:root{--bg:#0a0e1a;--bg2:#0e1426;--surface:#121930;--surface2:#1a2342;--line:rgba(255,255,255,.08);--text:#e8ecf6;--muted:#8b95b0;--accent:#7c8cff;--accent2:#5568ee;--ok:#34d399;--danger:#f87171}
*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
body{min-height:100vh;min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:20px;color:var(--text);
  background:radial-gradient(60% 50% at 85% 0%,rgba(124,140,255,.20),transparent),radial-gradient(50% 40% at 0% 100%,rgba(52,211,153,.10),transparent),var(--bg)}
button{cursor:pointer;color:inherit}
.app{position:relative;width:100%;max-width:680px;height:min(90vh,860px);height:min(90dvh,860px);display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,var(--surface),var(--bg2));border:1px solid var(--line);border-radius:22px;box-shadow:0 24px 60px rgba(0,0,0,.55)}

/* topo */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(10,14,26,.35)}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.logo{width:38px;height:38px;flex:none;display:grid;place-items:center;border-radius:12px;font-weight:800;font-size:1.1rem;color:#fff;background:linear-gradient(135deg,var(--accent),#b57cff);box-shadow:0 4px 14px rgba(124,140,255,.4)}
.brand-text h1{font-size:1rem;font-weight:700;letter-spacing:.2px}
.brand-text p{font-size:.72rem;color:var(--muted);margin-top:1px}
.pill{display:flex;align-items:center;gap:8px;min-height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);font-size:.8rem;font-weight:600;transition:background .2s,border-color .2s}
.pill:not(:disabled):hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.18)}
.pill:disabled{cursor:default;opacity:.7}
.pill[aria-expanded=true] .chev{transform:rotate(180deg)}
.chev{transition:transform .2s}
.dot{width:8px;height:8px;border-radius:50%;background:var(--danger)}
.dot.online{background:var(--ok);box-shadow:0 0 0 3px rgba(52,211,153,.2),0 0 10px var(--ok)}

/* entrada */
.setup{flex:1;overflow-y:auto;padding:26px 20px;display:flex}
.setup-inner{width:100%;max-width:400px;margin:auto;display:flex;flex-direction:column;gap:16px;text-align:center}
.hero-icon{width:64px;height:64px;margin:0 auto;display:grid;place-items:center;border-radius:20px;color:var(--accent);background:rgba(124,140,255,.12);border:1px solid rgba(124,140,255,.3)}
.setup h2{font-size:1.45rem;font-weight:750;letter-spacing:-.2px}
.setup p{font-size:.9rem;color:var(--muted);line-height:1.5}
.chips{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.chips li{font-size:.72rem;padding:6px 11px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--muted)}
.chips li::before{content:"";display:inline-block;width:6px;height:6px;margin-right:7px;border-radius:50%;background:var(--ok)}
.field{display:flex;flex-direction:column;gap:6px;text-align:left}
.field span{font-size:.75rem;font-weight:600;color:var(--muted)}
.input{width:100%;min-height:46px;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--bg);color:var(--text);font-size:16px;outline:none;transition:border-color .2s,box-shadow .2s}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,140,255,.2)}
.btn{min-height:46px;padding:0 18px;border:0;border-radius:12px;font-size:.92rem;font-weight:650;transition:transform .1s,filter .2s,background .2s}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{width:100%;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.btn-primary:not(:disabled):hover{filter:brightness(1.1)}
.btn-ghost{flex:none;background:rgba(255,255,255,.07);border:1px solid var(--line)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.error{color:var(--danger)!important;font-size:.82rem!important}
.share{display:flex;flex-direction:column;gap:12px;text-align:left;padding:14px;border-radius:16px;background:var(--bg2);border:1px solid rgba(52,211,153,.3)}
.share-label{font-size:.75rem;line-height:1.4;color:var(--ok);font-weight:600}
.link-box{display:flex;gap:8px}

/* chat */
.chat{flex:1;min-height:0;display:flex;flex-direction:column}
.messages{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:18px 16px;display:flex;flex-direction:column;gap:10px;scroll-behavior:smooth}
.messages::-webkit-scrollbar{width:6px}
.messages::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:6px}
.message{--c:#7c8cff;max-width:82%;padding:9px 13px 10px;border-radius:16px;font-size:.92rem;line-height:1.45;word-break:break-word;
  background:color-mix(in srgb,var(--c) 13%,var(--surface2));border:1px solid color-mix(in srgb,var(--c) 38%,transparent);animation:pop .18s ease-out}
.message.me{align-self:flex-end;border-bottom-right-radius:5px}
.message.peer{align-self:flex-start;border-bottom-left-radius:5px}
.message.dm{border-style:dashed}
.message-header{display:flex;align-items:center;gap:8px;margin-bottom:3px;font-size:.74rem}
.sender{padding:0;border:0;background:none;font:inherit;font-weight:700;color:var(--c)}
button.sender:hover{text-decoration:underline}
.tag{font-size:.64rem;padding:1px 8px;border-radius:999px;border:1px dashed var(--c);color:var(--c);white-space:nowrap}
.timestamp{margin-left:auto;padding-left:10px;color:var(--c);opacity:.75;font-variant-numeric:tabular-nums}
.message.sys{align-self:center;max-width:100%;padding:2px 10px;background:none;border:0;color:var(--muted);font-size:.76rem;text-align:center;animation:none}
.message.sys.warn{color:var(--danger)}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.composer{padding:10px 12px calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:rgba(10,14,26,.45)}
.target-bar{display:flex;align-items:center;gap:8px;margin-bottom:8px;padding:6px 6px 6px 12px;border-radius:12px;border:1px dashed var(--accent);background:rgba(124,140,255,.12);font-size:.8rem;color:var(--accent)}
.target-bar span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.composer-row{display:flex;gap:8px;align-items:center}
.input-pill{flex:1;border-radius:999px;padding:12px 18px}
.composer.dm .input-pill{border-color:var(--accent)}
.send{width:46px;height:46px;flex:none;display:grid;place-items:center;border:0;border-radius:50%;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));transition:transform .1s,filter .2s}
.send:hover{filter:brightness(1.12)}.send:active{transform:scale(.94)}.send:disabled{opacity:.4;cursor:not-allowed}
.input:disabled{opacity:.5}
.icon-btn{width:30px;height:30px;flex:none;border:0;border-radius:50%;background:rgba(255,255,255,.06);font-size:1.1rem;line-height:1;color:inherit}
.icon-btn:hover{background:rgba(255,255,255,.14)}

/* participantes */
.backdrop{position:absolute;inset:0;z-index:10;background:transparent}
.users-panel{position:absolute;z-index:20;top:66px;right:12px;width:310px;max-height:65%;display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface2);border:1px solid rgba(255,255,255,.12);border-radius:18px;box-shadow:0 20px 50px rgba(0,0,0,.6);animation:pop .15s ease-out}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--line)}
.panel-head h3{font-size:.9rem}
.panel-head h3 span{color:var(--muted);font-weight:500;margin-left:4px}
.users-list{list-style:none;overflow-y:auto;padding:6px}
.users-list li{--c:#7c8cff;display:flex;align-items:center;gap:11px;padding:8px;border-radius:12px}
.users-list li:hover{background:rgba(255,255,255,.04)}
.avatar{width:36px;height:36px;flex:none;display:grid;place-items:center;border-radius:50%;font-weight:700;color:var(--c);background:color-mix(in srgb,var(--c) 22%,transparent);border:1.5px solid var(--c)}
.u-name{flex:1;min-width:0;font-size:.88rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{margin-left:6px;font-size:.62rem;font-weight:600;padding:2px 7px;border-radius:999px;background:rgba(255,255,255,.08);color:var(--muted)}
.dm-btn{flex:none;min-height:36px;padding:0 13px;border-radius:999px;border:1px solid rgba(124,140,255,.5);background:rgba(124,140,255,.12);color:var(--accent);font-size:.76rem;font-weight:650}
.dm-btn:hover{background:rgba(124,140,255,.25)}
.panel-note{padding:10px 14px;border-top:1px solid var(--line);font-size:.7rem;line-height:1.4;color:var(--muted)}

/* celular */
@media (max-width:640px){
  body{padding:0;align-items:stretch}
  .app{max-width:none;height:100vh;height:100dvh;border:0;border-radius:0;box-shadow:none}
  .topbar{padding-top:calc(12px + env(safe-area-inset-top))}
  .message{max-width:88%}
  .backdrop{position:fixed;background:rgba(0,0,0,.6)}
  .users-panel{position:fixed;top:auto;left:0;right:0;bottom:0;width:auto;max-height:75vh;max-height:75dvh;border-radius:22px 22px 0 0;border-bottom:0;padding-bottom:env(safe-area-inset-bottom)}
  .users-panel::before{content:"";display:block;width:40px;height:4px;margin:8px auto 0;border-radius:4px;background:rgba(255,255,255,.2)}
  .dm-btn{min-height:40px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* v3 */
.logo{font-size:.95rem;letter-spacing:-.5px}
.me-chip{--c:#7c8cff;margin-left:auto;display:flex;align-items:center;gap:8px;min-width:0;font-size:.82rem;font-weight:650;color:var(--c)}
#me-name{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.avatar.sm{width:28px;height:28px;font-size:.78rem}
.brand-text p.idle{color:#fbbf24;font-weight:600;font-variant-numeric:tabular-nums}
.attach{width:46px;height:46px;flex:none;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--muted)}
.attach:hover{background:rgba(255,255,255,.12);color:var(--text)}.attach:disabled{opacity:.4;cursor:not-allowed}
.message img.photo{display:block;max-width:min(100%,320px);max-height:300px;margin-top:4px;border-radius:10px;cursor:zoom-in}
.lightbox{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:16px;background:rgba(0,0,0,.9);cursor:zoom-out}
.lightbox img{max-width:100%;max-height:100%;border-radius:10px}
@media (max-width:640px){#me-name{max-width:72px}.input-pill{padding:12px 14px}}