:root{color:#15181d;background:#f7f8fa;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,textarea{font:inherit}.app-shell{width:min(1180px,calc(100% - 40px));min-height:100vh;margin:0 auto;padding:48px 0 28px}.app-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding-bottom:30px;border-bottom:1px solid #dde2ea}.eyebrow,.pane-kicker{margin:0 0 8px;color:#2563eb;font-size:.76rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}h1,h2,p{margin:0}h1{font-size:clamp(2.4rem,4vw,4.1rem);line-height:1}h2{font-size:1.25rem;line-height:1.25}.lead{max-width:520px;margin-top:14px;color:#5c6573;font-size:1rem;line-height:1.7}.status-pill{display:inline-flex;align-items:center;gap:9px;min-height:38px;padding:0 14px;border:1px solid #d7dde6;border-radius:8px;background:#fff;color:#303743;font-size:.9rem;white-space:nowrap}.status-dot{width:8px;height:8px;border-radius:999px;background:#9aa4b2}.status-dot--ready{background:#2563eb}.status-dot--converting{background:#d97706}.status-dot--failed{background:#dc2626}.converter-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1px;margin-top:28px;overflow:hidden;border:1px solid #d7dde6;border-radius:8px;background:#d7dde6}.pane{display:flex;min-height:560px;flex-direction:column;gap:18px;padding:24px;background:#fff}.pane-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.counter{color:#6b7280;font-size:.88rem;white-space:nowrap}.text-area,.result-box{width:100%;min-height:390px;flex:1;padding:18px;border:1px solid #d7dde6;border-radius:8px;background:#fbfcfe;color:#171a20;font-size:1.08rem;line-height:1.8}.text-area{resize:none}.text-area:focus{border-color:#2563eb;outline:3px solid rgba(37,99,235,.16)}.result-box{display:block;overflow:auto;white-space:pre-wrap}.actions{display:flex;align-items:center;gap:10px}.actions--right{justify-content:flex-end}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 14px;border:1px solid transparent;border-radius:8px;cursor:pointer;font-weight:700}.button:disabled{cursor:not-allowed;opacity:.5}.button--primary{background:#1d4ed8;color:#fff}.button--secondary{border-color:#cbd5e1;background:#fff;color:#1f2937}.button--ghost{background:transparent;color:#4b5563}.copy-state{min-width:136px;color:#2563eb;font-size:.9rem;text-align:right}.app-footer{margin-top:18px;color:#687284;font-size:.9rem}@media (max-width: 760px){.app-shell{width:min(100% - 24px,1180px);padding-top:28px}.app-header{flex-direction:column}.converter-grid{grid-template-columns:1fr}.pane{min-height:420px;padding:18px}.text-area,.result-box{min-height:260px}.actions,.actions--right{align-items:stretch;flex-direction:column}.button,.copy-state{width:100%}}