*{
      box-sizing:border-box;
      font-family:'Poppins',sans-serif;
    }
    body{
      margin:0;
      min-height:100vh;
      background:linear-gradient(135deg,#caf0f8,#e0fbfc);
      display:flex;
      justify-content:center;
      align-items:center;
    }
    .app{
      background:white;
      width:90%;
      max-width:800px;
      padding:25px 30px;
      border-radius:16px;
      box-shadow:0 10px 30px rgba(0,0,0,0.1);
    }
    h1{
      text-align:center;
      color:#0077b6;
      margin-bottom:20px;
      font-weight:600;
    }
    .form-container{
      display:flex;
      gap:10px;
      margin-bottom:20px;
    }
    .form-container input{
      flex:1;
      padding:12px 14px;
      border-radius:10px;
      border:1px solid #ccc;
      outline:none;
      font-size:14px;
    }
    .form-container button{
      padding:12px 18px;
      border-radius:10px;
      border:none;
      background:#0077b6;
      color:white;
      font-weight:500;
      cursor:pointer;
      transition:0.3s;
    }
    .form-container button:hover{
      background:#023e8a;
      transform:scale(1.03);
    }
    table{
      width:100%;
      border-collapse:collapse;
      overflow:hidden;
      border-radius:12px;
    }
    thead{
      background:#0077b6;
      color:white;
    }
    th,td{
      padding:14px 10px;
      text-align:center;
    }
    tbody tr{
      transition:0.2s;
    }
    tbody tr:hover{
      background:#f1faff;
    }
    .habit-name{
      text-align:left;
      padding-left:15px;
      font-weight:500;
    }
    .checkbox{
      width:18px;
      height:18px;
      cursor:pointer;
    }
    .delete-btn{
      background:#ff595e;
      border:none;
      color:white;
      padding:6px 10px;
      border-radius:6px;
      cursor:pointer;
      transition:0.2s;
    }
    .delete-btn:hover{
      background:#d62828;
      transform:scale(1.05);
    }
    footer{
      text-align:center;
      margin-top:20px;
      color:#555;
      font-size:14px;
    }