:root{--page:#090b0b;--surface:#151919;--surface-raised:#1b2020;--field:#101414;--ink:#edf3f0;--muted:#9ba8a4;--border:#303a37;--border-strong:#53635e;--accent:#42af91;--accent-dark:#2c9276;--accent-soft:#1a3630;--signal:#e08c68;--danger:#f18474;--danger-soft:#3d2524;--amber:#e0aa50;--radius:8px}*{box-sizing:border-box}html{background:var(--page);min-width:320px}body{background:var(--page);min-height:100vh;color:var(--ink);margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}.app-shell{width:min(1600px,100% - 48px);margin:0 auto;padding:30px 0 40px}.topbar,.panel-heading,.actions,.notice-row{align-items:center;display:flex}.topbar{border-bottom:1px solid var(--border);justify-content:space-between;gap:24px;padding:0 0 22px}.panel-kicker{color:var(--accent);letter-spacing:0;margin:0 0 5px;font-size:11px;font-weight:700}h1,h2,h3,p{margin-top:0}h1{margin-bottom:0;font-size:28px;font-weight:700;line-height:1.15}h2{margin-bottom:0;font-size:17px;line-height:1.2}h3{margin-bottom:0;font-size:13px;line-height:1.2}.actions{flex-wrap:wrap;justify-content:flex-end;gap:10px}.button{border:1px solid #0000;border-radius:7px;justify-content:center;align-items:center;gap:7px;min-height:42px;padding:0 14px;font-size:14px;font-weight:700;transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s;display:inline-flex}.button.primary{border-color:var(--accent);background:var(--accent);color:#07110e;box-shadow:0 3px 10px #0000004d}.button.primary:hover:not(:disabled){background:var(--accent-dark);box-shadow:0 4px 12px 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var(--border);background:var(--surface-raised);justify-content:space-between;gap:16px;min-height:74px;padding:16px 18px}.panel-heading time,.format-badge{color:var(--muted);flex:none;font-size:12px}.format-badge{background:var(--accent-soft);color:var(--accent);border:1px solid #39685b;border-radius:4px;padding:4px 7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.source-panel{flex-direction:column;min-height:640px;display:flex}textarea{resize:vertical;background:var(--field);color:#d7e5e0;border:0;outline:none;flex:1;width:100%;min-height:0;padding:17px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:13px;line-height:1.75}textarea:focus{box-shadow:inset 0 0 0 2px #4d9d89}textarea::selection{color:#fff;background:#2c6e5e}textarea::-webkit-scrollbar{width:10px}textarea::-webkit-scrollbar-track{background:#101414}textarea::-webkit-scrollbar-thumb{background:#52655f;border:2px solid 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42px}.workspace{flex-direction:column;display:flex}.source-panel{min-height:360px}.panel-heading{padding:15px}.output-textarea{min-height:280px}}