*{box-sizing:border-box}html,body{height:100%;overflow:hidden}body{margin:0;background:var(--bg);color:var(--ink);font:13px/1.65 var(--sans);-webkit-text-size-adjust:100%}button,input,select,textarea{font:inherit;color:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{background:none;border:1px solid transparent;border-radius:6px;cursor:pointer;padding:6px 9px;touch-action:manipulation}button:hover{background:var(--code-bg)}button:disabled{opacity:.45;cursor:wait}input,textarea,select{background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:7px 9px;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--ink-3)}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.muted,.fineprint{color:var(--ink-3)}.fineprint{font-size:11px;line-height:1.7}.chat-header{height:62px;display:flex;align-items:center;gap:16px;max-width:1440px;margin:auto;padding:0 30px;border-bottom:1px solid var(--line);font-size:12px}.chat-header .brand{font-size:16px;font-weight:600;letter-spacing:-.3px}.header-separator{color:var(--ink-3)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:12px}#history-toggle{display:none}.chat-layout{height:calc(100dvh - 62px);max-width:1440px;margin:auto;display:flex}#history-panel{width:235px;flex:none;padding:20px 16px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.history-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;margin-bottom:15px}.history-top>span{color:var(--ink-3)}#new-chat{border-color:var(--line)}#history-search{width:100%;font-size:12px;margin-bottom:14px}#sessions{flex:1;overflow:auto;overscroll-behavior:contain}.session{display:block;width:100%;text-align:left;padding:11px 9px;margin:2px 0;overflow:hidden}.session strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:400}.session small{display:block;color:var(--ink-3);font-size:10px}.session.current{background:var(--code-bg);color:var(--ink)}.history-note{font-size:10px;color:var(--ink-3);margin:16px 4px 0}#main{min-width:0;flex:1;display:flex;flex-direction:column;position:relative}.conversation-bar{flex:none;display:flex;justify-content:space-between;align-items:center;height:56px;padding:0 24px;font-size:11px}.conversation-bar>div{white-space:nowrap}#rename{display:flex;gap:10px;min-width:0;align-items:center}#session-title{max-width:32ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#settings-dot:not(:empty){display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--accent);font-size:0}#context-banner{margin:0 28px 8px;padding:7px 10px;border-left:2px solid var(--line-strong);font-size:11px;color:var(--ink-3)}#messages{flex:1;overflow:auto;overscroll-behavior:contain;padding:10px max(28px,calc((100% - 790px)/2)) 28px;scroll-behavior:auto;min-height:0}.welcome{margin:clamp(30px,10vh,100px) auto 30px;max-width:540px}.eyebrow{font-size:9px;letter-spacing:2px;color:var(--ink-3)}.welcome h1{font-size:29px;font-weight:400;letter-spacing:-.7px;line-height:1.5;margin:16px 0}.welcome p{font-size:12px;color:var(--ink-2)}.suggestions{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}.suggestions button{border-color:var(--line);font-size:11px}.message{margin:18px 0 28px;min-width:0}.message-head{display:flex;align-items:center;gap:9px;font-size:10px;color:var(--ink-3);margin-bottom:8px}.message-head b{font-weight:500;color:var(--ink-2)}.message.user .md{background:var(--code-bg);border-radius:9px;padding:11px 15px;display:block;max-width:100%;width:fit-content}.message.user{margin-left:min(8%,50px)}.message.user .message-head{justify-content:flex-end}.message.user .md{margin-left:auto}.message-footer{display:flex;align-items:center;gap:7px;color:var(--ink-3);font-size:10px;margin-top:8px}.message-footer button{padding:3px 7px}.thinking{border-left:2px solid var(--line);padding:5px 12px;margin:8px 0 14px;color:var(--ink-3);font-size:11px}.thinking summary{cursor:pointer}.thinking pre{font:inherit;white-space:pre-wrap;max-height:250px;overflow:auto;margin:8px 0 0}.message-files{display:flex;flex-wrap:wrap;gap:7px;margin:8px 0;font-size:11px}.message-files a,.attachment{background:var(--code-bg);border:1px solid var(--line);border-radius:6px;padding:4px 7px;max-width:100%;overflow-wrap:anywhere}.md{font-size:13px;line-height:1.85;overflow-wrap:anywhere;min-width:0}.md p{margin:0 0 12px}.md p:last-child{margin-bottom:0}.md h1,.md h2,.md h3,.md h4{line-height:1.5;margin:22px 0 10px;font-weight:550}.md h1{font-size:21px}.md h2{font-size:18px}.md h3{font-size:15px}.md h4{font-size:13px}.md ul,.md ol{padding-left:23px;margin:10px 0}.md li p{margin:4px 0}.md a{color:var(--accent);text-decoration:underline}.md blockquote{border-left:2px solid var(--line-strong);margin:12px 0;padding:0 15px;color:var(--ink-2)}.md code{font:11.5px/1.7 var(--mono);background:var(--code-bg);padding:2px 4px;border-radius:3px}.md pre{margin:0;overflow:auto;padding:14px 16px;max-height:480px;background:var(--code-bg);border-radius:0 0 6px 6px}.md pre code{background:none;padding:0;white-space:pre;word-break:normal;overflow-wrap:normal;tab-size:2}.md .code-wrap{margin:14px 0;border:1px solid var(--line);border-radius:7px;overflow:hidden;max-width:100%}.code-bar{background:var(--bg-elev);display:flex;align-items:center;gap:5px;padding:3px 8px;border-bottom:1px solid var(--line);font-size:10px;color:var(--ink-3)}.code-bar .lang{margin-right:auto}.code-bar button{font-size:10px;padding:4px 7px}.table-wrap{max-width:100%;overflow:auto;margin:14px 0}.md table{border-collapse:collapse;min-width:50%;font-size:12px}.md td,.md th{padding:7px 11px;border:1px solid var(--line);white-space:normal}.md th{background:var(--code-bg);font-weight:550}.md hr{border:0;border-top:1px solid var(--line);margin:20px 0}.md details{margin:12px 0;border:1px solid var(--line);border-radius:6px;padding:8px 12px}.md summary{cursor:pointer;color:var(--ink-2)}.md img,.run-result img{max-width:100%;height:auto;border-radius:4px}.md .katex-display{overflow:auto;padding:6px 0;margin:14px 0}.md .katex{font-size:1.12em}.hljs-keyword,.hljs-selector-tag{color:var(--hl-kw,#96705e)}.hljs-string,.hljs-attr{color:var(--hl-str,#668068)}.hljs-number,.hljs-literal{color:var(--hl-num,#587d99)}.hljs-title,.hljs-function{color:var(--hl-fn,#5b7aa0)}.hljs-comment{color:var(--ink-3)}.run-result{margin:9px 0 18px;padding:12px;border:1px solid var(--line);border-radius:7px;font-size:11px}.run-result pre{white-space:pre-wrap;overflow:auto;font:11px/1.7 var(--mono);max-height:250px;margin:6px 0}.run-result .result-title{color:var(--ink-3);margin-bottom:7px}.run-result a{display:block}.diagram{overflow:auto;margin:15px 0;background:white;padding:12px;border-radius:5px}.diagram svg{max-width:100%;height:auto}
.composer-area{flex:none;padding:10px max(24px,calc((100% - 800px)/2)) max(12px,env(safe-area-inset-bottom));background:var(--bg)}#composer{border:1px solid var(--line-strong);border-radius:11px;padding:8px 10px;background:var(--bg-elev)}#question{display:block;width:100%;min-height:58px;max-height:180px;resize:none;border:none;background:none;padding:7px 6px;font-size:13px;line-height:1.6}.composer-controls{display:flex;align-items:center;gap:5px;min-width:0}.composer-controls select{background:transparent;border:0;font-size:10px;min-width:0;padding:7px 2px;max-width:170px;cursor:pointer}.attach-button{position:relative;overflow:hidden;display:inline-flex;padding:7px 5px;white-space:nowrap;font-size:11px;cursor:pointer}.attach-button input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.model-label{min-width:0;display:flex}.effort-label{display:flex;align-items:center;gap:2px;font-size:10px;color:var(--ink-3)}#send{margin-left:auto;flex:none;background:var(--ink);color:var(--bg);padding:6px 12px;font-size:11px}#stop{margin-left:auto;border-color:var(--line);font-size:11px}.composer-foot{display:flex;justify-content:space-between;gap:12px;margin:7px 4px 0;font-size:9px;color:var(--ink-3)}#attachments{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px;font-size:10px}.attachment button{padding:0 4px}#jump-bottom{position:absolute;bottom:160px;right:26px;background:var(--bg-elev);border-color:var(--line);box-shadow:0 3px 12px #0001;font-size:10px}#settings-panel{width:300px;flex:none;border-left:1px solid var(--line);padding:16px 20px;overflow:auto;overscroll-behavior:contain;background:var(--bg);font-size:12px}#settings-panel>header{display:flex;justify-content:space-between;align-items:center}#settings-panel>section{padding:18px 0;border-bottom:1px solid var(--line)}#settings-panel h3{font-size:12px;font-weight:550;margin:0 0 8px}#settings-panel p{font-size:11px;line-height:1.75}#article-search{width:100%;font-size:11px;margin:5px 0 10px}#articles{max-height:210px;overflow:auto}#articles label{display:flex;gap:7px;padding:6px 0;font-size:11px;cursor:pointer}input[type=checkbox]{accent-color:var(--ink-2);flex:none}.section-title{display:flex;justify-content:space-between}.switch{display:flex;align-items:center;cursor:pointer}.switch input{position:absolute;opacity:0}.switch span{display:block;width:29px;height:17px;background:var(--line-strong);border-radius:20px;position:relative}.switch span:after{content:'';position:absolute;top:3px;left:3px;width:11px;height:11px;background:var(--bg);border-radius:50%;transition:transform .15s}.switch input:checked+span{background:var(--ink-2)}.switch input:checked+span:after{transform:translateX(12px)}.switch input:focus-visible+span{outline:2px solid var(--accent)}.prompt-row{border:1px solid var(--line);border-radius:6px;padding:9px;margin:8px 0;display:flex;align-items:center;gap:5px}.prompt-row>button:first-child{flex:1;text-align:left;font-size:11px;padding:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prompt-row .delete-prompt{padding:1px 5px}.prompt-row.inactive{opacity:.6}#add-prompt{border-color:var(--line);width:100%;font-size:11px}.context-break{display:flex;align-items:center;gap:12px;font-size:10px;color:var(--ink-3);margin:24px 0}.context-break:before,.context-break:after{content:'';height:1px;background:var(--line);flex:1}dialog{color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:28px;width:min(460px,calc(100% - 32px));max-height:calc(100dvh - 40px);overflow:auto;box-shadow:0 16px 60px #0003}dialog::backdrop{background:#0005;backdrop-filter:blur(3px)}dialog h2{font-size:19px;font-weight:500;margin:12px 0}dialog p{font-size:12px;color:var(--ink-3)}dialog input,dialog textarea{display:block;width:100%;margin:7px 0 14px}dialog label{font-size:11px}dialog button[type=submit]{background:var(--ink);color:var(--bg)}#login-form>a{display:inline-block;padding:6px 15px;font-size:11px}#login-error{color:#b66150}.dialog-actions{display:flex;justify-content:flex-end;gap:8px}#toast{position:fixed;z-index:1000;bottom:calc(22px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:max-content;max-width:calc(100% - 30px);background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:7px;box-shadow:0 3px 18px #0002;font-size:12px}#shade{position:fixed;inset:62px 0 0;background:#0004;z-index:25}.busy #settings-panel input,.busy #settings-panel button{pointer-events:none;opacity:.5}@media(min-width:1000px){#settings-panel:not([hidden])~*{display:none}}@media(max-width:1180px){#settings-panel{position:fixed;z-index:40;right:0;top:62px;bottom:0;width:320px;box-shadow:-5px 0 25px #0001}}@media(max-width:760px){.chat-header{height:54px;padding:0 16px;gap:10px}.chat-header .brand{font-size:14px}.top-actions{gap:5px;font-size:11px}.top-actions>a{display:none}#history-toggle{display:block}.chat-layout{height:calc(100dvh - 54px)}#history-panel{position:fixed;z-index:40;left:0;top:54px;bottom:0;width:min(285px,85vw);background:var(--bg);transform:translateX(-101%);transition:transform .18s}body.history-open #history-panel{transform:translateX(0)}#settings-panel{top:54px;width:min(330px,93vw)}#shade{inset:54px 0 0}.conversation-bar{height:48px;padding:0 9px}.conversation-bar button{font-size:11px}#session-title{max-width:18ch}#messages{padding:8px 18px 18px}.welcome{margin:8vh 8px 20px}.welcome h1{font-size:25px}.composer-area{padding:6px 10px max(9px,env(safe-area-inset-bottom))}#question{font-size:16px;min-height:64px;max-height:130px}#composer{padding:5px 7px}.composer-controls{gap:3px;flex-wrap:wrap}.composer-controls select{font-size:10px;max-width:145px}.model-label{flex:1;min-width:70px}.model-label select{width:100%}.effort-label>span{display:none}.attach-button{font-size:10px;padding:6px 3px}#send{padding:6px 9px}.keyboard-hint{display:none}.message{margin-bottom:23px}.md{font-size:13px}.message.user{margin-left:10px}#context-banner{margin:0 15px 5px;font-size:10px}dialog input,dialog textarea,#history-search,#article-search{font-size:16px}.code-bar button{min-height:32px}#jump-bottom{bottom:158px;right:18px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* Keep the input above the iOS software keyboard. */
body{position:fixed;inset:0;height:var(--chat-height,100dvh);top:var(--chat-offset,0px)}.chat-layout{height:calc(var(--chat-height,100dvh) - 62px)}dialog{max-height:calc(var(--chat-height,100dvh) - 40px)}@media(max-width:760px){.chat-layout{height:calc(var(--chat-height,100dvh) - 54px)}}
/* Give switches a real, finger-sized input hit area. */
.switch{position:relative;min-width:36px;min-height:32px;justify-content:center}.switch input{inset:0;margin:0;width:100%;height:100%;z-index:1;cursor:pointer}.switch span{pointer-events:none}.md input[type=checkbox]{vertical-align:middle;margin-right:5px}

/* Accessible state and narrow-screen controls. */
button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#messages{overflow-anchor:none}.message-footer{flex-wrap:wrap}.message-status{overflow-wrap:anywhere}
#reload-chat{border-color:var(--line);font-size:11px}.composer-foot{flex-wrap:wrap}
@media(max-width:760px){.message-footer button,.conversation-bar button,#new-chat,#settings-close{min-height:40px}.composer-controls select{max-width:min(170px,42vw)}#settings-panel,#history-panel{bottom:auto;height:calc(var(--chat-height,100dvh) - 54px)}}