:root {
  --primary: #0f3b63;
  --secondary: #f59e0b;
  --dark: #102033;
  --text: #42526e;
  --light: #f5f7fb;
  --white: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 20px 45px rgba(15, 59, 99, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-weight: 800;
  color: var(--primary);
}

.logo-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), #1f6aa5);
}

.nav-menu {
  display: flex;
  gap: 26px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu a {
  font-weight: 700;
  color: var(--dark);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--secondary);
}

.nav-cta {
  padding: 11px 18px;
  border-radius: 999px;
  color: var(--white) !important;
  background: var(--primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background: var(--dark);
  border-radius: 999px;
}

.hero,
.book-hero {
  padding: 90px 0;
  background: radial-gradient(circle at top left, #eaf5ff, transparent 35%), linear-gradient(135deg, #ffffff, #f8fafc);
}

.hero-grid,
.book-grid,
.split-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero h1,
.page-hero h1,
.book-hero h1 {
  margin: 0 0 20px;
  color: var(--dark);
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -1.5px;
}

.hero p,
.page-hero p,
.book-hero p {
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--secondary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.6px;
  font-size: 0.82rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

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

.btn-secondary {
  color: var(--primary);
  background: #eaf5ff;
}

.btn-light {
  color: var(--primary);
  background: var(--white);
}

.btn-large {
  padding: 16px 28px;
  font-size: 1.03rem;
}

.hero-visual img,
.rounded-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.section {
  padding: 82px 0;
}

.bg-light {
  background: var(--light);
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading h2,
.split-grid h2,
.card h2,
.info-box h2,
.contact-form h2 {
  color: var(--dark);
  margin-top: 0;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.15;
}

.cards {
  display: grid;
  gap: 24px;
}

.three-columns {
  grid-template-columns: repeat(3, 1fr);
}

.card,
.info-box,
.contact-form,
.book-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(16, 32, 51, 0.06);
}

.card h3 {
  margin-top: 0;
  color: var(--dark);
}

.icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.check-list {
  padding: 0;
  margin: 24px 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 30px;
  color: var(--dark);
  font-weight: 600;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: 900;
}

.cta-section {
  background: var(--primary);
}

.cta-box {
  text-align: center;
  color: var(--white);
}

.cta-box h2 {
  margin: 0 0 12px;
  color: var(--white);
  font-size: clamp(2rem, 4vw, 3rem);
}

.page-hero {
  padding: 86px 0;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), #174f82);
}

.page-hero h1,
.page-hero p {
  max-width: 820px;
  color: var(--white);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.timeline article {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--border);
}

.timeline span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 50%;
  color: var(--white);
  background: var(--primary);
  font-weight: 900;
}

.timeline h3 {
  color: var(--dark);
}

.book-card {
  text-align: center;
}

.book-cover {
  margin-bottom: 24px;
  min-height: 230px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  padding: 28px;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.book-cover span,
.book-cover small {
  display: block;
}

.book-cover strong {
  display: block;
  font-size: 2rem;
}

.qr-wrapper {
  display: inline-block;
  padding: 14px;
  border-radius: 16px;
  background: var(--white);
  border: 1px solid var(--border);
}

.contact-grid {
  align-items: start;
}

.info-box {
  margin-top: 22px;
}

.info-box a {
  color: var(--primary);
  font-weight: 700;
}

.contact-form label {
  display: block;
  margin: 14px 0 7px;
  color: var(--dark);
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font: inherit;
  background: var(--white);
}

.contact-form textarea {
  resize: vertical;
}

.form-note {
  font-size: 0.9rem;
  color: #6b7280;
}

.site-footer {
  padding: 58px 0 0;
  color: #dbeafe;
  background: #071526;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1.1fr;
  gap: 36px;
}

.site-footer h3 {
  color: var(--white);
}

.site-footer ul {
  padding: 0;
  list-style: none;
}

.site-footer li {
  margin-bottom: 9px;
}

.site-footer a:hover {
  color: var(--secondary);
}

.footer-bottom {
  margin-top: 36px;
  padding: 18px;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.12);
}

@media (max-width: 900px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 78px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 20px 4%;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav-menu.show {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    display: block;
    padding: 14px 0;
  }

  .hero-grid,
  .book-grid,
  .split-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .three-columns,
  .timeline {
    grid-template-columns: 1fr;
  }

  .hero,
  .book-hero {
    padding: 64px 0;
  }

  .section {
    padding: 60px 0;
  }

  .hero h1,
  .page-hero h1,
  .book-hero h1 {
    font-size: 2.3rem;
  }
}

@media (max-width: 560px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .card,
  .info-box,
  .contact-form,
  .book-card {
    padding: 22px;
  }
}