/* nodeenv landing page. No build step: this file is served as is. */

:root {
  color-scheme: light dark;
  --paper: #f6f7f9;
  --surface: #eceff3;
  --ink: #18202b;
  --muted: #555f6d;
  --rule: #d9dee5;
  --accent: #2b7a31;
  /* Lines typed inside an environment are tinted with the accent. */
  --band: color-mix(in srgb, var(--accent) 11%, transparent);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #111519;
    --surface: #1a2027;
    --ink: #e3e8ee;
    --muted: #9aa5b1;
    --rule: #2a323c;
    --accent: #7cc47f;
  }
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 1rem/1.6 var(--sans);
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

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

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

code:not(.line) {
  padding: 0.1em 0.3em;
  border-radius: 4px;
  background: var(--surface);
  /* Keep flags such as --requirements from breaking at a hyphen. */
  white-space: nowrap;
}

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

.wrap {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Top bar */

.topbar {
  border-bottom: 1px solid var(--rule);
}

.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  min-height: 3.5rem;
}

.wordmark {
  color: var(--ink);
  font: 700 1.125rem/1 var(--mono);
  text-decoration: none;
}

.wordmark span {
  color: var(--accent);
}

.topbar nav {
  display: flex;
  gap: 1.25rem;
}

.topbar nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

.topbar nav a:hover {
  color: var(--accent);
}

/* Sections */

main > section {
  padding: 2.75rem 0;
  border-top: 1px solid var(--rule);
}

main > section.hero {
  padding: clamp(3rem, 9vw, 6rem) 0 3rem;
  border-top: 0;
}

h1 {
  max-width: 14ch;
  margin: 0 0 1.25rem;
  font-size: clamp(2.25rem, 1.5rem + 3.5vw, 3.75rem);
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.375rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h2 code:not(.line) {
  padding: 0;
  background: none;
}

h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  line-height: 1.3;
}

p {
  max-width: 40rem;
  margin: 0 0 1rem;
}

.lead {
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 1.1875rem;
}

.note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
}

.badges img {
  display: block;
}

/* Terminal blocks */

.term {
  /* A grid lets every line stretch to the widest one, so the tint of
     lines inside an environment stays even when the block scrolls. */
  display: grid;
  overflow-x: auto;
  padding: 0.875rem 0;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--surface);
  font: 0.875rem/1.75 var(--mono);
}

.line {
  display: block;
  padding: 0 1rem;
  font-size: inherit;
  white-space: pre;
}

.line.in {
  background: var(--band);
  box-shadow: inset 3px 0 0 var(--accent);
}

/* Prompts are not selectable, so copying a block copies only commands. */
.ps {
  color: var(--muted);
  -webkit-user-select: none;
  user-select: none;
}

.env {
  color: var(--accent);
  font-weight: 600;
}

.install {
  max-width: 24rem;
  font-size: 1.0625rem;
}

.file {
  max-width: 24rem;
}

/* Feature cards */

.cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}

.card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 1.25rem 1.25rem 0;
  border: 1px solid var(--rule);
  border-radius: 10px;
}

.card p {
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

.card .term {
  margin: auto -1.25rem 0;
  border-width: 1px 0 0;
  border-radius: 0;
}

@media (min-width: 60rem) {
  .cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Node sources */

.sources {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem 2rem;
  margin: 0;
}

.sources dt {
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.sources dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

@media (min-width: 48rem) {
  .sources {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Links and footer */

.more {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer {
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.875rem;
}

.footer p {
  margin: 0;
  padding: 1.5rem 0 2.5rem;
}