/* A viewport-bound chat surface. Only conversation/drawer contents scroll. */
html.rh-chat-viewport,html.rh-chat-viewport body,html.rh-chat-viewport #app{height:100%;min-height:0;overflow:hidden;overscroll-behavior:none}
.rh-chat-viewport .dashboard-shell{position:fixed;top:var(--rh-chat-top,0px);left:0;right:0;bottom:auto;height:var(--rh-chat-height,100dvh);min-height:0;overflow:hidden}
.rh-chat-viewport .dashboard-area{display:flex;flex-direction:column;height:100%;min-height:0;overflow:hidden}
.rh-chat-viewport .sidebar{top:var(--rh-chat-top,0px);bottom:auto;height:var(--rh-chat-height,100dvh);overflow-y:auto}
.rh-chat-viewport .dash-topbar{flex-shrink:0}
.rh-chat-viewport .dashboard-content{display:flex;flex:1;min-height:0;max-width:none;width:100%;overflow:hidden;padding:18px 24px}
.rh-chat-viewport #web-chat{display:flex;flex:1;min-width:0;min-height:0}
.dashboard-content:has(#web-chat){padding-top:18px;padding-bottom:18px}
.dashboard-area:has(#web-chat) .dashboard-foot{display:none}
.chat-layout{display:grid;grid-template-columns:168px minmax(0,1fr);grid-template-rows:minmax(0,1fr);gap:28px;height:100%;min-height:0;width:100%;flex:1}
.chat-history{display:flex;flex-direction:column;min-width:0;min-height:0;padding:8px 0 0}
.chat-new{display:flex;align-items:center;gap:10px;background:transparent;border:1px solid var(--line);border-radius:10px;padding:11px 14px;text-align:left;font:500 13px var(--font)}
.chat-new span{font-size:20px;font-weight:400;line-height:1}
.chat-new:hover,.chat-thread:hover{background:var(--surface)}
.chat-history-list{margin-top:25px;min-height:0;overflow-y:auto;scrollbar-width:thin}
.chat-history-list>summary{font-size:12px;color:var(--muted);cursor:pointer;margin-bottom:10px}
.chat-history-list nav{display:grid;gap:4px}
.chat-thread{background:transparent;color:var(--muted);padding:11px 12px;text-align:left;border-radius:8px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font:13px var(--font);cursor:pointer;min-width:0}
.chat-thread.selected{background:var(--surface);color:var(--ink)}
.chat-private{font-size:11px;color:var(--muted);line-height:1.6;margin:auto 10px 16px;padding-top:20px}
.chat-workspace{display:flex;flex-direction:column;min-width:0;min-height:0}
.chat-toolbar{display:flex;justify-content:flex-end;align-items:center;gap:12px;min-height:48px;margin-bottom:12px}
.chat-model-picker{flex:1;min-width:0}
.chat-model-picker select{max-width:100%;width:auto;color:var(--ink);background:var(--surface);border:0;border-radius:8px;padding:7px 24px 7px 8px;font:500 12px var(--font);cursor:pointer;text-overflow:ellipsis}
.chat-model-picker select:hover{background:var(--surface)}
.chat-web-picker{flex-shrink:0;max-width:112px}
.chat-web-picker select{width:100%;background:transparent;color:var(--muted);border:0;border-radius:8px;padding:7px 4px;font:500 11px var(--font);cursor:pointer}
.chat-web-note{font-size:10px;line-height:1.6;color:var(--muted);margin:6px 4px 0}
.chat-sources{font-size:11px;line-height:1.7;color:var(--muted);margin-top:12px}
.chat-sources summary{cursor:pointer}
.chat-sources ul{padding-left:18px;margin-top:6px}
.chat-sources a{color:var(--ink);overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:3px}
.chat-preview,.chat-credit{font-size:11px;color:var(--muted);white-space:nowrap}
.chat-delete{display:grid;place-items:center;background:transparent;color:var(--muted);width:36px;height:36px;border-radius:8px;flex-shrink:0}
.chat-delete:hover{background:var(--surface);color:var(--ink)}
.chat-delete svg{width:17px;height:17px}
.chat-messages{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:22px max(12px,calc((100% - 720px)/2));scrollbar-width:thin;scroll-padding-bottom:20px}
.chat-workspace.is-empty .chat-messages{display:flex;flex:1;align-items:center;justify-content:center;overflow:auto;padding-bottom:30px}
.chat-welcome{text-align:center}
.chat-welcome h1{font:500 clamp(25px,3vw,36px)/1.2 var(--font);letter-spacing:-.035em;margin:0}
.chat-welcome p{color:var(--muted);font-size:14px;margin-top:12px}
.chat-message{padding:8px 0;margin:0 auto 25px;width:100%;max-width:720px}
.chat-message.user{width:fit-content;max-width:85%;margin-left:auto;margin-right:0;background:var(--surface-raised);border-radius:20px;padding:12px 19px}
.chat-message.user .chat-message-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.chat-message-label{font-size:12px;font-weight:500;color:var(--muted);margin-bottom:10px}
.chat-message-text{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.85}
.chat-message-text pre{white-space:pre-wrap;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;overflow:auto;font-size:12px;line-height:1.7;margin:14px 0}
.chat-message.assistant .chat-message-text{white-space:normal}
.chat-message.assistant .chat-format-fallback{white-space:pre-wrap}
.chat-message-text p{margin:0 0 14px}
.chat-message-text>:last-child{margin-bottom:0}
.chat-message-text h2,.chat-message-text h3,.chat-message-text h4,.chat-message-text h5,.chat-message-text h6{font-family:var(--font);font-weight:600;line-height:1.4;margin:24px 0 12px;letter-spacing:-.015em}
.chat-message-text h2{font-size:23px}.chat-message-text h3{font-size:20px}.chat-message-text h4,.chat-message-text h5,.chat-message-text h6{font-size:17px}
.chat-message-text ul,.chat-message-text ol{padding-left:25px;margin:12px 0 18px;list-style-position:outside}
.chat-message-text ul{list-style-type:disc}.chat-message-text ol{list-style-type:decimal}
.chat-message-text li{margin:5px 0}.chat-message-text li p{margin:5px 0}
.chat-message-text blockquote{border-left:3px solid var(--line);padding:2px 0 2px 16px;color:var(--muted);margin:16px 0}
.chat-message-text hr{border:0;border-top:1px solid var(--line);margin:20px 0}
.chat-message-text a{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.chat-message-text :not(pre)>code{font-size:.88em;background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:2px 5px;white-space:pre-wrap}
.chat-code{margin:16px 0;min-width:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.chat-code-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 14px;border-bottom:1px solid var(--line);font:11px var(--font);color:var(--muted)}
.chat-code-copy{background:transparent;color:var(--muted);font:11px var(--font);cursor:pointer;padding:3px}
.chat-code-copy:hover{color:var(--ink)}
.chat-message-text .chat-code pre{border:0;border-radius:0;margin:0;white-space:pre;overflow:auto;max-width:100%;tab-size:2}
.chat-table{overflow:auto;max-width:100%;margin:16px 0}
.chat-table table{border-collapse:collapse;font-size:14px;width:100%;white-space:normal}
.chat-table th,.chat-table td{border:1px solid var(--line);padding:8px 12px;min-width:90px;text-align:left}
.chat-table th{font-weight:600;background:var(--surface)}
.chat-math-display{overflow:auto;max-width:100%;margin:16px 0;padding:4px 0}
.chat-math-display .katex-display{margin:0}.chat-math-display .katex-display>.katex{white-space:nowrap}
.chat-math-inline .katex{font-size:1.1em}
.chat-message small{display:block;font-size:12px;line-height:1.7;color:var(--muted);margin-top:10px}
.chat-copy{background:transparent;color:var(--muted);font:11px var(--font);cursor:pointer;margin-top:12px;padding:4px 0}
.chat-copy:hover{color:var(--ink)}
.chat-thinking{color:var(--muted);font-size:14px}
.chat-compose{width:min(100%,720px);margin:0 auto;padding-top:10px;flex-shrink:0}
.chat-workspace.is-empty .chat-compose{flex:0 0 auto;min-height:0}
#chat-form{border:1px solid var(--line);border-radius:22px;background:var(--surface);padding:16px 17px 10px;transition:border-color .15s}
#chat-form:focus-within{border-color:var(--muted)}
#chat-input{display:block;width:100%;resize:none;min-height:30px;max-height:180px;box-sizing:border-box;border:0;border-radius:0;background:transparent;color:var(--ink);font:15px/1.7 var(--font);padding:0 3px;outline:0}
#chat-input::placeholder{color:var(--muted);opacity:1}
.rh-chat-viewport #chat-input{max-height:min(180px,calc(var(--rh-chat-height,100dvh)*.22));overflow-y:auto;overscroll-behavior:contain}
.chat-compose-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px}
.chat-keyboard-hint{font-size:10px;color:var(--muted);text-align:right;margin:7px 6px 0}
.chat-send{display:grid;place-items:center;width:36px;height:36px;background:var(--ink);color:var(--paper);border-radius:50%;flex-shrink:0}
.chat-send svg{width:20px;height:20px}
.chat-send:disabled{opacity:.3}
.chat-stop-icon{width:12px;height:12px;border-radius:2px;background:currentColor}
.chat-starters{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:18px}
.chat-starters button{padding:9px 14px;border:1px solid var(--line);border-radius:20px;color:var(--muted);background:transparent;font:12px var(--font);cursor:pointer}
.chat-starters button:hover{color:var(--ink);background:var(--surface)}
.chat-status{font-size:12px;line-height:1.6;color:var(--muted)}
.chat-status:not(:empty){padding:8px 4px}
.chat-fine-print{position:relative;display:flex;align-items:baseline;justify-content:center;gap:9px;flex-wrap:wrap;color:var(--muted);font-size:10px;line-height:1.7;padding:12px 0 6px}
.chat-about{position:static}
.chat-about>summary{cursor:pointer;text-decoration:underline;text-underline-offset:3px;list-style:none}
.chat-about>summary::-webkit-details-marker{display:none}
.chat-about-content{position:absolute;z-index:10;bottom:calc(100% + 12px);right:0;width:min(420px,calc(100vw - 50px));max-height:min(300px,calc(var(--rh-chat-height,100dvh)*.6));overflow:auto;padding:18px;background:var(--surface-raised);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 35px #0004;color:var(--muted);font-size:12px;line-height:1.8}
.chat-about-content p+p{margin-top:12px}
.chat-about-content a{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.chat-layout button:focus-visible,.chat-layout select:focus-visible,.chat-layout summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.chat-layout button:disabled{cursor:not-allowed}
@media(min-width:1101px){.chat-history-list>summary{list-style:none}}
@media(max-width:1100px){
  .chat-layout{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);gap:12px}
  .chat-history{display:block;padding:0;position:relative}
  .chat-new{display:inline-flex;padding:8px 12px}
  .chat-history-list{display:inline-block;margin:0 0 0 15px;overflow:visible;vertical-align:middle}
  .chat-history-list>summary{margin:0}
  .chat-history-list nav{position:absolute;left:0;top:45px;z-index:12;max-height:min(270px,calc(var(--rh-chat-height,100dvh)*.5));overflow:auto;width:min(280px,100%);padding:8px;border:1px solid var(--line);border-radius:12px;background:var(--surface-raised)}
  .chat-private{display:none}
  .chat-toolbar{gap:6px;margin-bottom:0}
  .chat-messages{padding-inline:8px}
}
@media(max-width:600px){
  .dashboard-content:has(#web-chat){padding:12px 16px}
  .chat-layout{gap:8px}
  .chat-model-picker select{font-size:12px;padding-left:0;padding-right:4px}
  .chat-preview{font-size:9px;white-space:normal;max-width:95px;text-align:right}
  .chat-workspace.is-empty .chat-messages{padding-bottom:25px}
  .chat-welcome p{font-size:13px}
  .chat-message-text{font-size:14px}
  .chat-message.user{max-width:92%}
  #chat-input{font-size:16px}
  .chat-starters{gap:6px}
  .chat-starters button{font-size:11px;padding:8px 10px}
  .chat-keyboard-hint{font-size:9px}
  .chat-fine-print{font-size:9px;gap:6px}
}
.rh-chat-compact .chat-keyboard-hint,.rh-chat-compact .chat-fine-print{display:none}
.rh-chat-compact .chat-toolbar{min-height:32px}
.rh-chat-compact .chat-messages{padding-block:0}
.rh-chat-compact .chat-compose{padding-top:4px;min-height:0;flex-shrink:1;overflow-y:auto}
.rh-chat-compact #chat-input{max-height:min(72px,calc(var(--rh-chat-height,100dvh)*.16))}
.rh-chat-compact .chat-status{max-height:20px;overflow-y:auto;padding-block:3px;font-size:10px;line-height:1.4}