/* ════════════════════════════════════════════════════════════
   SVL — shared site stylesheet
   Used by every page. Imports site tokens, defines the masthead,
   colophon, type primitives, and section scaffolding shared
   across home, briefs, research, programmes, contact.
   ════════════════════════════════════════════════════════════ */

:root {
  --page-bg: var(--paper);
  --page-ink: var(--ink);
  --page-rule: #b8ac90;
  --page-rule-soft: #d6c9a8;
  --accent: var(--forest-deep);
  --shelf: #ece4d0;
  --gutter: clamp(20px, 4vw, 56px);
  --col-max: 1240px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { font-size: 16px; }
body {
  background: var(--page-bg);
  color: var(--page-ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 17px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--ink); color: var(--paper); }

.sans { font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif; }
.mono { font-family: "JetBrains Mono", ui-monospace, Menlo, monospace; font-variant-numeric: tabular-nums; }

.eyebrow {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink-3);
}
.folio {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: 0.18em; color: var(--ink-3); text-transform: uppercase;
}

h1, h2, h3, h4 {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 500; margin: 0; letter-spacing: -0.012em; color: var(--ink);
}
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.12; letter-spacing: -0.018em; font-weight: 400; }
h3 { font-size: 22px; line-height: 1.22; font-weight: 500; }
p { margin: 0; }

a { color: inherit; text-decoration: none; }
a.inline { border-bottom: 1px solid var(--page-rule-soft); transition: border-color 160ms ease, color 160ms ease; }
a.inline:hover { border-bottom-color: var(--accent); color: var(--accent); }

.page { max-width: var(--col-max); margin: 0 auto; padding: 0 var(--gutter); }

/* ════════ Masthead ════════ */
.masthead {
  border-bottom: 1px solid var(--page-rule);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(244, 239, 228, 0.92);
}
.masthead-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--gutter);
  max-width: var(--col-max); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 38px; height: 38px;
  border: 1px solid var(--ink);
  display: grid; place-items: center;
  font-family: "Source Serif 4", serif;
  line-height: 1; color: var(--ink);
  position: relative;
  flex-shrink: 0;
}
.brand-mark svg { display: block; width: 100%; height: 100%; }
.brand-words { display: flex; flex-direction: column; gap: 1px; line-height: 1; }
.brand-words .name {
  font-family: "Source Serif 4", serif;
  font-weight: 500; font-size: 18px; letter-spacing: -0.005em; color: var(--ink);
}
.brand-words .place {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
  margin-top: 4px;
}
.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-family: "Inter", sans-serif; font-size: 13.5px; color: var(--ink-2); letter-spacing: 0.005em;
  padding-bottom: 3px; border-bottom: 1px solid transparent; transition: color 160ms ease, border-color 160ms ease;
}
.nav a:hover { color: var(--ink); }
.nav a.active { color: var(--ink); border-bottom-color: var(--accent); }
.nav .ar {
  font-family: "Source Serif 4", serif;
  font-size: 15px; color: var(--ink-3); padding-left: 22px; margin-left: 6px;
  border-left: 1px solid var(--page-rule); border-bottom: 0;
}
.nav .ar:hover { color: var(--ink); }

@media (max-width: 880px) {
  .masthead-inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 12px;
  }
  .brand { min-width: 0; }
  .brand-words { min-width: 0; }
  .nav {
    width: 100%;
    max-width: 100%;
    gap: 10px 18px;
    flex-wrap: wrap;
    justify-content: flex-start;
    border-top: 1px solid var(--page-rule-soft);
    padding-top: 10px;
  }
  .nav a { font-size: 12.5px; }
  .brand-words .place { display: none; }
}

/* ════════ Sec scaffold ════════ */
section.sec {
  padding: clamp(56px, 8vw, 112px) 0;
  border-bottom: 1px solid var(--page-rule);
}
.sec-head {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(28px, 4vw, 64px);
  margin-bottom: clamp(36px, 5vw, 64px);
}
@media (max-width: 880px) { .sec-head { grid-template-columns: 1fr; gap: 20px; } }
.sec-head .label {
  display: flex; align-items: baseline; gap: 14px;
  border-top: 1px solid var(--ink); padding-top: 14px;
  height: fit-content;
}
.sec-head .label .n,
.sec-head .label .t {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink);
}
.sec-head h2 { max-width: 22ch; }
.sec-head .lede {
  font-family: "Source Serif 4", serif;
  font-size: 17px; line-height: 1.55; color: var(--ink-2);
  max-width: 56ch; margin-top: 18px;
}

/* ════════ Page-header (used on subpages) ════════ */
.page-header {
  padding: clamp(56px, 8vw, 96px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--page-rule);
}
.page-header .crumb {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 18px;
}
.page-header .crumb a { color: var(--ink-3); }
.page-header .crumb a:hover { color: var(--ink); }
.page-header h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 400;
  font-size: clamp(40px, 5.6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: var(--ink);
  max-width: 16ch;
}
.page-header h1 em { font-style: italic; color: var(--ink-2); font-weight: 400; }
.page-header .lede {
  margin-top: 28px;
  font-family: "Source Serif 4", serif;
  font-size: 18px; line-height: 1.55; color: var(--ink-2);
  max-width: 60ch;
}
.page-header .lede em { color: var(--ink); font-style: italic; }
.page-header .page-thesis {
  margin-top: 20px;
  font-family: "Source Serif 4", serif;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.15;
  font-style: italic;
  color: var(--ink);
  letter-spacing: -0.012em;
  max-width: 28ch;
}
.page-header .definition {
  margin-top: 12px;
  font-family: "Source Serif 4", serif;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink-3);
  max-width: 58ch;
}
.page-header .meta {
  margin-top: clamp(28px, 4vw, 44px);
  display: flex; flex-wrap: wrap; gap: 0;
  border-top: 1px solid var(--page-rule);
}
.page-header .meta > div {
  flex: 1 1 200px;
  padding: 16px 24px 16px 0;
  border-right: 1px solid var(--page-rule-soft);
}
.page-header .meta > div:not(:first-child) {
  padding-left: 24px;
}
.page-header .meta > div:last-child { border-right: 0; }
.page-header .meta .k {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
  display: block; margin-bottom: 10px;
}
.page-header .meta .v {
  font-family: "Source Serif 4", serif;
  font-size: 15px; color: var(--ink); font-style: italic;
  line-height: 1.35;
}

/* Mobile: stack meta cells with bottom rules instead of side rules */
@media (max-width: 600px) {
  .page-header .meta > div {
    flex: 1 1 100%;
    padding: 14px 0;
    border-right: 0;
    border-bottom: 1px solid var(--page-rule-soft);
  }
  .page-header .meta > div:last-child { border-bottom: 0; }
}

/* ════════ Colophon ════════ */
footer.colophon { background: var(--page-bg); padding: clamp(56px, 7vw, 96px) 0 36px; }
.colo-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--page-rule);
}
@media (max-width: 880px) { .colo-top { grid-template-columns: 1fr; } }
.colo-top .brand-block { display: flex; flex-direction: column; gap: 18px; }
.colo-top .brand-block .lockup { display: flex; align-items: flex-start; gap: 16px; }
.colo-top .brand-block .lockup .brand-mark { width: 48px; height: 48px; }
.colo-top .brand-block .lockup .words { display: flex; flex-direction: column; gap: 4px; }
.colo-top .brand-block .lockup .words .name {
  font-family: "Source Serif 4", serif; font-size: 19px; font-weight: 500; line-height: 1.1; color: var(--ink);
}
.colo-top .brand-block .lockup .words .place {
  font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 10px;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
}
.colo-top .brand-block p {
  font-family: "Source Serif 4", serif; font-size: 14.5px; line-height: 1.55; color: var(--ink-2);
  max-width: 38ch;
}
.colo-top .brand-block p.footer-thesis {
  font-style: italic;
  color: var(--ink);
  margin-bottom: -6px;
}
.colo-top .brand-block p.footer-disclaimer {
  font-size: 12.5px;
  color: var(--ink-3);
  max-width: 46ch;
}
.colo-col { display: flex; flex-direction: column; gap: 14px; }
.colo-col .h {
  font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 10px;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
  padding-bottom: 10px; border-bottom: 1px solid var(--page-rule-soft);
}
.colo-col a {
  font-family: "Source Serif 4", serif; font-size: 15px; color: var(--ink-2);
  transition: color 160ms ease;
}
.colo-col a:hover { color: var(--ink); }
.colo-bot {
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3);
  flex-wrap: wrap; gap: 12px;
}
.colo-bot .right { display: flex; gap: 22px; flex-wrap: wrap; }

/* ════════ Brief cover (shared) ════════ */
.brief-cover {
  aspect-ratio: 4 / 5;
  background: var(--card);
  border: 1px solid var(--ink);
  box-shadow: 2px 2px 0 0 var(--page-rule);
  padding: 22px;
  position: relative;
  display: flex; flex-direction: column; justify-content: space-between;
  overflow: hidden;
}
.brief-cover::before {
  content: "";
  position: absolute; inset: 8px;
  border: 1px solid var(--page-rule-soft);
  pointer-events: none;
}
.brief-cover .top { position: relative; display: flex; flex-direction: column; gap: 8px; }
.brief-cover .top .imprint {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-2);
  padding-bottom: 8px; border-bottom: 1px solid var(--ink);
}
.brief-cover .ttl {
  position: relative;
  font-family: "Source Serif 4", serif;
  font-weight: 500;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin-top: 18px;
  max-width: 14ch;
}
.brief-cover .bot {
  position: relative;
  display: flex; flex-direction: column; gap: 6px;
  padding-top: 12px; border-top: 1px solid var(--ink);
}
.brief-cover .bot .seriestxt {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 9px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-3);
}
.brief-cover .bot .num {
  font-family: "Source Serif 4", serif;
  font-style: italic; font-size: 12px; color: var(--ink-2);
}