body {
    font-family: 'Nanum Gothic', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: radial-gradient(circle, #d7d7d7 1px, transparent 1px);
    background-size: 20px 20px;
}

.container {
    text-align: center;
    background-color: #ffffff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 90%;
    width: 500px;
}

h1 {
    font-family: 'Do Hyeon', sans-serif;
    color: #2c3e50;
    font-size: 2.5em;
    margin-bottom: 30px;
}

.numbers-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
    min-height: 80px;
}

.number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8em;
    font-weight: bold;
    color: white;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.number:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.number.bonus {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

button {
    font-family: 'Do Hyeon', sans-serif;
    font-size: 1.5em;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 15px 40px;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

button:active {
    transform: scale(1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}