body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: #f0f2f5;
    background-image: url("data:image/svg+xml,%3Csvg width='6' height='6' viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%239C92AC' fill-opacity='0.1'%3E%3Cpath d='M5 0h1L0 6V5zM6 5v1H5z'/%3E%3C/g%3E%3C/svg%3E");
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
    box-sizing: border-box;
}

header {
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: bold;
    color: #4a47a3;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    margin: 0;
}

.lotto-container {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1), 0 6px 6px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
    max-width: 500px;
    box-sizing: border-box;
}

h2 {
    margin-top: 0;
    color: #4a47a3;
    font-size: 1.2rem;
}

.lotto-numbers {
    display: flex;
    gap: 0.8rem;
    margin: 1.5rem 0;
    justify-content: center;
    flex-wrap: wrap;
}

.generate-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 200px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.generate-btn:active {
    transform: translateY(0);
}

footer {
    margin-top: 2rem;
    font-size: 0.8rem;
    color: #666;
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    
    .lotto-container {
        padding: 1rem;
    }

    .lotto-numbers {
        gap: 0.5rem;
    }
}