:root {
            --primary-color: #4CAF50; /* Green */
            --primary-dark: #388E3C;
            --primary-light: #A5D6A7;
            --secondary-color: #2196F3; /* Blue */
            --secondary-dark: #1976D2;
            --secondary-light: #90CAF9;
        }
        
        body {
            background-color: #f9f9f9;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .primary-bg {
            background-color: var(--primary-color);
        }
        
        .primary-text {
            color: var(--primary-color);
        }
        
        .secondary-bg {
            background-color: var(--secondary-color);
        }
        
        .secondary-text {
            color: var(--secondary-color);
        }
        
        .card {
            border-radius: 12px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .input-field {
            transition: all 0.3s ease;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
        }
        
        .input-field:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.3);
            outline: none;
        }
        
        .btn {
            transition: all 0.3s ease;
            border-radius: 8px;
            font-weight: 600;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
        }
        
        .btn-secondary {
            background-color: var(--secondary-color);
            color: white;
        }
        
        .btn-secondary:hover {
            background-color: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(33, 150, 243, 0.4);
        }
        
        .bg-pattern {
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%234CAF50' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }
        
        @keyframes float {
            0% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
            100% {
                transform: translateY(0px);
            }
        }
        
        .float {
            animation: float 3s ease-in-out infinite;
        }
        
        .float-delay-1 {
            animation: float 3s ease-in-out 0.5s infinite;
        }
        
        .float-delay-2 {
            animation: float 3s ease-in-out 1s infinite;
        }
        
        /* Vector graphics for B12 and food items */
        .b12-vitamin {
            fill: var(--primary-color);
            opacity: 0.7;
        }
        
        .vegan-food {
            fill: var(--secondary-color);
            opacity: 0.7;
        }
        
        .recommendation-circle {
            position: relative;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            width: 180px;
            height: 180px;
            margin: 0 auto;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            transition: transform 0.3s ease;
        }
        
        .recommendation-circle:hover {
            transform: scale(1.05);
        }
        
        .recommendation-inner {
            background-color: rgba(255, 255, 255, 0.9);
            border-radius: 50%;
            width: 160px;
            height: 160px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        
        .info-icon {
            position: relative;
            cursor: pointer;
        }
        
        .info-tooltip {
            visibility: hidden;
            position: absolute;
            z-index: 10;
            width: 250px;
            background-color: #333;
            color: white;
            text-align: center;
            border-radius: 6px;
            padding: 8px;
            opacity: 0;
            transition: opacity 0.3s;
            bottom: 125%;
            left: 50%;
            margin-left: -125px;
            font-size: 0.8rem;
        }
        
        .info-icon:hover .info-tooltip {
            visibility: visible;
            opacity: 1;
        }