*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body{
  background: #121212;
  color: white;
  padding: 20px;
}

h1{
  text-align: center;
  margin-bottom: 25px;
  color: #ffffff;
}

.board{
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.column{
  background: #1e1e1e;
  width: 300px;
  min-height: 400px;
  padding: 15px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
  border: 1px solid #333;
}

.column h2{
  text-align: center;
  margin-bottom: 15px;
  color: #00b894;
}

.task{
  background: #2d3436;
  color: white;
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 8px;
  cursor: grab;
  border-left: 5px solid #00cec9;
  transition: 0.3s;
}

.task:hover{
  background: #3b4345;
  transform: scale(1.02);
}

.add-task{
  display: flex;
  gap: 5px;
  margin-top: 15px;
}

.add-task input{
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 6px;
  outline: none;
  background: #2d3436;
  color: white;
}

.add-task input::placeholder{
  color: #b2bec3;
}

.add-task button{
  padding: 10px 14px;
  border: none;
  background: #00b894;
  color: white;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
}

.add-task button:hover{
  background: #019875;
}