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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 600px;
    width: 100%;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2.5rem;
    font-weight: 700;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin: 40px 0;
    flex-wrap: wrap;
    min-height: 80px;
}

.lotto-ball {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: bounce 0.6s ease-out;
}

@keyframes bounce {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.2) rotate(180deg);
    }
    100% {
        transform: scale(1) rotate(360deg);
        opacity: 1;
    }
}

/* 번호별 색상 */
.lotto-ball.color-1 { background: linear-gradient(135deg, #fbc02d 0%, #f57f17 100%); }
.lotto-ball.color-2 { background: linear-gradient(135deg, #42a5f5 0%, #1565c0 100%); }
.lotto-ball.color-3 { background: linear-gradient(135deg, #ef5350 0%, #c62828 100%); }
.lotto-ball.color-4 { background: linear-gradient(135deg, #66bb6a 0%, #2e7d32 100%); }
.lotto-ball.color-5 { background: linear-gradient(135deg, #ab47bc 0%, #6a1b9a 100%); }

#generate-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

#generate-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }
    
    .lotto-ball {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .container {
        padding: 30px 20px;
    }
}