* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

h3 {
    color: #34495e;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.intro-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.intro-section p {
    margin-bottom: 1rem;
    color: #555;
}

.intro-section ul {
    list-style-type: none;
    margin-left: 1rem;
}

.intro-section li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.intro-section li:before {
    content: "•";
    color: #3498db;
    position: absolute;
    left: 0;
}

.tutorial-links {
    margin-top: 2rem;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.tutorial-link {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tutorial-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.tutorial-link h3 {
    color: #3498db;
    margin-bottom: 0.5rem;
}

.tutorial-link p {
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .link-grid {
        grid-template-columns: 1fr;
    }
}

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

.tutorial-link {
    animation: fadeIn 0.5s ease-out forwards;
}

.tutorial-link:nth-child(2) {
    animation-delay: 0.1s;
}

.tutorial-link:nth-child(3) {
    animation-delay: 0.2s;
}

.tutorial-link:nth-child(4) {
    animation-delay: 0.3s;
}

.tutorial-link:nth-child(5) {
    animation-delay: 0.4s;
}

.tutorial-link:nth-child(6) {
    animation-delay: 0.5s;
}

.tutorial-link:nth-child(7) {
    animation-delay: 0.6s;
}

.tutorial-link:nth-child(8) {
    animation-delay: 0.7s;
}

.tutorial-link:nth-child(9) {
    animation-delay: 0.8s;
}

.tutorial-link:nth-child(10) {
    animation-delay: 0.9s;
}

.tutorial-link:nth-child(11) {
    animation-delay: 1s;
}

.tutorial-link:nth-child(12) {
    animation-delay: 1.1s;
}