/* ==========================================================================
   Captain Rakesh Mohan Shyam Degree College
   College Code: 0538 | Bharnakalan, Mathura | DBRAU Agra
   Unobstructed Image Showcase & Clean Header
   ========================================================================== */

:root {
  --accent-gold: #f59e0b;
  --accent-gold-light: #fde68a;
  --font-serif: 'Cinzel', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: var(--font-sans);
  background-color: #030712;
  color: #ffffff;
  -webkit-font-smoothing: antialiased;
}

/* --------------------------------------------------------------------------
   Full Viewport Background Image Slider
   -------------------------------------------------------------------------- */
.slider {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 0.9s ease-in-out;
}

.slide.active {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Header: Minimal & Clear Text
   -------------------------------------------------------------------------- */
.college-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 1.5rem 2rem 2.8rem;
  background: linear-gradient(
    to bottom,
    rgba(6, 12, 24, 0.92) 0%,
    rgba(6, 12, 24, 0.72) 45%,
    rgba(6, 12, 24, 0.35) 75%,
    transparent 100%
  );
  pointer-events: none; /* Allows clicking through gradient */
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  pointer-events: auto;
}

.logo {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.6));
}

.title-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.college-name {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3.2vw, 2.3rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

.college-details {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: clamp(0.85rem, 1.4vw, 1.05rem);
  color: #e2e8f0;
  font-weight: 500;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.85);
}

.detail-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.sep {
  opacity: 0.5;
  color: var(--accent-gold);
}

.code-tag {
  background: rgba(245, 158, 11, 0.22);
  border: 1px solid rgba(245, 158, 11, 0.55);
  color: var(--accent-gold-light);
  padding: 0.15rem 0.65rem;
  border-radius: 9999px;
  font-weight: 600;
}

.code-tag strong {
  color: #ffffff;
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------------------------
   Navigation Arrows (Left / Right)
   -------------------------------------------------------------------------- */
.nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  background: rgba(9, 18, 36, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.25s ease;
  user-select: none;
}

.nav-arrow:hover {
  background: rgba(245, 158, 11, 0.85);
  color: #0b1120;
  border-color: var(--accent-gold);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.6);
}

.nav-arrow.prev {
  left: 1.5rem;
}

.nav-arrow.next {
  right: 1.5rem;
}

/* --------------------------------------------------------------------------
   Bottom Bar: Caption & Thumbnails
   -------------------------------------------------------------------------- */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 2.5rem 2rem 1.4rem;
  background: linear-gradient(
    to top,
    rgba(6, 12, 24, 0.92) 0%,
    rgba(6, 12, 24, 0.65) 50%,
    rgba(6, 12, 24, 0.25) 75%,
    transparent 100%
  );
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.caption {
  font-size: clamp(0.95rem, 1.8vw, 1.25rem);
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.85);
}

.thumbnails {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.thumb {
  width: 72px;
  height: 48px;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: #000;
  cursor: pointer;
  padding: 0;
  transition: all 0.25s ease;
  opacity: 0.65;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb:hover {
  opacity: 0.95;
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.8);
}

.thumb.active {
  opacity: 1;
  border-color: var(--accent-gold);
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.7);
  transform: translateY(-4px) scale(1.05);
}

/* --------------------------------------------------------------------------
   Responsive Styles
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .college-header {
    padding: 1rem 1rem 2rem;
  }

  .header-inner {
    gap: 0.85rem;
  }

  .logo {
    width: 48px;
    height: 48px;
  }

  .sep {
    display: none;
  }

  .college-details {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .nav-arrow {
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }

  .nav-arrow.prev {
    left: 0.6rem;
  }

  .nav-arrow.next {
    right: 0.6rem;
  }

  .bottom-bar {
    padding: 1.5rem 1rem 1rem;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    text-align: center;
  }

  .thumb {
    width: 58px;
    height: 38px;
  }
}