body {
    font-family: Arial, sans-serif;
    font-size: 20px;
    background: #f0f3f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.container {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    width: 450px;
}

.text-center {
    text-align: center;
}

h2 {
    text-align: center;
}
form {
    display: flex;
    flex-direction: column;
}
input[type="text"], select, input[type="submit"], button.copy-btn {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border-radius: 4px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    font-size: 16px;
}
input[type="submit"], button.copy-btn {
    background-color:rgb(108, 201, 211);
    color: white;
    border: none;
    font-weight: bold;
}
button.copy-btn {
    background-color: rgb(108, 211, 168);
}
a {
    color: rgb(39, 123, 133);
    text-decoration: none;
}
a:hover {
    color: rgb(133, 39, 102);
}
.result, .verify-result {
    margin-top: 20px;
    word-break: break-word;
}
footer {
    font-size: 0.8em;
    color: rgba(0, 0, 0, 0.363);
    margin-top: 2em;
}