:root{--bg: #fff;--ink: #171b24;--muted: #535d73;--line: #e4e8f0;--blue: #2945f5;--surface: #f8f9fc;--error: #8f2435;--error-bg: #fff5f6;--serif: Georgia, "Times New Roman", serif;--radius: 8px;--column: 800px}*{box-sizing:border-box}html,body{margin:0;height:100%;color:var(--ink);background:var(--bg);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea{font:inherit}button{cursor:pointer;color:var(--ink)}button:disabled{cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline:2px solid var(--blue);outline-offset:4px}a{color:var(--blue);text-underline-offset:4px}p,h1,h2,h3{margin:0}.app{display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:100vh;height:100dvh}.topbar{display:flex;align-items:center;gap:24px;padding:8px 32px;min-height:64px;border-bottom:1px solid var(--line)}.identity{display:flex;align-items:center;gap:12px}.brandmark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:4px;background:var(--ink);color:#fff;font-size:12px}.brandname{font:600 20px var(--serif);white-space:nowrap}.session{flex:1;padding-left:24px;border-left:1px solid var(--line);color:var(--muted);font-size:14px}.session select{font:inherit;color:var(--ink);border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);min-height:36px;max-width:min(240px,35vw)}.text-button{min-height:44px;padding:8px 12px;border:1px solid transparent;border-radius:var(--radius);background:transparent;font-size:14px}#chat-scroll{overflow-y:auto;overscroll-behavior:contain;min-height:0}.conversation{width:min(var(--column),calc(100% - 32px));margin-inline:auto;padding:32px 0}.intro{padding-bottom:24px;margin-bottom:24px;border-bottom:1px solid var(--line)}.eyebrow{display:block;color:var(--muted);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}h1{font:400 clamp(28px,3vw,36px)/1.25 var(--serif);letter-spacing:-.025em}.intro p{color:var(--muted);margin-top:8px}.message{margin-bottom:32px}.role{margin-bottom:12px;font-size:14px;font-weight:600}.assistant>.role{color:var(--blue)}.user{padding:16px 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.user .role{margin-bottom:8px}.user-text{white-space:pre-wrap;overflow-wrap:anywhere}.message-body{overflow-wrap:anywhere}.message-body>*+*{margin-top:16px}.message-body h1,.message-body h2,.empty h2{font:400 22px/1.4 var(--serif)}.message-body h3{font-size:16px}.message-body ul,.message-body ol{padding-left:24px}.message-body li+li{margin-top:8px}.message-body pre{overflow-x:auto;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.message-body table{display:block;overflow-x:auto;max-width:100%;border-collapse:collapse;font-size:14px}.message-body th,.message-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}.message-body th{background:var(--surface)}.response-tools{display:flex;align-items:center;gap:8px;margin-top:12px}.response-tools button{color:var(--muted);padding-left:0}.sources{border-top:1px solid var(--line);padding-top:16px}.sources ol{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:12px}.source-link{display:flex;gap:12px;text-decoration:none;min-height:44px;align-items:center}.source-number,.domain{color:var(--muted);font-size:14px}.source-label{display:grid}.activity{margin-top:16px;border-top:1px solid var(--line);padding-top:8px;font-size:14px}summary{cursor:pointer;min-height:44px;color:var(--muted);padding-block:8px}.activity ol{list-style:none;padding:0;margin:8px 0 12px;display:grid;gap:8px}.step{display:flex;align-items:center;justify-content:space-between;gap:16px}.step-name{overflow-wrap:anywhere}.step-status{color:var(--muted);flex-shrink:0}.detail-note{color:var(--muted);font-size:14px}.working-heading{font-weight:500}.failure{padding:24px;background:var(--error-bg);border:1px solid #edd5db;border-radius:var(--radius)}.failure .failure-heading{color:var(--error);font:600 16px/1.5 system-ui}.failure p{margin:8px 0 16px}.failure .details{margin-top:12px;border-top:1px solid #edd5db;padding-top:4px}.diagnostics{display:grid;grid-template-columns:100px minmax(0,1fr);gap:8px 16px;font-size:14px}.diagnostics dt{color:var(--muted)}.diagnostics dd{margin:0;overflow-wrap:anywhere}code{font:14px ui-monospace,SFMono-Regular,Consolas,monospace}.outline-button{min-height:44px;padding:8px 16px;border:1px solid var(--line);background:#fff;border-radius:var(--radius)}.composer-area{border-top:1px solid var(--line);background:var(--bg);padding:16px 16px max(16px,env(safe-area-inset-bottom))}.composer-inner{width:min(var(--column),100%);margin-inline:auto}.stations{display:flex;gap:4px;margin-bottom:8px}.stations [aria-pressed=true]{border-color:var(--line);background:var(--surface);font-weight:600}.stations button:disabled{color:var(--muted)}.composer{border:1px solid #ccd3e0;border-radius:var(--radius);background:var(--surface);padding:12px 16px}.composer:focus-within{border-color:var(--blue)}.composer label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}textarea{display:block;width:100%;background:transparent;color:var(--ink);border:0;padding:0;resize:none;min-height:48px;max-height:128px;line-height:1.5}textarea::placeholder{color:var(--muted)}.composer-bottom{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-top:8px}.keyboard-guide{font-size:12px;color:var(--muted)}kbd{font:inherit}.send{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px 16px;background:var(--blue);color:#fff;border:0;border-radius:6px;font-size:14px;font-weight:600}.send:disabled{color:var(--muted);background:var(--line)}.composer-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding-top:8px;color:var(--muted);font-size:12px}.empty{padding-block:32px}.empty-start{display:grid;gap:12px;margin-top:32px}.starter{display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;border:0;border-bottom:1px solid var(--line);background:none;padding:16px 0;min-height:56px}.empty-hint{margin-top:24px;color:var(--muted);font-size:14px}dialog{color:var(--ink);font:inherit;border:0;padding:0;background:var(--bg)}dialog::backdrop{background:#171b2438}.notes-dialog{position:fixed;margin:0 0 0 auto;inset-block:0;width:min(420px,100%);max-width:100%;height:100dvh;max-height:100dvh;box-shadow:-8px 0 32px #171b2414}.drawer-content{display:flex;flex-direction:column;height:100%}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--line)}.drawer-header h2{font:400 24px var(--serif)}.drawer-header{gap:8px;flex-wrap:wrap}.drawer-body{padding:24px;overflow-y:auto;flex:1}.drawer-body p{color:var(--muted);margin-bottom:24px}.drawer-body label{font-size:14px}#note-input{margin-top:12px;padding:12px;border:1px solid var(--line);min-height:300px;max-height:none}.drawer-foot{padding:16px 24px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.confirm-dialog,.copy-dialog{width:min(600px,calc(100% - 32px));border-radius:var(--radius);padding:24px}.confirm-dialog h2,.copy-dialog h2{font:400 24px var(--serif);margin-bottom:12px}.actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px;margin-top:24px}#token-input{display:block;width:100%;margin-top:8px;min-height:44px;padding:8px 12px;font:inherit;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--ink)}.copy-dialog textarea{margin:16px 0;min-height:200px;border:1px solid var(--line);padding:12px}.skip{position:fixed;top:8px;left:8px;background:#fff;padding:8px 16px;z-index:10;transform:translateY(-150%)}.skip:focus{transform:translateY(0)}[hidden]{display:none!important}.course-dialog{width:min(960px,calc(100% - 24px));height:min(92dvh,1000px);max-height:92dvh;border-radius:var(--radius)}.course-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-block:16px}.course-toolbar select{max-width:100%;min-height:44px;font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--ink)}.course-output{overflow-wrap:anywhere}.course-output pre{overflow:auto;max-height:500px;padding:16px;background:var(--surface);border:1px solid var(--line);font-size:13px}#course-input{border:1px solid var(--line);padding:12px;min-height:140px;max-height:400px;resize:vertical;margin-top:8px}#course-status{font-size:14px}@media(hover:hover){.text-button:hover,.outline-button:hover{background:var(--surface);border-color:var(--line)}a:hover{color:#1830c0;text-decoration:underline}.send:not(:disabled):hover{background:#1830c0}.starter:hover{color:var(--blue)}}@media(min-width:1440px){.conversation{padding-top:48px}}@media(max-width:767px){.topbar{display:grid;grid-template-columns:1fr auto;padding:8px 16px;gap:0 8px}.brandname{font-size:18px}.session{padding-left:0;border:0;font-size:12px;text-align:right}.topbar .text-button{padding-inline:8px}#new-chat{justify-self:start}#open-notes{justify-self:end}.conversation{padding-top:24px}.user,.failure{padding:16px}.notes-dialog{inset:auto 0 0;margin:0;width:100%;height:min(82dvh,720px);border-radius:12px 12px 0 0}.composer-area{padding-top:12px}.composer-meta{justify-content:center}.composer-meta>span:last-child{display:none}}