/* HLE FOR HUMAN — hard monochrome */
:root{
  --ink:#111;
  --paper:#fafafa;
  --gray:#888;
  --hair:#e2e2e2;
  --mono:ui-monospace,"Cascadia Mono","JetBrains Mono",Consolas,monospace;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;border-radius:0!important}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
::selection{background:var(--ink);color:var(--paper)}
a{color:var(--ink)}
img{max-width:100%}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;justify-content:space-between;align-items:center;
  padding:0 20px;height:52px;
  background:var(--paper);
  border-bottom:2px solid var(--ink);
}
.brand{font-family:var(--mono);font-weight:700;letter-spacing:.12em;font-size:15px}
.brand-sep{color:var(--gray);margin:0 4px}
.topbar-right{display:flex;align-items:center;gap:12px}
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.15em;color:var(--gray)}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--mono);font-size:14px;letter-spacing:.1em;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);
  padding:10px 22px;cursor:pointer;
  transition:background .12s,color .12s;
}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn:disabled{opacity:.3;cursor:not-allowed}
.btn:disabled:hover{background:var(--paper);color:var(--ink)}
.btn-big{font-size:16px;padding:14px 40px;font-weight:700}
.btn-small{padding:5px 14px;font-size:12px}
.hidden{display:none!important}

/* ---------- views ---------- */
.view{min-height:calc(100vh - 52px)}
main{max-width:1080px;margin:0 auto;padding:0 20px}

/* ---------- home hero (parallax zone) ---------- */
.hero{
  position:relative;overflow:hidden;
  border-bottom:2px solid var(--ink);
  padding:96px 24px 80px;
  margin:0 -20px;
}
.hero-grid,.band-grid{
  position:absolute;inset:-60px;
  background-image:
    repeating-linear-gradient(0deg,var(--hair) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,var(--hair) 0 1px,transparent 1px 48px);
  will-change:transform;
}
.hero-ghost{
  position:absolute;right:-2%;top:50%;
  transform:translateY(-50%);
  font-family:var(--sans);font-weight:900;
  font-size:min(38vw,420px);line-height:1;
  color:transparent;
  -webkit-text-stroke:1.5px var(--hair);
  user-select:none;pointer-events:none;
  will-change:transform;
}
.hero-inner{position:relative;max-width:760px}
.kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.3em;
  border-left:4px solid var(--ink);padding-left:10px;margin-bottom:28px;
}
h1{
  font-size:clamp(40px,7vw,76px);line-height:1.05;
  font-weight:900;letter-spacing:-.01em;margin-bottom:24px;
}
.h1-sub{font-size:.55em;font-weight:700;color:var(--gray)}
.lede{font-size:15px;color:#333;margin-bottom:40px}

.config{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.config-row{display:flex;align-items:center;gap:14px}
.config-label{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--gray)}
.seg{display:flex;border:2px solid var(--ink)}
.seg button{
  font-family:var(--mono);font-size:14px;
  background:var(--paper);border:none;border-right:2px solid var(--ink);
  padding:10px 18px;cursor:pointer;
}
.seg button:last-child{border-right:none}
.seg button.on{background:var(--ink);color:var(--paper)}
.seg-mini{border-width:2px}
.seg-mini button{padding:4px 12px;font-size:11px;letter-spacing:.08em}

.bestline{
  margin-top:28px;font-family:var(--mono);font-size:12px;
  letter-spacing:.12em;color:var(--gray);
}

/* ---------- collapsible intro ---------- */
.hle-intro{
  border:2px solid var(--ink);
  margin:48px 0 64px;
  background:var(--paper);
}
.hle-intro summary{
  list-style:none;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
  padding:16px 20px;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.2em;
}
.hle-intro summary::-webkit-details-marker{display:none}
.hle-intro summary:hover{background:var(--ink);color:var(--paper)}
.sum-mark{font-size:18px;font-weight:400}
.hle-intro[open] .sum-mark{transform:rotate(45deg)}
.intro-body{border-top:2px solid var(--ink);padding:24px 20px;font-size:14px;color:#222}
.intro-body h3{
  font-family:var(--mono);font-size:12px;letter-spacing:.25em;
  margin:20px 0 8px;padding-left:10px;border-left:4px solid var(--ink);
}
.intro-body h3:first-child{margin-top:0}
.intro-body p{margin-bottom:8px}

/* ---------- quiz ---------- */
.quiz-head{
  position:sticky;top:52px;z-index:40;background:var(--paper);
  padding:18px 0 12px;border-bottom:2px solid var(--ink);
  margin-bottom:32px;
}
.quiz-meta{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px}
.q-progress{font-family:var(--mono);font-size:22px;font-weight:700;letter-spacing:.1em}
.q-cat{font-family:var(--mono);font-size:11px;letter-spacing:.15em;color:var(--gray);text-align:right}
.progress-track{height:6px;background:var(--hair)}
.progress-bar{height:100%;background:var(--ink);width:0;transition:width .2s}

.quiz-body{max-width:860px;margin:0 auto;padding-bottom:24px;min-height:45vh}
.q-stem{font-size:16px;line-height:1.8;white-space:pre-wrap;word-break:break-word}
.q-imgwrap{margin:20px 0;border:2px solid var(--ink);padding:8px;background:#fff}
.q-imgwrap img{display:block;max-height:420px;margin:0 auto}

.q-options{margin-top:28px;display:flex;flex-direction:column;gap:0;border:2px solid var(--ink)}
.opt{
  display:flex;gap:16px;align-items:flex-start;
  padding:14px 16px;background:var(--paper);
  border:none;border-bottom:2px solid var(--ink);
  font-family:var(--sans);font-size:15px;text-align:left;cursor:pointer;
  transition:background .1s,color .1s;
}
.opt:last-child{border-bottom:none}
.opt:hover{background:#eee}
.opt.sel{background:var(--ink);color:var(--paper)}
.opt-letter{font-family:var(--mono);font-weight:700;flex:0 0 22px}
.opt-text{flex:1;line-height:1.6}

.q-inputwrap{margin-top:28px}
#q-input{
  width:100%;padding:14px 16px;
  font-family:var(--mono);font-size:16px;
  border:2px solid var(--ink);background:#fff;color:var(--ink);
  outline:none;
}
#q-input:focus{box-shadow:6px 6px 0 var(--ink)}

.quiz-nav{
  display:flex;justify-content:space-between;align-items:center;
  border-top:2px solid var(--ink);padding:20px 0 48px;
  max-width:860px;margin:0 auto;
}
.answered-count{font-family:var(--mono);font-size:12px;letter-spacing:.15em;color:var(--gray)}

/* ---------- result ---------- */
.score-band{
  position:relative;overflow:hidden;
  border-bottom:2px solid var(--ink);
  margin:0 -20px;
  padding:72px 24px;
}
.band-inner{position:relative;text-align:center}
.score-num{
  font-family:var(--mono);font-weight:700;
  font-size:clamp(56px,10vw,110px);line-height:1;letter-spacing:-.02em;
}
.score-sub{font-family:var(--mono);font-size:13px;letter-spacing:.15em;color:var(--gray);margin-top:14px}
.score-band .kicker{border:none;padding-left:0;letter-spacing:.4em}

/* AI-risk fun warning (shown only when human verification ran) */
.ai-warning{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  border:2px solid #c81616;
  padding:12px 16px;margin:20px 0;
  font-family:var(--mono);font-size:14px;font-weight:700;
  color:#c81616;letter-spacing:.05em;
}
.aiw-close{
  background:none;border:none;color:#c81616;
  font-family:var(--mono);font-size:18px;font-weight:700;line-height:1;
  cursor:pointer;padding:0 4px;flex:0 0 auto;
}
.aiw-close:hover{background:#c81616;color:#fff}

.result-rank{
  border:2px solid var(--ink);border-top:none;
  padding:18px 20px;margin-bottom:48px;
  font-family:var(--mono);font-size:14px;letter-spacing:.05em;text-align:center;
}
.result-rank b{font-size:18px}

.sec-title{
  font-size:22px;font-weight:900;letter-spacing:.02em;
  border-left:8px solid var(--ink);padding-left:14px;margin:48px 0 20px;
}
.chart-wrap{border:2px solid var(--ink);background:#fff;margin-bottom:48px}
.chart-scroll{overflow-x:auto;padding:24px 16px 8px}
.chart-legend{
  display:flex;flex-wrap:wrap;gap:24px;
  border-top:2px solid var(--ink);padding:12px 16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:#333;
}
.lg{display:inline-block;width:14px;height:14px;margin-right:6px;vertical-align:-2px}
.lg-you{background:var(--ink)}
.lg-llm{background:#cfcfcf;border:1px solid #999}
.lg-avg{background:repeating-linear-gradient(90deg,var(--ink) 0 3px,transparent 3px 6px);height:2px;vertical-align:4px}

/* review */
.review{display:flex;flex-direction:column;gap:16px;margin-bottom:48px}
.rv{border:2px solid var(--ink);background:#fff}
.rv-head{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:10px 16px;border-bottom:2px solid var(--ink);
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;
}
.rv-mark{font-weight:700;font-size:14px}
.rv.bad .rv-head{background:var(--ink);color:var(--paper)}
.rv.ungraded .rv-head{background:var(--hair);color:var(--ink)}
.rv-cat{color:inherit;opacity:.6}
.rv-body{padding:16px}
.rv-q{font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word;max-height:220px;overflow-y:auto;border-left:4px solid var(--hair);padding-left:14px;margin-bottom:14px}
.rv-img{border:2px solid var(--ink);padding:6px;margin-bottom:14px;background:#fff}
.rv-img img{display:block;max-height:260px;margin:0 auto}
.rv-ans{display:flex;flex-wrap:wrap;gap:10px 32px;font-family:var(--mono);font-size:13px;margin-bottom:12px}
.rv-ans .lab{color:var(--gray);font-size:11px;letter-spacing:.15em;display:block}
.rv details{border-top:1px dashed var(--gray);padding-top:10px}
.rv summary{cursor:pointer;font-family:var(--mono);font-size:12px;letter-spacing:.15em;color:var(--gray)}
.rv summary:hover{color:var(--ink)}
.rv-rationale{margin-top:10px;font-size:13px;line-height:1.7;color:#333;white-space:pre-wrap;word-break:break-word}

.result-actions{display:flex;gap:16px;justify-content:center;margin-bottom:64px;flex-wrap:wrap}

/* ---------- captcha modal ---------- */
.modal{
  position:fixed;inset:0;z-index:100;
  background:rgba(250,250,250,.94);
  display:flex;align-items:center;justify-content:center;
  padding:20px;
}
#captcha-box{background:#fff;border:3px solid var(--ink);box-shadow:10px 10px 0 var(--ink);padding:16px;min-height:110px}
.grading-box{
  background:#fff;border:3px solid var(--ink);box-shadow:10px 10px 0 var(--ink);
  padding:26px 40px;
  font-family:var(--mono);font-size:14px;font-weight:700;letter-spacing:.2em;
}

/* ---------- footer ---------- */
.footer{
  border-top:2px solid var(--ink);
  display:flex;justify-content:space-between;gap:16px 40px;flex-wrap:wrap;
  padding:16px 20px;
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;line-height:1.8;color:var(--gray);
}
.footer p{margin:0 0 6px;}
.footer .canary{color:var(--ink);font-weight:700;margin:0;}
.footer .foot-legal{max-width:520px;}
.footer .attrib{margin:0;padding:0;list-style:none;}
.footer .attrib li{margin:0 0 2px;}

/* ---------- responsive ---------- */
@media (max-width:760px){
  .hero{padding:64px 20px 56px}
}
@media (max-width:640px){
  main{padding:0 12px}
  /* top bar: drop the decorative tag, tighten the rest */
  .topbar{padding:0 12px}
  .topbar-right{gap:8px}
  .tag{display:none}
  .brand{font-size:13px}
  .seg-mini button{padding:4px 9px}
  /* hero */
  .hero{padding:52px 14px 44px;margin:0 -12px}
  .kicker{font-size:10px;letter-spacing:.18em;margin-bottom:20px}
  h1{font-size:clamp(32px,9vw,44px);margin-bottom:18px}
  .lede{font-size:14px;margin-bottom:30px}
  .lede br{display:none}
  .config{flex-direction:column;align-items:stretch;gap:16px}
  .config-row{justify-content:space-between}
  .config .btn-big{width:100%;padding:14px 20px}
  .bestline{font-size:11px;margin-top:22px}
  /* intro */
  .hle-intro{margin:32px 0 48px}
  .hle-intro summary{padding:14px;font-size:12px;letter-spacing:.12em}
  .intro-body{padding:18px 14px;font-size:13px}
  /* quiz */
  .quiz-head{padding:12px 0 10px;margin-bottom:22px}
  .q-progress{font-size:18px}
  .q-cat{font-size:10px;max-width:60%}
  .q-stem{font-size:15px;line-height:1.75}
  .q-imgwrap img{max-height:300px}
  .opt{padding:12px;gap:10px;font-size:14px}
  .opt-letter{flex:0 0 18px}
  #q-input{padding:12px;font-size:15px}
  .quiz-nav{padding:14px 0 40px}
  .quiz-nav .btn{padding:10px 14px;font-size:12px}
  .answered-count{font-size:10px;letter-spacing:.08em;text-align:center}
  /* result */
  .score-band{padding:52px 14px;margin:0 -12px}
  .score-sub{font-size:11px;letter-spacing:.1em}
  .ai-warning{font-size:12px;padding:10px 12px}
  .result-rank{padding:14px 12px;font-size:12px;margin-bottom:36px}
  .sec-title{font-size:18px;border-left-width:6px;margin:36px 0 16px}
  .chart-scroll{padding:16px 8px 4px}
  .chart-legend{gap:10px 16px;font-size:10px;padding:10px 12px}
  .rv-head{padding:8px 10px;font-size:10px;letter-spacing:.05em}
  .rv-body{padding:12px}
  .rv-q{font-size:13px;max-height:180px}
  .rv-ans{gap:8px 20px;font-size:12px}
  .result-actions .btn-big{width:100%}
  .result-actions .btn{width:100%}
  /* modals */
  .modal{padding:8px}
  #captcha-box{padding:8px;box-shadow:6px 6px 0 var(--ink)}
  .grading-box{padding:18px 24px;font-size:12px;box-shadow:6px 6px 0 var(--ink)}
  /* footer */
  .footer{padding:14px 12px;font-size:9px}
  .footer .foot-legal{max-width:none}
}