/* Cradle Lab - University of Michigan-Flint
   Colors: UM maize & blue */

:root {
  --um-blue: #00274c;
  --um-blue-light: #13315c;
  --um-maize: #ffcb05;
  --text-dark: #1a1a1a;
  --text-light: #5a5a5a;
  --bg-light: #f7f7f5;
  --border-color: #e0e0e0;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  background: #ffffff;
  line-height: 1.6;
}

a {
  color: var(--um-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

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

/* Header / Nav */
header.site-header {
  background: var(--um-blue);
  border-bottom: 4px solid var(--um-maize);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 0;
}

.brand-title {
  color: #ffffff;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  display: block;
  color: var(--um-maize);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

nav.main-nav a {
  display: inline-block;
  color: #ffffff;
  padding: 1rem 0.9rem;
  font-size: 0.95rem;
  font-weight: 500;
}

nav.main-nav a:hover {
  background: var(--um-blue-light);
  text-decoration: none;
}

nav.main-nav a.active {
  border-bottom: 3px solid var(--um-maize);
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--um-blue) 0%, var(--um-blue-light) 100%);
  color: #ffffff;
  padding: 3.5rem 0;
}

.hero h1 {
  font-size: 2.25rem;
  margin: 0 0 0.75rem;
}

.hero p {
  font-size: 1.1rem;
  max-width: 640px;
  color: #e6e9ee;
  margin: 0;
}

.hero .accent {
  color: var(--um-maize);
}

/* Page header for interior pages */
.page-header {
  background: var(--um-blue);
  color: #ffffff;
  padding: 2.5rem 0;
}

.page-header h1 {
  margin: 0;
  font-size: 2rem;
}

.page-header p {
  margin: 0.5rem 0 0;
  color: #cfd6de;
}

/* Main content sections */
main {
  padding: 3rem 0;
}

section + section {
  margin-top: 2.5rem;
}

h2 {
  font-size: 1.5rem;
  color: var(--um-blue);
  border-bottom: 2px solid var(--um-maize);
  padding-bottom: 0.4rem;
  margin-bottom: 1.25rem;
  display: inline-block;
}

.placeholder {
  background: #fffbe8;
  border: 1px dashed #e0c94f;
  color: #6b5b1a;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-style: italic;
}

/* Cards (people, research areas) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
}

.card h3 {
  margin: 0 0 0.35rem;
  color: var(--um-blue);
  font-size: 1.05rem;
}

.card .role {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.avatar-placeholder {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--um-blue);
  color: var(--um-maize);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

/* Publications */
.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pub-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.pub-list li:first-child {
  padding-top: 0;
}

.pub-year {
  display: inline-block;
  background: var(--um-blue);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  margin-right: 0.5rem;
}

.pub-authors {
  color: var(--text-light);
  font-size: 0.92rem;
  margin: 0.2rem 0 0;
}

.pub-venue {
  font-style: italic;
  color: var(--text-light);
  font-size: 0.92rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

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

.contact-item {
  margin-bottom: 1rem;
}

.contact-label {
  font-weight: 700;
  color: var(--um-blue);
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* News list on homepage */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border-color);
}

.news-date {
  color: var(--text-light);
  font-size: 0.85rem;
  display: block;
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--um-maize);
  color: var(--um-blue);
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  border-radius: 4px;
  margin-top: 1rem;
}

.btn:hover {
  background: #e6b800;
  text-decoration: none;
}

/* Footer */
footer.site-footer {
  background: var(--um-blue);
  color: #cfd6de;
  padding: 2rem 0;
  margin-top: 3rem;
  font-size: 0.9rem;
}

footer.site-footer a {
  color: var(--um-maize);
}

footer .footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  padding: 0.75rem;
  cursor: pointer;
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  nav.main-nav {
    width: 100%;
    display: none;
  }

  nav.main-nav.open {
    display: block;
  }

  nav.main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  nav.main-nav a {
    padding: 0.75rem 0;
    width: 100%;
  }

  .header-inner {
    padding-bottom: 0.5rem;
  }
}