styles.css

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Kumbh+Sans:wght@300&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300&display=swap');


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

body {
  font-family: "Nunito Sans", sans-serif;
  background-image: url(https://4kwallpapers.com/images/wallpapers/macos-big-sur-apple-layers-fluidic-colorful-dark-wwdc-2020-5120x2880-1432.jpg);
  background-size: cover;
  overflow-x: hidden;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  width: 100%;
  height: 100%;
}

.link,
a {
  font-weight: 500;
  font-size: 16px;
  color: #232729;
  text-decoration: none;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 10%;
  z-index: 200000;
  width: 100%;
  transition: 0.2s ease;
  backdrop-filter: blur(12px);
  color: #fafafa;
  background:rgba(16 18 27 / 40%);
  border-bottom: 1px solid rgba(113 119 144 / 25%);;
}

header h2 {
  transition: 0.2s ease;
}

.nav__links i {
  vertical-align: top;
}

header h2 i:hover {
  transition: 0.2s ease;
  color: #276ef1;
}

.sticky {
  position: fixed;
  top: 0;
  width: 100%;
  transition: 0.2s ease;
  box-shadow: 1px 4px 9px rgba(0, 0, 0, 0.2);
}

.title-wrapper {
  margin-top: 50px;
}

.sticky + .wrapper {
  padding-top: 60px;
}

.nav__links {
  float: right;
  list-style: none;
  position: relative;
}

.nav__links li {
  display: inline-block;
  padding: 1px 20px;
}

.nav__links .link {
  transition: all 0.3s ease 0s;
  color: #fafafa;
}

.nav__links .link:hover {
  color: #276ef1;
  text-decoration: none;
}

.sub-menu1 {
  display: none;
}

.nav__links li .sub-menu1 ul li a {
  transition: 0.3s ease;
}

.nav__links li:hover .sub-menu1 {
  display: block;
  position: absolute;
  margin-top: 1px;
  margin-left: -15px;
  z-index: 1000;
}

.nav__links li:hover .sub-menu1 ul {
  display: flex;
  flex-direction: column;
  margin: 10px;
  border-radius: 2px;
  box-shadow: 1px 2px 2px rgb(0 0 0 / 10%), -1px -1px 2px rgb(0 0 0 / 8%);
}

.nav__links li:hover .sub-menu1 ul li {
  width: 280px;
  padding: 10px;
  z-index: 1;
  border-bottom: 1px solid #e8e8e8;
  background: #f6f8fa;
  text-align: left;
}

.nav__links li:hover .sub-menu1 ul li a {
  color: #555;
  font-weight: 400;
}

.nav__links li:hover .sub-menu1 ul li:last-child {
  border-bottom: none;
}

.nav__links li:hover .sub-menu1 ul li:hover {
  cursor: pointer;
  transition: 0.2s ease;
  color: #276ef1;
  text-decoration: none;
  background: rgb(231, 231, 231);
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.title-wrapper h1 {
  position: relative;
  bottom: 20px;
  text-shadow: 1px 4px 9px rgba(0, 0, 0, 0.2);
}

/* main section starts here */

.wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  height: 100%;
  margin-top: 100px;
  width: 100%;
  border-radius: 14px;
}

/* first select menu */

.select-box {
  display: flex;
  width: 517px;
  flex-direction: column;
  z-index: 1;
  position: absolute;
}

.select-box .options-container {
  background: rgba(16 18 27 / 40%);;
  color: #f5f6fa;
  width: 100%;
  max-height: 0;
  opacity: 0;
  transition: all 0.4s;
  border-radius: 8px;
  overflow: hidden;
  order: 1;
  position: relative;
}

.selected {
  background: rgba(16 18 27 / 40%);
  border-radius: 5px;
  margin-bottom: 8px;
  color: #f5f6fa;
  position: relative;
  order: 0;
}

.selected::after {
  content: "";
  background: url(./arrow-down.svg);
  background-size: contain;
  background-repeat: no-repeat;
  position: absolute;
  height: 100%;
  width: 32px;;
  right: 10px;
  top: 5px;
  transition: all 0.4s;
}

.select-box .option,
.selected {
  padding: 12px 24px;
  cursor: pointer;
  transition: 0.2s ease;
}

.select-box .option:hover {
  background: rgba(6 18 27 / 40%);;
  transition: 0.3s ease;
}

.select-box label {
  cursor: pointer;
}

.select-box .option .radio {
  display: none;
}

.select-box .options-container.active {
  max-height: 240px;
  opacity: 1;
  width: 100%;
  border-radius: 5px;
  overflow-y: scroll;
  z-index: 1;
}

.select-box .options-container.active + .selected::after {
  transform: rotateX(180deg);
  top: -6px;
}

.select-box .options-container::-webkit-scrollbar {
  width: 8px;
  background-color: #0d141f;
  border-radius: 0 8px 8px 0;
}

.select-box .options-container::-webkit-scrollbar-thumb {
  background: #525861;
  border-radius: 0 8px 9px 0;
}

/* first select menu ends here */

.input {
  resize: none;
  border: 2px solid rgba(113 119 144 / 25%);
  outline: none;
  border-radius: 7px;
  padding: 7px 12px;
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  font-size: 1.3em;
  position: relative;
  top: 60px;
  color: #fafafa;
  transition: 0.3s ease;
  backdrop-filter: blur(12px);
  background: rgb(146 151 179 / 13%);
  box-shadow:  -1px 3px 8px -1px rgba(0, 0, 0, 0.2);
}

.input::placeholder {
  font-weight: 500;
  color: #9f9f9f;
}

.input:focus {
  background:  rgba(16 18 27 / 40%);
}

.output {
  resize: none;
  border: 2px solid rgba(113 119 144 / 25%);
  outline: none;
  height: 326px;
  width: 517px;
  border-radius: 7px;
  padding: 7px 12px;
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  font-size: 1.3em;
  position: relative;
  top: 60px;
  cursor: pointer;
  color: #fafafa;
  backdrop-filter: blur(12px);
  background: rgb(146 151 179 / 13%);
  box-shadow:  -1px 3px 8px -1px rgba(0, 0, 0, 0.2);
}

.output .error {
  color: rgb(167, 56, 56);
}

.output-value::selection {
  background-color: #fff;
}

/* second select menu starts here */

.select-box1 {
  display: flex;
  width: 517px;
  flex-direction: column;
  z-index: 1;
  position: absolute;
}

.select-box1 .options-container1 {
  background: rgba(16 18 27 / 40%);;
  color: #f5f6fa;
  width: 100%;
  max-height: 0;
  opacity: 0;
  transition: all 0.4s;
  border-radius: 8px;
  overflow: hidden;
  order: 1;
  position: relative;
}

.selected1 {
  background: rgba(16 18 27 / 40%);
  border-radius: 5px;
  margin-bottom: 8px;
  color: #f5f6fa;
  position: relative;
  order: 0;
}

.selected1::after {
  content: "";
  background: url(./arrow-down.svg);
  background-size: contain;
  background-repeat: no-repeat;
  position: absolute;
  height: 100%;
  width: 32px;;
  right: 10px;
  top: 5px;
  transition: all 0.4s;
}

.select-box1 .option1,
.selected1 {
  padding: 12px 24px;
  cursor: pointer;
  transition: 0.2s ease;
}

.select-box1 .option1:hover {
  background: rgba(6 18 27 / 40%);
  transition: 0.3s ease;
}

.select-box1 label {
  cursor: pointer;
}

.select-box1 .option1 .radio {
  display: none;
}

.select-box1 .options-container1.active {
  max-height: 240px;
  opacity: 1;
  width: 100%;
  border-radius: 5px;
  overflow-y: scroll;
  z-index: 1;
}

.select-box1 .options-container1.active + .selected1::after {
  transform: rotateX(180deg);
  top: -6px;
}

.select-box1 .options-container1::-webkit-scrollbar {
  width: 8px;
  background-color: #0d141f;
  border-radius: 0 8px 8px 0;
}

.select-box1 .options-container1::-webkit-scrollbar-thumb {
  background: #525861;
  border-radius: 0 8px 9px 0;
}

/* second select menu ends here */

.button-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin: 30px;
}

.converter {
  border: none;
  outline: none;
  padding: 10px 20px;
  color: #fff;
  user-select: none;
  margin: 5px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s ease;
  display: flex;
  margin-bottom: 25px;
  justify-content: center;
  align-items: center;
  font-size: 17px;
  background:rgba(39 110 241 / 40%);
  backdrop-filter: blur(3px);
  font-family: 'Poppins', sans-serif;
  box-shadow: 0px 4px 9px rgba(0, 0, 0, 0.2);
}

.converter:active .icon {
  animation: animate 0.3s ease;
}

.converter:active {
  transform: scale(0.9);
  background:rgba(26 77 172 / 40%);
}

@keyframes animate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.icon {
  height: 30px;
  width: 30px;
  border-radius: 50%;
  background: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 5px;
  background: rgba(39 110 241 / 40%);
  backdrop-filter: blur(5px);
}

.icon i {
  cursor: pointer;
  color: #fafafa;
}


.btn-reset {
  border: none;
  outline: none;
  padding: 10px 24px;
  width: 160px;
  color: #fff;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 17px;
  background:rgba(226 18 27 / 40%);
  backdrop-filter: blur(3px);
  font-family: 'Poppins', sans-serif;
  box-shadow: 0px 4px 9px rgba(0, 0, 0, 0.2);
}

.btn-reset:active {
  transform: scale(0.9);
  background:rgba(119 14 14 / 40%);
}

.btn-reset:active .reset-icon {
  animation: animate1 0.8s ease;
}

.reset-icon {
  background: linear-gradient(to bottom right, #d6a8a8 0%, #e41111 100%);
}

@keyframes animate1 {
  0% {
    transform: scale(1.1);
  }

  25% {
    transform: scale(0.8);
  }

  50% {
    transform: scale(1.1);
  }

  75% {
    transform: scale(0.8);
  }

  100% {
    transform: rotate(0deg);
  }
}

.btn-reset p {
  position: relative;
  left: 10px;
}

.btn-reset .reset-icon {
  margin-left: 18px;
}

.btn-converter i {
  margin: 3px;
}

.tippy-box[data-theme~='bw-gradient'] {
  background: linear-gradient(134deg, #6A98F0 0%, #4961DC 99%);
}

.tippy-box[data-theme~='bw-gradient'][data-placement^='top'] > .tippy-arrow::before {
  border-top-color: rgb(49, 116, 218);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  position: absolute;
  bottom: -40px;
  left: 0;
  opacity: 0;
  border-radius: 7px;
  transition: all 0.5s ease-in-out 0s;
  padding: 11px 15px;
  transition: 0.3s ease;
  background:rgba(16 18 27 / 40%);
}

.card-footer .icon-collection {
  display: flex;
  margin-left: auto;
}

.card-footer .icon-collection i {
  font-size: 14px;
}

.card-footer .icon-collection .icon {
  transition: 0.3s ease;
  margin-right: 20px;
  height: 40px;
  width: 40px;
}

.card-footer .icon-collection .icon:hover {
  transform: scale(1.2);
}

.card-footer .icon-collection .icon:active {
  transform: scale(0.9);
}

.output:hover .card-footer {
  bottom: 0px;
  opacity: 1;
}


.card-footer a:hover {
  transform: scale(1.1);
}

/* accordion starts here */
.accordion {
  margin-top: 80px;
  height: 300px;
  background: #233240;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sub-information {
  width: 800px;
}

.sub-information .contentBox {
  position: relative;
  margin: 10px 20px;
}

.sub-information .contentBox .label-1 {
  position: relative;
  padding: 10px;
  background: #276ef1;
  color: #fff;
  cursor: pointer;
  display: flex;
  border-radius: 2px;
}

.sub-information .contentBox .label-1 .status-circle {
  height: 10px;
  width: 10px;
  border-radius: 50%;
  margin-right: 10px;
  margin-top: 4px;
  background-color: rgb(164, 168, 164);
}

.sub-information .contentBox .label-1::before {
  content: '+';
  position: absolute;
  top: 50%;
  right: 4%;
  transform: translateY(-50%);
  font-size: 1.5em;
}

.sub-information .contentBox.activate .label-1::before {
  content: '-';
}

.sub-information .contentBox.activate .status-circle {
  background-color: rgb(17, 253, 17);
}

.sub-information .contentBox .content {
  position: relative;
  background: #f6f8fa;
  height: 0;
  overflow: hidden;
  transition: 0.4s;
  overflow-y: auto;
}

.sub-information .contentBox.activate .content {
  height: 100px;
  padding: 10px;
  border-radius: 2px;
}

/* media queries */

@media screen and (max-width: 450px) {
  .component {
    width: 340px;
  }

  .wrapper {
    flex-wrap: wrap;
  }

  .select-box,
  .options-container,
  .options-container.active,
  .input {
    width: 340px;
  }

  .button-container {
    position: relative;
    top: 35px;
    margin-bottom: 50px;
  }

  .select-box1,
  .output {
    width: 340px;
  }

  .options-container.active {
    width: 40px;
  }
}