:root {
  --font-size: 16px;
  --spacing: 0.25rem;
  --color: oklch(14.38% 0.007 256.88);
  --opposite-color: oklch(99.4% 0 0);
  --soft-color: oklch(91.87% 0.003 264.54);
  --muted-color: #6a7282;
  --background-color: #fff;
  --selection-color: #fff2a8;
}

html.dark {
  --color: oklch(82% 0.007 256.88);
  --opposite-color: oklch(20% 0.005 256.88);
  --soft-color: oklch(30% 0.005 256.88);
  --muted-color: oklch(70% 0.004 264);
  --background-color: oklch(20% 0.005 256.88);
  --selection-color: oklch(45% 0.15 65);
}

@media (min-width: 1440px) {
  :root {
    --font-size: 20px;
  }
}

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

::-moz-selection { /* Code for Firefox */
  background: var(--selection-color);
}

::selection {
  background: var(--selection-color);
}

html {
  font-size: var(--font-size);
}

body {
  background-color: var(--background-color);
  color: var(--color);
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-weight: 300;
  margin: 0;
  padding: 0;
}


.container {
  display: grid;
  min-height: 100dvh;
  grid-template-rows:
    auto 1fr auto;
}

.site-header {
  background-color: var(--background-color);
  border-bottom: 1px solid var(--color);
  display: flex;
  justify-content: center;
  margin-inline: auto;
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 10;

  &  > div {
    align-items: center;
    display: flex;
    justify-content: space-between;
    max-width: 72rem;
    width: 100%;
  }
}

.site-header > div > nav ul {
  align-items: center;
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}


#theme-toggle {
  background: none;
  border: none;
  color: var(--color);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
}

.icon-sun {
  display: none;
}

html.dark .icon-sun {
  display: block;
}

html.dark .icon-moon {
  display: none;
}

main {
  margin-inline: auto;
  width: 100%;
}

.site-main {
  max-width: 36rem;
}

a {
  color: var(--color);
  text-decoration: none;
}


h1, h2, h3, h4, h5, h6,
p  {
  margin-top: 0;
  margin-bottom: 0;
}

.main-section {
  padding-block: calc(var(--spacing) * 12);
  padding-inline: calc(var(--spacing) * 6);
}

@media (min-width: 768px) {
  .main-section {
    padding-block: calc(var(--spacing) * 20);
    padding-inline: initial;
  }
}

article {
  margin-bottom: calc(var(--spacing) * 16);
}

.summary {
  header {
    margin-block-end: calc(var(--spacing) * 2);
  }

  footer {
    margin-top: calc(var(--spacing) * 4);
  }

  h2 {
    font-size: 2.25rem;
    letter-spacing: -1.8px;
    line-height: 1.375;
  }

  p {
    font-size: 1.125rem;
    line-height: 35px;
    margin-block-start: calc(var(--spacing) * 2);
  }

  .time {
    color: var(--muted-color);
    font-size: 1rem;

    time {
      line-height: 30px;
    }
  }
}

.single-post, .page, .archive-main {

  section {
    padding-block: calc(var(--spacing) * 8);
  }

  header {
    padding-inline: calc(var(--spacing) * 8);
  }

  h1 {
    font-size: 3rem;
    letter-spacing: -0.05em;
    line-height: 1;
    margin-top: calc(var(--spacing) * 8);
  }

  h2 {
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 40px;
  }

  .time {
    font-size: 0.875rem;
    margin-bottom: calc(var(--spacing) * 3);

    time {
      line-height: 1.4;
    }
  }

  @media (min-width: 768px) {
    section {
      padding-block: calc(var(--spacing) * 20);
    }

    h1 {
      font-size: 3.75rem;
    }
  }
}

.post-content {
  font-size: 1.25rem;
  line-height: 1.8;
  margin-block-start: calc(var(--spacing) * 8);
  padding-block: calc(var(--spacing) * 8);
  padding-inline: calc(var(--spacing) * 8);
}

.post-content h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1.1;
  margin-top: 1.55556em;
  margin-bottom: .888889em;
}

.post-content p {
  margin-bottom: 1.2em;
}

.post-content a {
  text-decoration: underline;
}

.post-content strong {
  font-weight: 700;
}

.post-content figure {
  text-align: center;
}

.post-content figure img {
  max-width: 100%;
  height: auto;
}

.post-content blockquote {
  border-left: 3px solid var(--color);
  margin-inline: 0;
  padding-inline: calc(var(--spacing) * 6);
  color: var(--muted-color);
  font-style: italic;
}

.site-footer {
  border-top: 1px solid var(--soft-color);
  display: flex;
  justify-content: center;
  margin-inline: auto;
  padding-block: calc(var(--spacing) * 8);
  width: 100%;

  & > div {
    max-width: 72rem;
    width: 100%;
  }

  .footer-row {
    display: flex;
    align-items: center;

    & > span:first-child {
      flex: 1;
    }

    & > span:last-child {
      flex: 1;
    }

    .footer-rss {
      flex: 1;
      text-align: center;
    }
  }
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: calc(var(--spacing) * 4);
  margin-top: calc(var(--spacing) * 8);
  padding-top: calc(var(--spacing) * 4);
  border-top: 1px solid var(--soft-color);

  .post-nav-prev { flex: 1; }
  .post-nav-next { flex: 1; text-align: right; }
}

.site-header > div,
.site-footer > div {
  padding-inline: calc(.25rem * 4);
  padding-block: calc(.25rem * 3);
}

ul ul {
  margin-block-end: calc(var(--spacing) * 12);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 4rem;
  text-align: left;

  thead {
    border-bottom: 1px dashed var(--color);

    th {
      font-weight: 700;
    }
  }

  th,
  td {
    padding-block: calc(var(--spacing) * 2);
  }
}

.opacity-80 {
  opacity: 0.8;
}

.tags {
  margin-top: calc(var(--spacing) * 20);

  .tag {
    border: 2px solid var(--color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 700;
    padding-block: 0.35rem;
    padding-inline: 0.75rem;
  }
}


.text-centered {
  text-align: center;
}

.lastmod {
  background-color: oklab(0.5527 0.18431 0.0636788 / 0.05);
  border-radius: 8px;
  color: rgb(203, 42, 66);
  padding: 0.25rem 0.5rem;
  margin-left: 0.5rem;
  font-size: 0.875rem;
}


html.dark .lastmod {
  background-color: oklab(0.22 0.08 0.02 / 0.3);
  color: oklch(75% 0.15 30);
}

.archive-year {
  margin-bottom: calc(var(--spacing) * 10);

  h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing) * 4);
    opacity: 0.4;
  }
}

.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-item {
  display: flex;
  gap: 1.5rem;
  padding-block: calc(var(--spacing) * 2);
  border-bottom: 1px solid var(--soft-color);
  font-size: 1rem;

  .archive-date {
    color: var(--muted-color);
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
  }
}


.single-post, .page {
  * {
    margin-inline: auto;
    max-width: 48rem;
  }
}

.archive-main {
  h1 {
    margin-bottom: calc(var(--spacing) * 10);
  }
}

.archive-layout {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: calc(var(--spacing) * 16);
  align-items: start;
  padding-inline: calc(var(--spacing) * 8);
}

.archive-sidebar {
  position: sticky;
  top: calc(var(--spacing) * 20);

  h2 {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.4;
    margin-bottom: calc(var(--spacing) * 4);
  }
}

.archive-tags {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.archive-tag {
  font-size: 0.875rem;
  opacity: 0.7;

  &:hover {
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .archive-layout {
    grid-template-columns: 1fr;
  }

  .archive-sidebar {
    position: static;
  }
}