.rv-container {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.rv-btn-upload {
    display: inline-block;
    background-color: #0073aa;
    color: #fff;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-bottom: 10px;
    transition: background-color 0.3s;
}

.rv-btn-upload:hover {
    background-color: #005177;
}

.rv-hint {
    font-size: 12px;
    color: #666;
    margin-top: 5px;
}

#rv-preview-container {
    margin: 15px 0;
}

#rv-preview-image {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.rv-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #0073aa;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 10px auto;
}

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

.rv-success {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #c3e6cb;
}

.rv-error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #f5c6cb;
}