:root {
  --ink: #0a0c0f;
  --ink-2: #0d1014;
  --panel: #12161c;
  --panel-2: #161b22;
  --code-bg: #0b0e13;
  --line: #232a33;
  --line-2: #2f3944;
  --fg: #e9e4d8;
  --muted: #a4aeb9;
  --faint: #838d99;

  --ember: #ff7a1a;
  --ember-2: #ffb14d;
  --ember-soft: rgba(255, 122, 26, 0.12);
  --steel: #7cbdf0;
  --steel-soft: rgba(99, 176, 230, 0.12);
  --green: #9fd6a6;
  --red: #ff9a9a;

  --display: 'Bricolage Grotesque', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --maxw: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--ember-2);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* focus and skip link */
:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ember);
  color: #1a0e04;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
  text-decoration: none;
}

/* header */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 12, 15, 0.9);
  border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(8px)) {
  header {
    background: rgba(10, 12, 15, 0.72);
    backdrop-filter: blur(10px);
  }
}
.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.brand:hover {
  text-decoration: none;
}
.brand svg {
  width: 22px;
  height: 22px;
}

/* product switcher */
.switch {
  display: inline-flex;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 3px;
  background: var(--code-bg);
  gap: 2px;
  margin-left: 4px;
}
.switch a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 15px;
  border-radius: 999px;
  line-height: 1;
}
.switch a:hover {
  color: var(--fg);
  text-decoration: none;
}
.switch a[aria-current='page'] {
  color: #1a0e04;
  background: var(--ember);
}

.nav-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--fg);
  text-decoration: none;
}
.nav-gh {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line-2);
  border-radius: 7px;
  padding: 8px 13px;
  color: var(--fg) !important;
  font-family: var(--mono);
  font-size: 13px;
}
.nav-gh:hover {
  border-color: var(--ember);
  background: var(--ember-soft);
  text-decoration: none;
}
.nav-pro {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 7px;
  padding: 8px 14px;
  border: 1px solid var(--ember);
  background: var(--ember);
  color: #14181d !important;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
}
.nav-pro:hover {
  border-color: var(--ember-2);
  background: var(--ember-2);
  text-decoration: none;
}

/* mobile nav */
.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: 7px;
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 12px;
  cursor: pointer;
  min-height: 40px;
}
.mobile-menu {
  display: none;
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu nav {
  display: flex;
  flex-direction: column;
  padding: 10px 0 16px;
}
.mobile-menu a {
  color: var(--muted);
  font-size: 15px;
  padding: 11px 4px;
  border-bottom: 1px solid var(--line);
}
.mobile-menu a:last-child {
  border-bottom: 0;
}

/* typography */
h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
}
h2,
h3 {
  scroll-margin-top: 84px;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ember);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--ember);
  opacity: 0.7;
}

/* hero */
main {
  display: block;
}
.hero {
  padding: 72px 0 20px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5.2vw, 3.7rem);
  margin: 0 0 20px;
  max-width: 24ch;
}
.hero h1 .h1-sub {
  display: block;
  font-size: clamp(1.35rem, 3.1vw, 2.15rem);
  color: var(--ember);
  margin-top: 6px;
  max-width: none;
  white-space: nowrap;
}
@media (max-width: 560px) {
  .hero h1 .h1-sub {
    white-space: normal;
  }
}
.hero .lede {
  font-size: clamp(1.05rem, 1.7vw, 1.24rem);
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 22px;
}
.hero .lede strong {
  color: var(--fg);
  font-weight: 600;
}

/* release status strip */
.status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 26px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--line-2);
  border-radius: 7px;
  padding: 6px 11px;
  background: var(--code-bg);
}
.chip b {
  color: var(--fg);
  font-weight: 600;
}
.chip .pip {
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--ember);
}
.chip.warn {
  border-color: rgba(255, 177, 77, 0.4);
  color: var(--ember-2);
}

/* buttons */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  padding: 12px 18px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--line-2);
  color: var(--fg) !important;
  background: transparent;
  min-height: 44px;
}
.btn:hover {
  border-color: var(--ember);
  background: var(--ember-soft);
  text-decoration: none;
}
.btn-primary {
  background: var(--ember);
  border-color: var(--ember);
  color: #1a0e04 !important;
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--ember-2);
  border-color: var(--ember-2);
}

/* sections */
section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
}
section.flush {
  border-top: 0;
}
.section-head {
  margin-bottom: 32px;
  max-width: 64ch;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  margin: 0 0 14px;
}
.section-head p {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0;
}
.lead-links {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
}
.mini-h {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 30px 0 14px;
}

/* diagram figure */
figure {
  margin: 0;
}
.diagram {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  overflow-x: auto;
}
.diagram img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}
.diagram img.diagram-td {
  display: none;
}
.figcaption {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 12px;
}

/* code */
.code {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.code + .code {
  margin-top: 14px;
}
.code-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}
.code-bar .file {
  color: var(--muted);
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.code-bar .lang {
  margin-left: auto;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 10.5px;
}
.code-bar.ts .lang {
  color: var(--steel);
}
.code-bar.sh .lang {
  color: var(--ember-2);
}
.copy {
  margin-left: 10px;
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--muted);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 11px;
  padding: 7px 11px;
  cursor: pointer;
  line-height: 1;
  min-height: 32px;
  min-width: 44px;
}
.copy:hover {
  color: var(--fg);
  border-color: var(--ember);
  background: var(--ember-soft);
}
.copy.ok {
  color: var(--green);
  border-color: rgba(159, 214, 166, 0.5);
}
.copy.err {
  color: var(--red);
  border-color: rgba(255, 154, 154, 0.5);
}
pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
}
pre code {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: #c9d1d9;
  white-space: pre;
}
pre.out code {
  color: var(--muted);
}
:where(.inline-code) {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.t-com {
  color: #7d8794;
  font-style: italic;
}
.t-str {
  color: var(--green);
}
.t-kw {
  color: #ff9f5a;
}
.t-fn {
  color: #8fc7ff;
}
.t-num {
  color: #e0a878;
}
.t-const {
  color: #f2a5a5;
}

/* notes and callouts */
.note {
  border-left: 2px solid var(--ember);
  background: var(--ember-soft);
  padding: 13px 16px;
  border-radius: 0 8px 8px 0;
  color: var(--muted);
  font-size: 0.96rem;
  margin: 18px 0 0;
}
.note strong {
  color: var(--fg);
}
.note.steel {
  border-left-color: var(--steel);
  background: var(--steel-soft);
}

/* cards */
.grid {
  display: grid;
  gap: 16px;
}
.grid.two {
  grid-template-columns: 1fr 1fr;
}
.grid.three {
  grid-template-columns: repeat(3, 1fr);
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
}
.card h3 {
  font-size: 1.12rem;
  margin: 0 0 8px;
}
.card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.96rem;
}
.card .k {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ember);
  margin-bottom: 10px;
}

/* definition-style guarantees list */
.guarantees {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.guarantees li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  align-items: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 14px 16px;
}
.guarantees .mark {
  font-family: var(--mono);
  font-weight: 700;
  line-height: 1.7;
}
.guarantees .yes {
  color: var(--green);
}
.guarantees .lim {
  color: var(--ember-2);
}
.guarantees li p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}
.guarantees li b {
  color: var(--fg);
  font-weight: 600;
}

/* tables */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  min-width: 720px;
}
caption {
  text-align: left;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--faint);
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}
th,
td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
thead th {
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--faint);
  background: var(--ink-2);
}
th[scope='row'] {
  color: var(--fg);
  font-weight: 600;
  font-family: var(--sans);
}
tbody tr:last-child td {
  border-bottom: 0;
}
td .em {
  color: var(--ember-2);
}
.badge-native {
  color: var(--green);
  font-weight: 600;
}
.badge-partial {
  color: var(--ember-2);
  font-weight: 600;
}
.badge-planned {
  color: var(--faint);
  font-weight: 600;
}

/* steps */
.steps {
  display: grid;
  gap: 0;
  counter-reset: step;
}
.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.step:last-child {
  border-bottom: 0;
}
.step .num {
  counter-increment: step;
  font-family: var(--mono);
  color: var(--ember);
  font-size: 14px;
  font-weight: 600;
  padding-top: 2px;
}
.step .num::before {
  content: counter(step, decimal-leading-zero);
}
.step h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}
.step p {
  color: var(--muted);
  margin: 0 0 12px;
  font-size: 0.97rem;
}
.step p:last-child {
  margin-bottom: 0;
}

/* faq */
details {
  border: 1px solid var(--line);
  border-radius: 9px;
  margin-bottom: 10px;
  background: var(--panel);
  overflow: hidden;
}
details[open] {
  border-color: var(--line-2);
}
summary {
  cursor: pointer;
  padding: 16px 20px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.08rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}
summary::-webkit-details-marker {
  display: none;
}
summary::after {
  content: '+';
  font-family: var(--mono);
  color: var(--ember);
  font-size: 1.4rem;
  font-weight: 400;
}
details[open] summary::after {
  content: '\2212';
}
details .body {
  padding: 0 20px 18px;
}
details p {
  color: var(--muted);
  margin: 0;
  font-size: 0.97rem;
}

/* provenance */
.qa {
  display: grid;
  gap: 14px;
}
.qa .row {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.qa .row:last-child {
  border-bottom: 0;
}
.qa .q {
  color: var(--fg);
  font-weight: 600;
}
.qa .a {
  color: var(--muted);
}

/* footer */
footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 56px;
  color: var(--faint);
  font-size: 0.9rem;
}
.foot-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  align-items: flex-start;
}
.foot-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.foot-links a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}
.disclaim {
  margin-top: 22px;
  font-size: 0.8rem;
  line-height: 1.6;
  max-width: 74ch;
}

/* wrap long tokens */
h1,
h2,
h3,
p,
li,
summary,
td,
th,
.inline-code,
.lede {
  overflow-wrap: break-word;
}

/* tablet */
@media (max-width: 820px) {
  section {
    padding: 46px 0;
  }
  .hero {
    padding: 52px 0 16px;
  }
  .grid.two {
    grid-template-columns: 1fr;
  }
  .grid.three {
    grid-template-columns: 1fr 1fr;
  }
  .diagram img.diagram-lr {
    display: none;
  }
  .diagram img.diagram-td {
    display: block;
  }
  pre code {
    white-space: pre-wrap;
    overflow-wrap: break-word;
    font-size: 12.5px;
  }
}

/* phone */
@media (max-width: 720px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav {
    gap: 12px;
  }
  .switch {
    margin-left: 0;
  }
  .switch a {
    padding: 6px 12px;
    font-size: 12px;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 18px;
  }
  section {
    padding: 40px 0;
  }
  .hero {
    padding: 40px 0 12px;
  }
  .hero h1 {
    font-size: clamp(1.7rem, 8vw, 2.4rem);
  }
  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
  .qa .row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  pre {
    padding: 13px 13px;
  }
  pre code {
    font-size: 11.5px;
    line-height: 1.62;
  }
  .step {
    grid-template-columns: 28px 1fr;
    gap: 12px;
  }
  table {
    font-size: 13px;
  }
  th,
  td {
    padding: 10px 12px;
  }
}

@media (max-width: 400px) {
  .wrap {
    padding: 0 14px;
  }
  .nav {
    gap: 8px;
  }
  .brand {
    font-size: 15px;
    gap: 6px;
  }
  .brand svg {
    width: 20px;
    height: 20px;
  }
  .switch a {
    padding: 5px 9px;
    font-size: 11.5px;
  }
  .nav-toggle {
    padding: 6px 9px;
    font-size: 12px;
  }
  pre code {
    font-size: 10.8px;
  }
}

@media (max-width: 380px) {
  .brand-label {
    display: none;
  }
}

/* motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
    animation: none !important;
  }
}