:root {
  --paper: #f6f4ef;
  --bg: #fbfaf7;
  --ink: #1c1b19;
  --text: #36342f;
  --muted: #75716a;
  --line: #dedad1;
  --alt: #efece5;
  --green: #1e5b43;
  --green-dark: #164634;
  --red: #a8432f;
  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 17px/1.65 var(--sans); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--ink); line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.01em; }
h2 { font-size: 1.75rem; }
p { margin: 0 0 1em; }
a { color: var(--ink); text-underline-offset: 3px; }
strong { color: var(--ink); font-weight: 600; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
.muted { color: var(--muted); }
.center { text-align: center; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } body { font-size: 16px; } h2 { font-size: 1.5rem; } }

/* Buttons and links */
.btn { display: inline-block; background: var(--ink); color: var(--bg); border: 1px solid var(--ink); border-radius: 4px; padding: 13px 22px; font: 500 1rem/1 var(--sans); text-decoration: none; cursor: pointer; transition: background .15s; }
.btn:hover { background: var(--green-dark); border-color: var(--green-dark); }
.btn:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-sm { padding: 8px 14px; font-size: .88rem; }
.btn-block { display: block; width: 100%; }
.link { color: var(--ink); text-decoration: underline; text-decoration-color: var(--line); text-decoration-thickness: 2px; }
.link:hover { text-decoration-color: var(--ink); }

/* Header */
.top { border-bottom: 1px solid var(--line); background: var(--bg); }
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.wordmark { font-family: var(--serif); font-weight: 600; font-size: 1.15rem; text-decoration: none; color: var(--ink); }
.top nav { display: flex; gap: 28px; font-size: .93rem; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover { color: var(--ink); }
.top nav .nav-cta { color: var(--ink); font-weight: 500; border-bottom: 1px solid var(--ink); }
.wordmark, .top nav a { white-space: nowrap; }
@media (max-width: 520px) { .top nav a:not(.btn) { display: none; } .wordmark { font-size: 1.05rem; } }

/* Hero */
.hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 64px; align-items: start; padding-top: 64px; padding-bottom: 80px; }
.eyebrow { font: 500 .78rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 22px; }
.hero h1 { font-size: clamp(2.1rem, 4.4vw, 3.15rem); font-weight: 400; margin-bottom: 24px; }
.lead { font-size: 1.12rem; color: var(--text); max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin: 32px 0 44px; }
.facts { display: flex; gap: 40px; margin: 0; padding-top: 22px; border-top: 1px solid var(--line); }
.facts dt { font-size: .8rem; color: var(--muted); }
.facts dd { margin: 2px 0 0; font: 500 1.15rem var(--mono); color: var(--ink); }
.figure { margin: 0; background: var(--paper); border: 1px solid var(--line); padding: 24px 24px 16px; }
.figure svg { display: block; width: 100%; height: auto; }
.figure figcaption { font-size: .82rem; color: var(--muted); margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.figure .wick { stroke: var(--ink); stroke-width: 1.2; }
.figure .up { fill: var(--green); }
.figure .down { fill: var(--red); }
.figure .vol { fill: #cfcabe; }
.figure .level { stroke: var(--muted); stroke-dasharray: 4 4; stroke-width: 1; }
.figure .pointer { fill: none; stroke: var(--ink); stroke-width: 1; }
.figure .note { font: 11px var(--mono); fill: var(--muted); }
@media (max-width: 860px) {
  /* On phones: headline, then the buy form straight away, then the details */
  .hero { display: flex; flex-direction: column; gap: 0; padding-top: 32px; padding-bottom: 56px; }
  .hero-text { display: contents; }
  .hero .eyebrow { order: 1; margin-bottom: 14px; }
  .hero h1 { order: 2; margin-bottom: 14px; }
  .hero .lead { order: 3; font-size: 1rem; margin-bottom: 24px; }
  .hero .buy-box { order: 4; }
  .hero .outcomes { order: 5; margin: 32px 0 28px; }
  .hero .facts { order: 6; }
}
@media (max-width: 600px) { .hero h1 { font-size: 1.85rem; } }
@media (max-width: 420px) { .facts { gap: 24px; } }

/* Sections */
.section { padding-top: 88px; padding-bottom: 88px; }
.band { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 80px 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.band h2 { font-size: 1.35rem; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; gap: 44px; } .section { padding-top: 64px; padding-bottom: 64px; } .band { padding: 60px 0; } }

.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding: 12px 0; border-top: 1px solid var(--line); }
.plain li:last-child { border-bottom: 1px solid var(--line); }

/* Syllabus */
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; flex-wrap: wrap; margin-bottom: 28px; }
.section-head h2 { margin: 0; }
.section-head p { margin: 0; font-size: .95rem; }
.syllabus { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.syllabus li { display: grid; grid-template-columns: 56px 1fr 110px; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.syllabus .idx { font: 500 .9rem/1.9 var(--mono); color: var(--muted); }
.syllabus h3 { font-size: 1.15rem; margin: 0 0 4px; }
.syllabus p { margin: 0; color: var(--muted); font-size: .97rem; }
.syllabus .meta { font: .82rem/1.6 var(--mono); color: var(--muted); text-align: right; padding-top: 3px; }
@media (max-width: 600px) {
  .syllabus li { grid-template-columns: 36px 1fr; }
  .syllabus .meta { grid-column: 2; text-align: left; padding-top: 0; }
  .syllabus .meta br { display: none; }
}

/* About */
.about { display: grid; grid-template-columns: 1fr 2fr; gap: 64px; border-top: 1px solid var(--line); }
.about .name { font-family: var(--serif); font-size: 1.3rem; color: var(--ink); margin-bottom: 8px; }
.about-body p:last-child { margin: 0; max-width: 36em; }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; gap: 8px; } }

/* Enroll */
.enroll h2 { font-size: 1.75rem; }
.included { width: 100%; border-collapse: collapse; margin-top: 24px; font-size: .95rem; }
.included th, .included td { text-align: left; padding: 12px 0; border-top: 1px solid var(--line); vertical-align: top; }
.included th { font-weight: 500; color: var(--muted); width: 38%; padding-right: 16px; }
.form { background: var(--bg); border: 1px solid var(--line); padding: 32px; align-self: start; }
.form label { display: block; font-size: .9rem; font-weight: 500; color: var(--ink); margin: 0 0 6px; }
.form input { display: block; width: 100%; padding: 12px 12px; margin-bottom: 18px; border: 1px solid #c9c4b9; border-radius: 4px; background: #fff; font: inherit; color: var(--ink); }
.form input:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }
.form small { display: block; font-size: .82rem; color: var(--muted); margin: -12px 0 18px; }
.form small.center { margin: 14px 0 0; }
@media (max-width: 600px) { .form { padding: 22px 18px; } }

.error { background: #f8ebe7; color: #8a3423; border-left: 3px solid var(--red); padding: 10px 12px; font-size: .9rem; margin: 0 0 16px; }
.warn { background: #f7f0de; color: #6f5317; border-left: 3px solid #b8902f; padding: 10px 12px; font-size: .9rem; text-align: left; }

/* FAQ */
#faq h2 { margin-bottom: 20px; }
details { border-top: 1px solid var(--line); }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 18px 32px 18px 0; position: relative; font-weight: 500; color: var(--ink); }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; position: absolute; right: 4px; top: 16px; font: 400 1.2rem var(--mono); color: var(--muted); }
details[open] summary::after { content: '\2013'; }
details p { color: var(--text); padding-bottom: 6px; max-width: 40em; }

/* Footer */
.foot { border-top: 1px solid var(--line); padding: 40px 0 48px; font-size: .84rem; color: var(--muted); }
.foot p { max-width: 52em; }
.foot strong { color: var(--text); }

/* Centered utility pages (thank you, download errors, admin login) */
.center-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; margin: 0; background: var(--paper); }
.card { background: var(--bg); border: 1px solid var(--line); padding: 32px; }
.thanks { max-width: 500px; width: 100%; }
.thanks h1 { font-size: 1.7rem; font-weight: 400; }
.thanks .btn { margin-top: 8px; }
.tick { font: 500 .78rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--green); margin-bottom: 18px; }

/* ---------- Conversion elements ---------- */
.notice { background: var(--ink); color: var(--bg); text-align: center; font-size: .88rem; padding: 9px 16px; }
.top nav { align-items: center; }
.top nav a.btn { color: var(--bg); border-bottom: 0; }

.outcomes { list-style: none; padding: 0; margin: 28px 0 36px; }
.outcomes li { position: relative; padding: 0 0 0 22px; margin: 10px 0; color: var(--ink); }
.outcomes li::before { content: ''; position: absolute; left: 0; top: .72em; width: 10px; height: 1.5px; background: var(--green); }

/* Buy box in the hero */
.buy-box { position: relative; border-color: var(--ink); box-shadow: 6px 6px 0 var(--paper), 6px 6px 0 1px var(--line); }
.price-row { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.price { font: 500 2.1rem/1.1 var(--mono); color: var(--ink); letter-spacing: -.02em; }
.was { color: var(--muted); font: 1rem var(--mono); }
.once { color: var(--muted); font-size: .85rem; }
.offer { font-size: .85rem; color: var(--green); font-weight: 500; margin: 0 0 4px; }
.buy-box .price-row + label, .buy-box .offer + label { margin-top: 20px; }
.btn-buy { padding: 16px 22px; font-size: 1.05rem; }
.assure { list-style: none; padding: 0; margin: 16px 0 0; font-size: .82rem; color: var(--muted); }
.assure li { padding: 6px 0; border-top: 1px solid var(--line); }
.assure li:first-child { border-top: 0; }

/* Problem -> method */
.method { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; border-top: 1px solid var(--line); }
.method h2 { font-size: 1.9rem; }
@media (max-width: 860px) { .method { grid-template-columns: 1fr; gap: 40px; } }

/* Reviews */
.reviews h2 { margin-bottom: 28px; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.review-grid blockquote { margin: 0; padding-top: 16px; border-top: 1px solid var(--ink); }
.review-grid p { font-family: var(--serif); font-size: 1.08rem; color: var(--ink); }
.review-grid cite { font-style: normal; font-size: .85rem; color: var(--muted); }
@media (max-width: 860px) { .review-grid { grid-template-columns: 1fr; gap: 24px; } }

/* Free preview */
.preview { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: center; }
.video { position: relative; aspect-ratio: 16 / 9; background: var(--ink); }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
@media (max-width: 860px) { .preview { grid-template-columns: 1fr; gap: 28px; } }

/* Inline calls to action */
.inline-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; margin-top: 32px; padding: 24px; background: var(--paper); border: 1px solid var(--line); }
.inline-cta p { margin: 0; }
.closing { align-self: center; }
.closing .price-row { margin: 8px 0 18px; }
.faq-cta { margin-top: 36px; }

/* Sticky buy bar (phones only) */
.buy-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); background: var(--bg); border-top: 1px solid var(--ink); font-size: .92rem; }
.buy-bar strong { font-family: var(--mono); font-weight: 500; font-size: 1.05rem; }
.buy-bar span { color: var(--muted); }
.buy-bar[hidden] { display: none; }
@media (min-width: 761px) { .buy-bar { display: none !important; } }
@media (max-width: 760px) { body { padding-bottom: 64px; } }

/* ---------- Trust elements ---------- */
.legal { font-size: .78rem; color: var(--muted); margin: 12px 0 0; }
.legal a { color: var(--muted); }

.steps-band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 44px 0 36px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.steps .idx { font: 500 .85rem var(--mono); color: var(--green); }
.steps h3 { font-size: 1.15rem; margin: 6px 0 6px; }
.steps p { margin: 0; color: var(--muted); font-size: .95rem; }
.steps-help { margin: 28px 0 0; font-size: .9rem; color: var(--muted); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; gap: 22px; } }

.about-body { display: flex; gap: 28px; align-items: flex-start; }
.portrait { width: 140px; height: 140px; object-fit: cover; filter: grayscale(.15); border: 1px solid var(--line); flex-shrink: 0; }
.creds { list-style: none; padding: 0; margin: 16px 0 0; font-size: .92rem; }
.creds li { padding: 7px 0; border-top: 1px solid var(--line); }
.socials { margin-top: 14px; font-size: .92rem; color: var(--muted); }
@media (max-width: 520px) { .about-body { flex-direction: column; } .portrait { width: 112px; height: 112px; } }

.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; margin-bottom: 28px; }
.foot-grid p { margin: 0 0 6px; }
.foot-name { color: var(--ink); font-weight: 500; margin-bottom: 10px !important; }
.foot a { color: var(--text); text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.foot .disclaimer { padding-top: 22px; border-top: 1px solid var(--line); }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr; gap: 22px; } }

/* Text pages: policies, contact */
.page { max-width: 760px; padding-top: 56px; padding-bottom: 80px; }
.page h1 { font-size: clamp(1.9rem, 4vw, 2.5rem); font-weight: 400; margin-bottom: 8px; }
.prose { margin-top: 32px; }
.prose h2 { font-size: 1.25rem; margin: 36px 0 10px; }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--alt); padding: 1px 5px; }

/* ---------- Contact / query form ---------- */
.contact-page { max-width: 1080px; }
.contact-page .lead { margin-bottom: 36px; }
.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: start; }
.contact-side h2 { font-size: 1.2rem; margin: 0 0 8px; }
.contact-side .included { margin: 0 0 32px; }
.contact-side .plain li { font-size: .95rem; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 560px) { .two-col { grid-template-columns: 1fr; } }
.form select, .form textarea { display: block; width: 100%; padding: 12px; margin-bottom: 18px; border: 1px solid #c9c4b9; border-radius: 4px; background: #fff; font: inherit; color: var(--ink); }
.form textarea { resize: vertical; min-height: 140px; line-height: 1.5; }
.form select:focus, .form textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }
.form [aria-invalid="true"] { border-color: var(--red); }
.form small.field-error { color: var(--red); margin: -12px 0 16px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.sent-box { border: 1px solid var(--line); background: var(--paper); padding: 32px; }
.sent-box h2 { font-size: 1.4rem; font-weight: 400; }
.faq-ask { margin-top: 14px; color: var(--muted); }

/* "How the course is taught" (shown until the instructor section is filled in) */
.teach { border-top: 1px solid var(--line); }
.teach-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; border-top: 1px solid var(--ink); padding-top: 24px; }
.teach-grid .idx { font: 500 .85rem var(--mono); color: var(--green); }
.teach-grid h3 { font-size: 1.1rem; margin: 8px 0 6px; }
.teach-grid p { margin: 0; color: var(--muted); font-size: .95rem; }
@media (max-width: 900px) { .teach-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .teach-grid { grid-template-columns: 1fr; gap: 22px; } }

/* ---------- Buyer pages: My course + order page ---------- */
.notice-ok { background: #e6efe9; color: var(--green-dark); border-left: 3px solid var(--green); padding: 12px 14px; margin: 0 0 22px; }
.lookup-page, .order-page { max-width: 1000px; }
.lookup-page .lead { margin-bottom: 32px; }
.lookup-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.lookup-grid h2, .download-box h2, .receipt h2 { font-size: 1.25rem; margin-bottom: 16px; }
.btn-ghost-dark { background: transparent; color: var(--ink); }
.btn-ghost-dark:hover { background: var(--alt); color: var(--ink); border-color: var(--ink); }
@media (max-width: 760px) { .lookup-grid { grid-template-columns: 1fr; } }
.order-page h1 { margin-bottom: 26px; }
.order-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .order-grid { grid-template-columns: 1fr; gap: 36px; } }
.download-box { border: 1px solid var(--ink); background: var(--bg); padding: 28px; box-shadow: 6px 6px 0 var(--paper), 6px 6px 0 1px var(--line); margin-bottom: 40px; }
.download-box .btn { margin-top: 6px; }
.small-note { font-size: .82rem; margin: 14px 0 0; }
.h-sub { font-size: 1.15rem; }
.receipt .included { margin-top: 0; }
.mono-sm { font-family: var(--mono); font-size: .82rem; word-break: break-all; }