body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0;
    padding: 20px;
    background: #f5f5f5;
}

.container {
    max-width: 500px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

input[type="url"], input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

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

.result {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.result input {
    flex: 1;
}

.result button {
    width: auto;
    padding: 12px 20px;
    margin-top: 0;
}

.message {
    margin-top: 15px;
    padding: 10px;
    text-align: center;
    border-radius: 4px;
}

.message.success {
    background: #d4edda;
    color: #155724;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
}

.hidden {
    display: none;
}