/* ───────────────────────────────────────────────
   GERREHBENTA FINANCE — design tokens
   Paper-white field, hairline cartography, mono + serif
   ─────────────────────────────────────────────── */
:root {
  --paper:   #ffffff;
  --ink:     #161616;
  --gray:    #6e6e68;
  --line:    #dededa;
  --faint:   #efefea;
  --chip:    #f2f2ee;

  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --max: 1240px;
  --pad: clamp(20px, 4vw, 48px);
}

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

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--ink); color: var(--paper); }

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

img { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

/* ── mono utilities ───────────────────────────── */
.mono { font-family: var(--mono); }

.label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .09em;
  text-transform: uppercase;
  background: var(--chip);
  padding: 4px 8px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.label .arrow { font-family: var(--mono); }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
  display: block;
  margin-bottom: 18px;
}

/* ── navigation ───────────────────────────────── */
.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 34px;
  padding-bottom: 34px;
}
.nav .wordmark {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.nav .wordmark span { color: var(--gray); }
.nav ul {
  display: flex;
  gap: clamp(18px, 3.5vw, 44px);
  list-style: none;
}
.nav ul a {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink);
  position: relative;
}
.nav ul a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -5px;
  border-bottom: 1px solid var(--ink);
  transition: right .25s ease;
}
.nav ul a:hover::after, .nav ul a[aria-current="page"]::after { right: 0; }
.nav ul a[aria-current="page"] { color: var(--ink); }

.menu-toggle { display: none; }

/* ── hero (homepage) ──────────────────────────── */
.hero {
  position: relative;
  min-height: calc(100vh - 110px);
  min-height: calc(100svh - 110px);
}
.contour-stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contour-stage svg { width: min(62vmin, 660px); height: auto; }

.hero-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-lines line { stroke: var(--ink); stroke-width: 1; }

.annotation {
  position: absolute;
  max-width: 330px;
}
.annotation .node {
  width: 10px; height: 10px;
  background: var(--ink);
  display: inline-block;
  margin-bottom: 10px;
}
.annotation p {
  font-size: 18px;
  line-height: 1.45;
  margin-top: 10px;
}
.annotation .label:hover { background: var(--ink); color: var(--paper); }

.anno-about   { left: var(--pad); top: 38%; }
.anno-research{ right: var(--pad); top: 8%; }
.anno-letter  { right: var(--pad); bottom: 10%; }

.hero-title {
  position: absolute;
  left: var(--pad);
  bottom: 8%;
  max-width: 400px;
}
.hero-title h1 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(20px, 2.2vw, 27px);
  line-height: 1.45;
  letter-spacing: -.01em;
}
.hero-title .coords {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
  margin-top: 14px;
  display: block;
}

/* mini chips row under research annotation */
.chip-row { display: flex; gap: 10px; margin-top: 14px; }
.chip-row .spec {
  width: 64px; height: 64px;
  border: 1px dashed var(--gray);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .06em;
  text-align: center;
  color: var(--ink);
  line-height: 1.3;
  padding: 4px;
}

/* ── page hero (interior pages) ───────────────── */
.page-head {
  padding-top: clamp(48px, 8vh, 90px);
  padding-bottom: clamp(40px, 6vh, 72px);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.page-head h1 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -.015em;
  max-width: 760px;
  line-height: 1.25;
}
.page-head .lede {
  margin-top: 22px;
  max-width: 620px;
  font-size: 19px;
  color: var(--ink);
}
.page-head .ornament {
  position: absolute;
  right: calc(-1 * var(--pad));
  top: 50%;
  transform: translateY(-50%);
  opacity: .8;
  pointer-events: none;
}
.page-head .ornament svg { width: clamp(180px, 24vw, 320px); height: auto; }

/* ── sections ─────────────────────────────────── */
.section { padding-top: clamp(56px, 9vh, 110px); padding-bottom: clamp(56px, 9vh, 110px); }
.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: clamp(32px, 5vh, 56px);
}
.section-head h2 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 28px);
  letter-spacing: -.01em;
}
.section-head .more {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
  border-bottom: 1px solid transparent;
}
.section-head .more:hover { color: var(--ink); border-color: var(--ink); }

/* ── research quadrant grid ───────────────────── */
.quadrants {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.quadrant {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 28px 26px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 230px;
  position: relative;
  transition: background .25s ease;
}
.quadrant:hover { background: var(--chip); }
.quadrant .ref {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
}
.quadrant h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 16.5px;
  letter-spacing: -.005em;
}
.quadrant p { font-size: 15.5px; color: var(--gray); line-height: 1.55; }
.quadrant .go {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
}
.quadrant:hover .go { text-decoration: underline; text-underline-offset: 4px; }

/* ── publication list ─────────────────────────── */
.pub-list { border-top: 1px solid var(--line); }
.pub {
  display: grid;
  grid-template-columns: 130px 1fr 150px;
  gap: 28px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}
.pub:hover { background: var(--chip); }
.pub .date, .pub .kind {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--gray);
}
.pub .kind { text-align: right; }
.pub h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.4;
}
.pub p.abstract { font-size: 15px; color: var(--gray); margin-top: 6px; max-width: 640px; }

/* featured report card */
.featured {
  border: 1px dashed var(--gray);
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(28px, 5vw, 72px);
  margin-bottom: clamp(40px, 6vh, 64px);
}
.featured h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.35;
  margin: 14px 0 16px;
}
.featured p { color: var(--gray); font-size: 16.5px; }
.featured .meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--gray);
  display: flex; flex-direction: column; gap: 10px;
  border-left: 1px solid var(--line);
  padding-left: clamp(20px, 3vw, 40px);
  justify-content: center;
}
.featured .meta b { color: var(--ink); font-weight: 400; }

/* ── methodology / principles ─────────────────── */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(28px, 4vw, 56px); }
.principle .node { width: 10px; height: 10px; background: var(--ink); margin-bottom: 18px; }
.principle h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 16px;
  margin-bottom: 12px;
}
.principle p { font-size: 16px; color: var(--gray); }

/* numbered prose (about / methodology long-form) */
.tenets { max-width: 760px; }
.tenet {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.tenet:first-child { border-top: 1px solid var(--line); }
.tenet .ref { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--gray); padding-top: 4px; }
.tenet h3 { font-family: var(--mono); font-weight: 400; font-size: 17px; margin-bottom: 10px; }
.tenet p { color: var(--gray); font-size: 16px; }

/* ── prose blocks ─────────────────────────────── */
.prose { max-width: 680px; }
.prose p { margin-bottom: 1.3em; font-size: 18px; }
.prose p:last-child { margin-bottom: 0; }
.prose .drop { font-size: 21px; line-height: 1.55; }

.two-col {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
.two-col .sticky-label { position: sticky; top: 40px; }

/* ── research area detail rows ────────────────── */
.area {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(28px, 5vw, 80px);
  padding: clamp(44px, 7vh, 72px) 0;
  border-bottom: 1px solid var(--line);
}
.area:first-of-type { border-top: 1px solid var(--line); }
.area .side { font-family: var(--mono); }
.area .side .ref { font-size: 11px; letter-spacing: .1em; color: var(--gray); display: block; margin-bottom: 10px; }
.area .side h3 { font-weight: 400; font-size: 17px; line-height: 1.5; }
.area .body p { font-size: 17px; margin-bottom: 1.2em; max-width: 640px; }
.area .body p:last-of-type { margin-bottom: 0; }
.area .threads {
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 2.1;
  color: var(--gray);
}
.area .threads span { display: block; }
.area .threads span::before { content: "— "; color: var(--line); }

/* ── team ─────────────────────────────────────── */
.team { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.member {
  border: 1px dashed var(--gray);
  padding: 22px 20px 24px;
  min-height: 190px;
  display: flex; flex-direction: column;
}
.member .initials {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gray);
  margin-bottom: auto;
}
.member h3 { font-family: var(--mono); font-weight: 400; font-size: 15px; margin-top: 26px; }
.member p { font-family: var(--mono); font-size: 11.5px; letter-spacing: .05em; color: var(--gray); margin-top: 6px; line-height: 1.6; }

/* ── newsletter / forms ───────────────────────── */
.letter-box {
  border: 1px dashed var(--gray);
  padding: clamp(32px, 5vw, 56px);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}
.letter-box h2 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 26px);
  margin: 14px 0 12px;
}
.letter-box p { color: var(--gray); font-size: 16.5px; max-width: 460px; }

.signup { display: flex; gap: 0; border: 1px solid var(--ink); }
.signup input {
  flex: 1;
  border: 0;
  padding: 15px 16px;
  font-family: var(--mono);
  font-size: 13.5px;
  background: var(--paper);
  color: var(--ink);
  min-width: 0;
}
.signup input::placeholder { color: var(--gray); }
.signup button {
  border: 0;
  border-left: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 0 22px;
  cursor: pointer;
}
.signup button:hover { background: #2e2e2e; }
.signup-note {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--gray);
  margin-top: 12px;
  min-height: 1.4em;
}

/* contact details */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-cell { border-top: 1px solid var(--line); padding-top: 18px; }
.contact-cell .eyebrow { margin-bottom: 12px; }
.contact-cell a, .contact-cell p { font-family: var(--mono); font-size: 13.5px; line-height: 1.8; }
.contact-cell a:hover { text-decoration: underline; text-underline-offset: 4px; }
.fingerprint { word-break: break-all; color: var(--gray); font-size: 12px !important; }

/* ── footer ───────────────────────────────────── */
footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 56px;
  margin-top: clamp(56px, 9vh, 110px);
}
.foot {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.foot .wordmark {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.foot nav { display: flex; gap: 28px; flex-wrap: wrap; }
.foot nav a { font-family: var(--mono); font-size: 12px; color: var(--gray); }
.foot nav a:hover { color: var(--ink); }
.colophon {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--gray);
  margin-top: 28px;
}

/* ── reveal animation ─────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ── responsive ───────────────────────────────── */
@media (max-width: 1020px) {
  .quadrants { grid-template-columns: repeat(2, 1fr); }
  .team { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .two-col .sticky-label { position: static; }
}

@media (max-width: 820px) {
  .nav ul { display: none; }
  .nav.open ul {
    display: flex;
    position: absolute;
    top: 84px; left: 0; right: 0;
    background: var(--paper);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px var(--pad);
    z-index: 30;
  }
  .nav.open ul a { display: block; padding: 14px 0; border-bottom: 1px solid var(--faint); }
  .nav { position: relative; }
  .menu-toggle {
    display: block;
    background: none;
    border: 1px solid var(--ink);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .08em;
    padding: 7px 12px;
    cursor: pointer;
  }

  .hero { min-height: 0; padding-bottom: 24px; }
  .contour-stage { position: static; padding: 12px 0 8px; }
  .contour-stage svg { width: min(78vw, 420px); }
  .hero-lines { display: none; }
  .annotation, .hero-title { position: static; max-width: 560px; margin: 26px auto 0; padding: 0 var(--pad); }
  .annotation .node { display: none; }
  .hero-title { margin-top: 38px; }

  .area { grid-template-columns: 1fr; gap: 18px; }
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .pub .kind { text-align: left; }
  .featured, .letter-box { grid-template-columns: 1fr; }
  .featured .meta { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 20px; }
  .principles { grid-template-columns: 1fr; gap: 36px; }
  .tenet { grid-template-columns: 64px 1fr; gap: 18px; }
  .page-head .ornament { display: none; }
}

@media (max-width: 560px) {
  .quadrants { grid-template-columns: 1fr; }
  .team { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .signup { flex-direction: column; }
  .signup button { border-left: 0; border-top: 1px solid var(--ink); padding: 14px; }
}