/* Voltage Synths site styles.
   Hand written, no build step, no framework, no webfont. The palette is the
   panel palette: black header band, cream instrument face, teal ink, walnut
   rails and orange indicators. */

:root {
  --ink: #161717;
  --ink-deep: #0f110f;
  --ink-soft: #232524;
  --paper: #ede4d6;
  --paper-warm: #ded1bd;
  --cream: #d6c7b4;
  --teal: #22868f;
  --teal-bright: #2697a2;
  --orange: #f2701b;
  --walnut: #552f1a;
  --text-on-dark: #e7e2d8;
  --text-on-dark-dim: #a8a49b;
  --text-on-paper: #23201c;
  --text-on-paper-dim: #5d564c;
  --rule-dark: rgba(231, 226, 216, 0.14);
  --rule-paper: rgba(35, 32, 28, 0.14);
  --shell: 1220px;
  --pad: clamp(1.1rem, 4vw, 3rem);
  --display: ui-sans-serif, "Helvetica Neue", "Segoe UI", Roboto, Arial, sans-serif;
  --body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--text-on-dark);
  font-family: var(--body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
  line-height: 1.62;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.3rem, 1.5rem + 3.6vw, 4.1rem);
}

h2 {
  font-size: clamp(1.85rem, 1.3rem + 2.3vw, 3rem);
}

h3 {
  font-size: clamp(1.14rem, 1.02rem + 0.5vw, 1.36rem);
  letter-spacing: -0.005em;
}

h4 {
  font-size: 1.02rem;
  letter-spacing: -0.005em;
}

p {
  margin: 0 0 1.05em;
}

p:last-child {
  margin-bottom: 0;
}

em {
  font-style: normal;
  color: var(--orange);
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  word-break: break-word;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--orange);
  color: #14100c;
  padding: 0.6rem 1rem;
  z-index: 20;
  font-weight: 700;
}

.skip-link:focus {
  left: 0;
}

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

/* ------------------------------------------------------------------ shell */

.section-shell,
.nav-shell,
.footer-shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* --------------------------------------------------------------- header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(22, 23, 23, 0.94);
  border-bottom: 1px solid var(--rule-dark);
  backdrop-filter: blur(8px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.brand-mark {
  color: var(--teal-bright);
  font-size: 1.6rem;
  line-height: 1;
  transform: translateY(-1px);
}

.brand-type {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-type strong {
  font-family: var(--display);
  font-size: 0.98rem;
  letter-spacing: 0.24em;
}

.brand-type small {
  font-size: 0.66rem;
  letter-spacing: 0.42em;
  color: var(--text-on-dark-dim);
  margin-top: 3px;
}

.desktop-nav {
  display: none;
}

.nav-links {
  display: flex;
  gap: clamp(0.9rem, 2vw, 1.9rem);
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--text-on-dark-dim);
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--text-on-dark);
  border-bottom-color: var(--orange);
}

.menu summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--rule-dark);
  padding: 0.5rem 0.85rem;
  border-radius: 2px;
}

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

.menu summary i {
  width: 14px;
  height: 1px;
  background: currentColor;
  box-shadow: 0 4px 0 currentColor, 0 -4px 0 currentColor;
}

.menu-panel {
  position: absolute;
  right: var(--pad);
  margin-top: 0.6rem;
  background: var(--ink-soft);
  border: 1px solid var(--rule-dark);
  padding: 1rem 1.2rem;
  border-radius: 3px;
}

.menu-panel .nav-links {
  flex-direction: column;
  gap: 0.35rem;
}

@media (min-width: 860px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
  }

  .menu {
    display: none;
  }
}

/* ----------------------------------------------------------- status rail */

.status-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1.1rem;
  background: var(--ink-deep);
  border-bottom: 1px solid var(--rule-dark);
  padding: 0.55rem var(--pad);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
}

.status-rail strong {
  color: var(--teal-bright);
  letter-spacing: 0.2em;
}

.status-rail a {
  margin-left: auto;
  color: var(--text-on-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(242, 112, 27, 0.22);
}

@media (max-width: 620px) {
  .status-rail {
    flex-wrap: nowrap;
    gap: 0.55rem;
    min-height: 42px;
  }

  .status-rail > span:not(.status-dot) {
    display: none;
  }

  .status-rail a {
    font-size: 0.62rem;
    letter-spacing: 0.14em;
  }
}

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

.hero {
  padding: clamp(2.6rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3.4rem);
  background:
    radial-gradient(1100px 520px at 12% -10%, rgba(38, 151, 162, 0.16), transparent 65%),
    var(--ink);
}

.hero-shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: var(--pad);
  display: grid;
  gap: clamp(2rem, 5vw, 3.4rem);
}

@media (min-width: 1040px) {
  .hero-shell {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
  margin-bottom: 1.1rem;
}

.eyebrow span:first-child {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--rule-dark);
  color: var(--orange);
  letter-spacing: 0.12em;
}

.hero-lede {
  color: var(--text-on-dark-dim);
  font-size: clamp(1.02rem, 0.97rem + 0.28vw, 1.16rem);
  margin-top: 1.3rem;
  max-width: 56ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.9rem;
}

.button {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.8rem 1.3rem;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid transparent;
  min-width: 15rem;
}

.button span {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.72;
}

.button strong {
  font-family: var(--display);
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.button-primary {
  background: var(--orange);
  color: #17110a;
}

.button-primary:hover {
  background: #ff8134;
}

.button-secondary {
  border-color: var(--rule-dark);
  color: var(--text-on-dark);
  background: rgba(231, 226, 216, 0.05);
}

.button-secondary:hover {
  border-color: var(--teal-bright);
}

.button-dark {
  background: var(--ink);
  color: var(--text-on-dark);
}

.button-dark:hover {
  background: var(--ink-soft);
}

.promise-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  border-top: 1px solid var(--rule-dark);
  padding-top: 1.4rem;
}

.promise-list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.95rem;
  color: var(--text-on-dark-dim);
}

.promise-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--teal-bright);
}

.hero-machine {
  margin: 0;
}

.interface-label {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
  padding-bottom: 0.5rem;
}

.interface-label span:first-child {
  color: var(--orange);
}

.machine-frame,
.graphic-card picture,
.machine-card-media picture,
.roadmap-media {
  border: 1px solid var(--rule-dark);
  border-radius: 3px;
  overflow: hidden;
  background: var(--ink-deep);
}

.hero-machine figcaption,
.graphic-card figcaption {
  display: grid;
  gap: 0.3rem;
  margin-top: 0.85rem;
  font-size: 0.87rem;
  color: var(--text-on-dark-dim);
}

.hero-machine figcaption strong,
.graphic-card figcaption strong {
  color: var(--text-on-dark);
}

/* -------------------------------------------------------------- fact bar */

.fact-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--rule-dark);
  border-block: 1px solid var(--rule-dark);
}

.fact-bar div {
  background: var(--ink-deep);
  padding: 1.4rem var(--pad);
  display: grid;
  gap: 0.25rem;
}

.fact-bar strong {
  font-family: var(--display);
  font-size: clamp(1.7rem, 1.3rem + 1.4vw, 2.4rem);
  line-height: 1;
  color: var(--teal-bright);
}

.fact-bar span {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
}

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

.section {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.section-paper {
  background: var(--paper);
  color: var(--text-on-paper);
}

.section-paper .eyebrow,
.section-paper .hero-lede,
.section-paper .section-heading > p {
  color: var(--text-on-paper-dim);
}

.section-paper .eyebrow span:first-child {
  border-color: var(--rule-paper);
  color: var(--walnut);
}

.section-paper em {
  color: var(--walnut);
}

.section-dark {
  background: var(--ink-deep);
}

.section-heading {
  max-width: 62ch;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
}

.section-heading > p {
  margin-top: 1.1rem;
  color: var(--text-on-dark-dim);
}

.section-heading-split {
  max-width: none;
  display: grid;
  gap: 1.4rem;
  align-items: end;
}

@media (min-width: 900px) {
  .section-heading-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .section-heading-split > p {
    margin-top: 0;
  }
}

.long-copy {
  max-width: 68ch;
}

.long-copy-wide {
  max-width: 76ch;
  column-gap: 2.6rem;
}

.long-copy p + p {
  margin-top: 0;
}

.substance-story {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 980px) {
  .substance-story {
    grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
  }
}

.substance-product {
  margin: 0;
}

.substance-product picture {
  display: block;
  overflow: hidden;
  border: 1px solid #b8ae9b;
  border-radius: 3px;
  background: var(--ink-deep);
  box-shadow: 0 1.2rem 2.8rem rgb(43 34 24 / 16%);
}

.substance-product img {
  display: block;
  width: 100%;
  height: auto;
}

.product-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.55rem;
  color: var(--text-on-paper-dim);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.product-label span:first-child {
  color: var(--walnut);
}

.substance-product figcaption {
  max-width: 66ch;
  margin-top: 0.8rem;
  color: var(--text-on-paper-dim);
  font-size: 0.84rem;
}

.not-a-claim,
.preview-note {
  border-left: 3px solid var(--orange);
  padding: 0.7rem 0 0.7rem 1rem;
  margin-top: 1.4rem;
  font-size: 0.93rem;
}

.preview-note {
  width: min(100%, var(--shell));
  margin-inline: auto;
  margin-block: 0 clamp(1.6rem, 4vw, 2.6rem);
  color: var(--text-on-dark-dim);
}

@media (min-width: 900px) {
  .preview-note {
    padding-left: calc(var(--pad) + 1rem);
    border-left-width: 3px;
    margin-left: max(0px, calc(50vw - var(--shell) / 2));
  }
}

.approach-grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
}

@media (min-width: 980px) {
  .approach-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

.graphic-card {
  margin: 0;
}

.discovery-grid {
  display: grid;
  gap: 1px;
  background: var(--rule-dark);
  border: 1px solid var(--rule-dark);
  margin-top: clamp(2rem, 4vw, 3rem);
}

@media (min-width: 760px) {
  .discovery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .discovery-grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.discovery-grid article {
  background: var(--ink);
  padding: clamp(1.3rem, 3vw, 1.9rem);
}

.discovery-grid span {
  display: inline-block;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin-bottom: 0.7rem;
}

.discovery-grid h3 {
  margin-bottom: 0.6rem;
}

.discovery-grid p {
  color: var(--text-on-dark-dim);
  font-size: 0.94rem;
}

.discovery-grid-paper {
  border-color: var(--rule-paper);
  background: var(--rule-paper);
}

.discovery-grid-paper article {
  background: #efe9dc;
}

.discovery-grid-paper span {
  color: var(--walnut);
}

.discovery-grid-paper h3 {
  color: var(--text-on-paper);
}

.discovery-grid-paper p {
  color: var(--text-on-paper-dim);
}

/* ------------------------------------------------------- family overview */

.family-overview {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

@media (min-width: 900px) {
  .family-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.family-series {
  border: 1px solid var(--rule-dark);
  background: var(--ink);
}

.family-series > header {
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border-bottom: 1px solid var(--rule-dark);
}

.family-series > header span,
.family-instrument > span {
  display: inline-block;
  margin-bottom: 0.55rem;
  color: var(--orange);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
}

.family-series-grid {
  display: grid;
}

@media (min-width: 620px) and (max-width: 899px) {
  .family-series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.family-instrument {
  min-width: 0;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border-bottom: 1px solid var(--rule-dark);
}

.family-instrument:last-child {
  border-bottom: 0;
}

@media (min-width: 620px) and (max-width: 899px) {
  .family-instrument {
    border-bottom: 0;
    border-right: 1px solid var(--rule-dark);
  }

  .family-instrument:last-child {
    border-right: 0;
  }
}

.family-instrument h4 {
  margin-bottom: 0.55rem;
}

.family-instrument p {
  color: var(--text-on-dark-dim);
  font-size: 0.94rem;
}

.family-instrument strong {
  display: block;
  margin-top: 0.9rem;
  color: var(--teal-bright);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

/* ----------------------------------------------------------- family tree */

.family-tree {
  display: grid;
  justify-items: center;
  width: min(100%, 960px);
  margin-inline: auto;
}

.family-node {
  width: 100%;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--rule-dark);
  background: var(--ink);
}

.family-node-root {
  max-width: 760px;
  border-color: var(--teal-bright);
}

.family-node-substance,
.family-node-madre,
.family-node-foundation {
  max-width: 680px;
}

.family-node-substance {
  border-color: var(--orange);
}

.family-node-madre {
  border-color: var(--teal-bright);
  background: rgba(38, 151, 162, 0.05);
}

.family-node-foundation {
  border-color: var(--teal);
  background: rgba(38, 151, 162, 0.08);
}

.family-node span {
  display: inline-block;
  margin-bottom: 0.65rem;
  color: var(--orange);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
}

.family-node h3 {
  margin-bottom: 0.55rem;
}

.family-node p {
  color: var(--text-on-dark-dim);
}

.family-node strong {
  display: block;
  margin-top: 0.9rem;
  color: var(--teal-bright);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.family-connector {
  width: 1px;
  height: clamp(1.4rem, 4vw, 2.2rem);
  background: var(--teal);
}

.family-children {
  position: relative;
  width: 100%;
  display: grid;
  gap: clamp(1rem, 3vw, 1.8rem);
  padding-top: clamp(1.4rem, 4vw, 2.2rem);
}

.family-children::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 1px;
  height: clamp(1.4rem, 4vw, 2.2rem);
  background: var(--teal);
}

@media (min-width: 760px) {
  .family-children {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-top: clamp(2rem, 5vw, 3rem);
  }

  .family-children::before {
    left: 25%;
    right: 25%;
    width: auto;
    height: clamp(2rem, 5vw, 3rem);
    border-top: 1px solid var(--teal);
    border-left: 1px solid var(--teal);
    border-right: 1px solid var(--teal);
    background: transparent;
  }
}

.family-future {
  max-width: 680px;
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
  padding-top: clamp(1.3rem, 3vw, 2rem);
  border-top: 1px solid var(--rule-dark);
  color: var(--text-on-dark-dim);
  text-align: center;
}

.family-future strong {
  color: var(--text-on-dark);
}

.engineering-grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
  margin-top: clamp(1.6rem, 3vw, 2.4rem);
}

@media (min-width: 980px) {
  .engineering-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

.code-contract {
  border: 1px solid var(--rule-dark);
  border-radius: 3px;
  background: #101211;
  overflow: hidden;
}

.code-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--rule-dark);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
}

.code-head span:last-child {
  color: var(--teal-bright);
}

.code-contract pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--text-on-dark-dim);
}

.text-link {
  display: inline-block;
  margin-top: 1.1rem;
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 2px;
}

/* ------------------------------------------------------------- final cta */

.final-cta {
  display: grid;
  gap: 1.6rem;
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(2.6rem, 6vw, 4.6rem) var(--pad);
}

@media (min-width: 900px) {
  .final-cta {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }
}

.final-cta p {
  color: var(--text-on-dark-dim);
  max-width: 52ch;
}

.final-cta .button {
  margin-top: 1.4rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.cta-actions .button {
  margin-top: 0;
}

.section-button {
  margin-top: clamp(1.6rem, 3vw, 2.4rem);
}

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

.page-hero {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(2.4rem, 6vw, 4.4rem) var(--pad) clamp(1.6rem, 4vw, 2.6rem);
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .page-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }
}

.page-hero > p {
  color: var(--text-on-dark-dim);
}

.page-hero-compact {
  padding-bottom: clamp(1rem, 3vw, 1.8rem);
}

/* -------------------------------------------------------------- machines */

.machine-section {
  padding: clamp(1.4rem, 3vw, 2.4rem) 0 clamp(2.4rem, 5vw, 4rem);
}

.machine-card {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.6rem);
  padding: clamp(1.4rem, 3vw, 2.2rem) 0;
  border-top: 1px solid var(--rule-dark);
  scroll-margin-top: 7rem;
}

.machine-card:first-child {
  padding-top: 0;
  border-top: 0;
}

@media (min-width: 980px) {
  .machine-card {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .machine-card-reverse .machine-card-media {
    order: 2;
  }
}

.machine-state {
  display: inline-block;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  margin-bottom: 0.9rem;
}

.machine-state-engine {
  color: var(--teal-bright);
}

.machine-state-designed {
  color: var(--orange);
}

.machine-name {
  font-size: clamp(1.9rem, 1.4rem + 1.8vw, 2.6rem);
}

.machine-modelled {
  margin-top: 0.5rem;
  color: var(--teal-bright);
  font-size: 1.02rem;
}

.machine-card-body > p {
  color: var(--text-on-dark-dim);
}

.machine-facts {
  margin: 1.4rem 0 0;
  display: grid;
  gap: 0.75rem;
  border-top: 1px solid var(--rule-dark);
  padding-top: 1.1rem;
}

.machine-facts > div {
  display: grid;
  gap: 0.2rem;
}

.machine-facts dt {
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.machine-facts dd {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-on-dark-dim);
}

.roadmap-grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

@media (min-width: 700px) {
  .roadmap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .roadmap-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.roadmap-card h3 {
  margin-top: 0.9rem;
}

.roadmap-card p {
  margin-top: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-on-dark-dim);
}

.roadmap-media {
  position: relative;
}

.roadmap-flag {
  position: absolute;
  left: 0;
  bottom: 0;
  background: rgba(15, 17, 15, 0.9);
  color: var(--orange);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  padding: 0.3rem 0.55rem;
}

/* --------------------------------------------------------------- dossier */

.dossier-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: 0.9rem var(--pad);
  border-block: 1px solid var(--rule-dark);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.dossier-nav a {
  text-decoration: none;
  color: var(--text-on-dark-dim);
  border-bottom: 1px solid transparent;
}

.dossier-nav a:hover {
  color: var(--text-on-dark);
  border-bottom-color: var(--orange);
}

.proof-summary {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(1.2rem, 3vw, 2rem) var(--pad);
  display: grid;
  gap: 1px;
  background: var(--rule-dark);
}

@media (min-width: 760px) {
  .proof-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .proof-summary {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.proof-summary article {
  min-width: 0;
  padding: 1rem 1.1rem;
  background: var(--ink-deep);
}

.proof-summary span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--orange);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
}

.proof-summary strong {
  font-size: 0.88rem;
  line-height: 1.45;
}

.dossier-section {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(2.2rem, 5vw, 3.6rem) var(--pad);
}

.dossier-section-dark {
  width: 100%;
  max-width: none;
  background: var(--ink-deep);
  padding-inline: max(var(--pad), calc(50vw - var(--shell) / 2 + var(--pad)));
}

.dossier-section > header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--rule-dark);
  margin-bottom: 1.6rem;
}

.dossier-section > header span {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--orange);
  white-space: nowrap;
}

.dossier-list {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.2rem);
}

.dossier-list article {
  display: grid;
  gap: 0.9rem;
  padding-bottom: clamp(1.4rem, 3vw, 2.2rem);
  border-bottom: 1px solid var(--rule-dark);
}

.dossier-list article > div:last-child {
  min-width: 0;
}

.dossier-list article:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

@media (min-width: 780px) {
  .dossier-list article {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 1.6rem;
  }
}

.dossier-index {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--teal-bright);
  padding-top: 0.25rem;
}

.dossier-list h3 {
  margin-bottom: 0.7rem;
}

.dossier-list p {
  color: var(--text-on-dark-dim);
  max-width: 74ch;
}

.dossier-list article > div > strong:last-child {
  display: block;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--rule-dark);
  color: var(--text-on-dark);
  font-weight: 600;
  max-width: 74ch;
}

.source {
  font-size: 0.86rem;
  color: var(--text-on-dark-dim);
  opacity: 0.9;
}

.source code {
  color: var(--teal-bright);
}

.article-flag .dossier-index {
  color: var(--orange);
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  margin: 1.2rem 0;
  border: 1px solid var(--rule-dark);
  -webkit-overflow-scrolling: touch;
}

.figure-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
  font-size: 0.9rem;
}

.figure-table caption {
  caption-side: bottom;
  text-align: left;
  padding: 0.6rem 0.8rem;
  font-size: 0.78rem;
  color: var(--text-on-dark-dim);
}

.figure-table th,
.figure-table td {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--rule-dark);
}

.figure-table thead th {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.figure-table tbody td:not(:first-child) {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--text-on-dark);
  white-space: nowrap;
}

/* --------------------------------------------------------------- support */

.support-grid {
  width: min(100% - 2 * var(--pad), var(--shell));
  margin-inline: auto;
  margin-block: clamp(1rem, 3vw, 1.8rem) clamp(3rem, 6vw, 5rem);
  display: grid;
  gap: 1px;
  background: var(--rule-dark);
  border: 1px solid var(--rule-dark);
}

@media (min-width: 820px) {
  .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.support-grid article {
  background: var(--ink-deep);
  padding: clamp(1.4rem, 3vw, 2.2rem);
}

.support-grid span {
  display: inline-block;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin-bottom: 0.7rem;
}

.support-grid h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.85rem);
  margin-bottom: 0.7rem;
}

.support-grid p {
  color: var(--text-on-dark-dim);
}

.support-grid dl {
  margin: 1.1rem 0 0;
  display: grid;
  gap: 0.55rem;
}

.support-grid dl > div {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  border-bottom: 1px dashed var(--rule-dark);
  padding-bottom: 0.5rem;
}

.support-grid dt {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
}

.support-grid dd {
  margin: 0;
  font-size: 0.92rem;
  text-align: right;
}

.support-grid .button {
  margin-top: 1.2rem;
}

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

.site-footer {
  border-top: 1px solid var(--rule-dark);
  background: var(--ink-deep);
}

.footer-shell {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  padding-block: clamp(2.4rem, 5vw, 3.6rem);
}

@media (min-width: 980px) {
  .footer-shell {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr) minmax(0, 0.6fr);
  }
}

.footer-brand p {
  margin-top: 0.9rem;
  color: var(--text-on-dark-dim);
  font-size: 0.9rem;
}

.footer-notes p {
  font-size: 0.85rem;
  color: var(--text-on-dark-dim);
  max-width: 68ch;
}

.footer-notes strong {
  color: var(--text-on-dark);
}

.site-footer nav {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  font-size: 0.88rem;
}

.site-footer nav a {
  text-decoration: none;
  color: var(--text-on-dark-dim);
}

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

.footer-bottom {
  border-top: 1px solid var(--rule-dark);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: 1rem var(--pad);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}