/* The Tech-Smart Family — cover-matched red aesthetic */
:root {
  --bg: #faf7f5;
  --bg-alt: #f4eeec;
  --surface: #ffffff;
  --ink: #1f1a19;
  --ink-soft: #4a4442;
  --muted: #6f6866;
  --accent: #c63934;
  --accent-dark: #a02824;
  --accent-soft: #f8e8e7;
  --warm: #c63934;
  --warm-dark: #a02824;
  --border: #e8dfdd;
  --focus: #a02824;
  --radius: 12px;
  --shadow: 0 10px 32px rgba(160, 40, 36, 0.12);
  --shadow-cover: 0 22px 56px rgba(31, 26, 25, 0.38), 0 8px 20px rgba(160, 40, 36, 0.28);
  --max: 70rem;
  --font: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-display: "Montserrat", "Source Sans 3", system-ui, sans-serif;
  --wave-motif: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 600' fill='none'%3E%3Cpath d='M40 0C55 80 25 160 40 240C55 320 25 400 40 480C48 520 52 560 40 600' stroke='%23a02824' stroke-width='3.5' stroke-linecap='round'/%3E%3Cpath d='M70 0C85 80 55 160 70 240C85 320 55 400 70 480C78 520 82 560 70 600' stroke='%23a02824' stroke-width='3.5' stroke-linecap='round'/%3E%3Cpath d='M100 0C115 80 85 160 100 240C115 320 85 400 100 480C108 520 112 560 100 600' stroke='%23a02824' stroke-width='3.5' stroke-linecap='round'/%3E%3Cpath d='M130 0C145 80 115 160 130 240C145 320 115 400 130 480C138 520 142 560 130 600' stroke='%23a02824' stroke-width='3.5' stroke-linecap='round'/%3E%3Cpath d='M160 0C175 80 145 160 160 240C175 320 145 400 160 480C168 520 172 560 160 600' stroke='%23a02824' stroke-width='3.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-dark); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: 0.75rem 1rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 245, 0.94);
  backdrop-filter: blur(10px);
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem; padding: 0.85rem 0; flex-wrap: wrap;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.1rem; color: var(--accent-dark);
  text-decoration: none; line-height: 1.2; letter-spacing: -0.01em;
}
.logo span { display: block; font-size: 0.72rem; font-family: var(--font); font-weight: 500; color: var(--muted); letter-spacing: 0.02em; }
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); background: var(--surface);
  border-radius: 8px; padding: 0.55rem 0.75rem; cursor: pointer; color: var(--ink);
  margin-left: auto;
}
.site-nav { display: none; width: 100%; order: 3; }
.site-nav.is-open {
  display: block;
  background: var(--bg); border-top: 1px solid var(--border);
  padding: 0.75rem 0 0.25rem;
}
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.35rem; }
.site-nav a {
  display: block; text-decoration: none; color: var(--ink-soft);
  padding: 0.55rem 0.65rem; border-radius: 8px; font-weight: 600;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent-dark); }
/* Header CTA stays visible on all breakpoints — never hide with display:none */
.header-cta {
  display: inline-flex;
  font-size: 0.875rem;
  padding: 0.55rem 0.95rem;
  white-space: nowrap;
}
.nav-amazon a { color: var(--accent-dark); }

@media (min-width: 860px) {
  .header-inner { flex-wrap: nowrap; gap: 1rem; }
  .nav-toggle { display: none; }
  .site-nav {
    display: block; position: static; border: 0; padding: 0;
    background: transparent; width: auto; order: 0;
  }
  .site-nav ul { flex-direction: row; align-items: center; gap: 0.15rem; }
  .site-nav a { padding: 0.45rem 0.7rem; font-size: 0.95rem; }
  .header-cta { font-size: 1rem; padding: 0.85rem 1.35rem; }
  .nav-amazon { display: none; }
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.85rem 1.35rem; border-radius: 999px; border: 2px solid transparent;
  font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-secondary { background: var(--accent-dark); color: #fff; }
.btn-secondary:hover { background: #861f1c; color: #fff; }
.btn-outline { background: transparent; border-color: var(--accent); color: var(--accent-dark); }
.btn-outline:hover { background: var(--accent-soft); color: var(--accent-dark); }
.btn-lg { padding: 1rem 1.6rem; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn-sm { padding: 0.55rem 1rem; font-size: 0.9rem; }

.amazon-cta-pair {
  display: flex; flex-wrap: wrap; gap: 0.65rem; align-items: center;
}
.amazon-cta-pair .btn-block { width: auto; flex: 1 1 12rem; }
.formats-note {
  color: var(--ink-soft); font-size: 0.95rem; margin: 0 0 1rem;
}
.hero .formats-note { color: rgba(255, 255, 255, 0.9); }
.hero-text-link {
  display: inline-flex; align-items: center;
  color: #fff; font-weight: 700; font-size: 1.05rem;
  text-decoration: underline; text-underline-offset: 0.2em;
  padding: 0.85rem 0.25rem;
}
.hero-text-link:hover { color: #fff8f7; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 3.25rem 0 3rem;
  background: var(--accent);
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: min(48%, 320px);
  background: var(--wave-motif) left center / 100% 140% no-repeat;
  opacity: 0.7;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.2fr 0.8fr; gap: 2.5rem; } }
.eyebrow {
  display: inline-block; font-size: 0.85rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.75rem;
}
.hero .eyebrow { color: rgba(255, 255, 255, 0.88); }
h1, h2, h3, h4 {
  font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--ink);
  margin: 0 0 0.75rem; letter-spacing: -0.02em;
}
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
.hero h1 { color: #fff; }
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 40rem; }
.hero .lead { color: rgba(255, 255, 255, 0.94); }
.hero .lead strong { color: #fff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; align-items: center; }
.hero .btn-primary {
  background: #fff;
  color: var(--accent);
}
.hero .btn-primary:hover {
  background: #fff8f7;
  color: var(--accent-dark);
}
.hero .btn-outline {
  border-color: #fff;
  color: #fff;
}
.hero .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}
.trust-row {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; margin-top: 1.5rem;
  color: var(--muted); font-size: 0.95rem;
}
.trust-row span::before { content: "✓ "; color: var(--accent); font-weight: 700; }
.hero .trust-row { color: rgba(255, 255, 255, 0.88); }
.hero .trust-row span::before { color: #fff; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem;
}
.book-card { text-align: center; }
.book-card .book-cover-img {
  max-width: 280px;
  width: 100%;
  margin: 0 auto 1.25rem;
  border-radius: 6px;
  box-shadow: var(--shadow-cover);
}
@media (min-width: 900px) {
  .book-card .book-cover-img { max-width: 340px; }
}
/* Hero: no white nested card framing */
.hero .book-card {
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
}
.book-cover {
  aspect-ratio: 2 / 3; max-width: 220px; margin: 0 auto 1.25rem;
  border-radius: 8px; background: var(--accent);
  color: #fff; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.25rem; text-align: left; box-shadow: var(--shadow);
}
.book-cover strong { font-family: var(--font-display); font-size: 1.2rem; display: block; margin-bottom: 0.35rem; }
.book-cover em { font-style: normal; font-size: 0.85rem; opacity: 0.9; }
.book-cover small { display: block; margin-top: 1rem; opacity: 0.8; font-size: 0.8rem; }

section { padding: 3rem 0; }
.section-alt { background: var(--bg-alt); }
.section-accent { background: var(--accent-soft); }
.section-head { max-width: 40rem; margin-bottom: 1.75rem; }
.section-head p { color: var(--ink-soft); margin: 0; }

.grid-2, .grid-3 { display: grid; gap: 1.25rem; }
@media (min-width: 700px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 860px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.feature {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.35rem;
}
.feature .icon {
  width: 2.5rem; height: 2.5rem; border-radius: 10px;
  display: grid; place-items: center; background: var(--accent-soft);
  color: var(--accent-dark); font-weight: 700; margin-bottom: 0.85rem;
}
.feature p { margin: 0; color: var(--ink-soft); }

.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li {
  position: relative; padding-left: 1.75rem; margin-bottom: 0.75rem; color: var(--ink-soft);
}
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 0.45rem;
  width: 0.9rem; height: 0.9rem; border-radius: 50%;
  background: var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23fff' stroke-width='2' d='M3 8l3 3 7-7'/%3E%3C/svg%3E") center/70% no-repeat;
}

.age-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1rem;
}
.age-card h2 { color: var(--accent-dark); font-size: 1.35rem; }
.age-card h3 { color: var(--accent-dark); }
.age-meta {
  display: inline-block; background: var(--accent-soft); color: var(--accent-dark);
  font-size: 0.85rem; font-weight: 700; padding: 0.25rem 0.65rem; border-radius: 999px;
  margin-bottom: 0.75rem;
}
.prose { max-width: 44rem; }
.prose p { color: var(--ink-soft); }
.prose ul, .prose ol { color: var(--ink-soft); padding-left: 1.25rem; }
.prose li { margin-bottom: 0.45rem; }

.cta-band {
  position: relative;
  overflow: hidden;
  background: var(--accent);
  color: #fff; border-radius: calc(var(--radius) + 4px); padding: 2rem;
  display: grid; gap: 1rem; align-items: center;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: min(42%, 220px);
  background: var(--wave-motif) left center / 100% 160% no-repeat;
  opacity: 0.55;
  pointer-events: none;
}
.cta-band > * { position: relative; z-index: 1; }
@media (min-width: 760px) { .cta-band { grid-template-columns: 1.4fr auto; } }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band p { margin: 0; opacity: 0.92; }
.cta-band .btn-primary { background: #fff; color: var(--accent); }
.cta-band .btn-primary:hover { background: #fff8f7; color: var(--accent-dark); }
.cta-band .amazon-cta-pair .btn-outline {
  border-color: #fff; color: #fff;
}
.cta-band .amazon-cta-pair .btn-outline:hover {
  background: rgba(255,255,255,0.12); color: #fff;
}

.soft-cta {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin: 1.5rem 0;
}
.soft-cta p { margin: 0 0 0.85rem; color: var(--ink-soft); }
.soft-cta p:last-child { margin-bottom: 0; }

.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.15rem; margin-bottom: 0.75rem;
}
.faq summary {
  cursor: pointer; font-weight: 700; color: var(--ink);
  list-style: none; display: flex; justify-content: space-between; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.25rem; font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0.85rem 0 0; color: var(--ink-soft); }

.steps { counter-reset: step; display: grid; gap: 1rem; }
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem 1.25rem 1.25rem 4rem; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 1rem; top: 1.2rem;
  width: 2rem; height: 2rem; border-radius: 50%;
  background: var(--accent); color: #fff; display: grid; place-items: center;
  font-weight: 700; font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--border); padding: 2.5rem 0 2rem; background: #f0e8e6;
  margin-top: 2rem;
}
.footer-grid { display: grid; gap: 1.5rem; }
@media (min-width: 700px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.site-footer h2 { font-size: 1rem; margin-bottom: 0.65rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 0.4rem; }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--accent-dark); text-decoration: underline; }
.footer-note { margin-top: 1.75rem; padding-top: 1.25rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }

.breadcrumbs { font-size: 0.9rem; color: var(--muted); margin: 1.25rem 0 0; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent-dark); text-decoration: underline; }
.page-hero { padding: 1.5rem 0 2rem; }
.page-hero h1 { margin-bottom: 0.65rem; }

.compare {
  overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface);
}
.compare table { width: 100%; border-collapse: collapse; min-width: 540px; }
.compare th, .compare td { padding: 0.9rem 1rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.compare th { background: var(--accent-soft); color: var(--accent-dark); font-size: 0.95rem; }
.compare tr:last-child td { border-bottom: 0; }

.note {
  background: #fff5f4; border-left: 4px solid var(--accent);
  padding: 1rem 1.15rem; border-radius: 0 8px 8px 0; color: var(--ink-soft); margin: 1.25rem 0;
}

.author-links { margin: 0.5rem 0 0; }
.author-links a { font-weight: 600; color: var(--accent-dark); }