:root {
  --bg-colour: rgb(32, 32, 32);
  --header-bg-color: white;
  --txt-color: white;
  --trenn1-color: white;
  --btn1-color: white;
  --btn1-color-hover: rgb(128, 128, 128);
  --txt3-color: rgb(128, 128, 128);
}

.light {
  --bg-colour: rgb(255, 255, 255);
  --header-bg-color: rgb(204, 204, 204);
  --txt-color: rgb(0, 0, 0);
  --trenn1-color: rgb(0, 0, 0);
  --btn1-color: rgb(0, 0, 0);
  --btn1-color-hover: rgb(128, 128, 128);
  --txt3-color: rgb(58, 58, 58);
}

html {
  background-color: var(--bg-colour);
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  font-family: Inter, sans-serif;
}

div.header {
  width: 100;
  background-color: var(--header-bg-color);
  top: 0;
  position: sticky;
  animation-name: OU;
  animation-duration: 1s;
  display: flex;
  align-content: center;
  justify-content: center;
}

p.headerfont {
  font-size: 2.5vh;
  font-weight: 3500;
  animation-name: OU;
  animation-duration: 1s;
}

h1.txt1 {
  color: var(--txt-color);
  font-weight: 400;
  font-size: 4vh;
  animation-name: main;
  animation-duration: 1s;
  display: flex;
  justify-content: center;
}

@keyframes main {
  0% {
    opacity: 0;
    transform: translateX(-10px);
  }
  100% {
    opacity: 1;
  }
}

@keyframes OU {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }
  100% {
    opacity: 1;
  }
}

hr.trenn1 {
  width: 50%;
  display: flex;
  align-content: center;
  justify-content: center;
  background: repeating-linear-gradient(
    to right,
    var(--trenn1-color) 0px,
    var(--trenn1-color) 5px,
    transparent 5px,
    transparent 10px
  );
  animation-name: main;
  animation-duration: 1s;
  border: none;
  height: 0.125rem;
}

h1.txt2 {
  color: var(--txt-color);
  font-weight: 350;
  font-size: 3.8vh;
  animation-name: main;
  animation-duration: 1s;
  display: flex;
  justify-content: center;
}

button.btn1 {
  border: 1px var(--btn1-color) solid;
  background: none;
  border-radius: 100px;
  color: var(--btn1-color);
  width: fit-content;
  padding-left: 50px;
  padding-right: 50px;
  justify-content: center;
  display: flex;
  align-self: center;
  font-size: 2.4vh;
  animation-name: main;
  animation-duration: 1s;
  cursor: pointer;
  transition: 0.1s;
  font-weight: 300;
}

button.btn1:hover {
  color: 1px var(--btn1-color-hover) solid;
  color: var(--btn1-color-hover);
}

@media (max-width: 400px) {
  button.btn1 {
    padding-left: 10px;
    padding-right: 10px;
  }
}

hr.trenn2 {
  width: 50%;
  justify-content: center;
  display: flex;
  animation-name: main;
  animation-duration: 1s;
}

p.txt3 {
  color: var(--txt3-color);
  font-weight: 200;
  font-size: 2vh;
  animation-name: main;
  animation-duration: 1s;
  display: flex;
  justify-content: center;
  font-style: italic;
  animation-name: main;
  animation-duration: 1s;
}

button.btn2 {
  border: 1px var(--btn1-color) solid;
  background: none;
  border-radius: 100px;
  color: var(--btn1-color);
  width: fit-content;
  padding-left: 50px;
  padding-right: 50px;
  justify-content: center;
  display: flex;
  align-self: center;
  font-size: 2vh;
  animation-name: main;
  animation-duration: 1s;
  cursor: pointer;
  transition: 0.1s;
  font-weight: 300;
}

.switch {
  position: relative;
  display: block;
  width: 60px;
  height: 34px;
  margin: 0 auto;
  animation-name: main;
  animation-duration: 1s;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

input:checked + .slider {
  background-color: #2196f3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196f3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

* {
  transition:
    background-color 0.4s ease,
    color 0.4s ease,
    border-color 0.4s ease;
}