/* TradeQBank — shared styles. Plain CSS, no frameworks, no external resources. */
:root{
  --ink:#1c2733;
  --muted:#5a6a78;
  --brand:#0f4c75;
  --brand-dark:#0a3654;
  --accent:#1b7a43;
  --accent-dark:#146334;
  --line:#d8e0e7;
  --bg:#f6f8fa;
  --card:#ffffff;
  --warn:#8a5a00;
  --bad:#a3271e;
  --good:#146334;
  --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  font-size:17px;
}
a{color:var(--brand)}
a:hover{color:var(--brand-dark)}
.container{max-width:1020px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--brand-dark);color:#fff}
.site-header .container{display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;padding-top:14px;padding-bottom:14px}
.logo{color:#fff;text-decoration:none;font-weight:700;font-size:1.35rem;letter-spacing:.2px}
.logo:hover{color:#fff}
.logo span{color:#8fd0a8}
.site-nav{display:flex;flex-wrap:wrap;gap:6px 20px;margin-left:auto}
.site-nav a{color:#dbe7f0;text-decoration:none;font-size:.98rem;padding:4px 2px}
.site-nav a:hover{color:#fff;text-decoration:underline}
.site-nav a[aria-current="page"]{color:#fff;font-weight:600;border-bottom:2px solid #8fd0a8}

/* Hero / sections */
.hero{background:linear-gradient(180deg,#eef4f8,#f6f8fa);border-bottom:1px solid var(--line);padding:44px 0 36px}
.hero h1{font-size:2.1rem;line-height:1.2;margin:0 0 14px}
.hero p.lede{font-size:1.13rem;color:var(--muted);max-width:46em;margin:0 0 22px}
main section{padding:34px 0 8px}
h1{font-size:1.9rem;line-height:1.25}
h2{font-size:1.45rem;margin:0 0 14px}
h3{font-size:1.12rem;margin:0 0 8px}
p{margin:0 0 14px}
.small{font-size:.9rem;color:var(--muted)}
.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;font-weight:700;color:var(--brand);margin-bottom:6px}

/* Buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;
  padding:12px 22px;border-radius:8px;border:1px solid var(--accent-dark);cursor:pointer;font-size:1rem}
.btn:hover{background:var(--accent-dark);color:#fff}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.secondary:hover{background:#eef4f8;color:var(--brand-dark)}
.btn.disabled{background:#e7edf2;color:var(--muted);border:1px solid var(--line);cursor:default;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}

/* Cards & grids */
.grid{display:grid;gap:18px;margin:18px 0 10px}
@media(min-width:720px){.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h3{margin-top:0}
.badge{display:inline-block;font-size:.78rem;font-weight:700;padding:2px 10px;border-radius:999px;vertical-align:middle}
.badge.avail{background:#e2f2e7;color:var(--good)}
.badge.soon{background:#fdf0d5;color:var(--warn)}
.price{font-size:1.9rem;font-weight:700;margin:6px 0 2px}
.price small{font-size:.95rem;font-weight:400;color:var(--muted)}
ul.checks{list-style:none;padding:0;margin:10px 0}
ul.checks li{padding-left:26px;position:relative;margin-bottom:8px}
ul.checks li::before{content:"✓";position:absolute;left:2px;color:var(--accent);font-weight:700}
ul.plain{margin:10px 0;padding-left:22px}
ul.plain li{margin-bottom:7px}

/* FAQ */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin-bottom:10px}
.faq summary{font-weight:600;cursor:pointer}
.faq details p{margin:10px 0 4px;color:#33424f}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:44px;padding:26px 0 34px;background:#eef2f5}
.site-footer p{font-size:.88rem;color:var(--muted);margin-bottom:8px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:6px 18px;margin-bottom:12px}
.site-footer nav a{font-size:.9rem}

/* Quiz player */
.quiz-shell{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:20px 0}
.quiz-shell:empty{display:none}
.quiz-top{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;justify-content:space-between;margin-bottom:10px}
.quiz-meta{font-size:.92rem;color:var(--muted)}
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:1.05rem}
.timer.low{color:var(--bad)}
.progress{height:10px;background:#e7edf2;border-radius:999px;overflow:hidden;margin:8px 0 20px}
.progress > div{height:100%;background:var(--brand);width:0%;transition:width .25s ease}
.q-area{font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--brand)}
.q-stem{font-size:1.15rem;font-weight:600;margin:6px 0 16px;line-height:1.45}
.options{display:grid;gap:10px;margin-bottom:8px}
.option{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;background:#fff;border:1px solid var(--line);
  border-radius:8px;padding:13px 15px;font-size:1rem;cursor:pointer;color:var(--ink);line-height:1.45}
.option:hover{border-color:var(--brand)}
.option .letter{font-weight:700;color:var(--brand);flex:0 0 auto}
.option.selected{border-color:var(--brand);background:#eef4f8;box-shadow:inset 0 0 0 1px var(--brand)}
.option.correct{border-color:var(--good);background:#e9f6ee;box-shadow:inset 0 0 0 1px var(--good)}
.option.wrong{border-color:var(--bad);background:#fbeeec;box-shadow:inset 0 0 0 1px var(--bad)}
.option:disabled{cursor:default;opacity:1}
.feedback{border-radius:8px;padding:14px 16px;margin:14px 0;font-size:.98rem}
.feedback.good{background:#e9f6ee;border:1px solid #bfe3cd}
.feedback.bad{background:#fbeeec;border:1px solid #f0c8c3}
.feedback .verdict{font-weight:700;margin-bottom:4px}
.feedback .src{font-size:.88rem;color:var(--muted);margin-top:8px}
.quiz-nav{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;margin-top:16px}
.report-link{font-size:.85rem;color:var(--muted)}
.results-score{font-size:2.2rem;font-weight:700}
.pass{color:var(--good)} .fail{color:var(--bad)}
table.breakdown{width:100%;border-collapse:collapse;margin:14px 0;font-size:.97rem}
table.breakdown th,table.breakdown td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left}
table.breakdown td.num,table.breakdown th.num{text-align:right;font-variant-numeric:tabular-nums}
.review-item{border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin-bottom:10px;background:#fff}
.review-item .q-stem{font-size:1rem}
.mode-picker{display:grid;gap:14px}
@media(min-width:720px){.mode-picker{grid-template-columns:1fr 1fr}}
select,input[type="number"]{font-size:1rem;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
label.field{display:block;font-weight:600;margin:12px 0 6px}
.notice{background:#fdf6e0;border:1px solid #ecd9a0;border-radius:8px;padding:12px 16px;font-size:.95rem;margin:16px 0}
.error-box{background:#fbeeec;border:1px solid #f0c8c3;border-radius:8px;padding:14px 16px;margin:16px 0}
.error-text{color:#a33b32;font-weight:600}
.code-input{font-size:1.05rem;letter-spacing:.06em;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);width:min(340px,100%);text-transform:uppercase}