*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
body{background:#c8dff0;font-family:'Segoe UI',Arial,sans-serif;font-size:16px;color:#1a1a2e;-webkit-tap-highlight-color:transparent}
#app{width:100%;max-width:900px;margin:0 auto;height:100vh;display:flex;flex-direction:column}
#topBar{background:#1a2f5a;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 14px;height:42px;flex-shrink:0;font-size:13px;gap:8px}
#topTimer{font-weight:bold;min-width:52px;flex-shrink:0}
#topTitle{flex:1;text-align:center;font-size:12px;opacity:.9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#topRight{min-width:80px;text-align:right;font-size:11px;opacity:.7;flex-shrink:0}
#progressBar{background:#1a2f5a;padding:4px 6px;flex-shrink:0;display:none}
#progressSquares{display:flex;gap:2px;flex-wrap:nowrap;width:100%}
.pSq{flex:1;min-width:0;height:10px;border-radius:2px;background:#4a6a9a;transition:background .2s;cursor:pointer}
.pSq.sq-green{background:#2a7a2a}
.pSq.sq-amber{background:#e67e00}
.pSq.sq-red{background:#c0392b}
.pSq.sq-cur{outline:2px solid #fff;outline-offset:1px}
.screen{flex:1;display:none;flex-direction:column;overflow:hidden}
.screen.active{display:flex}
#start,#results{overflow-y:auto;padding-bottom:24px}
#quiz{overflow:hidden}
.s-hero{background:#1a2f5a;color:#fff;padding:18px 16px 14px;text-align:center}
.s-badge{display:inline-block;background:rgba(255,255,255,.15);border-radius:20px;padding:4px 14px;font-size:12px;letter-spacing:.5px;margin-bottom:8px}
.s-title{font-size:19px;font-weight:bold;line-height:1.3;margin-bottom:4px;cursor:pointer;user-select:none}
.s-sub{font-size:13px;opacity:.75}
.s-stats{display:flex;border-bottom:2px solid #b0c8e0}
.s-stat{flex:1;text-align:center;padding:12px 8px;border-right:1px solid #b0c8e0;background:#fff}
.s-stat:last-child{border-right:none}
.s-stat .val{font-size:20px;font-weight:bold;color:#1a2f5a}
.s-stat .lbl{font-size:11px;color:#777;margin-top:2px}
.s-modes{padding:8px 10px 0}
.s-btn{width:100%;padding:13px 16px;border-radius:8px;margin-bottom:7px;font-size:15px;font-weight:bold;text-align:left;cursor:pointer;display:flex;align-items:center;gap:12px;transition:opacity .1s;border:none}
.s-btn:active{opacity:.82}
.s-ico{font-size:20px;flex-shrink:0}
.s-tl .t{font-weight:bold;font-size:15px}
.s-tl .sub{font-size:12px;opacity:.75;margin-top:1px}
.btn-p{background:#2a7a2a;color:#fff}
.btn-e{background:#1a2f5a;color:#fff}
.btn-d{background:#7d3c98;color:#fff}
.s-ht{text-align:center;font-size:12px;color:#777;padding:8px 10px 2px;cursor:pointer}
.s-hb{display:none;background:#fff;margin:4px 10px 0;border-radius:8px;padding:12px 14px;font-size:13px;color:#444;line-height:1.6;border:1px solid #b0c8e0}
.s-hb b{color:#1a2f5a}
#statsLine{text-align:center;font-size:11px;color:#888;padding:8px 10px 0}
.legend{display:flex;gap:10px;justify-content:center;padding:6px 10px 0;flex-wrap:wrap}
.leg{display:flex;align-items:center;gap:4px;font-size:11px;color:#555}
.leg-dot{width:10px;height:10px;border-radius:2px;flex-shrink:0}
#devPanel{display:none;background:#2c1654;margin:6px 10px 0;border-radius:8px;padding:10px 14px}
#devPanel p{color:#ccc;font-size:12px;margin-bottom:8px}
.dev-row{display:flex;gap:8px}
.dev-btn{flex:1;padding:9px;border-radius:6px;font-size:13px;font-weight:bold;border:none;cursor:pointer}
.dev-btn-3{background:#e67e00;color:#fff}
.dev-btn-all{background:#888;color:#fff}
#qHeader{background:#5aabde;display:flex;align-items:stretch;flex-shrink:0;min-height:50px}
#qIcon{background:#2580c3;color:#fff;font-size:22px;font-weight:bold;width:50px;flex-shrink:0;display:flex;align-items:center;justify-content:center}
#qText{flex:1;padding:8px 10px;font-size:15px;font-weight:bold;color:#fff;line-height:1.35;display:flex;align-items:center}
#qMark{color:#fff;font-size:11px;opacity:.85;padding:5px 10px 0 0;align-self:flex-start;white-space:nowrap;flex-shrink:0}
#optArea{flex:1;background:#c8dff0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:14px 12px;display:flex;flex-direction:column;gap:7px}
.opt{background:#fff;border:2px solid #9ab8d4;border-radius:5px;padding:10px 14px;font-size:15px;cursor:pointer;user-select:none;transition:background .1s,border-color .1s,color .1s;line-height:1.3}
.opt:active{background:#ddeeff}
.opt.selected{background:#2580c3;border-color:#1a6aaa;color:#fff}
.opt.correct{background:#2a7a2a;border-color:#1d5a1d;color:#fff}
.opt.wrong{background:#c0392b;border-color:#8b0000;color:#fff}
#fbBox{border-radius:6px;padding:10px 14px;font-size:14px;line-height:1.5;display:none}
#fbBox.hint{background:#e67e00;color:#fff;display:block}
#fbBox.insight{background:#922b21;color:#fff;display:block}
.tries-pill{display:inline-block;background:rgba(255,255,255,.22);border-radius:10px;padding:1px 8px;font-size:11px;margin-top:4px}
#botNav{background:linear-gradient(90deg,#3d1a6e 0%,#1a3a8f 100%);display:flex;height:54px;flex-shrink:0}
.nBtn{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;cursor:pointer;border-right:1px solid rgba(255,255,255,.1);user-select:none;transition:background .1s;gap:1px}
.nBtn:last-child{border-right:none}
.nBtn:active{background:rgba(255,255,255,.15)}
.nBtn.dim{opacity:.35;pointer-events:none}
.nArrow{font-size:16px;font-weight:bold}
.nLbl{font-size:11px;opacity:.8}
.nIcon{font-size:22px}
#nCounter{font-size:13px;font-weight:bold;line-height:1}
#nFlagBtn.flagged{background:rgba(255,160,0,.3)}
#gridOv{position:absolute;top:0;left:0;right:0;bottom:0;background:#e8f0f8;display:none;flex-direction:column;z-index:50;padding:8px;overflow-y:auto}
#gridOv.on{display:flex}
#gridOv h2{font-size:14px;color:#1a2f5a;padding:2px 4px 6px;flex-shrink:0}
#gridCells{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;padding-bottom:10px}
.gC{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-weight:bold;font-size:15px;cursor:pointer;border-radius:6px;background:#c0392b;color:#fff;border:3px solid transparent;transition:background .12s}
.gC:active{opacity:.7}
.gC.gc-cur{border-color:#1a2f5a}
.gC.gc-ok{background:#2a7a2a;border-radius:50%}
.gC.gc-amber{background:#e67e00;border-radius:50%}
.gC.gc-1{background:#e67e00}
.gC.gc-x{background:#6b1010}
.gC.gc-flag{outline:2px solid #ffe066;outline-offset:1px}
#gridFoot{flex-shrink:0;background:linear-gradient(90deg,#3d1a6e,#1a3a8f);border-radius:7px;padding:9px 12px;display:flex;gap:12px;flex-wrap:wrap;color:#fff;font-size:12px;margin:4px 0}
.gStat{display:flex;align-items:center;gap:5px}
.gDot{width:11px;height:11px;border-radius:2px;flex-shrink:0}
#gridEnd{background:linear-gradient(90deg,#3d1a6e,#1a3a8f);border-radius:7px;padding:11px;text-align:center;font-weight:bold;font-size:15px;color:#fff;cursor:pointer;flex-shrink:0;margin:3px 0 2px}
#gridEnd:active{opacity:.8}
#gridBack{background:#fff;border:1px solid #b0c8e0;border-radius:7px;padding:9px;text-align:center;font-size:14px;font-weight:bold;color:#1a2f5a;cursor:pointer;flex-shrink:0;margin:2px 0}
#gridBack:active{opacity:.7}
#popup{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:200;padding:16px}
#popup.on{display:flex}
#popBox{background:#fff;border-radius:12px;padding:18px;width:100%;max-width:520px;max-height:85vh;overflow-y:auto;box-shadow:0 8px 32px rgba(0,0,0,.28)}
#popNum{font-size:11px;color:#888;margin-bottom:4px}
#popQ{font-size:15px;font-weight:bold;color:#1a2f5a;margin-bottom:12px;line-height:1.4}
#popFB{border-radius:8px;padding:12px 14px;font-size:14px;line-height:1.5;margin-bottom:14px}
#popFB.hint{background:#e67e00;color:#fff}
#popFB.insight{background:#922b21;color:#fff}
#popBtns{display:flex;gap:8px;flex-wrap:wrap}
.pBtn{flex:1;min-width:90px;padding:10px 12px;border-radius:7px;font-size:14px;font-weight:bold;text-align:center;cursor:pointer;border:none}
.pBtn:active{opacity:.8}
.pBtn-grey{background:#ddd;color:#333}
.pBtn-go{background:#1a2f5a;color:#fff}
.r-score{color:#fff;text-align:center;padding:18px 16px}
.r-pass{background:#2a7a2a}
.r-fail{background:#c0392b}
.r-big{font-size:34px;font-weight:bold}
.r-mid{font-size:16px;margin-top:5px;opacity:.9}
.r-sm{font-size:13px;margin-top:3px;opacity:.75}
.r-card{background:#fff;margin:8px 10px 0;border-radius:8px;padding:12px 14px;border:1px solid #b0c8e0;font-size:13px;color:#444}
.r-card h3{font-size:14px;margin-bottom:8px;font-weight:bold}
.r-card h3.h-fail{color:#c0392b}
.r-card h3.h-amber{color:#e67e00}
.drill-btn{display:inline-block;border:none;border-radius:6px;padding:7px 12px;font-size:13px;font-weight:bold;cursor:pointer;margin:3px 4px 3px 0}
.drill-btn.d-fail{background:#c0392b;color:#fff}
.drill-btn.d-amber{background:#e67e00;color:#fff}
.drill-btn:active{opacity:.8}
.r-q{background:#fff;border-radius:0 6px 6px 0;margin:6px 10px 0;padding:10px 12px;border:1px solid #ddd}
.r-q.rq-fail{border-left:4px solid #c0392b}
.r-q.rq-amber{border-left:4px solid #e67e00}
.r-qtxt{font-weight:bold;font-size:14px;color:#1a2f5a;margin-bottom:5px}
.r-opt{font-size:13px;padding:2px 0}
.r-insight{background:#922b21;color:#fff;border-radius:5px;padding:8px 10px;font-size:12px;line-height:1.5;margin-top:7px}
.r-hint-note{background:#e67e00;color:#fff;border-radius:5px;padding:6px 10px;font-size:12px;margin-top:7px}
.r-btn{display:block;width:calc(100% - 20px);margin:8px 10px 0;padding:13px;border-radius:8px;font-size:15px;font-weight:bold;text-align:center;cursor:pointer;border:none}
.r-btn:active{opacity:.8}
.r-btn-blue{background:#1a2f5a;color:#fff}
.r-btn-grey{background:#ddd;color:#333}
@media(max-height:640px){#optArea{padding:8px 10px;gap:5px}.opt{padding:7px 12px;font-size:14px}#qText{font-size:14px}#botNav{height:48px}}
@media(max-height:520px){.opt{padding:5px 10px;font-size:13px}#botNav{height:44px}}