:root {
  --dps-green-primary: #0f2f26;
  --dps-green-deep: #0a221c;
  --dps-green-surface: #163d33;
  --dps-gold-accent: #c6a75e;
  --dps-gold-soft: #d4b87a;
  --dps-gold-muted: #9f8447;
  --dps-ivory: #f2f1ed;
  --dps-ivory-soft: #e7e4dc;
  --dps-shadow-deep: rgba(0, 0, 0, 0.45);
  --dps-shadow-soft: rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--dps-ivory);
  font-family: "Public Sans", sans-serif;
  background:
    radial-gradient(circle at 88% 9%, rgba(198, 167, 94, 0.14), transparent 30%),
    linear-gradient(180deg, #0a221c 0%, #0f2f26 46%, #163d33 100%);
}

.skip-link {
  position: absolute;
  left: 0.8rem;
  top: -3rem;
  background: var(--dps-gold-accent);
  color: #10211c;
  padding: 0.45rem 0.7rem;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0.8rem;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 0.76rem 1.2rem;
  background: rgba(10, 34, 28, 0.82);
  border-bottom: 1px solid rgba(198, 167, 94, 0.34);
}

.brand {
  color: var(--dps-ivory-soft);
  text-decoration: none;
  font-family: "Prata", serif;
  letter-spacing: 0.04em;
  font-size: 0.95rem;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(198, 167, 94, 0.38);
  background: transparent;
  color: var(--dps-ivory);
  padding: 0.35rem 0.55rem;
}

nav {
  display: flex;
  gap: 0.72rem;
  flex-wrap: wrap;
  justify-content: center;
}

nav a,
.secure-login {
  color: var(--dps-ivory);
  text-decoration: none;
  font-size: 0.84rem;
  border: 1px solid transparent;
  padding: 0.25rem 0.45rem;
}

nav a:hover,
nav a.active,
.secure-login:hover {
  border-color: var(--dps-gold-muted);
  color: var(--dps-gold-soft);
}

main {
  width: min(1160px, 95vw);
  margin: 1.65rem auto 2.7rem;
}

.academic-header {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(198, 167, 94, 0.3);
  background:
    radial-gradient(circle at 20% 18%, rgba(212, 184, 122, 0.16), transparent 40%),
    radial-gradient(circle at 82% 12%, rgba(154, 227, 200, 0.12), transparent 38%),
    rgba(10, 34, 28, 0.55);
  padding: 1.25rem 1.1rem;
  box-shadow: 0 22px 34px var(--dps-shadow-deep);
}

.academic-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(212, 184, 122, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 184, 122, 0.06) 1px, transparent 1px);
  background-size: 58px 58px;
  opacity: 0.45;
  mix-blend-mode: screen;
  pointer-events: none;
}

.academic-header > * {
  position: relative;
  z-index: 1;
}

.academic-header p:first-child {
  margin: 0;
  color: var(--dps-gold-soft);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
}

.academic-header h1 {
  margin: 0.45rem 0 0.5rem;
  font-family: "Prata", serif;
  font-size: clamp(1.95rem, 4.2vw, 3.1rem);
}

.academic-header p {
  margin: 0;
  line-height: 1.7;
  color: var(--dps-ivory-soft);
}

.academic-tools {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.7rem;
  align-items: end;
}

.academic-tools label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.88rem;
  color: var(--dps-ivory-soft);
}

.academic-tools input,
.academic-tools button {
  border: 1px solid rgba(198, 167, 94, 0.34);
  background: rgba(10, 34, 28, 0.75);
  color: var(--dps-ivory);
  padding: 0.45rem 0.6rem;
}

.academic-tools button {
  cursor: pointer;
}

.academic-tools button:hover {
  background: rgba(198, 167, 94, 0.18);
}

#facultyCount {
  margin: 0;
  color: var(--dps-gold-soft);
  font-size: 0.88rem;
}

.academic-layout {
  margin-top: 0.95rem;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 0.9rem;
}

.dept-nav {
  position: sticky;
  top: 5rem;
  align-self: start;
  border: 1px solid rgba(198, 167, 94, 0.3);
  background: rgba(22, 61, 51, 0.65);
  display: grid;
  gap: 0.35rem;
  padding: 0.55rem;
}

.dept-btn {
  border: 1px solid transparent;
  background: transparent;
  color: var(--dps-ivory);
  text-align: left;
  padding: 0.5rem;
  cursor: pointer;
  transition: all 240ms ease;
  position: relative;
  overflow: hidden;
}

.dept-btn::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: translateX(-110%);
  background: linear-gradient(90deg, transparent, rgba(212, 184, 122, 0.85), rgba(154, 227, 200, 0.6), transparent);
  transition: transform 260ms ease;
  opacity: 0.85;
}

.dept-btn.active,
.dept-btn:hover,
.dept-btn:focus-visible {
  border-color: var(--dps-gold-accent);
  color: var(--dps-gold-soft);
}

.dept-btn.active::after,
.dept-btn:hover::after,
.dept-btn:focus-visible::after {
  transform: translateX(0);
}

.dept-content {
  border: 1px solid rgba(198, 167, 94, 0.3);
  background: rgba(10, 34, 28, 0.65);
  min-height: 26rem;
}

.dept-panel {
  display: none;
  padding: 1rem;
}

.dept-panel.active {
  display: block;
  animation: revealPanel 520ms ease;
}

.dept-panel h2 {
  margin: 0 0 0.7rem;
  font-family: "Prata", serif;
  color: var(--dps-gold-soft);
}

.dept-intro {
  margin: -0.25rem 0 0.9rem;
  color: rgba(242, 241, 237, 0.86);
  line-height: 1.65;
  max-width: 72ch;
}

.teacher-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.8rem;
}

.teacher-card {
  --mx: 50%;
  --my: 50%;
  border: 1px solid rgba(198, 167, 94, 0.25);
  background: linear-gradient(180deg, rgba(22, 61, 51, 0.9), rgba(15, 47, 38, 0.95));
  padding: 0.7rem;
  transition: transform 260ms ease, box-shadow 260ms ease;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.teacher-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(circle at var(--mx) var(--my), rgba(212, 184, 122, 0.22), transparent 56%);
  transition: opacity 240ms ease;
  pointer-events: none;
}

.teacher-card::after {
  content: "";
  position: absolute;
  inset: -40% -10%;
  background: linear-gradient(90deg, transparent, rgba(154, 227, 200, 0.14), rgba(212, 184, 122, 0.12), transparent);
  transform: rotate(8deg) translateX(-35%);
  opacity: 0;
  transition: opacity 260ms ease;
  pointer-events: none;
}

.teacher-card.hide-by-search {
  display: none;
}

.teacher-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 24px var(--dps-shadow-soft);
}

.teacher-card:hover::before,
.teacher-card:focus-within::before {
  opacity: 1;
}

.teacher-card:hover::after,
.teacher-card:focus-within::after {
  opacity: 1;
}

.teacher-card img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 320px;
  margin: 0 auto;
  object-fit: contain;
  object-position: center;
  background: transparent;
  padding: 0;
  border: 1px solid rgba(198, 167, 94, 0.26);
  border-radius: 0.3rem;
  transform: translateZ(14px);
}

.teacher-card p {
  margin: 0.35rem 0;
  color: var(--dps-ivory-soft);
  font-size: 0.9rem;
  line-height: 1.5;
}

.academic-delivery-matrix {
  margin-top: 1rem;
  border: 1px solid rgba(198, 167, 94, 0.3);
  background:
    radial-gradient(circle at 14% 12%, rgba(212, 184, 122, 0.14), transparent 44%),
    linear-gradient(160deg, rgba(18, 52, 45, 0.92), rgba(9, 33, 28, 0.96));
  padding: 1rem;
}

.academic-delivery-matrix header p {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.17em;
  font-size: 0.72rem;
  color: rgba(154, 227, 200, 0.9);
}

.academic-delivery-matrix header h2 {
  margin: 0.45rem 0 0;
  color: var(--dps-gold-soft);
  font-family: "Prata", serif;
  font-size: clamp(1.35rem, 2.7vw, 1.95rem);
}

.delivery-grid {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.delivery-card {
  border: 1px solid rgba(198, 167, 94, 0.26);
  background: linear-gradient(180deg, rgba(22, 61, 51, 0.88), rgba(15, 47, 38, 0.95));
  padding: 0.85rem;
}

.delivery-card h3 {
  margin: 0;
  font-family: "Prata", serif;
  color: #f2e4bc;
  font-size: 1rem;
}

.delivery-card p {
  margin: 0.48rem 0 0;
  line-height: 1.58;
  color: var(--dps-ivory-soft);
}

@keyframes revealPanel {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reduced-motion * {
  transition: none !important;
  animation: none !important;
}

@media (max-width: 1080px) {
  .top-nav {
    grid-template-columns: auto 1fr auto;
  }

  .nav-toggle {
    display: inline-block;
    justify-self: end;
  }

  nav {
    grid-column: 1 / -1;
    display: none;
    justify-content: flex-start;
  }

  nav.open {
    display: flex;
  }

  .academic-layout {
    grid-template-columns: 1fr;
  }

  .dept-nav {
    position: static;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  }

  .delivery-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 840px) {
  .academic-tools {
    grid-template-columns: 1fr;
  }
}