:root {
  --ink:#201b2d; --night:#302b4d; --night2:#3d365f; --cream:#fff4d8; --paper:#f8f3e8;
  --white:#fffdf8; --coral:#f05d7a; --coral-text:#b52d4d; --mint:#66d7b0; --sky:#6ab7ff; --amber:#ffc857;
  --lavender:#b79cff; --muted:#6f6879; --line:rgba(32,27,45,.16);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --sans:Inter,ui-rounded,"SF Pro Rounded","Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden}
body{color:var(--ink);background:var(--paper);font-family:var(--sans);line-height:1.45}
button,textarea,input{font:inherit;color:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.chat-app{width:100%;height:100dvh;display:grid;grid-template-columns:270px minmax(0,1fr);overflow:hidden}
.side-panel{min-height:0;padding:20px 16px;display:flex;flex-direction:column;gap:19px;color:var(--cream);background:var(--ink);border-right:2px solid var(--ink);overflow-y:auto}
.side-top{display:flex;align-items:center;justify-content:space-between}
.app-brand{display:grid;grid-template-columns:32px auto;align-items:center;gap:0 10px;color:var(--cream);text-decoration:none;font:900 18px/1 var(--mono);letter-spacing:.12em}
.app-brand>span{grid-row:span 2;display:grid;place-items:center;width:32px;height:32px;color:var(--ink);background:var(--coral);box-shadow:3px 3px 0 var(--cream)}
.app-brand small{color:rgba(255,244,216,.55);font-size:7px;letter-spacing:.1em}
.close-menu{display:none;width:44px;height:44px;border:0;background:transparent;color:var(--cream);font-size:27px}
.new-thread{width:100%;min-height:44px;display:flex;align-items:center;gap:10px;padding:7px 10px;border:2px solid var(--cream);background:transparent;color:var(--cream);font:800 9px var(--mono)}
.new-thread b{display:grid;place-items:center;width:25px;height:25px;color:var(--ink);background:var(--mint);font-size:16px}
.new-thread:hover{color:var(--ink);background:var(--cream)}
.brain-card{padding:14px;border:2px solid var(--cream);background:var(--night);box-shadow:4px 4px 0 var(--coral)}
.brain-card>span,.panel-label{display:block;color:var(--amber);font:800 8px var(--mono);letter-spacing:.12em}
.brain-card h2{margin:6px 0 4px;font-size:14px}
.brain-card p{min-height:26px;margin:0;color:rgba(255,244,216,.68);font-size:9px}
.context-control{margin-top:10px;padding-top:9px;border-top:1px solid rgba(255,244,216,.2)}
.context-control label{display:flex;justify-content:space-between;gap:8px;color:rgba(255,244,216,.62);font:700 7px var(--mono);letter-spacing:.06em}
.context-control output{color:var(--cream);font-weight:900}
.context-control input[type="range"]{position:static;width:100%;height:24px;margin:3px 0 0;opacity:1;accent-color:var(--coral);cursor:pointer}
.context-control input:disabled{cursor:not-allowed;opacity:.45}
.context-scale{display:flex;justify-content:space-between;margin-top:-2px;color:rgba(255,244,216,.55);font:700 6px var(--mono);letter-spacing:.04em}
.brain-card.ready .context-scale{color:rgba(32,27,45,.62)}
.context-control small{display:block;min-height:20px;color:rgba(255,244,216,.62);font:7px/1.35 var(--mono)}
.brain-card.ready .context-control label,.brain-card.ready .context-control small{color:rgba(32,27,45,.72)}
.brain-card.ready .context-control output{color:var(--ink)}
.brain-meter{height:6px;margin:11px 0;background:rgba(255,255,255,.13)}
.brain-meter i{display:block;width:0;height:100%;background:var(--lavender);transition:width .2s linear}
.brain-card button{width:100%;min-height:44px;border:1px solid var(--cream);background:var(--coral);color:var(--ink);font:800 8px var(--mono)}
.brain-card.ready{color:var(--ink);background:var(--mint);border-color:var(--mint)}
.brain-card.ready p,.brain-card.ready>span{color:var(--ink)}
.brain-card.failed{background:#6b2f46}
.tool-panel{display:grid;gap:7px}
.tool-panel .panel-label{margin-bottom:4px;color:rgba(255,244,216,.5)}
.tool-panel label{display:block}
.tool-panel input{position:absolute;opacity:0}
.tool-panel span{min-height:44px;display:grid;grid-template-columns:30px 1fr;align-items:center;padding:8px;border:1px solid rgba(255,244,216,.13);color:rgba(255,244,216,.72)}
.tool-panel b{grid-row:span 2;display:grid;place-items:center;width:24px;height:24px;border:1px solid currentColor;font:800 8px var(--mono)}
.tool-panel i{font:normal 800 9px var(--mono)}
.tool-panel em{font:normal 8px var(--sans)}
.tool-panel input:checked+span{color:var(--ink);background:var(--mint);border-color:var(--mint)}
.tool-panel input:disabled+span{opacity:.45}
.tool-panel .file-picker span{color:var(--ink);background:var(--amber);border-color:var(--amber);cursor:pointer}
.tool-panel .file-picker:hover span{background:var(--mint);border-color:var(--mint)}
.side-foot{margin-top:auto;display:grid;gap:14px}
.side-foot>div{display:flex;gap:8px;color:rgba(255,244,216,.5);font-size:9px}
.side-foot>div i{flex:0 0 auto;width:7px;height:7px;margin-top:3px;background:var(--mint)}
.side-foot a{color:var(--cream);font:700 8px var(--mono);text-underline-offset:4px}
.side-links{display:flex;flex-wrap:wrap;gap:14px}
.sidebar-scrim{display:none}
.chat-main{min-width:0;min-height:0;height:100dvh;display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:var(--paper);overflow:hidden}
.chat-topbar{min-height:76px;padding:13px clamp(16px,3vw,38px);display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px;border-bottom:2px solid var(--ink);background:rgba(255,253,248,.92)}
.menu-button{display:none}
.top-title span{display:block;margin-bottom:3px;color:var(--coral-text);font:800 8px var(--mono);letter-spacing:.1em}
.top-title h1{max-width:620px;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:clamp(18px,2vw,26px);letter-spacing:-.03em}
.top-actions{display:flex;align-items:center;gap:8px}
.runtime-state{padding:8px 9px;border:1px solid var(--ink);background:var(--white);white-space:nowrap;font:700 8px var(--mono)}
.runtime-state i{display:inline-block;width:7px;height:7px;margin-right:6px;background:var(--amber)}
.runtime-state i.ready{background:var(--mint)}
.runtime-state i.bad{background:var(--coral)}
.top-actions button{min-height:44px;padding:0 12px;border:1px solid var(--ink);background:var(--white);font:800 8px var(--mono)}
.top-actions button:hover{color:var(--white);background:var(--ink)}
.message-scroll{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:clamp(20px,4vw,46px) clamp(15px,5vw,72px);scroll-behavior:smooth}
.welcome{width:min(720px,100%);margin:min(10vh,80px) auto 20px;text-align:center}
.bit-face,.avatar{display:grid;place-items:center;color:var(--cream);background:var(--ink);box-shadow:4px 4px 0 var(--coral);font:900 18px var(--mono)}
.bit-face{width:58px;height:58px;margin:0 auto 22px;font-size:27px}
.welcome-label{margin:0 0 10px;color:var(--coral-text);font:800 8px var(--mono);letter-spacing:.13em}
.welcome h2{margin:0 0 14px;font-size:clamp(34px,5vw,58px);line-height:.96;letter-spacing:-.055em}
.welcome>p:not(.welcome-label){max-width:550px;margin:0 auto 25px;color:var(--muted);font-size:13px}
.starter-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;text-align:left}
.starter-grid button{min-height:78px;padding:12px;border:1px solid var(--ink);background:var(--white);box-shadow:3px 3px 0 rgba(32,27,45,.14)}
.starter-grid button:hover{background:var(--amber);box-shadow:3px 3px 0 var(--ink)}
.starter-grid b,.starter-grid span{display:block}
.starter-grid b{margin-bottom:12px;color:var(--coral-text);font:800 8px var(--mono)}
.starter-grid span{font-size:11px;font-weight:750}
.message{width:min(820px,100%);margin:0 auto 26px;display:grid;grid-template-columns:36px minmax(0,1fr);gap:13px;align-items:start}
.message.user{grid-template-columns:minmax(0,1fr) 36px}
.message.user .avatar{grid-column:2;background:var(--lavender);color:var(--ink);box-shadow:2px 2px 0 var(--ink);font-size:7px}
.message.user .message-body{grid-column:1;grid-row:1;justify-self:end;width:min(90%,660px);padding:13px 15px;border:1px solid var(--line);background:var(--white)}
.avatar{width:32px;height:32px;font-size:12px}
.message-body{min-width:0;font-size:14px;line-height:1.65}
.message.user .message-body>p{margin:2px 0 10px;white-space:pre-wrap}
.message-meta{display:block;margin-bottom:7px;color:var(--muted);font:700 8px var(--mono);letter-spacing:.08em}
.rich-text{min-width:0;overflow-wrap:anywhere}
.rich-text>:first-child{margin-top:2px}
.rich-text>:last-child{margin-bottom:0}
.rich-text p{margin:0 0 10px}
.rich-text h1,.rich-text h2,.rich-text h3,.rich-text h4{margin:20px 0 8px;line-height:1.2;letter-spacing:-.02em}
.rich-text h1{font-size:1.5em}.rich-text h2{font-size:1.3em}.rich-text h3{font-size:1.13em}.rich-text h4{font-size:1em}
.rich-text ul,.rich-text ol{margin:7px 0 13px;padding-left:24px}
.rich-text li{margin:3px 0;padding-left:2px}
.rich-text li>p{margin:0}
.rich-text blockquote{margin:12px 0;padding:8px 12px;border-left:4px solid var(--lavender);background:rgba(170,139,245,.1);color:var(--muted)}
.rich-text blockquote>:last-child{margin-bottom:0}
.rich-text a{color:var(--coral-text);font-weight:700;text-decoration-thickness:1px;text-underline-offset:2px}
.rich-text a:hover{background:var(--amber)}
.rich-text code{padding:2px 4px;border:1px solid var(--line);background:var(--white);font:12px/1.45 var(--mono)}
.rich-text pre{max-width:100%;margin:12px 0;padding:12px;overflow:auto;border:1px solid var(--ink);background:var(--ink);color:var(--cream);white-space:pre;tab-size:2}
.rich-text pre code{padding:0;border:0;background:transparent;color:inherit;font-size:11px}
.rich-text table{display:block;max-width:100%;margin:12px 0;overflow-x:auto;border-collapse:collapse}
.rich-text th,.rich-text td{padding:7px 9px;border:1px solid var(--line);text-align:left;vertical-align:top}
.rich-text th{background:var(--amber);font:800 9px var(--mono)}
.rich-text hr{height:1px;margin:18px 0;border:0;background:var(--line)}
.response-output.is-streaming{white-space:pre-wrap}
.math-inline{white-space:nowrap}
.math-block{max-width:100%;margin:10px 0;overflow-x:auto;overflow-y:hidden;text-align:center}
.math-block-inline{display:block}
.rich-text .katex-display{margin:.4em 0}
.reasoning-panel{margin:9px 0 13px;border:1px solid var(--ink);background:rgba(170,139,245,.09);box-shadow:3px 3px 0 rgba(32,27,45,.12)}
.reasoning-panel summary{display:grid;grid-template-columns:26px minmax(0,1fr) auto 12px;align-items:center;gap:9px;min-height:43px;padding:8px 11px;cursor:pointer;list-style:none;font:800 9px var(--mono)}
.reasoning-panel summary::-webkit-details-marker{display:none}
.reasoning-panel summary::after{content:'+';font-size:14px;line-height:1}
.reasoning-panel[open] summary::after{content:'−'}
.reasoning-icon{display:grid;place-items:center;height:24px;border:1px solid var(--ink);background:var(--lavender);font:900 8px var(--mono)}
.reasoning-label{letter-spacing:.05em}
.reasoning-status{color:var(--muted);font:normal 700 8px var(--mono);white-space:nowrap}
.reasoning-panel[data-state="active"] .reasoning-icon{animation:reasoning-pulse .9s steps(2) infinite}
.reasoning-panel[data-state="active"] .reasoning-status{color:var(--coral-text)}
.reasoning-content{max-height:min(52vh,420px);padding:11px 13px 13px;overflow:auto;border-top:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.55}
.reasoning-content.is-streaming{white-space:pre-wrap}
.reasoning-content.rich-text h1,.reasoning-content.rich-text h2,.reasoning-content.rich-text h3{font-size:1em}
.thinking{display:flex;gap:4px;padding:9px 0}
.thinking i{width:7px;height:7px;background:var(--lavender);animation:blink .8s steps(2) infinite}
.thinking i:nth-child(2){animation-delay:.15s}.thinking i:nth-child(3){animation-delay:.3s}
.tool-call{margin:10px 0 13px;border:1px solid var(--ink);background:var(--white);box-shadow:3px 3px 0 rgba(32,27,45,.12)}
.tool-call summary{display:grid;grid-template-columns:26px 1fr auto;align-items:center;gap:9px;padding:9px 11px;cursor:pointer;list-style:none;font-size:10px;font-weight:800}
.tool-call summary::-webkit-details-marker{display:none}
.tool-call summary b{display:grid;place-items:center;height:24px;color:var(--ink);background:var(--sky);font:800 8px var(--mono)}
.tool-call summary em{color:var(--muted);font:normal 700 8px var(--mono)}
.tool-detail{padding:10px 12px 12px 46px;border-top:1px solid var(--line);color:var(--muted);font:9px/1.55 var(--mono);word-break:break-word}
.sources{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.sources a{max-width:100%;min-height:44px;padding:6px 10px;display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--cream);color:var(--ink);text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font:700 8px var(--mono)}
.sources a:hover{background:var(--sky);border-color:var(--ink)}
.composer-wrap{padding:10px clamp(12px,5vw,72px) max(12px,env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--paper)}
.attachment-tray{width:min(850px,100%);margin:0 auto 8px;display:flex;flex-wrap:wrap;gap:6px}
.attachment-tray[hidden]{display:none}
.attachment-chip{min-height:36px;max-width:100%;padding:6px 9px;border:1px solid var(--ink);background:var(--cream);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer;font:700 8px var(--mono)}
.attachment-chip:hover{background:var(--coral)}
.attachment-note{flex-basis:100%;color:var(--coral-text);font:700 8px/1.4 var(--mono)}
.composer{width:min(850px,100%);margin:0 auto;display:grid;grid-template-columns:52px minmax(0,1fr) 54px;align-items:end;border:2px solid var(--ink);background:var(--white);box-shadow:4px 4px 0 var(--lavender)}
.composer-attach{position:relative;overflow:hidden;display:grid;place-items:center;width:44px;height:44px;margin:0 0 5px 7px;border:2px solid var(--ink);background:var(--amber);box-shadow:2px 2px 0 var(--ink);cursor:pointer;font:900 18px var(--mono)}
.composer-attach input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}
.composer-attach:focus-within{outline:3px solid var(--sky);outline-offset:2px}
.composer textarea{width:100%;min-height:52px;max-height:150px;padding:15px;border:0;outline:0;resize:none;background:transparent;font-size:14px}
.composer button{width:44px;height:44px;margin:0 7px 5px 0;border:2px solid var(--ink);background:var(--coral);color:var(--ink);box-shadow:2px 2px 0 var(--ink);font:900 17px var(--mono)}
.composer button:disabled{cursor:wait;opacity:.5}
.composer-wrap>p{margin:7px 0 0;color:var(--muted);text-align:center;font:7px var(--mono)}
#mode-label{color:var(--coral-text);font-weight:800}
@keyframes blink{50%{opacity:.2}}
@keyframes reasoning-pulse{50%{background:var(--mint)}}
@media(max-width:760px){
  .chat-app{grid-template-columns:1fr}
  .side-panel{position:fixed;inset:0 auto 0 0;z-index:20;width:min(88vw,310px);transform:translateX(-105%);transition:transform .2s ease;box-shadow:8px 0 0 rgba(32,27,45,.22)}
  .side-panel.open{transform:none}
  .close-menu{display:block}
  .sidebar-scrim{position:fixed;inset:0;z-index:19;border:0;background:rgba(32,27,45,.5)}
  .sidebar-scrim.open{display:block}
  .chat-topbar{min-height:64px;padding:9px 11px;grid-template-columns:auto minmax(0,1fr) auto;gap:9px}
  .menu-button{display:block;min-width:44px;min-height:44px;padding:7px;border:1px solid var(--ink);background:var(--amber);font:800 8px var(--mono)}
  .top-title span{display:none}.top-title h1{font-size:17px}
  .runtime-state{display:none}
  .top-actions button{min-width:44px;padding:0 9px}
  .message-scroll{padding:18px 11px}
  .welcome{margin:5vh auto 15px}.welcome h2{font-size:38px}.welcome>p:not(.welcome-label){font-size:12px}
  .starter-grid{grid-template-columns:1fr}.starter-grid button{min-height:57px}.starter-grid b{margin-bottom:5px}
  .message{grid-template-columns:29px minmax(0,1fr);gap:9px;margin-bottom:21px}.message.user{grid-template-columns:minmax(0,1fr) 29px}
  .avatar{width:27px;height:27px}.message.user .message-body{width:96%;padding:11px 12px}.message-body{font-size:13px}
  .reasoning-panel summary{grid-template-columns:24px minmax(0,1fr) auto 10px;padding:7px 9px}.reasoning-status{font-size:7px}
  .tool-call summary{grid-template-columns:24px 1fr}.tool-call summary em{grid-column:2}.tool-detail{padding-left:10px}
  .composer-wrap{padding:9px 9px max(10px,env(safe-area-inset-bottom))}.composer-wrap>p{display:none}
  .composer{grid-template-columns:48px minmax(0,1fr) 52px}
  .composer textarea{min-height:48px;padding:13px}
}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}