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

body {
  font-family: Arial, sans-serif;
  background-color: #f7f9fc;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-image: url("https://images.unsplash.com/photo-1507525428034-b723cf961d3e?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1950&q=80");
}

.container {
  text-align: center;
  width: 100%;
  padding: 1.2rem;
  height: 100%;
}

h1 {
  color: #333;
  margin-bottom: 20px;
  font-size: 2.5rem;
}

.board {
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  gap: 20px;
  height: 100vh;
  max-height: 80vh;
}

.list {
  background-color: #e3e4e8;
  padding: 1rem;
  border-radius: 5px;
  width: 30%;
  min-height: 300px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  height: 100%;
}

.list h2 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: #555;
}

.card {
  background-color: #fff;
  color: #333;
  padding: 1rem;
  margin-bottom: 10px;
  border-radius: 8px;
  cursor: grab;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.card:active {
  cursor: grabbing;
  transform: scale(1.05);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.list.over {
  background-color: #d0d3d8;
  border: 2px dashed #999;
}

@media (max-width: 768px) {
  .board {
    flex-direction: column;
    align-items: center;
  }

  .list {
    width: 80%;
    margin-bottom: 20px;
  }
}