* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  color-scheme: light dark;

  --bg: #050505;
  --surface: #0a0a0a;
  --border: #161616;
  --border-light: #262626;
  --text: #e5e5e5;
  --text-muted: #737373;
  --text-dim: #525252;
  --text-ghost: #3b3b3b;
  --mono: "IBM Plex Mono", "SF Mono", "Cascadia Code", monospace;
  --sans: "DM Sans", -apple-system, BlinkMacSystemFont, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --surface: #ffffff;
    --border: #e5e5e5;
    --border-light: #d4d4d4;
    --text: #171717;
    --text-muted: #525252;
    --text-dim: #737373;
    --text-ghost: #a3a3a3;
  }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* nav */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.nav-link-current {
  color: var(--text);
  cursor: default;
}

.nav-logo {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}

.nav-link:hover {
  color: var(--text);
}

.nav-right {
  display: flex;
  gap: 24px;
  align-items: center;
}

a.nav-logo {
  color: var(--text);
  text-decoration: none;
}

/* hero */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 40px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  animation: fadeUp 0.8s ease-out;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.6;
  margin-bottom: 48px;
}

/* install block */
.install {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text);
  max-width: 640px;
  width: 100%;
}

.install .prompt {
  color: var(--text-dim);
}

.install + .install {
  margin-top: 16px;
}

.install-os {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 8px 0 24px;
}

.install-os-link {
  color: var(--text-dim);
  text-decoration: underline;
  text-decoration-color: var(--border-light);
  text-underline-offset: 2px;
}

.install-os-link:hover {
  color: var(--text);
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 12px;
  font-family: var(--mono);
  padding: 4px 8px;
  transition: color 0.15s;
}

.copy-btn:hover {
  color: var(--text);
}

/* terminal */
.terminal-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 40px 120px;
  display: flex;
  justify-content: center;
  animation: fadeUp 0.8s ease-out 0.3s both;
}

.terminal {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 24px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  max-width: 640px;
  width: 100%;
}

.terminal-dots {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-ghost);
}

.terminal .prompt {
  color: var(--text-dim);
}

.terminal .cmd {
  color: var(--text);
}

.terminal .output {
  color: var(--text-muted);
  white-space: pre-line;
  margin-bottom: 8px;
}

.terminal .cursor {
  animation: blink 1s step-end infinite;
}

/* divider */
.divider {
  height: 1px;
  background: var(--border);
}

/* features */
.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 40px;
}

.features-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  justify-content: center;
}

.feature {
  animation: fadeUp 0.6s ease-out both;
  flex: 0 1 300px;
}

.feature h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.feature p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* philosophy */
.philosophy {
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 40px;
  text-align: center;
}

.philosophy-label {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

.philosophy blockquote {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.3;
  max-width: 700px;
  margin: 0 auto 48px;
}

.philosophy p {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-ghost);
}

/* docs — three-column layout: left sidebar, content, right TOC */
.docs-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 32px 80px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 200px;
  gap: 48px;
  align-items: start;
  animation: fadeUp 0.4s ease-out;
}

.docs-sidebar,
.docs-toc {
  position: sticky;
  top: 32px;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  font-size: 14px;
}

.docs-version {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.docs-sidebar-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}

.docs-nav,
.docs-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.docs-nav-link {
  display: block;
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.docs-nav-link:hover {
  color: var(--text);
}

.docs-nav-link.active {
  color: var(--text);
  border-left-color: var(--text);
  font-weight: 500;
}

.docs-toc-list a {
  display: block;
  padding: 4px 0;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.5;
  transition: color 0.15s;
}

.docs-toc-list a:hover {
  color: var(--text);
}

.docs-toc-sub a {
  padding-left: 12px;
  font-size: 12.5px;
}

.docs-main {
  min-width: 0;
}

.docs-main .markdown-body {
  background: transparent !important;
  color: var(--text);
  font-family: var(--sans);
}

.docs-main .markdown-body pre,
.docs-main .markdown-body code {
  font-family: var(--mono);
}

.docs-main .markdown-body pre {
  background: var(--surface) !important;
  border: 1px solid var(--border-light);
}

@media (max-width: 1024px) {
  .docs-shell {
    grid-template-columns: 200px minmax(0, 1fr);
  }
  .docs-toc {
    display: none;
  }
}

/* mobile */
@media (max-width: 640px) {
  .hero {
    padding: 80px 24px 60px;
  }
  .terminal-wrap {
    padding: 24px 24px 80px;
  }
  .features {
    padding: 80px 24px;
  }
  .philosophy {
    padding: 80px 24px;
  }
  .nav {
    padding: 16px 24px;
  }
  .footer {
    padding: 24px;
  }
  .install {
    font-size: 12px;
    padding: 12px;
  }
  .docs-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 24px 20px 60px;
  }
  .docs-sidebar {
    position: static;
    max-height: none;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
  }
}

.prompt::after {
  content: " ";
}