body {
    background-color: #2e2e2e;
    color: #f0f0f0;
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    background-color: #3a3a3a;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    width: 340px;
}
h2 {
    text-align: center;
    margin-bottom: 20px;
}
label {
    display: block;
    margin-top: 12px;
}
input {
    width: 100%;
    padding: 6px;
    margin-top: 4px;
    border: none;
    border-radius: 4px;
    background-color: #4d4d4d;
    color: #f0f0f0;
    font-size: 1rem;
}
input[readonly] {
    background-color: #2e2e2e;
}
button {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    border: none;
    border-radius: 6px;
    background: linear-gradient(135deg, #4a90e2, #357ab8);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}
button:hover {
    background: linear-gradient(135deg, #5ba0f2, #4a86c8);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}
button:active {
    transform: translateY(0);
    box-shadow: 0 3px 4px rgba(0, 0, 0, 0.1);
}