* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Serif Bengali', serif;
  background-color: #f5f5f5;
  color: #222;
}

/* Header */
.page-header {
  text-align: center;
  padding: 30px 15px;
  background: #ffffff;
  border-bottom: 1px solid #ddd;
}

.page-header h1 {
  margin: 0;
  font-size: 26px;
}

.page-header p {
  margin-top: 8px;
  font-size: 14px;
  color: #555;
}

/* Container */
.category-container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 15px;

  display: grid;
  gap: 20px;
}

/* Card */
.category-card {
  display: block;
  padding: 22px 15px;
  text-align: center;
  text-decoration: none;
  color: #000;
  background: #ffffff;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 18px;

  transition: 
    background-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

/* Hover effect */
.category-card:hover {
  background-color: #f0f7ff;
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
  transform: translateY(-3px);
}

/* Responsive */
@media (min-width: 600px) {
  .category-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .category-container {
    grid-template-columns: repeat(3, 1fr);
  }
}