/* Conversation layout, rebuilt around a unified navigation and white conversation canvas. */
:root{--rail-w:256px;--rail-extra:clamp(0px,calc((100vw - var(--rail-w) - 760px) / 2 - 30px),calc(var(--rail-w) * .2))}html,body{height:100%;overflow:hidden}
.shell{height:100dvh;display:flex;min-width:0;padding-left:0;background:var(--bg)}
.stage{flex:1;min-width:0;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:72px minmax(0,1fr) auto;position:relative;background:#fff}
.rail{width:var(--rail-w);flex:0 0 var(--rail-w);min-height:0;display:flex;flex-direction:column;background:var(--surface-2);border-right:1px solid var(--line);padding:24px 14px 18px;transition:margin-left .22s ease}
.shell.rail-collapsed .rail{margin-left:calc(-1 * var(--rail-w))}
.rail-brand{display:block;padding:0 10px 20px;text-decoration:none;color:var(--ink)}.rail-brand strong{display:block;font-size:18px;font-weight:650}.rail-brand small{font-size:12px;color:var(--ink-3)}
.rail-start{display:flex;gap:10px;align-items:center;min-height:44px;padding:10px 14px;border:0;border-radius:8px;background:var(--accent);color:var(--accent-on);text-align:left;font-size:13px;font-weight:600;margin:0 0 20px}.rail-start:hover{background:var(--accent-ink)}
.rail__head{display:flex;gap:4px;align-items:center;margin-bottom:10px}.rail__tabs{display:flex;flex:1;gap:2px;padding:3px;background:var(--surface-3);border-radius:8px}
.tab{flex:1;display:flex;justify-content:center;align-items:center;gap:6px;padding:6px 10px;min-height:36px;border:0;background:none;color:var(--ink-2);border-radius:6px;font-size:12px}.tab .icon{width:15px;height:15px}.tab.is-active{background:white;color:var(--accent);box-shadow:0 1px 3px #17314110}.rail__head>.icon-btn{width:32px;height:38px}
.rail__body{overflow-y:auto;flex:1;min-height:0;scrollbar-width:thin;overscroll-behavior:contain}.rail__panel{display:flex;flex-direction:column;gap:14px}.hist__head{display:flex;align-items:center;padding:12px 10px 5px}.block__title{display:flex;gap:8px;align-items:center;font-size:12px;font-weight:500;color:var(--ink-3);margin:0}.block__count{font-size:11px;color:var(--ink-3)}
.convlist,.memlist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:3px}.conv{position:relative;display:flex;border-radius:8px}.conv:hover{background:var(--surface-3)}.conv.is-active{background:var(--accent-soft)}.conv__main{display:flex;flex:1;flex-direction:column;gap:3px;min-width:0;text-align:left;border:0;background:none;padding:12px 34px 12px 11px;color:var(--ink);border-radius:8px}.conv__title{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;font-weight:500}.conv__meta{font-size:11px;color:var(--ink-3)}.conv__del{position:absolute;right:3px;top:50%;transform:translateY(-50%);width:32px;height:38px;border:0;border-radius:6px;background:none;color:var(--ink-3);display:grid;place-items:center}.conv__del .icon{width:15px;height:15px}.conv__del:hover{background:#fff;color:var(--danger)}
.rail__utilities{position:static;width:auto;display:flex;flex-direction:column;padding:14px 0 0;color:var(--ink-2);border-top:1px solid var(--line);margin-top:16px;flex:none}
.product-logo{display:none}.rail__nav{display:grid;grid-template-columns:1fr 1fr;gap:3px}.rail__nav-item{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px;color:var(--ink-2);border-radius:7px;font-size:12px;white-space:nowrap}.rail__nav-item:visited{color:var(--ink-2)}.rail__nav-item:hover{background:var(--surface-3);color:var(--ink)}.rail__nav-item>.icon{width:17px;height:17px}.rail__nav-chevron{display:none}.rail__foot{margin:12px 8px 0;color:var(--ink-3);font-size:10px;line-height:1.8}.rail-brand strong{font-size:20px;letter-spacing:-.03em}.rail-brand strong::before{content:"";display:inline-block;vertical-align:-2px;width:8px;height:20px;border-radius:3px;background:var(--accent);margin-right:10px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 28px;border-bottom:1px solid var(--line-soft);background:#fff;position:relative}.topbar__left{display:flex;align-items:center;gap:12px;min-width:0}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand__mark{display:none}.brand__text{display:flex;flex-direction:column;min-width:0}.brand__name{font-size:14px;font-weight:600}.brand__status{font-size:11px;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.brand__status.is-online{color:var(--ok)}.topbar__actions{display:flex;align-items:center;gap:4px}.conv-chip{display:flex;gap:8px;align-items:center;min-width:0;max-width:30%;color:var(--ink-3);font-size:12px}.conv-chip__text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-chip .icon{width:15px;height:15px}
.pick{position:relative}.pick__btn{display:flex;align-items:center;gap:7px;max-width:180px;min-height:38px;border:0;border-radius:8px;padding:6px 10px;background:var(--surface-2);color:var(--ink);font-size:13px}.pick__name{min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.pick__caret{width:14px;height:14px;color:var(--ink-3)}.pick__btn>.icon{width:17px;height:17px}
.pmenu{position:absolute;z-index:40;top:calc(100% + 8px);right:0;min-width:220px;max-height:360px;overflow:auto;background:#fff;padding:7px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-2)}.pmenu__item{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px;width:100%;border:0;border-radius:7px;background:none;color:var(--ink-2);padding:8px 10px;font-size:13px;text-align:left;cursor:pointer}.pmenu__item:hover,.pmenu__item.is-active{background:var(--accent-soft);color:var(--accent-ink)}.pmenu__text{min-width:0;flex:1}.pmenu__name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pmenu__kind{font-size:11px;color:var(--ink-3);padding:2px 6px;background:var(--surface-2);border-radius:4px}
.thread{min-height:0;overflow-y:auto;overscroll-behavior:contain;display:flex;flex-direction:column;gap:24px;padding:32px max(28px,calc((100% - 760px)/2)) 24px;scrollbar-width:thin;scroll-padding:24px}.welcome{margin:auto;max-width:620px;width:100%;padding:30px 0 60px;text-align:left;position:relative}.welcome__mark{display:grid;place-items:center;width:88px;height:88px;border-radius:20px;background:var(--accent-soft);color:var(--accent);margin:0 0 32px;box-shadow:none}.welcome__mark .icon{width:40px;height:40px}.welcome__title{font-size:clamp(30px,3.6vw,40px);font-weight:650;line-height:1.25;letter-spacing:-.06em;margin:0 0 18px}.welcome__sub{color:var(--ink-2);font-size:15px;line-height:1.9;max-width:390px;margin-bottom:32px}.welcome__chips{display:flex;flex-wrap:wrap;gap:8px}.chip{min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink-2);font-size:12px}.chip:hover{border-color:var(--accent);background:var(--accent-soft)}
.msg{display:flex;align-items:flex-start;gap:12px;width:100%;max-width:760px;min-width:0;margin:0 auto}.msg--me{flex-direction:row-reverse}.msg__avatar{width:30px;height:30px;flex:none;display:grid;place-items:center;background:var(--accent);color:var(--accent-on);border-radius:9px;font-size:12px;font-weight:600}.msg--me .msg__avatar{display:none}.msg__body{flex:1;min-width:0}.msg__bubbles{display:flex;flex-direction:column;align-items:flex-start;gap:8px;min-width:0}.msg__bubbles>.bubble{max-width:100%;white-space:pre-wrap}.msg--me .msg__bubbles{align-items:flex-end}.msg__meta{font-size:11px;margin-bottom:6px}.bubble{border-radius:12px;background:var(--surface-2);box-shadow:none;padding:12px 16px;font-size:15px;line-height:1.85;overflow-wrap:anywhere}.msg--me .bubble{background:var(--accent-soft)}.msg__name{color:var(--ink-2)}.trace,.msg__activity{font-size:11px;color:var(--ink-3)}.bubble--error{color:#9c253c;background:#fff0f2}
.compose-row{display:flex;align-items:stretch;gap:8px;width:calc(100% - 56px);max-width:860px;min-width:0;margin:0 auto 24px}.composer{flex:1;min-width:0;display:flex;flex-wrap:wrap;align-items:flex-end;gap:6px;padding:9px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 3px 12px #17304306}.composer:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.composer textarea{flex:1;min-width:0;max-height:168px;line-height:1.65;font-size:14px;padding:10px 0;resize:none;border:0;outline:none;background:transparent;color:var(--ink)}.composer textarea::placeholder{color:var(--ink-3)}.composer__tools{display:flex;gap:2px;align-items:center}.composer__attach{width:40px;height:44px}.send{width:44px;height:44px;display:grid;place-items:center;border:0;border-radius:9px;background:var(--accent);color:var(--accent-on);flex:none}.send:disabled{opacity:.3}.send__pick{display:none}.composer.is-composing .send .icon{display:none}.composer.is-composing .send__pick{display:block;font-size:11px}.pick--model{flex:0 0 160px}.pick--model .pick__btn{width:100%;height:100%;max-width:none;min-height:64px;padding:10px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.model-text{display:flex;flex-direction:column;align-items:flex-start;gap:3px;min-width:0}.model-setting{font-size:11px;white-space:nowrap;color:var(--ink-3)}.pick--model .pmenu{top:auto;bottom:calc(100% + 10px);width:250px;min-width:0;max-height:min(540px,calc(100dvh - 140px));border-radius:14px}
.attachbar{flex:0 0 100%;display:flex;gap:8px;overflow:auto;max-width:100%}.att{display:flex;align-items:center;gap:8px;background:var(--surface-2);border-radius:8px;padding:8px;max-width:230px;min-width:0}.att__icon,.att__thumb{width:34px;height:34px;object-fit:cover;flex:none}.att__body,.att__text{min-width:0}.att__name{font-size:12px;max-width:140px;overflow:hidden;white-space:nowrap;display:block}.att__sub{font-size:11px;color:var(--ink-3)}.att__del{width:32px;height:36px;border:0;display:grid;place-items:center;background:none;color:var(--ink-2);flex:none}.att__del .icon{width:15px;height:15px}.msg__atts{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.msg--me .msg__atts{justify-content:flex-end}.msg__img{max-width:min(240px,100%);max-height:280px;border-radius:10px}.msg__file{display:flex;gap:10px;align-items:center;max-width:100%;padding:10px;background:var(--surface-2);border-radius:8px;color:var(--ink)}.msg__file-tx{min-width:0}.msg__file-name{display:block;overflow:hidden;white-space:nowrap;max-width:220px}.msg__file-size{font-size:11px;color:var(--ink-3)}.msg__file-ic{flex:none}
.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.stat{padding:12px;background:white;border-radius:8px}.stat__n{font-size:20px;font-weight:600}.stat__l{font-size:11px;color:var(--ink-3)}.block{display:flex;flex-direction:column;gap:10px}.tiers{display:flex;flex-direction:column;gap:8px}.tier{font-size:12px;padding:8px;background:#fff;border-radius:6px}.tier__head{display:flex;justify-content:space-between}.tier__track{height:4px;border-radius:4px;background:var(--surface-3);overflow:hidden}.tier__fill{height:100%;background:var(--accent)}.mem{padding:12px;background:white;border-radius:8px;font-size:12px;overflow-wrap:anywhere}.mem__body{line-height:1.7}.mem__meta{display:flex;flex-wrap:wrap;gap:6px;font-size:11px;color:var(--ink-3)}.tag{padding:1px 5px;background:var(--surface-2);border-radius:3px;font-size:10px}.state{font-size:12px}.state__item{display:flex;gap:8px;padding:8px 0;border-bottom:1px solid var(--line)}.state__k{color:var(--ink-3)}.state__v{min-width:0;overflow-wrap:anywhere}.empty,.memempty{font-size:12px;color:var(--ink-3);padding:12px}.mini-btn{border:0;background:var(--accent-soft);color:var(--accent);display:flex;gap:6px;align-items:center;padding:8px 12px;border-radius:7px;font-size:12px}.jump{bottom:110px;border-radius:8px;min-height:40px}.rail-overlay{display:none}
@media(max-height:780px) and (min-width:1081px){.rail__foot{display:none}.rail{padding-top:18px}.rail-brand{padding-bottom:14px}.rail-start{margin-bottom:12px}}
@media(max-width:1080px){.shell{padding-left:0}.rail{position:fixed;inset:0 auto 0 0;width:min(340px,90vw);transform:translateX(-100%);z-index:60;transition:transform .22s ease;padding-top:max(20px,env(safe-area-inset-top))}.rail.is-open{transform:none}.shell.rail-collapsed .rail{margin-left:0}.rail-overlay:not([hidden]){display:block;position:fixed;inset:0;z-index:59;background:#24242670;border:0}.rail__utilities{position:static;width:auto;display:block;padding:12px 0 0;background:none;border-top:1px solid var(--line);margin-top:12px;max-height:40vh;overflow:auto}.product-logo,.rail__foot{display:none}.rail__nav{display:grid;grid-template-columns:1fr 1fr;gap:4px}.rail__nav-item,.rail__nav-item:visited{color:var(--ink-2);min-height:44px;flex-direction:row;justify-content:flex-start;padding:10px 8px;font-size:12px;gap:8px}.rail__nav-item:hover{background:var(--surface-3);color:var(--ink)}.rail__nav-item>.icon{width:17px;height:17px}.rail__head>.icon-btn{width:44px;height:44px}.thread{padding:26px max(20px,calc((100% - 760px)/2))}.compose-row{width:calc(100% - 40px);margin-bottom:20px}}
@media(max-width:600px){.stage{grid-template-rows:64px minmax(0,1fr) auto}.topbar{padding:10px 12px;gap:5px}.topbar__left{gap:3px}.topbar__actions{gap:0}.conv-chip{display:none}.brand__status{max-width:95px;font-size:10px}.topbar .pick__btn{max-width:112px;font-size:12px;padding:6px}.topbar .pick__btn>.icon{display:none}.icon-btn{width:40px;height:44px}.welcome{padding:30px 4px 50px}.welcome__mark{width:66px;height:66px;border-radius:20px 20px 20px 4px;margin-bottom:26px}.welcome__mark .icon{width:32px;height:32px}.welcome__title{font-size:30px}.welcome__sub{font-size:14px;max-width:270px}.welcome__chips{gap:6px}.chip{font-size:11px;padding:8px 10px}.thread{padding:22px 16px;gap:22px}.msg{gap:8px}.msg__avatar{width:26px;height:26px}.bubble{font-size:14px;padding:10px 13px}.compose-row{width:calc(100% - 24px);gap:6px;margin-bottom:max(12px,env(safe-area-inset-bottom))}.composer{padding:6px;gap:2px;border-radius:12px}.composer__attach{width:30px}.composer textarea{font-size:14px;padding:10px 0}.send{width:36px;height:44px}.pick--model{flex-basis:100px}.pick--model .pick__btn{padding:7px;gap:3px;border-radius:12px;min-height:60px}.pick--model .pick__btn>.icon{display:none}.pick--model .pick__name{font-size:11px}.model-setting{font-size:10px}.pick--model .pmenu{max-width:calc(100vw - 24px)}#btn-mic{display:none}.jump{bottom:92px}}
@media(max-width:420px){#home-link,#tick-proactive{display:none}}

.stat{display:flex;flex-direction:column;gap:2px}.tier{display:flex;align-items:center;gap:8px}.tier__name{min-width:62px}.tier__track{display:block;flex:1;height:4px}.tier__fill{display:block}.mem__body{margin:0 0 8px}.conv__del::before{content:"";position:absolute;inset:-3px -2px}

/* Sidebar feedback for mouse and keyboard; touch does not retain hover. */
.rail__nav-item,.conv{transition:background-color 200ms ease,color 160ms ease}
.rail__nav-item:focus-visible,.conv:focus-within{background:#e8e6e3}
@media(hover:hover) and (pointer:fine){.rail__nav-item:hover,.conv:hover,.conv.is-active:hover{background:#e8e6e3}.conv.is-active:hover .conv__main{color:var(--accent-ink)}}
@media(hover:none),(pointer:coarse){.rail__nav-item:hover,.conv:not(.is-active):hover{background:transparent}.conv.is-active:hover{background:var(--accent-soft)}}
@media(prefers-reduced-motion:reduce){.rail__nav-item,.conv{transition:none}}

/* Keyboard focus wins over sticky touch hover. */
.rail__nav-item:focus-visible,.rail__nav-item:hover:focus-visible,.conv:not(.is-active):focus-within,.conv.is-active:focus-within{background:#e8e6e3}

/* Bound portrait to the chat avatar; the original asset is high resolution. */
.msg__avatar{overflow:hidden}.msg__avatar > .instance-avatar-img{display:block;width:100%;height:100%;min-width:0;min-height:0;max-width:100%;max-height:100%;object-fit:cover;border-radius:inherit}

/* Enlarge the official character outward, without changing the chat row geometry. */
.msg__avatar--sisi{transform:scale(1.75);transform-origin:right top}
@media(max-width:600px){.msg__avatar--sisi{transform:translateX(4px) scale(1.75)}}

/* Expand the desktop sidebar over the canvas without reflowing chat. */
@media(min-width:1081px){
 html:not([data-workspace-panel]) body[data-workspace="chat"] .shell:not(.rail-collapsed) > .rail{
  width:calc(var(--rail-w) + var(--rail-extra));flex-basis:calc(var(--rail-w) + var(--rail-extra));
  margin-right:calc(-1 * var(--rail-extra));position:relative;z-index:31;
 }
 html:not([data-workspace-panel]) body[data-workspace="chat"]:not(.route-away) .shell:not(.rail-collapsed) .topbar__left{position:relative;z-index:32;transform:translateX(var(--rail-extra))}
}
/* Drawers retain space for the scrim and closing gesture on small screens. */
@media(max-width:1080px){html:not([data-workspace-panel]) body[data-workspace="chat"] .rail{width:min(408px,90vw)}}
html[data-workspace-panel] body[data-workspace="chat"] .rail{width:min(408px,90vw)}

@media(min-width:1081px){body[data-workspace="chat"] .topbar__left{transition:transform .22s ease}}
@media(prefers-reduced-motion:reduce){body[data-workspace="chat"] .topbar__left{transition:none}}

/* Keep mobile chat at device width while the keyboard changes the visible height. */
@media(max-width:1080px){
 :root{--chat-header-height:72px}
 body[data-workspace="chat"]{width:100%;touch-action:manipulation;overscroll-behavior:none}
 body[data-workspace="chat"]>.shell{position:fixed;inset:var(--chat-viewport-top,0px) 0 auto;width:100%;height:var(--chat-viewport-height,100dvh)}
 body[data-workspace="chat"] .composer textarea{max-height:min(168px,calc(var(--chat-viewport-height,100dvh) * .28))}
 html body[data-workspace="chat"]>.workspace-portal{top:calc(var(--chat-viewport-top,0px) + var(--chat-header-height));bottom:auto;height:calc(var(--chat-viewport-height,100dvh) - var(--chat-header-height))}
}
@media(max-width:600px){:root{--chat-header-height:64px}}