:root {
  color-scheme: dark;
  --bg: #0a0c0b;
  --surface: #111411;
  --surface-2: #171b17;
  --line: #293029;
  --line-soft: #1d231e;
  --text: #f0f3ed;
  --muted: #929b91;
  --green: #b9f56a;
  --green-strong: #86d82f;
  --orange: #ff8a4c;
  --blue: #74b7ff;
  --yellow: #f7d36b;
  --shadow: 0 24px 70px rgba(0, 0, 0, .28);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f2f4ee;
  --surface: #fbfcf8;
  --surface-2: #e9ede4;
  --line: #cbd2c6;
  --line-soft: #dde2d9;
  --text: #171a16;
  --muted: #657064;
  --green: #578f19;
  --green-strong: #477b10;
  --orange: #cf5721;
  --blue: #246eaf;
  --yellow: #9d7410;
  --shadow: 0 24px 70px rgba(49, 63, 44, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }
.section-shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  padding-inline: max(20px, calc((100vw - 1180px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: -.03em; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--green);
  color: var(--green);
  font: 700 13px var(--mono);
}
nav { display: flex; gap: 34px; font-size: 14px; color: var(--muted); }
nav a:hover { color: var(--text); }
.theme-toggle {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}

.hero {
  min-height: 660px;
  padding: 92px 0 76px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 80px;
}
.hero h1 {
  max-width: 700px;
  margin: 18px 0 24px;
  font-size: clamp(44px, 6vw, 78px);
  line-height: 1.03;
  letter-spacing: -.065em;
}
.hero h1 span { color: var(--green); }
.eyebrow {
  margin: 0;
  color: var(--green);
  font: 600 12px/1.4 var(--mono);
  letter-spacing: .14em;
}
.live-dot, .status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}
.hero-lead { max-width: 610px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 21px;
  border: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
}
.button-primary { border-color: var(--green); background: var(--green); color: #10150b; }
.button-primary:hover { background: var(--green-strong); border-color: var(--green-strong); }
.button-quiet:hover { border-color: var(--muted); }
.goal-strip {
  margin-top: 58px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.goal-strip div { display: flex; flex-direction: column; gap: 4px; }
.goal-strip strong { color: var(--green); font: 500 11px var(--mono); }
.goal-strip span { font-size: 12px; color: var(--muted); }

.hero-console { border: 1px solid var(--line); background: var(--surface); box-shadow: var(--shadow); transform: rotate(1.1deg); }
.console-bar, .console-footer {
  min-height: 42px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: .08em;
}
.console-dots { display: flex; gap: 6px; }
.console-dots i { width: 7px; height: 7px; border: 1px solid var(--muted); border-radius: 50%; }
.console-body { min-height: 350px; padding: 28px 24px; font: 12px/1.85 var(--mono); overflow: hidden; }
.console-body p { margin: 0; white-space: nowrap; }
.console-body .gap { margin-top: 20px; }
.console-body .muted { color: var(--muted); }
.console-body .ok, .console-body .accent { color: var(--green); }
.console-body .linux { color: var(--blue); }
.console-body .rtos { color: var(--orange); }
.cursor { display: inline-block; width: 7px; height: 14px; margin-left: 5px; vertical-align: -2px; background: var(--green); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.console-footer { border: 0; border-top: 1px solid var(--line); }
.console-footer .status-dot { width: 5px; height: 5px; margin-right: 5px; }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
}
.metrics article { padding: 35px 28px; display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.metrics article:last-child { border-right: 0; }
.metric-value { font: 500 36px var(--mono); color: var(--green); }
.metric-label { color: var(--muted); font-size: 13px; }

.roadmap, .capstone { padding-block: 120px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 50px; margin-bottom: 48px; }
.section-heading.compact { align-items: flex-start; }
.section-heading h2, .routine h2 { margin: 10px 0 8px; font-size: clamp(32px, 4vw, 50px); line-height: 1.1; letter-spacing: -.045em; }
.section-heading p:not(.eyebrow), .routine-copy > p:last-child { margin: 0; color: var(--muted); }
.progress-card { width: 260px; flex: 0 0 auto; padding: 18px; border: 1px solid var(--line); background: var(--surface); }
.progress-copy { display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
.progress-copy strong { color: var(--green); font: 600 22px var(--mono); }
.progress-track { height: 5px; margin: 12px 0 8px; background: var(--surface-2); overflow: hidden; }
.progress-track span { display: block; height: 100%; width: 0; background: var(--green); transition: width .35s ease; }
.progress-card small { color: var(--muted); font-size: 11px; }

.phase-tabs { display: flex; gap: 4px; margin-bottom: 30px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.phase-tab { padding: 13px 18px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); white-space: nowrap; cursor: pointer; font-size: 13px; }
.phase-tab:hover { color: var(--text); }
.phase-tab.is-active { color: var(--green); border-color: var(--green); }
.week-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.week-card {
  position: relative;
  min-height: 260px;
  padding: 25px 25px 22px 30px;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color .2s, transform .2s;
}
.week-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--phase-color); }
.week-card:hover { border-color: color-mix(in srgb, var(--phase-color) 65%, var(--line)); transform: translateY(-2px); }
.week-card.is-complete { opacity: .68; }
.week-card.is-complete h3 { text-decoration: line-through; text-decoration-color: var(--muted); }
.week-top { display: flex; justify-content: space-between; gap: 20px; }
.week-index { color: var(--phase-color); font: 500 11px var(--mono); letter-spacing: .1em; }
.week-check { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 11px; cursor: pointer; }
.week-check input { width: 17px; height: 17px; accent-color: var(--green); }
.week-card h3 { margin: 12px 0 8px; font-size: 20px; letter-spacing: -.025em; }
.week-focus { margin: 0 0 17px; color: var(--muted); font-size: 13px; }
.task-list { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 20px; }
.task-list span { padding: 4px 8px; border: 1px solid var(--line); color: var(--muted); font: 10px var(--mono); }
.deliverable { margin: auto 0 0; padding-top: 15px; border-top: 1px solid var(--line-soft); font-size: 12px; }
.deliverable strong { display: block; margin-bottom: 4px; color: var(--phase-color); font: 500 10px var(--mono); letter-spacing: .08em; }
.week-guide { display: inline-block; margin-top: 13px; color: var(--phase-color); font: 500 11px var(--mono); }
.week-guide:hover { text-decoration: underline; text-underline-offset: 4px; }

.boot-section { padding-block: 110px; background: var(--surface); border-block: 1px solid var(--line); }
.boot-explorer { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: stretch; }
.boot-flow { display: flex; flex-direction: column; }
.boot-node {
  position: relative;
  width: 100%;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 18px;
  border: 1px solid var(--line);
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.boot-node:not(:last-child) { margin-bottom: 22px; }
.boot-node:not(:last-child)::after { content: "↓"; position: absolute; left: 31px; bottom: -24px; color: var(--muted); }
.boot-node.is-active { border-color: var(--green); background: color-mix(in srgb, var(--green) 7%, transparent); }
.boot-node > span { width: 30px; color: var(--green); font: 500 11px var(--mono); }
.boot-node div { display: flex; flex-direction: column; }
.boot-node strong { font-size: 14px; }
.boot-node small { color: var(--muted); }
.boot-detail { padding: 34px; border: 1px solid var(--line); background: var(--bg); }
.boot-detail .detail-index { color: var(--green); font: 500 12px var(--mono); }
.boot-detail h3 { margin: 13px 0 10px; font-size: 29px; letter-spacing: -.04em; }
.boot-detail > p { color: var(--muted); }
.boot-detail h4 { margin: 28px 0 8px; color: var(--green); font: 500 11px var(--mono); letter-spacing: .08em; }
.boot-detail ul { margin: 0; padding-left: 20px; }
.boot-detail code { color: var(--yellow); font-family: var(--mono); }

.knowledge { padding-block: 120px; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.knowledge-grid a { min-height: 165px; padding: 25px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.knowledge-grid a:hover { background: var(--surface); }
.knowledge-grid .knowledge-featured { grid-column: span 3; min-height: 135px; background: color-mix(in srgb, var(--green) 6%, transparent); }
.knowledge-grid .knowledge-featured strong { font-size: 22px; }
.knowledge-grid span { color: var(--green); font: 500 11px var(--mono); }
.knowledge-grid strong { margin: 25px 0 5px; }
.knowledge-grid small { color: var(--muted); }

.architecture { max-width: 900px; margin: 55px auto 65px; }
.arch-layer { padding: 20px 24px; border: 1px solid var(--line); background: var(--surface); }
.arch-layer > span { display: block; margin-bottom: 5px; color: var(--muted); font: 500 10px var(--mono); letter-spacing: .1em; }
.arch-layer strong { font-size: 15px; }
.arch-layer.hardware { border-color: var(--blue); }
.arch-layer.hypervisor { border-color: var(--green); background: color-mix(in srgb, var(--green) 6%, var(--surface)); }
.arch-arrow { padding: 8px 32px; color: var(--muted); font: 10px var(--mono); }
.arch-arrow.split { display: flex; justify-content: space-between; }
.guest-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.linux-guest { border-color: var(--blue); }
.rtos-guest { border-color: var(--orange); }
.workloads { display: flex; gap: 8px; margin-top: 16px; }
.workloads i { padding: 7px 10px; border: 1px solid var(--line); color: var(--muted); font: normal 10px var(--mono); }
.acceptance-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.acceptance-grid article { padding: 28px 24px; border-right: 1px solid var(--line); }
.acceptance-grid article:last-child { border-right: 0; }
.accept-num { color: var(--green); font: 500 11px var(--mono); }
.acceptance-grid h3 { margin: 12px 0 8px; }
.acceptance-grid p, .footnote { color: var(--muted); font-size: 12px; }
.footnote { margin-top: 20px; }

.routine { padding: 70px 0 120px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; align-items: center; }
.routine-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.routine-steps li { display: grid; grid-template-columns: 50px 1fr; align-items: center; padding: 15px 0; border-bottom: 1px solid var(--line); }
.routine-steps > li > span { color: var(--green); font: 500 11px var(--mono); }
.routine-steps div { display: flex; justify-content: space-between; gap: 20px; }
.routine-steps small { color: var(--muted); }

footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 110px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.footer-inner > div { display: flex; align-items: center; gap: 10px; }
.footer-inner p, .footer-inner a { color: var(--muted); font-size: 12px; }
.footer-inner a:hover { color: var(--green); }

@media (max-width: 900px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 55px; padding-top: 70px; }
  .hero-console { max-width: 650px; transform: none; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .progress-card { width: 100%; }
  .week-list { grid-template-columns: 1fr; }
  .boot-explorer { grid-template-columns: 1fr; }
  .acceptance-grid { grid-template-columns: 1fr 1fr; }
  .knowledge-grid { grid-template-columns: 1fr 1fr; }
  .knowledge-grid .knowledge-featured { grid-column: span 2; }
  .acceptance-grid article:nth-child(2) { border-right: 0; }
  .acceptance-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .routine { grid-template-columns: 1fr; gap: 35px; }
}

@media (max-width: 600px) {
  .section-shell { width: min(100% - 28px, 1180px); }
  .site-header { padding-inline: 14px; }
  .hero { padding-block: 55px; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 15px; }
  .goal-strip { grid-template-columns: 1fr 1fr; }
  .console-body { padding: 20px 13px; font-size: 9px; min-height: 300px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metrics article:nth-child(2) { border-right: 0; }
  .metrics article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .roadmap, .capstone { padding-block: 80px; }
  .knowledge { padding-block: 80px; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .knowledge-grid .knowledge-featured { grid-column: auto; }
  .boot-section { padding-block: 80px; }
  .guest-grid, .acceptance-grid { grid-template-columns: 1fr; }
  .acceptance-grid article { border-right: 0; border-bottom: 1px solid var(--line); }
  .acceptance-grid article:last-child { border-bottom: 0; }
  .arch-arrow.split span { display: none; }
  .routine-steps div { flex-direction: column; gap: 1px; }
  .footer-inner { padding-block: 28px; flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}