/* roro9stack.net: the tokens and shapes of the design (docs/milestones/W1.md). Every colour is on the
   device's RGB332 grid. Dark is the default; a visitor who prefers light gets light, and the switch
   in the header overrides both. */

@font-face { font-family: "DM Mono"; src: url(/fonts/DMMono-Regular.woff2) format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "DM Mono"; src: url(/fonts/DMMono-Medium.woff2) format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Hanken Grotesk"; src: url(/fonts/HankenGrotesk.woff2) format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }

:root {
  --mono: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;

  color-scheme: dark;
  --s1: #494955; --s2: #000000; --s3: #6d6d55; --line: #6d6d55; --ls: #b6b6aa;
  --ink: #ffffff; --muted: #b6dbff;
  --cyan: #00dbff; --onfill: #000055; --cyandeep: #00dbff; --cyantext: #00dbff;
  --mag: #ff00ff; --magtext: #ff92ff; --orange: #ff9200; --orangetext: #ffb655;
  --icons: url(/img/icons-dark.svg);
  --logo-dark: block; --logo-light: none;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --s1: #ffffff; --s2: #dbffff; --s3: #b6dbff; --line: #92b6ff; --ls: #6d6daa;
    --ink: #000055; --muted: #4949aa;
    --cyandeep: #0092aa; --cyantext: #006daa; --magtext: #b600aa; --orangetext: #b64900;
    --icons: url(/img/icons-light.svg);
    --logo-dark: none; --logo-light: block;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --s1: #ffffff; --s2: #dbffff; --s3: #b6dbff; --line: #92b6ff; --ls: #6d6daa;
  --ink: #000055; --muted: #4949aa;
  --cyandeep: #0092aa; --cyantext: #006daa; --magtext: #b600aa; --orangetext: #b64900;
  --icons: url(/img/icons-light.svg);
  --logo-dark: none; --logo-light: block;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--s1); color: var(--ink); font: 400 16px/24px var(--sans); }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }
img { max-width: 100%; height: auto; }
h1, h2, h3, p, ul, ol, figure, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }

/* A focus ring must show. clip-path clips an outline along with everything else outside the shape,
   so a focused notched control drops its notches and shows square corners and its ring. */
:focus-visible { outline: 2px solid var(--cyandeep); outline-offset: 2px; }
.n-sm:focus-visible, .n-md:focus-visible, .n-lg:focus-visible { clip-path: none; }

.skip { position: absolute; left: 8px; top: -60px; z-index: 10; background: var(--cyan); color: var(--onfill); padding: 12px 16px; font: 500 14px/20px var(--mono); }
.skip:focus { top: 8px; }

/* Notched corners: whole steps on a 4px grid (the device draws no curves). */
.n-sm { clip-path: polygon(0 4px,4px 4px,4px 0,calc(100% - 4px) 0,calc(100% - 4px) 4px,100% 4px,100% calc(100% - 4px),calc(100% - 4px) calc(100% - 4px),calc(100% - 4px) 100%,4px 100%,4px calc(100% - 4px),0 calc(100% - 4px)); }
.n-md { clip-path: polygon(0 8px,4px 8px,4px 4px,8px 4px,8px 0,calc(100% - 8px) 0,calc(100% - 8px) 4px,calc(100% - 4px) 4px,calc(100% - 4px) 8px,100% 8px,100% calc(100% - 8px),calc(100% - 4px) calc(100% - 8px),calc(100% - 4px) calc(100% - 4px),calc(100% - 8px) calc(100% - 4px),calc(100% - 8px) 100%,8px 100%,8px calc(100% - 4px),4px calc(100% - 4px),4px calc(100% - 8px),0 calc(100% - 8px)); }
.n-lg { clip-path: polygon(0 16px,8px 16px,8px 8px,16px 8px,16px 0,calc(100% - 16px) 0,calc(100% - 16px) 8px,calc(100% - 8px) 8px,calc(100% - 8px) 16px,100% 16px,100% calc(100% - 16px),calc(100% - 8px) calc(100% - 16px),calc(100% - 8px) calc(100% - 8px),calc(100% - 16px) calc(100% - 8px),calc(100% - 16px) 100%,16px 100%,16px calc(100% - 8px),8px calc(100% - 8px),8px calc(100% - 16px),0 calc(100% - 16px)); }

.wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding-left: 32px; padding-right: 32px; }
.mono { font-family: var(--mono); }

/* Header */
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 24px; padding-bottom: 24px; }
.brand { display: flex; align-items: center; min-height: 44px; }
.logo { height: 28px; width: auto; }
.logo-dark { display: var(--logo-dark); }
.logo-light { display: var(--logo-light); }
.bar nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.bar nav a, .link-btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; font: 400 14px/20px var(--mono); }
.link-btn { background: none; border: 0; color: inherit; cursor: pointer; }
.link-btn:hover { text-decoration: underline; text-underline-offset: 4px; }
.js-only { display: none; }
.js .js-only { display: inline-flex; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; font: 500 14px/20px var(--mono); border: 0; cursor: pointer; }
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn-primary { background: var(--cyan); color: var(--onfill); }
.btn-secondary { background: var(--s2); color: var(--ink); }
.bar nav a.btn { min-height: 44px; padding: 0 20px; }
.bar nav a.btn:hover { text-decoration: none; }

/* Type */
.eyebrow { font: 500 12px/16px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--cyantext); }
.eyebrow-row { display: flex; align-items: center; gap: 8px; }
.eyebrow .v { text-transform: none; }
.dot { width: 8px; height: 8px; background: var(--cyan); flex: none; }
h1, h2 { font-family: var(--mono); font-weight: 500; }
h1 { font-size: 64px; line-height: 64px; letter-spacing: -.02em; }
h2 { font-size: 40px; line-height: 44px; letter-spacing: -.01em; }
h3 { font-size: 24px; line-height: 30px; font-weight: 600; }
.accent { color: var(--cyantext); }
.lead { font-size: 18px; line-height: 28px; max-width: 520px; }
.muted { color: var(--muted); }
.small { font-size: 14px; line-height: 20px; }
.caption { font: 400 12px/16px var(--mono); color: var(--muted); }
code, .code { font-family: var(--mono); font-size: .9em; }

section { padding-top: 64px; padding-bottom: 64px; }
.section-head { display: flex; flex-direction: column; gap: 12px; max-width: 680px; }
.stack { display: flex; flex-direction: column; gap: 24px; }

/* Hero */
.hero { padding-top: 48px; padding-bottom: 32px; display: flex; flex-direction: column; gap: 48px; }
.hero-grid { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 32px 56px; }
.hero-grid > div { flex: 1 1 360px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.hero-grid > div:first-child { flex-basis: 480px; }
.actions { display: flex; flex-wrap: wrap; gap: 16px; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.facts li { display: flex; align-items: center; gap: 8px; font: 400 14px/20px var(--mono); color: var(--muted); }
.facts li::before { content: ""; width: 8px; height: 8px; background: var(--mag); display: block; }
.slab { background: var(--cyan); padding: 40px; display: flex; flex-wrap: wrap; gap: 32px; }
.slab .device { flex: 1 1 440px; min-width: 0; }
.illustration { display: block; width: 100%; height: auto; }
.illustration .mono { font-family: var(--mono); }
.hero .caption { margin-top: -36px; }

/* Panels */
.panel { background: var(--s2); padding: 32px; }
.status-box { background: var(--s2); padding: 24px 32px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 24px; }
.status-box .eyebrow { color: var(--orangetext); }
.status-box p { flex: 1 1 420px; min-width: 0; }
.status-box a, .prose a, .steps a, .need a { color: var(--cyantext); text-decoration: underline; text-underline-offset: 4px; }

.need { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; margin-top: 32px; }
.need li { display: flex; flex-direction: column; gap: 4px; padding-left: 16px; border-left: 4px solid var(--cyan); }
.need strong { font-weight: 600; }
.need span { color: var(--muted); }

/* App cards */
.cards { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 40px; }
.card { flex: 1 1 320px; min-width: 0; background: var(--s2); padding: 32px; display: flex; flex-direction: column; gap: 16px; }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.card .tag { font: 500 12px/16px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--cyantext); }
.card .num { font: 500 12px/16px var(--mono); letter-spacing: .08em; color: var(--muted); }
.card p { color: var(--muted); }
.card .fact { margin-top: auto; padding-top: 8px; display: flex; align-items: center; gap: 8px; font: 500 12px/16px var(--mono); letter-spacing: .04em; }
.card .fact::before { content: ""; width: 8px; height: 8px; background: var(--cyan); flex: none; }
.card.planned .tag { color: var(--orangetext); }
.card.planned .fact::before { background: var(--orange); }
.ic { width: 48px; height: 48px; flex: none; background-image: var(--icons); background-repeat: no-repeat; background-size: 144px 192px; image-rendering: pixelated; }
.i0 { background-position: 0 0; } .i1 { background-position: -48px 0; } .i2 { background-position: -96px 0; }
.i3 { background-position: 0 -48px; } .i4 { background-position: -48px -48px; } .i5 { background-position: -96px -48px; }
.i6 { background-position: 0 -96px; } .i7 { background-position: -48px -96px; } .i8 { background-position: -96px -96px; }
.i9 { background-position: 0 -144px; }
.cards-note { margin-top: 24px; font-size: 14px; line-height: 20px; color: var(--muted); }

/* Real screenshots */
.shots { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; margin-top: 40px; }
.shot { background: var(--s2); padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.shot img { display: block; width: 100%; height: auto; }  /* shown at about half size: smoothed, not pixel-doubled */
.shot figcaption { font: 500 12px/16px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

/* Updates */
.split { display: flex; flex-wrap: wrap; gap: 48px; }
.split > div { flex: 1 1 380px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.split > .aside { flex-basis: 420px; justify-content: center; gap: 32px; }
.updates { background: var(--s2); padding: 48px; }
.terminal { background: var(--s1); padding: 16px 20px; font: 400 14px/20px var(--mono); overflow-x: auto; white-space: pre; }
.terminal .p { color: var(--cyantext); }
.terminal .c { color: var(--muted); }
.num-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 24px; }
.num-row .big { flex: none; min-width: 160px; font: 500 64px/64px var(--mono); letter-spacing: -.02em; }
.num-row p { flex: 1 1 200px; min-width: 0; color: var(--muted); }
.big.c1 { color: var(--cyantext); } .big.c2 { color: var(--magtext); }
.split > .blocks { display: flex; flex-direction: column; gap: 4px; background: var(--s2); padding: 32px; font: 400 14px/20px var(--mono); overflow-x: auto; white-space: pre; }
.split > .blocks .gap { height: 16px; }
.split > .blocks .c { color: var(--muted); }
.split > .blocks .p { color: var(--cyantext); }

/* Call to action */
.cta { background: var(--cyan); color: var(--onfill); padding: 48px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 40px; }
.cta > div:not(.nine) { flex: 1 1 360px; min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.cta p { font-size: 18px; line-height: 28px; max-width: 480px; }
.cta .btn { background: #000055; color: #ffffff; }
.nine { display: grid; grid-template-columns: repeat(5, 24px); gap: 4px; }
.nine i { display: block; width: 24px; height: 24px; }
.nine i.on { background: var(--s1); }

/* Footer */
footer .wrap { padding-top: 32px; padding-bottom: 64px; display: flex; flex-direction: column; gap: 24px; }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.foot-row span, footer small { font: 400 14px/20px var(--mono); color: var(--muted); }
footer nav { display: flex; flex-wrap: wrap; gap: 8px; }
footer nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; font: 400 14px/20px var(--mono); }
footer small { display: block; max-width: 760px; }

/* Pages: Install, Downloads, 404 */
.page { padding-top: 32px; padding-bottom: 64px; display: flex; flex-direction: column; gap: 40px; }
.page h1 { font-size: 48px; line-height: 52px; }
.page h2 { font-size: 32px; line-height: 36px; }
.prose { max-width: 720px; display: flex; flex-direction: column; gap: 16px; }
.prose h2 { margin-top: 24px; }
.prose ul { list-style: disc; padding-left: 24px; display: flex; flex-direction: column; gap: 8px; }
.prose ol, .steps { list-style: decimal; padding-left: 24px; display: flex; flex-direction: column; gap: 12px; }
.prose pre { margin: 0; padding: 16px 20px; background: var(--s2); font: 400 14px/20px var(--mono); overflow-x: auto; clip-path: polygon(0 8px,4px 8px,4px 4px,8px 4px,8px 0,calc(100% - 8px) 0,calc(100% - 8px) 4px,calc(100% - 4px) 4px,calc(100% - 4px) 8px,100% 8px,100% calc(100% - 8px),calc(100% - 4px) calc(100% - 8px),calc(100% - 4px) calc(100% - 4px),calc(100% - 8px) calc(100% - 4px),calc(100% - 8px) 100%,8px 100%,8px calc(100% - 4px),4px calc(100% - 4px),4px calc(100% - 8px),0 calc(100% - 8px)); }
.prose pre code { font-size: 14px; }
.prose :not(pre) > code { background: var(--s2); padding: 0 6px; }
.prose table { border-collapse: collapse; width: 100%; }
.prose th, .prose td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }

.flasher { background: var(--s2); padding: 32px; display: flex; flex-direction: column; gap: 20px; max-width: 720px; }
.flasher dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 20px; font: 400 14px/20px var(--mono); }
.flasher dt { color: var(--muted); }
.flasher dd { overflow-wrap: anywhere; }
.flasher [hidden] { display: none !important; }
.flasher .msg { color: var(--orangetext); }
.hash { word-break: break-all; }

.releases { display: flex; flex-direction: column; gap: 24px; }
.release { background: var(--s2); padding: 24px 32px; display: flex; flex-direction: column; gap: 12px; max-width: 880px; }
.release h2 { font-size: 28px; line-height: 32px; }
.release .meta { font: 400 14px/20px var(--mono); color: var(--muted); }
.release .files { display: flex; flex-wrap: wrap; gap: 8px 20px; font: 400 14px/20px var(--mono); }
.release .files a { color: var(--cyantext); text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 720px) {
  h1 { font-size: 40px; line-height: 44px; }
  h2 { font-size: 32px; line-height: 36px; }
  .wrap { padding-left: 20px; padding-right: 20px; }
  section { padding-top: 48px; padding-bottom: 48px; }
  .slab, .updates, .cta { padding: 24px; }
  .panel, .card { padding: 24px; }
  .hero .caption { margin-top: -24px; }
  .num-row .big { font-size: 48px; line-height: 48px; min-width: 120px; }
}

.accent-link { color: var(--cyantext); text-decoration: underline; text-underline-offset: 4px; }
.page > header { display: flex; flex-direction: column; gap: 12px; }
.page .lead { max-width: 720px; }

/* The user guide */
.pager { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.card h2 { font-size: 24px; line-height: 28px; }
.card h2 a { color: inherit; text-decoration: none; }
.card h2 a:hover, .card h2 a:focus-visible { text-decoration: underline; text-underline-offset: 4px; }
.eyebrow a { color: inherit; }
.prose kbd { font: 500 13px/16px var(--mono); background: var(--s2); padding: 1px 6px; border: 1px solid var(--line); }
.prose .note { background: var(--s2); padding: 16px 20px; }
.prose h3 { margin-top: 12px; }

/* The developer docs: generated pages hold wide tables and long code lines */
.docs { max-width: 820px; }
.docs table { display: block; overflow-x: auto; }
.docs h2 { margin-top: 32px; }
.docs h3 { font-size: 22px; line-height: 28px; margin-top: 8px; }
.docs h4 { font: 500 12px/16px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.docs code { overflow-wrap: anywhere; }
.docs pre code { overflow-wrap: normal; }
.source { max-width: 820px; font-size: 14px; line-height: 20px; }
.source code { background: var(--s2); padding: 0 6px; }
.card.featured { flex-basis: 100%; }