:root{
  /* --mainBg:radial-gradient(90deg,#0f2027,#203a43,#2c5364);  */
  --mainBg:linear-gradient(90deg,#05303e,#0b4052); 
}

 .btn-primary{
      background: var(--mainBg) !important;
      border: none !important;
      box-shadow: 1px 1px 2px gray !important;
    }

body {
  background: #f8f9fa;
}

.sidebar {
  background: #2d5ca4;
  color: white;
  min-height: 100vh;
  padding: 20px;
}

.sidebar h4 {
  font-weight: bold;
  margin-bottom: 20px;
}

.sidebar .chapter {
  margin-bottom: 10px;
}
.subject-title{
  color: rgba(0, 0, 0, 0.749);
}
/* Sidebar topic items */
.sidebar li {
  cursor: pointer;
  /* margin-left: 10px; */
  padding: 6px 10px;
  color: #2d5ca4;
  border-radius: 6px;
  transition: all 0.3s ease;
  list-style: none;
}

.sidebar li:hover {
  background: rgba(255, 255, 255, 0.2); /* soft white highlight */
  color: #021a3e; /* golden text highlight */
  text-decoration: none; /* remove underline */
  transform: translateX(2px);
}

.assignment-box {
  /* background: #c4f1ff; */
  /* background: #05303e57; */
  background: #05303e0c;
  /* color: white; */
  padding: 15px;
  border-radius: 5px;
  margin-top: 20px;
}

.assignment-panel {
  background: #4caf50;
  padding: 20px;
  border-radius: 10px;
  margin-top: 10px;
  color: white;
  min-height: 150px;
}