:root{--bg:#0f0f0f;--panel:#171717;--panel-soft:#1f1f1f;--panel-alt:#212121;--border:#2c2c2c;--text:#ececec;--text-soft:#b7b7b7;--accent:#10a37f;--accent-hover:#0e8f70;--error:#ff6b6b}*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%}body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.page{flex-direction:column;gap:28px;width:min(1100px,100%);margin:0 auto;padding:40px 24px 64px;display:flex}.nav{justify-content:space-between;align-items:center;gap:20px;display:flex}.brand{font-size:16px;font-weight:700}.nav-links{color:var(--text-soft);gap:14px;font-size:14px;display:flex}.nav-links a:hover,.sidebar-links a:hover{color:var(--text)}.hero{flex-direction:column;gap:14px;display:flex}.hero h1{font-size:clamp(30px,6vw,44px);line-height:1.15}.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:#9aa0a6;font-size:11px}.subhead,.muted{color:var(--text-soft)}.actions{align-items:center;gap:10px;display:flex}.button{border:1px solid var(--border);background:var(--panel);color:var(--text);cursor:pointer;border-radius:999px;padding:10px 16px;font-size:14px;font-weight:600;transition:background-color .2s,border-color .2s}.button:hover{border-color:#3a3a3a}.button.primary{background:var(--accent);color:#fff;border-color:#0000}.button.primary:hover{background:var(--accent-hover)}.button.primary:disabled{opacity:.65;cursor:not-allowed}.button.secondary{background:0 0}.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;display:grid}.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:10px;padding:18px;display:flex}.text-link{color:#9ad6c8;font-weight:600}.chat-layout{background:var(--bg);grid-template-columns:260px minmax(0,1fr);min-height:100vh;display:grid}.chat-sidebar{border-right:1px solid var(--border);background:#111;flex-direction:column;gap:16px;padding:20px;display:flex}.sidebar-new-chat{border-radius:12px;justify-content:flex-start;width:100%}.sidebar-links{color:var(--text-soft);flex-direction:column;gap:6px;font-size:14px;display:flex}.sidebar-links a{border-radius:10px;padding:10px 12px}.sidebar-links a:hover{background:var(--panel)}.chat-main{grid-template-rows:auto minmax(0,1fr) auto;gap:16px;min-height:100vh;padding:20px 24px 24px;display:grid}.chat-topbar{border-bottom:1px solid var(--border);padding-bottom:12px}.chat-topbar h1{font-size:24px;line-height:1.2}.chat-window{flex-direction:column;gap:14px;width:100%;max-width:840px;margin:0 auto;padding:8px 0 24px;display:flex;overflow-y:auto}.empty-state{background:var(--panel);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:8px;margin:auto 0;padding:20px;display:flex}.empty-state h2{font-size:24px;line-height:1.2}.message-row{border:1px solid var(--border);background:var(--panel);white-space:pre-wrap;border-radius:12px;flex-direction:column;gap:8px;max-width:100%;padding:14px 16px;display:flex}.message-row.user{background:#1d1d1d}.message-role{text-transform:uppercase;letter-spacing:.12em;color:var(--text-soft);font-size:12px}.message-content{font-size:15px}.loading{color:#a5d9cc;padding:0 2px;font-size:14px}.composer-panel{background:0 0;flex-direction:column;gap:10px;width:100%;max-width:840px;margin:0 auto;display:flex}.composer-controls{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.field-group{color:var(--text-soft);flex-direction:column;gap:6px;font-size:13px;display:flex}.input,.textarea{border:1px solid var(--border);background:var(--panel-alt);color:var(--text);border-radius:10px;font-size:14px}.input{min-width:min(420px,80vw);padding:10px 12px}.chat-form{border:1px solid var(--border);background:var(--panel);border-radius:18px;flex-direction:column;gap:10px;padding:12px;display:flex}.textarea{resize:vertical;width:100%;min-height:110px;padding:12px 14px}.checkbox{color:var(--text-soft);align-items:center;gap:8px;font-size:13px;display:flex}.checkbox input{accent-color:var(--accent)}.error{color:var(--error);font-size:13px}@media (max-width:960px){.chat-layout{grid-template-columns:1fr}.chat-sidebar{border-right:0;border-bottom:1px solid var(--border)}.sidebar-new-chat{width:fit-content}.sidebar-links{flex-flow:wrap}.chat-main{min-height:auto}}@media (max-width:720px){.page{padding:28px 16px 44px}.nav{flex-direction:column;align-items:flex-start}.chat-main{padding:16px}.input{min-width:100%}.actions{justify-content:flex-end}}