:root{
  --bg:#080C14;--panel:#111B2B;--panel2:#16233a;--accent:#176BFF;--accent2:#42B9FF;
  --text:#E9F0FA;--muted:#8492A8;--line:rgba(132,146,168,.22);--bubble-in:#16233a;--bubble-out:#176BFF;--bubble-out-text:#fff;
  --danger:#ff5d6c;--ok:#35d49a;--warn:#ffb84a;--radius:16px;--focus:#42B9FF;
  --font:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--head:"Space Grotesk",Inter,system-ui,sans-serif;
}
:root[data-theme="light"]{
  --bg:#F4F7FC;--panel:#FFFFFF;--panel2:#EAF0FA;--accent:#0B58DB;--accent2:#0A7BC4;
  --text:#0E1726;--muted:#566377;--line:rgba(14,23,38,.14);--bubble-in:#EAF0FA;--bubble-out:#0B58DB;--bubble-out-text:#fff;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
#app{height:100%;display:flex;position:relative;overflow:hidden}
h1,h2,h3{font-family:var(--head);margin:0}
.muted{color:var(--muted)}.small{font-size:.82rem}.row{display:flex;align-items:center;gap:10px}.grow{flex:1;min-width:0}
.btn{padding:11px 18px;border-radius:12px;background:var(--accent);color:#fff;font-weight:600;min-height:44px}
.btn.ghost{background:var(--panel2);color:var(--text)}.btn.danger{background:var(--danger);color:#fff}.btn.sm{padding:6px 12px;min-height:34px;font-size:.88rem;border-radius:10px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-size:1.15rem}
.icon:hover{background:var(--panel2)}
input[type=text],input[type=email],input[type=tel],input[type=datetime-local],input[type=date],input[type=time],select,textarea{
  width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:11px 13px;min-height:44px}
label.f{display:block;margin:12px 0 4px;font-size:.85rem;color:var(--muted)}
.av{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#fff;flex:none;font-family:var(--head)}
.av.sm{width:30px;height:30px;font-size:.8rem}
/* onboarding */
.onb{margin:auto;width:min(440px,100%);padding:28px 22px;display:flex;flex-direction:column;gap:14px;min-height:100%;justify-content:center}
.logo{width:72px;height:72px;border-radius:22px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;font-family:var(--head);font-weight:700;font-size:2rem;color:#fff}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.dots{display:flex;gap:6px}.dots i{height:4px;flex:1;border-radius:2px;background:var(--line)}.dots i.on{background:var(--accent)}
.tog{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.tog:last-child{border:0}
.sw{width:46px;height:28px;border-radius:14px;background:var(--line);position:relative;flex:none;transition:.15s}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:.15s}
.sw[aria-checked=true]{background:var(--accent)}.sw[aria-checked=true]::after{left:21px}
/* layout */
.side{width:100%;max-width:400px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:var(--bg);min-height:0}
.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg);min-height:0}
.bar{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line);background:var(--panel)}
.list{overflow:auto;flex:1}
.conv{display:flex;gap:12px;padding:12px 14px;width:100%;text-align:left;align-items:center;border-bottom:1px solid var(--line)}
.conv:hover,.conv.sel{background:var(--panel)}
.badge{min-width:22px;height:22px;border-radius:11px;background:var(--accent);color:#fff;font-size:.75rem;display:grid;place-items:center;padding:0 6px;font-weight:700}
.tabs{display:flex;gap:6px;padding:8px 12px;overflow:auto}
.tab{padding:6px 14px;border-radius:20px;background:var(--panel);border:1px solid var(--line);font-size:.88rem;white-space:nowrap}
.tab.on{background:var(--accent);border-color:var(--accent);color:#fff}
.nav{display:flex;border-top:1px solid var(--line);background:var(--panel)}
.nav button{flex:1;padding:10px 4px;font-size:.78rem;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:2px}
.nav button.on{color:var(--accent2)}
.nav b{font-size:1.2rem;font-weight:400}
.empty{margin:auto;text-align:center;padding:30px;color:var(--muted);max-width:340px}
/* chat */
.msgs{flex:1;overflow:auto;padding:14px 12px;display:flex;flex-direction:column;gap:4px}
.m{max-width:min(78%,520px);padding:8px 12px;border-radius:16px;background:var(--bubble-in);align-self:flex-start;word-wrap:break-word;overflow-wrap:anywhere;position:relative}
.m.me{background:var(--bubble-out);color:var(--bubble-out-text);align-self:flex-end}
.m .who{font-size:.76rem;font-weight:700;color:var(--accent2);margin-bottom:2px}
.m .meta{font-size:.7rem;opacity:.75;margin-top:3px;display:flex;gap:6px;justify-content:flex-end;align-items:center}
.m.del{font-style:italic;opacity:.7}
.quote{border-left:3px solid var(--accent2);padding:2px 8px;margin-bottom:5px;font-size:.82rem;opacity:.85;background:rgba(0,0,0,.12);border-radius:6px}
.rx{display:flex;gap:4px;flex-wrap:wrap;margin-top:4px}.rx span{background:rgba(255,255,255,.14);border:1px solid var(--line);border-radius:12px;padding:1px 7px;font-size:.78rem}
.sys{align-self:center;font-size:.76rem;color:var(--muted);background:var(--panel);padding:3px 10px;border-radius:10px;margin:6px 0}
.day{align-self:center;font-size:.74rem;color:var(--muted);margin:8px 0}
.composer{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line);background:var(--panel);align-items:flex-end}
.composer textarea{resize:none;max-height:120px;min-height:44px;border-radius:22px}
.replybar{padding:6px 12px;background:var(--panel2);font-size:.85rem;display:flex;gap:8px;align-items:center;border-top:1px solid var(--line)}
.banner{padding:7px 12px;font-size:.84rem;text-align:center;background:var(--warn);color:#2a1d00}
.obj{background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:14px;padding:12px;margin:4px 0;width:min(100%,430px);align-self:center}
.obj h3{font-size:1rem;margin-bottom:6px}.obj .tag{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent2);font-weight:700}
.opt{position:relative;display:flex;justify-content:space-between;padding:9px 11px;border:1px solid var(--line);border-radius:10px;margin:6px 0;overflow:hidden;width:100%;text-align:left}
.opt i{position:absolute;left:0;top:0;bottom:0;background:rgba(23,107,255,.28);z-index:0}
.opt span{position:relative;z-index:1}.opt.mine{border-color:var(--accent2)}
.ai{border:1px solid var(--accent2);background:linear-gradient(180deg,rgba(66,185,255,.10),transparent);color:var(--text)}
/* sheet / modal */
#modal{position:fixed;inset:0;z-index:50;display:none;align-items:flex-end;justify-content:center;background:rgba(0,0,0,.55)}
#modal.on{display:flex}
.sheet{background:var(--panel);width:min(560px,100%);max-height:88vh;overflow:auto;border-radius:20px 20px 0 0;padding:18px;border:1px solid var(--line)}
@media(min-width:700px){#modal{align-items:center}.sheet{border-radius:20px}}
.sheet h2{margin-bottom:10px;font-size:1.2rem}.acts{display:flex;gap:8px;justify-content:flex-end;margin-top:16px;flex-wrap:wrap}
.menu button{display:block;width:100%;text-align:left;padding:13px 6px;border-bottom:1px solid var(--line)}
.menu button.danger{color:var(--danger)}
#toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--panel2);border:1px solid var(--line);padding:10px 16px;border-radius:12px;z-index:60;display:none;max-width:90%}
.call{position:fixed;inset:0;z-index:55;background:#05080e;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.call video{width:100%;max-height:60vh;background:#000;object-fit:cover}
.sec{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:14px 14px 6px}
.item{display:flex;gap:12px;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line);width:100%;text-align:left}
.back{display:none}
@media(max-width:760px){
  .side{max-width:none}
  .back{display:grid}
  body.inchat .side,body.insettings .side{display:none}
  body:not(.inchat):not(.insettings) .main{display:none}
}
.hide{display:none!important}
.chip{display:inline-block;font-size:.72rem;padding:2px 8px;border-radius:10px;background:var(--panel2);border:1px solid var(--line)}