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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 40px 20px;
}

.container {
  max-width: 500px;
  margin: 0 auto;
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

h1 {
  color: #333;
  margin-bottom: 20px;
  text-align: center;
}

#add-form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

#item-input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.2s;
}

#item-input:focus {
  outline: none;
  border-color: #667eea;
}

button {
  padding: 12px 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button:active {
  transform: translateY(0);
}

#item-list {
  list-style: none;
}

.item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  background: #f8f9fa;
  border-radius: 8px;
  margin-bottom: 10px;
  transition: background 0.2s;
}

.item:hover {
  background: #e9ecef;
}

.item-name {
  color: #333;
  font-size: 16px;
}

.delete-btn {
  padding: 8px 16px;
  background: #dc3545;
  font-size: 14px;
}

.delete-btn:hover {
  background: #c82333;
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.4);
}

.empty-message {
  text-align: center;
  color: #999;
  padding: 40px;
}