/* Inter and JetBrains Mono are under the SIL Open Font License. */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/inter-latin-wght-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: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("fonts/jetbrains-mono-latin-wght-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 follow MDN's foundation: color, type, radius, and layout. */
:root {
  color-scheme: light;
  --color-white: hsl(0deg 0% 100%);
  --color-black: hsl(0deg 0% 0%);

  --color-gray-90: hsl(212deg 7% 97%);
  --color-gray-80: hsl(212deg 7% 93.5%);
  --color-gray-60: hsl(212deg 7% 78%);
  --color-gray-40: hsl(212deg 7% 34%);
  --color-gray-20: hsl(212deg 7% 19%);

  --color-red-90: hsl(350deg 100% 95%);
  --color-red-50: hsl(350deg 84% 45%);
  --color-red-20: hsl(350deg 84% 39%);

  --color-green-90: hsl(145deg 40% 94%);
  --color-green-20: hsl(145deg 88% 19%);

  --color-blue-90: hsl(212deg 91% 96%);
  --color-blue-50: hsl(212deg 90% 39%);
  --color-blue-20: hsl(212deg 95% 32%);

  --color-purple-90: hsl(267deg 99% 97%);
  --color-purple-20: hsl(267deg 70% 40%);

  --color-text-primary: var(--color-black);
  --color-text-secondary: var(--color-gray-40);
  --color-text-red: var(--color-red-20);
  --color-text-green: var(--color-green-20);
  --color-text-blue: var(--color-blue-20);
  --color-text-purple: var(--color-purple-20);

  --color-background-page: var(--color-white);
  --color-background-primary: var(--color-gray-90);
  --color-background-secondary: var(--color-gray-80);
  --color-background-red: var(--color-red-90);
  --color-background-green: var(--color-green-90);
  --color-background-blue: var(--color-blue-90);
  --color-background-purple: var(--color-purple-90);

  --color-border-primary: var(--color-gray-60);
  --color-link-normal: var(--color-blue-20);
  --color-link-visited: var(--color-purple-20);

  --font-family-text: "Inter", sans-serif;
  --font-family-code: "JetBrains Mono", ui-monospace, monospace;
  --font-line-content: 1.75;
  --font-line-normal: 1.5;
  --font-line-header: 1.25;
  --font-line-ui: 1;
  --font-size-largest: 2.5rem;
  --font-size-larger: 2rem;
  --font-size-large: 1.5rem;
  --font-size-medium: 1.25rem;
  --font-size-normal: 1rem;
  --font-size-small: 0.8rem;
  --font-weight-normal: 400;
  --font-weight-bold: 600;

  --radius-normal: 0.25rem;
  --radius-card: 0.5rem;

  --layout-side-padding-min: 1rem;
  --layout-side-padding: max(1rem, calc((100vw - 1440px + 2rem) / 2));
  --layout-content-max: 48rem;
  --layout-page-max: 72rem;
  --navigation-height: 4.125rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  min-width: 320px;
  background: var(--color-background-page);
  color: var(--color-text-primary);
  font-family: var(--font-family-text);
  font-size: var(--font-size-normal);
  font-weight: var(--font-weight-normal);
  line-height: var(--font-line-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  isolation: isolate;
}
body::before {
  content: "";
  position: fixed;
  z-index: -1;
  top: 0;
  right: -4.5rem;
  width: min(22rem, 34vw);
  height: 100dvh;
  background: url("/keys/cluster-black.png") right center / auto 100% no-repeat;
  opacity: 0.34;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 26%);
  mask-image: linear-gradient(to right, transparent, #000 26%);
}
main { flex: 1; }
img { display: block; max-width: 100%; height: auto; }
button, input { color: inherit; font: inherit; }
a { color: var(--color-link-normal); }
:focus-visible {
  outline: 2px solid var(--color-blue-50);
  outline-offset: 2px;
}
::selection { background: var(--color-blue-90); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: var(--font-weight-normal); line-height: var(--font-line-header); }

#content,
#briefing,
#beats,
#sources,
#install {
  scroll-margin-top: calc(var(--navigation-height) + 0.75rem);
}

.skip {
  position: absolute;
  z-index: 80;
  top: -4rem;
  left: 1rem;
  padding: 0.5em 0.75em;
  border-radius: var(--radius-normal);
  background: var(--color-black);
  color: var(--color-white);
  font-size: 0.875em;
  text-decoration: none;
}
.skip:focus { top: 0.75rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  column-gap: 0.3125em;
  margin: 0;
  padding: 0.5em 0.75em;
  border: 1px solid transparent;
  border-radius: var(--radius-normal);
  background: transparent;
  color: var(--color-text-primary);
  font-family: var(--font-family-text);
  font-size: 0.875em;
  font-weight: 450;
  line-height: var(--font-line-ui);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.button[data-variant="primary"] {
  background: var(--color-black);
  color: var(--color-white);
}
.button[data-variant="primary"]:hover { background: var(--color-gray-40); }
.button[data-variant="secondary"] { border-color: currentcolor; }
.button[data-variant="secondary"]:hover { background: var(--color-gray-80); }
.button[aria-current="page"] { background: var(--color-background-blue); color: var(--color-text-blue); }

.site-header {
  --nav-bar: #18191b;
  --nav-ink: #f4f5f6;
  --nav-muted: #b8bbbf;
  --nav-line: #3c3e42;
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr) max-content;
  column-gap: 1rem;
  align-items: stretch;
  height: var(--navigation-height);
  padding-inline: var(--layout-side-padding);
  background: var(--nav-bar);
  border-bottom: 1px solid #2a2c30;
  color: var(--nav-ink);
}
.site-logo,
.site-actions,
.nav-toggle { align-self: center; }
.site-header:not(:has(.site-nav)) { grid-template-columns: 1fr max-content; }
.site-logo { display: block; color: var(--nav-ink); text-decoration: none; }
.site-logo img { width: auto; height: 2rem; }
.site-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 0.15rem;
  min-width: 0;
}
.nav-tab { display: flex; align-items: center; height: 100%; }
.nav-tab[data-area="tab"] { --tab-bg: #0c2746; --tab-fg: #a9cffc; }
.nav-tab[data-area="beats"] { --tab-bg: #3e220d; --tab-fg: #f0c09c; }
.nav-tab[data-area="sources"] { --tab-bg: #260e42; --tab-fg: #c2a6e0; }
.nav-tab[data-area="install"] { --tab-bg: #0c321d; --tab-fg: #82dfb0; }
.nav-tab-button {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin: 0;
  padding: 0.45rem 0.7rem;
  border: 0;
  border-radius: 0.25rem;
  background: transparent;
  color: var(--nav-ink);
  font: inherit;
  line-height: 1.25rem;
  white-space: nowrap;
  cursor: pointer;
}
.nav-tab-button::after {
  width: 0.38rem;
  height: 0.38rem;
  margin-top: -0.15rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  content: "";
  transform: rotate(45deg);
}
.nav-tab:hover .nav-tab-button,
.nav-tab:focus-within .nav-tab-button,
.nav-tab[data-open="true"] .nav-tab-button,
.nav-tab[data-current="page"] .nav-tab-button {
  background: var(--tab-bg);
  color: var(--tab-fg);
}
.nav-tab:hover .nav-tab-button::after,
.nav-tab:focus-within .nav-tab-button::after,
.nav-tab[data-open="true"] .nav-tab-button::after {
  margin-top: 0.15rem;
  transform: rotate(225deg);
}
.nav-panel {
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: 50;
  display: none;
  width: min(44rem, calc(100vw - 2rem));
  overflow: hidden;
  border: 1px solid var(--nav-line);
  background: var(--nav-bar);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  transform: translateX(-50%);
}
.nav-panel-title {
  margin: 0;
  padding: 0.75rem 1.25rem;
  background: var(--tab-bg);
  color: var(--tab-fg);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.3;
}
.nav-panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.15rem 2rem;
  padding: 0.9rem 1.25rem 1.05rem;
}
.nav-panel-label {
  margin: 0.35rem 0 0.15rem;
  color: var(--nav-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-panel a,
.nav-panel a:visited {
  display: block;
  padding: 0.4rem 0;
  color: var(--nav-ink);
  font-size: 0.95rem;
  text-decoration: none;
}
.nav-panel a:hover { text-decoration: underline; }
@media (min-width: 1101px) {
  .nav-tab:hover .nav-panel,
  .nav-tab:focus-within .nav-panel,
  .nav-tab[data-open="true"] .nav-panel { display: block; }
}
.site-actions { display: flex; align-items: center; gap: 0.5rem; }
.site-header .button { color: var(--nav-ink); }
.site-header .button[data-variant="primary"] { background: var(--nav-ink); color: var(--nav-bar); }
.site-header .button[data-variant="primary"]:hover { background: #fff; }
.site-header .button[data-variant="secondary"] { border-color: #6d7076; }
.site-header .button[aria-current="page"] {
  border-color: transparent;
  background: #0c321d;
  color: #82dfb0;
}
.nav-toggle { display: none; }

.column {
  width: min(var(--layout-page-max), calc(100% - 2 * var(--layout-side-padding)));
  margin-inline: auto;
}
.measure { max-width: var(--layout-content-max); }

.hero { padding-top: 2.5rem; }
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(15rem, 0.8fr);
  gap: 2rem 2.5rem;
  align-items: start;
}
.hero h1,
.simple h1 {
  margin: 0;
  font-size: var(--font-size-largest);
  font-weight: var(--font-weight-normal);
  line-height: var(--font-line-header);
}
.hero h1::after,
.simple h1::after {
  color: var(--color-blue-50);
  content: "_";
}
.lede {
  max-width: 40rem;
  margin: 1rem 0 0;
  font-size: var(--font-size-medium);
  line-height: var(--font-line-normal);
}
.lede a,
.prose a,
.simple a,
.steps a,
.section-head a,
.final-cta a:not(.button) {
  text-decoration: underline;
}
.lede a:visited,
.prose a:visited,
.simple a:visited,
.steps a:visited,
.section-head a:visited,
.final-cta a:not(.button):visited { color: var(--color-link-visited); }
.lede a:hover,
.prose a:hover,
.simple a:hover,
.steps a:hover,
.section-head a:hover,
.final-cta a:not(.button):hover { text-decoration: none; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin-top: 1.5rem; }
.meta {
  margin: 1rem 0 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

.areas {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.areas a {
  display: grid;
  gap: 0.2rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-normal);
  color: var(--color-text-blue);
  background: var(--color-background-blue);
  text-decoration: none;
}
.areas a[data-area="cyber"] { color: var(--color-text-red); background: var(--color-background-red); }
.areas a[data-area="ai"] { color: var(--color-text-purple); background: var(--color-background-purple); }
.areas a:hover { text-decoration: underline; }
.areas strong { font-size: var(--font-size-normal); font-weight: var(--font-weight-bold); }
.areas span { font-size: var(--font-size-small); font-weight: var(--font-weight-normal); }

.band,
.stage { padding-top: 3.5rem; }
.section-head { display: grid; gap: 0.5rem; margin-bottom: 1.25rem; }
.section-head h2,
.simple h2 {
  margin: 0;
  font-size: var(--font-size-large);
  font-weight: 500;
}
.simple h2 {
  margin-top: 2.5rem;
  font-size: var(--font-size-larger);
  font-weight: var(--font-weight-normal);
}
.section-head p:not(.eyebrow),
.prose { margin: 0; line-height: var(--font-line-content); }
.section-head p:not(.eyebrow) { max-width: var(--layout-content-max); }
.eyebrow {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.2;
  text-transform: uppercase;
}

.example {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-normal);
  background: var(--color-background-primary);
}
.example figcaption {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border-primary);
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}
.example iframe {
  display: block;
  width: 100%;
  height: 680px;
  border: 0;
  background: #07080d;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.cards article {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1rem;
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-card);
}
.cards h3 {
  margin: 0 0 0.75rem;
  font-size: var(--font-size-normal);
  font-weight: 500;
  line-height: var(--font-line-normal);
}
.cards p,
.lane-list p,
.steps p {
  margin: 0.35rem 0 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  line-height: 1.5;
}
.tag {
  margin: 0 0 0.75rem;
  font-size: var(--font-size-small);
  font-weight: 500;
}
.tag[data-area="cyber"] { color: var(--color-text-red); }
.tag[data-area="ai"] { color: var(--color-text-purple); }
.tag[data-area="account"] { color: var(--color-text-green); }

.lanes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2rem;
}
.lane h3 {
  margin: 0;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-normal);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.lane[data-area="cyber"] h3 { color: var(--color-text-red); background: var(--color-background-red); }
.lane[data-area="ai"] h3 { color: var(--color-text-purple); background: var(--color-background-purple); }
.lane-list {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border-primary);
}
.lane-list li { padding: 0.85rem 0; border-bottom: 1px solid var(--color-border-primary); }
.lane-list h4 {
  margin: 0;
  font-size: var(--font-size-normal);
  font-weight: 500;
  line-height: var(--font-line-normal);
}

.steps {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  border-top: 1px solid var(--color-border-primary);
}
.steps li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-primary);
}
.steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  padding-top: 0.15rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.05em;
}
.steps h3 {
  margin: 0;
  font-size: var(--font-size-normal);
  font-weight: var(--font-weight-bold);
  line-height: var(--font-line-normal);
}

.notecard {
  position: relative;
  max-width: var(--layout-content-max);
  margin: 1rem 0 0;
  padding: 0.25rem 1rem 0.25rem 2.75rem;
  border-inline-start: 2px solid var(--color-text-blue);
  border-radius: var(--radius-normal);
  background: var(--color-background-blue);
}
.notecard p { margin: 0.75rem 0; }
.notecard svg {
  position: absolute;
  top: 1.15rem;
  left: 1rem;
  width: 1rem;
  height: 1rem;
  fill: var(--color-text-blue);
}

.kbd,
code {
  padding: 0.125em 0.25em;
  border-radius: var(--radius-normal);
  background: var(--color-background-secondary);
  font-family: var(--font-family-code);
  font-size: 0.92em;
}
.kbd {
  padding: 0.0625em 0.3em;
  border: 1px solid var(--color-border-primary);
  border-bottom-width: 2px;
  background: var(--color-background-primary);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.final-cta {
  margin-top: 3.5rem;
  padding: 3.5rem 1.5rem;
  border-block: 1px solid var(--color-border-primary);
  text-align: center;
}
.final-cta h2 {
  margin: 0 auto;
  max-width: 18ch;
  font-size: var(--font-size-larger);
  font-weight: var(--font-weight-normal);
}
.final-cta p {
  margin: 0.75rem auto 0;
  max-width: 36rem;
  color: var(--color-text-secondary);
}
.final-cta .actions { justify-content: center; }

.site-footer {
  color: var(--color-text-secondary);
  background: var(--color-background-primary);
  border-top: 1px solid var(--color-border-primary);
}
.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.8fr 1.1fr;
  gap: 2rem 1.5rem;
  width: min(var(--layout-page-max), calc(100% - 2 * var(--layout-side-padding)));
  margin-inline: auto;
  padding-block: 2rem 2.5rem;
}
.footer-brand img { width: auto; height: 1.75rem; }
.footer-brand p,
.footer-contact p { margin: 0.75rem 0 0; font-size: var(--font-size-small); line-height: var(--font-line-normal); }
.site-footer h2 {
  margin: 0 0 0.75rem;
  color: var(--color-text-primary);
  font-size: var(--font-size-medium);
  font-weight: var(--font-weight-normal);
}
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li + li { margin-top: 0.45rem; }
.site-footer a { color: inherit; text-decoration: none; }
.site-footer a:hover { color: var(--color-text-primary); text-decoration: underline; }
.footer-contact a { font-weight: 500; }

.simple {
  width: min(var(--layout-content-max), calc(100% - 2 * var(--layout-side-padding)));
  margin-inline: auto;
  padding-block: 2.5rem 3rem;
  line-height: var(--font-line-content);
}
.simple .eyebrow { margin-bottom: 0.75rem; }
.simple .lede { font-size: var(--font-size-medium); }
.simple ul { padding-left: 1.25rem; }
.simple li + li { margin-top: 0.35rem; }
.simple .steps { margin-top: 0.5rem; }

@media (max-width: 1100px) {
  body::before { content: none; }
  .site-header {
    grid-template-columns: 1fr max-content;
    height: var(--navigation-height);
  }
  .site-header:has(.nav-toggle) .site-nav,
  .site-header:has(.nav-toggle) .site-actions { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header.menu-open {
    height: auto;
    grid-template-rows: var(--navigation-height) auto auto;
    grid-template-areas:
      "logo toggle"
      "nav nav"
      "actions actions";
    row-gap: 0.25rem;
    align-items: center;
    padding-bottom: 0.85rem;
  }
  .site-header.menu-open .site-logo { grid-area: logo; }
  .site-header.menu-open .nav-toggle { grid-area: toggle; justify-self: end; }
  .site-header.menu-open .site-nav {
    display: grid;
    grid-area: nav;
    justify-content: stretch;
    gap: 0.15rem;
  }
  .site-header.menu-open .nav-tab { display: block; height: auto; }
  .site-header.menu-open .nav-tab-button { width: 100%; justify-content: space-between; }
  .site-header.menu-open .nav-panel {
    position: static;
    display: none;
    width: auto;
    border: 0;
    box-shadow: none;
    transform: none;
  }
  .site-header.menu-open .nav-tab[data-open="true"] .nav-panel { display: block; }
  .site-header.menu-open .nav-panel-grid { grid-template-columns: 1fr; padding-inline: 0.85rem; }
  .site-header.menu-open .site-actions {
    display: flex;
    grid-area: actions;
    padding-top: 0.35rem;
  }
  .site-header.menu-open .site-actions .button { flex: 1; }
}

@media (max-width: 800px) {
  .hero-layout,
  .cards,
  .lanes,
  .footer-main { grid-template-columns: 1fr; }
  .hero h1,
  .simple h1 { font-size: 2rem; }
  .lede,
  .simple .lede { font-size: 1.125rem; }
  .example iframe { height: 560px; }
  .final-cta { padding: 2.5rem 1rem; }
}

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