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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    color: #eaeaea;
}

header {
    text-align: center;
    padding: 3rem 1rem;
    background: rgba(0, 0, 0, 0.2);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

main {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.simulation-list h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: #a0a0a0;
}

.simulation-list ul {
    list-style: none;
}

.simulation-link {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.simulation-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.2);
}

.simulation-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: #fff;
    margin-bottom: 0.5rem;
}

.simulation-description {
    font-size: 0.9rem;
    color: #888;
}