@import url("https://fonts.googleapis.com/css2?family=League+Spartan:wght@300;400;500;600;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Theme 1 */
  /* Background */
  --main-background: hsl(222, 26%, 31%);
  --toggle-and-keypad-background: hsl(223, 31%, 20%);
  --screen-background: hsl(224, 36%, 15%);

  /* Keys */
  --key-background: hsl(30, 25%, 89%);
  --key-shadow: hsl(28, 16%, 65%);
  --key-hover: #fff;

  --reset-key-background: hsl(225, 21%, 49%);
  --reset-key-shadow: hsl(224, 28%, 35%);
  --reset-key-hover: hsl(222, 36%, 71%);

  --equal-key-background: hsl(6, 63%, 50%);
  --equal-key-shadow: hsl(6, 70%, 34%);
  --equal-key-hover: hsl(6, 100%, 67%);

  /* Text */
  --white: #fff;
  --logo: hsl(0, 0%, 100%);
  --keypad-text: hsl(0, 0%, 100%);
  --key-text: hsl(221, 14%, 31%);

  --spacing: 1.2rem;
  --border-radius: 0.6rem;
}

.theme2{
/* Background */
--main-background: hsl(0, 0%, 90%);
--toggle-and-keypad-background: hsl(0, 5%, 81%);
--screen-background: hsl(0, 0%, 93%);

--key-background: hsl(45, 7%, 89%);
--key-shadow: hsl(35, 11%, 61%);
--key-hover: #fff;

--reset-key-background: hsl(185, 42%, 37%);
--reset-key-shadow: hsl(185, 58%, 25%);
--reset-key-hover: hsl(185, 51%, 57%);

--equal-key-background: hsl(25, 98%, 40%);
--equal-key-shadow: hsl(25, 99%, 27%);
--equal-key-hover: hsl(25, 100%, 65%);

--logo: hsl(60, 10%, 19%);
--keypad-text: hsl(60, 10%, 19%);
--key-text: hsl(60, 10%, 19%);
}

.theme3{
--main-background: hsl(268, 75%, 9%);
--toggle-and-keypad-background: hsl(268, 71%, 12%)  ;
--screen-background: hsl(268, 71%, 12%)  ;

--key-background: hsl(268, 47%, 21%);
--key-shadow: hsl(285, 91%, 52%);
--key-hover: hsl(271, 88%, 34%);

--reset-key-background: hsl(281, 89%, 26%);
--reset-key-shadow: hsl(285, 91%, 52%);
--reset-key-hover: hsl(281, 63%, 51%);


--equal-key-background: hsl(176, 100%, 44%);
--equal-key-shadow: hsl(177, 92%, 70%);
--equal-key-hover: hsl(176, 100%, 82%);

--logo: hsl(52, 100%, 62%);
--key-text: hsl(52, 100%, 62%);
--keypad-text: hsl(52, 100%, 62%);
}

body {
  background: var(--main-background);
  color: var(--White);
  font-family: "League Spartan", sans-serif;
  min-height: 100vh;
  /* width: 70%; */
  margin: 3rem auto 0 auto;
  display: grid;
  place-content: center;
  padding: 2rem;
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 1.8rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--logo);
}

.theme {
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-direction: column;
  gap: 0.4rem;

  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.toggleField {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.themeNo {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-right: 0.7rem;
}

#toggleContainer {
  position: relative;
  background: var(--toggle-and-keypad-background);
  width: 4.4rem;
  height: 1.6rem;
  padding: 0.3rem 0.4rem;
  border-radius: 1.2rem;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.toggle-state{
  padding: 0.4rem;
  border: none;
  opacity: 0;
  cursor: pointer;
}

.circle {
  position: absolute;
  background: var(--equal-key-background);
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  transition: left 300ms ease-in;
  left: 7%;
  cursor: pointer;
}

.circle:hover,
.circle:focus{
  background: var(--equal-key-hover);
}

.keypad {
  background: var(--screen-background);
  color: var(--keypad-text);
  width: 100%;
  padding: 3.5rem var(--spacing);
  border: none;
  border-radius: var(--border-radius);
  margin-block: var(--spacing);
  text-align: right;
}

main {
  background: var(--toggle-and-keypad-background);
  border-radius: var(--border-radius);
  margin-bottom: 3rem;
}

.container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing);
  text-align: center;
  padding: var(--spacing);
  border-radius: var(--border-radius);
}

.key {
  background: var(--key-background);
  padding: 0.7rem 1.3rem;
  border: none;
  border-radius: var(--border-radius);
  border-bottom: 4px solid var(--key-shadow);
  font-size: 2rem;
  font-weight: 700;
  color: var(--key-text);
  cursor: pointer;
}

.key:focus,
.key:hover{
  background: var(--key-hover);
}

.wrapper {
  padding: 0 var(--spacing) var(--spacing) var(--spacing);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing);
}

.wrapper button {
  color: var(--white);
  width: 100%;
  padding: var(--spacing);
  border-radius: var(--border-radius);
  border: none;
  border-bottom: 4px solid;
  text-transform: uppercase;
  font-size: 1.4rem;
  font-weight: 600;
}

.key:nth-of-type(4),
#reset {
  background: var(--reset-key-background);
  border-bottom-color: var(--reset-key-shadow);
  cursor: pointer;
}

#reset:hover,
#reset:focus,
#delete:hover,
#delete:focus{
  background: var(--reset-key-hover);
}

#delete {
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

#equal {
  background: var(--equal-key-background);
  border-bottom-color: var(--equal-key-shadow);
}

#equal:hover,
#equal:focus{
  background: var(--equal-key-hover);
}

footer {
  margin-bottom: 2rem;
  width: 90%;
  margin-inline: auto;
}
.attribution {
  color: var(--logo);
  font-size: 1rem;
  text-align: center;
}
.attribution a {
  color: var(--equal-key-background);
  text-decoration: none;
  letter-spacing: 1px;
}

@media(max-width: 500px){
  body {
    margin: 1.5rem auto 0 auto;
  }


  .key {
    padding: 0.7rem 1.3rem;
    font-size: 1.7rem;
  }

  #delete {
    font-size: 1rem;
    font-weight: 700;
  }
}