/* ============================================================
   What Health Becomes — site styles
   Design tokens live at the top. Change them here, everywhere updates.
   ============================================================ */

:root {
  /* Light theme (default) */
  --paper:      #FBF9F5;
  --paper-2:    #F3EFE8;
  --ink:        #16181A;
  --ink-2:      #5C6066;
  --ink-3:      #8B8579;
  --rule:       #DDD8CE;

  /* The three clocks — the accent system IS the framework */
  --clock1:     #12564C;  /* lifetime  */
  --clock2:     #4A3D6B;  /* months    */
  --clock3:     #A8492A;  /* minutes   */
  --signal:     #B08428;

  --accent:     var(--clock1);

  /* Type */
  --display: 'Fraunces', Georgia, serif;
  --body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    'IBM Plex Mono', 'SF Mono', Menlo, monospace;

  /* Measure */
  --measure: 34rem;
  --wide:    58rem;
}

[data-theme="dark"] {
  --paper:      #141719;
  --paper-2:    #1E2225;
  --ink:        #EDEAE3;
  --ink-2:      #9A958A;
  --ink-3:      #6E6960;
  --rule:       #2C3033;
  --clock1:     #4FB3A0;
  --clock2:     #9B85C9;
  --clock3:     #D97B52;
  --signal:     #D4A94A;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ---------- Layout ---------- */
.shell { max-width: var(--wide); margin: 0 auto; padding: 0 32px; }
.measure { max-width: var(--measure); }

/* ---------- Nav ---------- */
.nav {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 22px 0 20px;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap; gap: 14px;
}
.nav-brand {
  font-family: var(--display);
  font-size: 19px; font-weight: 400; letter-spacing: -0.2px;
  color: var(--ink); text-decoration: none;
  font-variation-settings: 'opsz' 100;
}
.nav-brand em { font-style: italic; color: var(--accent); }
.nav-right { display: flex; gap: 24px; align-items: baseline; }
.nav-links { display: flex; gap: 24px; font-size: 13.5px; }
.nav-links a {
  color: var(--ink-2); text-decoration: none; padding-bottom: 3px;
  border-bottom: 1.5px solid transparent;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.on { color: var(--ink); border-bottom-color: var(--accent); }

.theme-toggle {
  background: none; border: 1px solid var(--rule); border-radius: 2px;
  color: var(--ink-2); font-family: var(--mono); font-size: 10px;
  letter-spacing: 1px; text-transform: uppercase;
  padding: 4px 9px; cursor: pointer; line-height: 1.4;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 8px; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 26px;
}
.hero-h {
  font-family: var(--display); font-weight: 300;
  font-size: clamp(28px, 3.8vw, 40px); line-height: 1.24;
  letter-spacing: -0.6px; max-width: 17ch;
  font-variation-settings: 'opsz' 100;
}
.hero-h em { font-style: italic; color: var(--accent); }
.hero-sub {
  font-size: 16.5px; line-height: 1.65; color: var(--ink-2);
  max-width: 52ch; margin-top: 24px; font-weight: 300;
}

/* ---------- The signature: clock spans ---------- */
.clockspan { margin-top: 44px; max-width: 660px; }
.cs-row {
  display: grid; grid-template-columns: 88px 1fr;
  align-items: center; gap: 16px; margin-bottom: 11px;
}
.cs-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-2); text-align: right;
}
.cs-track { height: 3px; background: var(--paper-2); position: relative; }
.cs-fill { position: absolute; left: 0; top: 0; height: 100%; }
.cs-caption {
  font-size: 12.5px; color: var(--ink-2); margin-top: 14px;
  padding-left: 104px; font-style: italic;
}
@media (max-width: 640px) {
  .cs-row { grid-template-columns: 62px 1fr; gap: 10px; }
  .cs-caption { padding-left: 0; }
}

/* ---------- Section rhythm ---------- */
.band { padding: 60px 0; border-top: 1px solid var(--rule); margin-top: 56px; }
.band-label {
  font-family: var(--mono); font-size: 11px; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 26px;
}

/* ---------- Essay list ---------- */
.entry { padding: 26px 0; border-bottom: 1px solid var(--rule); }
.entry:last-child { border-bottom: none; }
.entry-meta {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 9px;
}
.entry-title {
  font-family: var(--display); font-weight: 400; font-size: 24px;
  line-height: 1.28; letter-spacing: -0.4px; margin-bottom: 8px;
  font-variation-settings: 'opsz' 100;
}
.entry-title a { color: var(--ink); text-decoration: none; }
.entry-title a:hover { color: var(--accent); }
.entry-dek { font-size: 15px; color: var(--ink-2); max-width: 58ch; line-height: 1.6; }
.entry.pending .entry-title { color: var(--ink-3); }
.entry.pending .entry-meta { color: var(--ink-3); }

/* ---------- Article ---------- */
.article { padding: 56px 0 0; }
.article-head { max-width: var(--measure); margin-bottom: 44px; }
.article-title {
  font-family: var(--display); font-weight: 300;
  font-size: clamp(30px, 4.6vw, 44px); line-height: 1.16;
  letter-spacing: -1px; margin-bottom: 20px;
  font-variation-settings: 'opsz' 100;
}
.article-dek { font-size: 18px; line-height: 1.6; color: var(--ink-2); font-weight: 300; }
.article-meta {
  margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-3);
  display: flex; gap: 14px; flex-wrap: wrap;
}
.prose { max-width: var(--measure); }
.prose p { margin-bottom: 22px; font-size: 17.5px; line-height: 1.72; }
.prose h2 {
  font-family: var(--display); font-weight: 400; font-size: 26px;
  line-height: 1.3; letter-spacing: -0.4px; margin: 48px 0 18px;
  font-variation-settings: 'opsz' 100;
}
.prose a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--rule); }
.prose a:hover { border-bottom-color: var(--accent); }
.prose em { font-style: italic; }
.prose strong { font-weight: 500; }
.section-num {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--ink-3);
  margin: 52px 0 14px; padding-top: 20px; border-top: 1px solid var(--rule);
}
.pull {
  font-family: var(--display); font-weight: 300; font-size: 23px;
  line-height: 1.42; letter-spacing: -0.3px; color: var(--ink);
  margin: 38px 0; padding-left: 22px; border-left: 2px solid var(--accent);
  font-variation-settings: 'opsz' 100;
}
.note-inline {
  background: var(--paper-2); border-left: 2px solid var(--signal);
  padding: 16px 20px; margin: 30px 0; font-size: 14.5px;
  color: var(--ink-2); line-height: 1.6;
}

/* ---------- Sources ---------- */
.sources { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--rule); max-width: var(--measure); }
.sources h3 {
  font-family: var(--mono); font-size: 11px; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin-bottom: 16px;
}
.sources li { list-style: none; font-size: 14px; color: var(--ink-2); margin-bottom: 12px; line-height: 1.55; }
.sources a { color: var(--accent); text-decoration: none; }
.sources a:hover { text-decoration: underline; }

/* ---------- Concepts ---------- */
.concept-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.concept-cell { background: var(--paper); padding: 26px 24px; }
.concept-cell h3 { font-family: var(--display); font-weight: 400; font-size: 19px; letter-spacing: -0.3px; margin-bottom: 8px; font-variation-settings: 'opsz' 100; }
.concept-cell h3 a { color: var(--ink); text-decoration: none; }
.concept-cell h3 a:hover { color: var(--accent); }
.concept-cell p { font-size: 14px; color: var(--ink-2); line-height: 1.55; }
.concept-cell.pending h3 { color: var(--ink-3); }

.definition {
  border-left: 2px solid var(--accent); padding: 18px 0 18px 22px;
  margin: 0 0 32px; max-width: var(--measure);
}
.definition .dfn-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px;
}
.definition p {
  font-family: var(--display); font-weight: 300; font-size: 21px;
  line-height: 1.45; letter-spacing: -0.2px;
  font-variation-settings: 'opsz' 100;
}
.appears { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--rule); max-width: var(--measure); }
.appears h3 { font-family: var(--mono); font-size: 11px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin-bottom: 14px; }
.appears li { list-style: none; font-size: 14.5px; margin-bottom: 9px; }
.appears a { color: var(--accent); text-decoration: none; }
.appears a:hover { text-decoration: underline; }

/* ---------- Subscribe ---------- */
.subscribe { background: var(--paper-2); border: 1px solid var(--rule); padding: 34px 32px; margin-top: 56px; }
.subscribe h3 { font-family: var(--display); font-weight: 400; font-size: 21px; margin-bottom: 8px; font-variation-settings: 'opsz' 100; }
.subscribe p { font-size: 14.5px; color: var(--ink-2); max-width: 46ch; line-height: 1.6; margin-bottom: 18px; }
.btn {
  display: inline-block; background: var(--accent); color: var(--paper);
  font-family: var(--mono); font-size: 11px; letter-spacing: 1.2px;
  text-transform: uppercase; padding: 11px 20px; text-decoration: none;
  border-radius: 2px;
}
.btn:hover { opacity: 0.88; }

/* ---------- Footer ---------- */
.foot {
  margin-top: 72px; padding: 30px 0 60px; border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.9px;
  text-transform: uppercase; color: var(--ink-3);
}
.foot a { color: var(--ink-3); text-decoration: none; }
.foot a:hover { color: var(--ink-2); }
.disclaimer {
  font-family: var(--body); font-size: 12.5px; letter-spacing: 0;
  text-transform: none; color: var(--ink-3); max-width: 54ch;
  margin-top: 18px; line-height: 1.55; font-style: italic;
}

/* ---------- Utility ---------- */
.back-link {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--ink-3); text-decoration: none;
  display: inline-block; margin-top: 44px;
}
.back-link:hover { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 640px) {
  .shell { padding: 0 20px; }
  body { font-size: 16px; }
  .prose p { font-size: 16.5px; }
  .nav { padding: 16px 0 14px; }
  .nav-links { gap: 16px; font-size: 12.5px; }
  .hero { padding: 40px 0 8px; }
}