:root {
    --primary-color: #2a9d8f;
    --secondary-color: #264653;
    --accent-color: #e9c46a;
}

.tracker-header {
    background: linear-gradient(135deg, var(--primary-color), #4CAF50);
    color: white;
    padding: 2.5rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border: none;
}

/* Rest of the vitamin tracker specific styles */
<style>
        :root {
            --primary-color: #2a9d8f;
            --secondary-color: #264653;
            --accent-color: #e9c46a;
        }

        body {
            font-family: 'Poppins', sans-serif;
        }

        .tracker-header {
            background: linear-gradient(135deg, var(--primary-color), #4CAF50);
            color: white;
            padding: 2.5rem;
            border-radius: 15px;
            margin-bottom: 2rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            border: none;
        }

        .tracker-header h1 {
            font-weight: 600;
            letter-spacing: 0.5px;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
            font-size: 2.5rem;
        }

        .tracker-header .lead {
            font-weight: 400;
            letter-spacing: 0.3px;
            opacity: 0.9;
            font-size: 1.1rem;
        }

        .vitamin-card {
            transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            border: none;
            border-radius: 12px;
        }

        .card-header {
            background: var(--secondary-color) !important;
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .progress {
            height: 28px;
            border-radius: 8px;
            overflow: visible;
        }

        .progress-bar {
            border-radius: 8px;
            position: relative;
            overflow: visible;
        }

        .progress-bar::after {
            content: attr(aria-valuenow);
            position: absolute;
            right: 10px;
            color: white;
            font-weight: 500;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
        }

        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 10px 25px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            background-color: #228176;
            transform: translateY(-1px);
        }

        .form-select:focus, .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(42,157,143,0.25);
        }
    </style>