body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #6dedde, #2185b0);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
}

.container {
  background: rgb(224, 243, 246);
  padding: 20px;
  border-radius: 15px;
  width: 420px;
  box-shadow: 0px 4px 15px rgba(0,0,0,0.2);
}

h1 {
  text-align: center;
  color: #2193b0;
  margin-bottom: 20px;
}

.task-input {
  display: flex;
  gap: 8px;
  margin-bottom: 15px;
}

.task-input input, .task-input button {
  padding: 10px;
  border-radius: 8px;
  border: 2px solid #aed9e3;
  outline: none;
}

.task-input input[type="text"] {
  flex: 1;
}

.task-input input[type="date"] {
  width: 40%;
}

.task-input button {
  background: #2193b0;
  color: rgb(217, 234, 238);
  border: none;
  cursor: pointer;
  transition: 0.3s;
}

.task-input button:hover {
  background: #176682;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  background: #c4d8db;
  padding: 10px;
  margin: 8px 0;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

li.completed {
  text-decoration: line-through;
  background: #d4edda;
  color: #155724;
}

li.overdue {
  background: #f8d7da;
  color: #721c24;
}

.task-details {
  flex: 1;
}

.due-date {
  font-size: 12px;
  color: gray;
}

.progress-container {
  margin-top: 20px;
}

.progress-bar {
  height: 20px;
  background: #f1f1f1;
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: #0f809d;
  text-align: center;
  color: white;
  font-size: 12px;
  line-height: 20px;
  border-radius: 10px;
}

.btn-small {
  background: red;
  color: white;
  border: none;
  padding: 5px 8px;
  border-radius: 5px;
  cursor: pointer;
  margin-left: 8px;
}

.btn-small:hover {
  background: rgb(111, 5, 5);
}