:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    min-height: 100vh;
}

.custom-navbar {
    background-color: rgba(0,0,0,0.8); 
    backdrop-filter: blur(10px); 
}

.container {
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-top: 20px;
}

h1, h3 {
    color: var(--dark-color);
    font-weight: bold;
}

.dna-visualization {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

#dnaCanvas {
    width: 100%;
    height: 300px;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-primary:hover, .btn-secondary:hover {
    transform: translateY(-5px);
    box-shadow: 0 7px 14px rgba(0,0,0,0.15);
}

.info-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.info-card:hover {
    transform: translateY(-10px);
}

.codon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.codon-item {
    background-color: var(--secondary-color);
    color: white;
    border-radius: 4px;
    padding: 5px;
    text-align: center;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.codon-item:hover {
    transform: scale(1.05);
    background-color: var(--primary-color);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.5s ease-out;
}