/* =========================================================================
   CYBER ELEMENTARY — SHARED STYLESHEET
   Used by every page. Colors and fonts are defined once as CSS variables
   at the top, so re-theming the whole site means editing a few lines here.
   ========================================================================= */

:root {
  --navy:        #14213D;
  --navy-light:  #1F3157;
  --teal:        #2EC4B6;
  --teal-dark:   #1FA99B;
  --amazon:      #FF9900;
  --amazon-dark: #E88A00;
  --coral:       #FF6B6B;
  --bg:          #F6F8FC;
  --card-bg:     #FFFFFF;
  --ink:         #16213E;
  --ink-soft:    #4A5568;
  --border:      #E3E8F0;
  --radius:      16px;
  --radius-sm:   10px;
  --shadow:      0 4px 16px rgba(20, 33, 61, 0.08);
  --shadow-hover:0 10px 28px rgba(20, 33, 61, 0.14);
  --max-width:   1120px;
  --font-head:   'Baloo 2', 'Poppins', system-ui, sans-serif;
  --font-body:   'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

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

a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.2;
  margin: 0 0 0.5em 0;
  color: var(--navy);
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Skip link (accessibility) ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--teal);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

/* ---------- Top promo strip ---------- */
.promo-strip {
  background: var(--navy);
  color: #fff;
  font-size: 0.85rem;
  text-align: center;
  padding: 8px 16px;
}
.promo-strip a { color: var(--teal); text-decoration: underline; font-weight: 700; }

/* ---------- Header / Nav ---------- */
header.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
}
.brand .logo-badge {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--teal), var(--navy));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.3rem;
  overflow: hidden;
}
.brand .logo-badge img { width: 100%; height: 100%; object-fit: contain; padding: 3px; }
nav.main-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
nav.main-nav a {
  text-decoration: none;
  font-weight: 700;
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}
nav.main-nav a:hover,
nav.main-nav a[aria-current="page"] {
  background: rgba(46, 196, 182, 0.14);
  color: var(--teal-dark);
}

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(circle at 20% 20%, rgba(46,196,182,0.18), transparent 55%),
              linear-gradient(180deg, #EAF6F5 0%, var(--bg) 100%);
  padding: 64px 24px 56px;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.hero h1 { font-size: clamp(2rem, 4vw, 2.9rem); }
.hero p.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 46ch; }
.hero-badge {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--teal-dark);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.hero-art {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
  text-align: center;
  font-size: 5rem;
}
.hero-mascots {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
}
.hero-mascots img { width: 46%; max-width: 220px; height: auto; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }

@media (max-width: 800px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; padding: 20px; font-size: 3.5rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-family: var(--font-body);
  border-radius: 999px;
  padding: 12px 22px;
  text-decoration: none;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal); color: #fff; box-shadow: 0 6px 16px rgba(46,196,182,0.35); }
.btn-primary:hover { background: var(--teal-dark); }
.btn-outline { background: #fff; color: var(--navy); border: 2px solid var(--navy); }
.btn-amazon { background: var(--amazon); color: #14213D; box-shadow: 0 6px 16px rgba(255,153,0,0.35); }
.btn-amazon:hover { background: var(--amazon-dark); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* ---------- Section headers ---------- */
.section { padding: 56px 24px; }
.section.alt { background: #fff; }
.section-head {
  max-width: var(--max-width);
  margin: 0 auto 28px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head p { color: var(--ink-soft); margin: 6px 0 0; max-width: 60ch; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 800;
  font-size: 0.78rem;
  color: var(--teal-dark);
}

/* ---------- Family sites strip ---------- */
.family-strip {
  background: var(--navy);
  color: #fff;
  padding: 34px 24px;
}
.family-strip .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.family-strip h3 { color: #fff; margin: 0; font-size: 1.1rem; }
.family-links { display: flex; gap: 10px; flex-wrap: wrap; }
.family-links a {
  text-decoration: none;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
}
.family-links a:hover { background: rgba(255,255,255,0.2); }

/* ---------- Grids & Cards ---------- */
.grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 22px;
}

.grid-single {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

.card-media {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--teal), var(--navy));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 3rem; font-weight: 800;
  position: relative;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-badge {
  position: absolute; top: 10px; left: 10px;
  background: var(--coral); color: #fff;
  font-size: 0.72rem; font-weight: 800;
  padding: 4px 10px; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.03em;
}
.card-badge-external {
  left: auto; right: 10px;
  background: var(--navy);
}
.card-media .free-stamp {
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%) rotate(-6deg);
  width: 38%;
  min-width: 44px;
  max-width: 92px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  z-index: 3;
  filter: drop-shadow(0 3px 6px rgba(0,0,0,0.35));
  pointer-events: none;
}
.grid-tight .card-media .free-stamp { width: 46%; left: -10px; }
.card-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-body h3 { font-size: 1.08rem; margin: 0; }
.card-meta { font-size: 0.82rem; color: var(--ink-soft); }
.card-subtitle { font-size: 0.85rem; color: var(--ink-soft); font-style: italic; margin: -4px 0 0; }
.card-desc { font-size: 0.92rem; color: var(--ink-soft); flex: 1; }
.card-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.card-actions-top { margin-top: 0; margin-bottom: 4px; }
.stars { color: var(--amazon); font-size: 0.95rem; letter-spacing: 1px; }

/* ---------- Video grid ---------- */
.video-card .card-media { aspect-ratio: 16/9; background: #000; }
.video-card .card-media iframe { width: 100%; height: 100%; border: 0; }

/* Featured video: takes its own full-width row in the grid, so nothing
   shares its row and whatever comes next starts a fresh row. Capped and
   centered so it reads as one highlighted card, not a stretched-out one. */
.video-card-featured {
  grid-column: 1 / -1;
  max-width: 480px;
  width: 100%;
  margin: 0 auto;
}

/* ---------- Deals ---------- */
.deal-card .card-media { background: linear-gradient(135deg, var(--amazon), var(--coral)); }
.deal-card .card-media img {
  object-fit: contain;
  padding: 14px;
  background: #fff;
}
.deal-expiry {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--coral);
  background: rgba(255,107,107,0.12);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
}
.deal-evergreen {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--teal-dark);
  background: rgba(46,196,182,0.12);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
}

/* ---------- Contact ---------- */
.contact-box {
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px;
  text-align: center;
}

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--navy-light);
  color: rgba(255,255,255,0.85);
  padding: 40px 24px 26px;
  margin-top: 40px;
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
footer h4 { color: #fff; font-size: 0.95rem; }
footer a { text-decoration: none; color: rgba(255,255,255,0.8); }
footer a:hover { color: var(--teal); }
.footer-col { min-width: 180px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.social-row { display: flex; gap: 10px; margin-top: 8px; }
.social-row a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: flex; align-items: center; justify-content: center;
}
.social-row a:hover { background: var(--teal); color: var(--navy); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 26px auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 0.82rem;
  text-align: center;
  color: rgba(255,255,255,0.6);
}
.footer-bottom .disclosure { max-width: 780px; margin: 8px auto 0; }

/* ---------- Affiliate disclosure banner ---------- */
.disclosure-banner {
  background: #FFF6E5;
  border: 1px solid #F5D48A;
  color: #6B4A00;
  font-size: 0.85rem;
  padding: 10px 16px;
  text-align: center;
}
.disclosure-banner .wrap { max-width: var(--max-width); margin: 0 auto; }

/* ---------- Book series grid (compact, fits 9) ---------- */
.grid-tight {
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
}
.grid-tight .card-media { aspect-ratio: 5 / 8; font-size: 2.2rem; }
.grid-tight .card-body { padding: 12px 12px 14px; gap: 6px; }
.grid-tight .card-body h3 { font-size: 0.95rem; }
.grid-tight .card-desc { font-size: 0.82rem; }

/* ---------- Article / blog cards ---------- */
.article-card .card-media { background: linear-gradient(135deg, #6C63FF, var(--navy)); }

/* ---------- Full article page ---------- */
.article-hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 8px;
}
.article-hero .eyebrow { margin-bottom: 10px; }
.article-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.article-hero-image {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-top: 20px;
  display: block;
}
.article-meta {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin-top: 6px;
}
.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 24px 56px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink);
}
.article-body h2 {
  margin-top: 2em;
  font-size: 1.35rem;
}
.article-body p { margin: 0 0 1.2em; }
.article-body a { color: var(--teal-dark); text-decoration: underline; }
.article-body a:hover { color: var(--navy); }
.article-disclaimer {
  max-width: 760px;
  margin: 0 auto 56px;
  padding: 18px 24px;
}
.article-disclaimer .box {
  background: #FFF6E5;
  border: 1px solid #F5D48A;
  color: #6B4A00;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.9rem;
  line-height: 1.6;
}
.article-disclaimer .box strong { display: block; margin-bottom: 4px; }
.back-to-blog {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

/* ---------- Kindle plan cards ---------- */
.kindle-card .card-media { background: linear-gradient(135deg, #232F52, var(--navy)); font-size: 2.4rem; }
.kindle-card .card-media img {
  object-fit: contain;
  padding: 14px;
  background: #fff;
}

/* ---------- Sticky bottom promo bar ---------- */
body.has-sticky-bar { padding-bottom: 64px; }

.sticky-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 500;
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 12px;
  box-shadow: 0 -6px 20px rgba(20,33,61,0.25);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.sticky-bar-marquee {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  min-width: 0;
}
.sticky-bar-track {
  display: inline-flex;
  width: max-content;
  animation: sticky-marquee 22s linear infinite;
  font-weight: 700;
  font-size: 0.88rem;
}
.sticky-bar-track span { padding-right: 8px; }
@keyframes sticky-marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.sticky-bar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.sticky-bar-close {
  background: rgba(255,255,255,0.12);
  border: none;
  color: #fff;
  width: 30px; height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
}
.sticky-bar-close:hover { background: rgba(255,255,255,0.24); }

@media (max-width: 720px) {
  .sticky-bar { flex-wrap: wrap; }
  .sticky-bar-marquee { flex-basis: 100%; order: 1; }
  .sticky-bar-actions { order: 2; margin-left: auto; }
  body.has-sticky-bar { padding-bottom: 92px; }
}

@media (prefers-reduced-motion: reduce) {
  .sticky-bar-track { animation: none; }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.empty-state {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  padding: 40px;
  color: var(--ink-soft);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
}