:root{--bg:#0e1a14;--panel:#15251d;--bubble-me:#2f6b4f;--bubble:#1f2f27;--ink:#eef3ef;--mute:#8fa39a;--line:#233529;--accent:#5fd39a}
*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:16px/1.4 -apple-system,BlinkMacSystemFont,"SF Pro Text",Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
#app{height:100%;display:flex;flex-direction:column;max-width:720px;margin:0 auto}
header{display:flex;align-items:center;gap:12px;padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0}
header h1{font-size:17px;margin:0;flex:1;font-weight:600}
button{font:inherit;border:0;border-radius:10px;padding:10px 14px;background:var(--accent);color:#08140d;font-weight:600;cursor:pointer}
button.ghost{background:transparent;color:var(--accent);padding:6px 8px}
input,textarea{font:inherit;width:100%;padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--panel);color:var(--ink);outline:none}
input:focus,textarea:focus{border-color:var(--accent)}
.screen{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.center{justify-content:center;align-items:stretch;max-width:380px;margin:0 auto;width:100%}
.brand{font-size:30px;font-weight:700;letter-spacing:-.02em;margin:0 0 4px}
.sub{color:var(--mute);margin:0 0 12px}
.chat{display:flex;align-items:center;gap:12px;padding:12px;border-radius:14px;background:var(--panel);cursor:pointer}
.chat:active{opacity:.7}.avatar{width:44px;height:44px;border-radius:50%;background:var(--bubble-me);display:grid;place-items:center;font-weight:700}
.chat .name{font-weight:600}.chat .last{color:var(--mute);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.thread{flex:1;overflow:auto;padding:12px;display:flex;flex-direction:column;gap:6px}
.msg{max-width:78%;padding:9px 12px;border-radius:16px;background:var(--bubble);white-space:pre-wrap;word-break:break-word;align-self:flex-start;position:relative}
.msg.me{background:var(--bubble-me);align-self:flex-end;border-bottom-right-radius:4px}.msg:not(.me){border-bottom-left-radius:4px}
.msg .meta{font-size:11px;color:rgba(255,255,255,.65);text-align:right;margin-top:2px}
.msg .meta .r{color:#8ef}
.composer{display:flex;gap:8px;padding:8px 10px calc(env(safe-area-inset-bottom) + 8px);background:var(--panel);border-top:1px solid var(--line)}
.composer textarea{resize:none;max-height:120px;border-radius:20px;padding:10px 14px}
.composer button{border-radius:50%;width:44px;height:44px;padding:0;flex:none}
.empty{color:var(--mute);text-align:center;margin:auto}
.err{color:#ff8a80}.hint{color:var(--mute);font-size:13px}