:root{
  --opt-a:#e21b3c; --opt-b:#1368ce; --opt-c:#caa102; --opt-d:#22863a;
  --ok:#16a34a; --bad:#dc2626; --radius:16px; --maxw:1100px;
  --font:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}
html[data-theme="dark"]{
  --bg:#0b1220; --bg2:#0f172a; --card:#172033; --card2:#1f2b43;
  --text:#e8eefc; --muted:#9fb0cc; --border:#2a3855; --shadow:0 10px 40px rgba(0,0,0,.45);
  --header:#0e1726; --chip:#1e2a44; --accent:#6aa6ff; --accent2:#7c5cff;
  --grad:radial-gradient(1200px 600px at 80% -10%,#1b2a4d 0%,transparent 60%),radial-gradient(900px 500px at -10% 110%,#221a45 0%,transparent 55%),#0b1220;
}
html[data-theme="light"]{
  --bg:#eef2fb; --bg2:#f6f8fe; --card:#ffffff; --card2:#f1f5fd;
  --text:#101828; --muted:#5a6782; --border:#dbe3f3; --shadow:0 10px 30px rgba(20,40,90,.12);
  --header:#ffffff; --chip:#eaf0fc; --accent:#1f5fe0; --accent2:#7c5cff;
  --grad:radial-gradient(1100px 600px at 85% -10%,#dbe7ff 0%,transparent 60%),radial-gradient(900px 500px at -10% 110%,#e7defc 0%,transparent 55%),#eef2fb;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:var(--font);color:var(--text);background:var(--grad);background-attachment:fixed;min-height:100dvh;-webkit-text-size-adjust:100%;line-height:1.45}
button{font-family:inherit}
.hidden{display:none!important}

header.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:12px;flex-wrap:wrap;row-gap:8px;
  padding:10px clamp(12px,3vw,28px);padding-left:max(clamp(12px,3vw,28px),env(safe-area-inset-left));padding-right:max(clamp(12px,3vw,28px),env(safe-area-inset-right));
  background:color-mix(in srgb,var(--header) 86%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px;min-width:0;cursor:pointer}
.brand .dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 0 14px var(--accent);flex:0 0 auto}
.brand .t{font-size:16px;line-height:1.05;min-width:0;overflow:hidden;text-overflow:ellipsis}
.spacer{flex:1}
.hpill{display:flex;align-items:center;gap:8px;background:var(--chip);border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-weight:700;font-size:13px}
.hpill b{font-variant-numeric:tabular-nums;letter-spacing:2px}
.iconbtn{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--text);cursor:pointer;font-size:18px;transition:.15s;flex:0 0 auto}
.iconbtn:hover{border-color:var(--accent);transform:translateY(-1px)}
.dropdown{position:absolute;right:0;top:48px;background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);min-width:200px;padding:8px;z-index:40}
.dropdown .du{padding:8px 10px;border-bottom:1px solid var(--border);margin-bottom:6px}
.dropdown .du b{display:block}.dropdown .du span{font-size:12px;color:var(--muted)}
.dropdown button{display:block;width:100%;text-align:left;background:transparent;border:none;color:var(--text);padding:9px 10px;border-radius:8px;cursor:pointer;font-weight:600;font-size:14px}
.dropdown button:hover{background:var(--card2)}

main{max-width:var(--maxw);margin:0 auto;padding:clamp(14px,3vw,30px);padding-bottom:max(clamp(14px,3vw,30px),env(safe-area-inset-bottom))}
.view{animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(18px,3vw,30px)}
h1,h2,h3{margin:0 0 .4em}
h1{font-size:clamp(22px,3.4vw,34px)}
.lead{color:var(--muted);font-size:15px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:820px){.grid2{grid-template-columns:1fr}}

.btn{cursor:pointer;border:1px solid var(--border);background:var(--card2);color:var(--text);padding:13px 20px;border-radius:12px;font-weight:700;font-size:15px;transition:.15s;display:inline-flex;align-items:center;gap:9px;justify-content:center}
.btn:hover{transform:translateY(-1px);border-color:var(--accent)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:#fff;box-shadow:0 8px 24px color-mix(in srgb,var(--accent) 45%,transparent)}
.btn.primary:disabled{background:var(--card2);color:var(--muted);border:1px solid var(--border);box-shadow:none;opacity:1}
.btn.ghost{background:transparent}.btn.big{font-size:18px;padding:16px 26px}.btn.wide{width:100%}.btn.sm{padding:8px 13px;font-size:13px}
label.fld{display:block;font-weight:700;font-size:13px;margin:14px 0 6px;color:var(--muted)}
input[type=text],input[type=email],input[type=password],input[type=number],select{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--bg2);color:var(--text);font-size:15px;font-family:inherit}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
:where(.btn,.chip,.role,.opt.tappable,.iconbtn,[tabindex="0"]):focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:12px}
.help{font-size:12.5px;color:var(--muted);margin-top:6px}
.err{color:var(--bad);font-size:13px;margin-top:8px;font-weight:600}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--chip);border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:12.5px;font-weight:700;cursor:pointer;user-select:none}
.chip.on{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-color:transparent}
.divider{height:1px;background:var(--border);margin:18px 0}
.note{background:var(--card2);border:1px dashed var(--border);border-radius:12px;padding:12px 14px;font-size:13px;color:var(--muted)}
kbd{background:var(--chip);border:1px solid var(--border);border-radius:6px;padding:1px 7px;font-weight:700;font-size:12px}

/* roles / landing */
.roles{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:6px}
@media(max-width:680px){.roles{grid-template-columns:1fr}}
.role{cursor:pointer;border:1.5px solid var(--border);border-radius:var(--radius);padding:24px;background:var(--card2);transition:.15s;text-align:center}
.role:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:var(--shadow)}
.role .emo{font-size:42px}.role h3{margin:10px 0 4px;font-size:20px}.role p{margin:0;color:var(--muted);font-size:13.5px}

/* tabs */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px;border-bottom:1px solid var(--border);padding-bottom:8px}
.tab{padding:9px 14px;border-radius:10px;border:1px solid transparent;background:transparent;color:var(--muted);font-weight:700;cursor:pointer;font-size:14px}
.tab.on{background:var(--card2);color:var(--text);border-color:var(--border)}

/* stat cards */
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:6px 0 4px}
.stat{background:var(--card2);border:1px solid var(--border);border-radius:14px;padding:16px}
.stat .v{font-size:30px;font-weight:900;font-variant-numeric:tabular-nums}
.stat .l{color:var(--muted);font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:.3px;margin-top:2px}
.stat.good .v{color:var(--ok)}.stat.bad .v{color:var(--bad)}.stat.acc .v{color:var(--accent)}

/* tabla */
.tablewrap{overflow:auto;border:1px solid var(--border);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:10px 12px;text-align:left;white-space:nowrap}
th{background:var(--card2);color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.3px;position:sticky;top:0}
tbody tr{border-top:1px solid var(--border)}
tbody tr:hover{background:var(--card2)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.pillrole{font-size:11px;font-weight:800;padding:2px 8px;border-radius:999px;background:var(--chip);border:1px solid var(--border)}
.bar{height:8px;border-radius:999px;background:var(--card2);overflow:hidden;min-width:80px;border:1px solid var(--border)}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--bad),#f59e0b,var(--ok))}

/* lobby / qr */
.pinwrap{text-align:center}
.pin{font-size:clamp(40px,9vw,84px);font-weight:900;letter-spacing:.12em;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.joinurl{font-size:13px;color:var(--muted);word-break:break-all;margin-top:8px}
#qrbox{background:#fff;padding:14px;border-radius:14px;display:inline-block;box-shadow:var(--shadow)}
#qrbox img,#qrbox canvas{display:block}
.players{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.player{background:var(--chip);border:1px solid var(--border);border-radius:999px;padding:7px 13px;font-weight:700;font-size:13.5px;animation:pop .25s ease}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:scale(1);opacity:1}}
.countbig{font-size:40px;font-weight:900;font-variant-numeric:tabular-nums}

/* pregunta */
.qmeta{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.qtag{font-size:12px;font-weight:800;letter-spacing:.3px;text-transform:uppercase;color:var(--muted);background:var(--chip);border:1px solid var(--border);padding:5px 11px;border-radius:999px}
.qcount{margin-left:auto;font-weight:800;color:var(--muted);font-variant-numeric:tabular-nums}
.directive{display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:10px;font-weight:800;font-size:14px}
.directive.incorrecta,.directive.no{background:color-mix(in srgb,var(--bad) 16%,transparent);color:var(--bad);border:1px solid color-mix(in srgb,var(--bad) 45%,transparent)}
.directive.correcta{background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok);border:1px solid color-mix(in srgb,var(--ok) 45%,transparent)}
.qtext{font-size:clamp(19px,2.7vw,30px);font-weight:800;margin:6px 0 4px}
.qsub{color:var(--muted);font-size:14px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;margin-bottom:2px}
.timerbar{height:12px;border-radius:999px;background:var(--card2);overflow:hidden;margin:14px 0 4px;border:1px solid var(--border)}
.timerbar>i{display:block;height:100%;background:linear-gradient(90deg,var(--ok),#86efac);transition:width .25s linear,background .3s}
.timermeta{display:flex;justify-content:space-between;font-weight:800;color:var(--muted);font-size:14px;font-variant-numeric:tabular-nums}
.options{display:grid;grid-template-columns:1fr;gap:12px;margin-top:18px}
.opt{position:relative;display:flex;align-items:stretch;border-radius:14px;overflow:hidden;border:1px solid transparent;background:var(--card2);text-align:left;width:100%;cursor:default;transition:.18s;color:var(--text)}
.opt .badge{flex:0 0 64px;display:grid;place-items:center;color:#fff;font-weight:900;font-size:26px}
.opt .otext{padding:14px 16px;font-size:clamp(15px,1.7vw,18px);font-weight:600;display:flex;align-items:center;flex:1}
.opt[data-k="0"] .badge{background:var(--opt-a)}.opt[data-k="1"] .badge{background:var(--opt-b)}
.opt[data-k="2"] .badge{background:var(--opt-c)}.opt[data-k="3"] .badge{background:var(--opt-d)}
.opt .tally{position:absolute;right:12px;top:14px;font-weight:900;font-size:18px;font-variant-numeric:tabular-nums;background:color-mix(in srgb,var(--text) 12%,var(--card));color:var(--text);padding:3px 12px;border-radius:999px;border:1px solid var(--border)}
.opt:has(.tally) .otext{padding-right:104px}
.opt.tappable{cursor:pointer}.opt.tappable:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.opt.chosen{outline:3px solid var(--accent);outline-offset:1px}
.opt.correct{border-color:var(--ok);box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 70%,transparent) inset,0 8px 24px color-mix(in srgb,var(--ok) 30%,transparent)}
.opt.correct .otext{background:color-mix(in srgb,var(--ok) 18%,var(--card2))}
.opt.correct .otext::after{content:"✓";margin-left:auto;color:var(--ok);font-weight:900;font-size:22px;padding-left:10px}
.opt.wrong{background:color-mix(in srgb,var(--card2) 88%,var(--muted))}
.opt.wrong .otext{color:var(--muted)}.opt.wrong .badge{filter:grayscale(.5);opacity:.7}
.opt.wrong:not(.mychoice):not(.correct) .otext::after{content:"—";margin-left:auto;color:var(--muted);font-weight:900;font-size:22px;padding-left:10px}
.opt.mychoice.wrong{border-color:var(--bad);box-shadow:0 0 0 3px color-mix(in srgb,var(--bad) 65%,transparent) inset}
.opt.mychoice.wrong .otext{background:color-mix(in srgb,var(--bad) 16%,var(--card2));color:var(--text)}
.opt.mychoice.wrong .otext::after{content:"✗";margin-left:auto;color:var(--bad);font-weight:900;font-size:22px;padding-left:10px}
.controls{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px;align-items:center}
.answered{font-weight:800;color:var(--muted)}.answered b{color:var(--text);font-size:20px}

/* resultado alumno */
.result{text-align:center;padding:30px 20px;border-radius:var(--radius)}
.result.good{background:color-mix(in srgb,var(--ok) 16%,var(--card))}
.result.bad{background:color-mix(in srgb,var(--bad) 14%,var(--card))}
.result .big{font-size:clamp(28px,7vw,44px);font-weight:900}
.result .gain{font-size:30px;font-weight:900;margin-top:6px}
.result.good .big,.result.good .gain{color:var(--ok)}.result.bad .big{color:var(--bad)}
.rankline{margin-top:14px;font-size:18px;font-weight:800}
.waitbox{text-align:center;padding:40px 18px}.waitbox .emo{font-size:54px;animation:bob 1.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.spin{width:46px;height:46px;border-radius:50%;border:4px solid var(--border);border-top-color:var(--accent);animation:sp 1s linear infinite;margin:18px auto}
@keyframes sp{to{transform:rotate(360deg)}}

/* leaderboard */
.lb{display:flex;flex-direction:column;gap:10px;margin-top:8px}
.lbrow{display:flex;align-items:center;gap:14px;background:var(--card2);border:1px solid var(--border);border-radius:12px;padding:12px 16px;animation:slidein .35s ease both}
@keyframes slidein{from{transform:translateX(-14px);opacity:0}to{transform:none;opacity:1}}
.lbrow .pos{font-weight:900;font-size:20px;width:38px;text-align:center;color:var(--muted);font-variant-numeric:tabular-nums}
.lbrow .nm{font-weight:800;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lbrow .sc{font-weight:900;font-variant-numeric:tabular-nums;font-size:18px;color:var(--accent)}
.lbrow.me{outline:2px solid var(--accent)}
.lbrow.top1{background:linear-gradient(135deg,color-mix(in srgb,#ffd70033,var(--card2)),var(--card2));border-color:#d4af37}
.lbrow.top1 .pos{color:#d4af37}.lbrow.top2 .pos{color:#9aa6b2}.lbrow.top3 .pos{color:#cd7f32}
.podium{display:flex;align-items:flex-end;justify-content:center;gap:14px;margin:24px 0;flex-wrap:wrap}
.pod{flex:0 0 130px;text-align:center}.pod .name{font-weight:800;margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pod .bar2{border-radius:14px 14px 0 0;display:grid;place-items:start center;padding-top:12px;color:#06210f;font-weight:900;font-size:26px}
.pod.p1 .bar2{height:170px;background:linear-gradient(180deg,#ffe27a,#d4af37)}
.pod.p2 .bar2{height:130px;background:linear-gradient(180deg,#e8edf3,#9aa6b2)}
.pod.p3 .bar2{height:100px;background:linear-gradient(180deg,#f0b88a,#cd7f32)}
.pod .sc{margin-top:6px;font-weight:800;color:var(--muted)}

.toast{position:fixed;left:50%;bottom:max(22px,env(safe-area-inset-bottom));transform:translateX(-50%);background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);padding:12px 18px;border-radius:12px;font-weight:700;z-index:60;animation:fade .2s;max-width:90vw;text-align:center}
.statusdot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--muted);margin-right:6px}
.statusdot.ok{background:var(--ok);box-shadow:0 0 8px var(--ok)}.statusdot.bad{background:var(--bad)}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}