@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

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

body {
  font-family: 'Poppins', sans-serif;
  background: #f4f6f8;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  width: 450px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

header {
  margin-bottom: 20px;
  text-align: center;
}

h1 {
  font-weight: 700;
  margin-bottom: 5px;
}

.subtitle {
  font-size: 14px;
  color: #666;
}

form {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

button {
  padding: 10px;
  background: salmon;
  color: white;
  border-radius: 5px;
  width: 100px;
  border: none;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #ff5a5a;
}

input[type='text'] {
  padding: 10px;
  border-radius: 5px;
  width: 100%;
  height: 40px;
  border: 1px #ccc solid;
  margin-right: 10px;
}

#todo-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#todo-list > div {
  border: 1px #ddd solid;
  padding: 10px 15px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s;
}

#todo-list > div:hover {
  background: #f1f1f1;
}

.done {
  background: #d3ffd3;
  text-decoration: line-through;
  color: #555;
}