:root {
  --iitk-blue: #002349;
  --iitk-gold: #e2b347;
  --light-gold: #f5e8c7;
  --light-text: #ffffff;
  --dark-text: #1a202c;
  --subtle-gray: #f9f9f9;
  --sidebar-bg: #f1f5f9;
  --image-block-bg: #e6eef6;
  --image-caption-color: #4a5568;
  --border-color: #d1d5db;
  --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

html, body {
  font-family:sans-serif;
  background: var(--subtle-gray);
  color: var(--dark-text);
  min-height: 100vh;
}

.container {
  width: 90%;
  max-width: 1350px;
  margin: 0 auto;
  margin-bottom: 40px;
}

.institute-header {
  background: rgba(226, 229, 233, 1);
  padding: 2.5rem 0 2rem 0;
  text-align: center;
  margin: 0 0 2rem 0;
  border-radius: 0.5rem;
}

.institute-header h1 {
  font-size: 2.2rem;
  color: var(--iitk-blue);
  font-weight: 800;
  letter-spacing: 1px;
}
.institute-header h1::after {
  content: "";
  display: block;
  width: 130px;
  height: 4px;
  background-color: var(--iitk-gold);
  margin: 2px auto 0;
  border-radius: 4px;
}

.institute-subtitle {
  color: var(--iitk-blue);
  font-size: 1.3rem;
  margin-top: 1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.main-flex {
  display: flex;
  gap: 3.25rem;
  flex-wrap: wrap;
}

aside {
  flex: 1 1 220px;
  max-width: 250px;
  min-width: 210px;
}

.sidebar {
  background: var(--image-block-bg);
  border-radius: 18px;
  box-shadow: 0 6px 32px 0 rgba(0,35,73,0.10), 0 1.5px 0 var(--iitk-blue) inset;
  padding: 1rem 0.8rem;
  position: sticky;
  top: 80px;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(6px);
  border-left: 7px solid var(--iitk-blue);
  transition: box-shadow 0.3s, transform 0.3s, background 0.3s;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 210px;
  max-width: 270px;
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  font-size: 0.9rem;
}

.sidebar h2 {
  font-size: 1.5rem;
  margin-bottom: 0.1rem;
  letter-spacing: 0.8px;
  color: var(--iitk-blue);
  font-weight: 700;
  border-bottom: 3px solid var(--iitk-gold);
  padding-bottom: 0.3rem;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.sidebar ul {
  list-style: none;
  width: 100%;
  padding-top: 0.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0;
}

.sidebar ul li {
  width: 100%;
}

.sidebar ul a {
  display: block;
  width: 100%;
  padding: 0.5em 0.8em;
  background: rgba(226,179,71,0.06);
  color: var(--iitk-blue);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 15px;
  text-decoration: none;
  transition: background 0.18s, color 0.18s, box-shadow 0.18s, transform 0.18s;
  letter-spacing: 0.2px;
  box-shadow: 0 1px 4px rgba(0,35,73,0.04);
  border: 1.5px solid transparent;
}

.sidebar ul a:hover,
.sidebar ul a:focus {
  background: linear-gradient(90deg, var(--iitk-gold) 60%, var(--light-gold) 100%);
  color: var(--iitk-blue);
  border: 1.5px solid var(--iitk-gold);
  box-shadow: 0 4px 18px 0 rgba(226,179,71,0.13);
  transform: scale(1.02) translateX(3px);
  outline: none;
}

.news-list {
  flex: 3 1 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-width: 0;
  margin-top: 10px;
}

.news-card {
  background: var(--light-text);
  border-radius: 12px;
  box-shadow: var(--shadow-light);
  padding: 2rem 1.5rem 1.5rem 1.5rem;
  transition: box-shadow 0.2s, border-left 0.2s, background 0.2s;
  /* border-left: 6px solid var(--iitk-blue); */
  min-width: 0;
}

.news-card:hover {
  border-left: 1px solid var(--iitk-gold);
  background: linear-gradient(120deg, var(--light-gold) 0%, var(--light-text) 100%);
  box-shadow: 0 8px 32px rgba(0, 35, 73, 0.12);
}

.news-card h2 {
  font-size: 1.3rem;
  color: var(--iitk-blue);
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.news-meta {
  font-size: 1rem;
  color: var(--iitk-gold);
  margin-bottom: 1rem;
  margin-top: 0.2rem;
  font-style: italic;
  font-weight: 600;
}

.news-card p {
  font-size: 1.06rem;
  line-height: 1.7;
  color: #333;
  margin-bottom: 1.2rem;
}

.news-card strong {
  color: var(--iitk-gold);
  font-weight: 700;
}

.news-img-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
  justify-content: center;
  background: var(--image-block-bg);
  border-radius: 12px;
  padding: 1rem 0.5rem;
}

.news-img-gallery img {
  width: 48%;
  max-width: none;
  flex: 0 1 48%;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10);
  background: var(--light-gold);
  object-fit: cover;
  border: 2px solid var(--iitk-blue);
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.6s, transform 0.4s, border-color 0.3s, box-shadow 0.3s;
}

.news-img-gallery img.loaded {
  opacity: 1;
  transform: scale(1);
}

.news-img-gallery img:hover {
  border-color: var(--iitk-gold);
  transform: scale(1.04) rotate(-1deg);
  box-shadow: 0 8px 32px rgba(226,179,71,0.25);
  z-index: 2;
}

@media (max-width: 900px) {
  .news-img-gallery img {
    width: 48%;
    flex: 0 1 48%;
  }
}

@media (max-width: 600px) {
  .news-img-gallery {
    flex-direction: column;
    gap: 1rem;
  }
  .news-img-gallery img {
    width: 100%;
    flex: 0 1 100%;
    max-width: 100%;
    aspect-ratio: 16/9;
  }
  .news-card {
    padding: 1.2rem 0.8rem;
  }
}

@media (max-width: 1024px) {
  .main-flex {
    flex-direction: column;
  }
  aside {
    max-width: 100%;
    margin-bottom: 2rem;
  }
}