:root{--font-ui: "Sora", "Avenir Next", "Segoe UI", sans-serif;--font-copy: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;--bg-1: #f4f1e7;--bg-2: #d7dfef;--panel: #fdfcf8cc;--line: #bbc2ce;--ink-strong: #15171f;--ink-soft: #52586a;--accent: #0d7f5f;--accent-strong: #0b6e53;--bubble-user: #c9f2d4;--bubble-assistant: #f7f5ef;--bubble-failed: #ffe7df}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:var(--font-copy);color:var(--ink-strong);background:radial-gradient(circle at 5% 5%,#ffffff80,#fff0 35%),radial-gradient(circle at 95% 10%,#fff6,#fff0 40%),linear-gradient(145deg,var(--bg-1) 0%,var(--bg-2) 100%)}button,input,textarea{font:inherit}.chat-app{max-width:1100px;margin:0 auto;padding:20px;display:grid;gap:14px}.topbar{display:flex;align-items:flex-end;justify-content:space-between}.eyebrow{margin:0;font-family:var(--font-ui);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft)}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:var(--font-ui)}.presence{border:1px solid var(--line);border-radius:999px;padding:6px 10px;font-size:.85rem;background:#fff9;color:var(--ink-soft)}.presence.live{color:var(--accent-strong);border-color:#88c9b3;background:#e9fff6}.auth-card,.workspace,.debug-panel{border:1px solid var(--line);border-radius:18px;background:var(--panel);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 8px 24px #2b33431a}.auth-card{padding:16px;display:grid;gap:12px}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(180px,1fr));gap:10px}label{display:grid;gap:5px;font-size:.9rem;color:var(--ink-soft)}input,textarea{border:1px solid var(--line);border-radius:10px;padding:9px;background:#ffffffd9}button{border:0;border-radius:10px;padding:8px 12px;background:var(--accent);color:#f6fffb;cursor:pointer}button:hover{background:var(--accent-strong)}button.ghost{background:#ffffffa6;color:var(--ink-strong);border:1px solid var(--line)}.auth-actions{display:flex;gap:8px;flex-wrap:wrap}.workspace{display:grid;grid-template-columns:320px 1fr;min-height:68vh}.sidebar{border-right:1px solid var(--line);padding:14px;display:grid;gap:12px;align-content:start}.sidebar-head{display:flex;justify-content:space-between;align-items:center}.new-chat{display:grid;grid-template-columns:1fr auto;gap:8px}.conversation-list{list-style:none;margin:0;padding:0;display:grid;gap:7px}.conversation-item{border:1px solid var(--line);border-radius:10px;padding:9px;background:#ffffffad;cursor:pointer}.conversation-item.active{border-color:#85b8a6;background:#ebfff4}.conversation-item-title{font-family:var(--font-ui);font-size:.92rem}.conversation-item-meta{font-size:.8rem;color:var(--ink-soft)}.thread{display:grid;grid-template-rows:auto 1fr auto;min-height:0}.thread-head{padding:14px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.messages{padding:14px;overflow:auto;display:grid;gap:10px;align-content:start}.message{border:1px solid var(--line);border-radius:12px;padding:10px;max-width:min(76ch,90%)}.message.user{justify-self:end;background:var(--bubble-user)}.message.assistant,.message.system{justify-self:start;background:var(--bubble-assistant)}.message.failed{background:var(--bubble-failed)}.message-meta{margin-top:4px;color:var(--ink-soft);font-size:.76rem}.composer{border-top:1px solid var(--line);padding:14px;display:grid;grid-template-columns:1fr auto;gap:8px}.composer textarea{resize:vertical;min-height:48px;max-height:180px}.debug-panel{padding:10px}pre{margin:8px 0 0;max-height:240px;overflow:auto;padding:10px;border-radius:10px;border:1px solid var(--line);background:#1f2430;color:#dbe3f8}@media(max-width:860px){.field-grid,.workspace{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line)}}