body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
}

h1 {
    text-align: center;
    color: #007bff;
    margin-bottom: 20px;
}

.security-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

input:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

small {
    display: block;
    margin-top: 5px;
    color: #6c757d;
}

.radio-group label {
    display: inline-block;
    margin-right: 20px;
    font-weight: normal;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0056b3;
}

button:disabled {
    background-color: #a0c3e6;
    cursor: not-allowed;
}

#result-container, #error-container {
    margin-top: 30px;
    border-top: 1px solid #eee;
    padding-top: 20px;
}

.hidden {
    display: none;
}

h2 {
    font-size: 1.2em;
    color: #333;
}

#error-container h2 {
    color: #dc3545;
}

#error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 4px;
    word-break: break-all;
}

.result-box {
    display: flex;
    align-items: center;
}

textarea#result-link {
    flex-grow: 1;
    padding: 10px;
    font-family: 'Courier New', Courier, monospace;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
    background-color: #e9ecef;
}

#copy-btn {
    width: auto;
    padding: 10px 15px;
    margin-left: 10px;
    background-color: #28a745;
}
#copy-btn:hover {
    background-color: #218838;
}