:root {
  --color-canvas: #FFFFFF;
  --color-panel: #FAFBFC;
  --color-panel-raised: #F2F5F7;
  --color-deep: #0C1216;
  --color-border: #E4E8EC;
  --color-border-strong: #D8DEE4;
  --color-accent: #0AA5C6;
  --color-accent-dark: #067893;
  --color-ink: #16181D;
  --color-ink-muted: #5D6570;
  --color-success: #1B9E62;
  --color-warning: #C77E0A;
  --color-error: #D14343;
  --color-white-soft: rgba(255, 255, 255, .92);
  --color-white-muted: rgba(255, 255, 255, .45);
  --color-accent-glow: rgba(10, 165, 198, .16);
  --color-accent-faint: rgba(10, 165, 198, .07);
  --color-accent-wire: rgba(10, 165, 198, .35);
  --color-shadow-hair: rgba(12, 18, 22, .05);
  --color-shadow-mid: rgba(12, 18, 22, .12);
  --color-shadow-deep: rgba(12, 18, 22, .16);
  --color-inner-dim: rgba(12, 18, 22, .07);
  --color-overlay: rgba(12, 18, 22, .38);
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --header-height: 64px;
  --content-width: 1120px;
  --reading-width: 760px;
  --gutter: 32px;
  --space-section: 104px;
  --shadow-card: inset 0 1px 0 rgba(255, 255, 255, .9), 0 1px 2px var(--color-shadow-hair), 0 10px 24px -12px var(--color-shadow-mid), 0 28px 56px -20px var(--color-shadow-deep);
  --shadow-button: 0 1px 2px var(--color-shadow-hair), 0 8px 20px -10px var(--color-shadow-mid);
  --shadow-panel: 0 18px 44px -28px var(--color-shadow-deep);
  --transition-fast: 150ms ease;
  --transition-reveal: 560ms cubic-bezier(.22, 1, .36, 1);
}

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

html {
  scroll-behavior: smooth;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-body);
  -webkit-text-size-adjust: 100%;
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
header,
footer,
nav {
  min-width: 0;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

svg[aria-hidden="true"] {
  flex-shrink: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

ul,
ol {
  margin: 0;
}

code,
kbd,
samp {
  font-family: var(--font-mono);
}

:not(pre) > code {
  overflow-wrap: anywhere;
  color: var(--color-accent-dark);
}

pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-ink);
  font-family: var(--font-mono);
  line-height: 1.65;
  -webkit-overflow-scrolling: touch;
}

pre code {
  overflow-wrap: normal;
  white-space: pre;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 15px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-panel);
  font-weight: 700;
}

.wrap,
.shell {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-wrap {
  width: 100%;
  max-width: calc(var(--reading-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-safe > *,
.flex-safe > * {
  min-width: 0;
}

.icon,
.status-dot,
.badge-dot {
  flex-shrink: 0;
}

.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
  overflow-x: clip;
}

.section-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-ink);
  font-family: var(--font-display);
  text-wrap: balance;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(2.125rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.12;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -.018em;
  line-height: 1.18;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 750;
  line-height: 1.3;
}

h4 {
  margin-bottom: 8px;
  font-size: 1rem;
  font-weight: 750;
}

p {
  margin-bottom: 18px;
}

.text-muted {
  color: var(--color-ink-muted);
}

.title-keep,
.keyword-lock {
  white-space: nowrap;
}

.accent-text {
  color: var(--color-accent-dark);
}

.mono {
  font-family: var(--font-mono);
}

.lead {
  color: var(--color-ink-muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.75;
}

.prose {
  min-width: 0;
  color: var(--color-ink-muted);
}

.prose h2 {
  margin-top: 64px;
  color: var(--color-ink);
}

.prose h3 {
  margin-top: 38px;
  color: var(--color-ink);
}

.prose a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-wire);
  text-underline-offset: 3px;
}

.prose ul,
.prose ol {
  margin-bottom: 22px;
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 8px;
}

.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.card,
.panel {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.panel {
  padding: 28px;
}

.card {
  padding: 24px;
}

.tilt-card {
  transform: rotate(-.35deg);
  transform-origin: center;
}

.button,
.btn-main,
.btn-side,
.button-primary,
.button-secondary,
.button-quiet {
  display: inline-flex;
  min-height: 44px;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.btn-main,
.button-primary {
  border: 1px solid var(--color-ink);
  background: var(--color-ink);
  color: var(--color-canvas);
  box-shadow: var(--shadow-button);
}

.btn-side,
.button-secondary {
  border: 1px solid var(--color-border);
  background: var(--color-canvas);
  color: var(--color-ink);
}

.button-quiet {
  border: 1px solid transparent;
  background: var(--color-panel);
  color: var(--color-accent-dark);
}

.btn-main:hover,
.button-primary:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-side:hover,
.button-secondary:hover,
.button-quiet:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.button:focus-visible,
.btn-main:focus-visible,
.btn-side:focus-visible,
.button-primary:focus-visible,
.button-secondary:focus-visible,
.button-quiet:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.button[disabled],
button[disabled] {
  cursor: not-allowed;
  opacity: .5;
  transform: none;
}

.button-row,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

.site-header,
.topbar {
  position: relative;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas);
}

.header-inner,
.topbar-in {
  display: flex;
  height: var(--header-height);
  align-items: center;
  gap: 32px;
}

.site-brand,
.brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 10px;
}

.site-brand img,
.brand-logo {
  width: 28px;
  height: 28px;
  flex: none;
}

.site-brand-name,
.brand-name {
  font-family: var(--font-display);
  font-size: .97rem;
  font-weight: 800;
  letter-spacing: .01em;
  white-space: nowrap;
}

.desktop-nav,
.nav-tabs {
  display: flex;
  height: var(--header-height);
  align-items: stretch;
  gap: 4px;
  margin-right: auto;
}

.desktop-nav a,
.nav-tabs a {
  position: relative;
  display: flex;
  align-items: center;
  padding-inline: 13px;
  color: var(--color-ink-muted);
  font-size: .875rem;
  font-weight: 550;
  transition: color var(--transition-fast);
}

.desktop-nav a:hover,
.nav-tabs a:hover,
.desktop-nav a.is-active,
.nav-tabs a.is-here {
  color: var(--color-ink);
}

.desktop-nav a.is-active,
.nav-tabs a.is-here {
  font-weight: 700;
}

.desktop-nav a.is-active::after,
.nav-tabs a.is-here::after {
  position: absolute;
  right: 13px;
  bottom: -1px;
  left: 13px;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--color-accent);
  content: "";
}

.header-tools {
  position: relative;
  display: flex;
  flex: none;
  align-items: center;
  gap: 8px;
}

.language-picker {
  position: relative;
}

.language-toggle,
.lang-pick {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  gap: 6px;
  padding-inline: 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
  font-size: .8rem;
}

.language-toggle:hover,
.lang-pick:hover {
  border-color: var(--color-accent);
  color: var(--color-ink);
}

.language-short {
  display: none;
}

.language-menu {
  position: absolute;
  top: calc(100% + 9px);
  right: 0;
  width: 176px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-card);
}

.language-menu[hidden] {
  display: none;
}

.language-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  justify-content: space-between;
  padding-inline: 11px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
  font-size: .82rem;
}

.language-menu a:hover,
.language-menu a.is-current {
  background: var(--color-panel-raised);
  color: var(--color-ink);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-ink);
}

.menu-toggle-lines {
  position: relative;
  display: block;
  margin-inline: auto;
}

.menu-toggle-lines::before,
.menu-toggle-lines::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-toggle-lines::before {
  top: -6px;
}

.menu-toggle-lines::after {
  top: 6px;
}

.mobile-nav {
  display: none;
}

.mobile-nav-veil {
  display: none;
}

.site-footer {
  padding-top: 68px;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(150px, 1fr));
  gap: 44px;
}

.footer-brand {
  max-width: 330px;
}

.footer-brand-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-weight: 800;
}

.footer-brand-head img {
  width: 30px;
  height: 30px;
  flex: none;
}

.footer-brand p {
  color: var(--color-ink-muted);
  font-size: .88rem;
}

.footer-title {
  margin-bottom: 15px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.footer-links {
  padding: 0;
  list-style: none;
}

.footer-links li + li {
  margin-top: 9px;
}

.footer-links a {
  color: var(--color-ink-muted);
  font-size: .84rem;
}

.footer-links a:hover {
  color: var(--color-accent-dark);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  margin-top: 52px;
  padding-top: 22px;
  padding-bottom: 28px;
  border-top: 1px solid var(--color-border);
  color: var(--color-ink-muted);
  font-size: .78rem;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.hero {
  position: relative;
  overflow-x: clip;
  background: var(--color-canvas);
}

.hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='280' height='280' viewBox='0 0 280 280' preserveAspectRatio='xMidYMid slice'%3E%3Cg fill='none' stroke='%23E4E8EC' stroke-width='1'%3E%3Cpath d='M40 0v52h64v34'/%3E%3Cpath d='M0 96h58'/%3E%3Cpath d='M280 44h-72v40'/%3E%3Cpath d='M148 280v-58h70'/%3E%3Cpath d='M92 280v-44H36'/%3E%3Cpath d='M232 150v66'/%3E%3C/g%3E%3Cg fill='%23E4E8EC'%3E%3Crect x='101' y='83' width='7' height='7'/%3E%3Crect x='55' y='93' width='7' height='7'/%3E%3Crect x='204' y='81' width='7' height='7'/%3E%3Crect x='215' y='219' width='7' height='7'/%3E%3Crect x='33' y='233' width='7' height='7'/%3E%3Crect x='228' y='143' width='7' height='7'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 280px 280px;
  content: "";
  opacity: .5;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 28%, var(--color-ink) 30%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 50% 28%, var(--color-ink) 30%, transparent 78%);
}

.hero-inner,
.hero-in {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 32px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  min-height: 26px;
  max-width: 100%;
  align-items: center;
  gap: 8px;
  padding-inline: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-size: .78rem;
  letter-spacing: .02em;
}

.hero-badge b {
  color: var(--color-accent-dark);
  font-weight: 700;
}

.hero h1 {
  margin-top: 20px;
  margin-bottom: 0;
  font-size: clamp(2.125rem, 3.4vw, 3rem);
  line-height: 1.12;
}

.h1-line {
  display: block;
  white-space: nowrap;
}

.h1-mono {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -.03em;
}

.hero-sub {
  max-width: 660px;
  margin-top: 18px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: .94rem;
  line-height: 1.75;
}

.hero-sub strong {
  color: var(--color-ink);
  font-weight: 650;
}

.hero .cta-row {
  margin-top: 28px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
  padding: 0;
  list-style: none;
}

.chip-row li {
  display: inline-flex;
  min-height: 26px;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  padding-inline: 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
}

.chip-row li::before {
  width: 5px;
  height: 5px;
  flex: none;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.hero-rig,
.rig {
  position: relative;
  display: flex;
  width: 100%;
  flex-direction: column;
  align-items: center;
  margin-top: 36px;
  padding-bottom: 20px;
}

.hero-rig::before,
.rig::before {
  position: absolute;
  top: -64px;
  bottom: -20px;
  left: max(0px, calc(50% - 450px));
  right: max(0px, calc(50% - 450px));
  pointer-events: none;
  background: radial-gradient(closest-side, var(--color-accent-glow), var(--color-accent-faint) 52%, transparent 100%);
  content: "";
}

.editor-card {
  position: relative;
  z-index: 1;
  width: min(640px, 100%);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-card);
  text-align: left;
}

.editor-card::after {
  position: absolute;
  z-index: -1;
  right: 9%;
  bottom: -16px;
  left: 9%;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--color-accent-wire), transparent 72%);
  content: "";
  filter: blur(10px);
  opacity: .6;
}

.editor-top,
.ed-top {
  display: flex;
  height: 44px;
  align-items: center;
  padding: 0 12px 0 6px;
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--color-panel);
}

.editor-tabs,
.ed-tabs {
  display: flex;
  height: 44px;
  min-width: 0;
}

.editor-tab,
.ed-tab {
  position: relative;
  display: flex;
  align-items: center;
  padding-inline: 14px;
  border: 0;
  background: transparent;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: .78rem;
}

.editor-tab[aria-selected="true"],
.ed-tab[aria-selected="true"] {
  color: var(--color-accent-dark);
  font-weight: 700;
}

.editor-tab[aria-selected="true"]::after,
.ed-tab[aria-selected="true"]::after {
  position: absolute;
  right: 12px;
  bottom: -1px;
  left: 12px;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--color-accent);
  content: "";
}

.editor-file,
.ed-file {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  margin-right: 10px;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: .72rem;
}

.editor-file-dot,
.ed-file .dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--color-success);
}

.editor-copy,
.ed-copy {
  display: inline-flex;
  width: 28px;
  height: 28px;
  flex: none;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
}

.editor-copy:hover,
.ed-copy:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.editor-code,
.ed-code {
  overflow-x: auto;
  padding: 14px 20px 16px 12px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: inset 0 9px 12px -11px var(--color-inner-dim);
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.62;
  -webkit-overflow-scrolling: touch;
}

.code-line,
.ln {
  display: flex;
  min-width: max-content;
  white-space: pre;
}

.line-number,
.ln .no {
  width: 34px;
  flex: none;
  padding-right: 16px;
  color: var(--color-border-strong);
  font-size: .72rem;
  text-align: right;
  user-select: none;
}

.code-line code,
.ln code {
  color: var(--color-ink);
  font-family: var(--font-mono);
}

.code-highlight,
.ln .hl {
  color: var(--color-accent);
  font-weight: 700;
}

.drop-wire {
  position: relative;
  z-index: 1;
  width: 2px;
  height: 26px;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-wire);
}

.drop-wire::before {
  position: absolute;
  top: -5px;
  left: 50%;
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-accent);
  border-radius: 2px;
  background: var(--color-canvas);
  content: "";
  transform: translateX(-50%);
}

.drop-wire::after {
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
  transform: translateX(-50%);
}

.platform-circuit,
.platforms {
  position: relative;
  display: grid;
  width: min(640px, 100%);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  list-style: none;
}

.platform-circuit::before,
.platforms::before {
  position: absolute;
  top: 3px;
  right: 12.5%;
  left: 12.5%;
  height: 2px;
  border-radius: 1px;
  background: var(--color-accent);
  content: "";
  opacity: .5;
}

.platform-circuit li,
.platforms li {
  position: relative;
  display: flex;
  min-width: 0;
  justify-content: center;
  padding-top: 32px;
}

.platform-circuit li::before,
.platforms li::before {
  position: absolute;
  top: 4px;
  left: 50%;
  width: 2px;
  height: 20px;
  background: var(--color-accent);
  content: "";
  opacity: .5;
  transform: translateX(-50%);
}

.platform-circuit li::after,
.platforms li::after {
  position: absolute;
  top: 0;
  left: 50%;
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-canvas);
  content: "";
  transform: translateX(-50%);
}

.platform-chip,
.pf-chip {
  display: inline-flex;
  min-height: 40px;
  max-width: calc(100% - 8px);
  align-items: center;
  gap: 9px;
  padding-inline: 17px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  box-shadow: 0 1px 2px var(--color-shadow-hair), 0 6px 14px -8px var(--color-shadow-mid);
  color: var(--color-ink-muted);
  font-size: .8rem;
  font-weight: 550;
  white-space: nowrap;
}

.platform-chip:hover,
.pf-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
  transform: translateY(-1px);
}

.platform-chip svg,
.pf-chip svg {
  width: 16px;
  height: 16px;
  flex: none;
}

.dark-section,
.dark-tease {
  overflow-x: clip;
  background: var(--color-deep);
  color: var(--color-white-soft);
}

.dark-section h2,
.dark-section h3,
.dark-tease h2 {
  color: var(--color-white-soft);
}

.dark-section .text-muted,
.dark-tease .text-muted {
  color: var(--color-white-muted);
}

.dark-tease-inner,
.dark-tease-in {
  padding-top: 28px;
  padding-bottom: 64px;
}

.dark-eyebrow,
.dt-eyebrow {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
}

.dark-title,
.dt-title {
  margin-top: 12px;
  margin-bottom: 0;
  color: var(--color-white-soft);
  font-size: 1.5rem;
}

.dark-copy,
.dt-sub {
  margin-top: 8px;
  margin-bottom: 0;
  color: var(--color-white-muted);
  font-size: .84rem;
}

@media (max-width: 980px) {
  .desktop-nav {
    gap: 0;
  }

  .desktop-nav a {
    padding-inline: 8px;
  }

  .desktop-nav a.is-active::after {
    right: 8px;
    left: 8px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 20px;
    --space-section: 76px;
  }

  h1,
  .hero h1 {
    font-size: clamp(1.5rem, 7vw, 1.875rem);
    line-height: 1.16;
    letter-spacing: -.015em;
  }

  h2 {
    font-size: clamp(1.55rem, 6vw, 2rem);
  }

  .desktop-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-block;
  }

  .mobile-nav-veil {
    position: fixed;
    z-index: 80;
    inset: var(--header-height) 0 0;
    display: block;
    background: var(--color-overlay);
  }

  .mobile-nav-veil[hidden] {
    display: none;
  }

  .mobile-nav {
    position: absolute;
    z-index: 110;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: block;
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    padding: 10px var(--gutter) 18px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-canvas);
    box-shadow: var(--shadow-card);
    overscroll-behavior: contain;
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .mobile-nav ul {
    padding: 0;
    list-style: none;
  }

  .mobile-nav a {
    display: flex;
    width: 100%;
    min-height: 46px;
    align-items: center;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-ink-muted);
  }

  .mobile-nav a.is-active {
    color: var(--color-accent-dark);
    font-weight: 700;
  }

  .mobile-language-title {
    margin: 18px 12px 5px;
    color: var(--color-ink-muted);
    font-family: var(--font-mono);
    font-size: .72rem;
  }

  .mobile-language-links a {
    min-height: 44px;
  }

  .language-menu {
    display: none;
  }

  .hero-inner,
  .hero-in {
    padding-top: 26px;
  }

  .h1-line {
    white-space: normal;
  }

  .hero-rig,
  .rig {
    margin-top: 30px;
  }

  .editor-code,
  .ed-code {
    font-size: .75rem;
  }

  .platform-chip,
  .pf-chip {
    gap: 6px;
    padding-inline: 9px;
    font-size: .72rem;
  }

  .footer-grid {
    gap: 34px 24px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
  }

  .tilt-card,
  [class*="tilt"] {
    transform: none;
  }

  .brand-name,
  .site-brand-name {
    font-size: .86rem;
  }

  .language-full {
    display: none;
  }

  .language-short {
    display: inline;
  }

  .hero-badge {
    height: auto;
    min-height: 26px;
    padding-top: 4px;
    padding-bottom: 4px;
    text-align: left;
  }

  .hero-sub {
    font-size: .88rem;
  }

  .hero .cta-row {
    justify-content: center;
  }

  .chip-row {
    flex-direction: row;
    align-items: center;
  }

  .editor-top,
  .ed-top {
    padding-right: 7px;
  }

  .editor-tab,
  .ed-tab {
    padding-inline: 8px;
    font-size: .7rem;
  }

  .editor-tab[aria-selected="true"]::after,
  .ed-tab[aria-selected="true"]::after {
    right: 7px;
    left: 7px;
  }

  .editor-file,
  .ed-file {
    margin-right: 5px;
    font-size: .65rem;
  }

  .platform-circuit,
  .platforms {
    gap: 4px;
  }

  .platform-chip,
  .pf-chip {
    min-height: 38px;
    max-width: 100%;
    flex-direction: column;
    gap: 2px;
    padding: 5px 3px;
    white-space: normal;
  }

  .platform-chip svg,
  .pf-chip svg {
    width: 14px;
    height: 14px;
  }

  .panel,
  .card {
    padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 390px) {
  .site-brand-name,
  .brand-name {
    max-width: 132px;
    white-space: normal;
    line-height: 1.15;
  }

  .language-toggle {
    padding-inline: 9px;
  }

  .editor-file {
    display: none;
  }

  .editor-copy,
  .ed-copy {
    margin-left: auto;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}