/* postline.nsisong.com. Nsisong Labs colours and type, from
   examples/nsisonglabs/design/tokens.json. */

:root {
  --blue: #1034a6;
  --blue-deep: #0b2680;
  --blue-soft: #e6ecfa;
  --ink: #191a23;
  --muted: #5b6070;
  --page: #ffffff;
  --panel: #f4f7fd;
  --line: #dbe3f6;
  --link: var(--blue);
  --night: #191a23;
  --night-panel: #23252f;
  --night-line: #343747;
  --night-text: #eef0f6;
  --night-muted: #a9aebf;
  --lime: #f0fcbf;
  --font: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 14px;
  --wrap: 74rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef0f6;
    --muted: #a9aebf;
    --page: #121319;
    --panel: #1b1d26;
    --line: #2c2f3d;
    --blue-soft: #1a2448;
    --link: #9db2ff;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 3px;
  border-radius: 4px;
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.875em;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--blue);
  color: #fff;
  border-radius: 8px;
}

.skip:focus {
  top: 1rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--link);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.eyebrow a {
  text-decoration: none;
}

.lede {
  max-width: 40rem;
  color: var(--muted);
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
}

.section-title {
  max-width: 34rem;
  margin: 0 0 2.5rem;
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  font-weight: 600;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: 0 1.4rem;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.button:hover {
  background: var(--blue-deep);
}

.button:active {
  transform: translateY(1px);
}

.text-link {
  font-weight: 600;
  text-decoration: none;
}

.text-link::after {
  content: " →";
  transition: margin 0.15s ease;
}

.text-link:hover::after {
  margin-left: 0.2em;
}

/* Header and footer */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.mark {
  width: 1.75rem;
  height: 1.75rem;
}

.mark rect {
  fill: var(--blue);
}

.mark path,
.mark circle {
  fill: none;
  stroke: #fff;
  stroke-width: 2.4;
  stroke-linecap: round;
}

.mark circle {
  fill: #fff;
  stroke: none;
}

.site-nav {
  display: flex;
  gap: clamp(0.9rem, 3vw, 2rem);
}

.site-nav a {
  color: var(--ink);
  font-weight: 500;
  text-decoration: none;
}

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

.site-footer {
  margin-top: clamp(4rem, 10vw, 8rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.925rem;
}

.foot {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem 2rem;
  padding-block: 2.5rem;
}

.foot p {
  margin: 0;
}

.foot ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.foot a {
  color: inherit;
}

.foot .legal {
  grid-column: 1 / -1;
  font-size: 0.85rem;
}

/* Home: hero */

.hero {
  position: relative;
  padding-block: clamp(4rem, 11vw, 8.5rem) clamp(3.5rem, 8vw, 6rem);
}

/* A faint planner grid: the page is a content calendar. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: min(60%, 46rem);
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 7.5rem 3rem;
  mask-image: radial-gradient(ellipse at 75% 35%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 75% 35%, #000 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  max-width: 17ch;
  margin: 0 0 1.5rem;
  font-size: clamp(2.5rem, 6.2vw, 4.75rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.install {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding-left: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
}

.install code {
  font-size: 0.95rem;
  white-space: nowrap;
}

.prompt {
  color: var(--muted);
  user-select: none;
}

.copy {
  min-height: 2.4rem;
  margin: 0.3rem;
  margin-left: 0.75rem;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--page);
  color: var(--ink);
  font: 500 0.875rem var(--font);
  cursor: pointer;
}

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

.copy-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.reveal {
  animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.reveal:nth-child(2) { animation-delay: 0.06s; }
.reveal:nth-child(3) { animation-delay: 0.12s; }
.reveal:nth-child(4) { animation-delay: 0.18s; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
}

/* Home: the file and its card */

.exhibit {
  padding-block: clamp(4rem, 9vw, 7rem);
  background: var(--night);
  color: var(--night-text);
}

.exhibit .section-title {
  max-width: 38rem;
}

.exhibit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.file,
.card-shot,
.terminal,
.shot {
  margin: 0;
}

.file {
  overflow: hidden;
  border: 1px solid var(--night-line);
  border-radius: var(--radius);
  background: var(--night-panel);
}

.file figcaption,
.terminal figcaption {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--night-line);
  color: var(--night-muted);
  font: 400 0.8rem var(--mono);
}

.dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--lime);
}

.file pre,
.terminal pre {
  margin: 0;
  padding: 1.1rem 1.2rem 1.3rem;
  overflow-x: auto;
  font-size: 0.8rem;
  line-height: 1.6;
}

.t-fence,
.t-dim {
  color: #7d8296;
}

.t-key {
  color: #a9bcff;
}

.t-tag {
  color: var(--lime);
}

.t-prompt {
  color: #7d8296;
  user-select: none;
}

.t-ok {
  color: #b9e6c9;
}

.arrow {
  display: grid;
  place-items: center;
  gap: 0.5rem;
}

.arrow code {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--night-line);
  border-radius: 999px;
  color: var(--lime);
  font-size: 0.78rem;
  white-space: nowrap;
}

.arrow::after {
  content: "→";
  color: var(--night-muted);
  font-size: 1.5rem;
  line-height: 1;
}

.card-shot img {
  border-radius: var(--radius);
  box-shadow: 0 30px 60px -30px rgb(0 0 0 / 0.7), 0 0 0 1px var(--night-line);
}

.card-shot figcaption {
  margin-top: 1rem;
  color: var(--night-muted);
  font-size: 0.875rem;
}

.card-shot code {
  color: var(--night-text);
}

/* Home: ledger list */

.ledger {
  padding-top: clamp(4.5rem, 10vw, 8rem);
}

.ledger-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ledger;
  border-top: 1px solid var(--line);
}

.ledger-list li {
  display: grid;
  grid-template-columns: 4rem minmax(0, 18rem) minmax(0, 1fr);
  gap: 0.5rem 2rem;
  align-items: baseline;
  padding-block: 1.6rem;
  border-bottom: 1px solid var(--line);
  counter-increment: ledger;
}

.ledger-list li::before {
  content: counter(ledger, decimal-leading-zero);
  color: var(--link);
  font: 500 0.85rem var(--mono);
}

.ledger-list h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.ledger-list p {
  margin: 0;
  color: var(--muted);
}

/* Home: week */

.week {
  margin-top: clamp(4.5rem, 10vw, 8rem);
  padding-block: clamp(4rem, 8vw, 6rem);
  background: var(--panel);
  border-block: 1px solid var(--line);
}

.week-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.week-grid .section-title {
  margin-bottom: 1.25rem;
}

.week-grid p {
  color: var(--muted);
}

.terminal {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--night);
  color: var(--night-text);
  box-shadow: 0 24px 48px -28px rgb(16 52 166 / 0.45);
}

/* Home: design levels */

.levels {
  padding-top: clamp(4.5rem, 10vw, 8rem);
}

.levels-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  grid-template-areas:
    "list list"
    "wide square";
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  margin-bottom: 2rem;
}

.levels-list {
  grid-area: list;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem clamp(1.5rem, 3vw, 2.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: level;
}

.levels-list li {
  padding-top: 1rem;
  border-top: 2px solid var(--blue);
  color: var(--muted);
  counter-increment: level;
}

.levels-list li::before {
  content: "Level " counter(level);
  display: block;
  margin-bottom: 0.5rem;
  color: var(--link);
  font: 500 0.8rem var(--mono);
}

.levels-list strong {
  display: block;
  color: var(--ink);
  font-size: 1.1rem;
}

.shot img {
  border-radius: var(--radius);
  box-shadow: 0 0 0 1px var(--line);
}

.shot-wide {
  grid-area: wide;
}

.shot-square {
  grid-area: square;
}

.shot figcaption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Home: channels */

.channels {
  padding-top: clamp(4.5rem, 10vw, 8rem);
}

.channel-list {
  margin: 0 0 2rem;
  border-top: 1px solid var(--line);
}

.channel-list div {
  display: grid;
  grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
  gap: 0.25rem 2rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.channel-list dt {
  font-weight: 600;
}

.channel-list dd {
  margin: 0;
  color: var(--muted);
}

/* Home: closing band */

.closing {
  margin-top: clamp(4.5rem, 10vw, 8rem);
  padding-block: clamp(3rem, 7vw, 4.5rem);
  border-radius: calc(var(--radius) * 2);
  background: var(--blue);
  color: #fff;
  max-width: calc(var(--wrap) - 2 * var(--gutter));
  padding-inline: clamp(1.5rem, 5vw, 4rem);
}

.closing h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
}

.closing p {
  margin: 0 0 2rem;
  color: #dbe3f6;
}

.closing .button {
  background: #fff;
  color: var(--blue);
}

.closing .button:hover {
  background: var(--blue-soft);
}

.closing :focus-visible {
  outline-color: #fff;
}

/* 404 */

.lost {
  padding-block: clamp(5rem, 14vw, 10rem);
}

.lost h1 {
  max-width: 16ch;
  margin: 0 0 1rem;
  font-size: clamp(2.25rem, 5.5vw, 4rem);
}

.lost-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

/* Docs index */

.docs-index {
  padding-block: clamp(3.5rem, 8vw, 6rem) 0;
}

.docs-index h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
}

.guide-list {
  margin: 3rem 0 2rem;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.guide-list a {
  display: grid;
  grid-template-columns: 3rem minmax(0, 15rem) minmax(0, 1fr);
  gap: 0.25rem 1.5rem;
  align-items: baseline;
  padding: 1.25rem 0.5rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.guide-list a:hover {
  background: var(--panel);
}

.guide-list .num {
  color: var(--link);
  font: 500 0.85rem var(--mono);
}

.guide-list .name {
  font-size: 1.15rem;
  font-weight: 600;
}

.guide-list .desc {
  color: var(--muted);
  font-size: 0.95rem;
}

.more {
  color: var(--muted);
}

/* Docs pages */

.doc-shell {
  display: grid;
  grid-template-columns: 13.5rem minmax(0, 46rem) 12rem;
  justify-content: space-between;
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.doc-nav-menu {
  position: sticky;
  top: 5.5rem;
}

.doc-nav-menu summary {
  display: none;
}

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

.doc-nav a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.doc-nav a:hover {
  color: var(--ink);
  border-left-color: var(--muted);
}

.doc-nav a[aria-current="page"] {
  border-left-color: var(--blue);
  color: var(--ink);
  font-weight: 600;
}

.doc-head h1 {
  margin: 0 0 2rem;
  font-size: clamp(2.1rem, 4.5vw, 3rem);
  font-weight: 700;
}

.toc {
  position: sticky;
  top: 5.5rem;
  align-self: start;
  font-size: 0.875rem;
}

.toc p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

.toc li {
  margin-bottom: 0.5rem;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
}

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

.toc code {
  font-size: 0.85em;
}

.prose {
  font-size: 1.0625rem;
}

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

.prose h2 {
  margin: 3rem 0 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 1.6rem;
  font-weight: 600;
}

.prose h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.prose h2,
.prose h3 {
  position: relative;
}

.anchor {
  position: absolute;
  right: 100%;
  padding-right: 0.4rem;
  color: var(--muted);
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.prose h2:hover .anchor,
.prose h3:hover .anchor {
  opacity: 1;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.1rem;
}

.prose li {
  margin-bottom: 0.35rem;
}

.prose li::marker {
  color: var(--muted);
}

.prose :not(pre) > code {
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow-wrap: anywhere;
}

.prose pre {
  margin: 0 0 1.5rem;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--night);
  color: var(--night-text);
  font-size: 0.85rem;
  line-height: 1.6;
}

.prose blockquote {
  margin: 0 0 1.25rem;
  padding: 0.25rem 0 0.25rem 1.1rem;
  border-left: 3px solid var(--blue);
  color: var(--muted);
}

.prose img {
  border-radius: var(--radius);
}

.table-wrap {
  margin: 0 0 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
}

.prose th,
.prose td {
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--panel);
  font-weight: 600;
}

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

.doc-foot {
  margin-top: 3.5rem;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.pager a {
  display: grid;
  gap: 0.15rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s ease;
}

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

.pager span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 400;
}

.pager .next {
  text-align: right;
}

.source {
  margin-top: 1.5rem;
  font-size: 0.9rem;
}

/* Responsive */

@media (max-width: 1100px) {
  .doc-shell {
    grid-template-columns: 13rem minmax(0, 1fr);
  }

  .toc {
    display: none;
  }
}

@media (max-width: 900px) {
  .exhibit-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .arrow::after {
    content: "↓";
  }

  .card-shot {
    max-width: 34rem;
  }

  .week-grid,
  .levels-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .levels-grid {
    grid-template-areas:
      "list"
      "wide"
      "square";
  }

  .levels-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .shot-square {
    max-width: 24rem;
  }

  .ledger-list li {
    grid-template-columns: 3rem minmax(0, 1fr);
  }

  .ledger-list li p {
    grid-column: 2;
  }
}

@media (max-width: 820px) {
  .doc-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
    padding-top: 1.25rem;
  }

  .doc-nav-menu {
    position: static;
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .doc-nav-menu summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 3rem;
    padding: 0 1rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
  }

  .doc-nav-menu summary::-webkit-details-marker {
    display: none;
  }

  .doc-nav-menu summary::after {
    content: "+";
    color: var(--muted);
    font-size: 1.25rem;
  }

  .doc-nav-menu[open] summary::after {
    content: "−";
  }

  .doc-nav-menu ol {
    padding: 0 0.5rem 0.75rem;
  }

  .anchor {
    display: none;
  }
}

@media (max-width: 640px) {
  .channel-list div,
  .guide-list a {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-list .num {
    display: none;
  }

  .foot {
    grid-template-columns: minmax(0, 1fr);
  }

  .install {
    width: 100%;
    justify-content: space-between;
  }

  .install {
    padding-left: 0.9rem;
  }

  .install code {
    min-width: 0;
    overflow-x: auto;
    font-size: 0.76rem;
  }

  .copy {
    margin-left: 0.4rem;
    padding: 0 0.7rem;
  }

  .cta .button {
    width: 100%;
    justify-content: center;
  }

  .site-nav a[href="/docs/channels/"] {
    display: none;
  }

  .pager {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}