* {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", Times, serif;
  line-height: 1.7;
  color: #1a1a1a;
  background: #f7f5f2;
}

a {
  color: #2c4a6e;
  text-decoration: underline;
}

a:hover {
  color: #1a334f;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #e0ddd8;
  padding: 0.85rem 1.25rem;
}

.site-header-inner {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-logo {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-weight: 650;
  font-size: 1.05rem;
  color: #1a1a1a;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.95rem;
}

.site-nav a {
  color: #333;
  text-decoration: none;
}

.site-nav a:hover {
  color: #2c4a6e;
  text-decoration: underline;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

h1 {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 1.85rem;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 1rem;
  color: #111;
}

h2 {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 1.25rem;
  line-height: 1.3;
  font-weight: 650;
  margin: 2rem 0 0.75rem;
  color: #1a1a1a;
}

h3 {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
  color: #222;
}

p {
  margin: 0 0 1rem;
}

ul, ol {
  margin: 0 0 1.25rem;
  padding-left: 1.35rem;
}

li {
  margin-bottom: 0.45rem;
}

.lead {
  font-size: 1.08rem;
  color: #333;
}

.book-card, .cta-box, .prompt-box, .step-box {
  background: #fff;
  border: 1px solid #e0ddd8;
  border-radius: 8px;
  padding: 1.15rem 1.25rem;
  margin: 1.25rem 0;
}

.book-card h2, .cta-box h2 {
  margin-top: 0;
}

.book-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-top: 0.75rem;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  background: #2c4a6e;
  color: #fff !important;
  text-decoration: none !important;
  padding: 0.55rem 1rem;
  border-radius: 6px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.95rem;
  font-weight: 560;
}

.btn:hover {
  background: #1a334f;
}

.article-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.article-list li {
  margin-bottom: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid #e8e5e0;
}

.article-list a {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-weight: 560;
  text-decoration: none;
  color: #2c4a6e;
}

.article-list a:hover {
  text-decoration: underline;
}

.article-list span {
  display: block;
  color: #555;
  font-size: 0.92rem;
  margin-top: 0.2rem;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-weight: 400;
}

.disclaimer {
  font-size: 0.85rem;
  color: #555;
  background: #efece7;
  border-radius: 6px;
  padding: 0.85rem 1rem;
  margin: 2rem 0 1rem;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.5;
}

.site-footer {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.85rem;
  color: #666;
}

.site-footer p {
  margin: 0 0 0.5rem;
}

.site-footer a {
  color: #666;
  text-decoration: underline;
}

.site-footer a:hover {
  color: #333;
}

.meta {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.88rem;
  color: #666;
  margin-bottom: 1.5rem;
}

@media (max-width: 520px) {
  html {
    font-size: 17px;
  }

  h1 {
    font-size: 1.55rem;
  }

  main {
    padding-top: 1.5rem;
  }
}

.hero-cover {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto 1.5rem;
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.book-cover {
  display: block;
  width: 140px;
  height: auto;
  float: left;
  margin: 0 1.1rem 0.75rem 0;
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}

.section-cover {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 1.5rem auto;
  border-radius: 6px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.1);
}

.book-card::after, .clearfix::after {
  content: "";
  display: table;
  clear: both;
}

@media (max-width: 520px) {
  .book-cover {
    float: none;
    margin: 0 auto 1rem;
  }
}

.faq {
  margin: 2rem 0 1.25rem;
}

.faq-item {
  background: #fff;
  border: 1px solid #e0ddd8;
  border-radius: 8px;
  padding: 1rem 1.15rem;
  margin: 0.85rem 0;
}

.faq-item h2 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
}

.faq-item p:last-child {
  margin-bottom: 0;
}

.related {
  margin: 2rem 0 1rem;
}

.related ul {
  list-style: none;
  padding: 0;
}

.related li {
  margin-bottom: 0.55rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid #e8e5e0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 0.95rem;
}

.related a {
  text-decoration: none;
  font-weight: 560;
}

.related a:hover {
  text-decoration: underline;
}

.gate {
  background: #fff;
  border: 1px solid #e0ddd8;
  border-radius: 8px;
  padding: 1.25rem 1.25rem 1.15rem;
  margin: 1.75rem 0 1.5rem;
}

.gate h2 {
  margin-top: 0;
}

.gate-form {
  margin-top: 0.75rem;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.gate-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 560;
  color: #333;
  margin-bottom: 0.35rem;
}

.gate-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: stretch;
}

.gate-row input[type="email"] {
  flex: 1 1 200px;
  min-width: 180px;
  font-size: 1rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid #c8c4bc;
  border-radius: 6px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #faf9f7;
  color: #1a1a1a;
}

.gate-row input[type="email"]:focus {
  outline: 2px solid #2c4a6e;
  outline-offset: 1px;
  border-color: #2c4a6e;
}

.gate-submit {
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
}

.gate-submit:disabled {
  opacity: 0.65;
  cursor: wait;
}

.gate-privacy {
  font-size: 0.82rem;
  color: #666;
  margin: 0.65rem 0 0;
  line-height: 1.45;
}

.gate-status {
  font-size: 0.92rem;
  margin: 0.75rem 0 0;
  line-height: 1.45;
}

.gate-ok {
  color: #1a4d2e;
}

.gate-err {
  color: #8a2b2b;
}

.gate-download {
  margin: 0.85rem 0 0;
}


.about {
  margin: 2rem 0 1.25rem;
  background: #fff;
  border: 1px solid #e0ddd8;
  border-radius: 8px;
  padding: 1.15rem 1.25rem;
}

.about h2 {
  margin: 0 0 0.55rem;
  font-size: 1.25rem;
}

.about p:last-child {
  margin-bottom: 0;
}