:root{
  --bg:#0b0f14; --bg2:#0e131a;
  --panel:#141b24; --panel2:#1b2530; --line:#26313f; --line2:#324153;
  --txt:#eaf1f8; --muted:#8595a8; --faint:#5d6b7c;
  --accent:#34e0a1; --accent-d:#1fb87f; --accent-ink:#062017;
  --amber:#f5b651; --danger:#fb7185; --danger-d:#e2536b;
  --radius:16px; --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--bg); color:var(--txt);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15px; line-height:1.55; letter-spacing:-.01em;
  min-height:100vh; position:relative;
}
.glow{position:fixed; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(900px 380px at 18% -8%, rgba(52,224,161,.13), transparent 70%),
    radial-gradient(700px 320px at 100% 0%, rgba(80,140,255,.08), transparent 70%);}
header,nav,main,.console,.sessionbar{position:relative; z-index:1}

h1{font-size:19px; margin:0; font-weight:800; letter-spacing:-.02em}
h2{font-size:18px; margin:0 0 4px; font-weight:700; letter-spacing:-.02em}
.sub-h{margin-top:26px; font-size:15px}
.muted{color:var(--muted)} .accent{color:var(--accent)}
.hint{color:var(--muted); font-size:13px; margin:4px 0 16px}
.hint b{color:var(--txt)}
code{background:var(--panel2); padding:1px 6px; border-radius:6px; font-size:13px; font-family:"JetBrains Mono",monospace}

/* topbar */
.topbar{display:flex; align-items:center; padding:18px 22px 6px; max-width:920px; margin:0 auto}
.brand{display:flex; align-items:center; gap:13px}
.logo{width:42px; height:42px; border-radius:12px; display:grid; place-items:center;
  font-weight:800; font-size:15px; color:var(--accent-ink);
  background:linear-gradient(135deg,var(--accent),var(--accent-d)); box-shadow:0 6px 18px rgba(52,224,161,.25)}
.sub{margin:1px 0 0; font-size:12px; color:var(--muted)}

/* session switcher */
.sessionbar{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; max-width:920px; margin:14px auto 4px; padding:0 18px}
.session-card{background:var(--panel); border:1px solid var(--line); border-radius:14px; padding:12px 14px; cursor:pointer; transition:.15s}
.session-card:hover{border-color:var(--line2)}
.session-card.active{border-color:var(--accent); box-shadow:0 0 0 1px var(--accent), 0 8px 22px rgba(52,224,161,.12); background:linear-gradient(180deg,rgba(52,224,161,.06),transparent)}
.sc-top{display:flex; align-items:center; gap:8px; font-size:13px}
.sc-num{margin-top:5px; font-family:"JetBrains Mono",monospace; font-size:12px; color:var(--muted)}
.dot{width:9px; height:9px; border-radius:50%; background:var(--faint); flex:none; transition:.2s}
.dot.on{background:var(--accent); box-shadow:0 0 0 4px rgba(52,224,161,.18)}
.dot.wait{background:var(--amber); box-shadow:0 0 0 4px rgba(245,182,81,.16)}
.dot.off{background:var(--danger)}

/* tabs */
.tabs{display:flex; gap:4px; flex-wrap:wrap; max-width:920px; margin:14px auto 0; padding:0 18px}
.tab{background:transparent; border:none; color:var(--muted); padding:9px 13px; cursor:pointer;
  border-radius:10px; font-size:13.5px; font-weight:600; transition:.15s}
.tab:hover{color:var(--txt); background:var(--panel)}
.tab.active{color:var(--accent-ink); background:var(--accent)}

main{max-width:920px; margin:0 auto; padding:16px 18px 8px}
.panel{display:none; background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:24px; box-shadow:var(--shadow)}
.panel.active{display:block; animation:fade .22s ease}
@keyframes fade{from{opacity:0; transform:translateY(6px)} to{opacity:1}}

label{display:block; font-size:13px; font-weight:600; margin:16px 0 7px; color:#cdd8e4}
input[type=text],input[type=number],input[type=datetime-local],textarea,select{
  width:100%; background:var(--bg2); border:1px solid var(--line); color:var(--txt);
  border-radius:11px; padding:11px 13px; font-size:14px; font-family:inherit; transition:.15s}
textarea{resize:vertical}
input:focus,textarea:focus,select:focus{outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(52,224,161,.13)}
input[type=file]{padding:9px; color:var(--muted)}
::placeholder{color:var(--faint)}
.check{display:flex; align-items:center; gap:9px; font-weight:500; cursor:pointer; margin:13px 0 0; color:#cdd8e4}
.check input{width:auto; accent-color:var(--accent); width:17px; height:17px}
.big-check{font-size:15px}

.btn{border:1px solid var(--line2); background:var(--panel2); color:var(--txt);
  padding:11px 17px; border-radius:11px; cursor:pointer; font-size:14px; font-weight:600; font-family:inherit; transition:.15s}
.btn:hover{border-color:var(--muted); transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-d)); border-color:transparent; color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.danger{background:var(--danger); border-color:transparent; color:#2a0a10}
.btn.danger:hover{background:var(--danger-d)}
.btn.big{width:100%; padding:14px; margin-top:20px; font-size:15px}
.btn:disabled{opacity:.5; cursor:not-allowed; transform:none}

.row{display:flex; align-items:center}
.row.between{justify-content:space-between}
.row.wrap{flex-wrap:wrap; gap:12px}
.row.gap{gap:18px; flex-wrap:wrap; align-items:flex-end}
.actions{display:flex; gap:8px; flex-wrap:wrap}
.delay{flex:1; min-width:170px} .delay label{margin-top:0}

.qr-wrap{display:flex; justify-content:center; align-items:center; min-height:300px;
  background:var(--bg2); border-radius:14px; border:1px dashed var(--line2); margin:14px 0}
.qr-wrap img{border-radius:12px; background:#fff; padding:12px}

.grouplist{display:grid; gap:9px; margin-top:10px; max-height:440px; overflow:auto}
.gitem{display:flex; align-items:center; gap:12px; padding:12px 14px; background:var(--bg2);
  border:1px solid var(--line); border-radius:12px; cursor:pointer; transition:.12s}
.gitem:hover{border-color:var(--line2)}
.gitem.sel{border-color:var(--accent); background:linear-gradient(180deg,rgba(52,224,161,.07),transparent)}
.gitem input{accent-color:var(--accent); width:17px; height:17px}
.gavatar{width:38px; height:38px; border-radius:10px; flex:none; display:grid; place-items:center;
  background:var(--panel2); color:var(--muted); font-weight:700; font-size:15px;
  background-size:cover; background-position:center; border:1px solid var(--line2); overflow:hidden}
.gavatar.has-photo{color:transparent; border-color:var(--accent)}
.gitem .gname{flex:1; font-weight:600}
.gitem .gcount{font-size:12px; color:var(--muted); font-family:"JetBrains Mono",monospace}

.seg{display:flex; gap:4px; background:var(--bg2); padding:5px; border-radius:13px; border:1px solid var(--line); margin:6px 0}
.segbtn{flex:1; background:none; border:none; color:var(--muted); padding:10px; border-radius:9px; cursor:pointer; font-size:13px; font-weight:600; font-family:inherit; transition:.12s}
.segbtn:hover{color:var(--txt)}
.segbtn.active{background:var(--panel2); color:var(--txt); box-shadow:0 2px 8px rgba(0,0,0,.2)}
.hidden{display:none!important}

.progress{margin-top:16px; font-size:13px; font-family:"JetBrains Mono",monospace; color:var(--muted)}
.pbar{height:10px; background:var(--bg2); border:1px solid var(--line); border-radius:99px; overflow:hidden}
.pfill{height:100%; width:0%; border-radius:99px; background:linear-gradient(90deg,var(--accent-d),var(--accent)); transition:width .3s ease}
.pmsg{margin:8px 0 6px; color:var(--txt); font-weight:600}
.prow{display:flex; align-items:center; justify-content:space-between; gap:12px; margin:8px 0 6px}
.prow .pmsg{margin:0}
.pstop{padding:7px 14px; font-size:13px}
.plog{max-height:220px; overflow:auto}
.plog div{padding:2px 0}
.progress .ok{color:var(--accent)} .progress .err{color:var(--danger)}
hr.div{border:none; border-top:1px solid var(--line); margin:26px 0 4px}
.poll-card{background:var(--bg2); border:1px solid var(--line); border-radius:12px; padding:16px 16px 6px; margin-bottom:10px}
.poll-head{margin-bottom:12px}
.poll-head b{font-size:15px}
.poll-opt{margin-bottom:12px}
.poll-opt-top{display:flex; justify-content:space-between; font-size:13px; margin-bottom:5px; color:#cdd8e4}

#createResult,#adminResult{margin-top:14px; display:grid; gap:6px}
.rline{font-size:13px; padding:9px 12px; border-radius:9px; background:var(--bg2); border:1px solid var(--line)}
.rline.yes{border-color:var(--accent)} .rline.no{border-color:var(--danger)}

.console{max-width:920px; margin:16px auto 36px; padding:0 18px}
.console-head{font-size:11px; text-transform:uppercase; letter-spacing:1.5px; color:var(--faint); margin-bottom:7px}
.logbox{background:#070a0e; border:1px solid var(--line); border-radius:12px; padding:13px;
  height:160px; overflow:auto; font-family:"JetBrains Mono",monospace; font-size:12px; color:#9fb3c8}
.logbox div{padding:1px 0}

@media(max-width:560px){
  .sessionbar{grid-template-columns:1fr 1fr 1fr; gap:7px; padding:0 14px}
  .session-card{padding:10px}
  .sc-top b{font-size:12px}
  .panel{padding:18px}
}