/* =========================================
   AI for Main Street — Shared Styles
   ========================================= */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background-color: #0a0a0a;
  color: #d4d4d4;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.container { max-width: 680px; margin: 0 auto; padding: 0 1.5rem; }
a { color: #8ab4f8; text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

/* ---- NAV ---- */
.site-nav {
  border-bottom: 1px solid #1a1a1a;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: #0a0a0a;
  z-index: 100;
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { color: #f0f0f0; font-weight: 700; font-size: 1rem; }
.nav-brand:hover { text-decoration: none; color: #fff; }
.nav-links { list-style: none; display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: #888; font-size: 0.9rem; }
.nav-links a:hover { color: #f0f0f0; text-decoration: none; }
.nav-cta {
  background: #f0f0f0; color: #0a0a0a !important;
  padding: 0.4rem 1rem; border-radius: 4px; font-weight: 600;
}
.nav-cta:hover { background: #d4d4d4 !important; text-decoration: none !important; }

/* ---- HERO (homepage) ---- */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  border-bottom: 1px solid #1a1a1a;
}
.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  color: #f0f0f0;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.hero .subtitle {
  font-size: 1.15rem;
  color: #999;
  margin-bottom: 1.5rem;
}
.hero .one-liner {
  font-size: 1.1rem;
  color: #b0b0b0;
  max-width: 500px;
  margin: 0 auto 2.5rem;
  font-style: italic;
}
.cta-button {
  display: inline-block;
  padding: 0.85rem 2rem;
  background-color: #f0f0f0;
  color: #0a0a0a;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transition: background-color 0.2s ease;
}
.cta-button:hover, .cta-button:focus {
  background-color: #d4d4d4;
  text-decoration: none;
}

/* ---- HOMEPAGE SECTIONS ---- */
.section-heading {
  font-size: 1.4rem;
  font-weight: 600;
  color: #e0e0e0;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}
.problem { padding: 4rem 0; border-bottom: 1px solid #1a1a1a; }
.problem-text { font-size: 1.15rem; color: #b0b0b0; line-height: 1.8; }
.learn { padding: 4rem 0; border-bottom: 1px solid #1a1a1a; }
.learn-list { list-style: none; padding: 0; }
.learn-list li {
  padding: 0.75rem 0;
  padding-left: 1.5rem;
  position: relative;
  font-size: 1.05rem;
  color: #c8c8c8;
  border-bottom: 1px solid #141414;
}
.learn-list li:last-child { border-bottom: none; }
.learn-list li::before { content: "—"; position: absolute; left: 0; color: #555; }
.chapter-ref { color: #666; font-size: 0.9rem; }
.author { padding: 4rem 0; border-bottom: 1px solid #1a1a1a; }
.author-content { display: flex; gap: 2rem; align-items: flex-start; }
.author-photo {
  flex-shrink: 0; width: 120px; height: 120px;
  border-radius: 6px; object-fit: cover;
  display: block;
}
.author-bio p { color: #b0b0b0; font-size: 1rem; margin-bottom: 0.75rem; }
.author-email a { color: #8ab4f8; font-size: 0.95rem; }
.signup { padding: 4rem 0; border-bottom: 1px solid #1a1a1a; }
.signup-subtext { color: #888; font-size: 0.95rem; margin-bottom: 2rem; }
.signup-form { max-width: 420px; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.9rem; color: #999; margin-bottom: 0.4rem; }
.form-group .optional { color: #555; font-size: 0.8rem; }
.form-group .required { color: #c0392b; }
.form-group input {
  width: 100%; padding: 0.75rem 1rem;
  background-color: #141414; border: 1px solid #2a2a2a;
  border-radius: 4px; color: #e0e0e0; font-size: 1rem;
  font-family: inherit; transition: border-color 0.2s ease;
}
.form-group input::placeholder { color: #555; }
.form-group input:focus { outline: none; border-color: #555; }
.submit-button {
  display: inline-block; padding: 0.8rem 2rem;
  background-color: #f0f0f0; color: #0a0a0a;
  font-size: 1rem; font-weight: 600; border: none;
  border-radius: 4px; cursor: pointer; font-family: inherit;
  transition: background-color 0.2s ease;
}
.submit-button:hover, .submit-button:focus { background-color: #d4d4d4; }

/* ---- HOMEPAGE GUIDES SECTION ---- */
.guides-section { padding: 4rem 0; border-bottom: 1px solid #1a1a1a; }
.section-subheading { color: #888; font-size: 0.9rem; margin-top: -0.75rem; margin-bottom: 1.75rem; }
.guide-list { list-style: none; padding: 0; }
.guide-list li { padding: 0.65rem 0; border-bottom: 1px solid #141414; }
.guide-list li:last-child { border-bottom: none; }
.guide-list a {
  color: #8ab4f8;
  font-size: 1rem;
  text-decoration: none;
}
.guide-list a:hover { text-decoration: underline; color: #aecfff; }
.see-all {
  display: inline-block; margin-top: 1.25rem;
  color: #8ab4f8; font-size: 0.9rem;
}
.see-all:hover { text-decoration: underline; }

/* ---- GUIDE PAGE ---- */
.guide-header { padding: 4rem 0 2rem; border-bottom: 1px solid #1a1a1a; }
.guide-header h1 {
  font-size: 2rem; font-weight: 700; color: #f0f0f0;
  letter-spacing: -0.02em; margin-bottom: 0.75rem;
}
.guide-meta { color: #555; font-size: 0.85rem; }
.guide-body { padding: 3rem 0; }
/* Suppress the redundant H1 that markdown renders from the # title line */
.guide-body > h1:first-child { display: none; }
.guide-body h2 {
  font-size: 1.3rem; font-weight: 600; color: #e0e0e0;
  margin: 2.5rem 0 1rem; letter-spacing: -0.01em;
}
.guide-body h3 { font-size: 1.1rem; font-weight: 600; color: #d0d0d0; margin: 2rem 0 0.75rem; }
.guide-body h4 { font-size: 1rem; font-weight: 600; color: #c0c0c0; margin: 1.5rem 0 0.5rem; }
.guide-body p { color: #b0b0b0; margin-bottom: 1.25rem; }
.guide-body ul, .guide-body ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.guide-body li { color: #b0b0b0; margin-bottom: 0.5rem; }
.guide-body strong { color: #d4d4d4; }
.guide-body a { color: #8ab4f8; }
.guide-body a:hover { text-decoration: underline; color: #aecfff; }
.guide-body blockquote {
  border-left: 3px solid #2a2a2a; padding-left: 1.25rem;
  margin: 1.5rem 0; color: #888; font-style: italic;
}
.guide-body hr { border: none; border-top: 1px solid #1a1a1a; margin: 2.5rem 0; }
.guide-cta {
  background: #111; border: 1px solid #222; border-radius: 6px;
  padding: 2rem; margin: 3rem 0; text-align: center;
}
.guide-cta p { color: #999; margin-bottom: 1rem; }
.guide-cta a {
  display: inline-block; padding: 0.75rem 1.75rem;
  background: #f0f0f0; color: #0a0a0a; font-weight: 600;
  border-radius: 4px; font-size: 0.95rem; text-decoration: none;
}
.guide-cta a:hover { background: #d4d4d4; }
.breadcrumb { color: #555; font-size: 0.85rem; margin-bottom: 1.5rem; }
.breadcrumb a { color: #666; }
.breadcrumb a:hover { color: #8ab4f8; }

/* ---- GUIDES INDEX ---- */
.guides-grid { display: flex; flex-direction: column; gap: 0; }
.guide-card { padding: 1.5rem 0; border-bottom: 1px solid #1a1a1a; }
.guide-card:last-child { border-bottom: none; }
.guide-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.4rem; }
.guide-card h3 a { color: #8ab4f8; text-decoration: none; }
.guide-card h3 a:hover { text-decoration: underline; color: #aecfff; }
.guide-card p { color: #777; font-size: 0.9rem; margin: 0; }
.page-header { padding: 4rem 0 2rem; border-bottom: 1px solid #1a1a1a; }
.page-header h1 { font-size: 2rem; font-weight: 700; color: #f0f0f0; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.page-header p { color: #888; }

/* ---- FOOTER ---- */
.site-footer { padding: 3rem 0; text-align: center; border-top: 1px solid #1a1a1a; margin-top: 4rem; }
.site-footer p { color: #555; font-size: 0.85rem; margin-bottom: 0.35rem; }
.site-footer a { color: #666; font-size: 0.85rem; }
.site-footer a:hover { color: #8ab4f8; }
.footer-links { display: flex; gap: 1.5rem; justify-content: center; margin-bottom: 1rem; }
.amazon-link { color: #666; font-size: 0.85rem; }
.amazon-link:hover { color: #8ab4f8; }

/* ---- RESPONSIVE ---- */
@media (max-width: 600px) {
  .nav-links { display: none; }
  .hero { padding: 4rem 0 3rem; }
  .hero h1 { font-size: 2rem; }
  .hero .subtitle { font-size: 1rem; }
  .hero .one-liner { font-size: 1rem; }
  .problem, .learn, .author, .signup { padding: 3rem 0; }
  .author-content { flex-direction: column; align-items: center; text-align: center; }
  .author-photo { width: 100px; height: 100px; }
  .signup-form { max-width: 100%; }
  .submit-button { width: 100%; }
  .guide-header h1 { font-size: 1.5rem; }
  .guide-body h2 { font-size: 1.15rem; }
}