color: var(--pa-vital);
}

.pa-status-useful {
    background: var(--pa-useful-bg);
    color: var(--pa-useful);
}

.pa-data-table .pa-delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 2px 6px;
    border-radius: 4px;
    transition: var(--pa-transition);
    opacity: 0.3;
}

.pa-data-table .pa-delete-btn:hover {
    opacity: 1;
    color: var(--pa-vital);
    background: var(--pa-vital-bg);
}

/* ============================================================
   RESULTS PANEL
   ============================================================ */
.pa-results-panel {
    width: 100%;
    background: var(--panel-bg);
    border-radius: var(--pa-radius);
    border: 1px solid var(--panel-border);
    overflow: hidden;
}

.pa-results-header {
    padding: 12px 20px;
    border-bottom: 1px solid var(--panel-border);
}

.pa-results-title {
    font-family: var(--pa-font-head);
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
}

.pa-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    padding: 16px 20px 20px;
}

.pa-result-card {
    background: var(--card-bg);
    border-radius: var(--pa-radius-sm);
    border: 1px solid var(--panel-border);
    padding: 14px 16px;
    text-align: center;
    transition: var(--pa-transition);
}

.pa-result-card:hover {
    transform: translateY(-2px);
    border-color: rgba(168, 85, 247, 0.3);
}

.pa-result-card .pa-result-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pa-result-card .pa-result-value {
    font-family: var(--pa-font-mono);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    margin-top: 4px;
}

.pa-result-card.pa-result-vital .pa-result-value {
    color: var(--pa-vital);
}

.pa-result-card.pa-result-success .pa-result-value {
    color: var(--pa-success);
}

/* ============================================================
   CONTEXT HELP
   ============================================================ */
.pa-context-help {
    padding: 14px 24px;
    background: var(--bg);
    border-top: 1px solid var(--panel-border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.pa-context-help p {
    margin: 0;
    max-width: 800px;
    margin: 0 auto;
}

.pa-context-help strong {
    color: var(--text);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
    .pa-controls-horizontal {
        padding: 12px 16px;
    }
    
    .pa-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .pa-legend-horizontal {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .pa-controls-row {
        flex-direction: column;
        align-items: stretch;
        flex-wrap: wrap;
    }
    
    .pa-add-row {
        flex-wrap: wrap;
    }
    
    .pa-add-row input[type="text"] {
        min-width: 120px;
        flex: 2;
    }
    
    .pa-add-row input[type="number"] {
        min-width: 80px;
        flex: 1;
    }
    
    .pa-actions-horizontal {
        width: 100%;
        justify-content: stretch;
    }
    
    .pa-actions-horizontal .spin-btn {
        flex: 1;
        justify-content: center;
    }
    
    .pa-main-content {
        padding: 12px 16px 16px;
        gap: 16px;
    }
    
    .pa-chart-container {
        min-height: 280px;
        padding: 12px 16px 16px;
    }
    
    .pa-results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .pa-controls-horizontal {
        padding: 10px 12px;
    }
    
    .pa-title {
        font-size: 1.1rem;
    }
    
    .pa-subtitle {
        font-size: 0.75rem;
    }
    
    .pa-add-row {
        flex-direction: column;
        gap: 8px;
    }
    
    .pa-add-row input[type="text"],
    .pa-add-row input[type="number"] {
        min-width: 100%;
        width: 100%;
    }
    
    .pa-add-row .spin-btn {
        width: 100%;
    }
    
    .pa-main-content {
        padding: 10px 12px 14px;
        gap: 12px;
    }
    
    .pa-chart-container {
        min-height: 220px;
        padding: 8px 12px 12px;
    }
    
    .pa-data-table {
        font-size: 0.75rem;
    }
    
    .pa-data-table th,
    .pa-data-table td {
        padding: 6px 8px;
    }
    
    .pa-empty-steps {
        grid-template-columns: 1fr;
        gap: 6px;
    }
    
    .pa-results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        padding: 12px 16px 16px;
    }
    
    .pa-result-card .pa-result-value {
        font-size: 1.2rem;
    }
    
    .pa-context-help {
        padding: 10px 16px;
        font-size: 0.75rem;
    }
    
    .pa-summary {
        gap: 8px;
        font-size: 0.7rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .pa-controls-horizontal {
        padding: 8px;
    }
    
    .pa-legend-horizontal {
        font-size: 0.6rem;
        gap: 4px;
    }
    
    .pa-legend-dot {
        width: 8px;
        height: 8px;
    }
    
    .pa-chart-container {
        min-height: 180px;
        padding: 6px 8px 10px;
    }
    
    .pa-data-table {
        font-size: 0.7rem;
    }
    
    .pa-data-table th,
    .pa-data-table td {
        padding: 4px 6px;
    }
    
    .pa-results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
        padding: 10px 12px 14px;
    }
    
    .pa-result-card {
        padding: 10px 12px;
    }
    
    .pa-result-card .pa-result-value {
        font-size: 1rem;
    }
    
    .pa-empty-matrix {
        min-height: 150px;
        padding: 12px;
    }
    
    .pa-empty-matrix-content {
        padding: 10px 12px;
    }
    
    .pa-empty-matrix-icon {
        font-size: 2rem;
    }
    
    .pa-empty-matrix-content h3 {
        font-size: 0.95rem;
    }
    
    .pa-empty-matrix-content p {
        font-size: 0.75rem;
    }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes paSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.pa-row-vital,
.pa-row-useful {
    animation: paSlideIn 0.3s ease;
}

/* ============================================================
   CHART CUSTOMIZATION
   ============================================================ */
.pa-chart-container canvas {
    border-radius: var(--pa-radius-sm);
}