:root{--bg:#f6f7f9;--panel:#fff;--side:#eef0f4;--text:#1e2430;--muted:#6b7280;--border:#d9dde5;--accent:#2563eb;--accent-text:#fff;--user:#dbeafe;--bot:#fff;--code:#f1f3f7;--ok:#16a34a;--warn:#d97706;--bad:#dc2626}
@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--panel:#171b23;--side:#12161d;--text:#e6e9ef;--muted:#98a2b3;--border:#2a3140;--accent:#3b82f6;--user:#1e3a8a;--bot:#171b23;--code:#0f1218}}
*{box-sizing:border-box}html,body{height:100%;margin:0}
[hidden]{display:none !important}
body{font:14px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent)}button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:6px;padding:6px 10px}
button.primary{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}button:disabled{opacity:.5;cursor:default}
#app{display:flex;height:100%}
#sidebar{width:260px;flex:0 0 260px;background:var(--side);border-right:1px solid var(--border);display:flex;flex-direction:column}
#sidebar.hidden{display:none}
.side-top{display:flex;gap:6px;padding:10px}.side-top .primary{flex:1}
#sessions{list-style:none;margin:0;padding:0 6px;overflow-y:auto;flex:1}
#sessions li{display:flex;align-items:center;gap:4px;padding:6px 8px;border-radius:6px;cursor:pointer;white-space:nowrap;overflow:hidden}
#sessions li:hover{background:var(--panel)}#sessions li.active{background:var(--panel);font-weight:600}
#sessions li span{flex:1;overflow:hidden;text-overflow:ellipsis}#sessions li button{padding:0 6px;border:none;background:none;color:var(--muted)}
.side-bottom{padding:10px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:12px}
#main{flex:1;display:flex;flex-direction:column;min-width:0}
header{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--panel)}
header h1{font-size:16px;margin:0;flex:1}.controls{display:flex;gap:12px;font-size:13px;color:var(--muted)}.controls select{margin-left:4px}
.notice{margin:8px 16px 0;padding:8px 12px;border:1px solid var(--border);border-radius:6px;background:var(--panel);font-size:13px}
#messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:14px}
.msg{max-width:900px;width:100%;align-self:center}
.bubble{padding:10px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bot);overflow-wrap:anywhere}
.msg.user .bubble{background:var(--user);white-space:pre-wrap}
.msg.assistant .bubble p:first-child{margin-top:0}.msg.assistant .bubble p:last-child{margin-bottom:0}
.bubble pre{background:var(--code);padding:8px 10px;border-radius:6px;overflow-x:auto;font-size:12.5px}
.bubble code{background:var(--code);padding:1px 4px;border-radius:4px;font-size:12.5px}.bubble pre code{padding:0;background:none}
.status{color:var(--muted);font-size:12.5px;font-style:italic}
#sources-panel{width:360px;flex:0 0 360px;border-left:1px solid var(--border);background:var(--side);display:flex;flex-direction:column;min-width:0}
#sources-panel.hidden{display:none}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--border);font-weight:600}
#sources-body{overflow-y:auto;padding:6px 12px 12px;font-size:13px;flex:1}
.src-link{font-size:12px;color:var(--muted);margin-top:4px;cursor:pointer}.src-link:hover{color:var(--accent)}
.msg.assistant.selected .bubble{border-color:var(--accent)}
.tk{display:grid;grid-template-columns:1fr;gap:2px;padding:8px 0;border-top:1px solid var(--border)}
.tk:first-child{border-top:none}.tk .key{grid-row:1}.tk .title{grid-row:2}.tk .key{font-weight:600;white-space:nowrap}.tk .title{overflow-wrap:anywhere}
.tk .snip{color:var(--muted);font-size:12px;white-space:pre-wrap;max-height:3.2em;overflow:hidden;cursor:pointer}
.tk .snip.open{max-height:none}.tk .meta{font-size:12px;color:var(--muted)}
.badge{display:inline-block;padding:0 6px;border-radius:10px;font-size:11px;border:1px solid var(--border);color:var(--muted);margin-left:6px}
.badge.done{color:var(--ok)}.badge.open{color:var(--warn)}.badge.pin{color:var(--accent)}
.crash{padding:8px 10px;border-left:3px solid var(--warn);background:var(--panel);margin-bottom:6px}
.crash.known{border-color:var(--ok)}.crash.unseen{border-color:var(--bad)}.crash.candidates{border-color:var(--warn)}
.feedback{margin-top:6px;display:flex;gap:6px;font-size:12px;color:var(--muted);align-items:center}
.feedback button{padding:1px 7px}.feedback button.sel{border-color:var(--accent);color:var(--accent)}
footer{padding:10px 16px 14px;border-top:1px solid var(--border);background:var(--panel)}
#composer{display:flex;gap:8px;max-width:900px;margin:0 auto;align-items:flex-end}
#input{flex:1;resize:none;max-height:40vh;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font:inherit}
.muted{color:var(--muted)}.error{color:var(--bad);min-height:1em}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;padding:20px}
.modal-card{background:var(--panel);border-radius:10px;max-width:960px;width:100%;max-height:90vh;overflow:auto;padding:18px 22px;position:relative}
.modal .close{position:absolute;top:8px;right:8px;border:none;background:none;font-size:20px}
.modal h2{margin-top:0}.modal .cm{border-top:1px solid var(--border);padding:8px 0}.modal .cm .who{font-size:12px;color:var(--muted)}
.modal pre.raw{white-space:pre-wrap;background:var(--code);padding:8px;border-radius:6px;font-size:12.5px}
.login-body{display:flex;align-items:center;justify-content:center;height:100%}
.login-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:24px;width:340px;display:flex;flex-direction:column;gap:10px}
.login-card input{width:100%;padding:8px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text)}
@media (max-width:1100px){#sources-panel{width:300px;flex-basis:300px}}
@media (max-width:800px){#sidebar,#sources-panel{position:absolute;z-index:5;height:100%}#sources-panel{right:0}}