/* ---------------------------------------------------------------------------
   Random Ramblings — vanilla CSS, no framework, no build step.
   Light and dark themes share one token set; the legacy Blogger posts get a
   white "paper" card because their markup hard-codes colours for a light page.
--------------------------------------------------------------------------- */

:root {
  color-scheme: light;
  --bg: #fdfcfa;
  --text: #1b1f24;
  --muted: #656d76;
  --border: #e6e4e0;
  --accent: #0b62c4;
  --accent-weak: rgba(11, 98, 196, 0.1);
  --code-bg: #f5f4f1;
  --code-border: #e6e4e0;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 8px 24px rgba(15, 23, 42, 0.05);
  --radius: 14px;
  --wrap: 40rem;
  --wrap-wide: 40rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1116;
  --text: #e7eaee;
  --muted: #98a2b3;
  --border: #242c37;
  --accent: #7db0ff;
  --accent-weak: rgba(125, 176, 255, 0.14);
  --code-bg: #141a22;
  --code-border: #222a34;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0e1116;
    --text: #e7eaee;
    --muted: #98a2b3;
    --border: #242c37;
    --accent: #7db0ff;
    --accent-weak: rgba(125, 176, 255, 0.14);
    --code-bg: #141a22;
    --code-border: #222a34;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

/* --- base ---------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.97rem + 0.15vw, 1.075rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}

.wrap--wide {
  width: min(100% - 2.5rem, var(--wrap-wide));
}

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

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.dot {
  color: var(--border);
  padding: 0 0.35em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.6rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius) 0;
  z-index: 10;
}

.skip-link:focus {
  left: 0;
}

/* --- header -------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  white-space: nowrap;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.15em;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.site-nav a:hover {
  background: var(--accent-weak);
  color: var(--accent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  margin-left: 0.35rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle .icon {
  width: 1.05rem;
  height: 1.05rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }

  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: block;
  }
}

/* --- home ---------------------------------------------------------------- */

main {
  padding-block: 2.5rem 4rem;
}

.hero {
  padding-block: 1rem 2rem;
}

.hero-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.9rem, 1.5rem + 2vw, 2.7rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.hero-lede {
  margin: 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-meta {
  margin: 1rem 0 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-kicker {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.hero--404 {
  padding-block: 4rem;
}

.hero-actions {
  margin: 1.75rem 0 0;
}

.button {
  display: inline-block;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  text-decoration: none;
}

.button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.year-group {
  margin-top: 2.25rem;
}

.year {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

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

.post-item {
  display: grid;
  grid-template-columns: 4.6rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.post-date {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.post-link {
  color: var(--text);
  font-size: 1.02rem;
  text-decoration: none;
}

.post-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* --- generic page -------------------------------------------------------- */

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.6rem, 1.35rem + 1.2vw, 2.2rem);
  letter-spacing: -0.02em;
}

.page-lede {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-weak);
  color: var(--accent);
  font-size: 0.8rem;
  text-decoration: none;
}

.tag:hover {
  text-decoration: underline;
}

.tag-count {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* --- single post --------------------------------------------------------- */

.post-header {
  margin-bottom: 2rem;
}

.post-title {
  margin: 0 0 0.6rem;
  font-size: clamp(1.8rem, 1.45rem + 1.8vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.post-meta time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.post-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.post-body {
  overflow-wrap: break-word;
}

.post-body > :first-child {
  margin-top: 0;
}

.post-body h2,
.post-body h3,
.post-body h4,
.post-body h5,
.post-body h6 {
  margin: 1.9em 0 0.55em;
  line-height: 1.3;
  letter-spacing: -0.015em;
  scroll-margin-top: 5rem;
}

.post-body h2 {
  font-size: 1.45rem;
}

.post-body h3 {
  font-size: 1.2rem;
}

.post-body h4 {
  font-size: 1.05rem;
}

.post-body p,
.post-body ul,
.post-body ol,
.post-body blockquote,
.post-body pre,
.post-body table,
.post-body figure {
  margin: 0 0 1.15rem;
}

.post-body ul,
.post-body ol {
  padding-left: 1.4rem;
}

.post-body li + li {
  margin-top: 0.3rem;
}

.post-body li > ul,
.post-body li > ol {
  margin-top: 0.3rem;
  margin-bottom: 0.3rem;
}

.post-body img,
.post-body video,
.post-body iframe {
  max-width: 100%;
  height: auto;
}

.post-body img {
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.post-body hr {
  margin: 2.5rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.post-body blockquote {
  padding: 0.75rem 1.15rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  background: var(--accent-weak);
  color: var(--text);
}

.post-body blockquote > :last-child {
  margin-bottom: 0;
}

.post-body code {
  padding: 0.12em 0.35em;
  border: 1px solid var(--code-border);
  border-radius: 6px;
  background: var(--code-bg);
  font-family: var(--font-mono);
  font-size: 0.86em;
}

.post-body pre {
  position: relative;
  padding: 1rem 1.1rem;
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  background: var(--code-bg);
  font-size: 0.85rem;
  line-height: 1.55;
  /* Soft-wrap long lines: plenty of posts here are config files and prose-like
     snippets where horizontal scrolling hides content. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 4;
  overflow-x: auto;
}

.post-body pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: 1em;
}

.post-body table {
  display: block;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  overflow-x: auto;
}

.post-body th,
.post-body td {
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  text-align: left;
}

.post-body thead th {
  background: var(--code-bg);
}

.copy-button {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.post-body pre:hover .copy-button,
.copy-button:focus-visible {
  opacity: 1;
}

@media (hover: none) {
  .copy-button {
    opacity: 1;
  }
}

/* Posts written for a white page (Blogger-era inline colours) stay readable in
   dark mode by sitting on their own paper card. */
.post-body[data-legacy="true"] {
  --bg: #ffffff;
  --text: #1b1f24;
  --muted: #5c6470;
  --border: #e6e4e0;
  --accent: #0b62c4;
  --accent-weak: rgba(11, 98, 196, 0.1);
  --code-bg: #f5f4f1;
  --code-border: #e6e4e0;
  padding: clamp(1rem, 3vw, 1.75rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow);
}

.post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.75rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
}

.post-nav-link:hover {
  border-color: var(--accent);
}

.post-nav-link--next {
  text-align: right;
}

.post-nav-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.post-nav-title {
  color: var(--text);
}

/* --- footer -------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-inner p {
  margin: 0;
}

/* --- small screens ------------------------------------------------------- */

@media (max-width: 34rem) {
  .header-inner {
    min-height: 3.25rem;
  }

  .site-nav {
    gap: 0.1rem;
  }

  .site-nav a {
    padding: 0.3rem 0.45rem;
    font-size: 0.85rem;
  }

  .theme-toggle {
    width: 1.9rem;
    height: 1.9rem;
    margin-left: 0.2rem;
  }

  .post-item {
    grid-template-columns: 1fr;
    gap: 0.15rem;
    padding-block: 0.6rem;
  }

  main {
    padding-block: 1.75rem 3rem;
  }
}

@media (max-width: 24rem) {
  .brand {
    gap: 0.35rem;
    font-size: 0.85rem;
  }

  /* Tags stays reachable from the footer when the header runs out of room. */
  .nav-tags {
    display: none;
  }

  .site-nav a {
    padding: 0.28rem 0.3rem;
    font-size: 0.75rem;
  }

  .theme-toggle {
    width: 1.7rem;
    height: 1.7rem;
    margin-left: 0.1rem;
  }
}

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

  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* --- print --------------------------------------------------------------- */

@media print {
  .site-header,
  .site-footer,
  .post-nav,
  .copy-button,
  .skip-link {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .wrap,
  .wrap--wide {
    width: 100%;
  }

  a {
    color: #000;
  }

  .post-body[data-legacy="true"] {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
}