:root{font-family:Inter,system-ui,-apple-system,sans-serif;color:#111827;background-color:#f9fafb}body{margin:0}main{max-width:640px;margin:48px auto;padding:24px;background:#fff;border-radius:12px;box-shadow:0 8px 24px #00000014}.upload-button{display:inline-block;padding:10px 16px;border-radius:8px;background:#2563eb;color:#fff;font-weight:600;cursor:pointer}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.drop-zone{margin-top:16px;padding:28px;border:2px dashed #93c5fd;border-radius:12px;text-align:center;background:#eff6ff;color:#1e3a8a}.drop-zone.is-dragover{border-color:#2563eb;background:#dbeafe}.status{margin-top:16px;font-weight:600}.controls{margin-top:12px}.download-button{margin-top:16px;border:none;border-radius:8px;background:#0f766e;color:#fff;font-weight:700;padding:10px 16px;cursor:pointer}.download-button:disabled{background:#94a3b8;cursor:not-allowed}.toggle-control{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:#1f2937}.adjustment-control{display:grid;margin-top:10px;gap:4px;font-size:.875rem;color:#374151}.adjustment-control input[type=range]{width:100%}.preview{margin-top:16px}.preview-heading{margin:0 0 8px;font-size:1rem}.preview-image{display:block;max-width:100%;max-height:320px;border-radius:8px;border:1px solid #d1d5db;background:#f3f4f6}.preview-image-pixel{image-rendering:pixelated;image-rendering:crisp-edges}.preview-meta{margin:8px 0 0;color:#4b5563;font-size:.875rem}.preset-section{margin-bottom:12px}.preset-heading{margin:0 0 8px;font-weight:700;color:#111827}.preset-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.preset-button{border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:#1f2937;padding:8px 10px;font-size:.8rem;font-weight:600;cursor:pointer}.preset-button.is-active{border-color:#2563eb;background:#dbeafe;color:#1e3a8a}