*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: inherit;
}

:root {
  --max-width: 80ch;
  font-family: Inter, sans-serif;
  font-feature-settings: "calt" 1, "dlig" 1, "frac" 1, "liga" 1, "ss01" 1, "ss03" 1, "zero" 1;

  @media (min-width: 1001px) {
    --uniform-margin: 1.5rem;
  }

  @media (max-width: 1000px) {
    --uniform-margin: 0.75rem;
  }
}

@supports (font-variation-settings: normal) {
  :root {
    font-family: InterVariable, sans-serif;
  }
}

html {
  box-sizing: border-box;
  font-size: 16px;
  overscroll-behavior-y: none;
}

body {
  background-color: var(--uchu-yang);
  color: var(--uchu-yin-9);

  @media (min-width: 1001px) {
    font-size: 1.3rem;
    line-height: 1.44;
  }

  @media (max-width: 1000px) {
    font-size: 1rem;
    line-height: 1.33;
  }

  .undershirt {
    margin-left: auto;
    margin-right: auto;
    max-width: 1500px;

    @media (min-width: 401px) and (max-width: 1600px) {
      padding-left: 2ch;
      padding-right: 2ch;
    }

    @media (max-width: 400px) {
      padding-left: 1ch;
      padding-right: 1ch;
    }
  }

  a {
    &:focus-visible {
      border-color: var(--uchu-blue-4);
      outline: 2px solid var(--uchu-blue-4);
      outline-offset: 3px;
    }
  }

  button {
    &:focus-visible {
      background-color: var(--uchu-blue-4);
      color: var(--uchu-yang);
      outline: none;
    }
  }

  > footer {
    border-bottom: 2px solid var(--uchu-gray-1);
    font-size: 0.8rem;

    a {
      background-color: var(--uchu-gray-1);
      color: var(--uchu-yin-7);
      display: inline-flex;
      font-weight: 700;
      padding: 1ch 2ch;
      text-decoration: none;
    }
  }
}

header {
  border-bottom: 2px solid var(--uchu-gray-1);
  position: relative;
  text-transform: lowercase;
  width: 100%;
  z-index: 1;

  @media (min-width: 901px) {
    padding: 1ch 2ch;
  }

  @media (max-width: 900px) {
    padding-bottom: 1ch;
    padding-top: 1ch;
  }

  .undershirt {
    align-items: center;
    display: flex;
    flex-direction: row;
    justify-content: space-between;

    @media (min-width: 401px) {
      gap: 2ch;
    }

    @media (max-width: 400px) {
      gap: 1ch;
    }

    > a {
      display: flex;
    }
  }

  a {
    svg {
      @media (min-width: 601px) {
        width: 10rem;

        &.mark {
          display: none;
        }
      }

      @media (max-width: 600px) {
        width: 2.5rem;

        &.full {
          display: none;
        }
      }
    }
  }

  nav {
    @media (max-width: 900px) {
      width: 100%; height: 2rem;
      bottom: -2rem; left: 0;

      align-items: center;
      background-color: var(--uchu-gray-1);
      display: flex;
      position: absolute;

      @media (min-width: 401px) {
        padding-left: 2ch;
        padding-right: 2ch;
      }

      @media (max-width: 400px) {
        padding-left: 1ch;
        padding-right: 1ch;
      }
    }

    ul {
      display: flex;
      flex-direction: row;
      list-style-type: none;

      @media (min-width: 901px) {
        gap: 1ch;
      }

      @media (max-width: 900px) {
        gap: 2ch;
      }
    }

    a {
      color: inherit;
      font-weight: 700;
      text-decoration: none;

      &[aria-current] {
        background-color: var(--uchu-pink-1);
        border-bottom: 2px solid var(--uchu-pink-4);
      }
    }
  }

  button {
    color: inherit;

    @media (min-width: 901px) {
      display: none;
    }

    svg {
      width: 1.5rem;
    }
  }
}

form[role="search"] {
  display: flex;

  @media (min-width: 901px) {
    width: 25ch;
  }

  @media (max-width: 900px) {
    width: 100%;
  }

  input {
    flex: 1;
  }

  button {
    font-size: 1rem;
    padding-left: 1ch;
    padding-right: 1ch;
    text-transform: lowercase;

    &:not(:focus-visible) {
      background-color: var(--uchu-gray-3);
      color: var(--uchu-yin-8);
    }
  }
}

.content {
  @media (max-width: 900px) {
    padding-top: 2.5rem;
    position: relative;
  }

  &:has(nav) {
    @media (min-width: 901px) {
      display: grid;
      grid-template-areas:
        "sidebar content"
        "sidebar footer";
      grid-template-columns: 1fr 3fr;

      > main {
        padding-left: 2ch;
      }
    }

    @media (min-width: 1401px) {
      ~ footer a {
        margin-left: 35ch;
      }
    }

    @media (min-width: 901px) and (max-width: 1400px) {
      ~ footer a {
        margin-left: 23ch;
      }
    }
  }

  > nav {
    &:first-of-type {
      @media (min-width: 901px) {
        border-right: 2px solid var(--uchu-gray-1);
        grid-area: sidebar;
        min-width: 250px;
        padding: 3.3rem 1rem 3rem 0;
      }

      @media (max-width: 900px) {
        top: calc(2rem - 2px); left: 0;

        background-color: var(--uchu-yang);
        padding: 1rem;
        position: absolute;
        width: 100%;

        &:not(.active) {
          display: none;
        }

        &.active {
          z-index: 11;
        }
      }

      section:first-of-type {
        h2 {
          margin: 0;
        }
      }
    }

    &[aria-labelledby="on-this-page"] {
      top: 2rem; right: 0;

      background-color: var(--uchu-yang);
      border: 1px solid var(--uchu-gray-1);
      box-shadow: 5px 5px var(--uchu-gray-3);
      display: none;
      padding: 0 2ch 2ch;
      position: absolute;
    }
  }

  > main {
    grid-area: content;
    width: 100%;

    article {
      padding-bottom: 2rem;

      ol, p, ul {
        margin-bottom: var(--uniform-margin);
      }
    }

    a {
      position: relative;
      z-index: 1;
    }

    p:has([data-tag-btn]) {
      background-color: var(--uchu-gray-1);
      display: flex;
      gap: 1ch;
      overflow-x: auto;
      padding: 1ch 1ch 1ch 2ch;
      white-space: nowrap;

      [data-tag-btn] {
        &:not(:focus-visible) {
          &:not([aria-pressed="true"]) {
            color: var(--uchu-yin-3);
          }

          &[aria-pressed="true"] {
            color: inherit;
          }
        }
      }
    }

    li {
      &.lint-rule-box {
        border: 2px solid var(--uchu-gray-1);
        list-style-type: none;
        margin-inline-start: -1.35rem;
        padding: 1rem;
        width: calc(100% + 1.35rem);

        &:not(:last-of-type) {
          @media (min-width: 1001px) {
            margin-bottom: 1rem;
          }

          @media (max-width: 1000px) {
            margin-bottom: 0.5rem;
          }
        }

        p {
          margin: 0;
        }
      }
    }

    footer {
      &:empty {
        display: none;
      }

      border-top: 2px solid var(--uchu-gray-1);
      padding-bottom: 3rem;
      padding-top: 2rem;

      nav {
        align-items: center;
        display: flex;
        flex-direction: row;
        gap: 2ch;
        padding-top: var(--uniform-margin);
      }
    }
  }

  h1, h2, h3, h4, h5, h6 {
    letter-spacing: 0.025ch;
    text-transform: lowercase;
  }

  h2, h3, h4, h5, h6 {
    font-weight: 400;
    margin-top: var(--uniform-margin);
  }

  h2, h3,
  li,
  p {
    > code {
      background-color: var(--uchu-yellow-1);
    }
  }

  h1 {
    font-weight: 300;

    @media (min-width: 1001px) {
      font-size: 3rem;
    }

    @media (max-width: 1000px) {
      font-size: 2rem;
    }
  }

  ol,
  p,
  ul {
    font-weight: 500;
    text-wrap: pretty;
  }

  ol,
  ul {
    list-style-position: outside;
    margin-inline-start: 1.35rem;
  }

  table {
    border: 1px solid var(--uchu-gray-1);
    border-collapse: collapse;
    box-shadow: 5px 5px var(--uchu-pink-4);
    margin-bottom: var(--uniform-margin);
    max-width: var(--max-width);
    text-align: left;
    width: 100%;

    thead {
      background-color: var(--uchu-gray-1);
    }

    td,
    th {
      padding: 0.5ch 2ch;

      code {
        background-color: var(--uchu-yellow-1);
      }
    }

    tbody tr:nth-child(2n) {
      background-color: var(--uchu-gray-1);
    }
  }

  strong {
    font-weight: 800;
  }

  a {
    border-bottom: 2px solid var(--uchu-pink-4);
    color: inherit;
    text-decoration: none;

    &:hover {
      background-color: oklch(var(--uchu-pink-1-raw) / 50%);
    }
  }
}

p {
  label {
    align-items: center;
    display: flex;
    flex-direction: row;
    gap: 1ch;
    white-space: nowrap;
    width: 100%;

    @media (min-width: 1001px) {
      margin: 1rem 0;
    }

    @media (max-width: 1000px) {
      margin: 0 0 0.5rem;
    }

    p & {
      background-color: var(--uchu-gray-1);
      padding: 1ch 1ch 1ch 2ch;
    }

    input {
      width: 100%;
    }
  }
}

input {
  appearance: none;
  background-color: var(--uchu-yang);
  border: 1px solid;
  border-radius: 0;
  font-size: inherit;
  padding: 0.5ch 1ch;

  &:not(:focus-visible) {
    border-color: var(--uchu-gray-3);
  }

  &:focus-visible {
    border-color: var(--uchu-blue-4);
    outline: none;
  }
}

code {
  font-family: "IBM Plex Mono", monospace;
}

pre {
  background-color: var(--uchu-gray-1);
  padding: 2ch;

  code {
    .hl-deleted {
      background-color: var(--uchu-red-1);
      color: var(--uchu-red-9);
    }

    .hl-inserted {
      background-color: var(--uchu-green-1);
      color: var(--uchu-green-9);
    }
  }
}

button {
  appearance: none;
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
}

.ende-tabs {
  margin-bottom: var(--uniform-margin);
  padding-top: 1rem;

  .ende-tabs-buttons {
    display: flex;
    flex-direction: row;
    list-style-type: none;
    margin: 0;
    padding-left: 0.9ch;

    button {
      padding: 0 1ch 0.25rem;

      &:not(:focus-visible) {
        &[data-active="false"] {
          color: var(--uchu-yin-2);
        }

        &[data-active="true"] {
          color: inherit;
        }
      }
    }
  }

  .ende-tabs-content {
    [data-active="false"] {
      display: none;
    }
  }
}

figure.code-block {
  max-width: calc(var(--max-width) + 5px);
  padding-right: 5px;

  &:not(:hover) {
    figcaption {
      box-shadow: 5px 5px var(--uchu-pink-4);
    }
  }

  &:hover {
    figcaption {
      box-shadow: 2.5px 2.5px var(--uchu-pink-4);
    }
  }

  figcaption {
    background-color: var(--uchu-gray-1);
    display: inline-flex;
    font-weight: 700;
    padding: 1ch 2ch 0;
    transition: box-shadow 0.2s;
  }
}

.code-block {
  margin-bottom: var(--uniform-margin);
  overflow: hidden;
  position: relative;
  width: 100%;

  &:not(:hover) {
    button {
      color: var(--uchu-yin-2);
    }
  }

  &:not(figure) {
    max-width: var(--max-width);
    transition: box-shadow 0.2s;

    &:not(:hover) {
      box-shadow: 5px 5px var(--uchu-pink-4);
    }

    &:hover {
      box-shadow: 2.5px 2.5px var(--uchu-pink-4);
    }
  }

  pre {
    overflow-x: auto;
  }

  button {
    top: 0; right: 0;

    background-color: oklch(var(--uchu-gray-1-raw) / 75%);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.5rem;
    position: absolute;
    text-transform: uppercase;
    z-index: 10;

    svg {
      inline-size: 1rem;
    }
  }
}

.markdown-alert {
  margin-bottom: var(--uniform-margin);
  max-width: var(--max-width);
  transition: box-shadow 0.2s;
  width: 100%;

  &.markdown-alert-caution {
    &:not(:hover) {
      box-shadow: 5px 5px var(--uchu-orange-4);
    }

    &:hover {
      box-shadow: 2.5px 2.5px var(--uchu-orange-4);
    }

    .markdown-alert-title {
      background-color: var(--uchu-orange-1);
      color: var(--uchu-orange-9);
    }

    p:last-of-type {
      border-color: var(--uchu-orange-1);
    }
  }

  &.markdown-alert-note {
    &:not(:hover) {
      box-shadow: 5px 5px var(--uchu-gray-4);
    }

    &:hover {
      box-shadow: 2.5px 2.5px var(--uchu-gray-4);
    }

    .markdown-alert-title {
      background-color: var(--uchu-gray-1);
      color: var(--uchu-gray-9);
    }

    p:last-of-type {
      border-color: var(--uchu-gray-1);
    }
  }

  &.markdown-alert-tip {
    &:not(:hover) {
      box-shadow: 5px 5px var(--uchu-green-4);
    }

    &:hover {
      box-shadow: 2.5px 2.5px var(--uchu-green-4);
    }

    .markdown-alert-title {
      background-color: var(--uchu-green-1);
      color: var(--uchu-green-9);
    }

    p:last-of-type {
      border-color: var(--uchu-green-1);
    }
  }

  p {
    &.markdown-alert-title {
      margin: 0; padding: 1ch 2ch;
      text-transform: uppercase;
    }

    &:not(.markdown-alert-title) {
      border-left: 1px solid;
      padding: 2ch;
    }

    &:last-of-type {
      border-bottom: 1px solid;
    }
  }
}