/* ============================================
   ANTHROLENS — Design System v2
   Behavioral science for public health
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@300;400;500;600;700&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400&display=swap');

:root {
  /* Brand palette pulled from the logo files */
  --paper: #f4f1e8;
  --paper-warm: #ede9dc;
  --ink: #1a2128;
  --ink-soft: #4a525b;
  --ink-faint: #7a8189;
  --accent: #2b7a78;
  --accent-deep: #1f5856;
  --line: #1a2128;
  --line-soft: rgba(26, 33, 40, 0.12);

  --display: 'Inter Tight', system-ui, sans-serif;
  --body: 'Inter Tight', system-ui, sans-serif;
  --serif: 'Newsreader', Georgia, serif;

  --maxw: 1240px;
  --pad: clamp(1.25rem, 4vw, 3rem);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 241, 232, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.1rem var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 500;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: 2.25rem;
  list-style: none;
  font-size: 0.94rem;
  font-weight: 400;
}

.nav-links a {
  position: relative;
  color: var(--ink-soft);
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--ink); }

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--accent);
}

.nav-cta {
  background: var(--ink);
  color: var(--paper);
  padding: 0.65rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 4px;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--accent); }

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--ink);
}

/* ============================================
   Container
   ============================================ */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ============================================
   Typography
   ============================================ */
.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.5rem, 6.5vw, 5.25rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 500;
  margin-bottom: 0.6rem;
}

h4 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.serif {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
}

.serif-emph {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

p {
  color: var(--ink-soft);
  max-width: 62ch;
}

p.lede {
  font-size: 1.2rem;
  color: var(--ink);
  line-height: 1.55;
  max-width: 55ch;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.9rem 1.5rem;
  font-weight: 500;
  font-size: 0.95rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--body);
}

.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn-arrow::after {
  content: '→';
  transition: transform 0.2s;
  display: inline-block;
}

.btn:hover .btn-arrow::after { transform: translateX(3px); }

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(4rem, 9vw, 7rem);
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 2rem;
}

.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero h1 {
  max-width: 18ch;
  margin-bottom: 2rem;
}

.hero h1 .serif-emph { font-size: 0.95em; }

.hero-lede {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--ink-soft);
  max-width: 58ch;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Crosshair watermark behind hero */
.hero-watermark {
  position: absolute;
  top: 4rem;
  right: -6rem;
  width: 460px;
  height: 460px;
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
}

.hero-watermark svg { width: 100%; height: 100%; }

.hero > .container { position: relative; z-index: 2; }

/* ============================================
   Funder strip
   ============================================ */
.funders {
  padding: 2.5rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.funders-label {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  margin-bottom: 1.25rem;
}

.funders-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem 3.5rem;
  align-items: center;
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--ink);
}

.funders-list span {
  position: relative;
  padding-right: 0;
}

/* ============================================
   Sections
   ============================================ */
.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.section-dark {
  background: var(--ink);
  color: var(--paper);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 { color: var(--paper); }

.section-dark p { color: rgba(244, 241, 232, 0.75); }

.section-dark .eyebrow { color: #5fb5b2; }
.section-dark .eyebrow::before { background: #5fb5b2; }

.section-dark .serif-emph { color: #5fb5b2; }

.section-warm {
  background: var(--paper-warm);
}

.section-head {
  max-width: 720px;
  margin-bottom: 4rem;
}

.section-head h2 { max-width: 18ch; }

/* ============================================
   Premise / problem statement
   ============================================ */
.premise {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.premise-quote {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  font-style: italic;
  font-weight: 400;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.premise-quote .accent { color: var(--accent); }

.premise-detail p {
  font-size: 1.05rem;
  margin-bottom: 1.1rem;
  color: var(--ink-soft);
}

.premise-detail p:last-child { margin-bottom: 0; }

/* ============================================
   Services
   ============================================ */
.services-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.service-row {
  display: grid;
  grid-template-columns: 80px 1fr 2fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
  transition: padding 0.3s;
}

.service-row:hover { padding-left: 1rem; }

.service-num {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--accent);
  padding-top: 0.4rem;
}

.service-name h3 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  margin-bottom: 0.4rem;
}

.service-name .meta {
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}

.service-body { font-size: 1rem; }

.service-body ul {
  list-style: none;
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.service-body li {
  font-size: 0.82rem;
  padding: 0.3rem 0.7rem;
  background: var(--paper-warm);
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  color: var(--ink);
}

/* ============================================
   Sectors
   ============================================ */
.sectors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line-soft);
  background: var(--paper-warm);
}

.sector {
  padding: 1.75rem 1.5rem;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.95rem;
  color: var(--ink);
  transition: background 0.2s;
}

.sector:hover { background: var(--paper); }

.sector::before {
  content: '+ ';
  color: var(--accent);
  font-weight: 500;
}

/* ============================================
   Bio / founder section
   ============================================ */
.bio {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}

.bio-card {
  background: var(--paper);
  border: 1px solid var(--line-soft);
  padding: 2rem;
  position: sticky;
  top: 6rem;
}

.bio-card h4 {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.bio-card .name {
  font-family: var(--display);
  font-size: 1.65rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.bio-card .role {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.bio-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
}

.bio-stat .num {
  font-size: 1.65rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.bio-stat .lbl {
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-top: 0.15rem;
}

.bio-text p {
  font-size: 1.05rem;
  margin-bottom: 1.15rem;
  color: var(--ink-soft);
  max-width: 65ch;
}

.bio-text p:last-child { margin-bottom: 0; }

/* ============================================
   Track record list (projects/work)
   ============================================ */
.track-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
  border-left: 1px solid var(--line-soft);
}

.track-item {
  padding: 2rem;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.track-item .funder {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

.track-item h4 {
  font-size: 1.15rem;
  font-weight: 500;
  margin: 0;
}

.track-item p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================
   CTA strip
   ============================================ */
.cta-strip {
  padding: clamp(4rem, 7vw, 6rem) 0;
  text-align: center;
}

.cta-strip h2 {
  max-width: 22ch;
  margin: 0 auto 1.25rem;
}

.cta-strip p {
  margin: 0 auto 2rem;
  font-size: 1.1rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--ink);
  color: var(--paper);
  padding: 4.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand img { height: 32px; margin-bottom: 1.5rem; filter: brightness(0) invert(1) opacity(0.95); }

.footer-tag {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.4;
  max-width: 24ch;
  color: var(--paper);
  margin-bottom: 1.5rem;
}

.footer h5 {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  font-weight: 500;
  color: rgba(244, 241, 232, 0.5);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col a {
  font-size: 0.95rem;
  color: rgba(244, 241, 232, 0.8);
  transition: color 0.2s;
}

.footer-col a:hover { color: #5fb5b2; }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(244, 241, 232, 0.12);
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(244, 241, 232, 0.55);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ============================================
   Page header (interior pages)
   ============================================ */
.page-header {
  padding: clamp(4rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}

.page-header h1 {
  max-width: 16ch;
  margin-bottom: 1.75rem;
}

.page-header .lede {
  max-width: 56ch;
}

/* ============================================
   Approach
   ============================================ */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-soft);
  border-left: 1px solid var(--line-soft);
}

.approach-step {
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.approach-step .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.approach-step h4 {
  font-size: 1.1rem;
  margin-bottom: 0.65rem;
}

.approach-step p { font-size: 0.92rem; }

/* ============================================
   Principles (about page)
   ============================================ */
.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.principle {
  padding: 2rem;
  background: var(--paper-warm);
  border-left: 2px solid var(--accent);
}

.principle .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.principle h4 { font-size: 1.2rem; margin-bottom: 0.6rem; }
.principle p { font-size: 0.95rem; }

/* ============================================
   Publications / Insights list
   ============================================ */
.pub-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.pub-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.pub-year {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--accent);
}

.pub-title {
  font-size: 1rem;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 0.35rem;
}

.pub-venue {
  font-size: 0.85rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* ============================================
   Contact page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: start;
}

.contact-info-block {
  margin-bottom: 2.5rem;
}

.contact-info-block:last-child { margin-bottom: 0; }

.contact-info-block h4 {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.7rem;
  font-weight: 500;
}

.contact-info-block .big {
  font-size: 1.15rem;
  color: var(--ink);
  line-height: 1.5;
}

.contact-info-block a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

.form {
  background: var(--paper-warm);
  padding: 2.5rem;
  border: 1px solid var(--line-soft);
}

.form h3 { font-size: 1.4rem; margin-bottom: 1.75rem; }

.form-group { margin-bottom: 1.25rem; }

.form label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 0.45rem;
  color: var(--ink-soft);
}

.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line-soft);
  background: var(--paper);
  font-family: var(--body);
  font-size: 1rem;
  color: var(--ink);
  border-radius: 3px;
  transition: border-color 0.2s;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-color: var(--accent);
}

.form textarea { min-height: 140px; resize: vertical; font-family: var(--body); }

.form button { width: 100%; justify-content: center; margin-top: 0.5rem; }

.form-note {
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-top: 1rem;
  text-align: center;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) both; }
.fade-d1 { animation-delay: 0.08s; }
.fade-d2 { animation-delay: 0.2s; }
.fade-d3 { animation-delay: 0.32s; }
.fade-d4 { animation-delay: 0.44s; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 960px) {
  .menu-toggle { display: block; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line-soft);
    flex-direction: column;
    padding: 1.5rem var(--pad);
    gap: 1rem;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-cta { display: none; }

  .premise,
  .bio,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .bio-card { position: static; }

  .service-row {
    grid-template-columns: 60px 1fr;
    gap: 1.25rem;
  }
  .service-row .service-body { grid-column: 2; }

  .sectors { grid-template-columns: 1fr 1fr; }
  .approach-grid { grid-template-columns: 1fr 1fr; }
  .track-list { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .footer-brand { grid-column: 1 / -1; }

  .hero-watermark { width: 280px; height: 280px; right: -4rem; top: 6rem; }
}

@media (max-width: 540px) {
  .sectors { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .pub-item { grid-template-columns: 1fr; gap: 0.5rem; }
}