:root {
  --bg: #f4fcff;
  --bg-soft: #eefbff;
  --surface: #ffffff;
  --surface-alt: #f7feff;
  --text: #163445;
  --muted: #56707f;
  --primary: #0caed9;
  --primary-dark: #0a7c9c;
  --accent: #ff7a59;
  --accent-soft: #fff0e8;
  --border: rgba(12, 174, 217, 0.14);
  --shadow: 0 20px 50px rgba(16, 51, 69, 0.1);
  --shadow-soft: 0 12px 30px rgba(16, 51, 69, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Nunito', Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 183, 3, 0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(12, 174, 217, 0.12), transparent 26%),
    linear-gradient(180deg, #fbfeff 0%, var(--bg) 100%);
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
input,
textarea,
select {
  font: inherit;
}

::selection {
  background: rgba(12, 174, 217, 0.22);
}

:focus-visible {
  outline: 3px solid rgba(12, 174, 217, 0.45);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 999;
  background: #fff;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
}

.container {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(12, 174, 217, 0.1);
}

.nav-wrap {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(180deg, #fff, #eefbff);
  box-shadow: 0 8px 18px rgba(16, 51, 69, 0.12);
}

.brand-text {
  font-family: 'Fredoka', Arial, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 800;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--primary-dark);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(12, 174, 217, 0.16);
  background: #fff;
  border-radius: 14px;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  margin: 4px auto;
  border-radius: 999px;
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 2rem;
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-dark);
}

.eyebrow-light {
  color: rgba(255, 255, 255, 0.84);
}

h1,
h2,
h3,
h4,
.brand-text {
  font-family: 'Fredoka', Arial, sans-serif;
  line-height: 1.08;
  color: var(--text);
}

h1 {
  font-size: clamp(2.6rem, 5vw, 4.7rem);
  margin: 0.75rem 0 1rem;
  max-width: 11ch;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin: 0.7rem 0 0.9rem;
}

h3 {
  font-size: 1.45rem;
  margin: 0 0 0.65rem;
}

p {
  margin: 0;
}

.hero-text,
.section-heading p,
.about-copy p,
.author-copy p,
.cta-grid p,
.faq-list p,
.hero-card p,
.stat-card span,
.book-body p,
.site-footer p,
.site-footer a {
  color: var(--muted);
}

.hero-actions,
.social-links,
.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0.85rem 1.2rem;
  border: 0;
  border-radius: 999px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 15px 30px rgba(12, 174, 217, 0.22);
}

.btn-secondary {
  background: #fff;
  color: var(--primary-dark);
  border: 1px solid rgba(12, 174, 217, 0.18);
}

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

.btn-block {
  width: 100%;
}

.hero-points {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding: 0;
  margin: 1.4rem 0 0;
}

.hero-points li {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  font-weight: 800;
  font-size: 0.94rem;
}

.hero-card,
.card-surface,
.book-card,
.author-panel,
.stat-card,
.faq-list details,
.feature-card,
.author-photo-card,
.cookie-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-card {
  border-radius: 32px;
  padding: 1.5rem;
}

.card-title {
  font-size: 1.85rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.feature-card {
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stats-bar {
  padding-bottom: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.stat-card {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
}

.stat-card strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 1rem;
}

.section {
  padding: 4.75rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(238, 251, 255, 0.9) 18%, rgba(244, 252, 255, 0.8));
}

.section-heading {
  margin-bottom: 2rem;
}

.centered {
  text-align: center;
  margin-inline: auto;
}

.narrow {
  max-width: 760px;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.book-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.book-cover-wrap {
  padding: 1rem 1rem 0;
}

.book-cover-wrap img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
  background: #eef7fb;
}

.book-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.2rem 1.2rem 1.4rem;
}

.book-tag {
  display: inline-block;
  width: fit-content;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.book-body .btn {
  margin-top: auto;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 2rem;
  align-items: center;
}

.card-surface {
  padding: 1rem;
  border-radius: 30px;
}

.about-visual img {
  border-radius: 24px;
  background: linear-gradient(180deg, #fff, #f8fcff);
}

.meaning-box {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  margin: 1rem 0;
  padding: 0.95rem 1.05rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 24px rgba(16, 51, 69, 0.06);
}

.author-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 1.4rem;
  align-items: center;
  padding: 1.2rem;
  border-radius: 30px;
}

.author-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.author-photo-card {
  margin: 0;
  padding: 0.75rem;
  border-radius: 20px;
}

.author-images img {
  width: 100%;
  min-height: 320px;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.author-copy {
  display: grid;
  gap: 1rem;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

.faq-list details {
  border-radius: 18px;
  padding: 1rem 1.1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 900;
  list-style: none;
  position: relative;
  padding-right: 1.5rem;
}

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

.faq-list summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  color: var(--primary-dark);
}

.faq-list details[open] summary::after {
  content: '–';
}

.faq-list p {
  margin-top: 0.7rem;
}

.cta-band {
  background: linear-gradient(135deg, #0a7c9c, #0caed9 60%, #3ac7ee);
  color: #fff;
  padding: 4rem 0;
}

.cta-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(220px, 0.85fr);
  gap: 1rem;
  align-items: center;
}

.cta-grid h2,
.cta-grid p {
  color: #fff;
}

.cta-actions {
  display: flex;
  justify-content: flex-end;
}

.social-links-centered {
  justify-content: center;
}

.site-footer {
  background: #0d3446;
  color: rgba(255, 255, 255, 0.94);
  padding-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.7fr 0.7fr;
  gap: 1.5rem;
}

.site-footer h3,
.site-footer h4 {
  margin: 0 0 0.8rem;
  color: #fff;
}

.site-footer a {
  display: block;
  margin-bottom: 0.45rem;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #fff;
}

.footer-bottom {
  margin-top: 2rem;
  padding: 1.35rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.cookie-banner {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  width: min(calc(100% - 2rem), 720px);
  border-radius: 24px;
  padding: 1rem 1rem 1.1rem;
  z-index: 100;
}

.cookie-copy {
  display: grid;
  gap: 0.35rem;
}

.cookie-title {
  color: var(--text);
  font-weight: 900;
}

.cookie-btn {
  min-width: 140px;
}

@media (max-width: 980px) {
  .hero-grid,
  .feature-grid,
  .stats-grid,
  .book-grid,
  .about-grid,
  .author-panel,
  .cta-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: none;
  }

  .cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    padding: 0.7rem 0.8rem;
    border-radius: 12px;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: #f5fcff;
  }

  .hero {
    padding-top: 2.75rem;
  }

  .section {
    padding: 3.75rem 0;
  }

  .hero-card,
  .author-panel,
  .cookie-banner {
    padding: 1rem;
  }
}

@media (max-width: 640px) {
  .brand-text {
    font-size: 1rem;
  }

  .author-images {
    grid-template-columns: 1fr;
  }

  .author-images img {
    min-height: 240px;
  }

  .btn,
  .cookie-btn {
    width: 100%;
  }

  .hero-actions,
  .social-links,
  .cookie-actions {
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover {
    transform: none;
  }
}