.chat-shell{width:100%;height:100dvh;display:flex;overflow:hidden}.chat-rail{z-index:30;background:var(--panel);border-right:1px solid var(--line);flex-direction:column;flex:none;width:264px;display:flex;position:relative}.chat-main{z-index:10;background:var(--bg);flex-direction:column;flex:1;min-width:0;display:flex;position:relative}.chat-stream{flex:1;min-height:0;padding:32px 0 12px;overflow-y:auto}.chat-dock{background:linear-gradient(to top, var(--bg) 62%, transparent);flex:none;padding:8px 24px 22px}.composer-hint{text-align:center;color:var(--text-muted);margin-top:9px;font-size:11px}.chat-main[data-empty=true] .chat-stream{flex:none;padding:0}.chat-main[data-empty=true] .chat-dock{margin-top:auto;margin-bottom:auto;padding-bottom:7vh}.chat-greeting{text-align:center;font-size:var(--t-display);letter-spacing:-.6px;color:var(--text);margin:0 0 20px;font-weight:600}.turn-gutter{flex:none;width:30px;height:23.49px;position:relative}.gutter-layer{justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.chat-brand{border-bottom:1px solid var(--line-soft);flex:none;align-items:center;height:56px;padding:0 16px;display:flex}.day-label{font-size:var(--t-micro);font-weight:var(--t-micro-w);letter-spacing:var(--t-micro-track);text-transform:uppercase;color:var(--text-muted);padding:14px 10px 6px}.rail-link{border-radius:var(--r-md);color:var(--text-soft);transition:background var(--dur), color var(--dur);align-items:center;gap:9px;padding:8px 10px;font-size:13px;text-decoration:none;display:flex}.rail-link:hover{color:var(--text);background:#ecedec0f}.rail-scrim,.chat-burger{display:none}@media (max-width:900px){.chat-rail{box-shadow:var(--shadow-lg);transition:transform var(--dur) var(--ease);position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.chat-rail[data-open=true]{transform:translate(0)}.rail-scrim{z-index:20;cursor:pointer;background:#00000080;border:none;display:block;position:fixed;inset:0}.chat-burger{flex:none;justify-content:center;align-items:center;width:30px;height:30px;display:flex}}