@font-face {
  font-family: "Source Code Pro";
  src: url("../fonts/SourceCodePro-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;
  -webkit-text-size-adjust: 100%;
  --color-bg: #fffff8;
  --color-txt: #262625;
  --color-sub: #757575;
  --spacing-xs: 10px;
  --spacing-sm: 15px;
  --spacing-md: 20px;
  --spacing-lg: 25px;
  --spacing-xl: 30px;
  --spacing-2xl: 40px;
  --spacing-3xl: 50px;
  --smooth: 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f0e10;
    --color-txt: #b4b4b4;
    --color-sub: #868686;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

html,
body {
  font-family:
    "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-weight: 400;
  background-color: var(--color-bg);
  color: var(--color-txt);
  margin: 0;
  padding: 0;
  min-height: 100dvh;
  transition:
    background-color var(--smooth),
    color var(--smooth);
}

.wrapper {
  width: 100dvw;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
    env(safe-area-inset-bottom) env(safe-area-inset-left);
}

header {
  position: sticky;
  inset-block-start: env(safe-area-inset-top);
  z-index: 100;
  background-color: var(--color-bg);
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform var(--smooth);
  &.hide {
    transform: translateY(-100%);
  }
  & h1 {
    margin: 0;
    font-size: 1.5em;
    font-weight: 400;
  }
  & a {
    text-decoration: none;
    color: var(--color-txt);
  }
}

nav {
  display: flex;
  align-items: center;
  font-size: 1.3em;
  gap: var(--spacing-sm);
}

.link,
.contact {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  & a {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--smooth);
    &:hover,
    &:hover svg {
      color: var(--color-sub);
    }
  }
  & svg {
    width: 19px;
    height: 19px;
    color: var(--color-txt);
    transition: color var(--smooth);
  }
}

.menu-toggle {
  display: none;
  &:checked ~ .wrapper {
    overflow: hidden;
    position: fixed;
    width: 100dvw;
    height: 100dvh;
    & .burger-menu .bar:first-child {
      top: 50%;
      transform: translateY(-50%) rotate(45deg);
    }
    & .burger-menu .bar:last-child {
      bottom: 50%;
      transform: translateY(50%) rotate(-45deg);
    }
    & nav {
      opacity: 1;
      pointer-events: auto;
    }
  }
}

.burger-menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  position: relative;
  z-index: 200;
}

.bar {
  width: 100%;
  height: 2px;
  border-radius: 5px;
  background-color: var(--color-txt);
  position: absolute;
  transition:
    transform var(--smooth),
    top var(--smooth),
    bottom var(--smooth);
  &:first-child {
    top: 20%;
  }
  &:last-child {
    bottom: 20%;
  }
}

main {
  flex: 1;
  padding: var(--spacing-lg);
}

.home-wrapper,
.blog-wrapper {
  display: flex;
  flex-direction: column;
}

.intro-accordion {
  max-width: 610px;
  margin-block-end: var(--spacing-3xl);
  & input[type="checkbox"] {
    display: none;
  }
  & input[type="checkbox"]:checked + .accordion-header::after {
    transform: rotate(90deg);
  }
  & input[type="checkbox"]:checked ~ .accordion-content {
    max-height: 120px;
  }
}

.accordion-header {
  cursor: pointer;
  position: relative;
  display: inline-block;
  margin: 0;
  & p {
    color: var(--color-sub);
    line-height: 1.6;
    margin: 0;
    display: inline;
  }
  & span {
    color: var(--color-txt);
  }
  &::after {
    content: ">";
    transition: transform var(--smooth);
    color: var(--color-txt);
    display: inline-block;
  }
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--smooth);
  & p {
    color: var(--color-sub);
    line-height: 1.6;
    margin: var(--spacing-xs) 0 0 0;
  }
  & span {
    color: var(--color-txt);
  }
}

.card-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(305px, 1fr));
  gap: var(--spacing-md);
  max-width: 100%;
  margin: 0 auto;
}

.card-link {
  text-decoration: none;
  color: inherit;
  &:hover img {
    filter: grayscale(0);
  }
}

.card img {
  width: 100%;
  filter: grayscale(1);
  opacity: 0.9;
  transition: filter var(--smooth);
}

.title {
  margin: 2px;
  font-size: 1.1em;
}

.description {
  color: var(--color-sub);
  margin: 2px;
  font-size: 0.9em;
  line-height: 1.6;
}

.blog-intro {
  max-width: 800px;
  margin: 0 auto var(--spacing-3xl);
  & p {
    color: var(--color-sub);
    margin: 0;
    line-height: 1.6;
  }
}

.blog-posts {
  max-width: 800px;
  margin: 0 auto;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.post-link {
  text-decoration: none;
  color: inherit;
  padding: var(--spacing-md) 0;
  border-block-end: 1px solid var(--color-sub);
  & h3 {
    font-size: 1.1em;
    margin: 0 0 5px 0;
    color: var(--color-txt);
    transition: color var(--smooth);
  }
  &:hover h3 {
    color: var(--color-sub);
  }
}

.post-date {
  color: var(--color-sub);
  font-size: 0.9em;
  margin: 0 0 var(--spacing-xs) 0;
}

.post-excerpt {
  color: var(--color-sub);
  margin: 0;
  line-height: 1.6;
}

.blog-post {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
  & h2 {
    font-size: 1.1em;
    color: var(--color-txt);
    margin: 0 0 var(--spacing-xs) 0;
  }
  & p {
    color: var(--color-sub);
    margin-block-end: var(--spacing-md);
  }
}

.back-link {
  color: var(--color-txt);
  text-decoration: none;
  margin-block-start: var(--spacing-xl);
  display: inline-block;
  transition: color var(--smooth);
  &:hover {
    color: var(--color-sub);
  }
}

footer {
  display: flex;
  justify-content: end;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  & p {
    color: var(--color-sub);
    font-size: 0.8em;
    margin: 0;
  }
}

@media (max-width: 768px) {
  .burger-menu {
    display: block;
  }

  nav {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    font-size: 1.5em;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--smooth);
  }

  .link {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2xl);
  }

  .contact {
    position: absolute;
    inset-block-end: var(--spacing-xl);
    inset-inline-start: 50%;
    transform: translateX(-50%);
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-xl);
    & svg {
      width: 22px;
      height: 22px;
    }
  }

  .intro-accordion input[type="checkbox"]:checked ~ .accordion-content {
    max-height: 200px;
  }
}