:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --success: #4cc9f0;
            --warning: #ffba08;
            --danger: #f94144;
            --gray: #adb5bd;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fb;
            color: var(--dark);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 20px 0;
            border-radius: 0 0 10px 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        .logo-icon {
            margin-right: 10px;
            font-size: 28px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 20px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: opacity 0.3s;
        }
        
        nav ul li a:hover {
            opacity: 0.8;
        }
        
        .main-content {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 20px;
        }
        
        .card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 20px;
            margin-bottom: 20px;
        }
        
        .card-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--secondary);
            display: flex;
            align-items: center;
        }
        
        .card-title i {
            margin-right: 10px;
        }
        
        .form-group {
            margin-bottom: 15px;
        }
        
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
        }
        
        input, select {
            width: 100%;
            padding: 10px;
            border: 1px solid var(--gray);
            border-radius: 5px;
            font-size: 16px;
        }
        
        button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            transition: background-color 0.3s;
        }
        
        button:hover {
            background-color: var(--secondary);
        }
        
        .btn-danger {
            background-color: var(--danger);
        }
        
        .btn-danger:hover {
            background-color: #d90429;
        }
        
        .relationship-map {
            min-height: 400px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 20px;
            position: relative;
            overflow: hidden;
        }
        
        .relationship-canvas {
            width: 100%;
            height: 100%;
            min-height: 400px;
            border: 1px dashed var(--gray);
            border-radius: 5px;
        }
        
        .people-list {
            list-style: none;
        }
        
        .people-list li {
            padding: 10px;
            background: var(--light);
            margin-bottom: 10px;
            border-radius: 5px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .relationship-item {
            padding: 10px;
            background: var(--light);
            margin-bottom: 10px;
            border-radius: 5px;
            border-left: 4px solid var(--primary);
        }
        
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        
        .stat-card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 20px;
            text-align: center;
        }
        
        .stat-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin: 10px 0;
        }
        
        .stat-label {
            color: var(--gray);
            font-weight: 500;
        }
        
        footer {
            text-align: center;
            margin-top: 50px;
            padding: 20px;
            color: var(--gray);
        }