:root {
  --cream: #F4F1EB;
  --navy: #1E3A5F;
  --taupe: #D4A574;
  --muted: #8B8378;
  --rule: #E5DFD3;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--navy);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 500;
  color: var(--navy);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Hero ---------------------------------------------- */

.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.tagline {
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 56px;
  font-style: italic;
}

.book-block {
  display: grid;
  grid-template-columns: minmax(180px, 220px) 1fr;
  gap: 40px;
  align-items: start;
}

.book-cover {
  width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 20px 40px -16px rgba(30, 58, 95, 0.25), 0 8px 16px -8px rgba(30, 58, 95, 0.15);
}

.book-title {
  font-size: 32px;
  margin: 0 0 6px;
  line-height: 1.15;
}

.book-subtitle {
  font-family: 'Newsreader', Georgia, serif;
  font-style: italic;
  font-size: 18px;
  color: var(--navy);
  margin: 0 0 4px;
}

.book-author {
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 20px;
}

.book-blurb {
  margin: 0 0 24px;
  font-size: 16px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 120ms ease, color 120ms ease;
  border: 1px solid var(--navy);
}

.btn-primary {
  background: var(--navy);
  color: var(--cream);
}

.btn-primary:hover {
  background: #14283f;
}

.btn-secondary {
  background: transparent;
  color: var(--navy);
}

.btn-secondary:hover {
  background: var(--taupe);
  color: var(--cream);
  border-color: var(--taupe);
}

/* Section common ---------------------------------------------- */

main section {
  padding: 64px 0;
  border-bottom: 1px solid var(--rule);
}

section h2 {
  font-size: 26px;
  margin: 0 0 24px;
}

section p {
  margin: 0 0 16px;
}

.section-lede {
  font-size: 17px;
  color: var(--navy);
}

/* Printables ---------------------------------------------- */

.printable-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  border-top: 1px solid var(--rule);
}

.printable-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
}

.signup-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.signup-form input[type="email"] {
  flex: 1 1 240px;
  padding: 12px 14px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: white;
  font-family: inherit;
  font-size: 15px;
  color: var(--navy);
}

.signup-form input[type="email"]:focus {
  outline: none;
  border-color: var(--navy);
}

.signup-form button {
  padding: 12px 20px;
  border-radius: 4px;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--cream);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 120ms ease;
}

.signup-form button:hover {
  background: #14283f;
}

.form-note {
  font-size: 14px;
  margin: 8px 0 0;
  min-height: 1.2em;
}

.form-note.pending { color: var(--muted); }
.form-note.success { color: var(--navy); }
.form-note.error { color: #B23A48; }

.fine-print {
  color: var(--muted);
  font-size: 14px;
  margin-top: 8px;
}

/* Footer ---------------------------------------------- */

footer {
  padding: 40px 0 56px;
}

footer p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 4px;
}

footer a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

footer a:hover {
  border-color: var(--navy);
}

.privacy {
  margin-top: 12px;
  font-style: italic;
}

/* Mobile ---------------------------------------------- */

@media (max-width: 640px) {
  .hero { padding: 48px 0 40px; }
  .book-block {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: left;
  }
  .book-cover {
    max-width: 220px;
  }
  .book-title { font-size: 26px; }
  main section { padding: 48px 0; }
  section h2 { font-size: 22px; }
}