/* Claude Code for Clinicians — site theme
   Palette pulled from the cover art: midnight navy -> teal gradient. */

:root {
  --navy-dark: #0c1e3e;
  --navy: #0c4a6e;
  --blue: #0369a1;
  --sky: #38bdf8;
  --teal: #00897B;
  --teal-dark: #00695C;
  --ink: #1a1a1a;
  --paper: #ffffff;
  --paper-muted: #f8fafc;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Header ---------- */
.book-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: linear-gradient(120deg, var(--navy-dark), var(--navy));
  border-bottom: 3px solid var(--teal);
}
.book-brand {
  color: #fff !important;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.book-brand span { font-weight: 400; opacity: 0.85; }
.book-brand:hover { text-decoration: none; opacity: 0.9; }
.book-chapter-tag {
  color: #bae6fd;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1px solid rgba(186,230,253,0.4);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  white-space: nowrap;
}

/* ---------- Main content ---------- */
.book-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1rem;
}

.book-main h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--navy);
  border-bottom: 3px solid var(--sky);
  padding-bottom: 0.6rem;
  margin: 0 0 1.4rem;
}
.book-main h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2.2rem 0 0.8rem;
}
.book-main h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.6rem 0 0.6rem;
}
.book-main p, .book-main li { font-size: 1.03rem; }
.book-main ul, .book-main ol { padding-left: 1.4rem; }

.part-tag {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--teal-dark);
  background: #e6f4f1;
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 1rem;
}

/* ---------- Icon callouts (Tip / Remember / Warning / Technical) ---------- */
.book-main blockquote {
  border-left: 4px solid #999;
  background: var(--paper-muted);
  margin: 1.2rem 0;
  padding: 0.85rem 1.2rem;
  border-radius: 0 0.4rem 0.4rem 0;
  font-size: 0.98rem;
}
.book-main blockquote p { margin: 0; }
.book-main blockquote.tip      { border-left-color: #15803d; background: #f0fdf4; }
.book-main blockquote.remember { border-left-color: #1d4ed8; background: #eff6ff; }
.book-main blockquote.warning  { border-left-color: #b91c1c; background: #fef2f2; }
.book-main blockquote.tech     { border-left-color: #6b7280; background: #f3f4f6; }

/* ---------- Code ---------- */
.book-main code {
  font-family: "SFMono-Regular", Consolas, Menlo, Monaco, monospace;
  font-size: 0.9em;
  background: #f1f5f9;
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
  color: var(--navy);
}
.book-main pre {
  background: #0f172a;
  color: #e2e8f0;
  font-size: 0.85rem;
  padding: 1rem 1.2rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  line-height: 1.5;
}
.book-main pre code { background: transparent; color: inherit; padding: 0; }

/* ---------- Tables ---------- */
.book-main table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.2rem 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
.book-main th, .book-main td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}
.book-main th { background: var(--navy); color: #fff; }
.book-main tr:nth-child(even) td { background: var(--paper-muted); }

/* ---------- Figures ---------- */
.book-figure {
  margin: 1.6rem 0;
  text-align: center;
}
.book-figure img {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.4rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.book-figure figcaption {
  font-size: 0.85rem;
  color: #555;
  margin-top: 0.6rem;
  font-style: italic;
  text-align: left;
}

/* ---------- Pager (prev / TOC / next) ---------- */
.book-pager {
  max-width: 760px;
  margin: 2.5rem auto 0;
  padding: 1.2rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.92rem;
}
.book-pager a { font-weight: 600; }
.book-pager .toc {
  color: var(--teal-dark);
  border: 1px solid var(--teal);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  white-space: nowrap;
}
.book-pager .prev, .book-pager .next { flex: 1; }
.book-pager .next { text-align: right; }

.book-footer {
  text-align: center;
  font-size: 0.8rem;
  color: #888;
  padding: 1.5rem;
}

/* ---------- Homepage hero + TOC ---------- */
.hero {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  background: linear-gradient(155deg, var(--navy-dark) 0%, var(--navy) 45%, var(--blue) 75%, var(--sky) 100%);
  color: #fff;
}
.hero img.cover {
  width: 210px;
  border-radius: 0.5rem;
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  margin-bottom: 1.5rem;
}
.hero h1 { font-size: 1.9rem; font-weight: 800; margin: 0 0 0.5rem; }
.hero .tagline { max-width: 520px; margin: 0 auto; opacity: 0.92; line-height: 1.6; }
.hero .author { margin-top: 1.2rem; font-size: 0.95rem; opacity: 0.85; }
.hero .cta {
  display: inline-block;
  margin-top: 1.6rem;
  background: #fff;
  color: var(--navy);
  font-weight: 700;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
}
.hero .cta:hover { text-decoration: none; opacity: 0.9; }

.toc-page { max-width: 760px; margin: 0 auto; padding: 2.5rem 1.5rem 3rem; }
.toc-page .part-block { margin-bottom: 2rem; }
.toc-page .part-block h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal-dark);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}
.toc-page ul { list-style: none; padding: 0; margin: 0; }
.toc-page li { padding: 0.35rem 0; border-bottom: 1px dotted var(--border); }
.toc-page li a { color: var(--ink); font-weight: 500; }
.toc-page li a:hover { color: var(--blue); }