/* Design tokens */

:root {
  --color-text: #333;
  --color-text-light: #666;
  --color-background: #fff;
  --color-background-light: #f9f9f9;
  --color-background-code: #f5f5f5;
  --color-accent: #0066cc;
  --color-accent-hover: #0052a3;
  --color-border: #e0e0e0;

  --font-fallback:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-heading: "Excalifont", var(--font-fallback);
  --font-family-base: "Shantell Sans", var(--font-fallback);
  --font-family-mono:
    "Fira Code", "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas,
    "Courier New", monospace;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  --border-radius: 0.25rem;
  --line-height-base: 1.6;
  --line-height-tight: 1.4;

  --sidebar-width: 300px;
}
/* Base styles and fonts */

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

@font-face {
  font-family: "Shantell Sans";
  src: url("./fonts/ShantellSans-Variable.woff2") format("woff2");
  font-weight: 300 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Fira Code";
  src: url("./fonts/FiraCode-Variable.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 15px;
  line-height: var(--line-height-base);
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text);
  background-color: var(--color-background);
  margin: 0;
  padding: var(--spacing-md);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  line-height: var(--line-height-tight);
  margin-top: var(--spacing-lg);
  margin-bottom: 0;

  &:first-child {
    margin-top: 0;
  }
}

h1 {
  font-size: 2rem;
  font-weight: 700;
}

h2 {
  font-size: 1.625rem;
  font-weight: 600;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

/* Links */
a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;

  &:hover {
    color: var(--color-accent-hover);
    text-decoration-thickness: 2px;
  }

  &:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--border-radius);
  }
}

/* Lists */
ul,
ol {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);

  li {
    margin-bottom: var(--spacing-xs);

    &:last-child {
      margin-bottom: 0;
    }
  }
}

/* Code */
code {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  background-color: var(--color-background-code);
  padding: 0.125em 0.25em;
  border-radius: var(--border-radius);
}

pre {
  font-family: var(--font-family-mono);
  font-size: 0.875rem;
  background-color: var(--color-background-code);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin-top: 0;
  margin-bottom: var(--spacing-sm);

  code {
    background-color: transparent;
    padding: 0;
  }
}

blockquote {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-sm);
  border-left: 3px solid var(--color-border);
  color: var(--color-text-light);
  font-style: italic;
}

details:not(.spoiler) {
  margin-bottom: var(--spacing-sm);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-sm);

  th,
  td {
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
  }

  th {
    font-weight: 600;
    background-color: var(--color-background-light);
  }
}
/* Utilities */

.subtitle {
  color: var(--color-text-light);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

/* Post metadata and taxonomies */
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem;
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.tag-list {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;

  li {
    margin: 0;
  }

  li:not(:last-child)::after {
    content: ",";
  }
}

.taxonomy-list {
  margin: 0;
  padding: 0;
  list-style: none;

  li {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border);
  }
}

.taxonomy-count {
  color: var(--color-text-light);
  white-space: nowrap;
}

/* Page-level navigation */
.page-navigation {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-family-heading);

  > :last-child {
    text-align: right;
  }

  a {
    display: inline-block;
    padding: 0.25rem 0.375rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;

    &:hover {
      background-color: var(--color-background-light);
      text-decoration: underline;
      text-decoration-thickness: 1px;
    }
  }
}

.page-navigation-single {
  display: flex;
  justify-content: center;
}

.page-navigation-status {
  color: var(--color-text-light);
  font-size: 0.875rem;
  white-space: nowrap;
}

/* Footnotes */
.footnotes-list {
  margin-top: 0;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.footnotes-list li {
  margin-bottom: var(--spacing-xs);
  scroll-margin-top: var(--spacing-md);
}

.footnotes-list li:target,
.footnote-reference:target {
  color: var(--color-text);
  background-color: var(--color-background-light);
}

.footnotes-list p {
  display: inline;
}

.footnote-reference {
  margin-left: 0.125em;
  font-size: 0.75em;
  line-height: 0;
  scroll-margin-top: var(--spacing-md);
}

.footnote-reference a,
.footnotes-list a[href^="#fr-"] {
  text-decoration: none;
}

.footnotes-list a[href^="#fr-"] {
  display: inline-block;
  margin-left: 0.25em;
  padding: 0 0.25em;
  border-radius: var(--border-radius);
  font-family: var(--font-fallback);

  &:hover {
    background-color: var(--color-background-light);
  }
}

/* Post title link styling */
a.title-link {
  color: var(--color-text);
  text-decoration: none;

  &:hover,
  &:focus {
    text-decoration: underline;
  }
}
/* Layout */

.layout-grid {
  display: grid;
  grid-template-areas: "content sidebar";
  grid-template-columns: minmax(0, 65ch) var(--sidebar-width);
  column-gap: var(--spacing-xl);
  justify-content: center;
}

.layout-content {
  grid-area: content;
}

.layout-page-title {
  padding: var(--spacing-md) 0;

  > :last-child {
    margin-bottom: 0;
  }
}

.layout-sidebar {
  grid-area: sidebar;
  align-self: start;
  background-color: var(--color-background-light);
  border-radius: var(--border-radius);
}

.layout-blog-title {
  padding: var(--spacing-md);
}

.layout-sidebar-content {
  padding: 0 var(--spacing-md) var(--spacing-md);
}
/* Responsive layout */

@media (max-width: 768px) {
  body {
    padding: var(--spacing-sm);
  }

  .layout-grid {
    grid-template-areas: "sidebar" "content";
    grid-template-columns: minmax(0, 1fr);
  }

  .layout-sidebar {
    margin: calc(-1 * var(--spacing-sm)) calc(-1 * var(--spacing-sm)) 0;
    border-radius: 0;
  }

  .layout-sidebar-content {
    display: none;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.125rem;
  }
}

/* Spoilers */
.spoiler {
  display: inline;
}

.spoiler summary {
  display: inline;
  cursor: pointer;
  list-style: none;
}

.spoiler summary::-webkit-details-marker {
  display: none;
}

.spoiler-mask {
  color: transparent;
  background-color: var(--color-text);
  border-radius: var(--border-radius);
  user-select: none;
}

.spoiler-mask::selection {
  color: var(--color-text);
  background-color: transparent;
}

.spoiler[open] .spoiler-mask {
  display: none;
}

.spoiler-revealed {
  display: none;
}

.spoiler[open] .spoiler-revealed {
  display: inline;
}

.spoiler summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}