body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f7f9;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}
.container {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    text-align: center;
}
h1 {
    color: #1a1a1a;
    margin-bottom: 0.5rem;
}
p {
    color: #666;
    margin-bottom: 1.5rem;
}
textarea {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 1rem;
    margin-bottom: 1rem;
    box-sizing: border-box;
    resize: vertical;
}
button {
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: 8px;
    background-color: #007bff;
    color: white;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}
button:hover {
    background-color: #0056b3;
}
button:disabled {
    background-color: #a0c7e4;
    cursor: not-allowed;
}
.spinner-container {
    margin-top: 1.5rem;
}
.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #007bff;
    animation: spin 1s ease infinite;
    margin: 0 auto 1rem;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
#result-container {
    margin-top: 2rem;
}
#result-image {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}
.error {
    color: #d9534f;
    background-color: #f2dede;
    border: 1px solid #ebccd1;
    padding: 1rem;
    border-radius: 8px;
}