* {
      box-sizing: border-box;
      font-family: 'Segoe UI', sans-serif;
    }

    body {
      margin: 0;
      padding: 20px;
      background: #f5f5f5;
      color: #333;
    }

    .container {
      max-width: 400px;
      margin: auto;
      background: #fff;
      padding: 20px;
      border-radius: 15px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    }

    h2 {
      text-align: center;
      margin-bottom: 20px;
    }

    input[type="text"] {
      width: 100%;
      padding: 12px;
      border: 2px solid #ccc;
      border-radius: 8px;
      font-size: 16px;
    }

    .buttons {
      display: flex;
      justify-content: space-between;
      margin-top: 10px;
    }

    .buttons button {
      flex: 1;
      margin: 5px;
      padding: 10px;
      font-size: 14px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.3s;
    }

    .add {
      background-color: #4CAF50;
      color: white;
    }

    .edit {
      background-color: #2196F3;
      color: white;
    }

    .delete {
      background-color: #f44336;
      color: white;
    }

    .notes-list {
      margin-top: 20px;
    }

    .note {
      padding: 12px;
      background: #f0f0f0;
      border-radius: 10px;
      margin-bottom: 10px;
      position: relative;
    }

    .note.done {
      text-decoration: line-through;
      background: #d4edda;
      color: #155724;
    }

    .note-buttons {
      position: absolute;
      right: 10px;
      top: 10px;
    }

    .note-buttons button {
      margin-left: 5px;
      font-size: 12px;
      padding: 5px;
    }