:root{
  --yellow:#FFC72C; --yellow-dark:#E0A800; --charcoal:#1F2326; --charcoal-2:#2B3035;
  --steel:#3A4148; --light:#F5F5F2; --text:#22272B; --muted:#5D666E; --white:#fff;
  --green:#1E8E4E; --green-bg:#E5F5EC; --red:#C62828; --red-bg:#FDECEC;
  --radius:12px; --nav-h:62px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--light);line-height:1.5;min-height:100vh;padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom))}
a{color:inherit}
button{font:inherit;cursor:pointer}
.stripe{height:8px;background:repeating-linear-gradient(-45deg,var(--yellow) 0 14px,var(--charcoal) 14px 28px)}
.topbar{background:var(--charcoal);color:#fff;display:flex;align-items:center;gap:10px;padding:10px 16px;position:sticky;top:0;z-index:20}
.logo{font-weight:900;font-size:1.3rem;letter-spacing:-.5px;text-decoration:none;white-space:nowrap}
.logo span{color:var(--yellow)}
.logo svg{vertical-align:-4px;margin-right:5px}
.top-sub{font-size:.75rem;color:#9AA3AB;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-link{text-decoration:none;color:var(--yellow);font-size:1.25rem;padding:2px 6px}
main{max-width:720px;margin:0 auto;padding:16px 14px 24px;outline:none}
.loading{padding:40px;text-align:center;color:var(--muted)}
h1{font-size:1.45rem;font-weight:900;letter-spacing:-.5px;color:var(--charcoal);line-height:1.2;margin-bottom:6px}
h2{font-size:1.1rem;font-weight:800;color:var(--charcoal);margin:18px 0 10px}
h3{font-size:1rem;font-weight:800;color:var(--charcoal)}
p.lead{color:var(--muted);margin-bottom:14px;font-size:.95rem}
.muted{color:var(--muted)} .small{font-size:.82rem} .center{text-align:center}
.card{background:#fff;border-radius:var(--radius);padding:16px;box-shadow:0 2px 8px rgba(0,0,0,.06);margin-bottom:12px}
.card.yb{border-top:5px solid var(--yellow)}
.dark-card{background:var(--charcoal);color:#fff;border-radius:var(--radius);padding:16px;margin-bottom:12px;position:relative;overflow:hidden}
.dark-card h1,.dark-card h2,.dark-card h3{color:#fff}
.dark-card .muted{color:#B8BFC6}
.hero-greet .eyebrow{display:inline-block;background:rgba(255,199,44,.15);color:var(--yellow);border:1px solid rgba(255,199,44,.4);padding:2px 10px;border-radius:999px;font-size:.75rem;font-weight:700;margin-bottom:8px}
.hero-greet h1 em{font-style:normal;color:var(--yellow)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}
.stat{background:var(--charcoal-2);border:1px solid var(--steel);border-radius:10px;padding:10px 8px;text-align:center}
.stat b{display:block;font-size:1.35rem;font-weight:900;color:var(--yellow);line-height:1.1}
.stat span{font-size:.72rem;color:#C9CED3;text-transform:uppercase;letter-spacing:.5px}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tile{display:block;background:#fff;border-radius:var(--radius);padding:14px;text-decoration:none;box-shadow:0 2px 8px rgba(0,0,0,.06);border-top:5px solid var(--yellow);min-height:104px}
.tile .ti{font-size:1.4rem;line-height:1}
.tile h3{margin:6px 0 2px;font-size:.98rem}
.tile p{font-size:.8rem;color:var(--muted);line-height:1.35}
.tile.dark{background:var(--charcoal);color:#fff;border-top-color:var(--yellow)}
.tile.dark h3{color:#fff}.tile.dark p{color:#B8BFC6}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--yellow);color:var(--charcoal);font-weight:800;padding:13px 18px;border-radius:9px;text-decoration:none;border:none;font-size:1rem;min-height:48px;transition:background .15s}
.btn:hover{background:var(--yellow-dark)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.block{display:flex;width:100%}
.btn.dark{background:var(--charcoal);color:var(--yellow)}
.btn.ghost{background:transparent;border:2px solid var(--charcoal);color:var(--charcoal)}
.btn.small{padding:8px 12px;min-height:38px;font-size:.88rem}
.btn.green{background:var(--green);color:#fff}
.btn.red{background:var(--red);color:#fff}
.row{display:flex;gap:8px;align-items:center}
.row.wrap{flex-wrap:wrap}
.row > .grow{flex:1}
.spacer{height:10px}
.topic-list{list-style:none}
.topic-item{display:flex;align-items:center;gap:10px;background:#fff;border-radius:10px;padding:12px 14px;margin-bottom:8px;text-decoration:none;box-shadow:0 1px 4px rgba(0,0,0,.05);border-left:5px solid var(--yellow)}
.topic-item .tname{font-weight:700;color:var(--charcoal);font-size:.95rem}
.topic-item .tmeta{font-size:.78rem;color:var(--muted)}
.topic-item .chev{margin-left:auto;color:var(--muted);font-size:1.2rem}
.bar{height:8px;background:#E3E4E0;border-radius:99px;overflow:hidden;margin-top:5px}
.bar > i{display:block;height:100%;background:var(--yellow);border-radius:99px}
.bar.good > i{background:var(--green)} .bar.bad > i{background:var(--red)}
.q-top{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--muted);margin-bottom:8px;gap:8px}
.tag{display:inline-block;background:var(--charcoal);color:var(--yellow);font-size:.7rem;font-weight:800;padding:3px 9px;border-radius:999px;text-transform:uppercase;letter-spacing:.4px}
.tag.y{background:var(--yellow);color:var(--charcoal)}
.tag.draft{background:#ECECE7;color:var(--muted)}
.qtext{font-weight:700;font-size:1.02rem;color:var(--charcoal);margin-bottom:12px;line-height:1.45}
.choices{display:flex;flex-direction:column;gap:8px}
.choice{display:flex;gap:10px;align-items:flex-start;text-align:left;width:100%;background:#fff;border:2px solid #DADCD6;border-radius:10px;padding:10px 12px;font-size:.97rem;color:var(--text);min-height:48px;transition:border-color .1s,background .1s}
.choice .letter{flex:0 0 26px;height:26px;border-radius:50%;background:#ECECE7;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.85rem}
.choice:hover:not(:disabled){border-color:var(--yellow-dark)}
.choice.selected{border-color:var(--charcoal);background:#FFF8E1}
.choice.selected .letter{background:var(--charcoal);color:var(--yellow)}
.choice.correct{border-color:var(--green);background:var(--green-bg)}
.choice.correct .letter{background:var(--green);color:#fff}
.choice.wrong{border-color:var(--red);background:var(--red-bg)}
.choice.wrong .letter{background:var(--red);color:#fff}
.choice:disabled{cursor:default}
.feedback{margin-top:14px;border-radius:10px;padding:14px;background:var(--charcoal);color:#E7EAEC;border-left:6px solid var(--yellow)}
.feedback .verdict{font-weight:900;font-size:1.05rem;margin-bottom:6px}
.feedback .verdict.ok{color:#7BE0A4}.feedback .verdict.no{color:#FF9C9C}
.feedback p{font-size:.93rem;line-height:1.5}
.necref{margin-top:10px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:.8rem}
.necref b{background:var(--yellow);color:var(--charcoal);padding:3px 8px;border-radius:6px;font-weight:800}
.necref span{color:#B8BFC6}
.sticky-actions{position:sticky;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 6px);margin-top:14px;z-index:5}
.timerbar{position:sticky;top:52px;z-index:10;background:var(--charcoal);color:#fff;border-radius:10px;padding:8px 12px;display:flex;align-items:center;gap:10px;margin-bottom:12px;box-shadow:0 4px 12px rgba(0,0,0,.18)}
.timerbar .timer{color:var(--yellow);font-weight:900;font-variant-numeric:tabular-nums;font-size:1.1rem}
.timerbar .timer.low{color:#FF8A80}
.timerbar .qpos{font-size:.85rem;color:#C9CED3}
.flagbtn{margin-left:auto;background:transparent;border:1.5px solid var(--steel);color:#C9CED3;border-radius:8px;padding:5px 10px;font-size:.8rem;font-weight:700}
.flagbtn.on{border-color:var(--yellow);color:var(--charcoal);background:var(--yellow)}
.navgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:6px;margin:10px 0}
.navgrid button{height:40px;border-radius:8px;border:2px solid #DADCD6;background:#fff;font-weight:700;font-size:.85rem;position:relative}
.navgrid button.ans{background:var(--charcoal);color:#fff;border-color:var(--charcoal)}
.navgrid button.flag::after{content:"";position:absolute;top:-4px;right:-4px;width:12px;height:12px;border-radius:50%;background:var(--yellow);border:2px solid #fff}
.navgrid button.cur{outline:3px solid var(--yellow);outline-offset:1px}
.navgrid button.ok{background:var(--green-bg);border-color:var(--green);color:var(--green)}
.navgrid button.no{background:var(--red-bg);border-color:var(--red);color:var(--red)}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:.75rem;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-2px;margin-right:4px;border:2px solid #DADCD6}
.preset{display:block;width:100%;text-align:left;background:#fff;border:2px solid #DADCD6;border-radius:10px;padding:12px 14px;margin-bottom:8px}
.preset.on{border-color:var(--charcoal);background:#FFF8E1}
.preset b{display:block;color:var(--charcoal)}
.preset span{font-size:.82rem;color:var(--muted)}
label.field{display:block;font-size:.82rem;font-weight:700;color:var(--charcoal);margin-bottom:4px}
input[type=number],input[type=text],input[type=search],input[type=email],select,textarea{width:100%;padding:11px 12px;border-radius:8px;border:2px solid #CFD2CC;font-size:1rem;background:#fff;color:var(--text);font-family:inherit}
textarea{min-height:64px;resize:vertical;font-size:.92rem}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--charcoal)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.check{display:flex;gap:8px;align-items:flex-start;font-size:.9rem;margin-top:10px}
.check input{width:20px;height:20px;margin-top:2px;accent-color:var(--charcoal)}
.result-hero{text-align:center;padding:22px 16px}
.result-hero .big{font-size:3rem;font-weight:900;line-height:1;color:var(--yellow)}
.passfail{display:inline-block;margin-top:8px;font-weight:900;padding:5px 14px;border-radius:999px;letter-spacing:1px}
.passfail.pass{background:var(--green);color:#fff}.passfail.fail{background:var(--red);color:#fff}
details.miss{background:#fff;border-radius:10px;margin-bottom:8px;padding:12px 14px;box-shadow:0 1px 4px rgba(0,0,0,.05);border-left:5px solid var(--red)}
details.miss summary{font-weight:700;cursor:pointer;font-size:.92rem;color:var(--charcoal)}
details.miss .ans{margin-top:8px;font-size:.88rem}
.flash-wrap{perspective:1200px;margin:10px 0}
.flashcard{position:relative;width:100%;min-height:270px;transform-style:preserve-3d;transition:transform .45s;cursor:pointer;border:none;background:transparent;padding:0;text-align:center}
.flashcard.flipped{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:14px;padding:22px 18px;display:flex;flex-direction:column;justify-content:center;align-items:center;box-shadow:0 6px 18px rgba(0,0,0,.12)}
.face.front{background:var(--charcoal);color:#fff;border:3px solid var(--yellow)}
.face.front .ft{font-size:1.2rem;font-weight:800;line-height:1.35}
.face.back{background:#fff;transform:rotateY(180deg);border-top:6px solid var(--yellow)}
.face.back .bt{white-space:pre-line;font-size:1rem;line-height:1.55;color:var(--charcoal);font-weight:600;text-align:left}
.face .hint{position:absolute;bottom:10px;left:0;right:0;font-size:.72rem;color:#9AA3AB}
.face .fref{margin-top:12px;font-size:.78rem;color:var(--muted)}
.chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;border:2px solid #CFD2CC;background:#fff;border-radius:999px;padding:6px 12px;font-size:.82rem;font-weight:700;color:var(--charcoal)}
.chip.on{background:var(--charcoal);border-color:var(--charcoal);color:var(--yellow)}
.rv-card{background:#fff;border-radius:var(--radius);padding:14px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.06);border-left:6px solid #CFD2CC}
.rv-card.approved{border-left-color:var(--green)}
.rv-card.needs_fix{border-left-color:var(--red)}
.rv-card .rv-q{font-weight:700;color:var(--charcoal);margin:6px 0 8px;font-size:.97rem}
.rv-card ol{padding-left:22px;font-size:.9rem;margin-bottom:8px}
.rv-card li{margin-bottom:2px}
.rv-card li.ok{font-weight:800;color:var(--green)}
.rv-card .rv-ex{font-size:.86rem;color:var(--text);background:#F5F5F2;border-radius:8px;padding:9px 10px;border-left:3px solid var(--yellow)}
.rv-card .rv-meta{font-size:.78rem;color:var(--muted);margin:8px 0}
.rv-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0}
.rv-actions .btn{min-height:44px;font-size:.92rem}
.rv-actions .btn.off{background:#ECECE7;color:var(--muted)}
.pill{display:inline-block;font-size:.7rem;font-weight:800;padding:2px 8px;border-radius:999px;text-transform:uppercase;letter-spacing:.3px}
.pill.approved{background:var(--green-bg);color:var(--green)}
.pill.needs_fix{background:var(--red-bg);color:var(--red)}
.pill.unreviewed{background:#ECECE7;color:var(--muted)}
.rv-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0}
.rv-summary div{background:#fff;border-radius:10px;padding:8px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,.05)}
.rv-summary b{display:block;font-size:1.3rem;font-weight:900}
.rv-summary span{font-size:.72rem;color:var(--muted);text-transform:uppercase}
.chart{width:100%;height:auto;display:block}
table.hist{width:100%;border-collapse:collapse;font-size:.88rem}
table.hist th,table.hist td{padding:8px 6px;border-bottom:1px solid #E3E4E0;text-align:left}
table.hist th{font-size:.72rem;text-transform:uppercase;color:var(--muted)}
.empty{padding:22px;text-align:center;color:var(--muted);background:#fff;border-radius:var(--radius);border:2px dashed #DADCD6}
.notice{background:#FFF8E1;border:1px solid #F3D57A;border-radius:10px;padding:10px 12px;font-size:.84rem;color:#5B4A12;margin-bottom:12px}
.facts{list-style:none}
.facts li{padding:8px 0;border-bottom:1px solid #E3E4E0;font-size:.92rem}
.facts li b{color:var(--charcoal)}
.src{font-size:.8rem;word-break:break-word}
.bottomnav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--charcoal);display:flex;z-index:30;border-top:3px solid var(--yellow)}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-decoration:none;color:#9AA3AB;font-size:.7rem;font-weight:700;position:relative}
.bottomnav a .ni{font-size:1.25rem;line-height:1.1}
.bottomnav a.on{color:var(--yellow)}
.badge-dot{position:absolute;top:6px;left:calc(50% + 8px);min-width:18px;height:18px;border-radius:9px;background:var(--yellow);color:var(--charcoal);font-size:.65rem;display:flex;align-items:center;justify-content:center;padding:0 4px}
#toast{position:fixed;left:50%;bottom:calc(var(--nav-h) + 18px);transform:translateX(-50%) translateY(20px);background:var(--charcoal);color:#fff;padding:10px 16px;border-radius:999px;font-size:.88rem;opacity:0;pointer-events:none;transition:all .25s;z-index:50;border:2px solid var(--yellow);max-width:90vw}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.footer-note{font-size:.75rem;color:var(--muted);text-align:center;margin-top:20px;line-height:1.4}

/* Progressive practice hints */
.hint-actions{margin-top:12px;display:flex;justify-content:flex-start}
.hint-stack{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.qhint{background:#FFF8E1;border:1px solid #F3D57A;border-left:4px solid var(--charcoal);border-radius:10px;padding:10px 12px;font-size:.88rem;color:#5B4A12;line-height:1.45}
.qhint-label{display:inline-block;font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.4px;color:var(--charcoal);background:rgba(31,35,38,.08);padding:2px 8px;border-radius:999px;margin-right:8px;vertical-align:1px}
.qhint-text{color:#5B4A12}
#hintBtn{border-color:#C9A227;color:var(--charcoal);background:#FFF8E1}
#hintBtn:hover:not(:disabled){background:#FFEFBF}
#hintBtn:disabled{opacity:.55;border-color:#CFD2CC;color:var(--muted);background:#F5F5F2}
/* Waitlist card (Netlify Forms) */
.waitlist{border-top:5px solid var(--yellow);border-left:5px solid var(--charcoal);scroll-margin-top:72px;outline:none}
.waitlist .wl-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}
.waitlist .wl-icon{flex:0 0 40px;height:40px;border-radius:50%;background:var(--charcoal);color:var(--yellow);display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:900}
.waitlist h2{margin:0 0 2px;font-size:1.12rem}
.waitlist .wl-sub{font-size:.88rem;color:var(--muted);line-height:1.4}
.waitlist label.field .opt{font-weight:400;color:var(--muted)}
.waitlist .wl-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0 12px}
.waitlist .wl-hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.waitlist input[aria-invalid=true]{border-color:var(--red);background:var(--red-bg)}
.waitlist .wl-msg{font-size:.86rem;margin-top:8px;min-height:0}
.waitlist .wl-msg:empty{display:none}
.waitlist .wl-msg.err{color:var(--red);font-weight:700}
.waitlist.thanks{background:#FFF8E1}
.waitlist.thanks .wl-icon{background:var(--green);color:#fff}
.waitlist.thanks .wl-head{margin-bottom:0}
.waitlist-done{display:flex;gap:8px;align-items:center;background:#FFF8E1;border:1px solid #F3D57A;border-radius:10px;padding:8px 12px;font-size:.84rem;color:#5B4A12;margin-bottom:12px;scroll-margin-top:72px}
.waitlist-done .wl-check{flex:0 0 22px;height:22px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:.8rem}
.wl-about{background:#FFF8E1;border:1px solid #F3D57A;border-left:4px solid var(--yellow);border-radius:10px;padding:10px 12px;margin-top:18px;color:#5B4A12}
.wl-about a{color:var(--charcoal);font-weight:800}
@media (max-width:340px){.waitlist .wl-grid{grid-template-columns:1fr}}
@media (min-width:640px){.tiles{grid-template-columns:repeat(3,1fr)} main{padding-top:24px}}
.badge-dot[hidden]{display:none}