/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

/* The theme of ntropy's own website: the built-in theme with the palette
 * and faces of the terminal recording on the front page, dark first, plus
 * the front page's own layout, the header links, and the footer. Every
 * color and face is a custom property on :root; the light palette applies
 * to a system preference and to an explicit data-theme="light" on the root
 * element, and data-theme="dark" wins over the system preference.
 *
 * The fonts ship beside this file under fonts/ (all under the SIL Open
 * Font License, see fonts/LICENSE): DM Sans for everything read, DM Mono
 * for the wordmark, titles, dates, counts, and code.
 *
 * Icons are inline SVG `<use>` references into the sprite every page
 * carries, built from icons/; they take the text color, so a theme sizes,
 * colors, or hides them here. */

@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 100 1000;
  font-display: swap;
  src: url(fonts/dm-sans-latin-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "DM Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/dm-mono-latin-400-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "DM Mono";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/dm-mono-latin-400-italic.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "DM Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/dm-mono-latin-500-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Tokens. The palette is the one the demo recording uses: brand teal in
 * the cyan slot over a near-black ground, so the page and the video read
 * as one surface. Dark is the home mode; the light palette below keeps the
 * same teal, deepened for paper, for reading in daylight. The faces are
 * DM Mono for the wordmark, titles, and code and DM Sans for everything
 * read; there is no serif on these pages. */

:root {
  color-scheme: dark light;
  --bg: #0f0f12;
  --surface: #16161c;
  --raised: #1c1c22;
  --border: #2a2a32;
  --fg-bright: #f4f3ef;
  --fg: #e8e7e3;
  --muted: #9b9a94;
  --faint: #5f5e5a;
  --accent: #2dd4bf;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --on-accent: #0b1513;
  --link: #5eead4;
  --note-link: #5eead4;
  --callout-note: #2dd4bf;
  --callout-tip: #3fb950;
  --callout-important: #a78bfa;
  --callout-warning: #fdd877;
  --callout-caution: #ef6487;
  --shadow-panel: 0 12px 32px rgba(0, 0, 0, 0.55);
  --shadow-raised: 0 1px 2px rgba(0, 0, 0, 0.35);
  --display: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --serif: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --sans: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Layout: the reading column and the chrome around it. */
  --measure: 42rem;
  --page-width: 84rem;
  --gutter: 1.5rem;
  --sidebar-width: 15.5rem;
  --outline-width: 13rem;
  --column-gap: 3rem;
  --header-height: 3.5rem;

  /* Rhythm: the space between blocks of a note and between sections. */
  --block-gap: 1.1em;
  --section-gap: 2rem;

  /* Shape and motion. */
  --radius-control: 3px;
  --radius-block: 0;
  --radius-panel: 0;
  --radius-pill: 3px;
  --motion: 0.15s;
  --accent-bar: 3px;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f5;
    --surface: #eceeea;
    --raised: #ffffff;
    --border: #d5d9d5;
    --fg-bright: #101312;
    --fg: #1f2422;
    --muted: #5f6763;
    --faint: #9aa19d;
    --accent: #0f766e;
    --accent-soft: rgba(15, 118, 110, 0.11);
    --on-accent: #ffffff;
    --link: #0f766e;
    --note-link: #0f766e;
    --callout-note: #0f766e;
    --callout-tip: #2f7a3a;
    --callout-important: #6e40c9;
    --callout-warning: #b5541a;
    --callout-caution: #c0392b;
    --shadow-panel: 0 12px 32px rgba(16, 19, 18, 0.16);
    --shadow-raised: 0 1px 2px rgba(16, 19, 18, 0.14);
  }
}

:root[data-theme="light"] {
  --bg: #f6f7f5;
  --surface: #eceeea;
  --raised: #ffffff;
  --border: #d5d9d5;
  --fg-bright: #101312;
  --fg: #1f2422;
  --muted: #5f6763;
  --faint: #9aa19d;
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.11);
  --on-accent: #ffffff;
  --link: #0f766e;
  --note-link: #0f766e;
  --callout-note: #0f766e;
  --callout-tip: #2f7a3a;
  --callout-important: #6e40c9;
  --callout-warning: #b5541a;
  --callout-caution: #c0392b;
  --shadow-panel: 0 12px 32px rgba(16, 19, 18, 0.16);
  --shadow-raised: 0 1px 2px rgba(16, 19, 18, 0.14);
}

/* Base. */

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 106.25%;
  line-height: 1.65;
  scroll-behavior: smooth;
  /* An anchor jump lands the heading below the sticky header. */
  scroll-padding-top: calc(var(--header-height) + 1rem);
  -webkit-text-size-adjust: 100%;
}

/* Light text on a dark ground reads crisper with grayscale antialiasing;
 * dark text on light does not, so the light palette switches it off. */
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-color-scheme: light) {
  html:not([data-theme="dark"]) {
    -webkit-font-smoothing: auto;
    -moz-osx-font-smoothing: auto;
  }
}

html[data-theme="light"] {
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
}

body {
  margin: 0;
  padding: 1.5rem 1rem;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
}

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

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

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a.note-link {
  color: var(--note-link);
  font-style: italic;
}

.icon {
  width: 1.1em;
  height: 1.1em;
  flex: none;
  vertical-align: -0.2em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* The note header: the title in the serif over a teal rule, the date
 * stamped in the mono, the tags, then the remaining frontmatter. */

.note-header {
  border-bottom: 2px solid var(--accent);
  margin-bottom: 2rem;
  padding-bottom: 1.1rem;
}

.note-title {
  font-family: var(--display);
  font-size: 2.4rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.15;
  margin: 0 0 0.7rem;
  text-wrap: balance;
}

.note-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1.25rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  margin: 0;
}

.note-created {
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
}

.tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
}

.tag {
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}

.tag .icon {
  width: 0.85em;
  height: 0.85em;
  margin-right: 0.3em;
  opacity: 0.8;
  vertical-align: -0.1em;
}

a.tag:hover {
  color: var(--link);
  text-decoration: underline;
}

.frontmatter {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1.25rem;
  row-gap: 0.15rem;
  margin: 1rem 0 0;
  font-family: var(--sans);
  font-size: 0.875rem;
}

.frontmatter dt {
  color: var(--muted);
  font-weight: 500;
}

.frontmatter dd,
.frontmatter dl,
.frontmatter ul {
  margin: 0;
  padding: 0;
}

.frontmatter ul {
  list-style: none;
}

.frontmatter dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 0.75rem;
}

/* Body content. */

h1, h2, h3, h4, h5, h6 {
  color: var(--fg-bright);
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.25;
  margin: 1.8em 0 0.6em;
  text-wrap: balance;
}

h1 { font-size: 1.9rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }
h5, h6 { font-size: 1rem; }

p, ul, ol, dl, table, pre, blockquote {
  margin: 0 0 var(--block-gap);
}

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

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--surface);
  border-radius: 3px;
  padding: 0.1em 0.35em;
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: var(--accent-bar) solid var(--accent);
  border-radius: var(--radius-block);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  padding: 0.9rem 1.1rem;
}

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

blockquote {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: var(--accent-bar) solid var(--muted);
  border-radius: var(--radius-block);
  color: var(--muted);
  padding: 0.7rem 1.1rem;
}

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

/* Tables: rules between rows only, inside a rounded card. Separate
 * borders keep the corners round, which collapsed borders drop. */

table {
  border: 1px solid var(--border);
  border-collapse: separate;
  border-radius: var(--radius-block);
  border-spacing: 0;
  font-family: var(--sans);
  font-size: 0.9375rem;
  overflow: hidden;
}

th, td {
  border-bottom: 1px solid var(--border);
  padding: 0.45rem 0.85rem;
  text-align: left;
}

tr:last-child > td {
  border-bottom: 0;
}

th {
  background: var(--surface);
  color: var(--fg-bright);
  font-weight: 600;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.2rem 0;
}

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

input[type="checkbox"] {
  accent-color: var(--accent);
  margin-right: 0.35em;
}

/* Callouts, one accent per kind, each with its icon before the title. */

.callout {
  --callout: var(--callout-note);
  background: color-mix(in srgb, var(--callout) 7%, transparent);
  border-left: var(--accent-bar) solid var(--callout);
  border-radius: 0 var(--radius-block) var(--radius-block) 0;
  margin: 0 0 var(--block-gap);
  padding: 0.7rem 1.1rem 0.1rem;
}

.callout-title {
  color: var(--callout);
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.callout-title .icon {
  width: 1.05em;
  height: 1.05em;
  margin-right: 0.45em;
  vertical-align: -0.2em;
}

.callout-tip { --callout: var(--callout-tip); }
.callout-important { --callout: var(--callout-important); }
.callout-warning { --callout: var(--callout-warning); }
.callout-caution { --callout: var(--callout-caution); }

/* Footnotes. */

.footnotes {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
}

.footnote-backref {
  text-decoration: none;
}

/* Highlighted code: Shiki emits both themes' token colors as custom
 * properties (--shiki-light, --shiki-dark); the scheme in effect picks one.
 * The block keeps this theme's surface as its background rather than the
 * Shiki theme's, so code sits on the same paper as everything else. */

.shiki,
.shiki span {
  color: var(--shiki-light);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .shiki,
  :root:not([data-theme="light"]) .shiki span {
    color: var(--shiki-dark);
  }
}

:root[data-theme="dark"] .shiki,
:root[data-theme="dark"] .shiki span {
  color: var(--shiki-dark);
}

/* The site layout: header, navigation, content, and the outline beside it.
 * A standalone rendered note is the same page without the navigation
 * column. */

.site,
.document {
  padding: 0;
}

.document .layout {
  grid-template-columns: minmax(0, 1fr) var(--outline-width);
  grid-template-areas:
    "header header"
    "main side";
}

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--outline-width);
  grid-template-areas:
    "header header header"
    "sidebar main side";
  column-gap: var(--column-gap);
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 var(--gutter) 3rem;
}

/* The header stays in view, translucent over the page scrolling under it. */

.site-header {
  grid-area: header;
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  height: var(--header-height);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  font-family: var(--sans);
  margin-bottom: var(--section-gap);
}

.site-name {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  color: var(--fg-bright);
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  min-width: 0;
  overflow: hidden;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* The site name is the command you type: a prompt in the accent, then
 * the name. */
.site-name::before {
  content: "$";
  flex: none;
  color: var(--accent);
  font-weight: 400;
}

.site-name:hover {
  color: var(--link);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
}

.nav-open,
.nav-close {
  display: none;
  color: var(--muted);
  padding: 0.3rem;
}

.nav-open .icon,
.nav-close .icon {
  width: 1.4rem;
  height: 1.4rem;
  vertical-align: middle;
}

/* The scheme switch: three pressed-or-not icon buttons in one bar. */

.theme-switch {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-block);
  padding: 2px;
}

.theme-choice {
  background: none;
  border: 0;
  border-radius: var(--radius-control);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.5rem;
  transition: background var(--motion), color var(--motion);
}

.theme-choice .icon {
  width: 1rem;
  height: 1rem;
  vertical-align: middle;
}

.theme-choice:hover {
  color: var(--fg);
}

.theme-choice[aria-pressed="true"] {
  background: var(--raised);
  color: var(--accent);
  box-shadow: var(--shadow-raised);
}

/* The search button, and the palette it opens over the page. */

.search-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-block);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-family: var(--sans);
  font-size: 0.875rem;
  padding: 0.35rem 0.6rem 0.35rem 0.7rem;
  transition: color var(--motion), border-color var(--motion);
}

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

.search-toggle kbd,
.palette-keys kbd {
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1;
  padding: 0.15rem 0.35rem;
}

body.palette-open {
  overflow: hidden;
}

.palette-layer {
  position: fixed;
  inset: 0;
  z-index: 100;
  padding: 10vh 1rem 1rem;
  overflow-y: auto;
}

.palette-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 0;
  cursor: default;
  padding: 0;
}

.palette {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(var(--measure), 100%);
  max-height: 78vh;
  margin: 0 auto;
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
  font-family: var(--sans);
  overflow: hidden;
}

.palette-box {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  padding: 0.35rem 1rem;
}

.palette-box .icon {
  width: 1.15rem;
  height: 1.15rem;
}

.palette-input {
  flex: 1;
  min-width: 0;
  background: none;
  border: 0;
  color: var(--fg-bright);
  font: inherit;
  font-size: 1.05rem;
  padding: 0.6rem 0;
}

.palette-input:focus {
  outline: none;
}

.palette-input::-webkit-search-cancel-button {
  display: none;
}

.palette-results {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0.4rem 0.5rem;
  scrollbar-width: thin;
}

.palette-hint,
.palette-error {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
  padding: 0.8rem 0.6rem;
}

.palette-hint code {
  font-size: 0.85em;
}

.palette-error {
  color: var(--callout-caution);
}

.palette-group h3 {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  margin: 0.6rem 0.6rem 0.25rem;
}

.palette-group ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.palette-row a {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  border-left: var(--accent-bar) solid transparent;
  border-radius: var(--radius-control);
  color: var(--fg);
  padding: 0.5rem 0.7rem 0.5rem 0.55rem;
  text-decoration: none;
}

.palette-row .icon {
  flex: none;
  width: 1rem;
  height: 1rem;
  margin-top: 0.2rem;
  color: var(--faint);
}

.palette-row.is-selected a {
  background: var(--surface);
  border-left-color: var(--accent);
}

.palette-row.is-selected .icon {
  color: var(--accent);
}

.palette-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.palette-title {
  color: var(--fg-bright);
  font-weight: 500;
}

.palette-section {
  color: var(--muted);
  font-weight: 400;
  margin-left: 0.5rem;
}

.palette-section::before {
  content: "in ";
}

.palette-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.8rem;
  color: var(--muted);
  font-size: 0.8125rem;
}

.palette-meta time {
  font-family: var(--mono);
}

.palette-snippet {
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.9rem;
  line-height: 1.45;
}

.palette mark {
  background: var(--accent-soft);
  border-radius: 3px;
  color: var(--fg-bright);
  padding: 0 0.1em;
}

.palette-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  padding: 0.5rem 1rem;
}

.palette-keys {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* The navigation pane. Every clickable thing is a row of one geometry
   (padding, radius, hover fill), labels of notes and groups share the left
   edge of their level, the disclosure caret sits at the right end of a row,
   and each nested level steps in by a rail. */

.sidebar-pane {
  grid-area: sidebar;
  font-family: var(--sans);
  font-size: 0.875rem;
}

.sidebar summary {
  cursor: pointer;
  list-style: none;
}

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

.nav-title,
.nav-note > a,
.nav-group > details > summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: var(--radius-control);
  padding: 0.3rem 0.5rem;
  line-height: 1.35;
  color: var(--fg);
  text-decoration: none;
  transition: background-color var(--motion), color var(--motion);
}

.nav-title:hover,
.nav-note > a:hover,
.nav-group > details > summary:hover {
  background: var(--surface);
  color: var(--fg-bright);
}

.nav-title:focus-visible,
.nav-note > a:focus-visible,
.nav-group > details > summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.sidebar .chevron {
  flex: none;
  order: 1;
  width: 0.85em;
  height: 0.85em;
  margin-left: auto;
  color: var(--faint);
  transition: transform var(--motion);
}

.sidebar details[open] > summary > .chevron {
  transform: rotate(90deg);
}

/* A group row is a link with the caret beside it: the label navigates, the
   caret toggles. */
.nav-group > details > summary > a,
.nav-group > details > summary > span {
  flex: 1;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.nav-section + .nav-section {
  margin-top: 0.75rem;
}

.nav-title {
  color: var(--fg-bright);
  font-weight: 600;
  margin: 0;
}

.nav-title a {
  flex: 1;
  color: inherit;
  text-decoration: none;
}

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

.nav-entries .nav-entries {
  margin-left: 0.85rem;
  padding-left: 0.4rem;
  border-left: 1px solid var(--border);
}

.nav-note > a[aria-current="page"],
.nav-group > details > summary:has(> a[aria-current="page"]) {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.nav-group > details > summary > a[aria-current="page"] {
  color: var(--accent);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.85rem;
  list-style: none;
  margin: 0;
  padding: 0.2rem 0.5rem 0;
}

.tag-cloud a {
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
}

.tag-cloud a:hover {
  color: var(--link);
}

.tag-cloud a[aria-current="true"] {
  color: var(--accent);
  font-weight: 500;
}

.count {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.75rem;
  margin-left: 0.4em;
}

/* Content column, outline column. */

.layout > main {
  grid-area: main;
  max-width: var(--measure);
  min-width: 0;
  width: 100%;
}

.side {
  grid-area: side;
  font-family: var(--sans);
  font-size: 0.8125rem;
}

.sidebar-pane,
.side {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  align-self: start;
  max-height: calc(100vh - var(--header-height) - 2rem);
  overflow-y: auto;
  scrollbar-width: thin;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8125rem;
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.breadcrumbs a {
  color: inherit;
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--link);
}

.breadcrumbs .sep {
  width: 0.9em;
  height: 0.9em;
  margin-right: 0.25rem;
  color: var(--faint);
  vertical-align: -0.15em;
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  margin-top: 3rem;
  padding-top: 1.25rem;
}

.pager a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg-bright);
  max-width: 48%;
  text-decoration: none;
}

.pager .next {
  margin-left: auto;
  text-align: right;
}

.pager .icon {
  color: var(--faint);
}

.pager-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.pager-label {
  color: var(--muted);
  font-size: 0.75rem;
}

.pager-title {
  font-weight: 500;
}

.pager a:hover .pager-title {
  color: var(--link);
}

.outline ul {
  border-left: 1px solid var(--border);
  list-style: none;
  margin: 0;
  padding: 0;
}

.outline a {
  color: var(--muted);
  display: block;
  padding: 0.2rem 0.75rem;
  text-decoration: none;
}

.outline a:hover {
  color: var(--fg);
}

.outline a[aria-current="true"] {
  color: var(--accent);
  border-left: 2px solid var(--accent);
  margin-left: -1px;
}

.outline .depth-3 a { padding-left: 1.4rem; }
.outline .depth-4 a { padding-left: 2.05rem; }
.outline .depth-5 a,
.outline .depth-6 a { padding-left: 2.7rem; }

/* Note rows: date, title, tags on one line, each in its column. */

.note-rows {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}

.note-row {
  display: grid;
  grid-template-columns: 6.25rem minmax(0, 1fr);
  align-items: baseline;
  column-gap: 1rem;
  border-top: 1px solid var(--border);
  border-radius: var(--radius-control);
  font-family: var(--sans);
  margin: 0 -0.5rem;
  padding: 0.55rem 0.5rem;
  transition: background var(--motion);
}

.note-row:hover {
  background: var(--surface);
}

.note-row-main {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 1rem;
  row-gap: 0.1rem;
  min-width: 0;
}

.note-row:last-child {
  border-bottom: 1px solid var(--border);
}

.note-row time {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.8125rem;
  white-space: nowrap;
}

.note-row-title {
  color: var(--fg-bright);
  font-weight: 500;
  text-decoration: none;
}

.note-row-title:hover {
  color: var(--link);
  text-decoration: underline;
}

.note-row-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.1rem 0.8rem;
  font-size: 0.8125rem;
}

.empty {
  color: var(--muted);
  font-family: var(--sans);
}

/* Group chips: a section's or group's children with their counts. */

.group-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
}

.chip {
  display: inline-flex;
  align-items: baseline;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 0.875rem;
  padding: 0.2rem 0.8rem;
  text-decoration: none;
  transition: border-color var(--motion), color var(--motion);
}

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

/* The generated front page. */

.front {
  margin-bottom: 2.5rem;
}

.site-title {
  font-family: var(--display);
  font-size: 2.75rem;
  margin: 0 0 0.5rem;
}

/* The title of a tag or group page, the one heading a page has outside a
 * note body. */
.content > h1 {
  font-family: var(--display);
  font-size: 2.2rem;
  margin-top: 0;
}

.note-count {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.875rem;
  margin: 0;
}

.recent h2,
.section-summary h2,
.related h2 {
  font-family: var(--display);
  font-size: 1.35rem;
  margin: var(--section-gap) 0 0.75rem;
}

.section-summary h2 a {
  color: var(--fg);
  text-decoration: none;
}

.section-summary h2 a:hover {
  color: var(--link);
}

.related {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 0.5rem;
}

/* Narrow screens: one column, the navigation as a drawer the menu link
 * opens by targeting it. */

@media (max-width: 60rem) {
  .layout {
    --gutter: 1rem;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "header"
      "main"
      "side";
    column-gap: 0;
    padding: 0 var(--gutter) 2rem;
  }

  .layout > main {
    max-width: none;
  }

  .nav-open {
    display: inline-flex;
    margin-left: -0.3rem;
  }

  .sidebar-pane {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    width: min(20rem, 85vw);
    max-height: none;
    background: var(--bg);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow-panel);
    padding: 1rem 1.25rem 2rem;
    transform: translateX(-100%);
    transition: transform 0.2s ease-out;
    visibility: hidden;
  }

  .sidebar-pane:target {
    transform: none;
    visibility: visible;
  }

  .nav-close {
    display: inline-flex;
    float: right;
    margin: -0.2rem -0.5rem 0.5rem 0;
  }

  .side {
    position: static;
    max-height: none;
    margin-top: 2rem;
  }

  .note-title {
    font-size: 1.9rem;
  }

  .site-title {
    font-size: 2.2rem;
  }

  .search-toggle > span,
  .search-toggle kbd {
    display: none;
  }

  .palette-layer {
    padding: 4vh 0.75rem 0.75rem;
  }

  .palette-keys {
    display: none;
  }
}

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

  .sidebar-pane,
  .theme-choice,
  .search-toggle,
  .chip,
  .note-row,
  .sidebar .chevron {
    transition: none;
  }
}

/* The header: its row is capped with the page, its divider and ground
 * run the whole viewport, drawn by a pseudo-element bled out to the
 * edges behind the row. */

.site-header {
  position: sticky;
  border-bottom: 0;
  background: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.site-header::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

/* The header links, right after the site name. */

.site-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin-left: 0.4rem;
  font-family: var(--sans);
  font-size: 0.9rem;
}

.site-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}

.site-links a:hover {
  color: var(--fg-bright);
}

.site-links .icon {
  width: 1em;
  height: 1em;
}

/* A phone gives the header row no room for labels beside the marks. */
@media (max-width: 40rem) {
  .site-links {
    gap: 0.7rem;
    margin-left: 0;
  }

  .site-links .site-github span {
    display: none;
  }

  .site-header {
    gap: 0.7rem;
  }
}

@media (max-width: 24rem) {
  .site-links {
    display: none;
  }
}

/* The footer: the old page's two lines, a tagline and the credit with
 * the links, centered. */

.site-footer {
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.site-footer-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 1.8rem var(--gutter) 1.6rem;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 0.4rem;
}

.site-footer .heart {
  color: var(--accent);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--motion);
}

.site-footer a:hover {
  color: var(--accent);
}

.site-footer .sep {
  margin: 0 0.5rem;
  color: var(--faint);
}

/* The front page: a single column with the hero band, the highlight
 * strips, install beside the first commands, and the why. */

.front .layout {
  display: block;
  max-width: none;
  padding: 0;
}

.front .site-header,
.plain .site-header {
  box-sizing: border-box;
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.front main {
  display: block;
  max-width: none;
  padding: 0;
}

.front-section {
  position: relative;
  max-width: 56rem;
  margin: 0 auto;
  padding: 3.5rem var(--gutter);
}

/* Each section's ground and the divider above it run the whole viewport
 * while the section stays capped, drawn by a pseudo-element bled out to
 * the edges behind it; every other section sits on the surface tone. */
.front-section::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

.front-section + .front-section::before {
  border-top: 1px solid var(--border);
}

.front-install::before {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.front-hero .front-section::before {
  display: none;
}

.front-hero {
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
  border-bottom: 1px solid var(--border);
}

.front-hero .front-section {
  text-align: center;
  padding-top: 4rem;
  padding-bottom: 3rem;
}

.wordmark {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(3.2rem, 9vw, 6rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: var(--fg-bright);
  margin: 0;
}

.wordmark::after {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 0.82em;
  margin-left: 0.12em;
  vertical-align: -0.06em;
  background: var(--accent);
  animation: cursor-blink 1.1s steps(1) infinite;
}

@keyframes cursor-blink {
  50% { opacity: 0; }
}

.front-tagline {
  font-family: var(--sans);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.5;
  color: var(--muted);
  max-width: 40rem;
  margin: 1.2rem auto 0;
  text-wrap: balance;
}

.front-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.front-actions a {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-control);
  text-decoration: none;
  transition: border-color var(--motion), filter var(--motion);
}

.front-actions .primary {
  background: var(--accent);
  color: var(--on-accent);
}

.front-actions .primary:hover {
  filter: brightness(1.08);
}

.front-actions .secondary {
  border: 1px solid var(--border);
  color: var(--fg);
}

.front-actions .secondary:hover {
  border-color: var(--muted);
}

.front-actions .icon {
  width: 1.1em;
  height: 1.1em;
}

/* The recording in a window frame, sized as the old page sized it: the
 * whole column, the video scaling with it. The frame keeps the recording's
 * own colors in both palettes. */

.front-demo {
  padding-top: 0;
}

.front-section + .front-demo::before {
  border-top: 0;
}

.front-window {
  margin: 0 auto;
  text-align: left;
  background: #0f0f12;
  border: 1px solid #2a2a32;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

.front-window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.42rem 0.8rem;
  background: linear-gradient(to bottom, #2a2a35 0%, #1a1a20 100%);
  border-bottom: 1px solid #2a2a32;
}

.front-window-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.front-window-bar i:nth-child(1) { background: #ff5f57; }
.front-window-bar i:nth-child(2) { background: #febc2e; }
.front-window-bar i:nth-child(3) { background: #28c840; }

.front-window-bar span {
  flex: 1;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.8rem;
  line-height: 1.4;
  color: #9a9a9f;
  margin-right: 50px;
}

.front-window video {
  display: block;
  width: 100%;
  height: auto;
}

/* The highlights: three claims, centered, nothing boxed. */

.front-claims {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.5rem;
  text-align: center;
}

.front-claims h2 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.3;
  margin: 0 0 0.6rem;
  color: var(--fg-bright);
  text-wrap: balance;
}

.front-claims p {
  font-family: var(--sans);
  color: var(--muted);
  margin: 0;
  line-height: 1.55;
  text-wrap: pretty;
}

.front-claims code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface);
  border-radius: 3px;
  padding: 0.05em 0.35em;
  color: var(--fg);
}

@media (max-width: 720px) {
  .front-claims {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }
}

/* Install: choose a way, and its one command stands alone at hero size
 * with a copy button; the first commands follow. */

.front-install {
  text-align: center;
}

.front-install > h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  margin: 0 0 1.4rem;
  color: var(--fg-bright);
}

.front-downloads {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.1rem;
}

.front-downloads-label {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
  margin-right: 0.2rem;
}

.front-downloads .download {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.7rem 0.2rem 0.55rem;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--motion), color var(--motion), background var(--motion);
}

.front-downloads .download:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--fg-bright);
}

.front-downloads .icon {
  width: 1em;
  height: 1em;
}

.front-command {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  max-width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-block);
  padding: 0.9rem 1.2rem;
  font-family: var(--mono);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  color: var(--fg-bright);
  text-align: left;
}

.front-command pre {
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  font: inherit;
  color: inherit;
  white-space: pre;
  overflow-x: auto;
}

.front-command pre::before {
  content: "$ ";
  color: var(--accent);
}

.front-command .copy {
  flex: none;
  font: inherit;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  transition: color var(--motion), border-color var(--motion);
}

.front-command .copy:hover {
  color: var(--fg-bright);
  border-color: var(--muted);
}

.front-way-text {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.7rem 0 0;
}

.front-way-text a {
  color: var(--link);
}

.front-commands {
  margin-top: 2.6rem;
  text-align: left;
}

.front-commands h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0 0 0.6rem;
  color: var(--fg-bright);
}

.front-commands p {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.7rem 0 0;
}

.front-commands p a {
  color: var(--link);
}

.snippet {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: var(--accent-bar) solid var(--accent);
  border-radius: var(--radius-block);
  padding: 0.9rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--fg);
  overflow-x: auto;
  white-space: pre;
}

/* The plain pages, license and impressum: one reading column and
 * nothing beside it. */

.plain .layout {
  display: block;
  max-width: none;
  padding: 0;
}

.plain main {
  display: block;
  box-sizing: border-box;
  width: auto;
  max-width: calc(var(--measure) + 2 * var(--gutter));
  margin: 0 auto;
  padding: 1rem var(--gutter) 3rem;
}

.front main {
  box-sizing: border-box;
  width: auto;
}

.front-section {
  box-sizing: border-box;
}

/* The why: the note's body in a narrow measure, its header hidden since
 * the wordmark is the title. */

.front-why {
  max-width: 40rem;
  margin: 0 auto;
  text-align: center;
}

.front-why p {
  font-family: var(--sans);
  color: var(--muted);
  line-height: 1.6;
}

.front-why code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--fg);
}

.front-why h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  color: var(--fg-bright);
}

@media (prefers-reduced-motion: reduce) {
  .wordmark::after {
    animation: none;
  }
}