/* ============================================================
   INFLECTION POINT — design tokens
   Palette pulled from the logo's own gray; kept deliberately
   monochrome to match "minimal, understated" brief.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Zilla+Slab:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Color */
  --paper: #FAFAF8;
  --paper-raised: #FFFFFF;
  --ink: #1C1B1A;
  --curve-gray: #86868A;   /* lifted directly from the logo */
  --curve-gray-dark: #55555A;
  --line: #DEDDD8;
  --line-strong: #B9B8B3;

  /* Type */
  --font-display: 'Zilla Slab', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Layout */
  --content-width: 760px;
  --wide-width: 980px;
  --gutter: clamp(24px, 5vw, 64px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--curve-gray);
  color: #fff;
}

a {
  color: var(--ink);
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
a:hover { text-decoration-color: var(--ink); }

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1.2em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--curve-gray-dark);
  display: block;
  margin-bottom: 0.9em;
}

/* ============================================================
   Layout shells
   ============================================================ */

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

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

/* ============================================================
   Header / nav
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand img {
  height: 34px;
  width: auto;
  display: block;
}

.brand span {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--ink);
  white-space: nowrap;
}

nav.primary-nav {
  display: flex;
  flex-wrap: wrap;
}

nav.primary-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--curve-gray-dark);
  text-decoration: none;
  padding: 4px 0;
  margin-left: 28px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

nav.primary-nav a:first-child {
  margin-left: 0;
}

nav.primary-nav a:hover,
nav.primary-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--curve-gray);
}

/* mobile nav toggle */
.nav-toggle {
  appearance: none;
  -webkit-appearance: none;
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  nav.primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper-raised);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px var(--gutter) 18px;
  }
  nav.primary-nav.open { display: flex; }
  nav.primary-nav a { margin-left: 0; padding: 12px 0; border-bottom: 1px solid var(--line); }
}

/* ============================================================
   Curve signature — the one recurring motif.
   An SVG line that changes concavity: a literal inflection point.
   ============================================================ */

/* ============================================================
   Hero (About / home page)
   ============================================================ */

.hero {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 640px) {
  .hero {
    padding: 56px 0 40px;
  }
}

.hero h1 {
  font-size: clamp(22px, 2.7vw, 27px);
  font-weight: 500;
  max-width: 42ch;
  color: var(--curve-gray-dark);
  margin: 0;
}

.hero__top {
  display: flex;
  align-items: center;
  margin-bottom: 40px;
}

.hero__logo {
  height: 120px;
  width: auto;
  flex-shrink: 0;
  display: block;
  margin: 0 32px 0 0;
}

.hero__tagline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero__tagline li {
  font-size: 16px;
  line-height: 1.5;
  color: var(--curve-gray-dark);
  margin-bottom: 10px;
}

.hero__tagline li:last-child {
  margin-bottom: 0;
}

.hero__tagline strong {
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 640px) {
  .hero__top { flex-direction: column; align-items: flex-start; }
  .hero__logo { height: 84px; margin: 0 0 24px 0; }
}

.hero__lede {
  font-size: 20px;
  line-height: 1.55;
  color: var(--curve-gray-dark);
  max-width: 46ch;
  margin-top: 20px;
}

/* Dictionary-style definition block */
.definition {
  margin-top: 48px;
  padding: 28px 32px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--curve-gray);
  max-width: 560px;
}

.definition__headword {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 24px;
  font-weight: 600;
  margin: 0;
}

.definition__pos {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--curve-gray-dark);
  font-size: 15px;
  margin-left: 8px;
}

.definition ol {
  margin: 16px 0 0;
  padding-left: 22px;
}

.definition li {
  margin-bottom: 10px;
  font-size: 15.5px;
}

.definition li:last-child { margin-bottom: 0; }

.definition cite {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: var(--curve-gray-dark);
  margin-top: 4px;
}

.definition blockquote {
  margin: 0;
  font-style: italic;
}

@media (max-width: 640px) {
  .definition {
    margin-top: 32px;
    padding: 18px 20px;
  }

  .definition__headword {
    font-size: 19px;
  }

  .definition__pos {
    font-size: 13px;
  }

  .definition ol {
    margin-top: 10px;
    padding-left: 18px;
  }

  .definition li {
    margin-bottom: 6px;
    font-size: 14px;
    line-height: 1.4;
  }

  .definition cite {
    font-size: 12px;
    margin-top: 2px;
  }
}

/* ============================================================
   Section headings
   ============================================================ */

section.block {
  padding: 56px 0;
}

section.block + section.block {
  border-top: 1px solid var(--line);
}

.block h2 {
  font-size: clamp(26px, 3.4vw, 32px);
}

/* ============================================================
   Services grid
   ============================================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 32px;
}

.service-card {
  background: var(--paper-raised);
  padding: 28px 30px;
}

.service-card__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--curve-gray);
  display: block;
  margin-bottom: 14px;
}

.service-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 15px;
  color: var(--curve-gray-dark);
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Expertise list (About page)
   ============================================================ */

.expertise {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.expertise__item {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
}

.expertise__item h3 {
  font-size: 17px;
  margin: 0;
  color: var(--ink);
}

.expertise__item p { margin: 0; font-size: 15.5px; }

@media (max-width: 640px) {
  .expertise__item { grid-template-columns: 1fr; gap: 8px; }
}

.content-list {
  margin: 20px 0 0;
  padding-left: 0;
  list-style: none;
}

.content-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 14px;
  font-size: 15.5px;
  line-height: 1.55;
}

.content-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--curve-gray);
}

.content-list li:last-child { margin-bottom: 0; }

/* ============================================================
   Pull quote
   ============================================================ */

.pull-quote {
  margin: 56px 0;
  padding: 8px 0 8px 28px;
  border-left: 3px solid var(--curve-gray);
}

.pull-quote p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 19px;
  line-height: 1.5;
  margin: 0 0 14px;
  color: var(--ink);
}

.pull-quote cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 13px;
  color: var(--curve-gray-dark);
  display: block;
}

/* ============================================================
   Biography timeline
   ============================================================ */

.timeline {
  margin-top: 20px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 106px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-strong);
}

@media (max-width: 640px) {
  .timeline::before { left: 0; }
}

.timeline-entry {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 28px;
  position: relative;
  padding-bottom: 40px;
}

.timeline-entry:last-child { padding-bottom: 0; }

.timeline-entry__year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--curve-gray-dark);
  padding-top: 3px;
  text-align: right;
}

.timeline-entry__year::after {
  content: '';
  position: absolute;
  left: 106px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--curve-gray);
  transform: translateX(-50%);
}

.timeline-entry h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.timeline-entry p {
  font-size: 15.5px;
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .timeline-entry { grid-template-columns: 1fr; padding-left: 20px; gap: 6px; }
  .timeline-entry__year { text-align: left; padding-top: 0; font-weight: 600; }
  .timeline-entry__year::after { left: 0; top: 6px; }
}

/* ============================================================
   Accordion (Clients page)
   ============================================================ */

.accordion {
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.accordion-item {
  border-bottom: 1px solid var(--line);
}

.accordion-trigger {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  background: none;
  border: none;
  padding: 24px 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 600;
  color: var(--ink);
}

.accordion-trigger__count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--curve-gray-dark);
  font-weight: 400;
  flex-shrink: 0;
}

.accordion-trigger__icon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-left: 12px;
  position: relative;
}
.accordion-trigger__icon::before,
.accordion-trigger__icon::after {
  content: '';
  position: absolute;
  background: var(--curve-gray-dark);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.accordion-trigger__icon::before { width: 14px; height: 1.5px; }
.accordion-trigger__icon::after { width: 1.5px; height: 14px; transition: transform 0.2s ease; }
.accordion-item.open .accordion-trigger__icon::after { transform: translate(-50%, -50%) rotate(90deg) scale(0); }

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.open .accordion-panel {
  max-height: 4000px;
}

.accordion-panel__inner {
  padding: 0 0 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.accordion-panel__inner .eyebrow:not(:first-child) {
  margin-top: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.project {
  padding-left: 20px;
  border-left: 2px solid var(--line);
}

.project__meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--curve-gray-dark);
  display: block;
  margin-bottom: 6px;
}

.project h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
  margin: 0 0 6px;
}

.project p {
  font-size: 15px;
  margin: 0;
  color: var(--ink);
}

.project p + p { margin-top: 8px; }

/* ============================================================
   Publications / speaking lists
   ============================================================ */

.pub-list {
  border-top: 1px solid var(--line);
  margin-top: 20px;
}

.pub-entry {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.pub-entry__year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--curve-gray-dark);
  padding-top: 2px;
}

.pub-entry h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
  margin: 0 0 4px;
}

.pub-entry p {
  font-size: 15px;
  margin: 0;
  color: var(--curve-gray-dark);
}

@media (max-width: 560px) {
  .pub-entry { grid-template-columns: 1fr; gap: 4px; }
  .pub-entry__year { font-weight: 600; }
}

/* ============================================================
   Page header (non-home pages)
   ============================================================ */

.page-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 42px);
}

.page-hero__lede {
  font-size: 18px;
  color: var(--curve-gray-dark);
  max-width: 56ch;
  margin-top: 14px;
}

/* ============================================================
   CTA / contact strip
   ============================================================ */

.cta-strip {
  background: var(--ink);
  color: var(--paper);
  padding: 64px 0;
}

.cta-strip h2 {
  color: var(--paper);
  font-size: clamp(24px, 3.2vw, 32px);
}

.cta-strip p {
  color: #C9C8C4;
  max-width: 50ch;
  font-size: 16px;
}

.cta-links {
  display: flex;
  flex-wrap: wrap;
  margin-top: 24px;
}

.cta-links .button {
  margin-right: 16px;
}

.cta-links .button:last-child {
  margin-right: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 14px 22px;
  margin-top: 0;
  border: 1px solid var(--paper);
  transition: background 0.15s ease, color 0.15s ease;
}

.button:hover {
  background: transparent;
  color: var(--paper);
}

/* ============================================================
   Footer
   ============================================================ */

footer.site-footer {
  padding: 40px 0 56px;
}

.site-footer__inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.site-footer__brand {
  color: var(--curve-gray-dark);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

@media (max-width: 640px) {
  .site-footer__inner { flex-direction: column; align-items: flex-start; text-align: left; }
}

/* ============================================================
   Utility
   ============================================================ */

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}