body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #fff8dc, #ffe4b5);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
}

.app-container {
  background-color: #ffffff;
  border-radius: 20px;
  max-width: 600px;
  width: 100%;
}

.app-title {
  font-weight: 600;
  color: #ff7f50;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
}

.add-btn {
  background-color: #ffa500;
  color: white;
  font-weight: 600;
  border-radius: 20px;
  transition: 0.3s ease;
}

.add-btn:hover {
  background-color: #e69500;
}

.filter-btn {
  flex: 1;
  border-radius: 20px;
  background-color: #f8f9fa;
  color: #555;
  margin: 0 5px;
  transition: 0.2s ease;
}

.filter-btn.active,
.filter-btn:hover {
  background-color: #ffa500;
  color: white;
}

.list-group-item {
  border-radius: 15px;
  margin-bottom: 10px;
  transition: box-shadow 0.2s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
}

.list-group-item:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.task-text {
  font-size: 1rem;
  font-weight: 500;
  flex-grow: 1;
  margin-right: 15px;
}

.completed {
  text-decoration: line-through;
  color: #999;
}

.progress-bar.bg-gradient {
  background: linear-gradient(90deg, #007bff, #00c6ff);
  font-weight: 500;
}