* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: rgb(36, 33, 33);
    color: white;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 1rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: rgb(213, 236, 195);
}

header p {
    font-size: 1.2rem;
    color: #aaa;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
}

.visualization-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.3s ease;
}

.visualization-link:hover {
    transform: translateY(-10px);
}

.card {
    background-color: rgb(64, 68, 67);
    border-radius: 10px;
    overflow: hidden;
    width: 350px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
    background-color: rgb(74, 78, 77);
}

.card-icon {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgb(23, 23, 34);
    padding: 2rem;
}

.card-icon img {
    max-width: 100%;
    max-height: 100%;
}

.card-content {
    padding: 1.5rem;
}

.card-content h2 {
    color: rgb(174, 182, 152);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.card-content p {
    color: #ddd;
    font-size: 1rem;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1rem;
    color: #666;
}

@media (max-width: 768px) {
    .main-navigation ul {
        flex-direction: column;
        align-items: center;
    }
    
    .card {
        width: 100%;
        max-width: 350px;
    }
    
    header h1 {
        font-size: 2rem;
    }
}