/* CCM landing page. The palette matches ccm-book.css and follows the same rule: light by
   default; dark when the reader picks it (stored by the book's theme toggle), or when the
   system prefers it and the reader has not picked light. */

:root {
  color-scheme: light;
  --paper: #fffdfb;
  --surface: #ffffff;
  --soft: #f8f4f9;
  --ink: #241d2b;
  --muted: #6a6072;
  --line: #ebe3ee;
  --line-strong: #d6c9dc;
  --purple: #7341aa;
  --purple-hover: #5b3189;
  --pink: #b8457d;
  --on-purple: #ffffff;
  --glow: #f3e6f3;
  --code-bg: #241d2b;
  --code-ink: #efe6f6;
  --shadow: 0 10px 28px rgb(64 36 90 / 0.14);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #16121b;
  --surface: #1c1722;
  --soft: #1c1722;
  --ink: #ece6f1;
  --muted: #a59bb0;
  --line: #2e2636;
  --line-strong: #463b51;
  --purple: #c5a6f2;
  --purple-hover: #dcc6fb;
  --pink: #f08cbc;
  --on-purple: #16121b;
  --glow: #2a2034;
  --code-bg: #0f0c13;
  --code-ink: #e7dff0;
  --shadow: 0 10px 28px rgb(0 0 0 / 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #16121b;
    --surface: #1c1722;
    --soft: #1c1722;
    --ink: #ece6f1;
    --muted: #a59bb0;
    --line: #2e2636;
    --line-strong: #463b51;
    --purple: #c5a6f2;
    --purple-hover: #dcc6fb;
    --pink: #f08cbc;
    --on-purple: #16121b;
    --glow: #2a2034;
    --code-bg: #0f0c13;
    --code-ink: #e7dff0;
    --shadow: 0 10px 28px rgb(0 0 0 / 0.45);
  }
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--purple); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--purple-hover); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--purple); outline-offset: 4px; }
p { margin: 0 0 18px; }
.landing :is(section > p, p.lead, .lead > p, .pillar > p, .split-copy > p, .book-copy > p) {
  hyphens: auto; -webkit-hyphens: auto; hyphenate-limit-chars: 6 3 3;
  text-align: justify; text-justify: inter-word;
  text-wrap: pretty; overflow-wrap: break-word;
}
.landing :is(h1, h2, h3, .rubric, .eyebrow, .hero-note, .art-caption, figcaption) {
  hyphens: none; text-wrap: balance; text-align: left;
}
.landing .art-caption { text-align: center; }
@media (max-width: 700px) {
  .landing :is(section > p, p.lead, .lead > p, .pillar > p, .split-copy > p, .book-copy > p) {
    text-align: left;
  }
}
.landing :is(code, pre, kbd, samp) { hyphens: none; text-wrap: wrap; }
.gd-typeset-line { display: block; white-space: nowrap; text-wrap: nowrap; }
.gd-typeset-line:not(:last-child) { text-align: justify; text-align-last: justify; }
.gd-typeset-line[data-hyphen]::after { content: "\2010"; }
.gd-line-space { font-size: 0; }
.landing p[data-layout="knuth-plass"] { hyphens: none; text-align: left; }
.headerlink { display: none; }
.skip {
  position: absolute; left: 20px; top: -100px; z-index: 5;
  padding: 10px; background: var(--surface); color: var(--ink);
}
.skip:focus { top: 12px; }

/* Header */
.site-header, .site-footer, main { max-width: 1200px; margin: auto; }
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 14px 32px; border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.brand span { font-size: 15px; font-weight: 720; letter-spacing: -0.01em; }
nav { display: flex; gap: 26px; align-items: center; }
nav a { font-size: 14px; font-weight: 600; text-decoration: none; }
.nav-pdf { border: 1px solid var(--line-strong); border-radius: 24px; padding: 8px 16px; }
.theme-toggle {
  display: grid; place-items: center; width: 34px; height: 34px; padding: 0;
  border: 1px solid var(--line-strong); border-radius: 50%;
  background: transparent; color: var(--ink); cursor: pointer; font-size: 16px;
}
.theme-toggle:hover { background: var(--soft); }

/* Hero */
main { padding: 0 32px; }
.landing > section > h1:first-child, .landing > h1:first-child { display: none; }
h1, h2, .rubric { letter-spacing: -0.04em; line-height: 1.12; }
h2 { font-size: 38px; margin-top: 65px; }
.hero {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px;
  align-items: center; padding: 76px 0 58px;
}
.eyebrow {
  font-size: 11px; font-weight: 750; letter-spacing: 0.17em;
  color: var(--pink); margin-bottom: 22px;
}
.hero h1 { font-size: clamp(42px, 5.3vw, 67px); font-weight: 760; margin: 0 0 28px; }
.hero em { font-style: normal; color: var(--purple); }
.lead { font-size: 19px; line-height: 1.7; color: var(--muted); max-width: 550px; }
.actions { display: flex; gap: 13px; flex-wrap: wrap; margin: 28px 0 21px; }
.actions p { display: contents; }
.actions a {
  padding: 12px 20px; border: 1px solid var(--line-strong); border-radius: 8px;
  text-decoration: none; font-size: 14px; font-weight: 650;
  background: var(--surface); color: var(--ink);
}
.actions a:first-child {
  background: var(--purple); color: var(--on-purple);
  border-color: var(--purple); box-shadow: var(--shadow);
}
.actions a:first-child:hover { background: var(--purple-hover); }
.hero-note { font-size: 12px; color: var(--muted); }
.hero-art {
  position: relative; text-align: center; padding: 42px 0 15px; border-radius: 50%;
  background: radial-gradient(ellipse, var(--glow) 0%, transparent 70%);
}
.hero-art img { display: block; width: 70%; max-width: 300px; margin: 0 auto; }
.art-caption { font-size: 10px; letter-spacing: 0.28em; color: var(--muted); margin-top: 8px; }

/* Sections */
.pillars {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  margin: 15px 0 80px;
}
.pillar { padding: 30px 28px 25px 0; }
.pillar + .pillar { padding-left: 28px; border-left: 1px solid var(--line); }
.pillar .rubric {
  font-size: 12px; font-weight: 700; letter-spacing: 0.02em;
  color: var(--pink); line-height: 1.6; margin-bottom: 14px;
}
.pillar p { font-size: 15px; color: var(--muted); line-height: 1.8; }
.section-heading { max-width: 770px; margin: 20px 0 25px; }
.section-heading .rubric, .split-copy .rubric, .book-copy .rubric {
  font-size: 38px; font-weight: 730; margin: 0 0 25px;
}
.section-heading .eyebrow { margin-bottom: 15px; }
.landing > section > p { color: var(--muted); max-width: 850px; }
figure { margin: 35px 0 65px; }
figure img {
  width: 100%; max-height: 710px; object-fit: contain;
  border: 1px solid var(--line); border-radius: 12px;
}
figcaption { font-size: 13px; color: var(--muted); margin: 10px 0 0; }
figcaption p { margin: 0; }
.split-section {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 45px;
  align-items: center; margin: 65px 0 95px;
}
.split-section img { width: 100%; }
.split-copy p { color: var(--muted); font-size: 15px; }
.book-section {
  display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 80px; align-items: center;
  background: var(--soft); border: 1px solid var(--line); border-radius: 22px;
  padding: 50px 58px; margin: 75px 0 90px;
}
.book-section > img {
  width: 100%; max-width: 315px; transform: rotate(-3deg); box-shadow: var(--shadow);
}
.book-copy p { color: var(--muted); font-size: 15px; }
.text-links { display: flex; gap: 22px; flex-wrap: wrap; margin: 25px 0 70px; }
.text-links p { display: contents; }
.text-links a { font-size: 14px; }
pre {
  background: var(--code-bg); color: var(--code-ink); padding: 27px 30px;
  border-radius: 12px; overflow: auto; font: 14px/1.9 "DejaVu Sans Mono", monospace;
}

/* Footer */
.site-footer {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 35px; padding: 45px 32px;
  margin-top: 70px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted);
}
.site-footer strong { font-size: 20px; color: var(--purple); }
.site-footer a { display: block; margin-bottom: 6px; }

@media (max-width: 800px) {
  .site-header { padding: 10px 20px; }
  .brand span { display: none; }
  nav { gap: 14px; }
  nav a { font-size: 12px; }
  nav a:nth-child(2) { display: none; }
  main { padding: 0 20px; }
  .hero { grid-template-columns: 1fr; padding-top: 45px; gap: 0; }
  .hero h1 { font-size: 44px; }
  .hero-art { max-width: 360px; margin: 0 auto; }
  .pillars { grid-template-columns: 1fr; margin-bottom: 50px; }
  .pillar, .pillar + .pillar { padding: 22px 0; border-left: 0; }
  .pillar + .pillar { border-top: 1px solid var(--line); }
  .split-section { grid-template-columns: 1fr; gap: 20px; }
  .book-section { grid-template-columns: 1fr; gap: 40px; padding: 30px; }
  .book-section > img { max-width: 230px; margin: auto; }
  .section-heading .rubric, .split-copy .rubric, .book-copy .rubric { font-size: 31px; }
  .site-footer { grid-template-columns: 1fr 1fr; padding: 35px 20px; }
  .site-footer > p { grid-column: 1 / -1; }
  .lead { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .site-header nav, .theme-toggle, .skip { display: none; }
  body { background: #fff; color: #000; }
}