:root{
  --sign:#2C3E50; --sign-deep:#1F2D3B; --blue:#0F5FF8; --blue-deep:#0B4CD0; --strip:#2980B9;
  --white:#FFFFFF; --road:#F2F2F2; --ink:#1E2A36; --muted:#5A6672; --line:#D5DAE0; --caution:#F3C300;
  --ok:#0A7A45; --ok-bg:#E3F3EA; --bad:#B42318; --bad-bg:#FBE7E5;
  --font:"Fira Sans","Open Sans",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--road);color:var(--ink);font-family:var(--font);font-size:18px;line-height:1.55}
a{color:var(--blue)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--caution);outline-offset:3px}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}

/* Top bar */
.strip{background:var(--strip);color:var(--white);text-align:center;font-size:15px;padding:8px 16px}
.strip a{color:var(--white);font-weight:700}
.top{background:var(--white);color:var(--ink);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;padding-bottom:12px}
.brand{color:var(--ink);text-decoration:none;font-weight:800;font-size:22px;letter-spacing:.01em;display:flex;align-items:center;gap:10px}
.brand .shield{display:inline-grid;place-items:center;width:34px;height:36px;background:var(--blue);color:var(--white);border-radius:8px 8px 14px 14px;font-size:12px;font-weight:800}
.brand .hl{color:var(--blue)}
.top nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:16px}
.top nav a:hover{text-decoration:underline}

/* Guide-sign panel: the one signature element */
.sign{background:var(--sign);color:var(--white);border-radius:14px;padding:8px}
.sign-inner{border:3px solid var(--white);border-radius:9px;padding:28px 28px 26px}
.hero{padding:36px 0 10px}
.hero h1{font-size:clamp(34px,6vw,56px);line-height:1.02;margin:0 0 14px;font-weight:800;letter-spacing:-.01em}
.hero p{margin:0;font-size:20px;max-width:34ch}

.exits{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:18px}
.exit{position:relative}
.exit a{display:block;text-decoration:none;color:var(--white)}
.exit .sign{transition:background .15s}
.exit a:hover .sign{background:var(--sign-deep)}
.exit .tab{position:absolute;top:-14px;right:22px;background:var(--sign);color:var(--white);border:3px solid var(--white);border-radius:6px;padding:2px 10px;font-weight:800;font-size:14px;letter-spacing:.04em}
.exit h2{margin:0;font-size:28px;font-weight:800;line-height:1.1}
.exit p{margin:6px 0 0;font-size:16px;opacity:.92}
.exit .meta{margin-top:10px;font-size:15px;font-weight:600}
.exit .best{display:inline-block;margin-left:8px;background:var(--caution);color:var(--ink);border-radius:4px;padding:0 6px;font-weight:800}

section.info{padding:44px 0 10px}
section.info h2{font-size:28px;margin:0 0 10px;font-weight:800}
section.info p{max-width:62ch;margin:0 0 14px}

.cta{margin:36px 0;background:var(--sign);color:var(--white);border-radius:14px;padding:26px 28px}
.cta h2{margin:0 0 6px;font-size:26px;font-weight:800}
.cta p{margin:0 0 16px;max-width:56ch}
.btn{display:inline-block;font:inherit;font-weight:800;font-size:18px;border:0;border-radius:8px;padding:12px 20px;cursor:pointer;text-decoration:none}
.btn-dark{background:var(--blue);color:var(--white)}
.btn-dark:hover{background:var(--blue-deep)}
.btn-sign{background:var(--blue);color:var(--white)}
.btn-sign:hover{background:var(--blue-deep)}
.btn-ghost{background:transparent;color:var(--blue);border:2px solid var(--blue)}

footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0 40px;font-size:15px;color:var(--muted)}
footer p{margin:0 0 8px;max-width:70ch}

/* Test page */
.test-head{padding:30px 0 6px}
.test-head h1{font-size:clamp(30px,5vw,44px);line-height:1.05;margin:0 0 10px;font-weight:800}
.test-head p{margin:0;color:var(--muted);max-width:60ch}
.quiz{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:24px;margin:22px 0}
.lane{height:10px;background:#D8DDD9;border-radius:5px;overflow:hidden;position:relative}
.lane span{display:block;height:100%;background:var(--blue);width:0;transition:width .25s}
.count{font-size:15px;color:var(--muted);margin:10px 0 4px;font-weight:600}
.quiz h2{font-size:24px;line-height:1.3;margin:6px 0 18px;font-weight:700}
.opts{display:grid;gap:10px}
.opt{text-align:left;font:inherit;font-size:18px;background:var(--white);color:var(--ink);border:2px solid var(--line);border-radius:10px;padding:14px 16px;cursor:pointer;line-height:1.35}
.opt:hover:not(:disabled){border-color:var(--blue)}
.opt:disabled{cursor:default}
.opt.right{border-color:var(--ok);background:var(--ok-bg)}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt .mark{float:right;font-weight:800;margin-left:10px}
.why{margin-top:16px;padding:14px 16px;border-left:5px solid var(--blue);background:#F2F6FE;border-radius:0 8px 8px 0}
.why strong{display:block;margin-bottom:2px}
.actions{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}
.score{font-size:64px;font-weight:800;line-height:1;margin:6px 0}
.verdict{font-size:22px;font-weight:800;margin:0 0 8px}
.verdict.pass{color:var(--ok)} .verdict.fail{color:var(--bad)}
.next{margin:20px 0 6px;background:var(--sign);color:var(--white);border-radius:12px;padding:20px 22px}
.next h3{margin:0 0 6px;font-size:22px;font-weight:800}
.next p{margin:0 0 14px}
.next .alt{margin:12px 0 0;font-size:16px}
.next .alt a{color:var(--white);font-weight:700}
.missed{margin:18px 0 0;padding:0;list-style:none}
.missed li{border-top:1px solid var(--line);padding:12px 0}
.missed .ans{color:var(--ok);font-weight:700}

details.study{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:6px 22px;margin:22px 0}
details.study summary{cursor:pointer;font-weight:800;font-size:20px;padding:14px 0}
.study ol{padding-left:22px}
.study li{margin:0 0 16px}
.study .ans{color:var(--ok);font-weight:700}
.study .exp{color:var(--muted);font-size:16px}
.more{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 0;padding:0;list-style:none}
.more a{display:inline-block;background:var(--white);border:1px solid var(--line);border-radius:8px;padding:8px 12px;text-decoration:none;font-weight:600;font-size:16px}

@media (max-width:560px){
  body{font-size:17px}
  .sign-inner{padding:22px 18px}
  .quiz{padding:18px}
  .quiz h2{font-size:21px}
  .score{font-size:52px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---------- v2: engagement features ---------- */
#confetti{position:fixed;inset:0;pointer-events:none;display:none;z-index:50}
.sign-inner{position:relative}

/* Yellow diamond: warning-sign motif for badges and question of the day */
.diamond,.badge{display:grid;place-items:center;background:var(--caution);border:3px solid var(--ink);border-radius:6px;transform:rotate(45deg)}
.diamond span,.badge span{transform:rotate(-45deg);font-weight:800;color:var(--ink)}
.badge{position:absolute;top:18px;right:20px;width:34px;height:34px}
.badge[hidden]{display:none}
.badge span{font-size:18px}
.badge.big{position:static;width:56px;height:56px}
.badge.big span{font-size:28px}

/* Progress dashboard */
.dash{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:20px 0 0}
.dash-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.dash p{margin:10px 0 0;font-size:16px;color:var(--muted)}
.streak{display:inline-block;background:#FFF4CC;color:var(--ink);border-radius:20px;padding:2px 10px;font-weight:700;font-size:15px;white-space:nowrap}

/* Question of the day */
.qotd{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;background:var(--white);border:3px solid var(--caution);border-radius:14px;padding:22px;margin:28px 0 8px}
.qotd .diamond{width:52px;height:52px;margin:8px 6px 0}
.qotd .diamond span{font-size:26px}
.qotd h2{margin:0;font-size:24px;font-weight:800}
.qotd-from{margin:2px 0 8px;font-size:15px;color:var(--muted);font-weight:600}
.qotd-q{font-size:20px;font-weight:700;line-height:1.35;margin:0 0 14px}
@media (max-width:560px){.qotd{grid-template-columns:1fr;gap:10px}.qotd .diamond{width:40px;height:40px;margin:6px}.qotd .diamond span{font-size:20px}}

/* Mode picker */
.menu-h{font-size:24px;margin:0 0 6px;font-weight:800}
.modes{display:grid;gap:12px;margin-top:14px}
.mode{display:block;text-align:left;font:inherit;background:var(--white);color:var(--ink);border:2px solid var(--line);border-left:8px solid var(--blue);border-radius:10px;padding:14px 16px;cursor:pointer}
.mode:hover{border-color:var(--blue)}
.mode strong{display:block;font-size:20px}
.mode span{display:block;color:var(--muted);font-size:16px}
.mode-warn{border-left-color:var(--caution)}

/* Question screen */
.qbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:10px}
.pill{background:#E8EFFE;color:var(--blue-deep);border-radius:20px;padding:3px 12px;font-weight:700;font-size:14px}
.say{font:inherit;font-size:15px;font-weight:600;background:none;border:1px solid var(--line);border-radius:20px;padding:4px 12px;cursor:pointer;color:var(--ink)}
.opt{display:flex;align-items:flex-start;gap:12px}
.opt .key{flex:none;display:inline-grid;place-items:center;width:28px;height:28px;border-radius:6px;background:var(--road);font-weight:800;font-size:15px}
.opt .mark{margin-left:auto}
.opt.right .key{background:var(--ok);color:var(--white)}
.opt.wrong .key{background:var(--bad);color:var(--white)}
.opt.picked{border-color:var(--blue);background:#E8EFFE}

/* Results */
.result{display:flex;align-items:center;gap:22px;margin-top:8px}
.missed .yours{color:var(--bad);font-size:16px}
.missed .exp{color:var(--muted);font-size:16px}

/* Partner ads */
.partners{margin:36px 0 10px}
.partners h2,.more-h{font-size:24px;font-weight:800;margin:0 0 12px}
.plist{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.pcard{display:flex;flex-direction:column;gap:4px;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--ink)}
.pcard:hover{border-color:var(--blue)}
.ptag{align-self:flex-start;font-size:12px;font-weight:700;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:0 6px}
.pcard strong{font-size:20px}
.pkind{font-size:14px;color:var(--muted);font-weight:600}
.ptext{font-size:16px;flex:1}
.pcta{margin-top:6px;font-weight:800;color:var(--blue)}

/* ---------- v3 ---------- */
.top nav{display:flex;gap:16px}
.shield-img{display:block;width:44px;height:44px;object-fit:contain;margin-bottom:10px}
.cta .alt{margin:14px 0 0;font-size:16px}
.cta .alt a{color:var(--white);font-weight:700}
.pimg{display:grid;place-items:center;height:110px;background:var(--road);border-radius:8px;overflow:hidden;margin:4px 0 6px}
.pimg img{max-width:100%;max-height:110px;object-fit:contain}
.statepick{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:6px 0 14px}
.statepick label{font-weight:700}
.statepick select{font:inherit;font-size:18px;padding:10px 12px;border:2px solid var(--line);border-radius:8px;background:var(--white);color:var(--ink);min-width:220px}
.steps{padding-left:22px;max-width:64ch}
.steps li{margin:0 0 12px}
ul.states{margin-top:16px}

/* ---------- v4: course ---------- */
.top nav{gap:14px}
.top nav a{font-size:15px}
.course-banner{display:flex;gap:16px;align-items:center;background:var(--blue);color:var(--white);text-decoration:none;border-radius:14px;padding:18px 20px;margin:20px 0 6px}
.course-banner:hover{background:var(--blue-deep)}
.course-banner strong{display:block;font-size:20px}
.cb-num{flex:none;display:grid;place-items:center;width:54px;height:54px;border:3px solid var(--white);border-radius:10px;font-weight:800;font-size:24px}
.studyfirst{margin-top:8px!important}
.lessons{list-style:none;padding:0;margin:20px 0;display:grid;gap:10px}
.lessons a{display:flex;gap:14px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.lessons a:hover{border-color:var(--blue)}
.lnum{flex:none;display:grid;place-items:center;width:36px;height:36px;border-radius:8px;background:var(--sign);color:var(--white);font-weight:800}
.ltxt{flex:1}
.ltxt strong{display:block;font-size:18px;line-height:1.3}
.ltxt span{display:block;font-size:15px;color:var(--muted)}
.ldone{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--ok);color:var(--white);font-weight:800}
.ldone[hidden]{display:none}
.crumb{margin:24px 0 10px;font-size:15px;color:var(--muted)}
.lesson-lane{margin-bottom:18px}
.lesson{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:24px}
.lesson h1{font-size:clamp(28px,5vw,40px);line-height:1.1;margin:0 0 6px;font-weight:800}
.lmeta{color:var(--muted);font-size:15px;margin:0 0 16px}
.lesson p{max-width:65ch;margin:0 0 16px}
.keys{background:#FFF8DC;border-left:6px solid var(--caution);border-radius:0 10px 10px 0;padding:14px 18px;margin-top:20px}
.keys h2{margin:0 0 6px;font-size:20px;font-weight:800}
.keys ul{margin:0;padding-left:20px}
.keys li{margin:4px 0}
.lnav{display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between;margin:10px 0 0}
.cert-wrap{background:var(--white);border:3px solid var(--caution);border-radius:14px;padding:22px;margin:20px 0}
.cert-wrap h2{margin:0 0 6px;font-size:26px;font-weight:800}
.cert-wrap input{font:inherit;font-size:18px;width:100%;max-width:420px;padding:10px 12px;border:2px solid var(--line);border-radius:8px;margin:6px 0 16px}
.cert{background:var(--sign);color:var(--white);border-radius:14px;padding:8px;margin-bottom:16px}
.cert-inner{border:3px solid var(--white);border-radius:9px;padding:28px 20px;text-align:center}
.cert .diamond{width:46px;height:46px;margin:6px auto 14px}
.cert-k{font-size:18px;font-weight:700;color:var(--caution);margin:0}
.cert-name{font-size:clamp(28px,6vw,42px);font-weight:800;margin:8px 0;border-bottom:2px solid rgba(255,255,255,.4);display:inline-block;padding:0 12px 4px}
.cert-date{font-weight:700}
.cert-note{font-size:13px;opacity:.8;margin-top:14px}
@media print{
  body *{visibility:hidden}
  .cert,.cert *{visibility:visible}
  .cert{position:fixed;inset:0;margin:0;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .cert-inner{height:100%;display:flex;flex-direction:column;justify-content:center}
}
@media (max-width:560px){
  .top .wrap{flex-wrap:wrap;row-gap:6px;padding-top:10px;padding-bottom:8px}
  .top nav{width:100%;justify-content:space-between;border-top:1px solid var(--line);padding-top:8px}
  .top nav a{font-size:16px}
}

/* ---------- v5: ebook ads ---------- */
.ebook{position:relative;background:var(--white);border:2px solid var(--blue);border-radius:14px;padding:16px;margin:28px 0}
.ebook .ptag{position:absolute;top:12px;right:12px}
.ebook-in{display:grid;grid-template-columns:110px 1fr;gap:18px;align-items:center;text-decoration:none;color:var(--ink)}
.ebook-cover img{width:110px;height:auto;border-radius:6px;box-shadow:0 4px 14px rgba(0,0,0,.2);display:block}
.ebook-txt{display:flex;flex-direction:column;gap:4px;align-items:flex-start}
.ebook-from{font-size:14px;font-weight:700;color:var(--blue)}
.ebook-txt strong{font-size:20px;line-height:1.25;padding-right:34px}
.ebook-price{color:var(--muted);font-size:16px;margin-bottom:6px}
.ebook .btn{font-size:16px;padding:10px 16px}

/* ---------- v6: smaller ads, simpler footer ---------- */
.ebook{padding:14px}
.ebook-in{grid-template-columns:84px 1fr;gap:14px}
.ebook-cover img{width:84px;height:110px;object-fit:cover}
.ebook-txt strong{font-size:17px}
.ebook-price{font-size:15px}
footer p{font-size:14px}
.flinks{display:flex;flex-wrap:wrap;gap:6px 18px}