@import url("https://fonts.googleapis.com/css2?family=Open+Sans&family=Pacifico&display=swap");
html {
  font-size: 10px;
}

body {
  background: linear-gradient(45deg, #1e1e2a 0%, #3f434f 100%);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}

.app {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  width: 100vw;
}

.app__body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  max-width: 850px;
  width: 95%;
  background: rgba(255, 255, 255, 0.42);
  -webkit-box-shadow: 4px 4px 20px 7px rgba(0, 0, 0, 0.25);
          box-shadow: 4px 4px 20px 7px rgba(0, 0, 0, 0.25);
  -webkit-backdrop-filter: blur(4px);
          backdrop-filter: blur(4px);
  border-radius: 2.5rem;
  position: relative;
}

.app__body_header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  padding: 3.4rem;
  width: 100%;
  background: rgba(242, 242, 242, 0.9);
  -webkit-box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
          box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
  border-radius: 25px 25px 0px 0px;
}

.app__body_header h1 {
  font-family: "Pacifico", "Open Sans", sans-serif;
  font-size: 5rem;
  background: -webkit- -webkit-gradient(linear, left top, right top, from(#8a2387), color-stop(#e94057), to(#f27121));
  background: -webkit- linear-gradient(to right, #8a2387, #e94057, #f27121);
  background: -webkit-gradient(linear, left top, right top, from(#8a2387), color-stop(#e94057), to(#f27121));
  background: linear-gradient(to right, #8a2387, #e94057, #f27121);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.app__body_dropdown {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-transform-origin: top center;
          transform-origin: top center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(39, 39, 39, 0.959);
  border-radius: 0 0 2.5rem 2.5rem;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.app__body_dropdown.hidden {
  opacity: 0;
  -webkit-transform: scaleY(0);
          transform: scaleY(0);
  -webkit-transform-origin: top center;
          transform-origin: top center;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.app__body_dropdown-btn {
  display: block;
  position: absolute;
  height: 0.3rem;
  width: 3rem;
  background-color: #000;
  right: 40px;
  border-radius: 0.3rem;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.app__body_dropdown-btn::before, .app__body_dropdown-btn::after {
  position: absolute;
  content: '';
  height: 0.3rem;
  width: 3rem;
  background-color: #000;
  border-radius: 0.3rem;
}

.app__body_dropdown-btn::before {
  top: -8px;
  right: 0;
}

.app__body_dropdown-btn::after {
  top: 8px;
}

.app__body_dropdown-btn.active {
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
  -webkit-transform-origin: center center;
          transform-origin: center center;
}

.app__body_dropdown-btn.active::before {
  top: 0px;
  -webkit-transform: rotate(90deg);
          transform: rotate(90deg);
  -webkit-transform-origin: center center;
          transform-origin: center center;
}

.app__body_dropdown-btn.active::after {
  display: none;
}

.app__body_dropdown h3 {
  text-align: center;
  color: #e2e2e2;
  font-size: 3rem;
  font-family: "Open Sans", sans-serif;
  margin-bottom: 3rem;
  margin-top: 3rem;
}

.app__body_dropdown ul {
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}

.app__body_dropdown ul li {
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}

.app__body_dropdown ul li button {
  width: 90%;
  padding: 2rem;
  font-size: 2rem;
  font-family: "Open Sans", sans-serif;
  color: #e2e2e2;
  background: none;
  border: #ffffff1f 0 0 0.1px 0 solid;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
  border: 0.1px #ffffff1e;
  border-style: solid none solid none;
}

.app__body_dropdown ul li button:hover {
  border: #e94057b9 solid 3px;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.app__body_dropdown ul li button.active {
  background: #e94057b9;
}

.app__body_main {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  position: relative;
  width: 100%;
}

.app__body_dropdown {
  display: none;
}

.app__body_dropdown-btn {
  display: none;
}

.converter {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  width: 80%;
  max-width: 74rem;
  margin: 4rem 0;
}

.converter__container {
  display: -ms-grid;
  display: grid;
  -webkit-column-gap: 0;
          column-gap: 0;
  row-gap: 0;
  -ms-grid-columns: (1fr)[12];
      grid-template-columns: repeat(12, 1fr);
  -ms-grid-rows: (1fr)[7];
      grid-template-rows: repeat(7, 1fr);
  max-width: 74rem;
  width: 100%;
}

.converter__category {
  -ms-grid-column: 3;
      grid-column-start: 3;
  grid-column-end: 11;
  -ms-grid-row: 1;
      grid-row-start: 1;
  grid-row-end: 2;
}

.converter__element {
  background-color: #fff;
  background-color: #e8e8e8;
  border-radius: 1rem;
  padding: 1.4rem 2.8rem;
  font-family: "Open Sans", sans-serif;
  color: #2b2b2b;
  font-size: 2rem;
  -webkit-box-shadow: 2px 3px 5px rgba(0, 0, 0, 0.25);
          box-shadow: 2px 3px 5px rgba(0, 0, 0, 0.25);
}

.converter__input_value {
  -ms-grid-column: 1;
      grid-column-start: 1;
  grid-column-end: 7;
  -ms-grid-row: 3;
      grid-row-start: 3;
  grid-row-end: 4;
}

.converter__input_unit {
  -ms-grid-column: 8;
      grid-column-start: 8;
  grid-column-end: 13;
  -ms-grid-row: 3;
      grid-row-start: 3;
  grid-row-end: 4;
}

.converter__switch-button {
  -ms-grid-column: 10;
      grid-column-start: 10;
  grid-column-end: 11;
  -ms-grid-row: 4;
      grid-row-start: 4;
  grid-row-end: 5;
  height: 30px;
  width: 30px;
  background: none;
  background-image: url(../img/arrow-up-down.svg);
  background-position: center center;
  background-repeat: no-repeat;
  -ms-flex-item-align: center;
      -ms-grid-row-align: center;
      align-self: center;
  -ms-grid-column-align: center;
      justify-self: center;
}

.converter__output_value {
  -ms-grid-column: 1;
      grid-column-start: 1;
  grid-column-end: 7;
  -ms-grid-row: 5;
      grid-row-start: 5;
  grid-row-end: 6;
}

.converter__output_unit {
  -ms-grid-column: 8;
      grid-column-start: 8;
  grid-column-end: 13;
  -ms-grid-row: 5;
      grid-row-start: 5;
  grid-row-end: 6;
}

.converter__button {
  -ms-grid-column: 5;
      grid-column-start: 5;
  grid-column-end: 9;
  -ms-grid-row: 7;
      grid-row-start: 7;
  grid-row-end: 8;
  background: #e5941b;
  color: #fff;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.converter__button:hover {
  -webkit-box-shadow: 1px 2px 5px rgba(0, 0, 0, 0.4);
          box-shadow: 1px 2px 5px rgba(0, 0, 0, 0.4);
  background-color: #dd8e19;
  -webkit-transform: translateY(1.5px);
          transform: translateY(1.5px);
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

.converter__button:active {
  background-color: #d38818;
}

select {
  -webkit-appearance: none;
  -moz-appearance: none;
  -o-appearance: none;
  appearance: none;
  background-image: url("../img/arrow-down.svg");
  background-position: 95% center;
  background-repeat: no-repeat;
}

@media screen and (max-width: 600px) and (orientation: portrait) {
  html {
    font-size: 9px;
  }
  .app__body_dropdown-btn,
  .app__body_dropdown {
    display: block;
  }
  .converter {
    width: 95%;
    height: 100%;
  }
  .converter__container {
    -ms-grid-columns: 1fr;
        grid-template-columns: 1fr;
    -ms-grid-rows: (1fr)[6];
        grid-template-rows: repeat(6, 1fr);
    row-gap: 1rem;
  }
  .converter__category {
    display: none;
  }
  .converter__input_value {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 1;
        grid-row-start: 1;
    grid-row-end: 2;
  }
  .converter__input_unit {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 2;
        grid-row-start: 2;
    grid-row-end: 3;
  }
  .converter__switch-button {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 3;
        grid-row-start: 3;
    grid-row-end: 4;
  }
  .converter__output_value {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 4;
        grid-row-start: 4;
    grid-row-end: 5;
  }
  .converter__output_unit {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 5;
        grid-row-start: 5;
    grid-row-end: 6;
  }
  .converter__button {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 2;
    -ms-grid-row: 6;
        grid-row-start: 6;
    grid-row-end: 7;
  }
  .converter__element {
    width: 100%;
  }
}

@media screen and (max-height: 600px) and (orientation: landscape) {
  .app__body_dropdown-btn,
  .app__body_dropdown {
    display: block;
  }
  .app__body_dropdown ul {
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 1fr 1fr 1fr;
        grid-template-columns: 1fr 1fr 1fr;
  }
  .converter__container {
    row-gap: 1em;
    -ms-grid-columns: (1fr)[11];
        grid-template-columns: repeat(11, 1fr);
    -ms-grid-rows: 1fr 0.1fr 1fr 1fr;
        grid-template-rows: 1fr 0.1fr 1fr 1fr;
  }
  .converter__category {
    display: none;
  }
  .converter__input_value {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 5;
    -ms-grid-row: 1;
        grid-row-start: 1;
    grid-row-end: 2;
  }
  .converter__input_unit {
    -ms-grid-column: 1;
        grid-column-start: 1;
    grid-column-end: 5;
    -ms-grid-row: 3;
        grid-row-start: 3;
    grid-row-end: 4;
  }
  .converter__switch-button {
    -ms-grid-column: 6;
        grid-column-start: 6;
    grid-column-end: 7;
    -ms-grid-row: 2;
        grid-row-start: 2;
    grid-row-end: 3;
    margin: -4rem;
    -webkit-transform: rotate(90deg);
            transform: rotate(90deg);
  }
  .converter__output_value {
    -ms-grid-column: 8;
        grid-column-start: 8;
    grid-column-end: 12;
    -ms-grid-row: 1;
        grid-row-start: 1;
    grid-row-end: 2;
  }
  .converter__output_unit {
    -ms-grid-column: 8;
        grid-column-start: 8;
    grid-column-end: 12;
    -ms-grid-row: 3;
        grid-row-start: 3;
    grid-row-end: 4;
  }
  .converter__button {
    -ms-grid-column: 4;
        grid-column-start: 4;
    grid-column-end: 9;
    -ms-grid-row: 4;
        grid-row-start: 4;
    grid-row-end: 5;
  }
}