body {
    font-family: 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: linear-gradient(to top, #cfd9df 0%, #e2ebf0 100%);
}

.container {
    background-color: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 500px;
    border: 1px solid #e0e0e0;
}

h1 {
    color: #1a73e8;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    background-color: #4285f4;
    color: #fff;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(66, 133, 244, 0.4);
    transition: transform 0.3s ease;
}

.number:hover {
    transform: translateY(-5px);
}

#generate-btn {
    background-color: #1a73e8;
    color: #fff;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

#generate-btn:hover {
    background-color: #155ab6;
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

.history {
    margin-top: 2rem;
    text-align: left;
}

h2 {
    color: #5f6368;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

#history-list {
    list-style: none;
    padding: 0;
    max-height: 200px;
    overflow-y: auto;
}

#history-list li {
    background-color: #f8f9fa;
    padding: 0.8rem 1rem;
    border-radius: 6px;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #3c4043;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #e8eaed;
}