body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #74ebd5, #acb6e5);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  height: 100vh;
  margin: 0;
  padding-top: 60px;
}

.container {
  background: white;
  padding: 30px 25px;
  border-radius: 15px;
  width: 350px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  text-align: center;
}

h2 {
  margin-bottom: 20px;
  color: #333;
}

input {
  width: 65%;
  padding: 10px;
  border: 2px solid #ccc;
  border-radius: 8px;
  margin-bottom: 10px;
  font-size: 14px;
  transition: 0.3s ease;
}

input:focus {
  border-color: #7a9cc6;
  outline: none;
}

button {
  padding: 10px 15px;
  background-color: #7a9cc6;
  border: none;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.3s ease;
}

button:hover {
  background-color: #5d7fa3;
}

ul {
  list-style-type: none;
  padding: 0;
  margin-top: 15px;
  text-align: left;
}

li {
  background: #f4f4f4;
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
}

li:hover {
  background-color: #e0e0e0;
  text-decoration: line-through;
  color: #888;
}