/* Foundations of Longevity, web guide. The Brown Gene. */
@import url("fonts/fonts.css");

:root {
  --ink: #1C1917;
  --ink-2: #292524;
  --cream: #FAFAF9;
  --paper: #FFFFFF;
  --terracotta: #C2410C;
  --terracotta-tint: #FBECE4;
  --amber: #FB923C;
  --sage: #4D7C6F;
  --sage-tint: #EEF3F1;
  --stone: #78716C;
  --stone-2: #A8A29E;
  --fog: #D6D3D1;
  --mist: #F5F5F4;
  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, monospace;
  --sidebar: 288px;
  --measure: 700px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: lining-nums proportional-nums;
}
a { color: inherit; }
img, svg { max-width: 100%; height: auto; }

/* ---------- Progress bar ---------- */
.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--terracotta); z-index: 60; transition: width 80ms linear;
}

/* ---------- Layout ---------- */
.shell { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }

.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--cream); border-right: 1px solid var(--fog);
  padding: 28px 22px 32px 26px;
  scrollbar-width: thin;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-bottom: 26px; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand .t { font-family: var(--display); font-weight: 600; font-size: 15px; line-height: 1.15; }
.brand .s { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--stone); display: block; margin-top: 3px; }

.search { position: relative; margin-bottom: 22px; }
.search input {
  width: 100%; font: 14px var(--body); padding: 9px 12px 9px 34px;
  border: 1px solid var(--fog); border-radius: 8px; background: var(--paper); color: var(--ink); outline: none;
}
.search input:focus { border-color: var(--terracotta); }
.search svg { position: absolute; left: 11px; top: 11px; width: 15px; height: 15px; color: var(--stone); }
.search-results { position: absolute; left: 0; right: 0; top: 44px; background: var(--paper); border: 1px solid var(--fog); border-radius: 10px; z-index: 50; max-height: 340px; overflow-y: auto; display: none; }
.search-results.open { display: block; }
.search-results a { display: block; padding: 10px 12px; text-decoration: none; border-bottom: 1px solid var(--mist); font-size: 13.5px; line-height: 1.4; }
.search-results a:hover { background: var(--mist); }
.search-results .c { font-family: var(--mono); font-size: 10px; color: var(--terracotta); letter-spacing: .08em; text-transform: uppercase; display: block; margin-bottom: 2px; }
.search-results .x { color: var(--stone); font-size: 12.5px; display: block; margin-top: 2px; }
.search-results .none { padding: 12px; font-size: 13px; color: var(--stone); }

.toc { list-style: none; margin: 0; padding: 0; }
.toc > li { margin: 0; }
.toc .ch {
  display: grid; grid-template-columns: 30px 1fr auto; align-items: baseline; gap: 8px;
  padding: 7px 8px 7px 6px; margin-left: -6px; border-radius: 8px;
  text-decoration: none; font-size: 14.5px; line-height: 1.3; color: var(--ink);
}
.toc .ch:hover { background: rgba(28,25,23,.05); }
.toc .ch .n { font-family: var(--mono); font-size: 11px; color: var(--stone); }
.toc .ch .done { width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid var(--fog); display: inline-block; align-self: center; }
.toc .ch .done.on { background: var(--sage); border-color: var(--sage); }
.toc > li.current > .ch { background: var(--paper); font-weight: 600; box-shadow: inset 0 0 0 1px var(--fog); }
.toc > li.current > .ch .n { color: var(--terracotta); }
.toc .lock { font-family: var(--mono); font-size: 10px; color: var(--stone-2); letter-spacing: .06em; }
.toc .secs { list-style: none; margin: 4px 0 8px 0; padding: 0 0 0 30px; border-left: 0; }
.toc .secs a {
  display: block; padding: 4px 8px 4px 10px; font-size: 13px; line-height: 1.35; color: var(--stone);
  text-decoration: none; border-left: 2px solid var(--fog); margin-left: 1px;
}
.toc .secs a:hover { color: var(--ink); }
.toc .secs a.active { color: var(--terracotta); border-left-color: var(--terracotta); font-weight: 500; }
.sidebar .foot { margin-top: 28px; font-family: var(--mono); font-size: 10.5px; color: var(--stone); letter-spacing: .04em; line-height: 1.6; }

/* ---------- Top bar (mobile) ---------- */
.topbar { display: none; }

/* ---------- Main ---------- */
.main { min-width: 0; }
.page { max-width: var(--measure); margin: 0 auto; padding: 56px 32px 80px 32px; }

.chapter-head { margin-bottom: 40px; }
.chapter-head .kicker { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--terracotta); margin: 0 0 14px 0; display: flex; gap: 14px; align-items: center; }
.chapter-head .kicker .num { font-family: var(--display); font-weight: 700; font-size: 44px; line-height: 1; letter-spacing: -.04em; color: var(--terracotta); }
.chapter-head h1 { font-family: var(--display); font-weight: 600; font-size: 42px; line-height: 1.08; letter-spacing: -.025em; margin: 0 0 16px 0; }
.chapter-head .deck { font-size: 19px; line-height: 1.5; color: var(--stone); margin: 0 0 20px 0; }
.chapter-head .meta { font-family: var(--mono); font-size: 11.5px; color: var(--stone); letter-spacing: .04em; display: flex; gap: 18px; flex-wrap: wrap; }
.chapter-head .rule { width: 48px; height: 4px; background: var(--terracotta); margin: 22px 0 0 0; }

/* ---------- Prose ---------- */
.prose p { margin: 0 0 1.15em 0; }
.prose strong { font-weight: 600; }
.prose h2 {
  font-family: var(--display); font-weight: 600; font-size: 28px; line-height: 1.2; letter-spacing: -.02em;
  margin: 2.4em 0 .7em 0; padding-top: .9em; border-top: 2px solid var(--terracotta); scroll-margin-top: 24px;
}
.prose h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.prose h3 { font-family: var(--display); font-weight: 600; font-size: 20px; margin: 1.8em 0 .5em 0; }
.prose p.lead { font-size: 20px; line-height: 1.5; }
.prose p.runin > strong:first-child { font-family: var(--display); color: var(--terracotta); padding-right: 2px; }
.prose a { color: var(--terracotta); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1.2em 0; }
.prose li { margin-bottom: .45em; }
.prose ul li::marker { color: var(--terracotta); }
.prose hr { border: 0; border-top: 1px solid var(--fog); margin: 2em 0; }

sup.cite { font-family: var(--mono); font-size: 10.5px; color: var(--stone); line-height: 0; vertical-align: super; }
sup.cite a { color: var(--stone); text-decoration: none; }

.callout {
  margin: 1.8em 0; padding: 4px 0 4px 22px; border-left: 4px solid var(--terracotta);
  font-family: var(--display); font-weight: 500; font-size: 24px; line-height: 1.3; letter-spacing: -.012em;
}
.plain {
  margin: 1.4em 0 1.6em 0; padding: 16px 20px; background: var(--sage-tint); border-radius: 10px; font-size: 16.5px;
}
.plain > strong:first-child { font-family: var(--display); color: var(--sage); }
.aside-note {
  margin: 1.4em 0; padding: 16px 20px; background: var(--mist); border-radius: 10px; font-size: 15.5px; color: var(--ink-2);
}

/* Stat tiles */
.stat {
  display: grid; grid-template-columns: 150px 1fr; gap: 0 24px; align-items: start;
  padding: 20px 0; border-top: 1px solid var(--fog); margin: 0;
}
.stat + .stat { border-top: 1px solid var(--fog); }
.stat + :not(.stat) { margin-top: 1.4em; }
.stat .n { font-family: var(--display); font-weight: 700; font-size: 44px; line-height: 1; letter-spacing: -.035em; color: var(--terracotta); padding-top: 4px; }
.stat .n.long { font-size: 30px; padding-top: 10px; }
.stat .t { margin: 0; font-size: 16px; line-height: 1.6; }
.stat-end { border-bottom: 1px solid var(--fog); margin-bottom: 1.6em; }

/* Figures */
figure.chart { margin: 2em 0 2.2em 0; padding: 0; }
figure.chart svg { width: 100%; height: auto; display: block; }
figure.chart figcaption { font-family: var(--body); font-size: 12.5px; color: var(--stone-2); margin-top: 10px; line-height: 1.45; }
figure.illus { margin: 2em 0; padding: 22px 22px 16px; background: var(--mist); border-radius: 12px; }
figure.illus svg { display: block; width: 100%; height: auto; }
figure.illus figcaption { font-family: var(--body); font-size: 12.5px; color: var(--stone-2); margin-top: 12px; line-height: 1.45; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.6em 0 2em 0; -webkit-overflow-scrolling: touch; }
.prose table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.45; min-width: 520px; }
.prose thead th {
  font-family: var(--display); font-weight: 600; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--stone);
  text-align: left; padding: 0 14px 10px 0; border-bottom: 2px solid var(--terracotta); vertical-align: bottom;
}
.prose tbody td { padding: 11px 14px 11px 0; border-bottom: 1px solid var(--fog); vertical-align: top; }
.prose tbody td:first-child { font-weight: 600; }
.prose table.targets td:nth-child(3) { color: var(--sage); font-weight: 600; }

/* Blockquote (GP script etc) */
.prose blockquote {
  margin: 1.6em 0; padding: 20px 24px; background: var(--terracotta-tint); border-radius: 12px; font-size: 16.5px;
  border-left: 4px solid var(--terracotta);
}
.prose blockquote p:last-child { margin-bottom: 0; }

/* Checklist */
.prose ul.check { list-style: none; padding-left: 0; }
.prose ul.check li { display: grid; grid-template-columns: 22px 1fr; gap: 12px; align-items: start; padding: 8px 0; border-bottom: 1px solid var(--mist); }
.prose ul.check input { width: 18px; height: 18px; margin-top: 4px; accent-color: var(--sage); }
.prose ul.check li.on { color: var(--stone); text-decoration: line-through; }

/* Summary panel */
.summary { margin: 3.5em 0 2.5em 0; padding: 32px 32px 24px; background: var(--cream); border: 1px solid var(--fog); border-radius: 16px; }
.summary .label { font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--sage); margin-bottom: 8px; }
.summary h2 { border: 0; padding: 0; margin: 0 0 20px 0; font-size: 30px; }
.summary .block { background: var(--paper); border-left: 4px solid var(--sage); padding: 16px 20px; border-radius: 0 10px 10px 0; margin-bottom: 12px; }
.summary .block p { margin: 0 0 8px 0; font-size: 16px; }
.summary .block p:last-child { margin-bottom: 0; }
.summary .block p > strong:first-child { font-family: var(--display); color: var(--sage); }
.summary .block.first p { font-family: var(--display); font-size: 22px; line-height: 1.35; font-weight: 500; }
.summary .block.first p > strong:first-child { display: block; font: 500 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 6px; }
.summary ul { margin: 6px 0 0 0; padding-left: 1.2em; }
.summary li { font-size: 15.5px; margin-bottom: 6px; }

/* References */
.refs { margin-top: 3em; padding-top: 1.5em; border-top: 1px solid var(--fog); }
.refs h2 { border: 0; padding: 0; font-size: 20px; margin: 0 0 14px 0; }
.refs ol { list-style: none; padding: 0; margin: 0; counter-reset: ref; font-size: 13px; line-height: 1.5; color: var(--stone); columns: 2; column-gap: 28px; }
.refs li { counter-increment: ref; break-inside: avoid; padding-left: 30px; position: relative; margin-bottom: 6px; scroll-margin-top: 24px; }
.refs li::before { content: counter(ref); position: absolute; left: 0; font-family: var(--mono); color: var(--terracotta); font-size: 12px; }
.refs a { color: var(--ink); text-decoration: none; }
.refs a:hover { text-decoration: underline; }
details.refs-wrap summary { cursor: pointer; font-family: var(--display); font-weight: 600; font-size: 18px; list-style: none; display: flex; align-items: center; gap: 10px; }
details.refs-wrap summary::-webkit-details-marker { display: none; }
details.refs-wrap summary .chev { width: 18px; height: 18px; transition: transform .2s; }
details.refs-wrap[open] summary .chev { transform: rotate(90deg); }
details.refs-wrap summary .count { font-family: var(--mono); font-size: 12px; color: var(--stone); font-weight: 400; }

/* Prev / next */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--fog); }
.pager a { display: block; text-decoration: none; padding: 18px 20px; border: 1px solid var(--fog); border-radius: 12px; transition: border-color .15s; }
.pager a:hover { border-color: var(--terracotta); }
.pager a.next { text-align: right; }
.pager .l { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--stone); display: block; margin-bottom: 6px; }
.pager .t { font-family: var(--display); font-weight: 600; font-size: 17px; }
.pager .done-btn { grid-column: 1 / -1; }
.mark-done { font: 500 14px var(--body); padding: 12px 18px; border-radius: 10px; border: 1px solid var(--sage); background: var(--sage-tint); color: var(--sage); cursor: pointer; width: 100%; }
.mark-done.on { background: var(--sage); color: #fff; }

/* Landing / intro extras */
.hero { padding: 72px 0 36px; }
.hero .eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--terracotta); margin-bottom: 18px; }
.hero h1 { font-family: var(--display); font-weight: 600; font-size: 54px; line-height: 1.02; letter-spacing: -.03em; margin: 0 0 20px; }
.hero p { font-size: 20px; color: var(--stone); max-width: 560px; }
.hero .cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn { display: inline-block; font: 600 15px var(--body); padding: 13px 20px; border-radius: 10px; text-decoration: none; }
.btn.primary { background: var(--terracotta); color: #fff; }
.btn.ghost { border: 1px solid var(--fog); color: var(--ink); }
.chapter-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 36px 0 12px; }
.chapter-grid a { text-decoration: none; padding: 18px 18px 16px; border: 1px solid var(--fog); border-radius: 12px; display: block; }
.chapter-grid a:hover { border-color: var(--terracotta); }
.chapter-grid .n { font-family: var(--mono); font-size: 11px; color: var(--terracotta); letter-spacing: .1em; }
.chapter-grid .t { font-family: var(--display); font-weight: 600; font-size: 17px; margin: 6px 0 4px; }
.chapter-grid .d { font-size: 13.5px; color: var(--stone); line-height: 1.45; }

/* Footer */
.site-foot { max-width: var(--measure); margin: 0 auto; padding: 0 32px 48px; font-family: var(--mono); font-size: 11.5px; color: var(--stone); letter-spacing: .03em; line-height: 1.7; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: 0; left: 0; width: min(86vw, 340px); height: 100vh; z-index: 80;
    transform: translateX(-104%); transition: transform .22s ease; padding-top: 24px;
  }
  body.nav-open .sidebar { transform: translateX(0); box-shadow: 0 0 0 100vw rgba(28,25,23,.35); }
  .topbar {
    display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 40;
    background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--fog); padding: 10px 16px; gap: 12px;
  }
  .topbar .brand { margin: 0; }
  .topbar .brand img { width: 28px; height: 28px; }
  .topbar .brand .t { font-size: 13.5px; }
  @media (max-width: 480px) { .topbar .here { display: none; } .topbar .brand .t { font-size: 13px; } }
  @media (max-width: 360px) { .topbar .brand .t { display: none; } }
  .topbar .brand .s { display: none; }
  .topbar .brand .t { white-space: nowrap; }
  .topbar .here { white-space: nowrap; }
  .topbar .brand { min-width: 0; }
  .topbar .menu { font: 500 13px var(--body); padding: 8px 12px; border: 1px solid var(--fog); border-radius: 8px; background: var(--paper); color: var(--ink); -webkit-appearance: none; appearance: none; display: flex; align-items: center; gap: 8px; cursor: pointer; }
  .topbar .here { font-family: var(--mono); font-size: 11px; color: var(--stone); letter-spacing: .06em; text-transform: uppercase; }
  .page { padding: 36px 20px 64px; }
  body { font-size: 16px; line-height: 1.58; }
  .chapter-head h1 { font-size: 34px; }
  .chapter-head .kicker .num { font-size: 36px; }
  .prose h2 { font-size: 24px; }
  .callout { font-size: 21px; }
  .stat { grid-template-columns: 110px 1fr; gap: 0 16px; }
  .stat .n { font-size: 34px; }
  .stat .n.long { font-size: 22px; padding-top: 8px; }
  .summary { padding: 22px 18px 14px; }
  .summary h2 { font-size: 25px; }
  .refs ol { columns: 1; }
  .pager { grid-template-columns: 1fr; }
  .pager a.next { text-align: left; }
  .hero h1 { font-size: 38px; }
  .chapter-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .page { padding: 28px 16px 56px; }
  .stat { grid-template-columns: 1fr; gap: 6px; }
  .stat .n { padding-top: 0; }
}

/* ---------- Week tracker (Chapter 8) ---------- */
.print-only { display: none; }
.tracker { margin: 1.4em 0 2em; }
.tracker-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13.5px; color: var(--stone); margin-bottom: 12px; }
.tracker-tools { display: flex; gap: 8px; }
.tbtn { font: 500 12.5px var(--body); padding: 7px 11px; border: 1px solid var(--fog); border-radius: 8px; background: var(--paper); color: var(--ink); cursor: pointer; }
.tbtn:hover { border-color: var(--terracotta); }
details.week { border: 1px solid var(--fog); border-radius: 12px; margin-bottom: 8px; background: var(--paper); }
details.week summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 1fr auto 18px; align-items: center; gap: 12px; padding: 12px 16px; }
details.week summary::-webkit-details-marker { display: none; }
details.week .wk { font-family: var(--display); font-weight: 600; font-size: 16px; }
details.week .score { font-family: var(--mono); font-size: 12px; color: var(--stone); }
details.week .score.full { color: var(--sage); }
details.week .chev { width: 18px; height: 18px; color: var(--stone); transition: transform .2s; }
details.week[open] .chev { transform: rotate(90deg); }
details.week .items { padding: 4px 16px 14px; border-top: 1px solid var(--mist); }
.ti { display: grid; grid-template-columns: 1fr auto 48px; align-items: center; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--mist); font-size: 15px; }
.ti:last-child { border-bottom: 0; }
.ti.note { grid-template-columns: 1fr; gap: 2px; }
.ti.note .tv { font-family: var(--mono); font-size: 12.5px; color: var(--terracotta); }
.ti .tl { color: var(--ink-2); }
.ti .tc { font-family: var(--mono); font-size: 12px; color: var(--stone); text-align: right; }
.ti .tc.on { color: var(--sage); }
.dots { display: flex; gap: 5px; }
.dot { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--fog); background: var(--paper); padding: 0; cursor: pointer; }
.dot.on { background: var(--sage); border-color: var(--sage); }
.ti input[type=text] { grid-column: 2 / -1; width: 190px; font: 14px var(--body); padding: 6px 10px; border: 1px solid var(--fog); border-radius: 8px; }
@media (max-width: 480px) { .ti { grid-template-columns: 1fr auto; } .ti .tc { grid-column: 1 / -1; text-align: left; } .ti input[type=text] { width: 100%; grid-column: 1 / -1; } }
@media print {
  .sidebar, .topbar, .progress, .tracker, .pager, .site-foot, .search { display: none !important; }
  .shell { display: block; }
  .print-only { display: block; }
  .page { max-width: none; padding: 0; }
  .prose table { font-size: 11px; min-width: 0; }
}

/* ---------- Unlock page ---------- */
.toc .lock { width: 12px; height: 12px; margin-left: 6px; vertical-align: -1px; color: var(--stone-2); }
.unlock-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 0 0 20px; }
.ubox { border: 1px solid var(--fog); border-radius: 14px; padding: 22px 22px 18px; }
.ubox.buy { background: var(--cream); }
.ubox h3 { margin: 0 0 8px; }
.ubox .small { font-size: 14px; color: var(--stone); line-height: 1.5; }
.ubox .mono { font-family: var(--mono); font-size: 12px; }
.unlock-form { display: grid; gap: 10px; margin: 12px 0 8px; }
.unlock-form input { font: 15px var(--mono); padding: 12px 14px; border: 1px solid var(--fog); border-radius: 10px; width: 100%; }
.unlock-form input:focus { outline: none; border-color: var(--terracotta); }
.unlock-form .btn { border: 0; cursor: pointer; width: 100%; text-align: center; }
.error { color: var(--terracotta); font-size: 14px; min-height: 1em; margin: 0 0 6px; }
.price { font-family: var(--display); font-weight: 700; font-size: 34px; letter-spacing: -.03em; margin: 4px 0 6px; }
.ubox.buy .btn { display: block; text-align: center; margin: 8px 0 12px; }
@media (max-width: 760px) { .unlock-grid { grid-template-columns: 1fr; } }

/* --- site additions --- */
.ubox h2.ubox-h { font-family: var(--display); font-weight: 600; font-size: 20px; margin: 0 0 8px; border: 0; padding: 0; }
.table-wrap.scrolls { -webkit-mask-image: linear-gradient(to right, #000 82%, transparent); mask-image: linear-gradient(to right, #000 82%, transparent); }
.table-wrap.scrolls.at-end { -webkit-mask-image: none; mask-image: none; }
.scroll-hint { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--stone); margin: -1.4em 0 1.8em; }
.site-foot a { display: inline-block; padding: 4px 2px; }