/* meshterm.net — drawn in the Campbell palette the splash art was drawn in, on black. */

:root {
  color-scheme: dark;
  --black: #000000;
  --panel: #0c0c0c;
  --line: #1c1c28;
  --ink: #cccccc;
  --bright: #f2f2f2;
  --muted: #94a3b8;
  --grey: #767676;
  --red: #c50f1f;
  --red-hi: #e74856;
  --blue: #0037da;
  --blue-hi: #3b78ff;
  --cyan: #3a96dd;
  --cyan-hi: #61d6d6;
  --magenta: #881798;
  --magenta-hi: #b4009e;
  --yellow-hi: #f9f1a5;
  --mono: ui-monospace, "Cascadia Mono", "Cascadia Code", "JetBrains Mono", "SF Mono",
    Menlo, Consolas, "Liberation Mono", monospace;
  --wide: 960px;
  --measure: 72ch;
}

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

html {
  background: var(--black);
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--black);
  color: var(--ink);
  font: 16px/1.65 var(--mono);
  -webkit-text-size-adjust: 100%;
}

/* A haze of the sky's blue from above and the wordmark's magenta from below. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60rem 28rem at 50% -10rem, rgba(0, 55, 218, 0.22), transparent 70%),
    radial-gradient(44rem 26rem at 90% 115%, rgba(136, 23, 152, 0.2), transparent 70%);
}

main {
  flex: 1;
}

img {
  max-width: 100%;
}

a {
  color: var(--cyan-hi);
  text-decoration-color: rgba(97, 214, 214, 0.45);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--bright);
  text-decoration-color: var(--magenta-hi);
}

:focus-visible {
  outline: 2px solid var(--yellow-hi);
  outline-offset: 3px;
}

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

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.5rem 1rem;
  background: var(--black);
}

/* -- top bar ------------------------------------------------------------------------ */

.site-head {
  position: relative;
}

.site-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--magenta-hi) 20%, var(--cyan-hi) 80%, transparent);
  opacity: 0.55;
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--bright);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand img {
  display: block;
  width: 32px;
  height: 32px;
}

.bar ul,
.site-foot ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bar nav a {
  color: var(--ink);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.bar nav a:hover,
.bar nav a[aria-current="page"] {
  color: var(--cyan-hi);
  text-shadow: 0 0 0.6rem rgba(97, 214, 214, 0.55);
}

.bar nav a[aria-current="page"]::before {
  content: "❯ ";
  color: var(--magenta-hi);
}

/* -- hero --------------------------------------------------------------------------- */

.hero {
  padding: 2.75rem 1.25rem 0.5rem;
  text-align: center;
}

/* A HUD frame: four corner brackets, cyan above and magenta below, the page's black
   between. The splash wears it, and so does every screenshot. */
.hud.splash {
  --k: 18px;
  --pad: 14px;
  position: relative;
  display: inline-block;
  max-width: 100%;
}

.hud {
  --k: 12px;
  --t: 2px;
  --pad: 8px;
  display: block;
  padding: var(--pad);
  line-height: 0;
  background:
    linear-gradient(var(--cyan-hi) 0 0) top left / var(--k) var(--t) no-repeat,
    linear-gradient(var(--cyan-hi) 0 0) top left / var(--t) var(--k) no-repeat,
    linear-gradient(var(--cyan-hi) 0 0) top right / var(--k) var(--t) no-repeat,
    linear-gradient(var(--cyan-hi) 0 0) top right / var(--t) var(--k) no-repeat,
    linear-gradient(var(--magenta-hi) 0 0) bottom left / var(--k) var(--t) no-repeat,
    linear-gradient(var(--magenta-hi) 0 0) bottom left / var(--t) var(--k) no-repeat,
    linear-gradient(var(--magenta-hi) 0 0) bottom right / var(--k) var(--t) no-repeat,
    linear-gradient(var(--magenta-hi) 0 0) bottom right / var(--t) var(--k) no-repeat;
}

.splash img {
  display: block;
  width: 100%;
  height: auto;
}

/* Scanlines over the art, as a CRT would draw it. */
.splash::after {
  content: "";
  position: absolute;
  inset: var(--pad);
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0.2) 0 1px, transparent 1px 2px);
}

/* Whole multiples only, so every art pixel stays a square block. */
@media (min-width: 700px) {
  .splash img {
    width: 640px;
    image-rendering: pixelated;
  }
}

@media (min-width: 1360px) and (min-height: 900px) {
  .splash img {
    width: 1280px;
  }
}

/* The one-liner and its facts share one left edge, measured at the body's size. */
.intro {
  max-width: 64ch;
  margin: 1.75rem auto 0;
  text-align: left;
}

.tagline {
  margin: 0 0 0.4rem;
  color: var(--bright);
  font-size: 1.05rem;
}

.prompt {
  margin-right: 1ch;
  color: var(--magenta-hi);
  font-weight: 700;
  text-shadow: 0 0 0.5rem var(--magenta-hi);
}

.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  margin-left: 0.4ch;
  vertical-align: -0.18em;
  background: var(--cyan-hi);
  box-shadow: 0 0 0.6rem var(--cyan-hi);
  animation: blink 1.06s steps(1, end) infinite;
}

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

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

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.meta span + span::before {
  content: "·";
  margin: 0 0.7em;
  color: var(--grey);
}

/* -- sections ----------------------------------------------------------------------- */

.block {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.75rem 1.25rem;
}

/* A section heading the app's way: ── Label ──, the rule running on to the edge. */
.rule,
.page h2 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--cyan-hi);
  font-weight: 700;
}

.rule::before,
.page h2::before {
  content: "──";
  flex: none;
  color: var(--magenta-hi);
  letter-spacing: 0;
}

.rule::after,
.page h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--magenta-hi), transparent);
  opacity: 0.6;
}

.rule {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.lede {
  margin: 0 0 1.25rem;
}

/* -- neon buttons ------------------------------------------------------------------- */

.buttons,
.cards {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.buttons {
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.buttons.compact {
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}

.tone-cyan { --c: var(--cyan-hi); --t: var(--cyan-hi); }
.tone-magenta { --c: var(--magenta-hi); --t: #e27ad9; }
.tone-blue { --c: var(--blue-hi); --t: #7aa6ff; }
.tone-red { --c: var(--red-hi); --t: var(--red-hi); }
.tone-yellow { --c: var(--yellow-hi); --t: var(--yellow-hi); }

/* The glow lives on the wrapper: the button's clip-path would cut its own shadow off. */
.btn-wrap {
  transition: filter 0.15s ease;
}

.btn-wrap:hover,
.btn-wrap:focus-within {
  filter: drop-shadow(0 0 0.55rem var(--c));
}

/* A cut-corner chip: the tone fills the whole shape and a black inset, cut the same,
   leaves a one-pixel neon edge. */
.btn {
  --cut: 14px;
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: start;
  gap: 0.2rem;
  height: 100%;
  padding: 1rem 1.25rem 1.1rem;
  background: var(--c);
  color: var(--t);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.btn::before {
  content: "";
  position: absolute;
  inset: 1px;
  z-index: -1;
  background: linear-gradient(135deg, #08080e, var(--black) 65%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.btn:hover {
  color: var(--t);
}

.btn:focus-visible {
  outline: none;
}

.btn:focus-visible::before {
  inset: 3px;
}

.btn-label {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.btn-label::after {
  content: " ↗";
  font-weight: 400;
  opacity: 0.65;
}

.btn-note {
  color: var(--ink);
  font-size: 0.9rem;
}

/* A link that hasn't opened yet: the same chip without the press — no arrow, no glow,
   and the day it opens. */
.is-soon .btn {
  cursor: default;
}

.is-soon .btn-label::after {
  content: none;
}

.btn-wrap.is-soon:hover {
  filter: none;
}

.btn-soon {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0 0.45rem;
  border: 1px solid var(--yellow-hi);
  color: var(--yellow-hi);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  vertical-align: 0.2em;
}

.btn-url {
  color: var(--muted);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

/* -- page cards --------------------------------------------------------------------- */

.cards {
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

.card {
  display: grid;
  align-content: start;
  gap: 0.45rem;
  height: 100%;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--magenta-hi);
  background: linear-gradient(180deg, rgba(12, 12, 16, 0.92), rgba(0, 0, 0, 0.92));
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card:hover,
.card:focus-visible {
  border-color: var(--cyan-hi);
  box-shadow: 0 0 1.25rem -0.35rem var(--cyan-hi);
  color: var(--ink);
  outline: none;
}

.card-title {
  color: var(--bright);
  font-weight: 700;
}

.card-text {
  font-size: 0.9rem;
}

.card-go {
  margin-top: 0.25rem;
  color: var(--cyan-hi);
  font-size: 0.85rem;
}

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

/* The gallery breaks out wider than the page on both sides; its heading stays on the
   page's own edge, in line with every other section's. */
.block.wide {
  max-width: 1200px;
}

.block.wide > .rule {
  max-width: calc(var(--wide) - 2.5rem);
  margin-inline: auto;
}

.screens,
.captures {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .captures {
    grid-template-columns: 1fr 1fr;
  }
}

/* The captures two by two, and the device photo standing beside them. */
@media (min-width: 1000px) {
  .screens {
    grid-template-columns: 2fr 1fr;
    align-items: start;
  }
}

.screen {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  margin: 0;
}

.screen.device {
  justify-self: center;
  width: 100%;
  max-width: 24rem;
}

.screen img {
  display: block;
  width: 100%;
  height: auto;
}

.screen .hud {
  transition: filter 0.15s ease;
}

.screen .hud:hover,
.screen .hud:focus-visible {
  outline: none;
  filter: drop-shadow(0 0 0.5rem rgba(97, 214, 214, 0.5));
}

.screen figcaption {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.screen-title {
  display: block;
  color: var(--bright);
  font-weight: 700;
}

/* The full-size view: a dialog over the dimmed page, closed with Esc as in the app. */
.viewer {
  max-width: min(96vw, 1200px);
  max-height: 96vh;
  padding: 0;
  border: 1px solid var(--cyan-hi);
  background: var(--black);
  color: var(--ink);
  box-shadow: 0 0 2.5rem -0.5rem rgba(97, 214, 214, 0.6);
}

.viewer::backdrop {
  background: rgba(0, 0, 0, 0.85);
}

.viewer img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(96vh - 4rem);
  margin: 0 auto;
}

.viewer-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
}

.viewer-caption {
  margin: 0;
  color: var(--muted);
}

.viewer-close {
  flex: none;
  padding: 0.1rem 0.6rem;
  border: 1px solid var(--line);
  background: none;
  color: var(--cyan-hi);
  font: inherit;
  cursor: pointer;
}

.viewer-close:hover {
  border-color: var(--cyan-hi);
}

/* -- written pages ------------------------------------------------------------------ */

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.75rem 1.25rem 3rem;
}

.page h1 {
  margin: 0 0 0.6rem;
  color: var(--cyan-hi);
  font-size: clamp(1.6rem, 4.5vw, 2.25rem);
  line-height: 1.2;
  text-shadow: 0 0 0.9rem rgba(97, 214, 214, 0.45);
}

.page h1 em {
  margin-left: 0.3ch;
  color: var(--muted);
  font-size: 0.55em;
  font-style: normal;
  text-shadow: none;
}

.page h2 {
  margin: 2.5rem 0 1rem;
  font-size: 1.1rem;
}

.page h1 + h2 {
  margin-top: 1.75rem;
}

.page h3 {
  margin: 1.75rem 0 0.5rem;
  color: var(--bright);
  font-size: 1rem;
}

.page h3::before {
  content: "▸ ";
  color: var(--magenta-hi);
}

.page p,
.page ul,
.page ol,
.page blockquote,
.page pre {
  margin: 0 0 1rem;
}

.page strong {
  color: var(--bright);
}

.page a strong {
  color: inherit;
}

.page ul {
  padding-left: 1.6rem;
  list-style: "• ";
}

.page ul ul {
  margin: 0.25rem 0 0;
  list-style: "▸ ";
}

.page li::marker {
  color: var(--magenta-hi);
}

.page li + li {
  margin-top: 0.25rem;
}

.page .standfirst,
.page .colophon {
  color: var(--muted);
}

.page .colophon {
  font-size: 0.85rem;
}

.page hr {
  height: 1px;
  margin: 2.5rem 0 1rem;
  border: 0;
  background: linear-gradient(90deg, var(--grey), transparent);
}

.page code {
  padding: 0.05em 0.35em;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--yellow-hi);
}

.page blockquote,
.page pre {
  padding-left: 1rem;
  border-left: 2px solid var(--grey);
  color: var(--muted);
}

.page blockquote {
  margin-left: 0;
}

.page pre {
  overflow-x: auto;
}

.page pre code {
  padding: 0;
  border: 0;
  background: none;
}

/* A QR code is white on black and drawn where its fence was — for pointing a phone at
   the screen, so a phone doesn't get one. */
.qr {
  margin: 0.25rem 0 1.5rem;
  line-height: 0;
}

.qr svg {
  display: block;
}

@media (max-width: 40rem) {
  .qr {
    display: none;
  }
}

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

.site-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  width: 100%;
  max-width: var(--wide);
  margin: 2rem auto 0;
  padding: 1.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-foot p {
  margin: 0;
}

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

.site-foot a:hover {
  color: var(--cyan-hi);
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }
}