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

body{
  background: linear-gradient(100deg, #2be97d, #4c085f);
  min-height: 100vh;
  padding: 20px;
}

.todo-app{
  width: 100%;
  max-width: 540px;
  background: #fff;
  margin: 80px auto 20px;
  padding: 40px 30px 70px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.todo-app h2{
  color: #002765;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 28px;
}

.todo-app h2 img{
  width: 30px;
  height: 30px;
}

.row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #edeef0;
  border-radius: 30px;
  padding-left: 20px;
  margin-bottom: 25px;
  gap: 10px;
  overflow: hidden;
}

input{
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 15px 10px;
  font-size: 14px;
  min-width: 0;
}

button{
  border: none;
  outline: none;
  padding: 16px 35px;
  background: #ff5945;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  border-radius: 40px;
  white-space: nowrap;
  transition: 0.3s ease;
}

button:hover{
  background: #e64a38;
}

ul{
  padding-left: 0;
}

ul li{
  list-style: none;
  font-size: 17px;
  padding: 15px 45px 15px 50px;
  user-select: none;
  cursor: pointer;
  position: relative;
  text-align: left;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

ul li::before{
  content: '';
  position: absolute;
  height: 28px;
  width: 28px;
  border-radius: 50%;
  background-image: url(check.png);
  background-size: cover;
  background-position: center;
  top: 12px;
  left: 8px;
}

ul li.checked{
  color: #555;
  text-decoration: line-through;
}

ul li.checked::before{
  background-image: url(check1.png);
}

ul li span{
  position: absolute;
  right: 0;
  top: 8px;
  width: 35px;
  height: 35px;
  font-size: 22px;
  color: #555;
  line-height: 35px;
  text-align: center;
  border-radius: 50%;
}

ul li span:hover{
  background: #edeef0;
}

/* =========================
   TABLET RESPONSIVE
========================= */
@media (max-width: 768px){
  .todo-app{
    margin: 60px auto 20px;
    padding: 30px 20px 50px;
  }

  .todo-app h2{
    font-size: 24px;
  }

  .row{
    padding-left: 15px;
  }

  button{
    padding: 14px 25px;
    font-size: 15px;
  }

  ul li{
    font-size: 16px;
    padding: 14px 40px 14px 45px;
  }

  ul li::before{
    height: 24px;
    width: 24px;
    top: 13px;
  }
}

/* =========================
   MOBILE RESPONSIVE
========================= */
@media (max-width: 480px){
  body{
    padding: 15px;
  }

  .todo-app{
    margin: 40px auto 20px;
    padding: 25px 15px 40px;
    border-radius: 8px;
  }

  .todo-app h2{
    font-size: 20px;
    flex-wrap: wrap;
  }

  .todo-app h2 img{
    width: 24px;
    height: 24px;
  }

  .row{
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 20px;
    gap: 12px;
  }

  input{
    width: 100%;
    padding: 12px;
    font-size: 14px;
    background: #fff;
    border-radius: 10px;
  }

  button{
    width: 100%;
    padding: 14px;
    font-size: 15px;
    border-radius: 12px;
  }

  ul li{
    font-size: 15px;
    padding: 14px 35px 14px 42px;
  }

  ul li::before{
    height: 22px;
    width: 22px;
    top: 14px;
    left: 8px;
  }

  ul li span{
    width: 30px;
    height: 30px;
    font-size: 20px;
    line-height: 30px;
    top: 10px;
  }
}

/* =========================
   EXTRA SMALL DEVICES
========================= */
@media (max-width: 320px){
  .todo-app h2{
    font-size: 18px;
  }

  button{
    font-size: 14px;
    padding: 12px;
  }

  ul li{
    font-size: 14px;
  }
}