@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&display=swap");

:root {
  --course-yellow: #ffdd00;
  --course-yellow-hover: #ffe533;
  --course-bg: #0b0b0c;
  --course-surface: #141416;
  --course-line: #303034;
  --course-text: #f5f5f2;
  --course-muted: #aaa9a5;
  --course-radius: 16px;
  --course-control-radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--course-bg); color: var(--course-text); font-family: "Nunito", system-ui, sans-serif; }
a { color: inherit; }
img { display: block; max-width: 100%; }
section[id] { scroll-margin-top: 84px; }
.course-landing { min-height: 100dvh; }
.course-shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 10px 14px; border-radius: 8px; background: var(--course-yellow); color: var(--course-bg); font-weight: 900; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.course-nav { position: sticky; z-index: 10; top: 0; background: rgba(11, 11, 12, .92); border-bottom: 1px solid var(--course-line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.course-nav-inner { min-height: 68px; display: flex; align-items: center; gap: 28px; }
.course-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--course-text); text-decoration: none; font-size: 15px; font-weight: 900; letter-spacing: .02em; white-space: nowrap; }
.course-brand strong { color: var(--course-yellow); }
.course-brand-mark { width: 32px; height: 32px; display: grid; flex: 0 0 auto; place-items: center; border-radius: 8px; background: var(--course-yellow); }
.course-brand-mark img { width: 23px; height: 23px; object-fit: contain; }
.course-nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.course-nav-links a, .course-nav-access { color: var(--course-muted); font-size: 14px; font-weight: 800; text-decoration: none; }
.course-nav-links a:hover, .course-nav-access:hover { color: var(--course-text); }
.course-nav-access { padding: 9px 14px; border: 1px solid var(--course-line); border-radius: var(--course-control-radius); color: var(--course-text); }

.course-hero { padding: 72px 0 80px; }
.course-hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr); gap: 72px; align-items: center; }
.course-eyebrow { margin: 0 0 14px; color: var(--course-yellow); font-size: 13px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.course-hero h1 { max-width: 13ch; margin: 0; font-size: clamp(42px, 5.6vw, 68px); line-height: 1.02; letter-spacing: -.035em; font-weight: 900; }
.course-hero-lead { max-width: 51ch; margin: 22px 0 0; color: var(--course-muted); font-size: clamp(17px, 2vw, 20px); line-height: 1.55; font-weight: 650; }
.course-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.course-button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 12px 20px; border-radius: var(--course-control-radius); font-size: 15px; font-weight: 900; text-align: center; text-decoration: none; white-space: nowrap; cursor: pointer; transition: background .15s ease, border-color .15s ease, transform .1s ease; }
.course-button:active, .course-nav-access:active { transform: scale(.98); }
.course-button-primary { border: 1px solid var(--course-yellow); background: var(--course-yellow); color: var(--course-bg); }
.course-button-primary:hover { border-color: var(--course-yellow-hover); background: var(--course-yellow-hover); }
.course-button-secondary { border: 1px solid var(--course-line); background: transparent; color: var(--course-text); }
.course-button-secondary:hover { border-color: #56565b; }
.course-button[aria-disabled="true"] { opacity: .62; }

.course-hero-outline { overflow: hidden; border: 1px solid var(--course-line); border-radius: var(--course-radius); background: var(--course-surface); box-shadow: 0 24px 70px rgba(0, 0, 0, .28); }
.course-outline-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 24px; background: var(--course-yellow); color: var(--course-bg); }
.course-outline-head span { font-size: 18px; font-weight: 900; }
.course-outline-head strong { font-size: 13px; white-space: nowrap; }
.course-hero-outline ul { margin: 0; padding: 8px 24px 0; list-style: none; }
.course-hero-outline li { display: grid; gap: 4px; padding: 18px 0; border-bottom: 1px solid var(--course-line); }
.course-hero-outline li strong { font-size: 16px; }
.course-hero-outline li span { color: var(--course-muted); font-size: 14px; line-height: 1.5; font-weight: 650; }
.course-hero-outline > p { margin: 0; padding: 18px 24px 22px; color: var(--course-muted); font-size: 13px; font-weight: 750; }

.course-section { padding: 88px 0; border-top: 1px solid var(--course-line); }
.course-section h2 { max-width: 18ch; margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.08; letter-spacing: -.025em; font-weight: 900; }
.course-section-lead, .course-outcomes-grid > div:first-child > p:last-child, .course-price-copy > p { max-width: 56ch; margin: 18px 0 0; color: var(--course-muted); font-size: 17px; line-height: 1.6; font-weight: 650; }
.course-outcomes, .course-price-section, .course-recovery { background: var(--course-surface); }
.course-outcomes-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: start; }
.course-outcome-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
.course-outcome-list article { display: grid; gap: 6px; padding: 22px 0; border-bottom: 1px solid var(--course-line); }
.course-outcome-list strong { font-size: 17px; }
.course-outcome-list span { color: var(--course-muted); font-size: 14px; line-height: 1.55; font-weight: 650; }

.course-syllabus-section h2 { max-width: 20ch; }
.course-syllabus { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 42px; align-items: start; }
.course-syllabus details, .course-faq-list details { border: 1px solid var(--course-line); border-radius: var(--course-radius); background: var(--course-surface); }
.course-syllabus summary, .course-faq-list summary { cursor: pointer; list-style: none; }
.course-syllabus summary::-webkit-details-marker, .course-faq-list summary::-webkit-details-marker { display: none; }
.course-syllabus summary { display: grid; grid-template-columns: 38px 1fr auto; gap: 12px; align-items: center; padding: 18px 20px; font-size: 15px; line-height: 1.35; font-weight: 850; }
.course-syllabus summary::after, .course-faq-list summary::after { content: "+"; color: var(--course-yellow); font-size: 22px; line-height: 1; }
.course-syllabus details[open] summary::after, .course-faq-list details[open] summary::after { content: "−"; }
.course-syllabus summary span { color: var(--course-yellow); font-variant-numeric: tabular-nums; }
.course-syllabus details p { margin: 0; padding: 0 20px 20px 70px; color: var(--course-muted); font-size: 14px; line-height: 1.55; font-weight: 650; }

.course-price-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, 430px); gap: 80px; align-items: start; }
.course-price-copy ul { display: grid; gap: 12px; margin: 28px 0 0; padding: 0; list-style: none; }
.course-price-copy li { display: flex; gap: 12px; font-size: 15px; font-weight: 750; }
.course-price-copy li::before { content: "✓"; color: var(--course-yellow); font-weight: 900; }
.course-price-card { padding: 30px; border: 1px solid var(--course-yellow); border-radius: var(--course-radius); background: var(--course-bg); box-shadow: 0 0 0 4px rgba(255, 221, 0, .08); }
.course-price-label { margin: 0; color: var(--course-yellow); font-size: 14px; font-weight: 900; }
.course-price { display: flex; align-items: baseline; gap: 14px; margin-top: 12px; }
.course-price strong { font-size: 52px; line-height: 1; letter-spacing: -.035em; }
.course-price span { color: var(--course-muted); font-size: 14px; font-weight: 750; }
.course-price-card > p:not(.course-price-label):not(.course-checkout-status) { margin: 18px 0 0; color: var(--course-muted); font-size: 14px; line-height: 1.55; font-weight: 650; }
.course-price-card .course-checkout { width: 100%; margin-top: 24px; }
.course-checkout-status { min-height: 22px; margin: 12px 0 0; color: var(--course-muted); font-size: 13px; line-height: 1.45; font-weight: 750; }
.course-checkout-status.ok { color: var(--course-yellow); }
.course-checkout-status.err { color: #ff8a8a; }
.course-price-card small { display: block; margin-top: 8px; color: #929197; font-size: 12px; line-height: 1.45; font-weight: 650; }

.course-faq-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; align-items: start; }
.course-faq-list { display: grid; gap: 12px; }
.course-faq-list summary { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; padding: 20px; font-size: 16px; font-weight: 850; }
.course-faq-list details p { margin: 0; padding: 0 20px 20px; color: var(--course-muted); font-size: 14px; line-height: 1.6; font-weight: 650; }

.course-recovery-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.course-recovery h2 { max-width: none; font-size: clamp(28px, 3vw, 38px); }
.course-recovery h2 + p { max-width: 54ch; margin: 12px 0 0; color: var(--course-muted); line-height: 1.55; font-weight: 650; }
.course-recovery form label { display: block; margin-bottom: 8px; color: var(--course-muted); font-size: 13px; font-weight: 850; }
.course-recovery form > div { display: flex; gap: 10px; }
.course-recovery input { min-width: 0; min-height: 46px; flex: 1; padding: 13px 14px; border: 1px solid var(--course-line); border-radius: var(--course-control-radius); background: var(--course-bg); color: var(--course-text); font: inherit; font-weight: 700; }
.course-recovery input::placeholder { color: #929197; }
.course-recovery button { min-height: 46px; padding: 12px 18px; border: 0; border-radius: var(--course-control-radius); background: var(--course-yellow); color: var(--course-bg); font: inherit; font-size: 14px; font-weight: 900; white-space: nowrap; cursor: pointer; }
.course-recovery button:disabled { opacity: .62; cursor: default; }
#course-recovery-status { min-height: 20px; margin: 9px 0 0; color: var(--course-muted); font-size: 13px; font-weight: 750; }
#course-recovery-status.ok { color: var(--course-yellow); }
#course-recovery-status.err { color: #ff8a8a; }

.course-footer { padding: 48px 0 36px; background: var(--course-bg); }
.course-footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.course-footer-inner > div { display: flex; flex-wrap: wrap; gap: 20px; }
.course-footer-inner > div a { color: var(--course-muted); font-size: 13px; font-weight: 750; text-decoration: none; }
.course-footer > .course-shell:last-child p { margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--course-line); color: #929197; font-size: 12px; line-height: 1.6; font-weight: 650; }
:focus-visible { outline: 3px solid var(--course-yellow); outline-offset: 3px; }

@media (max-width: 880px) {
  .course-hero-grid, .course-outcomes-grid, .course-price-grid, .course-faq-grid, .course-recovery-inner { grid-template-columns: 1fr; gap: 42px; }
  .course-hero-copy { max-width: 720px; }
  .course-hero h1 { max-width: 15ch; }
  .course-price-card { max-width: 520px; }
}

@media (max-width: 700px) {
  .course-shell { width: min(100% - 32px, 1120px); }
  .course-nav-links { display: none; }
  .course-nav-access { margin-left: auto; }
  .course-hero { padding: 52px 0 64px; }
  .course-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .course-hero h1 { font-size: clamp(38px, 12vw, 52px); }
  .course-actions { align-items: stretch; flex-direction: column; }
  .course-button { width: 100%; white-space: normal; }
  .course-section { padding: 68px 0; }
  .course-outcome-list, .course-syllabus { grid-template-columns: 1fr; }
  .course-syllabus details p { padding-left: 20px; }
  .course-price-card { padding: 24px; }
  .course-recovery form > div { flex-direction: column; }
}

@media (max-width: 420px) {
  .course-brand { font-size: 13px; }
  .course-brand-mark { width: 28px; height: 28px; }
  .course-brand-mark img { width: 20px; height: 20px; }
  .course-nav-access { padding: 8px 10px; font-size: 12px; }
  .course-outline-head, .course-price { align-items: flex-start; flex-direction: column; gap: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}