:root{color:#172026;background:#f4f7f7;font-family:Inter,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{color:#172026;cursor:pointer;background:#fff;border:1px solid #cfdadc;border-radius:8px;justify-content:center;align-items:center;gap:8px;min-height:38px;padding:9px 13px;display:inline-flex}button:hover{border-color:#0f8b8d}button:disabled{cursor:not-allowed;opacity:.55}.primary{color:#fff;background:#0f8b8d;border-color:#0f8b8d}.big{width:100%;min-height:48px}.app-layout{grid-template-columns:270px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{background:#fff;border-right:1px solid #dce5e7;flex-direction:column;gap:12px;height:100vh;padding:12px;display:flex;position:sticky;top:0;left:0;overflow:hidden}.sidebar-head{justify-content:space-between;align-items:center;display:flex}.new-chat{color:#fff;background:#0f8b8d;border-color:#0f8b8d;width:100%}.history-list{gap:6px;padding-right:2px;display:grid;overflow:auto}.history-item{text-align:left;justify-content:stretch;align-items:flex-start;gap:4px;width:100%;min-height:52px;padding:8px 9px;display:grid}.history-item.active{border-color:#0f8b8d;box-shadow:0 0 0 2px #0f8b8d1f}.history-item span{font-size:13px;font-weight:700;line-height:1.35}.history-item small{color:#64737d;font-size:11px;line-height:1.35}.chat-main{flex-direction:column;min-width:0;padding:18px 34px;display:flex}.chat-header{background:#fff;border:1px solid #dce5e7;border-radius:8px;justify-content:space-between;align-items:center;gap:18px;width:100%;max-width:1080px;margin:0 auto;padding:16px;display:flex}.chat-header h1{margin:2px 0 4px;font-size:25px;line-height:1.2}.chat-header p{color:#64737d;margin:0}.eyebrow{color:#0f8b8d;letter-spacing:0;text-transform:uppercase;font-size:12px;font-weight:800}.header-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.pill{border-radius:8px;padding:8px 10px;font-size:13px}.pill.ok{color:#176c45;background:#e6f5ef}.pill.warn,.notice{color:#7a4f00;background:#fff4d8}.download-row{gap:10px;width:100%;max-width:920px;min-height:34px;margin:0 auto;padding:10px 2px 0;display:flex}.download-link{color:#0f8b8d;font-weight:800;text-decoration:none}.chat-panel{background:#fff;border:1px solid #dce5e7;border-radius:8px;flex:1;grid-template-rows:minmax(420px,1fr) auto;width:100%;max-width:1080px;min-height:0;margin:0 auto;display:grid}.messages{flex-direction:column;gap:12px;padding:16px;display:flex;overflow:auto}.message{gap:6px;max-width:min(820px,88%);display:grid}.message span{color:#64737d;font-size:12px;font-weight:700}.message pre{white-space:pre-wrap;border-radius:8px;margin:0;padding:12px;font-size:14px;line-height:1.6;overflow-x:auto}.message.assistant{align-self:flex-start}.message.assistant pre{background:#eef5f5}.message.user{align-self:flex-end}.message.user span{text-align:right}.message.user pre{color:#fff;background:#0f8b8d}.composer{border-top:1px solid #dce5e7;max-width:920px;padding:14px}.input-card{gap:12px;display:grid}.ready-card{background:#f5f8f8;border:1px solid #dce5e7;border-radius:8px;padding:14px}.ready-card p{color:#64737d;margin:4px 0 8px}.export-actions{flex-wrap:wrap;gap:10px;display:flex}label{color:#46545f;gap:6px;font-size:13px;display:grid}input,select,textarea{color:#172026;background:#fbfcfc;border:1px solid #cfdadc;border-radius:8px;width:100%;min-width:0;padding:10px 11px}textarea{resize:vertical;min-height:110px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.status-line{color:#64737d;margin:10px 0 0;font-size:13px}.icon-only{min-height:34px;padding:7px}.mobile-only{display:none}@media (width<=820px){.app-layout{grid-template-columns:1fr}.sidebar{z-index:10;width:280px;transition:transform .2s;position:fixed;top:0;bottom:0;left:0;transform:translate(-105%)}.sidebar.open{transform:translate(0)}.mobile-only{display:inline-flex}.chat-main{padding:10px}.chat-header{flex-direction:column;align-items:flex-start}.grid-2{grid-template-columns:1fr}}