:root {
  --blue: #486ACB; --blue-dark: #3453A8; --blue-soft: #EEF3FD; --ink: #121417; --muted: #5B6472;
  --bg: #FFFFFF; --soft: #F6F8FD; --line: #E3E8F2; --radius: 16px;
  --shadow: 0 10px 30px rgba(18, 36, 90, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Nunito", -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; font-weight: 600; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-dark); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5rem; font-weight: 900; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: .95rem; }

/* header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 64px; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--ink); font-weight: 900; font-size: 1.15rem; }
.site-header nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.site-header nav a { text-decoration: none; color: var(--ink); font-weight: 700; font-size: .95rem; }
.site-header nav a:hover { color: var(--blue); }

/* hero */
.hero { background: linear-gradient(180deg, var(--blue-soft), #fff); padding: 3rem 0 2.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 2rem; align-items: center; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 34rem; }
.fan { display: flex; justify-content: center; align-items: flex-end; padding: 1rem 0; }
.fan img { width: 38%; border-radius: 10px; box-shadow: var(--shadow); margin: 0 -6%; transform: rotate(-8deg); }
.fan img:nth-child(2) { transform: translateY(-14px); z-index: 2; width: 44%; }
.fan img:nth-child(3) { transform: rotate(8deg); }

/* strip */
.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--soft); }
.strip ul { list-style: none; margin: 0; padding: .8rem 0; display: flex; flex-wrap: wrap; gap: .5rem 2rem; justify-content: center; font-size: .95rem; color: var(--muted); }
.strip li::before { content: "✦ "; color: var(--blue); }

/* sections */
.section-title { margin-top: 2.5rem; }
.section-sub { color: var(--muted); max-width: 44rem; margin-bottom: 1.5rem; }
.series { margin: 1.5rem 0 2.5rem; }
.series-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: .3rem 1.5rem; margin-bottom: 1rem; }
.series-head p { color: var(--muted); margin: 0; max-width: 40rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem; }
.soft { background: var(--soft); padding: .5rem 0 2.5rem; margin-top: 2rem; }
.two-col { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; }
.coming { background: var(--blue-soft); border-radius: var(--radius); padding: .25rem 1.5rem 1.5rem; align-self: start; margin-top: 2.5rem; }
.coming .section-title { margin-top: 1.25rem; }
.contact { text-align: center; padding-bottom: 1rem; }
.contact a { font-weight: 800; }

/* cards */
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: transform .15s, box-shadow .15s; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.cover { display: block; background: var(--soft); padding: 1.25rem 1.25rem 0; }
.cover img { margin: 0 auto; width: 78%; border-radius: 6px 6px 0 0; box-shadow: 0 -6px 18px rgba(18,36,90,.12); }
.card-body { padding: 1rem 1.25rem 1.25rem; display: flex; flex-direction: column; gap: .25rem; flex: 1; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; color: var(--blue); font-weight: 800; margin: 0; }
.card h3 a { text-decoration: none; color: var(--ink); }
.card h3 a:hover { color: var(--blue); }
.tagline { color: var(--muted); margin: 0 0 .75rem; flex: 1; }

/* buttons */
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; }
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .6rem 1.1rem; border-radius: 999px; border: 2px solid var(--blue); color: var(--blue-dark); font-weight: 800; text-decoration: none; white-space: nowrap; background: #fff; }
.btn.primary { background: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn.big { padding: .8rem 1.5rem; font-size: 1.05rem; }
.btn.soon { background: #fff; color: var(--muted); border-color: var(--line); cursor: default; }
.price { background: rgba(255,255,255,.22); padding: .1rem .5rem; border-radius: 999px; font-size: .85em; }
.free { font-weight: 800; font-size: .95rem; }

/* free list */
.free-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .6rem; }
.free-list a { display: flex; align-items: center; gap: .6rem; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: .7rem .9rem; text-decoration: none; color: var(--ink); font-weight: 700; }
.free-list a:hover { border-color: var(--blue); color: var(--blue-dark); }
.dot { width: 14px; height: 14px; border-radius: 50%; border: 1px solid rgba(0,0,0,.08); flex: none; }

/* book page */
.crumbs { margin: 1.25rem 0; color: var(--muted); font-size: .9rem; }
.crumbs a { text-decoration: none; }
.book-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 2.5rem; align-items: start; }
.book-cover img { border-radius: 10px; box-shadow: var(--shadow); }
.subtitle { font-size: 1.15rem; color: var(--muted); }
.bullets { padding-left: 1.2rem; margin: 0 0 1.25rem; }
.bullets li { margin-bottom: .25rem; }
.description { max-width: 46rem; margin: 2.5rem 0 1rem; font-size: 1.05rem; }
.description ul { padding-left: 1.2rem; }
.samples { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.samples img { border: 1px solid var(--line); border-radius: 10px; width: 100%; }

/* footer */
.site-footer { margin-top: 3rem; border-top: 1px solid var(--line); padding: 2rem 0 2.5rem; text-align: center; color: var(--muted); font-size: .9rem; }
.footer-logo { margin: 0 auto 1rem; width: 140px; }

@media (max-width: 760px) {
  .hero { padding: 2rem 0 1.5rem; }
  .hero-grid, .two-col, .book-grid { grid-template-columns: 1fr; }
  .fan { padding-top: 1.5rem; }
  .book-cover { max-width: 340px; margin: 0 auto; }
  .samples { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .site-header nav { gap: .8rem; }
  .site-header nav a { font-size: .85rem; }
  .coming { margin-top: 0; }
}
@media (max-width: 480px) {
  .bar { min-height: 56px; }
  .brand { gap: .45rem; }
  .brand img { width: 36px; height: 36px; }
  .brand span { font-size: .95rem; white-space: nowrap; }
  .site-header nav { gap: .7rem; flex-wrap: nowrap; }
  .site-header nav a { font-size: .85rem; }
  .site-header nav a:nth-child(2), .site-header nav a:nth-child(3) { display: none; }
}