*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-bg: #f8f9fb;
  --color-bg-alt: #eef3f7;
  --color-bg-offer: #e4f0f4;
  --color-text: #1a2b3c;
  --color-text-muted: #4a5d6e;
  --color-accent: #2a7f8f;
  --color-accent-hover: #236b78;
  --color-heading: #1e3a5f;
  --color-border: #d4dee6;
  --color-highlight: #fff8f0;
  --color-highlight-border: #f0c987;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1080px;
  --narrow-width: 640px;
  --section-padding: 2.5rem 1.25rem;
  --section-padding-lg: 5rem 1.5rem;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(30, 58, 95, 0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

.launch-banner {
  padding: 0.75rem 1.25rem;
  text-align: center;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--color-heading);
}

.launch-notice {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
}

a:focus-visible,
.btn:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.narrow {
  max-width: var(--narrow-width);
  margin-left: auto;
  margin-right: auto;
}

.center {
  text-align: center;
}

/* Hero */

.hero {
  padding: 2.5rem 0 3rem;
  background: linear-gradient(180deg, #fff 0%, var(--color-bg) 100%);
}

.hero__inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.hero__content {
  order: 2;
}

.hero__cover {
  order: 1;
  display: flex;
  justify-content: center;
}

.hero__cover img {
  max-width: 280px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-heading);
}

.lead {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.trust-line {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
}

.btn--secondary {
  margin-top: 1rem;
  background: #fff;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--secondary:hover {
  background: rgba(42, 127, 143, 0.08);
}

.btn--large {
  padding: 1rem 2.25rem;
  font-size: 1.125rem;
}

/* Sections */

.section {
  padding: var(--section-padding);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--offer {
  background: var(--color-bg-offer);
}

.section--cta-final {
  padding-bottom: 5rem;
}

.section-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  text-align: center;
  color: var(--color-heading);
}

.section-intro {
  max-width: var(--narrow-width);
  margin: 0 auto 2.5rem;
  text-align: center;
  color: var(--color-text-muted);
}

h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.375rem, 3.5vw, 1.75rem);
  color: var(--color-heading);
}

.section p {
  margin: 0 0 1rem;
}

.section p:last-child {
  margin-bottom: 0;
}

/* Value grid */

.value-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.value-card {
  padding: 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.value-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  color: var(--color-heading);
}

.value-card p {
  margin: 0;
  font-size: 0.975rem;
  color: var(--color-text-muted);
}

.value-card--highlight {
  background: var(--color-highlight);
  border-color: var(--color-highlight-border);
}

/* Journey timeline */

.journey {
  text-align: center;
  padding: 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.journey__label {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.journey__steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.journey__steps li {
  display: flex;
  align-items: center;
  font-weight: 600;
  color: var(--color-heading);
}

.journey__steps li:not(:last-child)::after {
  content: "";
  display: inline-block;
  width: 1.15em;
  height: 1.15em;
  margin: 0 0.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%232a7f8f'%3E%3Cpath transform='rotate(45 12 12)' d='M21 16v-2l-8-5V3.5c0-.83-.67-1.5-1.5-1.5S10 2.67 10 3.5V9l-8 5v2l8-2.5V19l-2 1.5V22l3.5-1 3.5 1v-1.5L13 19v-5.5l8 2.5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

/* Book cartoon */

.book-cartoon {
  margin: 2rem 0 0;
}

.book-cartoon img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius) * 1.5);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* Offer */

.offer {
  text-align: center;
}

.offer h2 {
  margin-bottom: 0.75rem;
}

.guarantee {
  margin-top: 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.sample-link {
  margin: 0 0 1rem;
  font-size: 0.975rem;
  color: var(--color-text-muted);
}

.guarantee a {
  color: var(--color-accent);
}

/* Testimonials */

.testimonials {
  display: grid;
  gap: 1.25rem;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial {
  margin: 0;
  padding: 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow);
}

.testimonial p {
  margin: 0 0 0.75rem;
  font-style: italic;
  color: var(--color-text);
}

.testimonial footer {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* FAQ */

.faq {
  display: grid;
  gap: 0.75rem;
}

.faq__item {
  padding: 0 1rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.faq__item summary {
  padding: 1rem 0;
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  list-style: none;
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: "+";
  float: right;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
}

.faq__item[open] summary::after {
  content: "−";
}

.faq__item p {
  margin: 0 0 1.5rem;
  padding-top: 0;
  font-size: 0.975rem;
  color: var(--color-text-muted);
}

/* Footer */

.footer {
  padding: 2rem 0 5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--color-text-muted);
}

/* Sticky mobile CTA */

.sticky-cta {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.95);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(30, 58, 95, 0.08);
  z-index: 100;
}

.sticky-cta .btn {
  display: block;
  width: 100%;
}

/* Desktop */

@media (min-width: 768px) {
  .hero {
    padding: var(--section-padding-lg);
  }

  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .hero__content {
    order: 1;
  }

  .hero__cover {
    order: 2;
  }

  .hero__cover img {
    max-width: 360px;
  }

  .section {
    padding: var(--section-padding-lg);
  }

  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials {
    grid-template-columns: repeat(2, 1fr);
  }

  .sticky-cta {
    display: none;
  }

  .footer {
    padding-bottom: 2rem;
  }

  .section--cta-final {
    padding-bottom: var(--section-padding-lg);
  }
}