:root{color-scheme:light dark;--bg:#f6f5f1;--panel:#fffefb;--ink:#272d29;--muted:#626c64;--line:#dedfd6;--accent:#315b46;font:16px/1.55 system-ui,sans-serif;background:var(--bg);color:var(--ink)}*{box-sizing:border-box}body{margin:0}header{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 32px}.brand{font-size:22px;font-weight:650;color:inherit;text-decoration:none}.brand span{color:var(--muted);font-weight:400}button,a.primary{font:inherit;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:7px;padding:9px 15px;cursor:pointer;text-decoration:none}button:hover{border-color:var(--accent)}button:disabled{opacity:.45;cursor:default}.primary,a.primary{background:var(--accent);color:#fff;border-color:var(--accent)}[hidden]{display:none!important}#workspace{display:grid;grid-template-columns:270px 1fr;min-height:calc(100dvh - 76px)}aside{padding:24px 16px;border-right:1px solid var(--line)}aside>button{width:100%}nav{display:flex;flex-direction:column;gap:7px;margin-top:24px}nav button{text-align:left;overflow-wrap:anywhere;background:transparent;border-color:transparent}nav button[aria-current=true]{background:var(--panel);border-color:var(--line)}main{width:100%;max-width:970px;margin:auto;padding:32px 40px;align-self:start}.chat-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}h1{font-size:25px;line-height:1.25;margin:0}#meta{color:var(--muted);font-size:14px;margin:8px 0}#messages{min-height:30vh;margin:32px 0 48px}.message{margin:24px 0;animation:appear .18s ease}.message h2{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 8px}.message p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0}.message.user{background:var(--panel);border:1px solid var(--line);padding:18px 22px;border-radius:9px}.message small{color:var(--muted)}#composer{position:sticky;bottom:0;background:var(--bg);padding:12px 0}#composer>label{font-size:13px;color:var(--muted)}textarea{display:block;resize:vertical;width:100%;min-height:90px;max-height:280px;padding:14px;font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:9px}textarea:focus{outline:2px solid var(--accent);outline-offset:2px}.composer-actions{display:flex;align-items:center;gap:10px;margin-top:10px}#activity{flex:1;color:var(--muted);font-size:13px}#login{max-width:700px;margin:15vh auto;padding:30px}#login h1{font-size:44px}#login p{color:var(--muted);margin-bottom:32px}dialog{color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:28px;width:min(440px,90vw)}dialog::backdrop{background:#12251d66}dialog h2{margin-top:0}fieldset{border:1px solid var(--line);border-radius:6px;margin:20px 0}fieldset label{display:block;padding:6px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px}#error{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:var(--panel);border:1px solid #a65742;padding:14px 20px;border-radius:8px;width:min(600px,90vw);box-shadow:0 4px 24px #0002;z-index:5}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}@keyframes appear{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}@media(max-width:700px){header{padding:0 18px;height:64px}#workspace{grid-template-columns:1fr}aside{border-right:0;border-bottom:1px solid var(--line);padding:16px}nav{flex-direction:row;overflow:auto;margin-top:12px}nav button{min-width:140px;max-width:200px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}main{padding:24px 18px}.chat-heading{align-items:start}#delete{font-size:12px;padding:7px}h1{font-size:22px}}@media(prefers-color-scheme:dark){:root{--bg:#191f1c;--panel:#222a25;--ink:#e4e7df;--muted:#a8b3a9;--line:#39483e;--accent:#47785d}}