:root{
  --maxw: 1050px;

  /* Background overlay */
  --overlay: rgba(8, 12, 18, 0.62);

  /* Surfaces */
  --card: rgba(255,255,255,0.94);

  /* Text */
  --text: #0b1220;
  --muted: #4b5563;

  /* Caltech-ish accents */
  --caltech-orange: #ff6a00;
  --caltech-orange-hover: #ff8a2a;
  --caltech-orange-soft: rgba(255,106,0,0.18);
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }

body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: #fff;
  background:
    linear-gradient(var(--overlay), var(--overlay)),
    url("assets/merkin-center.jpg") center/cover no-repeat fixed;
}

/* Links: Caltech orange everywhere */
a{
  color: var(--caltech-orange);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}
a:visited{
  color: var(--caltech-orange);
}
a:hover, a:focus-visible{
  color: var(--caltech-orange-hover);
  text-decoration-thickness: 3px;
}

/* Layout containers */
.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 18px;
}

.header{
  padding: 18px 0 8px 0;
}

.topbar{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.brand{
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Navigation */
.nav{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a{
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  text-decoration: none; /* looks cleaner for nav */
  color: var(--caltech-orange);
  border: 1px solid rgba(255,255,255,0.45);
  background: rgba(255,255,255,0.08);
}

.nav a:hover, .nav a:focus-visible{
  background: var(--caltech-orange-soft);
  border-color: rgba(255,106,0,0.75);
  outline: none;
}

.nav a[aria-current="page"]{
  background: rgba(255,106,0,0.24);
  border-color: rgba(255,106,0,0.85);
}

/* Caltech logo slot (bigger) */
.logo-slot{
  width: 240px;
  min-width: 180px;
  display: flex;
  justify-content: flex-end;
}

/* Keep logo unmanipulated (no shadow/filters) per guidelines [[2]] */
.logo-slot img{
  max-width: 240px;
  max-height: 90px;
  object-fit: contain;
  border-radius: 8px; /* safe: does not alter artwork itself; remove if you want strictest handling */
}

.logo-placeholder{
  width: 240px;
  height: 90px;
  border: 1px dashed rgba(255,255,255,0.55);
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: rgba(255,255,255,0.85);
  font-size: 12px;
  text-align: center;
  padding: 6px;
}

/* Hero */
.hero{
  padding: 14px 0 22px 0;
}

.hero h1{
  margin: 8px 0 10px 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.12;
}

.hero .subtitle{
  margin: 0;
  max-width: 85ch;
  color: rgba(255,255,255,0.92);
}

.badges{
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge{
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.95);
  font-size: 13px;
}

/* Main area */
.main{
  padding: 0 0 28px 0;
}

.grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 900px){
  .grid{ grid-template-columns: 1.2fr 0.8fr; }
}

/* Cards */
.card{
  background: var(--card);
  color: var(--text);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}

.card h2{
  margin: 0 0 10px 0;
  font-size: 20px;
}

.muted{ color: var(--muted); }
.small{ font-size: 13px; }

.list{
  margin: 8px 0 0 18px;
  padding: 0;
}

.list li{ margin: 7px 0; }

/* Ensure links remain Caltech orange inside cards too */
.card a{
  color: var(--caltech-orange);
}
.card a:hover, .card a:focus-visible{
  color: var(--caltech-orange-hover);
}

/* Tables */
.table{
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
}

.table th, .table td{
  padding: 10px;
  border-bottom: 1px solid rgba(17,24,39,0.10);
  vertical-align: top;
}

.table th{
  text-align: left;
  font-size: 13px;
  background: rgba(17,24,39,0.05);
}

/* Keep table links orange */
.table td a{
  color: var(--caltech-orange);
}
.table td a:hover, .table td a:focus-visible{
  color: var(--caltech-orange-hover);
}

/* Divider + footer */
.hr{
  height: 1px;
  background: rgba(255,255,255,0.18);
  margin: 14px 0;
}

.footer{
  padding: 12px 0 26px 0;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
}