:root {
  --bg: #f6f8f7;
  --surface: #ffffff;
  --surface-2: #f0f4f3;
  --text: #13201d;
  --muted: #5a6b67;
  --border: #dfe7e5;
  --primary: #0f766e;
  --primary-ink: #ffffff;
  --primary-weak: #e3f3f0;
  --accent: #e8590c;
  --accent-ink: #ffffff;
  --good: #15803d;
  --good-weak: #e7f6ec;
  --bad: #c2410c;
  --bad-weak: #fdeee6;
  --reading: #7c3aed;
  --math: #2563eb;
  --science: #0f766e;
  --english: #b45309;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(16, 32, 29, .05), 0 6px 24px rgba(16, 32, 29, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1513;
    --surface: #151f1c;
    --surface-2: #1b2824;
    --text: #e7efed;
    --muted: #9db0ab;
    --border: #2a3a36;
    --primary: #2dd4bf;
    --primary-ink: #04201c;
    --primary-weak: #13312c;
    --accent: #fb923c;
    --accent-ink: #261005;
    --good: #4ade80;
    --good-weak: #12301d;
    --bad: #fb923c;
    --bad-weak: #33200f;
    --reading: #a78bfa;
    --math: #60a5fa;
    --science: #2dd4bf;
    --english: #fbbf24;
    --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1513;
  --surface: #151f1c;
  --surface-2: #1b2824;
  --text: #e7efed;
  --muted: #9db0ab;
  --border: #2a3a36;
  --primary: #2dd4bf;
  --primary-ink: #04201c;
  --primary-weak: #13312c;
  --accent: #fb923c;
  --accent-ink: #261005;
  --good: #4ade80;
  --good-weak: #12301d;
  --bad: #fb923c;
  --bad-weak: #33200f;
  --reading: #a78bfa;
  --math: #60a5fa;
  --science: #2dd4bf;
  --english: #fbbf24;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.6 "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--primary); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 6vw, 48px); font-weight: 800; margin: .2em 0 .4em; }
h2 { font-size: clamp(22px, 4vw, 28px); font-weight: 750; margin: 0 0 .6em; }
h3 { font-size: 18px; margin: 0 0 .25em; }
.muted { color: var(--muted); }
.tiny { font-size: 13px; }
.center { text-align: center; margin: 24px 0 40px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }

/* layout */
.topbar, .view, .footer { max-width: 760px; margin: 0 auto; padding-inline: 16px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding-block: 16px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--primary); color: var(--primary-ink); font-size: 17px; }
.topnav a { margin-left: 16px; color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.view { padding-bottom: 32px; }
.footer { border-top: 1px solid var(--border); padding-block: 24px 40px; color: var(--muted); font-size: 13px; }
body:not([data-view="landing"]) .topnav .nav-home { display: none; }
body[data-view="quiz"] .topnav, body:not([data-view="landing"]) .member-bar { display: none; }
.is-member .nav-member { color: var(--primary); background: var(--primary-weak); padding: 8px 12px; border-radius: 999px; }
.member-bar { max-width: 760px; margin: 0 auto 8px; padding: 10px 16px; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center;
  justify-content: space-between; background: var(--primary-weak); border-radius: 12px; font-weight: 600; }
.member-bar a { color: var(--primary); font-weight: 800; text-decoration: none; }
.is-member #upsell, .is-member #email-card, .is-member .next-sub, .is-member #sticky-cta { display: none !important; }
body[data-view="quiz"] .footer { display: none; }
.link-btn { background: none; border: 0; padding: 8px 0; font: inherit; font-weight: 700; color: var(--primary); text-decoration: underline; cursor: pointer; min-height: 44px; }
.notice { border-color: var(--accent); }
.notice p { margin: 0 0 12px; font-weight: 600; }
.notice-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.load-error { text-align: center; padding: 40px 16px; }

/* landing */
.hero { padding: 32px 0 24px; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-weight: 700; color: var(--primary); margin: 0; }
.lead { font-size: 19px; color: var(--muted); max-width: 620px; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; margin: 24px 0 20px; }
.hint { color: var(--muted); font-size: 15px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.pill { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 14px; font-weight: 700; background: var(--surface-2); color: var(--text); }
.pill-reading { color: var(--reading); } .pill-math { color: var(--math); }
.pill-science { color: var(--science); } .pill-english { color: var(--english); }
.band { padding: 28px 0; border-top: 1px solid var(--border); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.steps li { display: flex; gap: 14px; }
.step-num { flex: none; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--primary-weak); color: var(--primary); font-weight: 800; }
.steps p { margin: 0; color: var(--muted); }
details { border: 1px solid var(--border); background: var(--surface); border-radius: 12px; padding: 12px 16px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 650; }
details p { color: var(--muted); margin: 8px 0 0; }
.final-cta { text-align: center; }

/* buttons */
.btn { appearance: none; border: 1px solid transparent; border-radius: 12px; padding: 12px 18px; font: inherit; font-weight: 700; cursor: pointer; min-height: 48px; transition: transform .05s, background .15s; }
.btn:active { transform: translateY(1px); }
.btn:focus-visible, .opt:focus-visible, .chip:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 45%, transparent); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: var(--primary-ink); }
.btn-primary:hover { filter: brightness(1.06); }
.btn:disabled { opacity: .45; cursor: default; }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-lg { font-size: 18px; padding: 14px 24px; }
.btn-block { width: 100%; }

/* cards & forms */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin: 16px 0; }
.narrow { max-width: 520px; margin: 32px auto; }
.field { display: block; margin: 20px 0; font-weight: 650; }
.field > span { display: block; margin-bottom: 8px; }
.range-row { display: flex; align-items: center; gap: 12px; }
.range-row input { flex: 1; accent-color: var(--primary); }
.range-row output { min-width: 48px; font-weight: 800; color: var(--primary); }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--muted); margin-top: 8px; }
select, input[type="email"], input[type="text"], textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; min-height: 48px;
}

/* quiz */
.quiz-head { position: sticky; top: 0; z-index: 2; background: var(--bg); padding: 10px 0 6px; }
.quiz-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
#q-progress { height: 100%; width: 0; background: var(--primary); transition: width .25s; }
.q-card { padding: 22px; }
.q-type { font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); margin: 0 0 8px; }
.q-stem p { margin: 0 0 12px; }
.q-stem .passage { background: var(--surface-2); border-radius: 12px; padding: 14px 16px; margin-bottom: 14px; }
.q-stem .passage p { margin: 0 0 10px; }
.q-answer { display: grid; gap: 10px; margin-top: 8px; }
.opt { display: flex; gap: 12px; align-items: flex-start; text-align: left; width: 100%; padding: 14px; border-radius: 12px; border: 1.5px solid var(--border); background: var(--surface); color: var(--text); font: inherit; cursor: pointer; min-height: 52px; }
.opt:hover { border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); }
.opt .tag { flex: none; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--surface-2); font-weight: 800; font-size: 14px; }
.opt.is-on { border-color: var(--primary); background: var(--primary-weak); }
.opt.is-on .tag { background: var(--primary); color: var(--primary-ink); }
.opt.multi .tag { border-radius: 6px; }
.order-wrap { display: grid; gap: 14px; }
.order-label { font-size: 14px; font-weight: 700; color: var(--muted); margin: 0 0 6px; }
.order-list { display: grid; gap: 8px; min-height: 52px; padding: 8px; border: 1.5px dashed var(--border); border-radius: 12px; }
.order-list .opt { border-style: solid; }
.order-list .tag { background: var(--primary); color: var(--primary-ink); }
.order-empty { color: var(--muted); font-size: 15px; padding: 8px; }
.numeric-row { display: flex; align-items: center; gap: 10px; max-width: 320px; }
.numeric-row input { font-size: 20px; font-weight: 700; }
.quiz-nav {
  position: sticky; bottom: 0; z-index: 3;
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px;
  margin: 12px -16px 0; padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
}
.quiz-nav #next { justify-self: end; min-width: 132px; }
.quiz-nav #prev { justify-self: start; min-width: 88px; }
#flag[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); }
.grid-toggle-row { margin-top: 4px; }
.q-dots { display: grid; grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); gap: 8px; margin-top: 10px; }
.q-dot { height: 44px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); font: 700 14px/1 inherit; cursor: pointer; }
.q-dot.done { background: var(--primary-weak); color: var(--primary); border-color: transparent; }
.q-dot.current { outline: 2px solid var(--primary); }
.q-dot.flagged { box-shadow: inset 0 -3px 0 var(--accent); }

/* results */
.score-row { display: flex; align-items: center; gap: 20px; margin: 10px 0 18px; }
.score-ring { --p: 0; flex: none; width: 120px; height: 120px; border-radius: 50%; display: grid; place-items: center;
  background: radial-gradient(closest-side, var(--surface) 78%, transparent 79% 100%), conic-gradient(var(--primary) calc(var(--p) * 1%), var(--surface-2) 0); }
.score-ring span { font-size: 30px; font-weight: 800; }
.score-summary { font-size: 19px; font-weight: 700; margin: 0 0 4px; }
.section-bars { display: grid; gap: 12px; }
.bar-row { display: grid; grid-template-columns: 92px 1fr 52px; align-items: center; gap: 10px; font-weight: 650; font-size: 15px; }
.bar { height: 12px; border-radius: 999px; background: var(--surface-2); overflow: hidden; position: relative; }
.bar > i { position: absolute; inset: 0 auto 0 0; border-radius: 999px; }
.bar .target-mark { position: absolute; top: -3px; bottom: -3px; width: 2px; background: var(--text); opacity: .5; }
.focus-list { margin: 0; padding-left: 22px; }
.focus-list li { margin-bottom: 8px; }
.focus-list .muted { font-size: 15px; }
.email-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.success { color: var(--good); font-weight: 700; }
.upsell { border: 2px solid var(--primary); }
.ticks { list-style: none; padding: 0; margin: 0 0 16px; display: grid; gap: 8px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 800; }
.price-row { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.price { font-size: 32px; font-weight: 800; }
.review-filter { display: flex; gap: 8px; margin-bottom: 12px; }
.chip { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: 6px 14px; font: 600 14px/1.4 inherit; cursor: pointer; min-height: 36px; }
.chip.is-on { background: var(--text); color: var(--bg); border-color: var(--text); }
.review-item { border-top: 1px solid var(--border); padding: 14px 0; }
.review-item summary { list-style: none; display: flex; gap: 10px; align-items: flex-start; }
.review-item summary::-webkit-details-marker { display: none; }
.review-item details { border: 0; padding: 0; margin: 0; background: transparent; }
.mark { flex: none; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; font-weight: 800; font-size: 14px; }
.mark.ok { background: var(--good-weak); color: var(--good); }
.mark.no { background: var(--bad-weak); color: var(--bad); }
.review-body { padding: 10px 0 0 36px; }
.answer-line { margin: 4px 0; font-size: 15px; }
.opt-notes { margin: 8px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.report-link { background: none; border: 0; color: var(--muted); font: 600 14px/1 inherit; text-decoration: underline; cursor: pointer; padding: 8px 0; }
.report-box { display: grid; gap: 8px; margin-top: 6px; }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .card { padding: 16px; }
  .q-card { padding: 18px 16px; }
  .btn-lg { width: 100%; }
  .hero-cta { flex-direction: column; align-items: stretch; text-align: center; }
  .email-form { grid-template-columns: 1fr; }
  .score-row { flex-direction: row; align-items: center; gap: 14px; }
  .score-ring { width: 86px; height: 86px; }
  .score-ring span { font-size: 22px; }
  .score-summary { font-size: 17px; }
  #score-target { font-size: 14px; margin: 0; }
  .bar-row { grid-template-columns: 80px 1fr 46px; }
  .topnav .nav-home { display: none; }
  .member-bar { margin-inline: 16px; }
}

/* ===== answer reveal (tutor mode) ===== */
.opt:disabled { cursor: default; opacity: 1; }
.opt.is-key { border-color: var(--good); background: var(--good-weak); }
.opt.is-key .tag { background: var(--good); color: var(--bg); }
.opt.is-wrong { border-color: var(--bad); background: var(--bad-weak); }
.opt.is-wrong .tag { background: var(--bad); color: var(--bg); }
input.is-key { border-color: var(--good); background: var(--good-weak); }
input.is-wrong { border-color: var(--bad); background: var(--bad-weak); }
.explain { margin-top: 16px; padding: 14px 16px; border-radius: 12px; background: var(--surface-2); }
.explain.ok { box-shadow: inset 4px 0 0 var(--good); }
.explain.no { box-shadow: inset 4px 0 0 var(--bad); }
.explain-verdict { font-weight: 800; margin: 0 0 6px; }
.explain.ok .explain-verdict { color: var(--good); }
.explain.no .explain-verdict { color: var(--bad); }

input[type="checkbox"], input[type="radio"] { accent-color: var(--primary); }

/* ===== conversion additions ===== */
.h-sm { font-size: 20px; font-weight: 750; margin: 2px 0 6px; }
.try-card { margin: 8px 0 24px; border: 2px solid var(--primary-weak); }
.try-next { margin-top: 14px; }
.price-old { font-size: 20px; color: var(--muted); text-decoration: line-through; }
.assure { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 4px; color: var(--muted); font-size: 14px; }
.pricing-card { margin: 0; }
.plan-list { margin: 0; padding-left: 22px; display: grid; gap: 10px; }
.plan-list li strong { display: block; }
.plan-list li span { color: var(--muted); font-size: 15px; }
.offer-personal { font-weight: 650; margin: -4px 0 12px; }
.more-box { margin-top: 16px; }
.field-set { border: 0; padding: 0; margin: 0 0 18px; }
.field-set legend { font-weight: 700; margin-bottom: 8px; }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 6px; background: var(--surface-2); padding: 4px; border-radius: 12px; }
.seg button { border: 0; background: transparent; color: var(--text); font: 650 15px/1.2 inherit; padding: 10px 8px; border-radius: 9px; cursor: pointer; min-height: 44px; }
.seg button small { display: block; font-weight: 500; font-size: 12px; color: var(--muted); }
.seg button.is-on { background: var(--surface); box-shadow: var(--shadow); color: var(--primary); }
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--surface) 95%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border); font-size: 15px;
}
.sticky-cta .btn { min-width: 110px; }
body:not([data-view="results"]) .sticky-cta { display: none; }
@media (min-width: 900px) { .sticky-cta { left: 50%; right: auto; transform: translateX(-50%); width: 760px; border: 1px solid var(--border); border-radius: 14px 14px 0 0; } }

/* ===== free vs full, next step ===== */
.tag-opt { display: inline-block; font-size: 12px; font-weight: 700; color: var(--muted); background: var(--surface-2); border-radius: 999px; padding: 2px 8px; vertical-align: middle; }
.compare { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.cmp-row { display: grid; grid-template-columns: 1fr 130px 150px; align-items: center; gap: 8px; padding: 12px 14px; border-top: 1px solid var(--border); font-size: 15px; }
.cmp-row:first-child { border-top: 0; }
.cmp-head { font-weight: 800; font-size: 14px; }
.cmp-col { text-align: center; }
.cmp-pro { background: color-mix(in srgb, var(--primary) 7%, transparent); border-radius: 8px; padding: 6px 4px; }
.cmp-head .cmp-pro { color: var(--primary); }
.cmp-col.yes { color: var(--good); font-weight: 800; }
.cmp-col.no { color: var(--muted); }
.cmp-actions .btn { min-height: 44px; padding: 10px 8px; font-size: 15px; }
.center-assure { display: flex; flex-wrap: wrap; gap: 6px 16px; justify-content: center; }
.next-step { margin-top: 18px; padding: 16px; border-radius: 14px; background: color-mix(in srgb, var(--accent) 8%, var(--surface)); border: 1.5px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.next-title { margin: 0 0 4px; font-weight: 800; font-size: 18px; }
.next-desc { margin: 0 0 12px; }
.next-sub { text-align: center; margin: 8px 0 0; }
@media (max-width: 520px) {
  .cmp-row { grid-template-columns: 1fr 64px 92px; padding: 10px 10px; font-size: 14px; }
  .cmp-actions .btn { font-size: 14px; }
}

/* ===== test checkout modal (local only) ===== */
.modal-back { position: fixed; inset: 0; z-index: 20; background: rgba(10, 20, 18, .55); display: grid; place-items: center; padding: 16px; }
.modal { width: 100%; max-width: 440px; margin: 0; }
.co-line { display: flex; justify-content: space-between; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin: 8px 0 4px; }

.cmp-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.cmp-cta .btn { width: 100%; padding-inline: 8px; }
@media (max-width: 380px) { .cmp-cta { grid-template-columns: 1fr; } }