/* Kuntz Lab — Vanderbilt University
   Custom stylesheet (Bootstrap 5 base)
   Vanderbilt palette: Gold #CEB888 / Dark gold #866D4B / Black #1A1A1A
*/

:root {
  --vu-gold: #CEB888;
  --vu-gold-dark: #866D4B;
  --vu-black: #1A1A1A;
  --vu-gray: #f8f8f6;
}

/* ── Typography ────────────────────────────── */
body {
  font-family: 'Open Sans', sans-serif;
  color: #333;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Oswald', sans-serif;
  font-weight: 300;
}

.section-title {
  font-size: 1.8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--vu-black);
  margin-bottom: 0.5rem;
}

.section-divider {
  width: 55px;
  height: 3px;
  background: var(--vu-gold);
  margin-bottom: 1.75rem;
}

/* ── Navbar ─────────────────────────────────── */
.navbar {
  background-color: var(--vu-black) !important;
  padding: 0.75rem 0;
}

.navbar-brand {
  font-family: 'Oswald', sans-serif;
  font-size: 1.35rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--vu-gold) !important;
}

.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.8rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  transition: color 0.2s;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link.active {
  color: var(--vu-gold) !important;
}

/* ── Hero ────────────────────────────────────── */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.62), rgba(0, 0, 0, 0.62)),
    url('../images/banner.jpg') center / cover no-repeat;
  color: #fff;
  padding: 130px 0 110px;
  text-align: center;
}

.hero h1 {
  font-size: 3.6rem;
  font-weight: 300;
  letter-spacing: 10px;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 0.3rem;
}

.hero .lab-subtitle {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  color: var(--vu-gold);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero .lab-tagline {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 580px;
  margin: 0 auto 2rem;
}

/* ── Page header banner (inner pages) ──────── */
.page-header-banner {
  background: var(--vu-black);
  padding: 52px 0 44px;
}

.page-header-banner h2 {
  font-size: 2rem;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--vu-gold);
  margin-bottom: 0.4rem;
}

.page-header-banner p {
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 1px;
  font-size: 0.9rem;
}

/* ── Buttons ─────────────────────────────────── */
.btn-gold {
  background-color: var(--vu-gold);
  border-color: var(--vu-gold);
  color: var(--vu-black);
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.btn-gold:hover {
  background-color: var(--vu-gold-dark);
  border-color: var(--vu-gold-dark);
  color: #fff;
}

.btn-outline-gold {
  border-color: var(--vu-gold);
  color: var(--vu-gold);
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.btn-outline-gold:hover {
  background-color: var(--vu-gold);
  color: var(--vu-black);
}

/* ── Research cards ──────────────────────────── */
.research-card {
  border: none;
  border-top: 3px solid var(--vu-gold);
  border-radius: 0;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.3s;
}

.research-card:hover {
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.13);
}

.research-card .card-icon {
  font-size: 2.4rem;
  color: var(--vu-gold);
  margin-bottom: 1rem;
}

.research-card .learn-more {
  color: var(--vu-gold-dark);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}

.research-card .learn-more:hover {
  color: var(--vu-gold);
}

/* ── People cards ────────────────────────────── */
.people-card {
  text-align: center;
  border: none;
  background: transparent;
}

.people-card img {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--vu-gold);
  margin-bottom: 1rem;
}

.people-card .member-placeholder {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 4px solid var(--vu-gold);
  background: #e8e4dc;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 2.5rem;
  color: var(--vu-gold-dark);
}

/* ── Section bg alternation ──────────────────── */
.bg-lab-gray {
  background-color: var(--vu-gray);
}

/* ── Utility ─────────────────────────────────── */
.text-gold {
  color: var(--vu-gold-dark) !important;
}

.border-gold {
  border-color: var(--vu-gold) !important;
}

/* ── Research section anchors ────────────────── */
.research-section {
  padding: 72px 0;
}

.research-section .research-icon {
  font-size: 2.8rem;
  color: var(--vu-gold);
  margin-bottom: 1rem;
}

/* ── Publication list ────────────────────────── */
.pub-item {
  border-left: 3px solid var(--vu-gold);
  padding: 0.75rem 1rem 0.75rem 1.25rem;
  margin-bottom: 1.2rem;
  background: #fff;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
}

.pub-item .pub-title {
  font-weight: 600;
  color: var(--vu-black);
}

.bold-no-underline-black {
  font-weight: 600;
  color: var(--vu-black);
  text-decoration: none;
}

.bold-no-underline-black:hover {
  color: var(--vu-black);
  text-decoration: underline;
}

.pub-item .pub-venue {
  font-style: italic;
  color: #666;
  font-size: 0.9rem;
}

/* ── Footer ──────────────────────────────────── */
footer {
  background: var(--vu-black);
  color: rgba(255, 255, 255, 0.72);
  padding: 54px 0 20px;
}

footer h5 {
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--vu-gold);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

footer p,
footer li {
  font-size: 0.9rem;
  line-height: 1.8;
}

footer a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--vu-gold);
}

footer hr {
  border-color: rgba(255, 255, 255, 0.1);
  margin: 36px 0 20px;
}

footer .footer-bottom {
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.82rem;
}