:root { --ink: #111; --muted: #444; --brand: #1F3A68; --brand-2: #B3122E; --bg: #fff; --soft: #f3f5f9; --line: #c9d0dc; }
* { box-sizing: border-box; }
html { font-size: 131.25%; } /* 21px base: readers are 65+ */
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.6;
  font-family: Verdana, "DejaVu Sans", "Segoe UI", Arial, sans-serif; }
main, .top, .foot { max-width: 60rem; margin: 0 auto; padding: 0 1rem; }
h1 { font-size: 2rem; line-height: 1.25; margin: 1.2rem 0 .8rem; color: var(--brand); }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2rem 0 .7rem; color: var(--brand); }
h3 { font-size: 1.1rem; margin: 0 0 .4rem; }
a { color: var(--brand); text-underline-offset: .15em; }
a:focus-visible, .btn:focus-visible { outline: 4px solid var(--brand-2); outline-offset: 3px; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 1rem; top: 1rem; background: #fff; padding: .5rem; }
.top { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-items: center; justify-content: space-between; padding-top: .8rem; padding-bottom: .8rem; border-bottom: 3px solid var(--brand); max-width: none; }
.logo { font-weight: bold; font-size: 1.3rem; text-decoration: none; color: var(--brand); }
.langs { display: flex; gap: .4rem; flex-wrap: wrap; }
.langs a, .langs span { display: inline-block; min-height: 48px; padding: .45rem .8rem; border-radius: 8px; }
.langs span { background: var(--brand); color: #fff; }
.lead { font-size: 1.15rem; }
.hero { padding: 1rem 0; }
.sample { display: flex; gap: .3rem; margin: 1rem 0; }
.sample span { width: 3.2rem; height: 3.2rem; display: grid; place-items: center; border: 2px solid var(--ink); font-size: 2rem; font-weight: bold; }
.sample span:nth-child(-n+4) { border-color: var(--brand-2); }
.features { list-style: none; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.features li { background: var(--soft); border-radius: 12px; padding: 1rem 1.2rem; }
.features h2 { margin: 0 0 .3rem; font-size: 1.15rem; }
.features p { margin: 0; }
.books { list-style: none; padding: 0; display: grid; gap: 1.5rem; }
.book { display: flex; gap: 1.2rem; align-items: flex-start; border: 2px solid var(--line); border-radius: 12px; padding: 1rem; }
.book img { width: 9rem; height: auto; border: 1px solid var(--line); flex: none; }
.book p { margin: 0 0 .6rem; color: var(--muted); }
.btn { display: inline-block; min-height: 48px; padding: .6rem 1.1rem; margin: .3rem .4rem .3rem 0; border-radius: 10px;
  background: var(--brand); color: #fff; text-decoration: none; font-weight: bold; text-align: center; }
.btn.alt { background: #fff; color: var(--brand); border: 2px solid var(--brand); }
.btn:hover { filter: brightness(1.15); }
.soon { font-weight: bold; color: var(--ink) !important; }
.box { background: var(--soft); border-left: 6px solid var(--brand); padding: .5rem 1.2rem 1rem; margin: 2rem 0; border-radius: 8px; }
.box h2 { margin-top: .8rem; }
.bonus { display: flex; gap: 1.5rem; align-items: center; margin-top: 1rem; }
.bonus .cover { width: 9rem; height: auto; border: 1px solid var(--line); flex: none; }
.downloads { display: grid; gap: .6rem; margin: 1.5rem 0; }
.btn.big { display: block; font-size: 1.15rem; padding: 1rem 1.2rem; margin: 0; }
.downloads .btn.big + .btn.big { background: #fff; color: var(--brand); border: 3px solid var(--brand); }
.hint { margin: .4rem 0 0; }
.print ol { padding-left: 1.4rem; } .print li { margin: .4rem 0; }
.preview { display: block; width: 100%; max-width: 26rem; height: auto; border: 2px solid var(--line); margin: 1rem 0; }
.tags { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.tags li { background: var(--soft); border-radius: 8px; padding: .3rem .8rem; }
.text { max-width: 42rem; }
.muted { color: var(--muted); }
.foot { margin-top: 3rem; padding-top: 1rem; padding-bottom: 2rem; border-top: 2px solid var(--line); color: var(--muted); max-width: none; text-align: center; }
@media (max-width: 34rem) {
  html { font-size: 118.75%; } /* 19px on phones keeps long words on screen */
  h1 { font-size: 1.6rem; }
  .book, .bonus { flex-direction: column; }
  .book img { width: 11rem; }
  .bonus .cover { width: 8rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print { .top, .foot, .downloads, .langs { display: none; } }