:root {
  color-scheme: light;
  --navy: #17365d;
  --navy-deep: #0d2340;
  --gold: #b2863b;
  --ink: #273444;
  --paper: #fbfaf7;
  --mist: #eef3f7;
  --line: #d9e2e8;
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(178, 134, 59, .09) 0 1px, transparent 1px 72px),
    radial-gradient(circle at 84% 12%, rgba(178, 134, 59, .17), transparent 23rem),
    var(--navy-deep);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(100% - 32px, 760px);
  margin: 0 auto;
  padding: clamp(32px, 8vw, 76px) 0 24px;
}

.card {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 7vw, 60px);
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 4px;
  box-shadow: 0 26px 80px rgba(0, 0, 0, .32);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: var(--gold);
}

.eyebrow {
  color: var(--gold);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .18em;
}

h1 {
  max-width: 13ch;
  margin: 15px 0 16px;
  color: var(--navy);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.4rem, 7vw, 4.7rem);
  font-weight: 700;
  line-height: .98;
  letter-spacing: -.035em;
}

.bookline {
  max-width: 54ch;
  margin: 0 0 30px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  line-height: 1.55;
}

.download {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 17px 20px;
  color: #fff;
  background: var(--navy);
  border: 2px solid var(--navy);
  border-radius: 3px;
  box-shadow: 0 8px 18px rgba(23, 54, 93, .18);
  text-decoration: none;
  transition: transform .16s ease, background .16s ease, box-shadow .16s ease;
}

.download:hover,
.download:focus-visible {
  background: var(--navy-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(23, 54, 93, .25);
}

.download:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

.download-icon {
  display: grid;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--navy-deep);
  background: var(--gold);
  border-radius: 50%;
  font-size: 1.75rem;
  line-height: 1;
}

.download strong,
.download small { display: block; }

.download strong { font-size: 1rem; }
.download small { margin-top: 3px; opacity: .78; font-size: .78rem; }

.rule {
  width: 100%;
  height: 1px;
  margin: 34px 0 28px;
  background: linear-gradient(90deg, var(--gold), var(--line) 32%, var(--line));
}

h2 {
  margin: 0 0 15px;
  color: var(--navy);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

ol {
  margin: 0;
  padding-left: 1.4rem;
}

li {
  margin: 0 0 12px;
  padding-left: 6px;
  line-height: 1.5;
}

li::marker { color: var(--gold); font-weight: 800; }

.note {
  margin-top: 26px;
  padding: 16px 18px;
  background: var(--mist);
  border-left: 4px solid var(--gold);
  font-size: .86rem;
  line-height: 1.55;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 4px 0;
  color: rgba(255, 255, 255, .68);
  font-size: .7rem;
  line-height: 1.45;
}

@media (max-width: 600px) {
  .shell { width: min(100% - 20px, 760px); padding-top: 18px; }
  .card { padding: 28px 24px 30px; }
  h1 { font-size: clamp(2.25rem, 13vw, 3.4rem); }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .download { transition: none; }
}