@layer reset, base, layout, components;

@font-face {
  font-family: "Saira Condensed";
  src: url("/fonts/saira-condensed-latin-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Saira Condensed";
  src: url("/fonts/saira-condensed-latin-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Saira Condensed";
  src: url("/fonts/saira-condensed-latin-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Saira Stencil One";
  src: url("/fonts/saira-stencil-one-latin-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;

  --sans: "Saira Condensed", system-ui, sans-serif;
  --mono: ui-monospace, menlo, consolas, monospace;
  --paper: light-dark(#f4f4f1, #101114);
  --dim: light-dark(#e9e9e4, #191a1e);
  --line: light-dark(#c9c9c3, #2c2d34);
  --ink: light-dark(#3d3d42, #b4b6c0);
  --ink-strong: light-dark(#101114, #f2f3f6);
  --ink-faint: light-dark(#84868e, #7c7f8a);
  --accent: #d2202f;
  --cap: light-dark(#101114, #e8e9ec);
  --cap-ink: light-dark(#f4f4f1, #101114);
  --wide: 74rem;
  --gap: clamp(1rem, 2.5vw, 2rem);

  font-size: clamp(100%, 0.93rem + 0.35vw, 112.5%);
}

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
  }

  img,
  video,
  svg,
  canvas {
    display: block;
    max-width: 100%;
    height: auto;
  }

  iframe,
  embed,
  object {
    max-width: 100%;
  }

  input,
  button {
    font: inherit;
  }

  ul[class],
  ol[class] {
    list-style: none;
    padding: 0;
  }
}

@layer base {
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.7;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow-wrap: break-word;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--ink-strong);
    text-wrap: balance;
  }

  h1 {
    font-size: clamp(2.1rem, 1.2rem + 4vw, 4rem);
    line-height: 0.98;
    text-transform: uppercase;
    margin-block-end: 0.8em;
  }

  h2 {
    font-size: clamp(1.45rem, 1.2rem + 1.2vw, 1.9rem);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-inline-start: 6px solid var(--accent);
    padding-inline-start: 0.5em;
  }

  h3 {
    font-size: clamp(1.2rem, 1.05rem + 0.7vw, 1.45rem);
    font-weight: 600;
    text-transform: uppercase;
  }

  h4 {
    font-size: 1.05rem;
  }

  h2,
  h3,
  h4 {
    margin-block: 1.6em 0.6em;
  }

  p {
    margin-block-end: 1em;
    text-wrap: pretty;
  }

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

    &:hover {
      color: var(--accent);
    }
  }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  ::selection {
    background: var(--accent);
    color: #fff;
  }

  hr {
    border: 0;
    border-block-start: 1px solid var(--line);
    margin-block: 2.5em;
  }

  code,
  kbd,
  samp {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--dim);
    border-radius: 0.3em;
    padding: 0.15em 0.4em;
  }

  pre {
    font-family: var(--mono);
    font-size: 0.8rem;
    line-height: 1.7;
    padding: 1em 1.25em;
    overflow-x: auto;
    margin-block-end: 1.5em;
  }

  pre code {
    background: none;
    padding: 0;
    font-size: 1em;
  }
}

@layer layout {
  .site-header {
    background: var(--cap);
    border-block-end: 4px solid var(--accent);
  }

  .navigation-wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 2rem;
    max-width: var(--wide);
    margin-inline: auto;
    padding: 0.8rem var(--gap);
  }

  .site-name {
    font-weight: 700;
    font-size: 1.35rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;

    a {
      color: var(--cap-ink);
    }
  }

  .hero {
    position: relative;

    img {
      width: 100%;
    }
  }

  .site-header,
  .site-footer,
  #main {
    width: 100%;
  }

  #main {
    max-width: var(--wide);
    margin-inline: auto;
    padding: calc(var(--gap) * 1.5) var(--gap);
    flex: 1;
  }

  @media (width >= 56em) {
    #main {
      display: grid;
      grid-template-columns: 15rem minmax(0, 40em);
      gap: var(--gap) calc(var(--gap) * 1.5);
      justify-content: center;

      & > .author-side {
        grid-column: 1;
      }

      & > article,
      & > #index {
        grid-column: 2;
      }

      & > #not-found {
        grid-column: 1 / -1;
      }
    }
  }

  article,
  #index {
    min-width: 0;
  }

  .site-footer {
    border-block-start: 4px solid var(--accent);
    max-width: var(--wide);
    margin-inline: auto;
    padding: 1.5rem var(--gap) 2.5rem;
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-faint);

    p {
      margin: 0;
    }

    a {
      color: var(--ink-faint);
    }
  }
}

@layer components {
  #site-nav {
    ul {
      display: flex;
      flex-wrap: wrap;
      gap: 0.25rem 1.75rem;
      padding: 0;
      list-style: none;
      font-weight: 600;
      font-size: 0.78rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
    }

    a {
      color: color-mix(in srgb, var(--cap-ink) 62%, transparent);

      &:hover {
        color: var(--cap-ink);
      }
    }
  }

  /* markup comes from nav.js */
  .nav-toggle {
    display: none;
    align-items: center;
    gap: 0.6em;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--cap-ink);
    background: none;
    border: 1px solid color-mix(in srgb, var(--cap-ink) 45%, transparent);
    border-radius: 0.45em;
    padding: 0.5em 0.9em;
    cursor: pointer;

    &:hover {
      border-color: var(--cap-ink);
    }
  }

  .lines {
    position: relative;
    width: 1.1em;
    height: 2px;
    background: currentcolor;
    border-radius: 2px;
    transition: background 0.2s;

    &::before,
    &::after {
      content: "";
      position: absolute;
      inset-inline: 0;
      height: 2px;
      background: currentcolor;
      border-radius: 2px;
      transition:
        top 0.2s,
        transform 0.2s;
    }

    &::before {
      top: -5px;
    }

    &::after {
      top: 5px;
    }
  }

  .nav-toggle.active .lines {
    background: transparent;

    &::before {
      top: 0;
      transform: rotate(45deg);
    }

    &::after {
      top: 0;
      transform: rotate(-45deg);
    }
  }

  @media (width < 48em) {
    .navigation-wrapper {
      position: relative;
    }

    .nav-toggle {
      display: inline-flex;
    }

    #site-nav {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
    }

    #site-nav ul {
      flex-direction: column;
      gap: 0;
      align-self: stretch;
    }

    #site-nav a {
      display: block;
      padding-block: 0.6rem;
    }

    .js #site-nav ul {
      position: absolute;
      inset-inline: 0;
      top: 100%;
      z-index: 10;
      background: var(--cap);
      padding: 0.25rem var(--gap) 0.75rem;
      max-height: 0;
      overflow: hidden;
      visibility: hidden;
      transition:
        max-height 0.3s ease,
        visibility 0.3s;
    }

    .js #site-nav .nav-toggle.active + ul {
      max-height: 40em;
      visibility: visible;
    }
  }

  .author-bio {
    font-size: 0.9rem;

    .bio-photo {
      width: 88px;
      height: 88px;
      border-radius: 50%;
      object-fit: cover;
    }

    .bio-name {
      margin: 0.75rem 0 0.25rem;
      font-weight: 700;
      font-size: 1.1rem;
      line-height: 1.2;
    }

    .bio-facts {
      margin-block-start: 0.5rem;
      color: var(--ink-faint);
      font-size: 0.85rem;
    }
  }

  .author-side {
    display: none;
    text-align: center;

    .bio-photo {
      margin-inline: auto;
    }

    @media (width >= 56em) {
      position: sticky;
      inset-block-start: 2rem;
      display: block;
    }
  }

  .author-bottom {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    border-block-start: 1px solid var(--line);
    padding-block-start: 1.5rem;
    margin-block: 2rem 1rem;

    .bio-photo {
      width: 64px;
      height: 64px;
      flex-shrink: 0;
    }

    @media (width >= 56em) {
      display: none;
    }
  }

  .article-content {
    p > a,
    li > a {
      text-decoration: underline dotted;
      text-decoration-thickness: 1px;
      text-underline-offset: 0.25em;

      &:hover {
        text-decoration-style: solid;
      }
    }
  }

  .article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: -0.4em 0 1.6em;

    li {
      font-family: "Saira Stencil One", var(--sans);
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--ink-strong);
      border: 1px solid var(--line);
      border-radius: 2px;
      background-image:
        repeating-linear-gradient(90deg, var(--dim) 0 11px, transparent 11px 12px),
        repeating-linear-gradient(0deg, var(--dim) 0 11px, transparent 11px 12px);
      padding: 0.18em 0.75em;
    }
  }

  .byline {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-faint);

    strong {
      font-weight: 600;
    }
  }

  .article-footer {
    margin-block-start: 2.5em;
  }

  blockquote {
    margin-block: 1.5em;
    padding: 0.35em 1.25em;
    border-inline-start: 8px solid var(--ink-strong);
    background: var(--dim);
    color: var(--ink);
  }

  /* .hero sits flush against the header, never match it here */
  figure:not(.hero) {
    margin-block: 2em;

    img {
      margin-inline: auto;
    }

    figcaption {
      margin-block-start: 0.6rem;
      text-align: center;
      font-size: 0.85rem;
      color: var(--ink-faint);
      padding-inline: 1rem;
    }
  }

  .highlight {
    background: #f2f2ec;
    border: 1px solid var(--line);
    margin-block-end: 1.5em;

    pre {
      margin: 0;
      color: #2c2d31;
      line-height: 1.8;
    }
  }

  @media (prefers-color-scheme: dark) {
    .highlight {
      background: var(--dim);

      pre {
        color: var(--ink);
      }
    }
  }

  pre:not(.highlight pre) {
    background: var(--dim);
    border: 1px solid var(--line);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin-block: 1.5em;
    font-size: 0.9em;
  }

  th,
  td {
    border: 1px solid var(--line);
    padding: 0.35em 0.6em;
    text-align: start;
  }

  th {
    background: var(--dim);
  }

  #index h2,
  #comments h2 {
    margin-block: 0 1rem;
  }

  #index h2 {
    padding-block-end: 0.4rem;
    border-block-end: 4px solid var(--ink-strong);
  }

  #index article {
    display: flow-root;
    padding-block: 1.25rem;
    border-block-end: 1px solid var(--line);

    &:last-child {
      border-block-end: none;
    }

    h3 {
      margin: 0 0 0.25rem;
      font-size: 1.25rem;
    }

    .link {
      text-decoration: underline;
      text-decoration-color: transparent;
      text-decoration-thickness: 2px;
      text-underline-offset: 0.18em;
      transition: text-decoration-color 0.2s ease;

      &:hover {
        text-decoration-color: var(--accent);
      }
    }

    p {
      margin: 0;
    }

    .index-image {
      float: inline-end;
      margin: 0.25rem 0 0.5rem 1.25rem;

      a {
        display: block;
      }

      img {
        width: 12rem;
        border-radius: 0.3em;
      }
    }

    @media (width < 48em) {
      .index-image {
        float: none;
        margin: 0 0 0.75rem;

        img {
          width: 100%;
          max-height: 12rem;
          object-fit: cover;
        }
      }
    }
  }

  #not-found {
    display: grid;
    place-content: center;
    place-items: center;
    gap: 1.75rem;
    min-block-size: 100%;

    @media (width < 48em) {
      padding-block-start: 4rem;
    }

    h1,
    p {
      margin-block: 0;
    }

    .error-code {
      font-family: "Saira Stencil One", var(--sans);
      font-size: clamp(4.5rem, 2rem + 12vw, 9rem);
      line-height: 0.75;
    }

    .error-message {
      font-family: var(--mono);
      font-size: clamp(0.8rem, 0.62rem + 0.75vw, 1rem);
      color: var(--ink-faint);
      white-space: nowrap;
    }

    .error-home {
      padding: 0.5em 1.5em;
      border: 2px solid var(--ink-strong);
      border-radius: 2px;
      font-weight: 600;
    }
  }

  #comments {
    margin-block-start: 3rem;
    padding-block-start: 1.75rem;
    border-block-start: 1px solid var(--line);

    ol {
      list-style: none;
      padding: 0;
    }

    ol ol {
      margin-block-start: 0.75rem;
      padding-inline-start: 1.25rem;
      border-inline-start: 2px solid var(--line);
    }

    .comment-author {
      font-weight: 700;
      margin-inline-end: 0.5em;
    }

    time {
      color: var(--ink-faint);
      font-size: 0.8rem;
    }

    .comment-body {
      margin: 0.35rem 0 1.5rem;

      p {
        margin-block-end: 0.5em;
      }

      pre,
      code {
        font-size: 0.8em;
      }

      pre code {
        font-size: 1em;
      }
    }
  }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  @view-transition {
    navigation: auto;
  }

  @supports (animation-timeline: scroll()) {
    .reading-progress {
      position: fixed;
      inset-block-start: 0;
      inset-inline-start: 0;
      inline-size: 100%;
      block-size: 3px;
      background: var(--accent);
      transform-origin: 0 50%;
      transform: scaleX(0);
      animation: reading-progress-grow linear both;
      animation-timeline: scroll(root block);
      z-index: 100;
    }

    @keyframes reading-progress-grow {
      to {
        transform: scaleX(1);
      }
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}