@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,700;0,900;1,700&family=DM+Sans:wght@400;500&family=JetBrains+Mono:wght@400&display=swap');

/* ── PTH Site Design Tokens (from shared.css) ─────────── */
:root {
  --navy-dark: #0a1428;
  --navy-mid:  #101e3a;
  --royal:     #1a3a8a;
  --royal-light:#2a5acd;
  --orange:    #E87722;
  --charcoal:  #1C1C1E;
  --text-body: #444;
  --grey-light:#F0F2F5;
  --grey-mid:  #D1D5DB;
  --white:     #FFFFFF;
}

/* ── PTH Site Nav ─────────────────────────────────────── */
.pth-site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9999;
  height: 44px;
  background: var(--navy-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  box-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.pth-brand {
  font-family: 'Playfair Display', serif !important;
  font-weight: 900 !important;
  font-size: 1.05rem !important;
  color: var(--white) !important;
  text-decoration: none !important;
  letter-spacing: -0.02em;
}

.pth-hex {
  color: var(--orange);
}

.pth-nav-links {
  display: flex;
  gap: 2rem;
}

.pth-nav-links a {
  color: rgba(255,255,255,0.65) !important;
  text-decoration: none !important;
  font-family: 'DM Sans', sans-serif !important;
  font-size: 0.82rem !important;
  font-weight: 500 !important;
  letter-spacing: 0.04em;
  transition: color 0.3s;
  border-bottom: none !important;
}

.pth-nav-links a:hover {
  color: var(--white) !important;
}

/* ── Push GitBook below nav ───────────────────────────── */
.book {
  padding-top: 44px !important;
}

.book-summary {
  top: 44px !important;
  height: calc(100% - 44px) !important;
}

/* ── White background — matches site ─────────────────── */
.page-wrapper,
.page-inner,
.book-body {
  background: var(--white) !important;
}

/* ── Constrain reading width — matches article-body ──── */
.page-inner section {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  padding: 3rem 2rem 5rem;
}

/* ── Headings — Playfair Display ──────────────────────── */
.page-inner h1,
.page-inner h2,
.page-inner h3,
.page-inner h4 {
  font-family: 'Playfair Display', serif;
  font-weight: 900;
  color: var(--charcoal);
  line-height: 1.2;
}

.page-inner h1 { font-size: 36px !important; margin-bottom: 0.5em; }
.page-inner h2 { font-size: 28px !important; margin-top: 2.5rem; margin-bottom: 0.75rem; }
.page-inner h3 { font-size: 22px !important; margin-top: 2rem;   margin-bottom: 0.6rem; }

/* ── Body text — DM Sans, explicit px to beat GitBook ─── */
.page-inner p,
.page-inner li {
  font-family: 'DM Sans', sans-serif !important;
  font-size: 18px !important;
  line-height: 1.85 !important;
  color: var(--text-body) !important;
  margin-bottom: 1.5rem;
}

/* ── Links ────────────────────────────────────────────── */
.page-inner a:not(.anchor-section) {
  color: var(--royal-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.3s;
}

.page-inner a:not(.anchor-section):hover {
  color: var(--orange);
}

/* ── Blockquotes ──────────────────────────────────────── */
.page-inner blockquote {
  border-left: 3px solid var(--royal) !important;
  background: var(--grey-light) !important;
  padding: 1rem 1.5rem;
  border-radius: 0 8px 8px 0;
  margin: 2rem 0;
}

.page-inner blockquote p {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 1.05rem;
  color: #555;
  margin-bottom: 0;
}

/* ── Code ─────────────────────────────────────────────── */
.page-inner code {
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.9em;
  background: var(--grey-light);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  color: var(--royal);
}

/* ── Tables ───────────────────────────────────────────── */
.page-inner table th {
  background: var(--navy-dark) !important;
  color: var(--white) !important;
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
}

.page-inner table tr:nth-child(even) td {
  background: var(--grey-light);
}

/* ── Dividers ─────────────────────────────────────────── */
.page-inner hr {
  border: none;
  height: 1px;
  background: var(--grey-mid);
  margin: 3rem 0;
}

/* ── Mobile ───────────────────────────────────────────── */
@media (max-width: 768px) {

  /* Sidebar: always hidden on mobile, slides in as overlay */
  .book-summary,
  .book.with-summary .book-summary {
    position: fixed !important;
    top: 44px !important;
    left: 0 !important;
    width: 85vw !important;
    max-width: 320px !important;
    height: calc(100% - 44px) !important;
    transform: translateX(-110%) !important;
    transition: transform 0.28s ease !important;
    z-index: 1000 !important;
    box-shadow: none !important;
    overflow-y: auto !important;
  }

  /* Only open when mobile.js adds this class */
  .book.mobile-sidebar-open .book-summary {
    transform: translateX(0) !important;
    box-shadow: 4px 0 24px rgba(0,0,0,0.18) !important;
  }

  /* Content always full width */
  .book-body {
    position: relative !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    margin-left: 0 !important;
    width: 100% !important;
  }

  /* Dimmed backdrop — only when sidebar is open */
  .book.mobile-sidebar-open::after {
    content: '';
    display: block;
    position: fixed;
    inset: 44px 0 0 0;
    background: rgba(10,20,40,0.45);
    z-index: 999;
  }

  /* Content section padding */
  .page-inner section {
    padding: 1.5rem 1rem 4rem !important;
    max-width: 100% !important;
  }

  /* Slightly smaller text on mobile */
  .page-inner p,
  .page-inner li {
    font-size: 16px !important;
    line-height: 1.75 !important;
  }

  .page-inner h1 { font-size: 28px !important; }
  .page-inner h2 { font-size: 22px !important; }
  .page-inner h3 { font-size: 18px !important; }

  /* Nav: tighter spacing */
  .pth-site-nav {
    padding: 0 1rem !important;
  }

  .pth-nav-links {
    gap: 1.25rem !important;
  }

  /* Hide the empty GitBook book-header on mobile */
  .book-header {
    display: none !important;
  }

  /* Sub-nav bar sits directly below the PTH nav */
  #pth-menu-btn {
    display: flex !important;
    align-items: center !important;
    gap: 7px !important;
    position: fixed !important;
    top: 44px !important;
    left: 0 !important;
    right: 0 !important;
    height: 36px !important;
    padding: 0 16px !important;
    background: var(--navy-mid) !important;
    color: rgba(255,255,255,0.8) !important;
    font-family: 'DM Sans', sans-serif !important;
    font-size: 13px !important;
    font-weight: 500 !important;
    letter-spacing: 0.03em !important;
    border: none !important;
    border-bottom: 1px solid rgba(255,255,255,0.08) !important;
    cursor: pointer !important;
    z-index: 9998 !important;
    white-space: nowrap !important;
    width: 100% !important;
  }

  #pth-menu-btn:active {
    color: var(--orange) !important;
  }

  /* Push book content below both nav bars */
  .book {
    padding-top: 80px !important;
  }

  .book-summary {
    top: 80px !important;
    height: calc(100% - 80px) !important;
  }

  /* Tables: allow horizontal scroll */
  .page-inner table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}