* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    background-color: #f8f9fa;
    width: 400px;
    min-height: 300px;
}

.container {
    padding: 16px;
}

.header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e9ecef;
}

.logo {
    width: 32px;
    height: 32px;
}

h1 {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
}

h2 {
    font-size: 16px;
    font-weight: 600;
    color: #495057;
    margin-bottom: 12px;
}

.section {
    margin-bottom: 16px;
}

.section.hidden {
    display: none;
}

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #495057;
}

input[type="url"],
input[type="text"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.15s ease-in-out;
}

input[type="url"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

small {
    display: block;
    margin-top: 4px;
    color: #6c757d;
    font-size: 12px;
}

.btn {
    width: 100%;
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
}

.btn-primary {
    background-color: #4CAF50;
    color: white;
    margin-bottom: 8px;
}

.btn-primary:hover {
    background-color: #45a049;
}

.btn-primary:active {
    background-color: #3d8b40;
}

.btn-primary:disabled {
    background-color: #95c997;
    cursor: not-allowed;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.info-box {
    background-color: #e7f3ff;
    border: 1px solid #b3d9ff;
    border-radius: 4px;
    padding: 12px;
    margin-bottom: 16px;
}

.info-box p {
    margin-bottom: 4px;
}

.info-box strong {
    color: #0056b3;
}

.url-display {
    word-break: break-all;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    color: #495057;
}

#status-message {
    padding: 12px;
    border-radius: 4px;
    margin-top: 12px;
    font-size: 13px;
}

#status-message.success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

#status-message.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

#status-message.info {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

.loading {
    position: relative;
}

.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -8px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}