:root {
  color-scheme: dark;
  --background-color: #16191d;
  --surface-color: #1e2328;
  --text-color: #e9e7e2;
  --muted-color: #a8afb6;
  --code-color: #e1e4e8;
  --accent-color: #f0902f;
  --link-color: #70b3ff;
  --line-color: #3d444d;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --content-width: 42rem;
  --logo-gap: 1.25rem;
  --logo-nav-gap: 1.5rem;
  --gutter: clamp(1rem, 4vw, 1.5rem);
}

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

html {
  min-height: 100%;
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background-color: var(--background-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  line-height: 1.6;
}

.container {
  width: min(100%, var(--content-width));
  margin-inline: auto;
  padding: var(--gutter);
}

/* adjacent containers (header + main + footer) shouldn't stack their padding */
header.container {
  padding-top: 0.4rem;
  padding-bottom: 0;
}

header + .container,
.container + .container {
  padding-top: 0;
}

main {
  font-size: 1.0625rem;
}

main img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

figure {
  margin: 1.5rem 0;
}

figcaption {
  margin-top: 0.5rem;
  color: var(--muted-color);
  font-size: 0.875rem;
}

/* ==========================================================================
   Headings
   ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 2rem;
  margin-bottom: 0.6rem;
  color: var(--text-color);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 {
  font-size: 2rem;
}
h2 {
  font-size: 1.5rem;
}
h3 {
  font-size: 1.25rem;
}
h4 {
  font-size: 1.1rem;
}
h5,
h6 {
  font-size: 1rem;
}

small {
  font-size: 0.875em;
  color: var(--muted-color);
}

p {
  margin-top: 0;
  margin-bottom: 1.1rem;
  text-wrap: pretty;
}

.title h1 {
  margin: 0;
}

/* ==========================================================================
   Links
   ========================================================================== */
a {
  color: var(--link-color);
  text-decoration-line: none;
  text-decoration-thickness: 1px;
  text-decoration-color: color-mix(in srgb, var(--link-color) 75%, transparent);
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-line: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: currentColor;
}

a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ==========================================================================
   Lists
   ========================================================================== */
main ul,
main ol {
  margin: 0 0 1.1rem;
  padding-left: 1.4rem;
  list-style-position: outside;
}

main li + li {
  margin-top: 0.35rem;
}

main li::marker {
  color: var(--accent-color);
}

main ul ul,
main ol ol,
main ul ol,
main ol ul {
  margin-top: 0.35rem;
  margin-bottom: 0;
}

/* ==========================================================================
   Rules, quotes, code, tables
   ========================================================================== */
hr {
  margin: 2rem 0;
  border: none;
  border-top: 2px solid var(--line-color);
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.1rem;
  border-left: 4px solid var(--accent-color);
  color: var(--muted-color);
  font-style: italic;
}

blockquote p:last-child {
  margin-bottom: 0;
}

code {
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background-color: var(--surface-color);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

pre {
  margin: 1.5rem 0;
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--line-color);
  border-radius: 6px;
  background-color: var(--surface-color);
  line-height: 1.5;
  tab-size: 2;
}

pre code {
  display: block;
  padding: 0;
  border-radius: 0;
  background-color: transparent;
  color: var(--code-color);
  font-size: 0.875rem;
}

table {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 1.5rem 0;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--line-color);
  text-align: left;
}

th {
  border-bottom-color: var(--accent-color);
  font-weight: 700;
}

/* ==========================================================================
   Header / nav / footer
   ========================================================================== */
nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav li {
  font-weight: 600;
}

nav a {
  display: inline-block;
  padding: 0.1rem 0;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-block: 2.25rem 1.25rem;
  color: var(--muted-color);
}

footer div {
  width: 100%;
  border-top: 3px solid var(--accent-color);
  padding-top: 0.75rem;
}

/* ==========================================================================
   Blog list
   ========================================================================== */
.blog-list {
  display: flex;
  flex-direction: column;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.blog-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.15rem 1.5rem;
  margin: 0;
  padding: 0.55rem 0;
  border-bottom: 2px solid var(--line-color);
}

.blog-item a {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.35;
}

.blog-item-meta {
  flex-shrink: 0;
  color: var(--muted-color);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Home page
   ========================================================================== */
.index-content .title {
  display: flex;
  align-items: center;
  gap: 1rem;
  /* space above (nav to logo) is slightly larger than below (logo to intro
     text); the 0.1rem offsets the nav link's own vertical padding */
  margin-top: calc(var(--logo-nav-gap) - 0.1rem);
  margin-bottom: var(--logo-gap);
}

.index-content .title img {
  width: 64px;
  height: 64px;
  border-radius: 8px;
}

.index-content h2 {
  padding-top: 1.8rem;
  border-top: 3px solid var(--accent-color);
}

/* ==========================================================================
   Blog index & 404 page
   ========================================================================== */
.blog .title,
.error-404 {
  /* heading above the rule, same 1.8rem spacings as the home page divider */
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
  padding-bottom: 1.8rem;
  border-bottom: 3px solid var(--accent-color);
}

.error-404 .title {
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Blog page
   ========================================================================== */
.blog-page-content .title {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.8rem; /* same gap above the title as the blog index page */
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 3px solid var(--accent-color);
}

.blog-page-content .title h1 {
  margin: 0;
  padding-bottom: 0;
  border-bottom: none;
  font-weight: 700;
}

.blog-page-content .title span {
  color: var(--muted-color);
  font-size: 0.9rem;
}

/* long-form text: reset to 1rem (main's base is slightly larger) */
.blog-page-content p,
.blog-page-content li {
  font-size: 1rem;
}

/* in-post headings */
.blog-page-content h1,
.blog-page-content h2,
.blog-page-content h3,
.blog-page-content h4,
.blog-page-content h5,
.blog-page-content h6 {
  margin: 1.25rem 0 0.5rem;
  font-weight: 500;
}

/* headings get a subtle underline rule */
.blog-page-content h1,
.blog-page-content h2,
.blog-page-content h3,
.blog-page-content h4,
.blog-page-content h5 {
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--line-color);
}

/* ==========================================================================
   Post navigation
   ========================================================================== */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 0.75rem;
  border-top: 2px solid var(--line-color);
  font-size: 0.9375rem;
}

/* ==========================================================================
   Small screens
   ========================================================================== */
@media (max-width: 30rem) {
  main {
    font-size: 1rem;
  }

  .blog-item {
    flex-direction: column;
    align-items: flex-start;
  }

  footer {
    flex-direction: column;
  }
}