:root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --warning-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
            --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --card-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
            --border-radius: 16px;
            --border-radius-sm: 12px;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .navbar {
            background: var(--primary-gradient) !important;
            box-shadow: 0 8px 32px rgba(102, 126, 234, 0.25);
            backdrop-filter: blur(10px);
            border: none;
        }
        
        .navbar-brand {
            font-weight: 600;
            font-size: 1.3rem;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        
        .step-indicator {
            counter-reset: step;
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            margin-bottom: 2rem;
        }
        .step-indicator li {
            counter-increment: step;
            position: relative;
            padding: 1rem 0;
            font-weight: 500;
        }
        .step-indicator li::before {
            content: counter(step);
            position: absolute;
            left: -3rem;
            top: 50%;
            transform: translateY(-50%);
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
            color: #6c757d;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }
        .step-indicator li.active::before {
            background: var(--primary-gradient);
            color: white;
            transform: translateY(-50%) scale(1.1);
        }
        .step-indicator li.completed::before {
            background: var(--success-gradient);
            content: "✓";
            color: white;
            transform: translateY(-50%) scale(1.05);
        }
        
        .card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        
        .card-header {
            background: var(--primary-gradient) !important;
            border: none;
            padding: 1.5rem;
        }
        .card-header.bg-warning {
            background: var(--warning-gradient) !important;
        }
        .card-header.bg-info {
            background: var(--success-gradient) !important;
        }
        
        .result-card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .result-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        
        .number-highlight {
            font-size: 2rem;
            font-weight: 700;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .chart-container {
            position: relative;
            height: 350px;
            margin: 20px 0;
            background: white;
            border-radius: var(--border-radius-sm);
            padding: 1rem;
        }
        
        .btn-primary {
            background: var(--primary-gradient);
            border: none;
            border-radius: var(--border-radius-sm);
            padding: 0.75rem 2rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
        }
        
        .btn-outline-secondary {
            border-radius: var(--border-radius-sm);
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .form-control, .form-select {
            border: 2px solid #e9ecef;
            border-radius: var(--border-radius-sm);
            padding: 0.75rem 1rem;
            transition: all 0.3s ease;
        }
        .form-control:focus, .form-select:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
        }
        
        .table {
            border-radius: var(--border-radius-sm);
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
        }
        
        .alert {
            border: none;
            border-radius: var(--border-radius-sm);
            padding: 1.5rem;
        }
        
        .text-success {
            color: #00f2fe !important;
        }
        
        .bg-light {
            background: transparent !important;
        }
        
        /* アニメーション効果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .card, .result-card {
            animation: fadeInUp 0.6s ease-out;
        }
        
        /* グラデーション背景のテーブル行 */
        .table-warning {
            background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%) !important;
        }
        .table-info {
            background: linear-gradient(135deg, #d1ecf1 0%, #a8e6cf 100%) !important;
        }
        .table-light {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
        }