/* ============================================
   SHIFT AI Dashboard - Modern Dark Theme
   ============================================ */

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-hover: #1f2940;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-success: #48bb78;
    --accent-warning: #ed8936;
    --accent-danger: #f56565;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1a2e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
}

/* ============================================
   Sidebar Navigation
   ============================================ */

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 0 20px 30px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 12px;
    color: var(--text-secondary);
}

.nav-items {
    flex: 1;
    padding: 0 12px;
}

.nav-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    margin-bottom: 6px;
}

.nav-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.nav-btn .icon {
    font-size: 18px;
}

/* ============================================
   Main Content Area
   ============================================ */

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 30px 40px;
    min-height: 100vh;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-description {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============================================
   KPI Cards
   ============================================ */

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kpi-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.kpi-gradient-1 {
    border-left: 4px solid #667eea;
}

.kpi-gradient-2 {
    border-left: 4px solid #48bb78;
}

.kpi-gradient-3 {
    border-left: 4px solid #ed8936;
}

.kpi-gradient-4 {
    border-left: 4px solid #f56565;
}

.kpi-gradient-5 {
    border-left: 4px solid #9f7aea;
}

.kpi-gradient-6 {
    border-left: 4px solid #38b2ac;
}

.kpi-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.kpi-value {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, #a0aec0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.kpi-label {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ============================================
   Chart Cards
   ============================================ */

.chart-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.chart-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    /* Phase 24 */
}

.chart-card.full-width {
    grid-column: span 2;
}

.chart-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.chart-container {
    height: 300px;
}

.chart-container-large {
    height: 450px;
}

/* ============================================
   Controls Card
   ============================================ */

.controls-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-group label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.control-group select {
    padding: 10px 16px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    min-width: 180px;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.control-group select:hover,
.control-group select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
}

/* ============================================
   Course Selection Card
   ============================================ */

.course-selection-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 24px;
}

.course-selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
}

.selection-count {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.selection-buttons {
    display: flex;
    gap: 8px;
}

.btn-small {
    padding: 6px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.course-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    padding: 4px;
}

.course-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.course-item:hover {
    border-color: var(--accent-primary);
}

.course-item.selected {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: transparent;
    color: white;
}

.course-item input {
    display: none;
}

/* ============================================
   Table Card
   ============================================ */

.table-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    overflow-x: auto;
}

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

th,
td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.3s ease;
}

th:hover {
    color: var(--accent-primary);
}

td {
    font-size: 14px;
}

tbody tr {
    transition: background 0.3s ease;
}

tbody tr:hover {
    background: var(--bg-hover);
}

/* Heatmap colors for table cells */
.heatmap-1 {
    background: rgba(245, 101, 101, 0.3);
}

.heatmap-2 {
    background: rgba(237, 137, 54, 0.3);
}

.heatmap-3 {
    background: rgba(236, 201, 75, 0.3);
}

.heatmap-4 {
    background: rgba(72, 187, 120, 0.2);
}

.heatmap-5 {
    background: rgba(72, 187, 120, 0.4);
}

/* ============================================
   Cluster Insights
   ============================================ */

.cluster-summary-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.cluster-summary-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cluster-insights {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
}

.cluster-insights h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

/* 満足度比較用円グラフグリッド (Phase 17/25) */
.dist-pie-grid {
    display: grid;
    /* 画面幅に応じて4,3,2,1列と柔軟に変化するように修正 */
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.pie-card-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 420px;
    /* 少し高さを確保 */
}

.pie-chart-box {
    flex: 1;
    min-height: 320px;
    width: 100%;
    margin: 0 auto;
    position: relative;
}

@media (max-width: 1000px) {
    .dist-pie-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

.insight-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.insight-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.insight-card .cluster-badge {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
}

.insight-card .meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.insight-card ul {
    font-size: 13px;
    padding-left: 18px;
    color: var(--text-secondary);
}

.insight-card li {
    margin-bottom: 4px;
}

/* Cluster colors */
.cluster-0 {
    background: rgba(102, 126, 234, 0.3);
    border-color: #667eea;
}

.cluster-1 {
    background: rgba(72, 187, 120, 0.3);
    border-color: #48bb78;
}

.cluster-2 {
    background: rgba(237, 137, 54, 0.3);
    border-color: #ed8936;
}

.cluster-3 {
    background: rgba(159, 122, 234, 0.3);
    border-color: #9f7aea;
}

.cluster-4 {
    background: rgba(245, 101, 101, 0.3);
    border-color: #f56565;
}

/* ============================================
   Scrollbar
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

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

@media (max-width: 1200px) {
    .chart-row {
        grid-template-columns: 1fr;
    }

    .chart-card.full-width {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 80px;
        padding: 15px 0;
    }

    .sidebar-header {
        padding: 0 10px 20px;
    }

    .logo-text,
    .subtitle,
    .nav-btn span:not(.icon) {
        display: none;
    }

    .nav-btn {
        justify-content: center;
        padding: 14px;
    }

    .main-content {
        margin-left: 80px;
        padding: 20px;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}