.random-number .result-area {
    margin-top: 24px;
    padding: 24px;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #eef2f6;
    text-align: center;
}

.random-number .result-number {
    font-size: 3rem;
    font-weight: 800;
    color: #0f172a;
    display: block;
    margin-bottom: 12px;
}

.random-number .copy-btn {
    background: #3b82f6;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 10px 24px;
    font-size: 0.95rem;
    cursor: pointer;
}

.random-number .copy-btn:hover {
    background: #2563eb;
}