.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
    position: relative;
    z-index: 1;
}

main {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.input-section {
    background: var(--surface);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    width: 400px;
    height: 400px;
}

.controls {
    background: var(--surface);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                0 2px 4px -1px rgba(0, 0, 0, 0.06);
    width: 400px;
    height: 400px;
    display: flex;
    flex-direction: column;
}

#upload-btn {
    display: inline-block;
}

@media (max-width: 850px) {
    main {
        flex-direction: column;
        align-items: center;
    }
    
    .input-section,
    .controls {
        width: 100%;
        max-width: 400px;
    }
}