body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #ffffff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 500px;
    width: 90%;
}

h1 {
    color: #2c3e50;
    margin-bottom: 20px;
}

p {
    line-height: 1.6;
    margin-bottom: 25px;
}

input[type="url"], input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-sizing: border-box;
    margin-bottom: 20px;
    font-size: 16px;
}

button, .login-button, .copy-button {
    background-color: #3498db;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s;
}

button:hover, .login-button:hover, .copy-button:hover {
    background-color: #2980b9;
}

.login-button {
    background-color: #4285F4;
}
.login-button:hover {
    background-color: #3367D6;
}

.copy-button {
    background-color: #27ae60;
}
.copy-button:hover {
    background-color: #229954;
}

.success {
    color: #27ae60;
    font-weight: bold;
}

.error {
    color: #c0392b;
    font-weight: bold;
}