:root {
  --font-family: Open Sans, sans-serif;
  --font-weight-light: 100;
  --font-weight-medium: 400;
  --font-weight-bold: 700;
  --font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  --font-size-large: clamp(1.75rem, 5vw, 2.5rem);

  /* Theme */
  --color-text: #1a4d1a;
  --color-bg-primary: #6c3;
  --color-bg-secondary: #09f;
  --color-bg-trans: rgba(255, 255, 255, 0.5);
  --color-hover: #09f;
  --color-primary-filter: invert(24%) sepia(56%) saturate(3207%) hue-rotate(93deg) brightness(93%) contrast(80%);
  --color-secondary-filter: invert(35%) sepia(100%) saturate(4142%) hue-rotate(202deg) brightness(102%) contrast(101%);
}

:root[data-theme="dark"] {
  --color-text: #e0e0e0;
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #2d2d30;
  --color-bg-trans: rgba(40, 40, 40, 0.5);
  --color-hover: #4a90e2;
  --color-primary-filter: invert(88%) sepia(13%) saturate(157%) hue-rotate(169deg) brightness(91%) contrast(88%);
  --color-secondary-filter: invert(73%) sepia(32%) saturate(1735%) hue-rotate(184deg) brightness(101%) contrast(94%);
}

* {
  box-sizing: border-box;
}

html {
  font-family: var(--font-family);
  font-weight: var(--font-weight-light);
  font-size: var(--font-size);
  color: var(--color-text);
  background-color: var(--color-bg-primary);
  -webkit-tap-highlight-color: transparent;
}
body {
  margin: 0;
}

:focus,
:focus-visible {
  outline: 4px solid var(--color-hover);
  outline-offset: 4px;
}

:focus:not(:focus-visible) {
  outline: 0;
  box-shadow: none;
}

.main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100dvh;
  width: 100dvw;
  overflow: hidden;
  padding: 16px;


  &::before,
  &::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: -50%;
    right: -50%;
    background-image: linear-gradient(-60deg, var(--color-bg-primary) 50%, var(--color-bg-secondary) 50%);
    opacity: 0.3;
    z-index: 0;
    animation: slide 5s ease-in-out infinite alternate;
  }

  &::after {
    animation-direction: alternate-reverse;
    animation-duration: 7s;
    opacity: 0.2;
  }
}

.content {
  background-color: var(--color-bg-trans);
  border-radius: 6px;
  display: grid;
  gap: 24px;
  justify-items: center;
  padding: 24px 16px;
  width: min(100%, 650px);
  position: relative;
  z-index: 1;
}

.heading {
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-bold);
  margin: 0;
  text-align: center;
}

.introduction {
  margin: 0;
  text-align: center;

  & p {
    margin: 0;

    &:not(:last-of-type) {
      margin-bottom: 16px;
    }
  }
}

.social-wrapper {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 24px;
}

.social-link {
  display: flex;
  border-radius: 50%;
  padding: 4px;
  
  .social-icon {
    filter: var(--color-primary-filter);
    transition: filter 0.2s ease-in-out;
  }
  
  &:hover .social-icon {
    filter: var(--color-secondary-filter);
  }
}

.theme-picker {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: var(--color-bg-trans);
  border-width: 0;
  border-radius: 50%;
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-family);
  font-size: 1.2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease-in-out;
  z-index: 10;

  &:hover {
    background-color: var(--color-hover);
    color: white;
    transform: scale(1.1);
  }
}

@keyframes slide {
  0% {
    transform:translateX(-25%);
  }
  100% {
    transform:translateX(25%);
  }
}