/* Likhit Exam Nepal — stylesheet
   Theme: road/highway inspired. Asphalt charcoal + road-marking yellow + sign red.
   System fonts only (no external font imports, fast load, CLS-safe). */

:root{
  --asphalt:#1f2328;
  --asphalt-soft:#2c3138;
  --road-yellow:#f4b400;
  --road-yellow-dark:#c98f00;
  --sign-red:#d1392b;
  --sign-green:#1f8a4c;
  --paper:#faf8f3;
  --paper-dim:#f0ede4;
  --ink:#1f2328;
  --ink-soft:#5a5f66;
  --line:#e1ddd0;
  --radius:10px;
  --shadow:0 2px 10px rgba(31,35,40,.08);
  font-size:16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.hide{display:none !important}

/* ---------- Dashed road-line divider (signature element) ---------- */
.road-divider{
  height:6px;
  background-image:repeating-linear-gradient(90deg,var(--road-yellow) 0 28px,transparent 28px 46px);
  border-radius:3px;
  margin:0 auto;
}

/* ---------- Header ---------- */
.site-header{
  background:var(--asphalt);
  color:#fff;
  position:sticky;
  top:0;
  z-index:50;
  border-bottom:3px solid var(--road-yellow);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;letter-spacing:.2px}
.brand-badge{
  background:var(--road-yellow);color:var(--asphalt);font-weight:900;font-size:.75rem;
  padding:4px 8px;border-radius:6px;letter-spacing:.5px;
}
.nav-links{display:flex;gap:18px;font-size:.92rem}
.nav-links a{text-decoration:none;color:#e8e6df;opacity:.9}
.nav-links a:hover{opacity:1;color:var(--road-yellow)}
.icon-btn{background:none;border:1px solid rgba(255,255,255,.25);color:#fff;padding:6px 10px;border-radius:8px;font-size:.85rem;cursor:pointer}
@media (max-width:640px){.nav-links{display:none}}

/* ---------- Hero ---------- */
.hero{
  background:var(--asphalt);
  color:#fff;
  padding:44px 0 34px;
  text-align:center;
}
.hero .road-divider{margin-bottom:22px;max-width:280px}
.hero h1{
  font-size:clamp(1.7rem,4.5vw,2.5rem);
  margin:0 0 12px;
  font-weight:800;
  letter-spacing:-.3px;
}
.hero p.lead{
  color:#cfd2d6;
  max-width:640px;
  margin:0 auto 22px;
  font-size:1.02rem;
}
.hero-stats{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;margin:20px 0 26px;font-size:.88rem;color:#cfd2d6}
.hero-stats b{color:var(--road-yellow);font-size:1.05rem;display:block}

.category-select{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}
.category-chip{
  background:var(--asphalt-soft);
  border:1.5px solid rgba(255,255,255,.15);
  color:#fff;
  padding:9px 18px;
  border-radius:999px;
  font-weight:600;
  font-size:.9rem;
  cursor:pointer;
}
.category-chip.active{background:var(--road-yellow);color:var(--asphalt);border-color:var(--road-yellow)}

.btn{
  display:inline-block;
  border:none;
  border-radius:8px;
  padding:14px 28px;
  font-weight:700;
  font-size:1rem;
  cursor:pointer;
  text-decoration:none;
}
.btn-primary{background:var(--road-yellow);color:var(--asphalt)}
.btn-primary:hover{background:var(--road-yellow-dark)}
.btn-secondary{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35)}
.btn-outline{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- Sticky mobile CTA ---------- */
.sticky-cta{
  position:fixed;bottom:0;left:0;right:0;
  background:var(--asphalt);
  padding:10px 16px;
  display:flex;gap:10px;
  z-index:60;
  box-shadow:0 -4px 14px rgba(0,0,0,.2);
  border-top:2px solid var(--road-yellow);
}
.sticky-cta .btn{flex:1;text-align:center;padding:12px}
@media (min-width:900px){.sticky-cta{display:none}}

/* ---------- Sections ---------- */
section{padding:48px 0}
section.alt{background:var(--paper-dim)}
.section-head{text-align:center;max-width:640px;margin:0 auto 30px}
.eyebrow{
  color:var(--sign-red);
  font-weight:800;
  font-size:.78rem;
  letter-spacing:1.2px;
  text-transform:uppercase;
}
.section-head h2{font-size:clamp(1.4rem,3vw,1.9rem);margin:6px 0 8px}
.section-head p{color:var(--ink-soft);margin:0}

/* ---------- Test cards ---------- */
.test-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.test-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);
}
.test-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:8px;
  background:var(--asphalt);color:var(--road-yellow);font-weight:800;margin-bottom:10px;
}
.test-card h3{margin:0 0 6px;font-size:1.05rem}
.test-card p{color:var(--ink-soft);font-size:.88rem;margin:0 0 14px}
.test-card .meta{display:flex;gap:12px;font-size:.78rem;color:var(--ink-soft);margin-bottom:14px}
.test-card.locked{opacity:.55}
.badge-soon{background:var(--paper-dim);border:1px dashed var(--line);color:var(--ink-soft);font-size:.72rem;padding:3px 8px;border-radius:6px}

/* ---------- Features grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.feature .ico{font-size:1.4rem;margin-bottom:8px}
.feature h4{margin:0 0 6px;font-size:.98rem}
.feature p{margin:0;color:var(--ink-soft);font-size:.86rem}

/* ---------- Exam info table ---------- */
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:26px}
.info-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center}
.info-box .val{font-size:1.5rem;font-weight:800;color:var(--asphalt)}
.info-box .lbl{font-size:.78rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.4px}
.tips-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px}
.tips-list li{margin-bottom:8px}
.note-callout{
  background:#fff7e0;border:1px solid #f0d68a;border-radius:var(--radius);
  padding:12px 16px;font-size:.85rem;color:#6b5100;margin-top:14px;
}

/* ---------- Resource / sign cards ---------- */
.resource-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.resource-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center}
.sign-swatch{
  width:56px;height:56px;border-radius:50%;margin:0 auto 10px;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.3rem;
}
.sign-prohibit{background:#fff;border:4px solid var(--sign-red);color:var(--sign-red)}
.sign-warning{background:var(--road-yellow);border:4px solid var(--asphalt);color:var(--asphalt);border-radius:4px;transform:rotate(0deg)}
.sign-mandatory{background:#1f5fbf;color:#fff;border-radius:50%}
.sign-info{background:#1f5fbf;color:#fff;border-radius:4px}

/* ---------- Categories ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-align:center}
.cat-card .plate{
  display:inline-block;background:var(--asphalt);color:var(--road-yellow);
  font-weight:800;padding:6px 14px;border-radius:6px;margin-bottom:10px;letter-spacing:1px;
}

/* ---------- Trust ---------- */
.trust-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;align-items:start}
@media (max-width:760px){.trust-grid{grid-template-columns:1fr}}
.trust-facts{list-style:none;padding:0;margin:0}
.trust-facts li{padding:10px 0;border-bottom:1px solid var(--line);display:flex;gap:10px}
.trust-facts li:last-child{border-bottom:none}
.testimonial{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:12px;font-size:.9rem}
.testimonial .who{margin-top:8px;font-size:.8rem;color:var(--ink-soft);font-weight:600}

/* ---------- FAQ ---------- */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}
.faq-q{
  padding:16px 18px;font-weight:700;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;font-size:.95rem;
}
.faq-a{padding:0 18px 16px;color:var(--ink-soft);font-size:.9rem;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q .chevron{transform:rotate(180deg)}
.chevron{transition:transform .15s}

/* ---------- Footer ---------- */
footer{background:var(--asphalt);color:#cfd2d6;padding:40px 0 90px}
@media (min-width:900px){footer{padding-bottom:40px}}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;margin-bottom:26px}
@media (max-width:700px){.footer-grid{grid-template-columns:1fr}}
.footer-grid h5{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.5px;margin:0 0 12px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:8px;font-size:.86rem}
.footer-grid a{text-decoration:none;color:#cfd2d6}
.footer-grid a:hover{color:var(--road-yellow)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;font-size:.8rem;color:#9aa0a6;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Quiz screens ---------- */
.quiz-wrap{max-width:700px;margin:0 auto}
.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.timer{
  font-variant-numeric:tabular-nums;font-weight:800;font-size:1.1rem;
  background:var(--asphalt);color:var(--road-yellow);padding:8px 14px;border-radius:8px;
}
.timer.warn{background:var(--sign-red);color:#fff}
.progress-bar{height:8px;background:var(--paper-dim);border-radius:4px;overflow:hidden;margin-bottom:22px}
.progress-fill{height:100%;background:var(--road-yellow);transition:width .2s}
.question-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.q-count{font-size:.8rem;color:var(--ink-soft);font-weight:700;margin-bottom:8px}
.q-text{font-size:1.1rem;font-weight:700;margin-bottom:18px}
.opt{
  display:flex;align-items:center;gap:10px;
  border:1.5px solid var(--line);border-radius:8px;padding:13px 14px;margin-bottom:10px;
  cursor:pointer;font-size:.95rem;
}
.opt:hover{border-color:var(--road-yellow-dark)}
.opt.selected{border-color:var(--road-yellow-dark);background:#fff8e6}
.opt.correct{border-color:var(--sign-green);background:#eafaf0}
.opt.wrong{border-color:var(--sign-red);background:#fdecea}
.opt .letter{
  width:26px;height:26px;border-radius:6px;background:var(--paper-dim);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.82rem;flex-shrink:0;
}
.quiz-nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px}
.explain-box{background:var(--paper-dim);border-radius:8px;padding:12px 14px;font-size:.85rem;color:var(--ink-soft);margin-top:14px}

/* ---------- Results ---------- */
.result-hero{text-align:center;padding:20px 0 10px}
.score-ring{
  width:150px;height:150px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;flex-direction:column;
  margin:0 auto 18px;border:10px solid var(--paper-dim);
}
.score-ring.pass{border-color:var(--sign-green)}
.score-ring.fail{border-color:var(--sign-red)}
.score-ring .num{font-size:2rem;font-weight:800}
.score-ring .lbl{font-size:.75rem;color:var(--ink-soft)}
.pass-tag{display:inline-block;padding:6px 16px;border-radius:999px;font-weight:800;font-size:.85rem;margin-bottom:10px}
.pass-tag.pass{background:#eafaf0;color:var(--sign-green)}
.pass-tag.fail{background:#fdecea;color:var(--sign-red)}
.result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.review-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:10px}
.review-item .tag{font-size:.72rem;font-weight:800;padding:2px 8px;border-radius:6px;margin-right:8px}
.review-item .tag.correct{background:#eafaf0;color:var(--sign-green)}
.review-item .tag.wrong{background:#fdecea;color:var(--sign-red)}

/* ---------- Category screen (in-quiz test list) ---------- */
.crumb{font-size:.85rem;color:var(--ink-soft);margin-bottom:16px}
.crumb a{color:var(--road-yellow-dark);text-decoration:none;font-weight:600}

/* dark mode */
body.dark{--paper:#15181c;--paper-dim:#1b1f24;--ink:#eceef0;--ink-soft:#a3a9b0;--line:#2a2f36}
body.dark .question-card,body.dark .test-card,body.dark .feature,body.dark .info-box,
body.dark .resource-card,body.dark .cat-card,body.dark .faq-item,body.dark .testimonial,
body.dark .review-item{background:#1e2227}
body.dark .opt{background:#1e2227}