:root{color-scheme:dark;--bg:#161616;--side:#0d0d0d;--pane:#111;--bubble:#2a2a2a;--ink:#e8e8e8;--muted:#9c9c9c;--line:#2b2b2b;--violet:#b8bafa;--magenta:#ff00ff;--red:#ef4444;--green:#22c55e;--orange:#fb923c;--cyan:#67e8f9;--topic:#b8a4d9;font:15px/1.6 -apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0}a{color:var(--violet);text-underline-offset:3px}button{font:inherit;cursor:pointer;color:inherit}code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}code{font-size:.92em;background:#262626;padding:1px 5px;border-radius:4px}pre{background:#0c0c0c;border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin:0 0 10px;font-size:12.5px;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere}pre code{background:none;padding:0;font-size:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--violet);outline-offset:3px}.chat:focus,.panel h2:focus{outline:none}.skip{position:absolute;left:12px;top:-80px;z-index:50;background:#222;padding:8px 12px;border-radius:6px}.skip:focus{top:12px}
.who,.js .conv-title{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.app{display:grid;grid-template-columns:236px minmax(0,1fr) 400px;min-height:100vh}.js .app:not(.pane-open){grid-template-columns:236px minmax(0,1fr)}.sidebar,.pane{align-self:start;position:sticky;top:0;height:100vh;overflow:auto}
.sidebar{background:var(--side);border-right:1px solid var(--line);padding:14px 12px 16px;display:flex;flex-direction:column;gap:12px;font-size:13.5px}.side-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--magenta);font:15px/1.3 Georgia,'Times New Roman',serif}.brand-mark{font-size:24px;line-height:1;color:var(--ink)}.menu-toggle{display:none;background:#222;border:1px solid #3a3a3a;border-radius:6px;padding:4px 10px;font-size:13px}
.demo-tag{margin:0;color:var(--muted);font-size:12px;line-height:1.5;padding:8px 10px;border:1px dashed #3a3a3a;border-radius:8px}.nav-label{margin:8px 0 4px;padding:0 10px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#7a7a7a}.sidebar ul{list-style:none;margin:0;padding:0}.sidebar li a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink);text-decoration:none}.sidebar li a:hover{background:#1b1b1b}.sidebar li a[aria-current=page],.sidebar li a[aria-current=true]{background:#242424}.chat-list small{display:block;color:var(--muted);font-size:11.5px;line-height:1.4;margin-top:2px}.side-foot{margin:auto 0 0;padding:10px 10px 0;color:#7a7a7a;font-size:11.5px;line-height:1.5;border-top:1px solid var(--line)}
.chat{display:flex;flex-direction:column;min-width:0}.chat-bar{position:sticky;top:0;z-index:5;background:rgba(22,22,22,.96);border-bottom:1px solid var(--line);padding:10px 22px 8px;display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px}.chat-head{display:flex;align-items:center;gap:10px}h1{font-size:15px;font-weight:600;margin:0}.badge{font-size:11px;color:var(--muted);border:1px solid #3a3a3a;border-radius:999px;padding:1px 8px;white-space:nowrap}
.focus{display:flex;flex-wrap:wrap;gap:4px;margin-left:auto}.focus button{background:transparent;border:1px solid transparent;border-radius:7px;padding:3px 9px;font-size:12.5px;color:var(--muted);transition:background .15s,color .15s}.focus button:hover{color:var(--ink)}.focus button[aria-pressed=true]{color:var(--ink);background:#2c2c2c;border-color:#444}.focus-note{width:100%;margin:0;font-size:12px;color:#7f7f7f}
.notice,.conversation,.composer-note{max-width:760px;width:100%;margin:0 auto}.notice{padding:14px 22px 0;font-size:12.5px;color:var(--muted)}.conversation{padding:18px 22px 40px;display:flex;flex-direction:column;gap:14px}.js .conversation{display:none}.js .conversation.active{display:flex}.conv-title{font-size:14px;color:var(--muted);margin:10px 0 0;font-weight:600}
.msg{position:relative}.msg.user{align-self:flex-end;max-width:min(78%,560px);background:var(--bubble);border-radius:18px;padding:9px 15px}.msg p{margin:0}.msg.assistant{padding:2px 0}.msg.assistant>p,.msg.assistant>.sec,.msg.assistant>.quote,.msg.assistant>pre{margin:0 0 10px}.msg.assistant>:last-child{margin-bottom:0}.sec p{margin:0 0 8px}.sec>:last-child{margin-bottom:0}
.act{margin:-5px 0;padding:1px 0 1px 12px;border-left:2px solid #2e2e2e;font:12.5px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;color:#8a8a8a}.act b{font-weight:500;color:#b3b3b3;margin-right:4px}.act i{font-style:normal;color:#6f6f6f;margin-left:8px}.flash{outline:2px solid var(--violet);outline-offset:4px}
.mk{background:none;border:0;padding:0;margin:0 .3em 0 0;font-size:2.07em;line-height:1;vertical-align:-.1em;display:inline-block;border-radius:6px}.mk:hover{filter:brightness(1.2)}.sec>.mk{display:block;margin:0 0 4px}
.quote{margin:0 0 8px;padding:2px 0 2px 12px;border-left:3px solid #4a4a4a;color:#bdbdbd;font-size:14.5px}.quote p{margin:0}.ctx{font-size:16px;text-decoration:none;margin-left:2px}.quote .preview{display:none;font-size:12px;color:#8f8f8f;margin-top:4px}.quote:hover .preview,.quote:focus-within .preview{display:block}
.msg.assistant .topic-reminder{color:var(--topic);font-size:1em;line-height:inherit;margin:14px 0 0;overflow-wrap:anywhere}.topic-colour{color:var(--topic)}
.c-red{color:var(--red)}.c-green{color:var(--green)}.c-orange{color:var(--orange)}.c-cyan{color:var(--cyan)}.skill{color:var(--magenta);font-family:Georgia,'Times New Roman',serif;font-style:normal}.open{text-decoration:none;font-size:1.05em}
.tbl{border-collapse:collapse;width:100%;font-size:13.5px;margin:2px 0 10px}.tbl th,.tbl td{text-align:left;padding:6px 10px;border-bottom:1px solid var(--line);vertical-align:top}.tbl th{color:var(--muted);font-weight:500;font-size:12px}[data-kind]{transition:opacity .2s}.dim{opacity:.22}
.composer-note{margin-top:auto;padding:12px 22px 22px;font-size:12.5px;color:var(--muted)}.composer-note p{margin:0;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#1b1b1b}
.pane{background:var(--pane);border-left:1px solid var(--line);font-size:13.5px}.js .pane{display:none}.js .app.pane-open .pane{display:block}.pane-bar{position:sticky;top:0;z-index:2;background:var(--pane);display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line);font-weight:600;font-size:13px}.pane-close{background:none;border:1px solid #3a3a3a;border-radius:6px;padding:2px 9px;font-size:14px;line-height:1.4}
.panel{padding:16px 18px 22px;border-bottom:1px solid var(--line)}.js .panel{display:none}.js .panel.active{display:block;border-bottom:0}.panel h2{font-size:15px;margin:0 0 8px}.panel p{margin:0 0 10px;color:#cfcfcf}.panel .small{font-size:12px;color:var(--muted)}.panel-mk{font-size:52px;line-height:1;margin:4px 0 10px}
.glossary{list-style:none;margin:0 0 10px;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:2px 10px}.glossary li{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:12.5px}.glossary .mk{font-size:26px;margin:0;width:36px;text-align:center;flex:none}.glossary .open-demo{width:36px;text-align:center;font-size:20px;flex:none;color:var(--violet)}
.legend{list-style:none;margin:0 0 10px;padding:0}.legend li{padding:5px 0;border-bottom:1px solid var(--line)}.legend b{font-weight:600}
.frame{border:1px solid #3a3a3a;border-radius:8px;overflow:hidden;background:#101010;margin:0 0 10px}.frame-cap{display:flex;justify-content:space-between;gap:8px;padding:6px 10px;font:11px/1.6 ui-monospace,Menlo,monospace;color:#b0b0b0;background:#1d1d1d}.frame-cap a{text-decoration:none;font-size:14px}.frame iframe{display:block;width:100%;height:520px;border:0}
details{font-size:12.5px;color:var(--muted);margin:0 0 10px}summary{cursor:pointer;font-weight:600;color:#cfcfcf}details p{margin:6px 0}.copy-row{display:flex;align-items:center;gap:10px;margin:-4px 0 12px;flex-wrap:wrap}.copy-row button{background:#222;border:1px solid #444;border-radius:6px;padding:4px 10px;font-size:12px}#copy-status{font-size:12px;color:var(--green)}
@media(max-width:1180px){.app{grid-template-columns:220px minmax(0,1fr) 340px}.js .app:not(.pane-open){grid-template-columns:220px minmax(0,1fr)}.frame iframe{height:440px}}
@media(max-width:900px){.app,.js .app:not(.pane-open){display:block}.sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:10px 14px;gap:10px}.menu-toggle{display:inline-block}.js #side-nav,.js .side-foot{display:none}.js .sidebar.open #side-nav,.js .sidebar.open .side-foot{display:block}.chat-bar{padding:8px 14px}.focus{margin-left:0}.notice,.conversation,.composer-note{padding-left:14px;padding-right:14px}.msg.user{max-width:88%}.js .app.pane-open .pane{position:fixed;inset:0;height:100vh;height:100dvh;z-index:30;border-left:0}.frame iframe{height:60vh}}
@media(max-width:480px){:root{font-size:14.5px}.mk{font-size:1.9em}.focus button{padding:3px 7px;font-size:12px}.glossary{grid-template-columns:1fr}.tbl{font-size:12.5px}.tbl th,.tbl td{padding:5px 6px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}

.sec>.mk{display:inline-flex;align-items:center;gap:8px}.sec>.mk::after{content:"⌄";transform:translateY(-3px);font:21px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--muted)}

.conversation .assistant u{text-decoration-line:underline;text-decoration-thickness:1px;text-underline-offset:.18em;text-decoration-skip-ink:auto;color:inherit}

/* Working commentary stays quiet; final replies retain the enlarged markers. */
.msg.assistant:not(.final) .mk{font-size:1em;vertical-align:baseline}
.msg.assistant:not(.final) .sec>.mk{gap:4px}
.msg.assistant:not(.final) .sec>.mk::after{font-size:1em;transform:none}