:root{
  --blue:#0d6f98;
  --blue-dark:#075474;
  --text:#333;
  --muted:#666;
  --line:#d8d8d8;
  --bg:#f5f5f5;
  --white:#fff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:1.55
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

.site-header{
  min-height:128px;
  position:relative;
  display:flex;
  align-items:flex-end;

  background-image:url("https://vanderhamnmr.com/images/Ethanol_banner.jpg");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;

  color:#fff;
}

.header-inner{
  width:min(1100px,94%);
  margin:0 auto;
  padding:24px 0 18px;
  position:relative;
  z-index:1;
  text-align:center;
}

.brand{
  font-size:28px;
  font-weight:400;
  letter-spacing:.5px;
  text-align:center;
}

.brand a{
  color:#fff;
}

.tagline{
  font-size:13px;
  color:#ddd;
  margin-top:2px;
  text-align:center;
}

.nav{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:0;
  margin-top:18px;
  text-align:center;
}

.nav a,
.nav details>summary{
  color:#fff;
  padding:7px 12px;
  font-size:13px;
  cursor:pointer;
  list-style:none;
}

.nav a:hover,
.nav details>summary:hover{
  background:#222;
  text-decoration:none;
}

.nav details{
  position:relative;
}

.nav details[open] summary{
  background:#222;
}

.nav .dropdown{
  position:absolute;
  z-index:20;
  top:100%;
  left:0;
  min-width:180px;
  background:#111;
  border:1px solid #333;
  box-shadow:0 8px 20px rgba(0,0,0,.35);
}

.nav .dropdown a{
  display:block;
}

.container{width:min(1040px,92%);margin:0 auto}
main{padding:36px 0 60px}
.hero{
  max-width:850px;margin:0 auto 28px;text-align:center
}
.hero h1{font-size:26px;font-weight:400;color:#14739a;margin:0 0 12px}
.hero .lead{font-size:16px;margin:0 auto 16px;max-width:700px}
.hero p:not(.lead){text-align:justify;}
.card-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:28px auto;max-width:900px
}
.card{
  background:#fff;border:1px solid #ddd;box-shadow:0 1px 2px rgba(0,0,0,.05);
  text-align:center;padding:0 0 12px
}
.card img{width:100%;height:150px;object-fit:cover;display:block}
.card .icon{height:150px;object-fit:contain;background:#fff}
.card a{display:block;padding:10px 5px 0;font-size:13px}
.section{
  background:#fff;border:1px solid #ddd;padding:28px 34px;margin:20px auto;max-width:1000px
}
.section h2{font-size:20px;font-weight:400;color:#14739a;margin:0 0 18px}
.section h3{font-size:16px;font-weight:600;color:#14739a;margin:25px 0 8px}
.section p{margin:8px 0;text-align:justify}
.banner{
  position:relative;overflow:hidden;min-height:260px;margin:-36px 0 30px;
  background:#ddd
}
.banner img{width:100%;height:300px;object-fit:cover;display:block;filter:brightness(.78)}
.banner .overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.banner h1{color:#fff;font-size:34px;font-weight:400;text-shadow:0 2px 5px #000}
.columns{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.timeline .item{display:grid;grid-template-columns:190px 1fr;gap:20px;padding:13px 0;border-bottom:1px solid #ddd}
.timeline .date{font-weight:600;color:#444}
.pub{padding:12px 0;border-bottom:1px solid #ddd}
.pub .year{font-weight:700;color:#14739a}
.pub .title{font-weight:600}
.pub .authors{font-size:14px}
.pub .journal{font-size:13px;color:#666}
.badge{display:inline-block;padding:2px 8px;background:#eee;border-radius:10px;font-size:12px}
.cv-header{
  display:grid;grid-template-columns:160px 1fr 220px;gap:24px;align-items:center
}
.cv-header img{width:160px;height:205px;object-fit:cover}
.cv-header .name{font-size:25px;color:#14739a}
.cv-header .role{font-size:15px}
.cv-header .map{width:100%;height:150px;object-fit:cover}
.table-img{max-width:100%;display:block;margin:15px auto}
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.project{background:#fff;border:1px solid #ddd;padding:14px}
.project img{width:100%;height:170px;object-fit:cover}
.project h3{font-size:15px;margin:10px 0 5px;color:#14739a}
footer{border-top:1px solid #ddd;background:#fff;color:#777;text-align:center;padding:25px 10px;font-size:12px}
.small{font-size:13px;color:#666}
.center{text-align:center}
@media(max-width:800px){
  .card-grid,.project-grid{grid-template-columns:repeat(2,1fr)}
  .columns{grid-template-columns:1fr}
  .cv-header{grid-template-columns:120px 1fr}
  .cv-header .map{display:none}
}
@media(max-width:560px){
  .site-header{min-height:0}
  .brand{font-size:22px}
  .nav a,.nav details>summary{padding:7px 8px;font-size:12px}
  .card-grid,.project-grid{grid-template-columns:1fr}
  .timeline .item{grid-template-columns:1fr;gap:2px}
  .section{padding:20px}
  .banner{margin:-36px 0 22px}
  .banner img{height:220px}
  .cv-header{grid-template-columns:1fr;text-align:center}
  .cv-header img{margin:auto}
}