:root {
  --bg: #f7f8f5;
  --surface: #fff;
  --ink: #10243e;
  --muted: #536374;
  --primary: #173f70;
  --primary-hover: #102f56;
  --teal: #07645f;
  --teal-soft: #e9f6f3;
  --line: #e2e7e5;
  --gold: #f4d58a;
  --shadow: 0 24px 64px rgba(16, 36, 62, .12);
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 17px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 12px; top: 12px; z-index: 100; padding: 10px 14px; background: #fff; border-radius: 10px; }
.topbar { height: 58px; display: flex; align-items: center; border-bottom: 1px solid rgba(16, 36, 62, .08); background: rgba(247, 248, 245, .94); backdrop-filter: blur(12px); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font-size: 20px; font-weight: 850; letter-spacing: -.035em; }
.brand-mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; color: #fff; background: linear-gradient(145deg, var(--primary), var(--teal)); font-size: 14px; font-weight: 900; }
.telegram-note { min-height: 44px; display: inline-flex; align-items: center; gap: 7px; color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 750; }
.telegram-note svg { width: 18px; height: 18px; color: #2a9bd7; }
.sales-hero { padding: 46px 0 38px; }
.hero-layout { min-height: 590px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(360px, .78fr); grid-template-rows: auto 1fr; column-gap: 72px; align-items: center; }
.hero-copy { grid-column: 1; align-self: end; }
.hero-buy { grid-column: 1; align-self: start; padding-top: 22px; }
.lesson-preview { grid-column: 2; grid-row: 1 / 3; align-self: center; }
.badge { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 15px; padding: 7px 10px; border-radius: 999px; color: var(--teal); background: var(--teal-soft); font-size: 12px; line-height: 1; font-weight: 850; letter-spacing: .055em; text-transform: uppercase; }
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
h1 { max-width: 700px; margin: 0; font-size: clamp(45px, 5.4vw, 68px); line-height: 1.01; letter-spacing: -.052em; font-weight: 820; }
.lead { max-width: 620px; margin: 18px 0 0; color: var(--muted); font-size: 19px; line-height: 1.52; }
.context-line { margin: 17px 0 0; color: var(--ink); font-size: 14px; font-weight: 760; }
.hero-price { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 13px; }
.hero-price strong { font-size: 27px; letter-spacing: -.035em; }
.hero-price span { min-height: 22px; color: var(--teal); font-size: 15px; font-weight: 750; }
.cta { min-height: 56px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 24px; border: 0; border-radius: 16px; color: #fff; background: var(--primary); box-shadow: 0 12px 28px rgba(23, 63, 112, .18); text-decoration: none; font-size: 17px; line-height: 1.2; font-weight: 820; transition: background .16s, transform .16s; }
.cta:hover { background: var(--primary-hover); transform: translateY(-1px); }
.cta:focus-visible { outline: 3px solid rgba(11, 133, 125, .35); outline-offset: 3px; }
.hero-buy .cta { width: min(100%, 430px); }
.payment-note { max-width: 500px; margin: 10px 0 0; color: #657485; font-size: 13px; line-height: 1.4; }
.facts { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 16px 0 0; color: var(--muted); font-size: 13px; }
.facts b { color: var(--ink); }
.facts i { width: 3px; height: 3px; border-radius: 50%; background: #a7b0b8; }
.lesson-preview { position: relative; padding: 18px; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.lesson-preview::before { content: ""; position: absolute; inset: 11px 11px auto auto; width: 66px; height: 66px; border-radius: 50%; background: var(--teal-soft); }
.message-head { position: relative; display: flex; align-items: center; gap: 11px; margin-bottom: 18px; }
.avatar { width: 42px; height: 42px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; color: white; background: linear-gradient(145deg, var(--primary), var(--teal)); font-size: 15px; font-weight: 900; }
.message-head strong { display: block; font-size: 15px; }
.message-head span { display: block; color: #6f7d8b; font-size: 12px; }
.counter { margin-left: auto; align-self: flex-start; padding: 5px 8px; border-radius: 999px; color: var(--teal); background: var(--teal-soft); font-size: 11px; font-weight: 850; }
.lesson-label { color: var(--teal); font-size: 11px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.phrase { margin: 7px 0 2px; font-size: 25px; line-height: 1.2; letter-spacing: -.025em; font-weight: 820; }
.transcription { color: var(--teal); font-size: 14px; }
.translation { margin: 7px 0 0; color: var(--muted); font-size: 15px; }
.audio-format { display: flex; align-items: center; gap: 10px; margin: 17px 0; padding: 11px 13px; border-radius: 13px; color: var(--primary); background: #f1f5f8; font-size: 13px; font-weight: 790; }
.audio-icon { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--teal); font-size: 11px; }
.example { padding-top: 15px; border-top: 1px solid var(--line); }
.example small { display: block; margin-bottom: 5px; color: #707d8b; font-size: 11px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.example p { margin: 0; font-size: 15px; }
.example span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }
.section { padding: 78px 0; scroll-margin-top: 20px; }
.section-white { background: var(--surface); }
.section-dark { color: #fff; background: var(--ink); }
.section-head { max-width: 720px; margin-bottom: 32px; }
.section-kicker { margin: 0 0 10px; color: var(--teal); font-size: 12px; font-weight: 900; letter-spacing: .07em; text-transform: uppercase; }
h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.08; letter-spacing: -.043em; }
.section-head > p:last-child { margin: 14px 0 0; color: var(--muted); font-size: 18px; }
.section-dark .section-head > p:last-child { color: rgba(255,255,255,.72); }
.proof-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
.daily-card { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--bg); }
.daily-card.main { background: var(--ink); color: #fff; border-color: var(--ink); }
.daily-card h3 { margin: 0; font-size: 21px; letter-spacing: -.025em; }
.daily-card p { margin: 8px 0 0; color: var(--muted); }
.daily-card.main p { color: rgba(255,255,255,.72); }
.format-list { display: grid; gap: 12px; margin: 22px 0 0; padding: 0; list-style: none; }
.format-list li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; align-items: center; }
.format-list b { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; color: var(--teal); background: var(--teal-soft); font-size: 13px; }
.daily-card.main .format-list b { color: var(--ink); background: var(--gold); }
.sample-stack { display: grid; gap: 12px; }
.sample-row { padding: 17px 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.sample-row small { color: var(--teal); font-weight: 850; }
.sample-row strong { display: block; margin-top: 4px; font-size: 17px; }
.sample-row span { color: var(--muted); font-size: 14px; }
.situation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.situation { padding: 23px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.situation-number { color: var(--teal); font-size: 12px; font-weight: 900; }
.situation h3 { margin: 18px 0 7px; font-size: 21px; letter-spacing: -.025em; }
.situation p { margin: 0; color: var(--muted); font-size: 15px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); }
.step { padding: 0 34px; border-left: 1px solid rgba(255,255,255,.15); }
.step:first-child { padding-left: 0; border-left: 0; }
.step:last-child { padding-right: 0; }
.step span { display: block; margin-bottom: 18px; color: #81d7cf; font-size: 13px; font-weight: 900; }
.step h3 { margin: 0 0 7px; font-size: 21px; }
.step p { margin: 0; color: rgba(255,255,255,.7); font-size: 15px; }
.pricing-box { padding: 32px; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.price-table { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.price-plan { position: relative; padding: 22px; border-left: 1px solid var(--line); }
.price-plan:first-child { border-left: 0; }
.price-plan.best { background: var(--teal-soft); }
.best-label { display: inline-block; margin-bottom: 8px; padding: 4px 8px; border-radius: 999px; color: #614300; background: var(--gold); font-size: 10px; font-weight: 900; letter-spacing: .04em; text-transform: uppercase; }
.price-plan > span { display: block; color: var(--muted); font-size: 13px; }
.price-plan strong { display: block; margin: 5px 0 3px; font-size: 23px; letter-spacing: -.03em; }
.price-plan small { color: var(--muted); font-size: 12px; }
.price-plan .local-price { display: block; min-height: 18px; margin-top: 5px; color: var(--teal); font-size: 12px; font-weight: 760; }
.pricing-foot { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-top: 22px; }
.rate-note { max-width: 540px; margin: 0; color: var(--muted); font-size: 12px; }
.honest-box { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; padding: 34px; border-radius: 22px; background: var(--teal-soft); }
.honest-box h2 { font-size: clamp(29px, 3.2vw, 40px); }
.honest-box p { margin: 0; color: var(--muted); }
.honest-box p + p { margin-top: 12px; }
.faq { display: grid; gap: 10px; max-width: 850px; }
.faq details { padding: 18px 20px; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 800; }
.faq p { margin: 10px 0 0; color: var(--muted); font-size: 15px; }
.final-cta { padding: 38px; display: flex; justify-content: space-between; align-items: center; gap: 30px; border-radius: 22px; color: #fff; background: var(--primary); }
.final-cta h2 { max-width: 620px; font-size: clamp(30px, 4vw, 45px); }
.final-cta p { margin: 9px 0 0; color: rgba(255,255,255,.75); }
.final-cta .cta { flex: 0 0 auto; color: var(--primary); background: #fff; box-shadow: none; }
.footer { padding: 34px 0 110px; border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 18px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { min-height: 44px; display: inline-flex; align-items: center; color: var(--muted); text-decoration: none; font-size: 13px; }
.footer small { color: #6f7d8b; }
.sticky-buy { position: fixed; z-index: 50; left: 12px; right: 12px; bottom: calc(10px + env(safe-area-inset-bottom)); display: none; align-items: center; gap: 12px; padding: 9px 9px 9px 14px; border: 1px solid rgba(16,36,62,.10); border-radius: 18px; background: rgba(255,255,255,.96); box-shadow: 0 16px 42px rgba(16,36,62,.22); backdrop-filter: blur(14px); transform: translateY(140%); opacity: 0; transition: transform .2s, opacity .2s; }
.sticky-buy.is-visible { transform: translateY(0); opacity: 1; }
.sticky-price { min-width: 76px; }
.sticky-price strong { display: block; font-size: 16px; }
.sticky-price span { display: block; color: var(--muted); font-size: 10px; }
.sticky-buy .cta { min-height: 48px; flex: 1; padding-inline: 14px; font-size: 15px; }
.catalog-hero { padding: 64px 0 38px; text-align: center; }
.catalog-hero .badge { margin-inline: auto; }
.catalog-hero h1 { max-width: 840px; margin-inline: auto; }
.catalog-hero .lead { max-width: 680px; margin-inline: auto; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding-bottom: 78px; }
.catalog-card { display: flex; flex-direction: column; min-height: 420px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: 0 12px 36px rgba(16,36,62,.06); }
.catalog-tag { align-self: flex-start; padding: 5px 8px; border-radius: 999px; color: var(--teal); background: var(--teal-soft); font-size: 11px; font-weight: 900; text-transform: uppercase; }
.catalog-card h2 { margin-top: 20px; font-size: 30px; }
.catalog-card > p { margin: 10px 0 0; color: var(--muted); font-size: 15px; }
.catalog-sample { margin: 22px 0; padding: 15px; border-radius: 14px; background: var(--bg); }
.catalog-sample small { color: var(--teal); font-weight: 800; }
.catalog-sample strong { display: block; margin-top: 4px; font-size: 17px; }
.catalog-sample span { color: var(--muted); font-size: 13px; }
.catalog-bottom { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--line); }
.catalog-price { min-height: 50px; margin-bottom: 12px; }
.catalog-price strong { display: block; font-size: 20px; }
.catalog-price span { display: block; min-height: 18px; color: var(--teal); font-size: 12px; font-weight: 760; }
.catalog-link { min-height: 52px; display: flex; align-items: center; justify-content: center; padding: 0 16px; border-radius: 14px; color: #fff; background: var(--primary); text-decoration: none; font-size: 15px; font-weight: 820; }
.catalog-link.secondary { color: var(--primary); background: var(--teal-soft); }
@media (max-width: 820px) {
  .container { width: min(calc(100% - 36px), var(--max)); }
  .sales-hero { padding: 24px 0 30px; }
  .hero-layout { min-height: auto; grid-template-columns: 1fr; grid-template-rows: auto auto auto; gap: 16px; }
  .hero-copy, .hero-buy, .lesson-preview { grid-column: 1; align-self: auto; }
  .hero-copy { grid-row: 1; }
  .lesson-preview { grid-row: 2; }
  .hero-buy { grid-row: 3; padding-top: 0; }
  h1 { font-size: 40px; line-height: 1.04; letter-spacing: -.04em; }
  .lead { margin-top: 13px; font-size: 17px; line-height: 1.45; }
  .context-line { margin-top: 12px; }
  .lesson-preview { padding: 16px; }
  .phrase { font-size: 22px; }
  .audio-format, .example { display: none; }
  .message-head { margin-bottom: 12px; }
  .hero-price { margin-bottom: 10px; }
  .hero-buy .cta { width: 100%; }
  .facts { margin-top: 12px; }
  .section { padding: 54px 0; }
  .proof-grid, .honest-box { grid-template-columns: 1fr; }
  .situation-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .step, .step:first-child, .step:last-child { padding: 0 0 0 20px; border-left: 1px solid rgba(255,255,255,.15); }
  .step span { margin-bottom: 7px; }
  .price-table { grid-template-columns: 1fr; }
  .price-plan, .price-plan:first-child { border-left: 0; border-top: 1px solid var(--line); }
  .price-plan:first-child { border-top: 0; }
  .pricing-foot { align-items: stretch; flex-direction: column; }
  .pricing-foot .cta { width: 100%; }
  .final-cta { align-items: stretch; flex-direction: column; padding: 28px 22px; }
  .final-cta .cta { width: 100%; }
  .sticky-buy { display: flex; }
  .catalog-grid { grid-template-columns: 1fr; }
  .catalog-card { min-height: 0; }
}
@media (max-width: 430px) {
  .container { width: calc(100% - 36px); }
  .topbar { height: 54px; }
  .brand { font-size: 19px; }
  .brand-mark { width: 30px; height: 30px; }
  .telegram-note span { display: none; }
  .sales-hero { padding-top: 21px; }
  .badge { margin-bottom: 12px; }
  h1 { font-size: 38px; line-height: 1.045; letter-spacing: -.035em; }
  .context-line { font-size: 13px; }
  .lesson-preview { border-radius: 18px; box-shadow: 0 14px 38px rgba(16,36,62,.10); }
  .phrase { font-size: 20px; }
  .hero-price strong { font-size: 24px; }
  .section-head { margin-bottom: 25px; }
  h2 { font-size: 30px; }
  .section-head > p:last-child { font-size: 17px; }
  .daily-card, .pricing-box { padding: 20px; }
  .honest-box { gap: 17px; padding: 24px 20px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .catalog-hero { padding: 42px 0 28px; text-align: left; }
  .catalog-hero .badge, .catalog-hero h1, .catalog-hero .lead { margin-left: 0; }
  .catalog-grid { padding-bottom: 54px; }
}
@media (max-width: 350px) {
  .container { width: calc(100% - 32px); }
  .hero-buy { grid-row: 2; }
  .lesson-preview { grid-row: 3; }
  h1 { font-size: 34px; line-height: 1.055; }
  .lead { font-size: 16px; }
  .facts { gap: 7px; font-size: 12px; }
  .lesson-preview { padding: 14px; }
  .phrase { font-size: 19px; }
}
.handoff-main { min-height: calc(100vh - 68px); display: grid; place-items: center; padding: 36px 0; }
.handoff-card { max-width: 610px; margin: auto; padding: clamp(24px,5vw,48px); border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: 0 18px 50px #10243e14; }
.handoff-card h1 { font-size: clamp(2rem,5vw,3rem); }
.handoff-card .lead { margin-bottom: 18px; }
.handoff-note { color: var(--muted); font-size: .95rem; margin: 0 0 24px; }
.handoff-card .cta { width: 100%; }
.handoff-alternative { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; margin-top: 12px; padding: 12px 18px; border: 1px solid var(--primary); border-radius: 12px; text-align: center; color: var(--primary); font-weight: 700; font-size: .95rem; text-decoration: none; }
.handoff-alternative:hover, .handoff-alternative:focus-visible { background: #edf4fb; }
.handoff-help { margin: 18px 0 0; color: var(--muted); font-size: .85rem; }
@media (max-width: 640px) and (max-height: 650px) {
  .hero-copy { grid-row: 1; }
  .hero-buy { grid-row: 2; }
  .lesson-preview { grid-row: 3; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

/* Readable type, honest lesson samples and purchase-first mobile layout. */
body { font-size: 1.0625rem; }
h1 { font-size: clamp(2.5rem, 5vw, 3.8rem); line-height: 1.08; letter-spacing: -.035em; }
h2 { line-height: 1.16; letter-spacing: -.03em; }
.topbar { height: auto; min-height: 68px; }
.social-nav { display: flex; gap: 2px; }
.social-nav a { display: grid; place-items: center; width: 44px; min-height: 44px; color: #536374; border-radius: 10px; }
.social-nav a:hover { background: #e9eef3; color: #173f70; }
.social-nav svg { width: 20px; height: 20px; }
.brand-mark, .avatar { background: var(--primary); color: #fff; }
.badge { font-size: .75rem; line-height: 1.5; letter-spacing: .025em; text-transform: none; }
.badge::before { display: none; }
.lead { font-size: 1.125rem; }
.hero-layout { min-height: 520px; column-gap: 64px; }
.hero-price { display: block; }
.hero-price strong { font-size: 1.875rem; }
.hero-price strong small { color: var(--muted); font-size: 1rem; font-weight: 500; }
.hero-price > span { display: block; min-height: 23px; font-size: .875rem; }
.payment-note { font-size: .8125rem; line-height: 1.55; max-width: 430px; color: #536374; }
.facts { gap: 8px 16px; font-size: .8125rem; }
.facts span { display: flex; align-items: center; gap: 6px; }
.facts span::before { content: '✓'; color: var(--teal); font-weight: 800; }
.lesson-preview { padding: 28px; border-radius: 22px; box-shadow: 0 16px 48px #10243e0c; }
.lesson-preview::before { display: none; }
.message-head .avatar { display: grid; place-items: center; color: #fff; font-size: 1rem; }
.message-head strong { font-size: 1rem; }
.message-head div span { color: var(--muted); font-size: .8125rem; }
.lesson-label, .example small, .section-kicker, .catalog-tag { font-size: .8125rem; }
.phrase { font-size: 1.875rem; line-height: 1.3; margin-top: 12px; }
.transcription { font-size: .875rem; overflow-wrap: anywhere; margin-top: 8px; }
.translation { font-size: 1rem; margin: 10px 0 22px; }
.example p { font-size: 1rem; line-height: 1.6; }
.preview-caption { font-size: .8125rem; color: var(--muted); margin: 18px 0 0; }
.section { padding: 68px 0; }
.section-dark .section-kicker, .section-dark .step span { color: #fff; }
.section-dark .section-head > p:last-child, .section-dark .step p, .daily-card.main p { color: #d7e1ec; }
.section-head > p:last-child { font-size: 1.0625rem; }
.daily-card.main { background: #173f70; border-color: #173f70; }
.daily-card.main .format-list b { color: #173f70; background: #fff; }
.format-list { gap: 18px; }
.format-list b { font-size: .75rem; }
.sample-row small, .sample-row span, .context-line, .situation-number, .price-plan > span, .price-plan small { font-size: .875rem; }
.situation p, .step p, .faq p, .catalog-card > p { font-size: 1rem; line-height: 1.65; }
.price-plan .local-price { font-size: .8125rem; min-height: 21px; }
.price-plan.best { background: #eef3f8; }
.annual-note { font-size: .8125rem; color: var(--muted); margin-bottom: 0; }
.rate-note { font-size: .8125rem; line-height: 1.6; }
.currency-control { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; padding-top: 24px; font-size: .8125rem; color: var(--muted); }
.currency-control select { max-width: 100%; min-height: 44px; padding: 8px 28px 8px 12px; border: 1px solid #c3ccd5; border-radius: 8px; background: #fff; color: var(--ink); font: inherit; }
.currency-control [role=status] { flex-basis: 100%; min-height: 20px; }
.cta { font-size: 1rem; padding: 14px 24px; text-align: center; line-height: 1.4; }
.final-cta p { color: #e3ebf4; font-size: .875rem; }
.footer small, .footer-links a { font-size: .8125rem; color: var(--muted); }
.sticky-buy { visibility: hidden; pointer-events: none; }
.sticky-buy.is-visible { visibility: visible; pointer-events: auto; }
.sticky-price span { font-size: .75rem; }
.catalog-sample span { font-size: .875rem; }
.catalog-price span { font-size: .8125rem; }
.catalog-link { gap: 12px; font-size: 1rem; }
@media (min-width: 821px) { .catalog-card > p { min-height: 3.3em; } .catalog-sample { min-height: 140px; } }
a:focus-visible, summary:focus-visible, select:focus-visible { outline: 3px solid #c77800; outline-offset: 4px; }
@media (max-width: 1000px) and (min-width: 821px) {
  .hero-layout { column-gap: 30px; grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
  .catalog-grid { gap: 12px; }
  .catalog-card { padding: 20px; }
}
@media (max-width: 820px) {
  .sales-hero { padding: 24px 0 36px; }
  .hero-layout { min-height: auto; gap: 20px; }
  .hero-copy { grid-row: 1; }
  .hero-buy { grid-row: 2; }
  .lesson-preview { grid-row: 3; margin-top: 12px; padding: 24px; }
  .example { display: block; }
  h1 { font-size: clamp(2rem, 5.5vw, 2.75rem); }
  h2 { font-size: 1.875rem; }
  .lead { font-size: 1.0625rem; }
  .section { padding: 48px 0; }
  .hero-price > span:empty { min-height: 0; }
  .phrase { font-size: 1.625rem; }
  .hero-price { margin-bottom: 12px; }
  .topbar-inner { gap: 8px; }
  .pricing-box { padding: 20px; }
}
@media (max-width: 430px) {
  .container { width: calc(100% - 36px); }
  .brand { font-size: 1.125rem; gap: 6px; }
  .brand-mark { width: 28px; height: 28px; }
  .social-nav { gap: 0; }
  .social-nav a { width: 36px; }
  .social-nav svg { width: 18px; height: 18px; }
  h1 { font-size: 2.125rem; }
  .badge { margin-bottom: 12px; }
  .context-line { font-size: .8125rem; }
  .hero-layout { gap: 16px; }
  .hero-buy .cta { min-height: 54px; }
  .lesson-preview { padding: 22px; }
  .facts { font-size: .75rem; gap: 6px 10px; }
}
@media (max-width: 350px) {
  .container { width: calc(100% - 28px); }
  .brand { font-size: 1rem; }
  .brand-mark { width: 25px; height: 25px; }
  .social-nav a { width: 34px; }
  h1 { font-size: 1.875rem; }
  .lead { font-size: 1rem; }
  .sticky-buy { left: 6px; right: 6px; gap: 8px; }
  .sticky-buy .cta { font-size: .8125rem; }
}