/* The Peptide Gut — site styles v5 ("Rx Chain")
   Layout: full-width ruled bands; huge condensed headlines; evidence shown as pharmacy-style labels and colored beads.
   Light = Rx Chain (white). Dark = Night Label (black). */
:root {
  --paper: #ffffff;
  --ink: #0d0d0f;
  --muted: #55585f;
  --hair: #e2e3e7;
  --soft: #f4f5f7;
  --blue: #2747ff;
  --on-blue: #ffffff;
  --human: #00a36b;
  --animal: #ff8a00;
  --lab: #2747ff;
  --review: #7d828c;
  --company: #ff3b5c;
  --slot: #2747ff;
  --font-head: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --font-body: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --measure: 66ch;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0b0b0d; --ink: #f5f5f2; --muted: #a3a6ad; --hair: #26272c; --soft: #16161a;
    --blue: #5b74ff; --on-blue: #0b0b0d; --lab: #5b74ff; --review: #9aa0aa; --slot: #8b9bff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0b0b0d; --ink: #f5f5f2; --muted: #a3a6ad; --hair: #26272c; --soft: #16161a;
  --blue: #5b74ff; --on-blue: #0b0b0d; --lab: #5b74ff; --review: #9aa0aa; --slot: #8b9bff;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.6 var(--font-body); }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
a:hover { color: var(--blue); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
img, svg { max-width: 100%; }

.wrap { max-width: 76rem; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.measure > * { max-width: var(--measure); }
.mono { font-family: var(--font-mono); }

/* draft bar */
.draft-bar { background: var(--ink); color: var(--paper); font: 500 0.75rem/1.4 var(--font-mono); letter-spacing: 0.03em; }
.draft-bar .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.5rem 1rem; padding-block: 0.5rem; }
.draft-bar button { font: inherit; background: transparent; color: inherit; border: 1px solid currentColor; border-radius: 3px; padding: 0.3rem 0.6rem; cursor: pointer; }

/* header */
.site-header .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.75rem 2rem; padding-block: 1.1rem; }
.site-header { border-bottom: 3px solid var(--ink); }
.logo { display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; font: 800 1.35rem/1 var(--font-head); text-transform: uppercase; letter-spacing: 0.02em; }
.logo svg { width: 48px; height: 16px; flex: none; }
.nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.nav a { text-decoration: none; font: 700 0.8125rem/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.05em; padding-block: 0.4rem; border-bottom: 2px solid transparent; }
.nav a[aria-current="page"] { border-bottom-color: var(--blue); }

/* headings */
h1, h2, h3, h4 { margin: 0; font-family: var(--font-head); text-transform: uppercase; line-height: 0.9; letter-spacing: 0; text-wrap: balance; }
.display { font-weight: 900; font-size: clamp(3.4rem, 12vw, 9.5rem); line-height: 0.84; }
.hl { background: var(--blue); color: var(--on-blue); padding: 0 0.06em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.page-title { font-weight: 900; font-size: clamp(3rem, 9vw, 6.5rem); line-height: 0.86; }
h2 { font-weight: 800; font-size: clamp(2rem, 4.6vw, 3.4rem); }
h3 { font-weight: 800; font-size: clamp(1.5rem, 2.6vw, 1.9rem); }
.kicker { display: block; font: 700 0.75rem/1.3 var(--font-mono); letter-spacing: 0.07em; text-transform: uppercase; color: var(--blue); margin-bottom: 0.9rem; }
.lede { font-size: 1.2rem; line-height: 1.5; color: var(--muted); max-width: 52ch; margin: 1.25rem 0 0; }

/* bands */
.band { padding-block: clamp(2.75rem, 6vw, 5rem); border-bottom: 3px solid var(--ink); }
.band.tight { padding-block: clamp(2rem, 4vw, 3rem); }
.band.soft { background: var(--soft); }

/* hero */
.hero { padding-block: clamp(2.25rem, 5vw, 3.75rem) 0; }
.bead-strip { display: block; width: 100%; height: auto; margin-block: clamp(1.5rem, 3vw, 2.25rem) 0.25rem; }
.hero-row { display: grid; grid-template-columns: 1fr minmax(0, 26rem); gap: 1.5rem 3rem; align-items: end; padding-block: 1.5rem clamp(2.5rem, 5vw, 3.5rem); }
.hero-row > * { min-width: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.btn { display: inline-flex; align-items: center; font: 800 0.875rem/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.05em; text-decoration: none; padding: 1rem 1.25rem; background: var(--ink); color: var(--paper); border: 2px solid var(--ink); }
.btn:hover { background: var(--blue); border-color: var(--blue); color: var(--on-blue); }
.btn.ghost { background: transparent; color: var(--ink); }

/* Rx label */
.rx { border: 2px solid var(--ink); font: 500 0.8125rem/1.35 var(--font-mono); background: var(--paper); }
.rx-top { display: flex; justify-content: space-between; gap: 1rem; background: var(--ink); color: var(--paper); padding: 0.5rem 0.7rem; font-weight: 700; letter-spacing: 0.06em; }
.rx-body { padding: 0.6rem 0.7rem; display: grid; gap: 0.3rem; }
.rx-line { display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-bottom: 1px dotted var(--ink); padding-bottom: 0.3rem; }
.rx-line:last-child { border-bottom: 0; padding-bottom: 0; }
.rx-line b { display: inline-flex; align-items: center; gap: 0.45rem; text-align: right; }
.rx-note { font-size: 0.75rem; color: var(--muted); margin-top: 0.5rem; font-family: var(--font-mono); }

/* beads, pills, meter */
.dot { width: 0.75rem; height: 0.75rem; border-radius: 50%; display: inline-block; flex: none; }
.pill { display: inline-flex; align-items: center; font: 700 0.6875rem/1 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; padding: 0.4rem 0.6rem; border-radius: 999px; color: #fff; white-space: nowrap; }
.c-human { --c: var(--human); } .c-animal { --c: var(--animal); } .c-lab { --c: var(--lab); } .c-review { --c: var(--review); } .c-company { --c: var(--company); }
.pill, .dot { background: var(--c, var(--ink)); }
.status { display: inline-flex; font: 700 0.6875rem/1 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; padding: 0.35rem 0.55rem; border: 1.5px solid var(--ink); white-space: nowrap; }
.meter { display: grid; gap: 0.45rem; font: 700 0.75rem/1 var(--font-mono); }
.meter-row { display: grid; grid-template-columns: 5.5rem 1fr auto; gap: 0.75rem; align-items: center; }
.beads { display: flex; gap: 4px; flex-wrap: wrap; }
.beads i { width: 12px; height: 12px; border-radius: 50%; background: var(--c); display: inline-block; }
.beads i.off { opacity: 0.16; }

/* legend (labels explained) */
.legend { border-top: 3px solid var(--ink); margin-top: 2rem; }
.legend-row { display: grid; grid-template-columns: 15rem 1fr; gap: 0.75rem 2rem; padding-block: 1.25rem; border-bottom: 1px solid var(--ink); align-items: start; }
.legend-row > * { min-width: 0; }
.legend-row p { margin: 0; max-width: 60ch; }
.legend-row h3 { display: flex; align-items: center; gap: 0.6rem; font-size: 1.5rem; }
.legend-row h3 .dot { width: 1rem; height: 1rem; }

/* three-up columns with rules */
.cols { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 3px solid var(--ink); margin-top: 2rem; }
.cols > * { padding: 1.5rem 1.5rem 1.75rem 0; border-right: 1px solid var(--ink); min-width: 0; display: grid; gap: 0.75rem; align-content: start; }
.cols > * + * { padding-left: 1.5rem; }
.cols > *:last-child { border-right: 0; padding-right: 0; }
.cols p { margin: 0; color: var(--muted); }
.cols .tag { font: 700 0.75rem/1 var(--font-mono); letter-spacing: 0.06em; color: var(--blue); text-transform: uppercase; }
.cols a.more { font: 800 0.8125rem/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.05em; }

/* article blocks */
.article-head { display: grid; grid-template-columns: 1fr minmax(0, 24rem); gap: 1.5rem 3rem; align-items: end; }
.article-head > * { min-width: 0; }
.parts { list-style: none; margin: 2rem 0 0; padding: 0; counter-reset: part; border-top: 3px solid var(--ink); }
.parts > li { counter-increment: part; display: grid; grid-template-columns: 4rem 1fr; gap: 1rem; padding-block: 1.5rem; border-bottom: 1px solid var(--ink); }
.parts > li::before { content: counter(part, decimal-leading-zero); font: 900 2.25rem/0.9 var(--font-head); color: var(--blue); }
.parts > li > div { min-width: 0; display: grid; gap: 0.75rem; }
.claim { display: grid; grid-template-columns: 6.5rem 1fr; gap: 0.75rem; align-items: start; padding-block: 0.6rem; border-top: 1px dotted var(--ink); }
.claim > * { min-width: 0; }
.byline { font: 500 0.8125rem/1.5 var(--font-mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; margin-top: 1.25rem; }
.byline span { display: inline-flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

/* news / literacy cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); gap: 0; border-top: 3px solid var(--ink); margin-top: 2rem; }
.card { padding: 1.5rem 1.5rem 1.75rem 0; border-bottom: 1px solid var(--ink); display: grid; gap: 0.8rem; align-content: start; min-width: 0; }
.card + .card { padding-left: 1.5rem; border-left: 1px solid var(--ink); }
.card .labels { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.card .meta { font: 500 0.75rem/1.4 var(--font-mono); color: var(--muted); }

/* prose lists */
.rules { list-style: none; padding: 0; margin: 2rem 0 0; border-top: 3px solid var(--ink); max-width: none; }
.rules li { padding-block: 1rem; border-bottom: 1px solid var(--ink); display: grid; grid-template-columns: 2rem 1fr; gap: 0.75rem; }
.rules li::before { content: "Rx"; font: 700 0.75rem/1.9 var(--font-mono); color: var(--blue); }
.rules li > span { min-width: 0; max-width: var(--measure); }
.steps { list-style: none; padding: 0; margin: 2rem 0 0; counter-reset: s; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 3px solid var(--ink); }
.steps li { counter-increment: s; padding: 1.25rem 1rem 1.5rem 0; border-right: 1px solid var(--ink); min-width: 0; }
.steps li + li { padding-left: 1rem; }
.steps li:last-child { border-right: 0; }
.steps li::before { content: counter(s, decimal-leading-zero); display: block; font: 900 2.25rem/1 var(--font-head); color: var(--blue); margin-bottom: 0.5rem; }
.steps strong { display: block; font: 800 1.15rem/1.05 var(--font-head); text-transform: uppercase; margin-bottom: 0.35rem; }
.steps span { color: var(--muted); font-size: 0.9375rem; }

/* table */
.table-scroll { overflow-x: auto; margin-top: 1.5rem; }
table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: 0.9375rem; border-top: 3px solid var(--ink); }
th, td { text-align: left; padding: 0.7rem 0.75rem 0.7rem 0; border-bottom: 1px solid var(--ink); vertical-align: top; }
th { font: 700 0.75rem/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }
td { font-variant-numeric: tabular-nums; }

/* draft note (Claude's notes for William) */
.note { font: 500 0.8125rem/1.5 var(--font-mono); color: var(--muted); border-left: 3px solid var(--blue); padding-left: 0.9rem; margin-top: 1.25rem; max-width: 70ch; }

/* content slots: subtle by default; "Hide markers" shows the page clean */
.slot { display: block; border: 1.5px dashed var(--slot); padding: 0.65rem 0.8rem; color: var(--muted); font-size: 1rem; line-height: 1.5; position: relative; }
.slot::before { content: attr(data-slot) " · " attr(data-owner); display: block; font: 700 0.6875rem/1.2 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--slot); margin-bottom: 0.3rem; }
span.slot { display: inline-block; padding: 0.15rem 0.45rem; font-size: inherit; }
span.slot::before { display: inline; margin: 0 0.4rem 0 0; }
h2 .slot, h3 .slot { font-family: var(--font-head); color: var(--ink); opacity: 0.35; border-width: 0; padding: 0; }
h2 .slot::before, h3 .slot::before { display: none; }
.hide-slots .slot { border-color: transparent; padding-inline: 0; }
.hide-slots .slot::before { display: none; }
.hide-slots .note { display: none; }

/* footer */
.site-footer { background: var(--ink); color: var(--paper); }
.site-footer .wrap { padding-block: 2.5rem; display: grid; gap: 1.25rem; }
.site-footer .logo svg circle:not([fill]) { fill: var(--paper); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font: 700 0.75rem/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.05em; }
.site-footer nav a { text-decoration: none; }
.site-footer p { margin: 0; max-width: 72ch; font-size: 0.875rem; opacity: 0.8; }
.site-footer .fine { font: 500 0.75rem/1.4 var(--font-mono); opacity: 0.6; }

@media (max-width: 860px) {
  .hero-row, .article-head { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; }
  .cols > *, .cols > * + * { padding: 1.25rem 0; border-right: 0; border-bottom: 1px solid var(--ink); }
  .steps { grid-template-columns: 1fr; }
  .steps li, .steps li + li { padding: 1rem 0; border-right: 0; border-bottom: 1px solid var(--ink); }
  .card + .card { padding-left: 0; border-left: 0; }
  .card { padding-right: 0; }
  .legend-row { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .parts > li { grid-template-columns: 1fr; gap: 0.5rem; }
  .claim { grid-template-columns: 1fr; gap: 0.4rem; }
  .meter-row { grid-template-columns: 4.75rem 1fr auto; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* ---- v3 additions: real copy with inline evidence chips ---- */
.prose-copy p { margin: 0 0 0.9rem; max-width: var(--measure); }
.prose-copy p:last-child { margin-bottom: 0; }
.chips { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 0.3rem; vertical-align: 0.1em; margin-left: 0.2rem; }
.chips .pill { font-size: 0.625rem; padding: 0.3rem 0.5rem; }
.chips .status { font-size: 0.625rem; padding: 0.25rem 0.45rem; }
.notice { display: inline-flex; align-items: center; font: 700 0.625rem/1 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; padding: 0.3rem 0.5rem; border-radius: 999px; border: 1.5px solid var(--ink); color: var(--ink); background: var(--paper); white-space: nowrap; }
.labels .notice { font-size: 0.6875rem; padding: 0.4rem 0.6rem; }
.ref { font: 700 0.6875rem/1 var(--font-mono); color: var(--blue); text-decoration: none; padding: 0.15rem 0.3rem; border: 1px solid var(--hair); border-radius: 3px; }
.ref:hover { border-color: var(--blue); }
.flag { display: inline-flex; font: 700 0.5625rem/1 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--slot); border: 1px dashed var(--slot); padding: 0.25rem 0.4rem; border-radius: 3px; }
.hide-slots .flag { display: none; }
.recap { margin: 0; padding-left: 1.25rem; display: grid; gap: 0.75rem; max-width: var(--measure); }
.sources { margin: 0.75rem 0 0; padding-left: 1.5rem; display: grid; gap: 0.6rem; font-size: 0.9375rem; max-width: 80ch; }
.sources li { padding-left: 0.25rem; scroll-margin-top: 1.5rem; }
.sources li:target { background: var(--soft); outline: 2px solid var(--blue); outline-offset: 4px; }
.sources a { word-break: break-word; }
.card h3 { font-size: 1.6rem; }
.card .summary { margin: 0; }
.desc { font-size: 1.15rem; color: var(--muted); margin: 0.75rem 0 0; max-width: 52ch; }
.meter.pending .beads i { opacity: 0.16; }
.legend-row h3 .notice { font-size: 0.75rem; padding: 0.45rem 0.7rem; }
.display { padding-top: 0.1em; }
.display { line-height: 0.94; }
.page-title { line-height: 0.94; }

/* ---- v4: article structure, breadcrumbs, hubs ---- */
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 10; }
.skip:focus { left: 16px; }
.crumbs { border-bottom: 1px solid var(--hair); }
.crumbs ol { list-style: none; margin: 0; padding: .7rem 0; display: flex; flex-wrap: wrap; gap: .25rem .5rem; font: 500 .8125rem/1.4 var(--font-mono); color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: .5rem; color: var(--hair); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }
.crumbs [aria-current] { color: var(--ink); }
.dates { font: 500 .8125rem/1.5 var(--font-mono); color: var(--muted); margin: 1rem 0 0; }
.art-head .desc { max-width: var(--measure); }
.art-grid { display: grid; grid-template-columns: 16rem minmax(0, 1fr); gap: 3rem; align-items: start; }
.art-body { max-width: var(--measure); min-width: 0; }
.toc { position: sticky; top: 1.5rem; border-top: 3px solid var(--ink); padding-top: .9rem; }
.toc h2 { font: 700 .75rem/1.4 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; margin: 0 0 .6rem; }
.toc ol { margin: 0; padding-left: 1.1rem; display: grid; gap: .45rem; font-size: .9375rem; line-height: 1.35; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }
.art-sec { scroll-margin-top: 1.5rem; }
.art-sec + .art-sec { margin-top: 2.75rem; padding-top: 2.25rem; border-top: 1px solid var(--hair); }
.art-sec h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); margin-bottom: 1rem; }
.facts { position: sticky; top: 1.5rem; }
.related { margin-top: 2.75rem; border-top: 3px solid var(--ink); padding-top: 1rem; }
.related h2 { font: 700 .75rem/1.4 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; margin: 0 0 .6rem; }
.related ul { margin: 0; padding-left: 1.1rem; display: grid; gap: .4rem; }
.card-title { font-size: 1.6rem; line-height: 1.02; margin: 0; }
.card-title a { text-decoration: none; }
.card-title a:hover { text-decoration: underline; }
@media (max-width: 860px) {
  .art-grid { grid-template-columns: 1fr; gap: 2rem; }
  .toc, .facts { position: static; }
}