$color-background: #dcdde1;
$color-text: #2f3640;
$color-letter: #f5f6fa;

body {
  background-color: $color-background;
  color: $color-text;
  font-size: 16px;
  line-height: 24px;
}


.wrapper {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.intro p {
  margin: 30px 0;
}

.letter {
  background-color: $color-letter;
  width: 600px;
  padding: 48px;
  position: relative;  
  max-width: 90vw;
  margin: 5vh auto;
  
}

.letter::before,
.letter::after {
  content: "";
  position: absolute;
  bottom: 12px;
  width: 40%;
  height: 10px;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.7);
  z-index: -1;
}

.letter::before {
  left: 15px;
  transform: skew(-5deg) rotate(-5deg);
}

.letter::after {
  right: 15px;
  transform: skew(5deg) rotate(5deg);
}

* {
  box-sizing: border-box;
}

/* Kasuje margin i padding z listy */
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Styluje elementy listy zadań */
ul li {
  cursor: pointer;
  position: relative;
  padding: 12px 8px 12px 40px;
  background: #eee;
  font-size: 18px;
  transition: 0.2s;
  
  

  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Ustawia nieparzyste elementy listy na inny kolor (efekt zebry) */
ul li:nth-child(odd) {
  background: #f9f9f9;
}

/* Ciemniejszy kolor tła po najechaniu myszką */
ul li:nth-child(even):hover {
  background: #ddd;
}

/* Efekt wywołany po kliknięciu - zmienia kolor i powoduje przekreślenie tekstu */
ul li.checked {
  background: #888;
  color: #fff;
  text-decoration: line-through;
}

/* Dodaje znacznik ukończenia zadania */
ul li.checked::before {
  content: '';
  position: absolute;
  border-color: #fff;
  border-style: solid;
  border-width: 0 2px 2px 0;
  top: 10px;
  left: 16px;
  transform: rotate(45deg);
  height: 15px;
  width: 7px;
}

/* Styluje przycisk zamknięcia zadania */
.close {
  position: absolute;
  right: 0;
  top: 0;
  padding: 12px 16px 12px 16px;
}

.close:hover {
  
}

/* Styl nagłówka */
.header {
  border-radius: 100px;
  background-color: #02ac46;
  padding: 30px 40px;
  color: white;
  margin-bottom: 15px;
  text-align: center;
  background: rgb(255,0,118);
background: linear-gradient(209deg, rgba(255,0,118,1) 0%, rgba(225,3,130,1) 14%, rgba(203,5,139,1) 28%, rgba(200,5,140,1) 41%, rgba(89,15,183,1) 100%);
}

/* Clear floats after the header */
.header:after {
  content: "";
  display: table;
  clear: both;
}

/* Styluje pole do wpisywania treśći */
input {
  height: 44px;
  margin: 0;
  border: none;
  border-radius: 0;
  width: 75%;
  padding: 10px;
  float: left;
  font-size: 16px;
}

/* Styluje przycisk "Dodaj"  */
.addBtn {
  padding: 10px;
  color: #555;
  float: left;
  text-align: center;
  cursor: pointer;
  transition: 0.3s;
  border-radius: 30px;
  font-size: 45px;
  color: white;
  border: 2px solid white;
  margin-left: 50px;
}

#myInput{
  border-radius: 50px;
  background-color: rgba(0,0,0,0);
  border: 2px solid white;
  color: white;
  
}

#myInput::placeholder{
  color: white;
}

.intro{
  text-align: center;
}