:root {
  /*THEME 1*/
  --Very_dark_desaturated_blue1: hsl(222, 26%, 31%); /*(main background)*/
  --Very_dark_desaturated_blue2: hsl(
    223,
    31%,
    20%
  ); /*(toggle background, keypad background)*/
  --Very_dark_desaturated_blue3: hsl(224, 36%, 15%); /*(screen background)*/

  --Desaturated_dark_blue1: hsl(225, 21%, 49%); /*(key background)*/
  --Desaturated_dark_blue2: hsl(224, 28%, 35%); /*(key shadow)*/

  --Red: hsl(6, 63%, 50%); /*(key shadow)*/
  --Dark_red: hsl(6, 70%, 34%); /*(key shadow)*/

  --Light_grayish_orange: hsl(30, 25%, 89%); /*(key background)*/
  --Grayish_orange: hsl(28, 16%, 65%); /*(key shadow)*/

  /*TEXT*/
  --Very_dark_grayish_blue: hsl(221, 14%, 31%);
  --White: hsl(0, 0, 100%);

  /*THEME 2*/
  --Light_gray: hsl(0, 0%, 90%); /*(main background)*/
  --Grayish_red: hsl(0, 5%, 81%); /*(toggle background, keypad background)*/
  --Very_light_gray: hsl(0, 0%, 93%); /*(screen background)*/

  --Dark_moderate_cyan: hsl(185, 42%, 37%); /*(key background)*/
  --Very_dark_cyan: hsl(185, 58%, 25%); /*(key shadow)*/

  --Orange: hsl(25, 98%, 40%); /*(key background, toggle)*/
  --Dark_orange: hsl(25, 99%, 27%); /*(key shadow)*/

  --Light_grayish_yellow: hsl(45, 7%, 89%); /*(key background)*/
  --Dark_grayish_orange: hsl(35, 11%, 61%); /*(key shadow)*/

  /*(text)*/
  --Very_dark_grayish_yellow: hsl(60, 10%, 19%);
  --White: hsl(0, 0, 100%);

  /*THEME 3*/
  --Very_dark_violet: hsl(268, 75%, 9%); /*(main background)*/
  --Very_dark_violet: hsl(
    268,
    71%,
    12%
  ); /*(toggle background, keypad background, screen background)*/

  --Dark_violet: hsl(281, 89%, 26%); /*(key background)*/
  --Vivid_magenta: hsl(285, 91%, 52%); /*(key shadow)*/

  --Pure_cyan: hsl(176, 100%, 44%); /*(key background, toggle)*/
  --Soft_cyan: hsl(177, 92%, 70%); /*(key shadow)*/

  --Very_dark_violet: hsl(268, 47%, 21%); /*(key background)*/
  --Dark_magenta: hsl(290, 70%, 36%); /*(key shadow)*/

  /*Text*/

  --Light_yellow: hsl(52, 100%, 62%);
  --Very_dark_blue: hsl(198, 20%, 13%);
  --White: hsl(0, 0, 100%);
}

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

body {
  background-color: var(--Very_dark_desaturated_blue1);
}

nav {
  padding: 20px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  /* border: 1px solid white; */
  margin-top: 20px;
  margin-bottom: 10px;
}

.logo {
  font-size: 32px;
  color: white;
}

.toggler {
  color: white;
  display: grid;
  grid-template-columns: 70px 70px;
  grid-template-rows: 20px 20px;
  grid-template-areas:
    "theme labels"
    "theme inputs";
  margin-top: -7px;
  /* border: 1px solid white; */
}

.toggler p {
  grid-area: theme;
  /* border: 1px solid black; */
  /* text-align: right; */
  align-self: flex-end;
}

.labels {
  grid-area: labels;
  /* border: 1px solid black; */
  text-align: center;
}

.labels label {
  margin: 0 4px 0 4px;
}

.inputs {
  position: relative;
  grid-area: inputs;
  /* border: 1px solid black; */
  text-align: center;
}

.inputs input {
  margin: 10px 2px 0 2px;
  transform: scale(2);
  opacity: 0;
  z-index: 1;
}

.red-slider {
  /* display: none; */
  border-radius: 20px;
  padding: 5px;
  width: 70px;
  background-color: var(--Very_dark_desaturated_blue2);
  position: absolute;
  top: 6.5%;
  right: 0%;
  z-index: -1;
  transition: all 0.2s ease;
}

.red-slider div {
  background-color: red;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

.calculator {
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  /* align-content: center; */
}

.maindisplay {
  grid-area: display;
  width: 90%;
  /* border: 1px solid black; */
}

.maindisplay input {
  width: 100%;
  background-color: var(--Very_dark_desaturated_blue3);
  border-radius: 10px;
  height: 100px;
  /* direction: rtl; */
  text-align: right;
  color: white;
  border: none;
  font-size: 32px;
  padding: 10px;
}

.keyboard {
  background-color: var(--Very_dark_desaturated_blue2);
  height: 75%;
  width: 90%;
  display: flex;
  flex-wrap: wrap;
  border-radius: 10px;
}

.row1,
.row2,
.row3,
.row4,
.row5 {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  /* margin-bottom: -20px; */
  /* border: 1px solid white; */
}

.btn {
  width: 60px;
  height: 60px;
  margin: 10px;
  font-size: 32px;
  background-color: var(--Light_grayish_orange);
  box-shadow: 0 5px var(--Grayish_orange);
  color: hsl(221, 14%, 31%);
  border: none;
  border-radius: 5px;
}

.btn:active {
  transform: translateY(4px);
}

.row5 input {
  width: 140px;
  height: 70px;
}

#reset,
#del {
  font-size: 20px;
  color: white;
  background-color: var(--Desaturated_dark_blue1);
  box-shadow: 0 5px var(--Desaturated_dark_blue2);
}

#equal {
  color: white;
  background-color: red;
  box-shadow: 0 5px var(--Dark_red);
}

footer {
  color: hsl(30, 25%, 89%);
}

footer a {
  text-decoration: none;
  color: hsl(28, 16%, 65%);
}

.attribution {
  font-size: 11px;
  text-align: center;
  margin-top: 15px;
}

@media only screen and (min-width: 700px) {
  .container1 {
    display: flex;
    margin: 0 auto;
    width: 80%;
  }
  .container2 {
    margin: 0 auto;
    width: 40%;
  }
  nav {
    padding-left: 0;
    padding-right: 0;
    /* justify-content: flex-end; */
    margin: 0 auto;
  }
  .inputs input {
    cursor: pointer;
  }
  main {
    width: 100%;
    margin: 0 auto;
  }
  .maindisplay {
    width: 100%;
  }
  .keyboard {
    margin-top: 20px;
    height: 80%;
    width: 100%;
  }
  .row1,
  .row2,
  .row3,
  .row4,
  .row5 {
    margin: 0 auto;
    /* border: 1px solid black; */
    width: 100%;
    /* height: 50px; */
  }
  .btn {
    width: 60px;
    height: 40px;
    margin: 10px;
    font-size: 32px;
  }
  .row5 input {
    width: 140px;
    height: 35px;
  }
  .attribution {
    margin-top: 40px;
    margin-bottom: 10px;
  }
}

@media only screen and (max-height: 600px) and (max-width: 700px) {
  .keyboard {
    margin-top: 20px;
    height: 100%;
  }
  .attribution {
    margin-top: 140px;
    margin-bottom: 20px;
  }
}