:root{
  --bg:#EEF2EF; --surface:#FFFFFF; --ink:#16231C; --muted:#4F5F56; --line:#C9D3CD;
  --green:#00653A; --green-ink:#FFFFFF; --yellow:#F5C400; --yellow-ink:#1A1A1A;
  --right:#0E7A44; --right-bg:#E3F3EA; --wrong:#B3261E; --wrong-bg:#FBE7E5; --focus:#F5C400;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0E1813; --surface:#16231C; --ink:#E8EFEA; --muted:#A3B3A9; --line:#2D3D34;
    --green:#0B7A48; --right:#5CCB8F; --right-bg:#163526; --wrong:#F2847B; --wrong-bg:#3A1C1A;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0E1813; --surface:#16231C; --ink:#E8EFEA; --muted:#A3B3A9; --line:#2D3D34;
  --green:#0B7A48; --right:#5CCB8F; --right-bg:#163526; --wrong:#F2847B; --wrong-bg:#3A1C1A;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Overpass",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:1.0625rem;line-height:1.55}
.wrap{max-width:44rem;margin:0 auto;padding:1.25rem 1rem 3rem}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:3px}

/* Guide-sign header */
.sign{background:var(--green);color:var(--green-ink);border-radius:14px;padding:6px}
.sign-inner{border:3px solid var(--green-ink);border-radius:10px;padding:1.1rem 1.25rem 1rem}
.sign-inner{text-align:center}
.sign h1{margin:0;font-size:clamp(1.6rem,5vw,2.3rem);font-weight:800;line-height:1.1;letter-spacing:.005em}
.sign p{margin:.4rem 0 0;font-size:1rem;opacity:.92}

.modes{display:grid;gap:.75rem;margin-top:1.5rem}
.mode{display:block;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:1rem 1.1rem}
.mode:hover{border-color:var(--green)}
.disc-back{position:fixed;inset:0;background:rgba(22,35,28,.72);display:flex;align-items:center;justify-content:center;padding:1rem;z-index:50;overflow-y:auto}
.disc{background:var(--surface);color:var(--ink);border-radius:14px;max-width:34rem;width:100%;padding:1.5rem 1.4rem;border-top:8px solid var(--yellow,#F5C400)}
.disc h2{margin:0 0 .75rem;font-size:1.4rem}
.disc ul{margin:0 0 1.25rem;padding-left:1.2rem;display:grid;gap:.6rem}
.disc .btn{width:100%}
.disc p{margin:0 0 1.25rem}
.disc p.note{margin:0 0 .9rem}
.disc .sublabel{display:block;font-weight:600;margin:0 0 .3rem}
.disc textarea{width:100%;box-sizing:border-box;font:inherit;padding:.6rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);resize:vertical}
.disc #sugMsg{margin:.5rem 0 .9rem;min-height:1.2em}
.disc .actions{display:flex;gap:.6rem;margin:0}
.disc .actions .btn{flex:1 1 0}
.foot{margin-top:2rem;text-align:center;color:var(--muted);font-size:.9rem}
#quiz .actions.nav{display:grid;grid-template-columns:1fr 1fr}
#quiz .actions.nav #prev{order:1}
#quiz .actions.nav #next{order:2}
#quiz .actions.nav #rand{order:3}
#quiz .actions.nav #quit{order:4}
#quiz .actions.nav #rand svg{vertical-align:-3px;margin-right:.25rem}
@media (min-width:560px){
  #quiz .actions.nav{display:flex}
  #quiz .actions.nav #quit{order:1;margin-right:auto}
  #quiz .actions.nav #rand{order:2}
  #quiz .actions.nav #prev{order:3}
  #quiz .actions.nav #next{order:4}
}
.qcount{text-align:center;margin-top:1.25rem;text-wrap:balance}
.qimg{display:flex;justify-content:center;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:.6rem;margin:0 0 .8rem}
.qimg img{display:block;height:auto;width:auto;max-width:min(100%,260px);max-height:clamp(120px,22vh,200px)}
.rimg{display:block;max-width:140px;max-height:120px;margin:.5rem 0;background:#fff;border:1px solid var(--line);border-radius:8px;padding:.4rem}
.topbar{display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem;margin:0 0 .9rem}
.themebtn{display:inline-flex;align-items:center;gap:.45rem;min-height:44px;padding:.35rem .9rem .35rem .75rem;border:1px solid var(--line);border-radius:99px;background:var(--surface);color:var(--ink);font:inherit;font-size:.92rem;font-weight:600;cursor:pointer}
.themebtn:hover{border-color:var(--green)}
.themebtn svg{flex:none}
.linkbtn{background:none;border:0;padding:.25rem;color:var(--ink);text-decoration:underline;font:inherit;cursor:pointer}
.report{margin-top:.9rem;padding-top:.75rem;border-top:1px solid var(--line)}
.report label{display:block;font-weight:600;margin-bottom:.35rem}
.report textarea{width:100%;box-sizing:border-box;font:inherit;padding:.6rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);resize:vertical}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.modegroup{background:var(--surface);border:1px solid var(--line);border-radius:10px}
.modegroup:hover,.modegroup:focus-within{border-color:var(--green)}
.modegroup .mode{border:0;background:transparent;border-radius:10px 10px 0 0}
.modegroup .mode:hover{border-color:transparent}
.modegroup .row{margin:0;padding:.1rem 1.1rem 1rem;color:var(--ink);font-weight:600}
.modegroup select{flex:1 1 9rem;min-width:0}
.btn:disabled{opacity:.45;cursor:default}
.mode:disabled{opacity:.55;cursor:default}.mode:disabled:hover{border-color:var(--line)}
.mode strong{display:block;font-size:1.15rem}
.mode span{color:var(--muted);font-size:.95rem}
.mode.primary{border:2px solid var(--green)}
.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;margin-top:1.25rem;color:var(--muted);font-size:.95rem}
select{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.35rem .5rem}
.note{color:var(--muted);font-size:.9rem;margin-top:1.5rem}

/* Quiz */
.bar{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin:1.25rem 0 .75rem;flex-wrap:wrap}
.count{font-weight:700}
.misses{display:flex;gap:5px;align-items:center}
.misses .label{color:var(--muted);font-size:.85rem;margin-right:4px}
.dia{width:16px;height:16px;transform:rotate(45deg);border:2px solid var(--yellow);border-radius:2px;background:transparent}
.dia.hit{background:var(--yellow)}
.progress{height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.progress>div{height:100%;background:var(--green);transition:width .25s}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1.25rem 1.1rem;margin-top:1rem}
.cat{color:var(--muted);font-size:.85rem}
.q{font-size:1.2rem;font-weight:700;line-height:1.35;margin:.35rem 0 1rem}
.opts{display:grid;gap:.55rem}
.opt{display:flex;gap:.75rem;align-items:flex-start;text-align:left;width:100%;background:transparent;border:1.5px solid var(--line);border-radius:9px;padding:.7rem .8rem}
.opt:hover:not(:disabled){border-color:var(--green)}
.opt .k{flex:none;width:1.6rem;height:1.6rem;border-radius:50%;border:1.5px solid var(--muted);display:grid;place-items:center;font-size:.85rem;font-weight:700}
.opt:disabled{cursor:default}
.opt.right{border-color:var(--right);background:var(--right-bg)}
.opt.right .k{background:var(--right);border-color:var(--right);color:var(--surface)}
.opt.wrong{border-color:var(--wrong);background:var(--wrong-bg)}
.opt.wrong .k{background:var(--wrong);border-color:var(--wrong);color:var(--surface)}
.fb{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--line)}
.fb .verdict{font-weight:800}
.fb .verdict.ok{color:var(--right)} .fb .verdict.no{color:var(--wrong)}
.fb p{margin:.3rem 0 0}
.fb .src{color:var(--muted);font-size:.88rem}
.actions{display:flex;gap:.6rem;justify-content:space-between;margin-top:1.1rem;flex-wrap:wrap}
.btn{border-radius:9px;padding:.65rem 1.1rem;font-weight:700;border:1.5px solid var(--line);background:var(--surface)}
.btn.go{background:var(--green);border-color:var(--green);color:var(--green-ink)}
.btn.ghost{background:transparent}

/* Results */
.result{margin-top:1.25rem}
.result h2{font-size:1.7rem;margin:.2rem 0}
.badge{display:inline-block;font-weight:800;padding:.2rem .7rem;border-radius:6px}
.badge.pass{background:var(--right-bg);color:var(--right)}
.badge.fail{background:var(--wrong-bg);color:var(--wrong)}
.review{margin-top:1.25rem;display:grid;gap:.75rem}
.review .item{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--wrong);border-radius:8px;padding:.85rem 1rem}
.review .item .qq{font-weight:700}
.review .item p{margin:.3rem 0 0;font-size:.97rem}
.hidden{display:none}
@media (prefers-reduced-motion: reduce){.progress>div{transition:none}}
a.mode{display:block}
.foot a{color:var(--muted)}