/* ==========================================================================
   Fonts — self-hosted, latin-subset woff2. No third-party requests.
   Files live in static/fonts/ so they publish to /fonts/ with stable URLs.
   ========================================================================== */

@font-face {
  font-family: "Archivo";
  src: url("/fonts/Archivo-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Archivo";
  src: url("/fonts/Archivo-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("/fonts/SourceSerif4-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("/fonts/SourceSerif4-It.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("/fonts/SourceSerif4-Semibold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/IBMPlexMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/IBMPlexMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   Barron Data Consulting
   Blue carries data and retention; red marks things — the rule under BDC,
   section labels, extraction highlights, calls to action. Nothing else.
   ========================================================================== */

:root {
  /* Ground and ink */
  --paper:      #f5f7fa;
  --surface:    #ffffff;
  --ink:        #0e1a2b;
  --ink-body:   #4a5666;
  --ink-muted:  #5b6878;
  --rule:       #dce2e9;

  /* Accents */
  --data:       #2562a8;   /* retention, charts */
  --mark:       #8c2332;   /* labels, marks, actions */

  /* Chart tints, lightening as they descend */
  --tone-review:    #9fb3cb;
  --tone-duplicate: #c7cfda;
  --tone-dispose:   #e1e5eb;

  /* Type */
  --display: "Archivo", ui-sans-serif, system-ui, sans-serif;
  --body:    "Archivo", ui-sans-serif, system-ui, sans-serif;
  --serif:   "Source Serif 4", Georgia, serif;
  --mono:    "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --step--1: clamp(0.8rem, 0.78rem + 0.1vw, 0.88rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.4vw, 1.4rem);
  --step-2:  clamp(1.9rem, 1.5rem + 1.6vw, 3rem);
  --step-3:  clamp(2.6rem, 1.7rem + 3.6vw, 5.25rem);

  --gutter: clamp(1.25rem, 5vw, 6rem);
  --section-gap: clamp(4rem, 8vw, 7rem);
  --logo-height: clamp(3.6rem, 6.5vw, 5.9rem);
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.02;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }

:focus-visible { outline: 2px solid var(--mark); outline-offset: 3px; }

.wrap {
  inline-size: min(84rem, 100% - (var(--gutter) * 2));
  margin-inline: auto;
}

.eyebrow {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mark);
}

.meta {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-muted);
}

.visually-hidden {
  position: absolute; inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; inset-inline-start: -100vw;
  background: var(--ink); color: var(--paper);
  padding: 0.6rem 1rem; font-family: var(--mono); font-size: var(--step--1);
}
.skip-link:focus { inset-inline-start: 0; inset-block-start: 0; z-index: 10; }

/* --- Buttons ------------------------------------------------------------- */

.button {
  display: inline-block;
  font-weight: 600;
  font-size: var(--step-0);
  padding: 1rem 1.6rem;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease;
}

.button--mark { background: var(--mark); color: #ffffff; }
.button--mark:hover { background: #71192a; }

.button--ghost { border-color: var(--ink); color: var(--ink); }
.button--ghost:hover { background: var(--ink); color: var(--paper); }

/* --- Masthead ------------------------------------------------------------ */

.masthead { border-block-end: 1px solid var(--rule); }

.masthead__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.9rem;
}

.wordmark { display: inline-flex; align-items: center; }
.wordmark svg { display: block; block-size: var(--logo-height); inline-size: auto; }

.wordmark__name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: var(--step-1);
  border-block-end: 3px solid var(--mark);
}

.wordmark__qualifier {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-muted);
  letter-spacing: 0.16em;
  margin-inline-start: 0.6ch;
}

.nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2.5rem;
  margin: 0; padding: 0; list-style: none;
  font-family: var(--mono);
  font-size: var(--step--1);
}

.nav a { color: var(--ink-muted); }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); }

.nav__cta {
  background: var(--ink);
  color: var(--paper) !important;
  padding: 0.85rem 1.35rem;
}
.nav__cta:hover { background: var(--mark); }

/* --- Hero ---------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(3rem, 6vw, 5rem) var(--section-gap);
}

@media (min-width: 62rem) {
  .hero { grid-template-columns: 5fr 6fr; }
}

.hero__text { display: flex; flex-direction: column; gap: 1.6rem; }
.hero__headline { font-size: var(--step-3); max-inline-size: 13ch; }
.hero__standfirst { font-size: var(--step-1); color: var(--ink-body); max-inline-size: 42ch; line-height: 1.45; }
.hero__standfirst p + p { margin-block-start: 0.8em; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; padding-block-start: 0.4rem; }

/* --- Estate: the signature chart ----------------------------------------- */
/* Bands sized by share, stacked from what you keep down to what goes. Each
   carries its own label and figure, so no separate legend is needed. */

.estate { margin: 0; display: flex; flex-direction: column; gap: 1rem; }

.estate__head { display: flex; justify-content: space-between; gap: 1rem; }

.estate__stack {
  display: flex;
  flex-direction: column;
  gap: 3px;
  block-size: clamp(20rem, 38vw, 35rem);
}

.estate__band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-inline: 1.4rem;
  min-block-size: 2.75rem;
  background: var(--tone-dispose);
  color: var(--ink-muted);
}

.estate__band--retain    { background: var(--data); color: #ffffff; }
.estate__band--review    { background: var(--tone-review); color: var(--ink); }
.estate__band--duplicate { background: var(--tone-duplicate); color: #3e4a5a; }

.estate__label {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
}

.estate__pct {
  font-weight: 600;
  letter-spacing: -0.04em;
  font-size: var(--band-size, 1.75rem);
  line-height: 1;
}

.estate__note {
  font-family: var(--mono);
  font-size: var(--step--1);
  line-height: 1.6;
  color: var(--ink-muted);
  max-inline-size: 48ch;
}

/* --- Section furniture --------------------------------------------------- */

.section { padding-block: var(--section-gap); }
.section--surface { background: var(--surface); border-block: 1px solid var(--rule); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-block-end: 3rem;
}

.section__heading { font-size: var(--step-2); max-inline-size: 18ch; }

/* --- Services ------------------------------------------------------------ */

.services__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
}

.service { display: flex; flex-direction: column; gap: 1.1rem; }
.service__name { font-size: var(--step-1); }
.service__body { color: var(--ink-body); }

.figure-box {
  block-size: 17.5rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 1.75rem;
  margin-block-end: 0.5rem;
}

.section--surface .figure-box { background: var(--paper); }

/* Ages: file volume by year last modified */
.ages { block-size: 100%; display: flex; flex-direction: column; gap: 0.9rem; }
.ages__bars { flex-grow: 1; display: flex; align-items: flex-end; gap: 3px; }
.ages__bar { flex-grow: 1; background: var(--tone-duplicate); }
.ages__bar--recent { background: var(--data); }
.ages__axis { display: flex; justify-content: space-between; font-family: var(--mono); font-size: var(--step--1); color: var(--ink-muted); }

/* Volume: held today against worth keeping */
.volume { block-size: 100%; display: flex; flex-direction: column; justify-content: center; gap: 1.75rem; }
.volume__row { display: flex; flex-direction: column; gap: 0.6rem; }
.volume__label { font-family: var(--mono); font-size: var(--step--1); color: var(--ink-muted); }
.volume__bar { block-size: 2.75rem; background: var(--tone-duplicate); }
.volume__bar--keep { background: var(--data); }

/* Extract: a page with marked regions feeding structured fields */
.extract { block-size: 100%; display: flex; align-items: center; gap: 1.25rem; }
.extract__page {
  inline-size: 8rem; block-size: 12.5rem;
  background: var(--surface); border: 1px solid var(--tone-duplicate);
  padding: 1rem; display: flex; flex-direction: column; gap: 0.5rem;
}
.extract__line { block-size: 6px; background: var(--rule); }
.extract__region { block-size: 0.7rem; border: 2px solid var(--mark); }
.extract__region--foot { inline-size: 50%; align-self: flex-end; margin-block-start: auto; }
.extract__link { inline-size: 2.25rem; block-size: 2px; background: var(--mark); }
.extract__fields { flex-grow: 1; display: flex; flex-direction: column; gap: 0.9rem; }
.extract__field { display: flex; flex-direction: column; gap: 0.35rem; font-family: var(--mono); font-size: var(--step--1); color: var(--ink-muted); }
.extract__value { block-size: 10px; background: var(--ink); }

/* --- Process ------------------------------------------------------------- */

.process__grid { display: grid; gap: 2rem; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); }

.step {
  display: flex; flex-direction: column; gap: 0.9rem;
  border-block-start: 3px solid var(--ink);
  padding-block-start: 1.4rem;
}
.step:first-child { border-block-start-color: var(--mark); }

.step__n { font-family: var(--mono); font-size: var(--step--1); color: var(--ink-muted); }
.step:first-child .step__n { color: var(--mark); }
.step__name { font-size: var(--step-1); font-weight: 600; }
.step__body { color: var(--ink-body); }

/* --- Call to action ------------------------------------------------------ */

.cta {
  background: var(--ink);
  color: var(--paper);
  padding-block: var(--section-gap);
}

.cta__inner {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 2rem;
}

.cta__headline { font-size: var(--step-2); max-inline-size: 16ch; }
.cta__body { color: #a9b6c6; margin-block-start: 0.9rem; }

/* --- Colophon ------------------------------------------------------------ */

.colophon { padding-block: 2.5rem 3rem; font-family: var(--mono); font-size: var(--step--1); color: var(--ink-muted); }
.colophon__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }

/* --- Interior pages ------------------------------------------------------ */

.page-head {
  background: var(--surface);
  border-block-end: 1px solid var(--rule);
  padding-block: clamp(3rem, 6vw, 5rem);
}

.page-head__inner { display: flex; flex-direction: column; gap: 1.2rem; }
.page-head__text { display: flex; flex-direction: column; gap: 1.2rem; }

@media (min-width: 52rem) {
  .page-head__inner--portrait {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
  }
}

.page-head__portrait {
  inline-size: 13rem;
  block-size: auto;
  flex-shrink: 0;
  border-block-end: 5px solid var(--mark);
}
.page-head__title { font-size: var(--step-2); max-inline-size: 18ch; }

.page-head__lede {
  font-size: var(--step-1);
  line-height: 1.45;
  color: var(--ink-body);
  max-inline-size: 46ch;
}
.page-head__lede p { margin: 0; }
.page-head__lede p + p { margin-block-start: 0.7em; }

.page-body { padding-block: var(--section-gap); }

@media (min-width: 60rem) {
  .page-body--toc {
    display: grid;
    grid-template-columns: 14rem minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }
  .toc { position: sticky; inset-block-start: 2rem; }
}

.toc { font-family: var(--mono); font-size: var(--step--1); }
.toc__title { color: var(--ink-muted); letter-spacing: 0.1em; text-transform: uppercase; margin-block-end: 1rem; }
.toc__list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }
.toc a { color: var(--ink-body); border-inline-start: 2px solid var(--rule); padding-inline-start: 0.9rem; display: block; }
.toc a:hover { color: var(--ink); border-inline-start-color: var(--mark); }

/* --- Prose --------------------------------------------------------------- */

.prose { max-inline-size: 38rem; }
.prose > * + * { margin-block-start: 1.1em; }

.prose h2 {
  font-size: var(--step-1);
  margin-block-start: 2.4em;
  padding-block-start: 1.2rem;
  border-block-start: 1px solid var(--rule);
}
.prose h3 { font-size: var(--step-0); font-weight: 700; margin-block-start: 1.8em; }
.prose h2:first-child, .prose h3:first-child { margin-block-start: 0; }

.prose p, .prose li { color: var(--ink-body); }
.prose a { color: var(--ink); text-decoration: underline; text-underline-offset: 0.18em; text-decoration-color: var(--mark); }
.prose strong { color: var(--ink); font-weight: 600; }

.prose ul, .prose ol { padding-inline-start: 1.3rem; }
.prose li + li { margin-block-start: 0.5em; }
.prose li::marker { color: var(--mark); }

.prose blockquote {
  margin: 2em 0;
  padding-inline-start: 1.4rem;
  border-inline-start: 3px solid var(--mark);
  font-size: var(--step-1);
  line-height: 1.45;
  color: var(--ink);
}
.prose blockquote p { color: inherit; }

.prose code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface);
  border: 1px solid var(--rule);
  padding: 0.1em 0.35em;
}
.prose pre {
  font-family: var(--mono);
  font-size: var(--step--1);
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem;
  overflow-x: auto;
}
.prose pre code { background: none; border: 0; padding: 0; color: inherit; }

.prose table { inline-size: 100%; border-collapse: collapse; font-size: var(--step--1); }
.prose th, .prose td { text-align: start; padding: 0.7rem 0.9rem; border-block-end: 1px solid var(--rule); }
.prose th { font-family: var(--mono); font-weight: 400; color: var(--ink-muted); letter-spacing: 0.04em; }

.prose hr { border: 0; border-block-start: 1px solid var(--rule); margin-block: 2.5em; }
.prose img { max-inline-size: 100%; block-size: auto; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}