/* ============================================================
   Institute for Human Evolution — Site Styles
   ============================================================ */

:root {
  --navy:        #1F3A5F;
  --navy-dark:   #142847;
  --navy-light:  #2E5984;
  --sand:        #C8A875;
  --sand-light:  #E8D9B8;
  --ink:         #1A1A1A;
  --charcoal:    #333333;
  --slate:       #555555;
  --mute:        #808080;
  --line:        #D8D8D8;
  --paper:       #FBFAF7;
  --paper-2:     #F5F2EC;
  --white:       #FFFFFF;
  --max:         1100px;
  --max-narrow:  780px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--charcoal);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* Headings */
h1, h2, h3, h4 {
  font-family: 'Cormorant Garamond', 'Playfair Display', Georgia, 'Times New Roman', serif;
  color: var(--navy);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em 0;
}

h1 { font-size: 2.6rem; line-height: 1.15; }
h2 { font-size: 2.0rem; line-height: 1.2; margin-top: 1.8em; }
h3 { font-size: 1.35rem; line-height: 1.3; margin-top: 1.6em; color: var(--navy-light); }
h4 { font-size: 1.05rem; font-family: 'Inter', sans-serif; text-transform: uppercase; letter-spacing: 0.12em; color: var(--slate); margin-top: 1.4em; }

p { margin: 0 0 1.1em 0; }

a {
  color: var(--navy-light);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
  transition: color 0.18s ease, border-color 0.18s ease;
}
a:hover { color: var(--navy); border-bottom-color: var(--navy); }

ul, ol { padding-left: 1.3em; margin: 0 0 1.2em 0; }
li { margin-bottom: 0.45em; }

blockquote {
  margin: 1.6em 0;
  padding: 0.2em 0 0.2em 1.5em;
  border-left: 3px solid var(--sand);
  font-style: italic;
  color: var(--slate);
  font-size: 1.05em;
}

hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 3em 0;
}

/* Layout */
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.narrow    { max-width: var(--max-narrow); margin: 0 auto; padding: 0 1.5rem; }

section { padding: 4rem 0; }
section.tight { padding: 2.5rem 0; }

/* ============================================================
   Header / Nav
   ============================================================ */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.brand {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy);
  border: none;
  letter-spacing: 0.02em;
  line-height: 1.15;
}
.brand-mark {
  display: inline-block;
  margin-right: 0.6rem;
  color: var(--sand);
  font-weight: 700;
}
.brand small {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--mute);
  text-transform: uppercase;
  font-weight: 500;
  margin-top: 0.1em;
}
nav.primary {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}
nav.primary a {
  color: var(--charcoal);
  border: none;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
}
nav.primary a:hover,
nav.primary a.active {
  color: var(--navy);
  border-bottom-color: var(--sand);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--navy);
  cursor: pointer;
  padding: 0.2rem 0.5rem;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  padding: 6rem 0 5rem;
  border-bottom: 1px solid var(--line);
}
.hero .eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--sand);
  font-weight: 600;
  margin-bottom: 1.2rem;
}
.hero h1 {
  font-size: 3.4rem;
  line-height: 1.08;
  max-width: 760px;
  margin-bottom: 1.2rem;
}
.hero .lede {
  font-size: 1.25rem;
  color: var(--slate);
  max-width: 660px;
  line-height: 1.55;
  margin-bottom: 2rem;
}
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  background: var(--navy);
  color: var(--white);
  border: 1px solid var(--navy);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 2px;
  transition: all 0.2s ease;
}
.btn:hover { background: var(--navy-dark); color: var(--white); border-color: var(--navy-dark); }
.btn.outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn.outline:hover { background: var(--navy); color: var(--white); }

/* ============================================================
   Page header (interior pages)
   ============================================================ */
.page-header {
  background: var(--navy);
  color: var(--white);
  padding: 4.5rem 0 3.5rem;
}
.page-header .eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--sand);
  font-weight: 600;
  margin-bottom: 1rem;
}
.page-header h1 {
  color: var(--white);
  font-size: 2.8rem;
  margin: 0 0 1rem 0;
  max-width: 800px;
}
.page-header p {
  color: rgba(255,255,255,0.85);
  font-size: 1.15rem;
  max-width: 720px;
  margin: 0;
}

/* ============================================================
   Cards & grids
   ============================================================ */
.grid {
  display: grid;
  gap: 1.5rem;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 2rem 1.8rem;
  border-radius: 2px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--sand); }
.card .num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2rem;
  color: var(--sand);
  font-weight: 600;
  line-height: 1;
  margin-bottom: 0.7rem;
}
.card h3 { margin-top: 0; }
.card p { color: var(--slate); margin-bottom: 0; }
.card a.card-link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  border: none;
  color: var(--navy);
}
.card a.card-link::after {
  content: " →";
  transition: margin-left 0.2s ease;
}
.card a.card-link:hover::after { margin-left: 0.3em; }

/* Pillar callout list */
.pillar-list {
  list-style: none;
  padding: 0;
  margin: 1.5em 0;
}
.pillar-list li {
  padding: 1.2rem 0 1.2rem 3rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  counter-increment: pillar;
}
.pillar-list li::before {
  content: counter(pillar);
  position: absolute;
  left: 0;
  top: 1.1rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  color: var(--sand);
  font-weight: 600;
  width: 2rem;
}
.pillar-list { counter-reset: pillar; }
.pillar-list strong { color: var(--navy); display: block; margin-bottom: 0.2em; font-size: 1.08rem; }

/* ============================================================
   Pull-quote / Statement
   ============================================================ */
.statement {
  background: var(--paper-2);
  border-left: 4px solid var(--sand);
  padding: 2.5rem 2.5rem;
  margin: 3rem 0;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.6rem;
  line-height: 1.4;
  color: var(--navy);
  font-style: italic;
}

/* ============================================================
   Section variants
   ============================================================ */
.bg-paper-2 { background: var(--paper-2); }
.bg-navy    { background: var(--navy); color: rgba(255,255,255,0.92); }
.bg-navy h2, .bg-navy h3, .bg-navy h4 { color: var(--white); }
.bg-navy .eyebrow { color: var(--sand); }
.bg-navy a { color: var(--sand-light); border-bottom-color: var(--sand); }

.section-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--sand);
  font-weight: 600;
  margin-bottom: 1rem;
  display: block;
}

/* ============================================================
   Boundary / disclosure boxes
   ============================================================ */
.disclosure {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy);
  padding: 1.6rem 1.8rem;
  margin: 2rem 0;
  font-size: 0.97rem;
}
.disclosure h4 {
  margin-top: 0;
  color: var(--navy);
}
.disclosure p:last-child { margin-bottom: 0; }

/* ============================================================
   Tables
   ============================================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.96rem;
}
th, td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: var(--navy);
  color: var(--white);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: 0.88rem;
  text-transform: uppercase;
}
tr:nth-child(even) td { background: var(--paper-2); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.75);
  padding: 4rem 0 2rem;
  margin-top: 0;
}
.site-footer h4 {
  color: var(--sand);
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.site-footer a {
  color: rgba(255,255,255,0.8);
  border: none;
  display: block;
  padding: 0.25rem 0;
  font-size: 0.95rem;
}
.site-footer a:hover { color: var(--sand); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-brand {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 0.6rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 1.5rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ============================================================
   Forms (contact)
   ============================================================ */
form .field { margin-bottom: 1.2rem; }
form label {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  font-weight: 500;
  margin-bottom: 0.4rem;
}
form input, form select, form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: inherit;
  font-size: 1rem;
  color: var(--charcoal);
  border-radius: 2px;
}
form input:focus, form textarea:focus, form select:focus {
  outline: none;
  border-color: var(--navy);
}
form textarea { min-height: 160px; resize: vertical; }

/* ============================================================
   Utility
   ============================================================ */
.text-center { text-align: center; }
.muted { color: var(--mute); }
.small { font-size: 0.92rem; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 880px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 2.1rem; }
  .hero h1 { font-size: 2.4rem; }
  .page-header h1 { font-size: 2.1rem; }
  .statement { font-size: 1.3rem; padding: 1.8rem; }

  nav.primary {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.6rem;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 6px 16px rgba(0,0,0,0.04);
  }
  nav.primary.open { display: flex; }
  nav.primary a { padding: 0.6rem 0; border-bottom: 1px solid var(--line); }
  nav.primary a:last-child { border-bottom: none; }
  .mobile-toggle { display: block; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  section { padding: 3rem 0; }
  .hero { padding: 3.5rem 0; }
}