:root {
  color-scheme: light;
  --ink: #111312;
  --ink-soft: #3e4742;
  --muted: #68736d;
  --paper: #f7f8f6;
  --paper-strong: #ffffff;
  --surface: rgba(255, 255, 255, 0.76);
  --surface-solid: #ffffff;
  --line: #d9dfd9;
  --line-strong: #b7c2ba;
  --carbon: #171c19;
  --mint: #00a878;
  --cyan: #0b7fab;
  --coral: #e15a3d;
  --gold: #bd7f19;
  --grid-line: rgba(17, 19, 18, 0.045);
  --pcb-trace: rgba(0, 168, 120, 0.14);
  --pcb-trace-soft: rgba(11, 127, 171, 0.11);
  --pcb-node: rgba(0, 168, 120, 0.22);
  --topbar-bg: rgba(247, 250, 247, 0.94);
  --terminal-bg: rgba(248, 252, 249, 0.92);
  --terminal-code-bg: rgba(255, 255, 255, 0.74);
  --terminal-line: rgba(0, 168, 120, 0.24);
  --terminal-grid: rgba(0, 168, 120, 0.12);
  --terminal-text: #143b2d;
  --terminal-muted: rgba(31, 64, 51, 0.64);
  --terminal-chrome-line: rgba(17, 45, 35, 0.14);
  --hero-scrim:
    linear-gradient(90deg, rgba(247, 250, 247, 0.96) 0%, rgba(247, 250, 247, 0.78) 48%, rgba(247, 250, 247, 0.3) 100%),
    radial-gradient(circle at 62% 34%, rgba(0, 168, 120, 0.18), transparent 34%),
    linear-gradient(0deg, rgba(247, 250, 247, 0.84) 0%, rgba(247, 250, 247, 0.08) 58%);
  --shadow: 0 16px 40px rgba(17, 19, 18, 0.12);
  --radius: 8px;
  --shell: 1180px;
  --font-sans: "Noto Sans SC", sans-serif;
  --font-display: "Space Grotesk", "Noto Sans SC", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #f3f5ef;
  --ink-soft: #b8c1b9;
  --muted: #7e8b82;
  --paper: #070a08;
  --paper-strong: #f8fff9;
  --surface: rgba(14, 19, 16, 0.78);
  --surface-solid: #101611;
  --line: rgba(215, 232, 218, 0.12);
  --line-strong: rgba(220, 240, 226, 0.2);
  --carbon: #050806;
  --mint: #62f2ba;
  --cyan: #75d8ff;
  --coral: #ff8c66;
  --gold: #e7b35c;
  --grid-line: rgba(225, 242, 229, 0.035);
  --pcb-trace: rgba(98, 242, 186, 0.13);
  --pcb-trace-soft: rgba(117, 216, 255, 0.1);
  --pcb-node: rgba(98, 242, 186, 0.24);
  --topbar-bg: rgba(7, 10, 8, 0.9);
  --terminal-bg: rgba(3, 7, 5, 0.94);
  --terminal-code-bg: rgba(0, 0, 0, 0.38);
  --terminal-line: rgba(98, 242, 186, 0.26);
  --terminal-grid: rgba(98, 242, 186, 0.1);
  --terminal-text: #b9ffe9;
  --terminal-muted: rgba(255, 255, 255, 0.56);
  --terminal-chrome-line: rgba(255, 255, 255, 0.12);
  --hero-scrim:
    linear-gradient(90deg, rgba(7, 10, 8, 0.96) 0%, rgba(7, 10, 8, 0.74) 46%, rgba(7, 10, 8, 0.26) 100%),
    radial-gradient(circle at 62% 34%, rgba(98, 242, 186, 0.2), transparent 34%),
    linear-gradient(0deg, rgba(7, 10, 8, 0.88) 0%, rgba(7, 10, 8, 0.1) 58%);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 98px;
  background: var(--paper);
  overflow-x: hidden;
}

body {
  position: relative;
  isolation: isolate;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 9% 10%, color-mix(in srgb, var(--mint) 16%, transparent), transparent 32%),
    radial-gradient(circle at 84% 8%, color-mix(in srgb, var(--cyan) 14%, transparent), transparent 34%),
    radial-gradient(circle at 68% 76%, color-mix(in srgb, var(--gold) 8%, transparent), transparent 30%),
    var(--paper);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
}

.site-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  contain: strict;
  transform: scale(1.012);
}

.site-background::before {
  position: absolute;
  inset: -12%;
  background:
    radial-gradient(circle at 32px 32px, color-mix(in srgb, var(--mint) 34%, transparent) 0 2px, transparent 3px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(0deg, var(--grid-line) 1px, transparent 1px);
  background-size: 216px 216px, 72px 72px, 72px 72px;
  content: "";
  opacity: 0.58;
  animation: background-grid-drift 34s linear infinite;
}

.site-background::after {
  position: absolute;
  inset: -18%;
  background:
    linear-gradient(115deg, transparent 0 34%, color-mix(in srgb, var(--mint) 20%, transparent) 43%, transparent 52% 100%),
    linear-gradient(22deg, transparent 0 48%, color-mix(in srgb, var(--cyan) 16%, transparent) 58%, transparent 68% 100%),
    conic-gradient(from 130deg at 58% 42%, transparent 0 22%, color-mix(in srgb, var(--gold) 10%, transparent) 28%, transparent 36% 100%);
  content: "";
  opacity: 0.46;
  filter: blur(6px);
  mix-blend-mode: multiply;
  transform: translate3d(-8%, -4%, 0);
  animation: background-scan 28s ease-in-out infinite alternate;
}

.site-background svg {
  position: absolute;
  inset: -8% -5%;
  width: 110%;
  height: 116%;
  opacity: 0.54;
  animation: background-line-drift 42s ease-in-out infinite alternate;
}

.bg-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  stroke-dasharray: 22 28;
}

.bg-line:nth-of-type(2n) {
  animation-duration: 23s;
  animation-direction: reverse;
}

.bg-line:nth-of-type(3n) {
  stroke-dasharray: 8 18;
  animation-duration: 15s;
}

.bg-line-math,
.bg-line-circuit {
  stroke: var(--pcb-trace);
}

.bg-line-wave {
  stroke: var(--pcb-trace-soft);
}

.bg-line-ai {
  stroke: color-mix(in srgb, var(--coral) 34%, var(--pcb-trace));
}

.bg-line-orbit,
.bg-line-neural {
  stroke: color-mix(in srgb, var(--gold) 36%, var(--pcb-trace));
}

.bg-line-signal {
  stroke: color-mix(in srgb, var(--cyan) 42%, var(--pcb-trace-soft));
}

.bg-line-beam {
  stroke: color-mix(in srgb, var(--mint) 58%, transparent);
  stroke-width: 2.8;
  stroke-dasharray: 4 22;
  animation: background-dash 24s linear infinite;
}

.bg-line-matrix {
  stroke: color-mix(in srgb, var(--cyan) 54%, var(--pcb-trace));
  stroke-width: 2.2;
  stroke-dasharray: 13 18;
  animation: background-dash 28s linear infinite reverse;
}

.bg-orbits ellipse {
  fill: none;
  stroke: color-mix(in srgb, var(--cyan) 34%, transparent);
  stroke-width: 1.4;
  stroke-dasharray: 7 16;
  transform-origin: center;
  animation: orbit-breathe 16s ease-in-out infinite;
}

.bg-orbits ellipse:nth-child(2) {
  animation-delay: -5s;
  animation-duration: 20s;
}

.bg-orbits ellipse:nth-child(3) {
  stroke: color-mix(in srgb, var(--gold) 22%, transparent);
  animation-delay: -9s;
  animation-duration: 18s;
}

.bg-orbits ellipse:nth-child(4) {
  stroke: color-mix(in srgb, var(--mint) 30%, transparent);
  stroke-dasharray: 4 12;
  animation-delay: -3s;
  animation-duration: 22s;
}

.bg-orbits ellipse:nth-child(5) {
  stroke: color-mix(in srgb, var(--coral) 20%, transparent);
  stroke-dasharray: 12 18;
  animation-delay: -11s;
  animation-duration: 26s;
}

.bg-radar circle,
.bg-radar path {
  fill: none;
  stroke: color-mix(in srgb, var(--mint) 30%, transparent);
  stroke-width: 1.2;
  stroke-dasharray: 5 14;
  transform-origin: 790px 590px;
  animation: radar-spin 12s linear infinite;
}

.bg-radar circle:nth-child(2) {
  animation-direction: reverse;
  animation-duration: 16s;
}

.bg-radar circle:nth-child(3) {
  animation-duration: 20s;
}

.bg-nodes circle {
  fill: var(--pcb-node);
  animation: node-pulse 4.8s ease-in-out infinite;
}

.bg-nodes circle:nth-child(3n) {
  animation-delay: -1.4s;
}

.bg-nodes circle:nth-child(4n) {
  animation-delay: -2.6s;
}

.bg-glyphs text {
  fill: color-mix(in srgb, var(--ink) 18%, transparent);
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0.08em;
  animation: glyph-float 11s ease-in-out infinite;
}

.bg-glyphs text:nth-child(2n) {
  animation-delay: -3.5s;
}

:root[data-theme="dark"] .site-background svg {
  opacity: 0.72;
}

:root[data-theme="dark"] .site-background::after {
  mix-blend-mode: screen;
  opacity: 0.42;
}

body > * {
  position: relative;
  z-index: 1;
}

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

button {
  border: 0;
  border-radius: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

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

.shell {
  width: min(calc(100% - 40px), var(--shell));
  margin: 0 auto;
}

.topbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 80;
  width: 100%;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, var(--topbar-bg), color-mix(in srgb, var(--topbar-bg) 82%, transparent)),
    linear-gradient(90deg, var(--pcb-trace) 1px, transparent 1px);
  background-size: auto, 64px 64px;
  box-shadow: 0 10px 30px rgba(17, 19, 18, 0.08);
  backdrop-filter: blur(20px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 40px), var(--shell));
  min-height: 72px;
  gap: 18px;
  padding: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0;
}

.brand-logo,
.brand-wordmark {
  position: relative;
  display: inline-block;
  flex: 0 0 auto;
}

.brand-logo {
  width: 44px;
  height: 44px;
}

.brand-wordmark {
  width: 190px;
  height: 37px;
}

.brand-logo-image,
.brand-wordmark-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-logo-image {
  transform: scale(1.18);
  transform-origin: center;
}

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

.nav-links,
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a,
.nav-github,
.nav-login {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover,
.nav-github:hover {
  color: var(--ink);
}

.nav-login {
  border: 1px solid color-mix(in srgb, var(--mint) 60%, transparent);
  background: color-mix(in srgb, var(--mint) 16%, var(--surface-solid));
  color: var(--ink);
  white-space: nowrap;
}

.nav-login:hover {
  border-color: var(--mint);
  background: var(--mint);
  color: #071411;
}

.lang-switch {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  background: var(--surface-solid);
}

.lang-button {
  min-width: 34px;
  height: 28px;
  padding: 0 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.lang-button.active {
  background: var(--ink);
  color: var(--paper);
}

.theme-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--surface-solid);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.theme-icon {
  display: inline-block;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
}

.mobile-theme-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: transparent;
}

.hero::after {
  display: none;
}

.hero-video {
  display: none;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--paper) 90%, transparent) 0%, color-mix(in srgb, var(--paper) 64%, transparent) 48%, transparent 100%),
    radial-gradient(circle at 62% 34%, color-mix(in srgb, var(--mint) 10%, transparent), transparent 36%);
}

:root[data-theme="dark"] .hero-scrim {
  background:
    linear-gradient(90deg, rgba(7, 10, 8, 0.9) 0%, rgba(7, 10, 8, 0.62) 46%, transparent 100%),
    radial-gradient(circle at 62% 34%, rgba(98, 242, 186, 0.12), transparent 36%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.72fr);
  gap: 48px;
  align-items: center;
  min-height: 100vh;
  padding: 112px 0 92px;
  color: var(--ink);
}

:root[data-theme="dark"] .hero-grid {
  color: var(--paper-strong);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-head h2,
.split-layout h2,
.final-panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.02;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(48px, 8vw, 92px);
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.hero-copy {
  min-width: 0;
}

.hero-lede {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

:root[data-theme="dark"] .hero-lede {
  color: rgba(255, 255, 255, 0.78);
}

.hero-principles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.hero-principles span {
  padding: 8px 11px;
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--surface-solid) 80%, var(--mint) 6%);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

:root[data-theme="dark"] .hero-principles span {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.78);
}

.hero-actions,
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid currentColor;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
}

.button-primary {
  border-color: var(--mint);
  background: var(--mint);
  color: #071411;
}

.button-secondary {
  border-color: var(--line-strong);
  color: var(--ink);
}

:root[data-theme="dark"] .button-secondary {
  border-color: rgba(255, 255, 255, 0.42);
  color: var(--paper-strong);
}

.hero-console {
  position: relative;
  overflow: hidden;
  min-width: 0;
  max-width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), transparent),
    var(--terminal-bg);
  color: var(--terminal-text);
  box-shadow: var(--shadow);
}

.hero-console::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 168, 120, 0.1) 48%, transparent 54%);
  content: "";
  transform: translateY(-100%);
  animation: console-scan 5.8s ease-in-out infinite;
}

.console-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.console-top {
  padding: 14px 16px;
  border-bottom: 1px solid var(--terminal-chrome-line);
  font-family: var(--font-mono);
  font-size: 12px;
}

.console-pill {
  padding: 2px 8px;
  border: 1px solid rgba(0, 168, 120, 0.4);
  color: var(--mint);
}

.console-pill.live {
  background: rgba(0, 168, 120, 0.16);
}

.console-body {
  padding: 18px;
}

.terminal-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--terminal-chrome-line);
  color: var(--terminal-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.terminal-tabs span {
  min-width: 0;
  overflow: hidden;
  padding: 10px 12px;
  border-right: 1px solid var(--terminal-chrome-line);
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

.terminal-tabs span:last-child {
  border-right: 0;
}

.terminal-tabs .active {
  background: rgba(98, 242, 186, 0.1);
  color: var(--mint);
}

pre {
  max-width: 100%;
  margin: 18px 0 0;
  overflow-x: auto;
  border: 1px solid var(--terminal-line);
  background: var(--terminal-code-bg);
  color: var(--terminal-text);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
}

pre code {
  display: block;
  padding: 16px;
}

.terminal-output code {
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.console-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  color: var(--terminal-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.console-actions span {
  min-width: 0;
  overflow-wrap: anywhere;
  text-align: right;
}

.console-refresh {
  padding: 8px 10px;
  border: 1px solid rgba(0, 168, 120, 0.34);
  color: var(--terminal-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
}

.console-refresh:disabled {
  cursor: wait;
  opacity: 0.5;
}

.section {
  padding: 92px 0;
}

main > .section:not(.hero) {
  position: relative;
  content-visibility: auto;
  contain-intrinsic-size: auto 860px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.quick-start {
  border-top: 1px solid var(--line);
}

main > .section:not(.hero) .shell {
  position: relative;
  z-index: 1;
}

.section-head {
  max-width: 760px;
  margin: 0 0 42px;
}

.section-head h2,
.split-layout h2,
.final-panel h2 {
  max-width: 780px;
  font-size: clamp(34px, 5vw, 58px);
}

.section-head p,
.section-copy {
  margin: 16px 0 0;
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 18px;
  overflow-wrap: anywhere;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.step-panel,
.board-card,
.video-card,
.mode-table,
.flow-map,
.capability-strip,
.final-panel {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(17, 19, 18, 0.05);
  backdrop-filter: blur(10px);
}

.step-panel,
.board-card,
.video-card,
.terminal-session-card {
  contain: layout paint;
}

.step-panel {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 24px;
}

.step-index {
  color: var(--coral);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.step-panel h3,
.board-card h3,
.video-card h3 {
  margin: 18px 0 8px;
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.16;
}

.step-panel p,
.board-card p,
.video-card p {
  margin: 0;
  color: var(--ink-soft);
}

.command-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  margin-top: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-solid) 82%, var(--mint) 8%);
  color: var(--ink);
}

.step-panel .command-line:first-of-type {
  margin-top: auto;
}

.command-line code {
  min-width: 0;
  overflow-x: auto;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
}

.steps-grid .command-line code {
  padding-inline: 10px;
  overflow-x: auto;
  white-space: nowrap;
}

.copy-btn,
.download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  min-width: 56px;
  padding: 0 12px;
  border-left: 1px solid var(--line);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.download-link {
  text-decoration: none;
}

.copy-btn.copied {
  background: var(--mint);
  color: #071411;
}

.terminal-command-list {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

.terminal-command {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--terminal-bg) 90%, var(--mint) 5%);
  color: var(--terminal-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.terminal-command::before {
  flex: 0 0 auto;
  color: var(--mint);
  content: "$";
}

.terminal-command code {
  min-width: 0;
  overflow-wrap: anywhere;
  font: inherit;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.8fr);
  gap: 44px;
  align-items: center;
}

.live-status-section .split-layout {
  grid-template-columns: minmax(400px, 1fr) minmax(460px, 0.88fr);
  gap: 40px;
}

.flow-map {
  padding: 22px;
}

.flow-node {
  padding: 15px;
  border: 1px solid var(--line-strong);
  background: var(--surface-solid);
  font-family: var(--font-mono);
  font-weight: 600;
  text-align: center;
}

.flow-node-strong {
  background: color-mix(in srgb, var(--surface-solid) 78%, var(--mint) 12%);
  color: var(--ink);
}

.flow-branch {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 10px 0;
}

.flow-branch span {
  padding: 10px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-solid) 86%, var(--mint) 5%);
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.terminal-stack {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 12px;
  align-items: stretch;
}

.live-status-section .terminal-stack {
  grid-template-columns: minmax(0, 1fr) 200px;
}

.terminal-session-card {
  overflow: hidden;
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--terminal-bg);
  color: var(--terminal-text);
  box-shadow: var(--shadow);
}

.terminal-session-card .console-top {
  border-bottom-color: var(--terminal-chrome-line);
}

.terminal-output {
  margin: 0;
  border-color: var(--terminal-line);
  background: var(--terminal-code-bg);
}

.hero-console .terminal-output {
  margin: 0;
}

.terminal-output-large {
  border-width: 0 0 1px;
  background: var(--terminal-code-bg);
  font-size: 13px;
}

.terminal-prompts {
  display: grid;
  grid-template-rows: repeat(4, minmax(0, 1fr));
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--terminal-bg) 90%, var(--mint) 4%);
  box-shadow: var(--shadow);
}

.terminal-prompts span {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  min-height: 0;
  padding: 15px 14px;
  border-bottom: 1px solid var(--terminal-chrome-line);
  color: var(--terminal-text);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.28;
}

.terminal-prompts span::before {
  flex: 0 0 auto;
  color: var(--mint);
  content: "$";
}

.terminal-prompts span:last-child {
  border-bottom: 0;
}

.terminal-prompts code {
  min-width: 0;
  overflow-wrap: anywhere;
  font: inherit;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.board-card {
  display: flex;
  min-height: 254px;
  flex-direction: column;
  padding: 24px;
}

.board-card-flip {
  position: relative;
  overflow: hidden;
  padding: 0;
  outline: none;
  perspective: 1200px;
}

.board-card-inner {
  position: relative;
  display: grid;
  min-height: 254px;
  will-change: transform;
  transform-style: preserve-3d;
  transition: transform 0.56s cubic-bezier(0.2, 0.76, 0.18, 1);
}

.board-card-flip:hover .board-card-inner,
.board-card-flip:focus-visible .board-card-inner {
  transform: rotateY(180deg);
}

.board-card-flip:focus-visible {
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--mint) 42%, transparent),
    var(--shadow);
}

.board-card-face {
  grid-area: 1 / 1;
  display: flex;
  min-height: 254px;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  backface-visibility: hidden;
}

.board-card-front {
  background: var(--surface);
}

.board-card-back {
  align-items: center;
  justify-content: center;
  gap: 12px;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--mint) 22%, transparent), transparent 38%),
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 74%, var(--cyan) 12%), color-mix(in srgb, var(--surface-solid) 78%, var(--gold) 8%));
  transform: rotateY(180deg);
}

.board-card-back img {
  width: 100%;
  height: 176px;
  min-height: 0;
  flex: 0 0 auto;
  object-fit: contain;
  transform: scale(var(--board-image-scale, 1));
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.14));
}

.board-image-taishanpi {
  --board-image-scale: 1.22;
}

.board-image-coloreasy {
  --board-image-scale: 1.08;
}

.board-image-pico2w {
  --board-image-scale: 1.12;
}

.board-card-back span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--mint) 38%, transparent);
  background: color-mix(in srgb, var(--surface-solid) 72%, transparent);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.board-card-main {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 78%, var(--mint) 10%), color-mix(in srgb, var(--surface-solid) 72%, var(--cyan) 10%)),
    var(--surface);
  color: var(--ink);
}

.board-card-main .board-card-front {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 78%, var(--mint) 10%), color-mix(in srgb, var(--surface-solid) 72%, var(--cyan) 10%)),
    var(--surface);
}

.board-grid .board-card:nth-child(2) {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 76%, var(--gold) 12%), color-mix(in srgb, var(--surface-solid) 74%, var(--mint) 10%)),
    var(--surface);
}

.board-grid .board-card:nth-child(2) .board-card-front {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 76%, var(--gold) 12%), color-mix(in srgb, var(--surface-solid) 74%, var(--mint) 10%)),
    var(--surface);
}

.board-grid .board-card:nth-child(3) {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 76%, var(--cyan) 13%), color-mix(in srgb, var(--surface-solid) 76%, var(--coral) 9%)),
    var(--surface);
}

.board-grid .board-card:nth-child(3) .board-card-front {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 76%, var(--cyan) 13%), color-mix(in srgb, var(--surface-solid) 76%, var(--coral) 9%)),
    var(--surface);
}

.board-card-main p {
  color: var(--ink-soft);
}

.board-card-main .card-kicker {
  color: var(--cyan);
  white-space: nowrap;
}

.card-kicker {
  margin: 0;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.board-card-more {
  border-style: dashed;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--cyan) 13%, transparent), transparent 44%),
    var(--surface);
}

:root[data-theme="dark"] .board-card-main {
  background:
    linear-gradient(135deg, rgba(98, 242, 186, 0.12), rgba(117, 216, 255, 0.08)),
    var(--carbon);
  color: var(--paper-strong);
}

:root[data-theme="dark"] .board-card-main .board-card-front {
  background:
    linear-gradient(135deg, rgba(98, 242, 186, 0.12), rgba(117, 216, 255, 0.08)),
    var(--carbon);
}

:root[data-theme="dark"] .board-grid .board-card:nth-child(2) {
  background:
    linear-gradient(135deg, rgba(231, 179, 92, 0.15), rgba(98, 242, 186, 0.08)),
    var(--carbon);
}

:root[data-theme="dark"] .board-grid .board-card:nth-child(2) .board-card-front {
  background:
    linear-gradient(135deg, rgba(231, 179, 92, 0.15), rgba(98, 242, 186, 0.08)),
    var(--carbon);
}

:root[data-theme="dark"] .board-grid .board-card:nth-child(3) {
  background:
    linear-gradient(135deg, rgba(117, 216, 255, 0.14), rgba(255, 140, 102, 0.08)),
    var(--carbon);
}

:root[data-theme="dark"] .board-grid .board-card:nth-child(3) .board-card-front {
  background:
    linear-gradient(135deg, rgba(117, 216, 255, 0.14), rgba(255, 140, 102, 0.08)),
    var(--carbon);
}

:root[data-theme="dark"] .board-card-back {
  background:
    radial-gradient(circle at 30% 20%, rgba(98, 242, 186, 0.22), transparent 38%),
    linear-gradient(135deg, rgba(8, 20, 15, 0.96), rgba(10, 25, 34, 0.94));
}

:root[data-theme="dark"] .board-card-back span {
  background: rgba(7, 10, 8, 0.68);
  color: var(--paper-strong);
}

:root[data-theme="dark"] .board-card-main p {
  color: rgba(255, 255, 255, 0.76);
}

:root[data-theme="dark"] .command-line,
:root[data-theme="dark"] .flow-node-strong {
  background: var(--carbon);
  color: var(--paper-strong);
}

:root[data-theme="dark"] .copy-btn {
  border-left-color: rgba(255, 255, 255, 0.18);
}

.capability-strip {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) 1fr;
  gap: 28px;
  align-items: center;
  padding: 28px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.capability-grid span {
  display: grid;
  min-height: 86px;
  place-items: center;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-solid) 86%, var(--mint) 5%);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.mode-table {
  overflow: hidden;
}

.mode-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.mode-row:last-child {
  border-bottom: 0;
}

.mode-row span {
  color: var(--coral);
  font-family: var(--font-mono);
  font-weight: 600;
}

.mode-row strong {
  font-size: 17px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.bili-video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.bili-video-card {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--carbon) 8%);
  box-shadow: 0 8px 24px rgba(17, 19, 18, 0.05);
  backdrop-filter: blur(10px);
  contain: layout paint;
}

.bili-frame-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(98, 242, 186, 0.12), rgba(117, 216, 255, 0.08)),
    var(--carbon);
}

.bili-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--carbon);
}

.bili-cover-button {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  overflow: hidden;
  border: 0;
  background: var(--carbon);
  cursor: pointer;
}

.bili-cover-button img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 180ms ease, filter 180ms ease;
}

.bili-cover-button:hover img,
.bili-cover-button:focus-visible img {
  transform: scale(1.025);
  filter: saturate(1.06) contrast(1.03);
}

.bili-cover-button:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: -3px;
}

.bili-play-mark {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--carbon) 72%, transparent);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
  transform: translate(-50%, -50%);
}

.bili-play-mark::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 17px;
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid var(--mint);
}

.bili-video-copy {
  display: grid;
  gap: 9px;
  padding: 18px;
}

.video-source,
.local-video-label span {
  width: max-content;
  color: var(--coral);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.bili-video-copy h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.16;
}

.bili-video-copy p {
  margin: 0;
  color: var(--ink-soft);
}

.bili-video-copy a {
  width: max-content;
  margin-top: 4px;
  color: var(--mint);
  font-weight: 700;
  text-decoration: none;
}

.bili-video-copy a:hover {
  color: var(--cyan);
}

.local-video-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0 14px;
}

.local-video-label::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.video-card {
  overflow: hidden;
}

.video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--carbon);
}

.video-thumb video {
  display: block;
  width: 100%;
  height: 100%;
  contain: paint;
  object-fit: cover;
}

.video-thumb .lazy-preview-video:not([src]) {
  background: var(--carbon);
}

.video-thumb span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.44);
  background: rgba(0, 0, 0, 0.42);
  color: var(--paper-strong);
  font-family: var(--font-mono);
  font-size: 12px;
}

.video-card h3,
.video-card p {
  padding-right: 18px;
  padding-left: 18px;
}

.video-card h3 {
  margin-top: 18px;
}

.video-card p {
  padding-bottom: 22px;
}

.final-panel {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 36px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-solid) 72%, var(--mint) 16%), color-mix(in srgb, var(--surface-solid) 76%, var(--cyan) 10%)),
    var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.final-panel::before {
  position: absolute;
  inset: -45% -10%;
  background:
    radial-gradient(circle at 22% 48%, color-mix(in srgb, var(--mint) 24%, transparent), transparent 28%),
    radial-gradient(circle at 82% 40%, color-mix(in srgb, var(--cyan) 18%, transparent), transparent 32%),
    linear-gradient(118deg, transparent 0 44%, color-mix(in srgb, var(--gold) 13%, transparent) 49%, transparent 56% 100%);
  content: "";
  opacity: 0.72;
  pointer-events: none;
}

.final-panel > * {
  position: relative;
  z-index: 1;
}

.final-panel .eyebrow {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--mint) 32%, transparent);
  background: color-mix(in srgb, var(--mint) 10%, transparent);
  color: var(--mint);
  letter-spacing: 0.12em;
}

.final-panel .button-secondary {
  border-color: var(--line-strong);
  color: var(--ink);
}

:root[data-theme="dark"] .final-panel {
  border-color: rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--carbon) 78%, var(--mint) 12%), color-mix(in srgb, var(--carbon) 80%, var(--cyan) 10%)),
    rgba(5, 8, 6, 0.88);
  color: var(--paper-strong);
}

:root[data-theme="dark"] .final-panel::before {
  opacity: 0.48;
}

:root[data-theme="dark"] .final-panel .eyebrow {
  border-color: rgba(98, 242, 186, 0.34);
  background: rgba(98, 242, 186, 0.1);
  color: var(--mint);
}

:root[data-theme="dark"] .final-panel .button-secondary {
  border-color: rgba(255, 255, 255, 0.36);
  color: var(--paper-strong);
}

.footer {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: transparent;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.7fr 0.7fr;
  gap: 40px;
  padding: 42px 0;
}

.footer p {
  max-width: 420px;
  margin: 12px 0 0;
  color: var(--ink-soft);
}

.footer h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 16px;
}

.footer a:not(.brand) {
  display: block;
  margin: 8px 0;
  color: var(--ink-soft);
  font-weight: 700;
}

.footer a:hover {
  color: var(--ink);
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.video-modal.active {
  display: flex;
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.86);
}

.video-modal-content {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
}

.video-modal-close {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  color: var(--paper-strong);
  font-family: var(--font-mono);
  font-size: 12px;
}

#video-modal-player {
  width: 100%;
  max-height: 80vh;
  background: #000;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.58s ease,
    transform 0.58s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes console-scan {
  0%,
  44% {
    transform: translateY(-100%);
  }

  62%,
  100% {
    transform: translateY(100%);
  }
}

@keyframes background-grid-drift {
  from {
    transform: translate3d(0, 0, 0);
  }

  to {
    transform: translate3d(-72px, -72px, 0);
  }
}

@keyframes background-line-drift {
  from {
    transform: translate3d(-1.2%, -0.8%, 0) scale(1);
  }

  to {
    transform: translate3d(1.2%, 1%, 0) scale(1.018);
  }
}

@keyframes background-scan {
  from {
    transform: translate3d(-8%, -4%, 0) rotate(-1deg);
  }

  to {
    transform: translate3d(8%, 5%, 0) rotate(1deg);
  }
}

@keyframes background-dash {
  to {
    stroke-dashoffset: -200;
  }
}

@keyframes radar-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes orbit-breathe {
  0%,
  100% {
    opacity: 0.28;
    transform: rotate(0deg) scale(1);
  }

  50% {
    opacity: 0.64;
    transform: rotate(2deg) scale(1.035);
  }
}

@keyframes glyph-float {
  0%,
  100% {
    opacity: 0.22;
    transform: translateY(0);
  }

  50% {
    opacity: 0.46;
    transform: translateY(-14px);
  }
}

@keyframes node-pulse {
  0%,
  100% {
    opacity: 0.38;
    r: 4;
  }

  48% {
    opacity: 0.92;
    r: 6;
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .split-layout,
  .capability-strip {
    grid-template-columns: 1fr;
  }

  .live-status-section .split-layout {
    grid-template-columns: 1fr;
  }

  .terminal-stack {
    grid-template-columns: 1fr;
  }

  .terminal-prompts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: none;
  }

  .terminal-prompts span {
    border-right: 1px solid var(--terminal-chrome-line);
    border-bottom: 0;
  }

  .terminal-prompts span:nth-child(2n) {
    border-right: 0;
  }

  .terminal-prompts span:nth-child(-n + 2) {
    border-bottom: 1px solid var(--terminal-chrome-line);
  }

  .terminal-prompts span:last-child {
    border-right: 0;
  }

  .hero-grid {
    gap: 28px;
    padding-top: 108px;
  }

  .steps-grid,
  .video-grid,
  .bili-video-grid {
    grid-template-columns: 1fr;
  }

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

  .board-card-main {
    grid-column: auto;
  }

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

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

@media (max-width: 720px) {
  .shell {
    width: min(calc(100% - 28px), var(--shell));
  }

  .brand-wordmark {
    width: 154px;
    height: 30px;
  }

  .topbar {
    top: 0;
    width: 100%;
  }

  .nav {
    position: relative;
    min-height: 62px;
    gap: 10px;
    width: min(calc(100% - 28px), var(--shell));
    padding: 0 10px;
  }

  .nav-actions {
    position: absolute;
    top: 50%;
    right: 46px;
    transform: translateY(-50%);
  }

  .nav-links {
    display: none;
  }

  .nav-github {
    display: none;
  }

  .nav-login {
    min-height: 34px;
    padding: 6px 10px;
    font-size: 13px;
  }

  .lang-switch {
    display: none;
  }

  .nav-actions .theme-button {
    display: none;
  }

  .theme-button {
    justify-content: center;
    min-width: 34px;
    min-height: 34px;
    border-color: var(--mint);
    background: var(--mint);
    color: #071411;
    padding: 0;
  }

  .theme-button [data-i18n] {
    display: none;
  }

  .mobile-theme-toggle {
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 40;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--mint);
    background: var(--mint);
    color: #071411;
  }

  .lang-button {
    min-width: 30px;
    padding: 0 6px;
  }

  .hero-grid {
    min-height: auto;
    padding-top: 104px;
  }

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

  .hero h1 {
    max-width: 340px;
    font-size: 40px;
    word-break: break-all;
  }

  .hero-lede {
    max-width: 340px;
    word-break: break-all;
  }

  .hero-lede,
  .section-head p,
  .section-copy {
    font-size: 16px;
  }

  .section {
    padding: 62px 0;
  }

  .section-head h2,
  .split-layout h2,
  .final-panel h2 {
    font-size: 32px;
  }

  .final-panel {
    align-items: flex-start;
    flex-direction: column;
  }

  .mode-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .console-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .console-actions span {
    text-align: left;
  }
}

@media (max-width: 420px) {
  .brand-wordmark {
    display: none;
  }

  .nav-actions {
    right: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}