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

body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  padding: 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #333;
}

button {
  background: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: #0056b3;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1200px;
}

.column {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  min-height: 500px;
}

.column h2 {
  margin-bottom: 20px;
  color: #333;
  border-bottom: 2px solid #eee;
  padding-bottom: 10px;
}

.task {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 15px;
  margin-bottom: 10px;
}

.task h4 {
  margin-bottom: 8px;
  color: #333;
}

.task p {
  color: #666;
  font-size: 14px;
  margin-bottom: 8px;
}

.priority {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: bold;
  text-transform: uppercase;
}

.priority.high {
  background: #ffebee;
  color: #c62828;
}

.priority.medium {
  background: #fff3e0;
  color: #ef6c00;
}

.priority.low {
  background: #e8f5e8;
  color: #2e7d32;
}

.task-actions {
  margin-top: 10px;
  text-align: right;
}

.task-actions button {
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  margin-left: 5px;
}

.move-btn {
  background: #28a745;
  color: white;
}

.move-btn:hover {
  background: #218838;
}

.delete-btn {
  background: #dc3545;
  color: white;
}

.delete-btn:hover {
  background: #b02a37;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: white;
  padding: 30px;
  border-radius: 8px;
  width: 90%;
  max-width: 400px;
}

.modal-content h3 {
  margin-bottom: 20px;
  color: #333;
}

.modal-content input,
.modal-content textarea,
.modal-content select {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.modal-content textarea {
  height: 80px;
  resize: vertical;
}

.modal-buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.modal-buttons button:last-child {
  background: #6c757d;
}

@media (max-width: 768px) {
  .board {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  header {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
}