:root {
  --burgundy: #7B1E2B;
  --rose: #C33E52;
  --gold: #F6D46A;
  --ink: #101010;
  --muted: rgba(255,255,255,0.75);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: #fff;
  background: radial-gradient(1200px 800px at 80% -20%, rgba(195,62,82,0.25), transparent),
              linear-gradient(120deg, #0b0b0f, #201019 40%, #3d0f19 70%, #10050a 100%);
  min-height: 100vh;
}

.group-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.group-hero {
  text-align: center;
  padding: 60px 20px 40px;
  max-width: 720px;
  margin: 0 auto;
  animation: hero-pop 0.9s ease 0.2s both;
}

.group-hero img {
  height: 72px;
  margin: 0 auto 18px;
  display: block;
  filter: drop-shadow(0 15px 35px rgba(0,0,0,0.4));
}

.group-hero h1 {
  font-family: 'Manrope', 'Inter', sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.group-hero p {
  color: var(--muted);
  font-size: 1.05rem;
}

.group-panels {
  flex: 1;
  display: flex;
  min-height: 60vh;
  gap: 0;
  margin: 0 20px 40px;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(5,5,7,0.55);
}

.division {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  align-items: flex-end;
  padding: 32px;
  text-decoration: none;
  color: #fff;
  overflow: hidden;
  transition: flex 0.55s cubic-bezier(.23,1,.32,1), filter 0.45s ease, transform 0.45s ease;
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.division::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, rgba(5,5,7,0.35), rgba(5,5,7,0.8));
  z-index: -1;
  transition: background 0.4s ease, opacity 0.4s ease;
}

.division::after {
  content: '';
  position: absolute;
  top: -40%;
  bottom: -40%;
  right: -25px;
  width: 60px;
  background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.05));
  transform: rotate(18deg);
  pointer-events: none;
  opacity: .45;
  mix-blend-mode: screen;
  z-index: 1;
}

.division::after {
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.division-content {
  position: relative;
  max-width: 260px;
  z-index: 2;
}

.division span.label {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.7rem;
  margin-bottom: 12px;
  color: var(--gold);
}

.division h2 {
  font-family: 'Manrope', 'Inter', sans-serif;
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.division p {
  color: var(--muted);
  line-height: 1.5;
}

.division-content {
  transition: transform 0.4s ease, opacity 0.4s ease;
}

.division::selection,
.division *::selection {
  background: var(--gold);
  color: #1a0b0e;
}

.division-passenger { --active-image: url('images/aur.png'); background-image: linear-gradient(120deg, rgba(123,30,43,0.35), rgba(12,3,6,0.75)), var(--active-image); }
.division-student { --active-image: url('images/schools.png'); background-image: linear-gradient(120deg, rgba(240,201,79,0.4), rgba(12,3,6,0.8)), var(--active-image); }
.division-engineering { --active-image: url('images/maintenance1.png'); background-image: linear-gradient(120deg, rgba(5,5,7,0.4), rgba(16,7,9,0.85)), var(--active-image); }
.division-sales { --active-image: url('images/candbsales.png'); background-image: linear-gradient(120deg, rgba(36,52,90,0.4), rgba(10,10,16,0.85)), var(--active-image); }
.group-panels[data-active] .division {
  background-blend-mode: multiply;
}
.group-panels[data-active="1"] .division:nth-child(1),
.group-panels[data-active="2"] .division:nth-child(2),
.group-panels[data-active="3"] .division:nth-child(3),
.group-panels[data-active="4"] .division:nth-child(4) {
  background-image: var(--active-image);
  background-blend-mode: normal;
}

.group-panels[data-active] .division {
  flex: 0.55;
  filter: grayscale(0.6);
  transform: translateX(0);
}
.group-panels[data-active] .division::before {
  background: linear-gradient(145deg, rgba(5,5,7,0.5), rgba(5,5,7,0.9));
}
.group-panels[data-active] .division::after {
  opacity: 0.2;
}

.group-panels[data-active="1"] .division:nth-child(1),
.group-panels[data-active="2"] .division:nth-child(2),
.group-panels[data-active="3"] .division:nth-child(3),
.group-panels[data-active="4"] .division:nth-child(4) {
  flex: 3;
  filter: grayscale(0);
  transform: translateX(0);
  background-image: linear-gradient(120deg, rgba(5,5,7,0), rgba(5,5,7,0)), var(--active-image, none);
}
.group-panels[data-active="1"] .division:nth-child(n+2),
.group-panels[data-active="2"] .division:nth-child(n+3),
.group-panels[data-active="3"] .division:nth-child(n+4),
.group-panels[data-active="2"] .division:nth-child(1),
.group-panels[data-active="3"] .division:nth-child(-n+2),
.group-panels[data-active="4"] .division:nth-child(-n+3) {
  transform: translateX(0);
}
.group-panels[data-active] .division-content {
  transform: translateY(0);
  max-width: 200px;
  width: 100%;
  opacity: 0.7;
}
.group-panels[data-active="1"] .division:nth-child(1) .division-content,
.group-panels[data-active="2"] .division:nth-child(2) .division-content,
.group-panels[data-active="3"] .division:nth-child(3) .division-content,
.group-panels[data-active="4"] .division:nth-child(4) .division-content {
  transform: translateY(-8px);
  max-width: clamp(320px, 45vw, 520px);
  opacity: 1;
}
.group-panels[data-active] .division p {
  color: rgba(255,255,255,0.7);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.group-panels[data-active="1"] .division:nth-child(1) p,
.group-panels[data-active="2"] .division:nth-child(2) p,
.group-panels[data-active="3"] .division:nth-child(3) p,
.group-panels[data-active="4"] .division:nth-child(4) p {
  color: rgba(255,255,255,0.95);
  opacity: 1;
}

.group-panels:focus-within .division {
  flex: 0.55;
  filter: grayscale(0.6);
}
.division:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -4px;
}


.group-footer {
  text-align: center;
  padding: 30px 20px 40px;
  font-size: 0.95rem;
  color: var(--muted);
}

.group-footer a {
  color: #fff;
  font-weight: 600;
}

@media (max-width: 960px) {
  .group-panels {
    flex-direction: column;
  }
  .division {
    min-height: 45vh;
  }
  .group-panels:hover .division,
  .division:hover {
    flex: 1;
  }
}

@media (max-width: 600px) {
  .division {
    padding: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .division,
  .group-panels:hover .division {
    transition: none;
    flex: 1;
  }
}

@keyframes hero-pop {
  0% { opacity: 0; transform: translateY(20px) scale(0.95); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}