:root{color-scheme:light dark;--bg:#fff;--fg:#111;--muted:#8a8a8e;--line:#0000001a;--me:#111;--me-fg:#fff;
  --them:#f0f0f2;--accent:#111;--code:#0000000d;--sys:#0000000a}
@media(prefers-color-scheme:dark){:root{--bg:#000;--fg:#f2f2f2;--muted:#8d8d93;--line:#ffffff1f;--me:#f2f2f2;
  --me-fg:#000;--them:#1c1c1e;--accent:#f2f2f2;--code:#ffffff14;--sys:#ffffff0d}}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg)}
body{font:16px/1.45 -apple-system,system-ui,sans-serif;-webkit-text-size-adjust:100%;overscroll-behavior:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
[hidden]{display:none!important}
a{color:inherit;text-decoration:underline;text-underline-offset:2px}
h1{font-size:17px;margin:0;font-weight:650}
.muted{color:var(--muted)}
.grow{flex:1}

.screen{position:fixed;inset:0;display:flex;flex-direction:column;background:var(--bg)}
.center{align-items:center;justify-content:center;text-align:center;padding:24px;gap:12px}
.center h1{font-size:24px}
.overlay{z-index:10}
.primary{background:var(--accent);color:var(--bg);padding:13px 28px;border-radius:14px;font-weight:600;min-width:200px}
.primary:disabled{opacity:.5}
.link{color:var(--muted);text-decoration:underline;margin-top:10px}
.logo{width:72px;height:72px;border-radius:18px;background:var(--fg) url(/static/icon-192.png) center/cover}

.bar{display:flex;align-items:center;gap:8px;padding:calc(env(safe-area-inset-top) + 8px) 12px 8px;
  border-bottom:1px solid var(--line);min-height:52px;background:var(--bg)}
.bar .title{min-width:0;display:flex;flex-direction:column}
.bar .title h1{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.status{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:62vw}
.icon-btn{min-width:36px;height:36px;border-radius:10px;font-size:15px;display:inline-flex;align-items:center;
  justify-content:center;padding:0 8px}
#back-btn,#doc-back{font-size:30px;line-height:1;padding-bottom:4px}
.menu{position:absolute;right:10px;top:calc(env(safe-area-inset-top) + 54px);background:var(--them);
  border-radius:12px;box-shadow:0 6px 24px #0004;z-index:5;display:flex;flex-direction:column;overflow:hidden}
.menu button{padding:12px 18px;text-align:left;border-bottom:1px solid var(--line)}
.menu button:last-child{border:0}

.topics{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1;padding-bottom:env(safe-area-inset-bottom)}
.topics li{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line)}
.topics .av{width:42px;height:42px;border-radius:50%;background:var(--them);display:flex;align-items:center;
  justify-content:center;font-weight:650;flex:none;text-transform:uppercase}
.topics .tx{min-width:0;flex:1}
.topics .nm{font-weight:600}
.topics .ls{color:var(--muted);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topics .busy .ls{color:var(--fg)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--fg);flex:none;animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.25}}

.msgs{flex:1;overflow-y:auto;padding:12px 10px;display:flex;flex-direction:column;gap:6px;-webkit-overflow-scrolling:touch}
.msg{max-width:86%;padding:8px 12px;border-radius:18px;word-wrap:break-word;overflow-wrap:anywhere}
.msg.user{align-self:flex-end;background:var(--me);color:var(--me-fg);border-bottom-right-radius:6px}
.msg.assistant,.msg.partial{align-self:flex-start;background:var(--them);border-bottom-left-radius:6px}
.msg.partial{opacity:.75}
.msg.system,.msg.error{align-self:center;background:var(--sys);font-size:13px;color:var(--muted);max-width:94%;
  border-radius:12px}
.msg.error{color:#d33}
.msg p{margin:.35em 0}.msg p:first-child{margin-top:0}.msg p:last-child{margin-bottom:0}
.msg ul,.msg ol{margin:.35em 0;padding-left:1.3em}
.msg pre,.doc-body pre{background:var(--code);padding:8px 10px;border-radius:8px;overflow-x:auto;font-size:13px}
.msg code,.doc-body code{font:13px ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--code);
  padding:.05em .3em;border-radius:4px}
.msg pre code,.doc-body pre code{background:none;padding:0}
.msg h1,.msg h2,.msg h3,.msg h4{font-size:1em;margin:.5em 0 .2em}
.msg table,.doc-body table{border-collapse:collapse;display:block;overflow-x:auto;font-size:14px;margin:.4em 0}
.msg td,.msg th,.doc-body td,.doc-body th{border:1px solid var(--line);padding:4px 8px}
.msg blockquote,.doc-body blockquote{margin:.4em 0;padding:.1em .8em;border-left:3px solid var(--muted)}
.msg .time{font-size:11px;color:var(--muted);margin-top:2px;text-align:right}
.msg.user .time{color:inherit;opacity:.6}
.att{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.att img{max-width:100%;max-height:340px;border-radius:12px;display:block}
.att a.file,.att button.docl{display:block;padding:8px 10px;border-radius:10px;background:var(--sys);
  text-decoration:none;text-align:left;font-size:14px}
.msg.user .att a.file{background:#ffffff26}
.att .missing{font-size:13px;color:var(--muted)}
.more{align-self:center;font-size:13px;color:var(--muted);padding:6px}

.composer{border-top:1px solid var(--line);padding:6px 8px calc(env(safe-area-inset-bottom) + 6px);background:var(--bg)}
.composer .row{display:flex;align-items:flex-end;gap:6px}
.composer textarea{flex:1;resize:none;font:16px/1.35 inherit;font-family:inherit;padding:8px 12px;border-radius:18px;
  border:1px solid var(--line);background:var(--bg);color:inherit;max-height:160px;outline:none}
.send{width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--bg);font-size:18px;font-weight:700;flex:none}
.send:disabled{opacity:.35}
.attach{font-size:22px;cursor:pointer}
.chips{display:flex;flex-wrap:wrap;gap:4px}
.chips span{font-size:12px;background:var(--sys);border-radius:8px;padding:3px 8px;margin-bottom:6px}

.doc-wrap{flex:1;overflow-y:auto;padding:12px 16px calc(env(safe-area-inset-bottom) + 30px)}
.doc-body{line-height:1.6;font-size:16px}
.doc-body h1{font-size:1.4em;margin:1em 0 .4em}.doc-body h2{font-size:1.2em;margin:1.2em 0 .4em;
  border-bottom:1px solid var(--line);padding-bottom:.2em}.doc-body h3{font-size:1.05em}
.doc-body a.wl{text-decoration:none;border-bottom:1px dotted currentColor}
.doc-body .wl-miss{opacity:.55;border-bottom:1px dashed var(--muted)}
.related{margin-top:2em;border-top:1px solid var(--line);padding-top:1em;font-size:15px}
.related h2{font-size:14px;color:var(--muted);font-weight:600;margin:1em 0 .4em}
.related button,.doc-results button{display:block;text-align:left;padding:7px 0;border-bottom:1px solid var(--line);width:100%}
.doc-search input{width:100%;padding:10px 12px;font-size:16px;border-radius:12px;border:1px solid var(--line);
  background:var(--bg);color:inherit}
.doc-results{list-style:none;padding:0;margin:8px 0}
.doc-results small{display:block;color:var(--muted);font-size:13px}

.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(env(safe-area-inset-bottom) + 80px);
  background:var(--fg);color:var(--bg);padding:9px 16px;border-radius:12px;font-size:14px;z-index:20;max-width:90vw}

/* онбординг iOS: телефон, панель Safari, лист «Поделиться» */
.ios-demo{position:relative;width:200px;height:250px;margin:14px 0}
.phone{position:absolute;left:30px;top:0;width:140px;height:240px;border:3px solid var(--fg);border-radius:26px;
  overflow:hidden;display:flex;flex-direction:column}
.phone-screen{flex:1;padding:16px 10px;display:flex;flex-direction:column;gap:7px}
.bubble{height:14px;border-radius:7px;background:var(--them)}
.b1{width:70%}.b2{width:50%;align-self:flex-end;background:var(--fg)}.b3{width:60%}
.phone-bar{height:34px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.share-icon{position:relative;display:inline-block;width:14px;height:14px;border:2px solid var(--fg);border-top:0;
  border-radius:0 0 3px 3px;margin-top:6px}
.share-icon::before{content:"";position:absolute;left:4px;top:-9px;width:2px;height:12px;background:var(--fg)}
.share-icon::after{content:"";position:absolute;left:1.5px;top:-9px;width:5px;height:5px;border-left:2px solid var(--fg);
  border-top:2px solid var(--fg);transform:rotate(45deg)}
.phone-bar .share-icon{animation:pulse 1.4s infinite}
.share-icon.inline{width:11px;height:11px;margin:0 2px;vertical-align:-1px}
.share-icon.inline::before{left:2.5px;top:-8px;height:10px}.share-icon.inline::after{left:0;top:-8px;width:4px;height:4px}
.plus-icon{display:inline-block;width:16px;height:16px;border:2px solid var(--fg);border-radius:4px;position:relative;vertical-align:-3px}
.plus-icon::before,.plus-icon::after{content:"";position:absolute;background:var(--fg);left:50%;top:50%;transform:translate(-50%,-50%)}
.plus-icon::before{width:8px;height:2px}.plus-icon::after{width:2px;height:8px}
.sheet{position:absolute;left:0;right:0;bottom:-6px;background:var(--them);border-radius:14px;padding:10px 12px;
  box-shadow:0 4px 18px #0003;animation:rise 2.8s infinite}
.sheet-row{display:flex;justify-content:space-between;align-items:center;font-size:14px;font-weight:600}
@keyframes rise{0%,30%{transform:translateY(30px);opacity:0}45%,90%{transform:none;opacity:1}100%{opacity:0}}
.steps{text-align:left;max-width:320px;padding-left:1.3em;line-height:1.9}

/* Staging remains useful for login and file checks without accepting model work. */
.readiness-note{padding:10px 14px;background:var(--sys);color:var(--muted);font-size:13px;border-bottom:1px solid var(--line)}
.menu button:disabled{opacity:.5;cursor:default}