:root{
  --bg:#0A0E13; --surface:#131A22; --surfaceAlt:#1B242E; --border:#26313D;
  --fg:#EAF0F6; --dim:#8593A2; --accent:#35D0A5; --accentText:#04140C;
  --warn:#E0A64E; --danger:#FF6B6B; --bubbleMe:#17614A;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --lock:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2304140c' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M8 10V8a4 4 0 018 0v2'/%3E%3Crect x='6' y='10.5' width='12' height='9' rx='2.2'/%3E%3C/svg%3E");
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:#05080a;color:var(--fg);font-family:var(--sans);-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer;border:none;border-radius:11px;padding:12px 16px;font-weight:600;color:var(--fg);background:var(--surfaceAlt)}
button.primary{background:var(--accent);color:var(--accentText)}
button.ghost{background:transparent;color:var(--accent);border:1px solid var(--border)}
button.danger{background:transparent;color:var(--danger);border:1px solid var(--danger)}
button:disabled{opacity:.5}
button.icon{width:40px;height:40px;padding:0;border-radius:50%;font-size:20px;line-height:1;background:transparent;color:var(--dim)}
button.icon:hover{background:var(--surfaceAlt);color:var(--fg)}
input{font:inherit;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:11px;color:var(--fg);padding:13px 14px;outline:none}
input:focus{border-color:var(--accent)}
label{color:var(--dim);font-size:13px;font-weight:600;display:block;margin-bottom:6px}
.blk{display:inline-block;width:30px;height:30px;border-radius:8px;background:var(--accent) var(--lock) center/18px no-repeat;flex-shrink:0}
.blk.big{width:60px;height:60px;border-radius:16px;background-size:36px}

#app{height:100dvh;max-width:1180px;margin:0 auto;background:var(--bg);
  border-left:1px solid var(--border);border-right:1px solid var(--border);overflow:hidden}

/* ---- auth ---- */
.auth{height:100%;overflow:auto;display:flex;align-items:center;justify-content:center;padding:24px}
.authbox{width:100%;max-width:400px}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.brand h1{font-size:26px;font-weight:800;color:#eafff7}
.tag{color:var(--dim);font-size:14px;margin-bottom:22px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:12px}
.note{color:var(--dim);font-size:12px;line-height:1.5}
.or{color:var(--dim);text-align:center;margin:16px 0;font-size:13px}

/* ---- two-pane shell ---- */
.wa{display:flex;height:100%}
.side{width:360px;flex-shrink:0;border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}
.main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;background:
  radial-gradient(1100px 500px at 70% -10%, rgba(53,208,165,.05), transparent 60%),var(--bg)}

.side-hd{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 14px;border-bottom:1px solid var(--border);background:var(--surface)}
.me{display:flex;align-items:center;gap:11px;min-width:0}
.meinfo{min-width:0}
.mename{font-weight:700;font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mesub{color:var(--accent);font-size:12px}
.hd-actions{display:flex;gap:2px;flex-shrink:0}
.av{width:44px;height:44px;border-radius:50%;background:var(--surfaceAlt);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;flex-shrink:0}
.av.lg{width:42px;height:42px}

/* list */
.list{flex:1;overflow-y:auto;min-height:0}
.row{display:flex;align-items:center;gap:12px;padding:11px 14px;cursor:pointer;border-bottom:1px solid rgba(255,255,255,.03)}
.row:hover{background:var(--surface)}
.row.active{background:var(--surfaceAlt)}
.rmid{flex:1;min-width:0}
.rname{font-weight:600}
.rprev{color:var(--dim);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rend{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.rtime{color:var(--dim);font-size:11px}
.pill{font-size:10px;font-weight:700;border:1px solid;border-radius:999px;padding:2px 8px}
.pill.v{color:var(--accent);border-color:var(--accent)}
.pill.b{color:var(--warn);border-color:var(--warn)}
.empty{color:var(--dim);text-align:center;padding:50px 26px;line-height:1.7}

/* chat pane */
.welcome-pane{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:40px;color:var(--dim)}
.welcome-pane h2{color:var(--fg);font-weight:800;font-size:22px}
.welcome-pane p{font-size:14px;line-height:1.6}
.chat-hd{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface)}
.chat-hd .back{display:none}
.chtitle{font-weight:700;font-size:17px}
.banner{background:var(--surfaceAlt);color:var(--dim);font-size:12px;text-align:center;padding:8px 12px;border-bottom:1px solid var(--border)}
.msgs{flex:1;overflow-y:auto;min-height:0;padding:16px;display:flex;flex-direction:column;gap:8px}
.brow{display:flex}
.brow.me{justify-content:flex-end}
.bub{max-width:72%;padding:8px 12px 6px;border-radius:14px;background:var(--surfaceAlt);word-break:break-word;white-space:pre-wrap;font-size:15px}
.brow.me .bub{background:var(--bubbleMe);border-bottom-right-radius:4px}
.brow.them .bub{border-bottom-left-radius:4px}
.bub .meta{display:block;color:rgba(234,240,246,.5);font-size:10.5px;margin-top:3px;text-align:right}
.imsg{max-width:240px;border-radius:10px;display:block;margin-bottom:2px}
.file{color:var(--fg);text-decoration:none}
.composer{display:flex;align-items:center;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--surface)}
.composer input{flex:1}
.attach{width:42px;height:42px;border-radius:50%;background:var(--surfaceAlt);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:24px;cursor:pointer;flex-shrink:0}

/* overlay / sheet */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:20;padding:16px}
.sheet{background:var(--surface);border:1px solid var(--border);border-radius:18px;width:100%;max-width:440px;padding:22px;display:flex;flex-direction:column;gap:12px;max-height:86vh;overflow:auto}
.sheet h3{font-size:19px}
.muted{color:var(--dim);font-size:14px}
.bullets{list-style:none;display:flex;flex-direction:column;gap:10px}
.bullets li{color:var(--fg);font-size:14px;line-height:1.5;padding-left:22px;position:relative}
.bullets li::before{content:"›";position:absolute;left:4px;color:var(--accent);font-weight:800}
.bullets li.warn{color:var(--warn)}
.bullets li.warn::before{content:"!";color:var(--warn)}
.results{display:flex;flex-direction:column;gap:4px}
.res{display:flex;justify-content:space-between;align-items:center;padding:12px;border-radius:11px;background:var(--surfaceAlt);cursor:pointer}
.res b{color:var(--accent);font-size:13px}

/* ---- mobile: single pane ---- */
@media(max-width:819px){
  #app{border:none;max-width:none}
  .side{width:100%}
  .main{display:none}
  .wa.chat-open .side{display:none}
  .wa.chat-open .main{display:flex}
  .chat-hd .back{display:flex}
  .bub{max-width:82%}
}