:root{
  --green:#00843D; --green-dark:#006B31; --gold:#FFCD00; --gold-dark:#E6B800;
  --ink:#1a2b23; --muted:#5c6f65; --bg:#f4f7f5; --card:#ffffff; --line:#e2e9e5;
  --red:#C62828; --red-bg:#FDECEA; --green-bg:#E8F5EE; --amber-bg:#FFF8E1;
  --radius:14px; --shadow:0 1px 3px rgba(20,40,30,.08), 0 4px 14px rgba(20,40,30,.06);
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html{font-size:16px;}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.5; min-height:100vh;
  padding-bottom:env(safe-area-inset-bottom);
}
.wrap{max-width:640px; margin:0 auto; padding:0 16px 40px;}
header.app{
  background:linear-gradient(135deg,var(--green) 0%,var(--green-dark) 100%);
  color:#fff; padding:calc(14px + env(safe-area-inset-top)) 16px 14px;
  position:sticky; top:0; z-index:50; box-shadow:var(--shadow);
}
.hrow{max-width:640px; margin:0 auto; display:flex; align-items:center; justify-content:space-between; gap:10px;}
.htitle{font-weight:700; font-size:1.02rem; letter-spacing:.2px;}
.hsub{font-size:.78rem; opacity:.85; margin-top:1px;}
.timer{
  font-variant-numeric:tabular-nums; font-weight:700; font-size:1rem;
  background:rgba(255,255,255,.16); padding:6px 12px; border-radius:999px; white-space:nowrap;
}
.timer.low{background:var(--red); animation:pulse 1s infinite;}
@keyframes pulse{50%{opacity:.75;}}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border:none; border-radius:12px; cursor:pointer; font-weight:600;
  font-size:1rem; padding:14px 20px; transition:transform .05s, background .15s;
  touch-action:manipulation; user-select:none;
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--green); color:#fff;}
.btn-primary:hover{background:var(--green-dark);}
.btn-gold{background:var(--gold); color:#2b2300;}
.btn-gold:hover{background:var(--gold-dark);}
.btn-ghost{background:transparent; color:var(--green); border:1.5px solid var(--green);}
.btn-plain{background:#eef2ef; color:var(--ink);}
.btn[disabled]{opacity:.45; cursor:default;}
.btn-sm{padding:9px 14px; font-size:.9rem; border-radius:10px;}
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow);}

/* Home */
.hero{margin:20px 0 14px;}
.hero h1{font-size:1.35rem; margin:0 0 6px;}
.hero p{margin:0; color:var(--muted); font-size:.92rem;}
.rules{margin:14px 0; padding:14px 16px; font-size:.88rem;}
.rules b{color:var(--green-dark);}
.rules ul{margin:8px 0 0; padding-left:18px;}
.rules li{margin:4px 0;}
.statsbar{display:flex; gap:10px; margin:14px 0;}
.stat{flex:1; text-align:center; padding:12px 6px;}
.stat .n{font-size:1.35rem; font-weight:800; color:var(--green-dark);}
.stat .l{font-size:.72rem; color:var(--muted); text-transform:uppercase; letter-spacing:.05em;}
.testgrid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:14px;}
.testcard{
  padding:22px 16px; min-height:110px; cursor:pointer; position:relative; border:1px solid var(--line);
  display:flex; flex-direction:column; justify-content:center;
  background:var(--card); border-radius:var(--radius); box-shadow:var(--shadow);
  transition:transform .06s;
}
.testcard:active{transform:scale(.97);}
.testcard .tnum{font-weight:800; font-size:1.05rem;}
.testcard .tmeta{font-size:.78rem; color:var(--muted); margin-top:3px;}
.badge{
  position:absolute; top:10px; right:10px; font-size:.68rem; font-weight:700;
  padding:3px 9px; border-radius:999px; letter-spacing:.03em;
}
.badge.pass{background:var(--green-bg); color:var(--green-dark);}
.badge.fail{background:var(--red-bg); color:var(--red);}
.note{font-size:.8rem; color:var(--muted); margin-top:16px;}
.note a{color:var(--green-dark);}

/* Quiz */
.progressbar{height:6px; background:#dfe8e2; border-radius:999px; margin:16px 0 6px; overflow:hidden;}
.progressbar > div{height:100%; background:var(--gold); border-radius:999px; transition:width .25s;}
.qmeta{display:flex; justify-content:space-between; align-items:center; font-size:.82rem; color:var(--muted); margin-bottom:12px;}
.qcount{font-weight:700; color:var(--ink);}
.qcard{padding:18px 18px 6px; margin-bottom:14px;}
.qtext{font-size:1.08rem; font-weight:650; margin:0 0 16px; line-height:1.45;}
.opt{
  display:flex; align-items:flex-start; gap:12px; width:100%; text-align:left;
  background:#fbfdfc; border:1.5px solid var(--line); border-radius:12px;
  padding:14px; margin-bottom:12px; cursor:pointer; font-size:.98rem; line-height:1.4;
  transition:border-color .12s, background .12s; color:var(--ink); font-family:inherit;
}
.opt:active{background:#f1f6f3;}
.opt .dot{
  flex:0 0 22px; height:22px; border-radius:50%; border:2px solid #b9c8bf;
  margin-top:1px; display:flex; align-items:center; justify-content:center;
}
.opt.sel{border-color:var(--green); background:var(--green-bg);}
.opt.sel .dot{border-color:var(--green); background:var(--green);}
.opt.sel .dot::after{content:""; width:8px; height:8px; border-radius:50%; background:#fff;}
.navrow{display:flex; gap:10px; margin-top:4px;}
.navrow .btn{flex:1;}
.quitrow{text-align:center; margin-top:18px;}
.quitrow button{background:none; border:none; color:var(--muted); font-size:.85rem; text-decoration:underline; cursor:pointer; padding:8px;}
.unanswered-warn{background:var(--amber-bg); border:1px solid #f0e0a0; border-radius:12px; padding:12px 14px; font-size:.88rem; margin-bottom:12px; display:none;}

/* Results */
.resulthead{text-align:center; padding:26px 18px 22px; margin:20px 0 14px;}
.verdict{font-size:1.7rem; font-weight:800; margin:6px 0;}
.verdict.pass{color:var(--green-dark);}
.verdict.fail{color:var(--red);}
.scorebig{font-size:2.6rem; font-weight:800; line-height:1;}
.scorebig small{font-size:1.1rem; color:var(--muted); font-weight:600;}
.critrow{display:flex; gap:10px; margin-top:18px;}
.crit{flex:1; border-radius:12px; padding:10px 8px; font-size:.8rem;}
.crit .cv{font-weight:800; font-size:1.05rem;}
.crit.ok{background:var(--green-bg); color:var(--green-dark);}
.crit.bad{background:var(--red-bg); color:var(--red);}
.whyfail{font-size:.88rem; color:var(--muted); margin-top:14px;}
.revh{font-size:1.05rem; font-weight:750; margin:22px 0 10px;}
.revcard{padding:16px; margin-bottom:12px; border-left:5px solid var(--line);}
.revcard.wrong{border-left-color:var(--red);}
.revcard.right{border-left-color:var(--green);}
.revcard .rq{font-weight:650; margin:0 0 10px; font-size:.96rem;}
.tag{display:inline-block; font-size:.66rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase;
  padding:2px 8px; border-radius:999px; background:#efe9d2; color:#7a6400; margin-bottom:8px;}
.tag.gen{background:#e3ecf5; color:#1f4e79;}
.ansline{font-size:.88rem; margin:5px 0; padding:8px 10px; border-radius:8px;}
.ansline.you{background:var(--red-bg); color:#8c1f1f;}
.ansline.corr{background:var(--green-bg); color:var(--green-dark);}
.ansline.youok{background:var(--green-bg); color:var(--green-dark);}
.expl{font-size:.87rem; color:#3d4d44; background:#f7faf8; border:1px solid var(--line); border-radius:8px; padding:10px 12px; margin-top:9px;}
.expl b{color:var(--green-dark);}
.refline{font-size:.76rem; color:var(--muted); margin-top:7px; font-style:italic;}
.resultbtns{display:flex; flex-direction:column; gap:10px; margin:20px 0;}
.hidden{display:none !important;}
.screen{animation:fadein .18s ease;}
@keyframes fadein{from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:none;}}
.histline{font-size:.8rem; color:var(--muted); margin-top:6px;}

/* ---------- Production additions ---------- */
a{color:var(--green-dark);}
:focus-visible{outline:3px solid var(--gold); outline-offset:2px;}
.skip{position:absolute; left:-9999px; top:0; background:var(--gold); color:#2b2300; padding:8px 12px; z-index:100; border-radius:0 0 8px 0;}
.skip:focus{left:0;}
.htitle a{color:inherit; text-decoration:none;}
.hright{display:flex; align-items:center; gap:8px;}
.acctbtn{
  background:rgba(255,255,255,.16); color:#fff; border:1px solid rgba(255,255,255,.35);
  border-radius:999px; padding:6px 12px; font-weight:600; font-size:.85rem; cursor:pointer;
  white-space:nowrap; max-width:150px; overflow:hidden; text-overflow:ellipsis;
}
.acctbtn:hover{background:rgba(255,255,255,.26);}

/* Banners (resume test, save progress) */
.banner{padding:14px 16px; margin:14px 0; font-size:.9rem;}
.banner.amber{background:var(--amber-bg); border-color:#f0e0a0;}
.banner.green{background:var(--green-bg); border-color:#cfe6d8;}
.banner p{margin:0 0 10px;}
.banner .row{display:flex; gap:8px; flex-wrap:wrap;}

/* Disclaimer */
.disclaimer{font-size:.78rem; color:var(--muted); background:#fff; border:1px dashed var(--line); border-radius:10px; padding:10px 12px; margin:14px 0;}

/* Ads: reserve space so the page does not jump when an ad loads */
.ad{margin:20px 0; text-align:center; min-height:120px;}
.ad::before{content:"Advertisement"; display:block; font-size:.66rem; color:var(--muted); letter-spacing:.06em; text-transform:uppercase; margin-bottom:4px;}
.ad ins{display:block;}

/* Info / FAQ section */
.info h2{font-size:1.1rem; margin:28px 0 8px;}
.info details{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:12px 14px; margin:8px 0; font-size:.92rem;}
.info summary{font-weight:650; cursor:pointer;}
.info details p{margin:8px 0 0; color:#3d4d44;}

/* Footer */
footer.site{border-top:1px solid var(--line); margin-top:30px; padding:18px 16px calc(24px + env(safe-area-inset-bottom)); font-size:.8rem; color:var(--muted); text-align:center;}
footer.site nav{display:flex; flex-wrap:wrap; justify-content:center; gap:6px 16px; margin-bottom:10px;}
footer.site nav a, footer.site nav button{color:var(--green-dark); background:none; border:none; font:inherit; cursor:pointer; padding:0; text-decoration:underline;}
footer.site p{margin:4px auto; max-width:560px;}

/* Account dialog */
dialog.modal{border:none; border-radius:var(--radius); padding:0; width:min(420px, calc(100vw - 32px)); box-shadow:0 10px 40px rgba(0,0,0,.25); color:var(--ink);}
dialog.modal::backdrop{background:rgba(10,25,18,.5);}
.mhead{display:flex; justify-content:space-between; align-items:center; padding:16px 18px 0;}
.mhead h2{margin:0; font-size:1.15rem;}
.mclose{background:none; border:none; font-size:1.5rem; line-height:1; cursor:pointer; color:var(--muted); padding:4px 8px;}
.mbody{padding:12px 18px 20px; font-size:.92rem;}
.mbody p{margin:0 0 12px;}
.mbody .btn{width:100%;}
.gbtn{background:#fff; color:#1f1f1f; border:1.5px solid #c7d1cb;}
.gbtn:hover{background:#f6f8f7;}
.sep{display:flex; align-items:center; gap:10px; color:var(--muted); font-size:.8rem; margin:14px 0;}
.sep::before,.sep::after{content:""; flex:1; height:1px; background:var(--line);}
.field{display:block; margin-bottom:10px;}
.field span{display:block; font-size:.8rem; font-weight:600; margin-bottom:4px;}
.field input{width:100%; font:inherit; padding:11px 12px; border:1.5px solid #c7d1cb; border-radius:10px; background:#fff; color:var(--ink);}
.field input:focus{border-color:var(--green); outline:none;}
.linkbtn{background:none; border:none; color:var(--green-dark); text-decoration:underline; cursor:pointer; font:inherit; font-size:.85rem; padding:4px 0;}
.mlinks{display:flex; justify-content:space-between; gap:10px; margin-top:8px; flex-wrap:wrap;}
.merr{background:var(--red-bg); color:#8c1f1f; border-radius:8px; padding:8px 10px; font-size:.85rem; margin-bottom:10px;}
.mok{background:var(--green-bg); color:var(--green-dark); border-radius:8px; padding:8px 10px; font-size:.85rem; margin-bottom:10px;}
.danger{margin-top:20px; padding-top:14px; border-top:1px solid var(--line);}
.btn-danger{background:transparent; color:var(--red); border:1.5px solid var(--red);}
.fine{font-size:.76rem; color:var(--muted); margin-top:12px;}

/* Toast */
.toast{position:fixed; left:50%; bottom:calc(20px + env(safe-area-inset-bottom)); transform:translateX(-50%); background:#1a2b23; color:#fff; padding:10px 16px; border-radius:10px; font-size:.88rem; z-index:200; max-width:calc(100vw - 32px); box-shadow:var(--shadow);}

/* Static content pages (about, privacy, terms) */
.doc{padding:8px 0 20px; font-size:.95rem;}
.doc h1{font-size:1.5rem; margin:22px 0 4px;}
.doc h2{font-size:1.12rem; margin:26px 0 6px;}
.doc h3{font-size:.98rem; margin:18px 0 4px;}
.doc .updated{color:var(--muted); font-size:.82rem; margin:0 0 16px;}
.doc ul{padding-left:20px;}
.doc li{margin:4px 0;}
.doc table{border-collapse:collapse; width:100%; font-size:.85rem; margin:8px 0;}
.doc th,.doc td{border:1px solid var(--line); padding:8px; text-align:left; vertical-align:top;}
.doc th{background:#eef2ef;}

@media (prefers-reduced-motion: reduce){
  .screen{animation:none;}
  .timer.low{animation:none;}
  *{transition:none !important;}
}
button.testcard{display:block; width:100%; text-align:left; font:inherit; color:inherit;}
[hidden]{display:none !important;}