:root{color:#172033;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;--surface:#fff;--surface-muted:#f7f9fc;--border:#d9e1ed;--text-muted:#667085;--accent:#1c7ed6;--accent-strong:#145ba6;--focus:#f08c00;--shadow:0 24px 80px #1720331f;background:#eef2f7;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans TC,Microsoft JhengHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,textarea{font:inherit}button{cursor:pointer;border:0}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,textarea:focus-visible{outline:3px solid color-mix(in srgb, var(--focus) 70%, white);outline-offset:2px}.app-shell{place-items:center;min-height:100vh;padding:40px 24px;display:grid}.translator{width:min(1120px,100%)}.app-header{justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px;display:flex}h1{color:#101828;letter-spacing:0;margin:0;font-size:clamp(2rem,5vw,4.2rem);line-height:1.02}.ghost-button,.swap-button,.icon-button{border:1px solid var(--border);color:#1f2937;background:var(--surface);justify-content:center;align-items:center;transition:border-color .16s,box-shadow .16s,color .16s,transform .16s;display:inline-flex}.ghost-button:hover,.swap-button:hover,.icon-button:hover{color:var(--accent-strong);border-color:#b4c7dc;transform:translateY(-1px);box-shadow:0 10px 24px #1c7ed61f}.ghost-button{border-radius:8px;min-width:78px;height:44px;padding:0 18px;font-size:.95rem;font-weight:700}.language-bar{grid-template-columns:minmax(0,1fr) 48px minmax(0,1fr);align-items:center;gap:12px;margin-bottom:14px;display:grid}.language-pill{border:1px solid var(--border);background:var(--surface);color:#1f2937;border-radius:8px;align-items:center;min-height:48px;padding:0 18px;font-size:1rem;font-weight:700;display:flex}.language-pill:last-child{color:var(--accent-strong)}.swap-button{width:48px;height:48px;color:var(--accent-strong);border-radius:999px}.panes{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:8px;grid-template-columns:repeat(2,minmax(0,1fr));display:grid;overflow:hidden}.text-pane{grid-template-rows:auto minmax(320px,44vh) auto;min-width:0;display:grid}.text-pane+.text-pane{border-left:1px solid var(--border)}.result-pane{background:var(--surface-muted)}.pane-toolbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;min-height:58px;padding:0 18px;display:flex}.pane-toolbar label{color:#1f2937;font-size:.98rem;font-weight:800}.icon-button{width:38px;height:38px;color:var(--text-muted);border-radius:8px}.swap-button svg,.icon-button svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}textarea{resize:none;color:#172033;letter-spacing:0;background:0 0;border:0;width:100%;min-width:0;height:100%;padding:22px 24px;font-size:clamp(1.25rem,2vw,1.85rem);line-height:1.55}textarea::placeholder{color:#98a2b3}.pane-meta{border-top:1px solid var(--border);min-height:44px;color:var(--text-muted);justify-content:flex-end;align-items:center;margin:0;padding:0 18px;font-size:.9rem;font-weight:600;display:flex}@media (width<=760px){.app-shell{align-items:stretch;padding:20px 14px}.app-header{align-items:start;margin-bottom:18px}h1{font-size:2.25rem}.language-bar{grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr);gap:8px}.language-pill{min-height:44px;padding:0 12px;font-size:.9rem}.swap-button{width:44px;height:44px}.panes{grid-template-columns:1fr}.text-pane{grid-template-rows:auto minmax(220px,32vh) auto}.text-pane+.text-pane{border-top:1px solid var(--border);border-left:0}textarea{padding:18px;font-size:1.2rem}}