:root{--bg:#0f1115;--panel:#171a21;--line:#262b36;--text:#e6e8ee;--dim:#8b93a5;--accent:#6ea8fe;--user:#1f3a63;--err:#ff7b7b}
*{box-sizing:border-box}
html,body{height:100%;margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
[hidden]{display:none!important}
#login{display:flex;height:100%;align-items:center;justify-content:center;padding:16px}
#loginForm{width:100%;max-width:340px;display:flex;flex-direction:column;gap:12px}
h1{margin:0 0 8px;font-size:1.4rem}
input,select,textarea,button{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
button{background:var(--accent);color:#06101f;border:0;font-weight:600;cursor:pointer}
button.ghost{background:transparent;color:var(--dim);border:1px solid var(--line);font-weight:400}
button:disabled{opacity:.5}
.err{color:var(--err);min-height:1.2em;margin:0;font-size:.9rem}
#app{display:flex;flex-direction:column;height:100%;height:100dvh}
header{display:flex;gap:8px;padding:10px 12px;padding-top:max(10px,env(safe-area-inset-top));border-bottom:1px solid var(--line)}
header select{flex:1;min-width:0}
main{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;-webkit-overflow-scrolling:touch}
.m{max-width:92%;padding:9px 13px;border-radius:14px;white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere}
.m.user{align-self:flex-end;background:var(--user);border-bottom-right-radius:4px}
.m.bot{align-self:flex-start;background:var(--panel);border:1px solid var(--line);border-bottom-left-radius:4px}
.m.bot.live::after{content:"▍";color:var(--accent);animation:b 1s steps(2) infinite}
.tool{align-self:flex-start;font:.8rem ui-monospace,Menlo,monospace;color:var(--dim);padding:2px 6px;max-width:92%;overflow-wrap:anywhere}
.m.sys{align-self:center;color:var(--err);font-size:.9rem}
@keyframes b{to{visibility:hidden}}
#chatForm{display:flex;gap:8px;padding:10px 12px;padding-bottom:max(10px,env(safe-area-inset-bottom));border-top:1px solid var(--line);align-items:flex-end}
#msg{flex:1;resize:none;max-height:40vh;min-width:0}