* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  background: linear-gradient(135deg, #f4f7fb, #dfe9f3);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.container {
  width: 100%;
  max-width: 560px;
  background: #ffffff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
}

h1 {
  margin-top: 0;
  margin-bottom: 18px;
  text-align: center;
}

.todo-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}

.input-group {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

#taskInput {
  flex: 1;
  padding: 10px;
  border: 1px solid #c7c7c7;
  border-radius: 8px;
  font-size: 1rem;
}

#addTaskBtn {
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  background: #1e88e5;
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

#addTaskBtn:hover {
  background: #166fc0;
}

#taskList {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid #d4d4d4;
  border-radius: 8px;
  background: #fafafa;
}

.remove-btn {
  border: none;
  border-radius: 6px;
  background: #d9534f;
  color: #ffffff;
  padding: 6px 10px;
  cursor: pointer;
}

.remove-btn:hover {
  background: #b8403c;
}