*{box-sizing:border-box}
  html,body{margin:0;height:100%;background:#0c0f17;color:#fff;font-family:"Inter","Segoe UI",system-ui,sans-serif;overflow:hidden;user-select:none;-webkit-user-select:none}
  #video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scaleX(-1);filter:none;background:#000;z-index:0}
  #ui{position:absolute;inset:0;z-index:4;pointer-events:none}
  #dividers{position:absolute;inset:0;pointer-events:none;z-index:3}
  #dividers .divider{position:absolute;top:8%;bottom:8%;width:4px;background:linear-gradient(180deg,transparent,#ffcf3a,transparent);opacity:.5}

  /* HUD */
  #scoreBar{position:absolute;top:14px;left:0;right:0;display:flex;justify-content:center;gap:10px;padding:0 18px;pointer-events:none}
  .scorePill{display:flex;align-items:center;gap:8px;
    padding:8px 16px;border-radius:999px;font-weight:900;font-size:32px;letter-spacing:1px;
    background:rgba(0,0,0,.6);border:4px solid #fff;color:#fff;text-shadow:0 2px 0 #000}
  .scorePill .lbl{font-size:12px;letter-spacing:2px;opacity:.9}
  body[data-np='1'] .scorePill{font-size:44px;padding:10px 22px}
  body[data-np='1'] .scorePill .lbl{font-size:14px}
  .timer{position:absolute;top:18px;left:50%;transform:translateX(-50%);
    background:rgba(0,0,0,.65);border:5px solid #ffcf3a;border-radius:24px;
    padding:8px 28px;font-size:54px;font-weight:900;letter-spacing:3px;color:#ffcf3a;text-shadow:0 2px 0 #000}
  .timer.low{color:#ff5b50;border-color:#ff5b50;animation:pulse 1s infinite}
  @keyframes pulse{50%{transform:translateX(-50%) scale(1.07)}}
  .roundChip{position:absolute;top:96px;left:50%;transform:translateX(-50%);
    background:rgba(0,0,0,.55);color:#fff;font-weight:900;font-size:18px;letter-spacing:2px;
    padding:6px 16px;border-radius:999px;border:2px solid rgba(255,255,255,.4)}
  #answerTimer{position:absolute;top:96px;right:24px;display:none;align-items:center;justify-content:center;
    min-width:86px;padding:7px 16px;border-radius:999px;border:3px solid #fff;background:rgba(0,0,0,.72);
    color:#ffcf3a;font-size:26px;font-weight:950;font-variant-numeric:tabular-nums;text-shadow:0 2px 0 #000}
  #answerTimer.show{display:flex}
  #answerTimer.low{color:#ff5b50;border-color:#ff5b50}

  /* target math banner */
  #target{position:absolute;top:140px;left:50%;transform:translateX(-50%);
    display:none;flex-direction:column;align-items:center;gap:12px;z-index:5}
  #target.show{display:flex;animation:popIn .35s ease-out}
  @keyframes popIn{from{transform:translateX(-50%) scale(.4);opacity:0}to{transform:translateX(-50%) scale(1);opacity:1}}
  #target .tLbl{background:rgba(0,0,0,.65);color:#ffcf3a;font-weight:900;letter-spacing:3px;
    padding:8px 22px;border-radius:999px;border:3px solid #ffcf3a;font-size:18px}
  #target .tColor{min-width:340px;height:200px;border-radius:32px;border:8px solid #fff;
    box-shadow:0 14px 0 #000,0 0 60px rgba(255,255,255,.4);
    display:flex;align-items:center;justify-content:center;font-size:72px;font-weight:950;color:#07131d;background:linear-gradient(180deg,#fffaf0,#ffe08a);
    white-space:pre-line;line-height:1.18;text-align:center}
  #actionHint{max-width:min(900px,92vw);padding:13px 30px;border:5px solid #fff;border-radius:999px;
    background:rgba(0,0,0,.78);box-shadow:0 7px 0 #000;color:#ffcf3a;font-size:clamp(24px,2vw,36px);font-weight:950;
    line-height:1.15;text-align:center;letter-spacing:0}
  #actionHint.choose{background:#126b36;color:#fff;border-color:#bff6d1}
  /* 3-2-1 in middle */
  #miniCd{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
    display:none;align-items:center;justify-content:center;font-size:200px;font-weight:900;font-style:italic;
    color:#ffcf3a;text-shadow:0 10px 0 #000,0 0 40px rgba(255,207,58,.6);z-index:6;
    width:280px;height:280px;border-radius:50%;
    background:radial-gradient(circle,rgba(0,0,0,.7),rgba(0,0,0,.2));border:8px solid #ffcf3a}
  #miniCd.show{display:flex;animation:cdPop .5s ease-out}
  @keyframes cdPop{from{transform:translate(-50%,-50%) scale(.4);opacity:0}to{transform:translate(-50%,-50%) scale(1);opacity:1}}

  /* options — one container per player */
  .options{position:absolute;bottom:3%;display:none;gap:14px;z-index:5;transform:translateX(-50%);justify-content:center}
  .options.show{display:flex;animation:slideUp .4s ease-out}
  @keyframes slideUp{from{transform:translateX(-50%) translateY(60px);opacity:0}to{transform:translateX(-50%) translateY(0);opacity:1}}
  .lanternOpt{aspect-ratio:1.12/1;border-radius:32px;border:10px solid #fff;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    background:linear-gradient(180deg,#bff6d1,#52d77c);
    box-shadow:0 14px 0 #000,0 0 50px rgba(0,0,0,.5);position:relative;overflow:hidden;
    transition:transform .15s, box-shadow .15s, border-color .15s}
  body[data-np='1'] .lanternOpt{width:min(260px,26vw)}
  body[data-np='2'] .lanternOpt{width:min(220px,22vw)}
  body[data-np='3'] .lanternOpt{width:min(150px,15vw)}
  body[data-np='4'] .lanternOpt{width:min(120px,11vw);border-width:7px}
  .lanternOpt .emoji{font-size:82px;line-height:1;font-weight:950;color:#052913;filter:drop-shadow(0 4px 0 rgba(255,255,255,.65))}
  body[data-np='3'] .lanternOpt .emoji,
  body[data-np='4'] .lanternOpt .emoji{font-size:64px}
  .lanternOpt .sideLbl{position:absolute;top:6px;left:8px;font-size:11px;font-weight:900;
    background:rgba(0,0,0,.55);color:#fff;padding:3px 8px;border-radius:8px;letter-spacing:1px}
  .lanternOpt.hover{transform:translateY(-10px) scale(1.04);border-color:#ffcf3a;box-shadow:0 18px 0 #000,0 0 80px rgba(255,207,58,.6)}
  .lanternOpt.correct{border-color:#3cd06a;box-shadow:0 14px 0 #000,0 0 100px rgba(60,208,106,.9)}
  .lanternOpt.wrong{border-color:#ff5b50;animation:shake .4s}
  @keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-10px)}75%{transform:translateX(10px)}}
  .lanternOpt .holdRing{position:absolute;inset:6px;border-radius:26px;
    background:conic-gradient(#ffcf3a calc(var(--p,0) * 1%), transparent 0);
    -webkit-mask:radial-gradient(circle, transparent 60%, #000 62%);mask:radial-gradient(circle, transparent 60%, #000 62%);
    opacity:.9;pointer-events:none}

  /* result stamp per player (positioned dynamically) */
  .resultStamp{position:absolute;top:34%;display:none;font-size:140px;line-height:1;z-index:7;
    text-shadow:0 8px 0 #000;animation:stampIn .4s ease-out;transform:translateX(-50%) rotate(-8deg)}
  .resultStamp.show{display:block}
  @keyframes stampIn{from{transform:translateX(-50%) scale(.3) rotate(-20deg);opacity:0}to{transform:translateX(-50%) scale(1) rotate(-8deg);opacity:1}}

  .gripHint{position:absolute;bottom:14px;font-size:18px;font-weight:900;letter-spacing:2px;color:#ffea00;
    text-shadow:0 3px 0 #000,0 0 16px rgba(255,234,0,.5);background:rgba(0,0,0,.45);
    padding:8px 18px;border-radius:999px;border:3px solid #ffea00;animation:bob 1.2s ease-in-out infinite alternate;
    transform:translateX(-50%);white-space:nowrap}
  .gripHint.hidden{display:none}
  @keyframes bob{to{transform:translateX(-50%) translateY(-6px)}}

  /* big 3-2-1-GO countdown */
  #countdown{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:10;
    background:rgba(0,0,0,.5);backdrop-filter:blur(6px)}
  #countdown.show{display:flex}
  #cdNum{font-size:280px;font-weight:900;font-style:italic;color:#fff;
    text-shadow:0 14px 0 #000,0 0 60px rgba(255,255,255,.6);animation:fullCdPop .85s ease-out}
  @keyframes fullCdPop{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}

  /* lobby */
  #lobby{position:absolute;inset:0;display:none;align-items:center;justify-content:center;
    background:linear-gradient(180deg,rgba(11,12,40,.85),rgba(11,12,40,.6));z-index:9;padding:20px}
  #lobby.show{display:flex}
  .lobbyCard{text-align:center;padding:30px 36px;border-radius:26px;max-width:640px;width:100%;
    background:linear-gradient(180deg,#fff8e8,#ffe7c4);color:#3a1d2a;
    box-shadow:0 14px 0 #2a0a1d,0 28px 60px rgba(0,0,0,.55);border:6px solid #fff}
  .lobbyCard h2{margin:0;font-size:38px;color:#a14a55;font-style:italic;letter-spacing:1px}
  .lobbyCard .sub{margin:6px 0 14px;font-size:18px;color:#3a1d2a;font-weight:700}
  .lobbyIcon{font-size:90px;line-height:1;display:inline-block;animation:waveHand 1.2s ease-in-out infinite alternate;transform-origin:50% 100%;
    filter:drop-shadow(0 8px 0 rgba(42,10,29,.28))}
  @keyframes waveHand{0%{transform:rotate(-12deg)}100%{transform:rotate(18deg)}}
  .lobbyPlayers{display:grid;gap:12px;justify-content:center;margin-top:8px}
  body[data-np='1'] .lobbyPlayers{grid-template-columns:minmax(220px,260px)}
  body[data-np='2'] .lobbyPlayers{grid-template-columns:repeat(2,minmax(180px,220px))}
  body[data-np='3'] .lobbyPlayers{grid-template-columns:repeat(3,minmax(150px,200px))}
  body[data-np='4'] .lobbyPlayers{grid-template-columns:repeat(2,minmax(150px,200px))}
  .lpSlot{padding:14px;border-radius:16px;border:4px dashed #bbb;
    background:#fff;color:#3a1d2a;font-weight:900;letter-spacing:1px}
  .lpSlot.p0{border-color:#c9160c} .lpSlot.p1{border-color:#0d3fb3}
  .lpSlot.p2{border-color:#1a8a2a} .lpSlot.p3{border-color:#b85a00}
  .lpSlot.ready{border-style:solid;background:linear-gradient(180deg,#fff7c4,#ffcf3a);color:#3a1d00;box-shadow:0 6px 0 #7a4a00}
  .lpSlot .ico{font-size:44px;display:block;margin-bottom:4px}
  .lpSlot .lbl{font-size:14px;letter-spacing:1px}
  .lpSlot .state{font-size:13px;font-weight:800;margin-top:6px;color:#5b3a3a;letter-spacing:1px;min-height:1.1em}
  .lpSlot.ready .state{color:#1a8a2a}
  .gripBar{height:8px;background:#e8e8e8;border-radius:4px;margin-top:8px;overflow:hidden}
  .gripBar > div{height:100%;width:0;background:linear-gradient(90deg,#7CFFB2,#1a8a2a);transition:width .12s}
  .lobbyFoot{margin-top:14px;font-size:14px;color:#666}
  .lobbyStart{margin-top:18px;pointer-events:auto;background:linear-gradient(180deg,#7CFFB2,#1a8a2a);
    color:#06240f;border:0;padding:18px 42px;border-radius:999px;font-size:22px;font-weight:900;letter-spacing:2px;
    cursor:pointer;font-family:inherit;box-shadow:0 6px 0 #0d4a17,0 14px 28px rgba(0,0,0,.35);transition:transform .08s}
  .lobbyStart:active{transform:translateY(3px);box-shadow:0 3px 0 #0d4a17,0 8px 18px rgba(0,0,0,.35)}

  /* start screen */
  #startScreen{position:fixed;inset:0;background:linear-gradient(180deg,#241346,#7c4de0,#caa9ff);
    display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:6;padding:24px;text-align:center;gap:18px}
  .back-btn{position:absolute;top:14px;left:14px;color:#fff;text-decoration:none;font-weight:800;
    background:rgba(0,0,0,.4);padding:8px 14px;border-radius:999px;border:2px solid #fff;font-size:14px;letter-spacing:1px;z-index:10}
  .hero h1{margin:0;font-size:clamp(40px,7vw,80px);color:#fff;-webkit-text-stroke:3px #2a0a1d;
    text-shadow:0 6px 0 #2a0a1d;letter-spacing:2px;font-style:italic;font-weight:900}
  .hero p{font-size:18px;color:#ffeebb;max-width:680px;line-height:1.5;font-weight:700}
  .steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;max-width:920px}
  .step{background:#fff;color:#2a0a1d;border-radius:18px;padding:16px;border:4px solid #2a0a1d;box-shadow:0 6px 0 #2a0a1d}
  .step .n{display:inline-block;width:36px;height:36px;border-radius:50%;background:#ffcf3a;color:#3a1d00;
    font-weight:900;line-height:36px;margin-bottom:8px;border:3px solid #fff;box-shadow:0 3px 0 #7a4a00}
  .step h3{margin:0 0 4px;font-size:18px;letter-spacing:.5px}
  .step p{margin:0;font-size:14px;color:#3a1d2a}
  #startBtn{pointer-events:auto;background:linear-gradient(180deg,#ffcf3a,#f29b1a);color:#3a1d00;border:0;
    padding:18px 46px;border-radius:999px;font-size:24px;font-weight:900;letter-spacing:2px;cursor:pointer;
    font-family:inherit;box-shadow:0 8px 0 #7a4a00,0 16px 30px rgba(0,0,0,.4);transition:transform .08s}
  #startBtn:active{transform:translateY(4px);box-shadow:0 4px 0 #7a4a00,0 10px 20px rgba(0,0,0,.4)}
  #startBtn[disabled]{opacity:.6;cursor:not-allowed}
  #status{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);font-size:14px;color:#ffeebb}

  /* results */
  #results{position:absolute;inset:0;display:none;align-items:center;justify-content:center;z-index:10;
    background:rgba(11,12,40,.92);padding:20px}
  #results.show{display:flex}
  .resultsCard{max-width:760px;width:100%;background:linear-gradient(180deg,#fff8e8,#ffe7c4);
    border:6px solid #fff;border-radius:26px;padding:28px;color:#2a0a1d;text-align:center;
    box-shadow:0 14px 0 #2a0a1d,0 28px 60px rgba(0,0,0,.55)}
  .resultsCard h2{margin:0;font-size:44px;color:#a14a55;font-style:italic;letter-spacing:2px}
  .winnerRow{display:grid;gap:14px;margin:18px 0;justify-content:center}
  body[data-np='1'] .winnerRow{grid-template-columns:minmax(220px,260px)}
  body[data-np='2'] .winnerRow{grid-template-columns:repeat(2,minmax(180px,240px))}
  body[data-np='3'] .winnerRow{grid-template-columns:repeat(3,minmax(150px,200px))}
  body[data-np='4'] .winnerRow{grid-template-columns:repeat(2,minmax(160px,200px))}
  .winnerCol{padding:18px;border-radius:18px;background:#fff;border:4px solid #ddd;
    display:flex;flex-direction:column;align-items:center;gap:6px}
  .winnerCol.p0{border-color:#c9160c} .winnerCol.p1{border-color:#0d3fb3}
  .winnerCol.p2{border-color:#1a8a2a} .winnerCol.p3{border-color:#b85a00}
  .winnerCol.win{background:linear-gradient(180deg,#fff7c4,#ffcf3a);border-color:#7a4a00;
    box-shadow:0 6px 0 #7a4a00;transform:scale(1.05)}
  .winnerCol .nm{font-size:18px;font-weight:900;letter-spacing:2px}
  .winnerCol .sc{font-size:64px;font-weight:900;line-height:1}
  .winnerCol .sub{font-size:14px;color:#555}
  .winnerCol.win .sub{color:#7a4a00;font-weight:900}
  .actions{display:flex;gap:12px;justify-content:center;margin-top:10px;flex-wrap:wrap}
  .actions button,.actions a{pointer-events:auto;background:#ffcf3a;color:#3a1d00;border:0;
    padding:14px 28px;border-radius:999px;font-size:16px;font-weight:900;letter-spacing:1px;cursor:pointer;
    font-family:inherit;box-shadow:0 5px 0 #7a4a00;text-decoration:none}
  .actions a.ghost{background:#fff;color:#2a0a1d;box-shadow:0 5px 0 #aaa}