.grt-booking-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.grt-booking-title {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.grt-form-row {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 15px;
    gap: 15px;
}

.grt-form-group {
    flex: 1;
    min-width: 200px;
}

.grt-form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.grt-form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.grt-form-actions {
    text-align: center;
    margin-top: 20px;
}

.grt-submit-btn {
    background-color: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.grt-submit-btn:hover {
    background-color: #005177;
}

.grt-submit-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.grt-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.grt-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    display: none;
    text-align: center;
}

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

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

@media (max-width: 480px) {
    .grt-form-row {
        flex-direction: column;
    }
}