* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
}

body {
  background: #f4f4f4;
  padding: 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

h1 {
  color: #333;
}

#task-form {
  margin-bottom: 20px;
}

#task-input {
  padding: 10px;
  width: 70%;
  margin-right: 10px;
}

#add-task-btn, #logout-btn {
  padding: 10px 15px;
  background-color: #007bff;
  color: white;
  border: none;
  cursor: pointer;
}

.task {
  background: white;
  padding: 10px;
  margin-bottom: 10px;
  border-left: 5px solid #007bff;
  display: flex;
  justify-content: space-between;
}

.auth-container {
  max-width: 400px;
  margin: 80px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.auth-container input {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
}

.auth-container button {
  width: 100%;
  padding: 10px;
  background-color: #28a745;
  color: white;
  border: none;
  cursor: pointer;
}