/* Reset & base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(135deg, #667eea, #764ba2);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  animation: fadeIn 1s ease-out;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.input-group {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

input[type="text"] {
  flex: 1;
  padding: 10px 15px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  transition: 0.3s;
}

input[type="text"]:focus {
  border-color: #764ba2;
  outline: none;
}

button {
  padding: 10px 20px;
  background: #764ba2;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.3s ease;
}

button:hover {
  background: #5e3c8a;
}

/* Task list */
ul {
  list-style: none;
  margin-top: 25px;
}

li {
  background: #f4f4f4;
  margin-bottom: 12px;
  padding: 12px 18px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  animation: slideIn 0.3s ease;
  position: relative;
}

li.done {
  text-decoration: line-through;
  opacity: 0.6;
}

li .delete {
  background: transparent;
  border: none;
  color: #ff5c5c;
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

li .delete:hover {
  transform: scale(1.3);
}

/* Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}