:root{color-scheme:dark;--bg:#0b141a;--card:#171f26;--text:#e9edef;--muted:#9caeb8;--line:#34464f;--accent:#00a884}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,"Segoe UI",sans-serif}
header{max-width:1120px;margin:auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
a{color:#84ddc9;text-decoration:none}a:hover{text-decoration:underline}main{max-width:1120px;margin:16px auto 64px;padding:0 24px}
.eyebrow{font-size:12px;letter-spacing:.16em;color:#84ddc9;font-weight:700;margin-bottom:8px}
h1{font-size:clamp(30px,5vw,46px);letter-spacing:-.03em;line-height:1.15;margin:0 0 14px}h2{font-size:23px;margin:0 0 10px}h3{font-size:17px;margin:0 0 8px}
.intro{color:var(--muted);font-size:18px;margin:0 0 12px}#privateBrainStatus{color:var(--muted);min-height:25px;margin:0 0 30px}
#privateBrainRoot{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
section{min-width:0;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:25px}
section>p{color:var(--muted);margin:0 0 20px}form{display:grid;gap:12px;margin:0 0 16px}
input,textarea,select,button{font:inherit;border-radius:9px;border:1px solid var(--line)}input,textarea,select{width:100%;min-width:0;background:#0f1a21;color:var(--text);padding:12px}
.mateo-work,.mateo-chat{grid-column:1/-1}.mateo-work form,.mateo-chat form{max-width:720px}
.mateo-chat{grid-row:1}.mateo-chat details{color:var(--muted);margin-bottom:18px}.mateo-chat summary{cursor:pointer}
.mateo-work nav form{grid-template-columns:minmax(0,1fr) auto auto;align-items:start}.mateo-work nav button[type=button]{background:#203139;color:var(--text);border-color:var(--line);font-weight:400}
textarea{min-height:120px;resize:vertical}input::placeholder,textarea::placeholder{color:var(--muted)}
button{background:#203139;color:var(--text);cursor:pointer;padding:10px 13px;min-height:44px;margin:0 5px 8px 0}
form>button{background:var(--accent);color:#061e19;font-weight:750;border-color:var(--accent);margin:0}
button:hover:enabled{filter:brightness(1.15)}button:disabled{opacity:.5;cursor:default}
:focus-visible{outline:3px solid #85dfce;outline-offset:3px}
article{border-top:1px solid var(--line);padding-top:20px;margin-top:20px;overflow-wrap:anywhere}
blockquote{margin:12px 0;padding:4px 0 4px 15px;border-left:3px solid var(--accent);white-space:pre-wrap}
pre{font:inherit;white-space:pre-wrap;overflow-wrap:anywhere}section[hidden]{display:none}h4{margin:24px 0 10px}h5{font-size:15px;margin:18px 0 8px}
small{color:var(--muted);overflow-wrap:anywhere}[role=status]{overflow-wrap:anywhere}section [role=status]{margin:16px 0}
@media(max-width:740px){#privateBrainRoot{grid-template-columns:1fr}main{padding:0 16px;margin-top:8px}header{padding:16px}section{padding:20px}h1{font-size:34px}}
@media(max-width:600px){.mateo-work nav form{grid-template-columns:1fr 1fr}.mateo-work nav input{grid-column:1/-1}}
.personal-memory{grid-column:1/-1;grid-row:2}.personal-memory article>span{display:inline-block;font-size:13px;color:var(--muted);margin:0 0 10px}.personal-memory article>p{margin:10px 0 4px;color:var(--muted)}
.personal-memory details{margin:12px 0;color:var(--muted)}.personal-memory summary{cursor:pointer}.personal-memory form{margin-top:16px;padding:16px;border:1px solid var(--line);border-radius:12px;max-width:760px}.personal-memory label{display:grid;gap:8px}.personal-memory form p{margin:0;color:var(--muted)}

/* My Brain uses a document composer; keep its model choice ahead of the draft. */
.mateo-chat:not(.mateo-cobalt-chat) .mateo-model-controls{display:flex;align-items:center;flex-wrap:wrap;gap:6px 12px;min-width:0}
.mateo-chat:not(.mateo-cobalt-chat) .mateo-model-choice{flex:0 1 240px;width:auto;max-width:100%;min-height:44px;padding:8px 10px}
.mateo-chat:not(.mateo-cobalt-chat) .mateo-model-note{flex:1 1 180px;margin:0;color:var(--muted);font-size:13px;line-height:1.4}