:root {
  --font-geist: Arial;
  --navy-950: #030b2b;
  --navy-900: #071443;
  --navy-800: #0b1e5b;
  --navy-700: #12347f;
  --cyan-500: #20c7f4;
  --cyan-400: #56d9fb;
  --cyan-100: #dff7ff;
  --ink: #091432;
  --muted: #5b6681;
  --line: #dfe7f1;
  --paper: #f5f8fc;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(2, 12, 52, 0.18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-geist), Arial, Helvetica, sans-serif;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: absolute;
  z-index: 20;
  top: 0;
  left: 50%;
  display: flex;
  width: min(1160px, calc(100% - 40px));
  transform: translateX(-50%);
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding: 18px 0;
}

.brand { display: inline-flex; align-items: flex-end; color: white; letter-spacing: -0.04em; }
.brand-mark {
  border-bottom: 3px solid var(--cyan-500);
  font-size: 30px;
  font-weight: 850;
  line-height: 1;
}
.brand-word {
  margin-left: 4px;
  border-top: 2px solid white;
  border-bottom: 2px solid white;
  padding: 1px 5px 2px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.1;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0 26px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .text-link:focus-visible, .brand:focus-visible {
  outline: 3px solid white;
  outline-offset: 4px;
}
.button-small {
  min-height: 42px;
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.06);
  color: white;
  font-size: 12px;
}
.button-small:hover { border-color: var(--cyan-400); background: rgba(32, 199, 244, 0.15); }
.button-primary {
  background: linear-gradient(135deg, var(--cyan-400), var(--cyan-500));
  box-shadow: 0 16px 35px rgba(32, 199, 244, 0.28);
  color: var(--navy-950);
}
.button-primary:hover { box-shadow: 0 20px 42px rgba(32, 199, 244, 0.42); }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 720px;
  background:
    radial-gradient(circle at 76% 42%, rgba(19, 100, 181, 0.42), transparent 28%),
    linear-gradient(135deg, var(--navy-950), var(--navy-900) 58%, #081c54);
  color: white;
}
.hero::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(32, 199, 244, 0.2) 1px, transparent 1px);
  background-size: 29px 29px;
  content: "";
  mask-image: linear-gradient(to right, black, transparent 48%);
  opacity: 0.7;
}
.hero-orb { position: absolute; border: 1px solid rgba(32, 199, 244, 0.3); border-radius: 50%; }
.hero-orb-one { top: -240px; right: -180px; width: 520px; height: 520px; }
.hero-orb-two { bottom: -170px; left: -220px; width: 430px; height: 430px; }

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 720px;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: 56px;
  padding-top: 92px;
}
.eyebrow {
  margin: 0 0 18px;
  color: var(--cyan-400);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(48px, 6vw, 78px);
  font-weight: 850;
  letter-spacing: -0.06em;
  line-height: 0.98;
  text-transform: uppercase;
}
.hero h1 span { display: block; color: var(--cyan-400); }
.hero h2 {
  margin: 25px 0 0;
  color: var(--cyan-400);
  font-size: clamp(20px, 2.3vw, 29px);
  letter-spacing: -0.02em;
}
.hero-description {
  max-width: 620px;
  margin: 18px 0 0;
  color: #dbe6ff;
  font-size: 18px;
  line-height: 1.72;
}
.hero-actions { display: flex; align-items: center; gap: 20px; margin-top: 30px; }
.text-link { color: #dbe6ff; font-size: 14px; font-weight: 700; }
.text-link:hover { color: var(--cyan-400); }
.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 26px 0 0;
  padding: 0;
  color: #dbe6ff;
  font-size: 13px;
  list-style: none;
}
.trust-list li { display: flex; align-items: center; gap: 7px; }
.trust-list span {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid rgba(86, 217, 251, 0.45);
  border-radius: 50%;
  color: var(--cyan-400);
}

.hero-visual { position: relative; display: grid; min-height: 540px; place-items: center; }
.hero-visual img {
  position: relative;
  z-index: 2;
  width: min(100%, 555px);
  filter: drop-shadow(0 34px 45px rgba(0, 0, 0, 0.38));
}
.book-glow {
  position: absolute;
  width: 72%;
  height: 72%;
  border-radius: 50%;
  background: rgba(32, 199, 244, 0.18);
  filter: blur(70px);
}
.floating-badge {
  position: absolute;
  z-index: 4;
  right: -10px;
  bottom: 78px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  background: rgba(4, 14, 50, 0.78);
  box-shadow: var(--shadow);
  padding: 15px 18px;
  backdrop-filter: blur(14px);
}
.floating-badge strong { color: white; font-size: 13px; }
.floating-badge span { margin-top: 3px; color: var(--cyan-400); font-size: 11px; }

.section { padding: 92px 0; }
.section-light { background: var(--paper); }
.section-heading { max-width: 760px; margin: 0 auto 46px; text-align: center; }
.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -0.045em;
  line-height: 1.08;
}
.section-heading > p:last-child {
  margin: 17px auto 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}
.eyebrow-dark { color: #087ca3; }
.card-grid { display: grid; gap: 18px; }
.pain-grid { grid-template-columns: repeat(4, 1fr); }
.info-card {
  min-height: 250px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: white;
  box-shadow: 0 14px 40px rgba(9, 20, 50, 0.07);
  padding: 26px;
}
.icon-bubble {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 18px;
  background: var(--cyan-100);
  color: var(--navy-700);
  font-size: 21px;
  font-weight: 900;
}
.info-card h3 { margin: 22px 0 0; font-size: 18px; letter-spacing: -0.02em; }
.info-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.section-dark {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 10% 10%, rgba(32, 199, 244, 0.12), transparent 25%),
    linear-gradient(135deg, var(--navy-950), var(--navy-900));
  color: white;
}
.section-dark::after {
  position: absolute;
  right: -160px;
  bottom: -240px;
  width: 500px;
  height: 500px;
  border: 1px solid rgba(32, 199, 244, 0.22);
  border-radius: 50%;
  content: "";
}
.section-heading-inverse { position: relative; z-index: 2; }
.section-heading-inverse h2 { color: white; }
.section-heading-inverse > p:last-child { color: #cad8f5; }
.lesson-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.lesson-card {
  display: flex;
  min-height: 180px;
  align-items: flex-start;
  gap: 17px;
  border: 1px solid rgba(126, 181, 255, 0.2);
  border-radius: 18px;
  background: rgba(12, 31, 87, 0.66);
  padding: 24px;
  backdrop-filter: blur(10px);
}
.lesson-icon {
  display: grid;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid rgba(86, 217, 251, 0.4);
  border-radius: 14px;
  background: rgba(32, 199, 244, 0.1);
  color: var(--cyan-400);
  font-size: 16px;
  font-weight: 900;
}
.lesson-card h3 { margin: 3px 0 0; font-size: 18px; }
.lesson-card p { margin: 9px 0 0; color: #bdcce8; font-size: 14px; line-height: 1.6; }

.audience-section { overflow: hidden; background: white; }
.split-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 80px;
}
.audience-copy h2 {
  margin: 0;
  font-size: clamp(36px, 4.3vw, 58px);
  letter-spacing: -0.05em;
  line-height: 1.05;
}
.lead { margin: 19px 0 0; color: var(--muted); font-size: 18px; line-height: 1.7; }
.check-list { display: grid; gap: 14px; margin: 30px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; align-items: flex-start; gap: 12px; color: #24304c; font-size: 16px; line-height: 1.5; }
.check-list span {
  display: grid;
  flex: 0 0 25px;
  width: 25px;
  height: 25px;
  place-items: center;
  border-radius: 50%;
  background: var(--cyan-100);
  color: #087ca3;
  font-size: 13px;
  font-weight: 900;
}
.cover-stage { position: relative; display: grid; min-height: 540px; place-items: center; }
.cover-backdrop {
  position: absolute;
  width: 78%;
  height: 78%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(32, 199, 244, 0.26), rgba(7, 20, 67, 0.04) 65%, transparent 66%);
}
.cover-stage img {
  position: relative;
  z-index: 2;
  width: min(60%, 330px);
  border-radius: 4px;
  box-shadow: 20px 28px 55px rgba(5, 20, 61, 0.26);
  transform: rotate(5deg);
}
.mini-stat {
  position: absolute;
  z-index: 3;
  bottom: 60px;
  left: 12px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  backdrop-filter: blur(14px);
}
.mini-stat strong { color: var(--navy-800); font-size: 18px; }
.mini-stat span { margin-top: 4px; color: var(--muted); font-size: 12px; }

.author-section {
  background: linear-gradient(120deg, var(--navy-950), var(--navy-800));
  color: white;
  padding: 64px 0;
}
.author-grid { display: grid; grid-template-columns: 170px 1fr; align-items: center; gap: 42px; }
.author-mark {
  display: grid;
  width: 150px;
  height: 150px;
  place-content: center;
  border: 1px solid rgba(86, 217, 251, 0.42);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  text-align: center;
}
.author-mark span { color: white; font-size: 42px; font-weight: 900; letter-spacing: -0.08em; line-height: 0.9; }
.author-mark small { margin-top: 6px; color: var(--cyan-400); font-size: 11px; font-weight: 900; letter-spacing: 0.24em; }
.author-grid .eyebrow { margin-bottom: 12px; }
.author-grid h2 { margin: 0; font-size: clamp(30px, 3.4vw, 44px); letter-spacing: -0.04em; }
.author-grid p:last-child { max-width: 780px; margin: 14px 0 0; color: #c9d6ee; font-size: 16px; line-height: 1.72; }

.offer-section { background: var(--paper); }
.offer-card {
  position: relative;
  display: grid;
  max-width: 1000px;
  margin: 0 auto;
  grid-template-columns: 0.75fr 1.25fr;
  align-items: center;
  gap: 58px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: white;
  box-shadow: 0 30px 80px rgba(7, 20, 67, 0.13);
  padding: 46px 58px;
}
.offer-card::before {
  position: absolute;
  top: -100px;
  left: -120px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: var(--cyan-100);
  content: "";
}
.offer-image { position: relative; z-index: 2; display: flex; justify-content: center; }
.offer-image img { width: min(100%, 250px); border-radius: 3px; box-shadow: 18px 24px 46px rgba(7, 20, 67, 0.3); transform: rotate(-3deg); }
.offer-copy { position: relative; z-index: 2; }
.offer-copy h2 { margin: 0; font-size: clamp(34px, 4vw, 52px); letter-spacing: -0.05em; line-height: 1.05; }
.offer-copy > p:not(.eyebrow) { margin: 16px 0 0; color: var(--muted); font-size: 16px; line-height: 1.65; }
.price-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 22px; margin: 26px 0 24px; }
.price-row > div { display: flex; flex-direction: column; }
.old-price { color: #778198; font-size: 15px; text-decoration: line-through; }
.price-row strong { margin-top: 4px; color: var(--navy-800); font-size: clamp(46px, 6vw, 66px); letter-spacing: -0.06em; line-height: 1; }
.payment-note { border-radius: 999px; background: var(--cyan-100); padding: 8px 12px; color: #087ca3; font-size: 12px; font-weight: 800; }
.button-wide { width: 100%; }
.button-wide:focus-visible { outline-color: var(--navy-800); }
.offer-trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 20px; margin: 20px 0 0; padding: 0; color: var(--muted); font-size: 12px; list-style: none; }

.guarantee-section { background: white; padding: 0 0 90px; }
.guarantee-card {
  display: grid;
  grid-template-columns: 88px 1fr;
  align-items: center;
  gap: 26px;
  border: 1px solid #bfe9f6;
  border-radius: 22px;
  background: linear-gradient(100deg, #effbff, #f8fdff);
  padding: 30px 38px;
}
.shield {
  display: grid;
  width: 72px;
  height: 82px;
  place-items: center;
  border: 3px solid #0b9ac7;
  border-radius: 24px 24px 34px 34px;
  color: #0b9ac7;
  font-size: 30px;
  font-weight: 900;
}
.guarantee-card .eyebrow { margin-bottom: 8px; }
.guarantee-card h2 { margin: 0; font-size: 32px; letter-spacing: -0.04em; }
.guarantee-card p:last-child { max-width: 900px; margin: 9px 0 0; color: var(--muted); line-height: 1.65; }

.faq-section { background: var(--paper); }
.faq-wrap { max-width: 900px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
  box-shadow: 0 10px 28px rgba(9, 20, 50, 0.05);
  padding: 0 22px;
}
.faq-list summary {
  display: flex;
  min-height: 68px;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 16px;
  font-weight: 800;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: #0b9ac7; font-size: 25px; font-weight: 500; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { margin: -4px 0 22px; color: var(--muted); line-height: 1.65; }

.final-cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--navy-950), var(--navy-800));
  color: white;
  padding: 72px 0;
}
.final-cta::after {
  position: absolute;
  top: -180px;
  right: -150px;
  width: 430px;
  height: 430px;
  border: 1px solid rgba(32, 199, 244, 0.35);
  border-radius: 50%;
  content: "";
}
.final-cta-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 45px; }
.final-cta h2 { margin: 0; font-size: clamp(38px, 5vw, 60px); letter-spacing: -0.05em; }
.final-cta p:last-child { margin: 12px 0 0; color: #c9d6ee; font-size: 17px; }

footer { background: #020721; color: #9eaeca; padding: 25px 0; }
.footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-grid .brand { transform: scale(0.8); transform-origin: left center; }
.footer-grid p { margin: 0; font-size: 12px; }
.mobile-cta { display: none; }

@media (max-width: 940px) {
  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 20px;
    padding-top: 150px;
    padding-bottom: 70px;
  }
  .hero-copy { text-align: center; }
  .hero-description { margin-inline: auto; }
  .hero-actions, .trust-list { justify-content: center; }
  .hero-visual { min-height: 420px; }
  .hero-visual img { width: min(100%, 460px); }
  .floating-badge { right: 8%; bottom: 38px; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .lesson-grid { grid-template-columns: repeat(2, 1fr); }
  .split-grid { grid-template-columns: 1fr; gap: 28px; }
  .audience-copy { text-align: center; }
  .check-list { max-width: 660px; margin-inline: auto; text-align: left; }
  .cover-stage { min-height: 460px; }
  .offer-card { grid-template-columns: 0.7fr 1.3fr; gap: 35px; padding: 38px; }
  .final-cta-grid { grid-template-columns: 1fr; text-align: center; }
  .final-cta .button { justify-self: center; }
}

@media (max-width: 620px) {
  .container, .site-header { width: min(100% - 28px, 1160px); }
  .site-header { padding-top: 14px; }
  .button-small { min-height: 38px; padding: 0 15px; font-size: 10px; }
  .brand-mark { font-size: 25px; }
  .hero-grid { padding-top: 120px; }
  .hero h1 { font-size: 44px; }
  .hero-description { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .button-primary { width: 100%; }
  .trust-list { gap: 12px 18px; }
  .hero-visual { min-height: 340px; }
  .floating-badge { right: 0; bottom: 12px; }
  .section { padding: 68px 0; }
  .pain-grid { grid-template-columns: 1fr; }
  .info-card { min-height: 0; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-card { min-height: 0; }
  .audience-copy h2 { font-size: 39px; }
  .cover-stage { min-height: 410px; }
  .cover-stage img { width: min(65%, 260px); }
  .mini-stat { bottom: 36px; left: 0; }
  .author-grid { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .author-mark { width: 120px; height: 120px; }
  .offer-card { grid-template-columns: 1fr; gap: 38px; border-radius: 22px; padding: 38px 22px 30px; }
  .offer-card::before { top: -150px; left: 50%; transform: translateX(-50%); }
  .offer-image img { width: 165px; }
  .offer-copy { text-align: center; }
  .price-row { flex-direction: column; align-items: center; }
  .guarantee-section { padding-bottom: 68px; }
  .guarantee-card { grid-template-columns: 1fr; justify-items: center; padding: 28px 22px; text-align: center; }
  .final-cta { padding: 60px 0 95px; }
  .final-cta .button { width: 100%; }
  .footer-grid { flex-direction: column; text-align: center; padding-bottom: 66px; }
  .mobile-cta {
    position: fixed;
    z-index: 50;
    right: 12px;
    bottom: 12px;
    left: 12px;
    display: flex;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--cyan-400), var(--cyan-500));
    box-shadow: 0 14px 34px rgba(3, 11, 43, 0.38);
    color: var(--navy-950);
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
  }
}