:root {
  color-scheme: dark;
  --bg: #080d14;
  --bg-alt: #0b1119;
  --bg-glow: rgba(85, 214, 190, 0.1);
  --surface: #101722;
  --surface-strong: #151f2d;
  --surface-alpha: rgba(16, 23, 34, 0.82);
  --button-bg: rgba(255, 255, 255, 0.03);
  --header-bg: rgba(8, 13, 20, 0.78);
  --line: #243244;
  --text: #eef4fb;
  --muted: #a7b4c4;
  --accent: #55d6be;
  --accent-strong: #8ee7d7;
  --accent-text: #06100e;
  --warning: #f2c16b;
  --focus: #f2c16b;
  --shadow: rgba(0, 0, 0, 0.32);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f8fb;
  --bg-alt: #eef3f7;
  --bg-glow: rgba(8, 117, 104, 0.11);
  --surface: #ffffff;
  --surface-strong: #edf3f7;
  --surface-alpha: rgba(255, 255, 255, 0.9);
  --button-bg: rgba(8, 117, 104, 0.06);
  --header-bg: rgba(246, 248, 251, 0.82);
  --line: #cfdbe6;
  --text: #17202a;
  --muted: #526272;
  --accent: #087568;
  --accent-strong: #064e46;
  --accent-text: #ffffff;
  --warning: #9a6a11;
  --focus: #9a6a11;
  --shadow: rgba(19, 31, 44, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, var(--bg-glow) 0%, transparent 34%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 48%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

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

a:focus-visible,
button:focus-visible,
main:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

code {
  color: var(--accent-strong);
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  overflow-wrap: anywhere;
}

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100;
  transform: translateY(-160%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 10px 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.site-footer,
main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 16px 0;
  background: var(--header-bg);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  width: 100%;
  min-width: 0;
}

.brand-mark {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid rgba(85, 214, 190, 0.45);
  border-radius: 8px;
  background: rgba(85, 214, 190, 0.1);
  color: var(--accent);
  font-size: 0.8rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.nav-links a,
.button,
.theme-toggle {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
}

.nav-links a {
  padding: 8px 10px;
  color: var(--muted);
  font-size: 0.92rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 10px;
  background: var(--button-bg);
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

.theme-toggle-state {
  min-width: 34px;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--accent);
  padding: 2px 8px;
  font-size: 0.78rem;
  text-align: center;
}

.nav-links a:hover,
.link-grid a:hover,
.button:hover,
.theme-toggle:hover {
  border-color: rgba(85, 214, 190, 0.7);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 28px;
  align-items: end;
  min-height: 620px;
  padding: 84px 0 64px;
}

.hero-content h1,
.section-heading h2,
.split h2,
.coverage-panel h2 {
  margin: 0;
  line-height: 1.08;
}

.hero-content h1 {
  max-width: 850px;
  font-size: 3.6rem;
}

.hero-copy {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 14px;
  background: var(--button-bg);
  font-weight: 700;
}

.button.primary {
  border-color: rgba(85, 214, 190, 0.7);
  background: var(--accent);
  color: var(--accent-text);
}

.status-panel,
.system-diagram article,
.feature-grid article,
.version-grid article,
.checklist,
.command-block,
.coverage-panel,
.link-grid a {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-alpha);
  box-shadow: 0 22px 60px var(--shadow);
}

.status-panel {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.status-panel div {
  padding: 14px;
  border-radius: 8px;
  background: var(--surface-strong);
}

.status-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.status-panel strong {
  display: block;
  margin-top: 6px;
}

.section {
  padding: 64px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2,
.split h2,
.coverage-panel h2 {
  font-size: 2rem;
}

.section-heading p,
.split p,
.coverage-panel p,
.feature-grid p,
.version-grid p {
  color: var(--muted);
}

.system-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
}

.main-flow,
.support-flow {
  display: grid;
  gap: 12px;
}

.main-flow article {
  position: relative;
}

.main-flow article:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 28px;
  bottom: -13px;
  width: 2px;
  height: 13px;
  background: var(--accent);
}

.main-flow span,
.support-flow strong {
  display: block;
  font-weight: 800;
}

.main-flow small,
.support-flow span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.support-flow article {
  border-color: rgba(242, 193, 107, 0.45);
}

.system-diagram article,
.feature-grid article,
.version-grid article {
  padding: 18px;
}

.feature-grid h3,
.version-grid h3 {
  margin: 10px 0 8px;
  font-size: 1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  gap: 28px;
  align-items: center;
}

.version-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.checklist {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.checklist p {
  margin: 0;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--button-bg);
  color: var(--text);
}

.command-block {
  margin: 0;
  overflow-x: auto;
  padding: 22px;
  color: var(--accent-strong);
}

.coverage-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.link-grid a {
  padding: 16px;
  color: var(--text);
  text-decoration: none;
}

.static-note {
  margin-top: 16px;
  color: var(--muted);
}

.guide-main {
  padding-bottom: 72px;
}

.guide-hero {
  padding: 56px 0 34px;
  border-bottom: 1px solid var(--line);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb a,
.guide-content a,
.guide-footer-links a {
  color: var(--accent-strong);
}

.guide-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: 2.75rem;
  line-height: 1.12;
}

.guide-lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.guide-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  padding-top: 36px;
}

.guide-sidebar {
  position: sticky;
  top: 92px;
}

.guide-nav {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-alpha);
  padding: 14px;
}

.guide-nav h2 {
  margin: 2px 8px 10px;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.guide-nav ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-nav a {
  display: flex;
  align-items: center;
  min-height: 40px;
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--muted);
  text-decoration: none;
}

.guide-nav a:hover {
  background: var(--button-bg);
  color: var(--text);
}

.guide-nav a[aria-current="page"] {
  background: var(--surface-strong);
  color: var(--accent-strong);
  font-weight: 800;
}

.guide-content {
  min-width: 0;
  max-width: 820px;
}

.guide-content > section + section {
  margin-top: 48px;
  padding-top: 42px;
  border-top: 1px solid var(--line);
}

.guide-content h2,
.guide-content h3 {
  line-height: 1.25;
}

.guide-content h2 {
  margin: 0 0 16px;
  font-size: 1.75rem;
}

.guide-content h3 {
  margin: 30px 0 10px;
  font-size: 1.12rem;
}

.guide-content p,
.guide-content li {
  color: var(--muted);
}

.guide-content strong {
  color: var(--text);
}

.guide-content ul,
.guide-content ol {
  padding-left: 22px;
}

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

.guide-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.guide-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-alpha);
  padding: 18px;
}

.guide-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.guide-card p {
  margin: 0;
}

.callout {
  margin: 24px 0;
  border-left: 4px solid var(--accent);
  background: var(--button-bg);
  padding: 14px 18px;
}

.callout.warning {
  border-left-color: var(--warning);
}

.callout p {
  margin: 0;
}

.command-set {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}

.command-set .command-block {
  box-shadow: none;
}

.guide-table-wrap {
  max-width: 100%;
  margin: 20px 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: var(--surface-alpha);
}

.guide-table th,
.guide-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.guide-table th {
  color: var(--text);
  font-size: 0.88rem;
}

.guide-table td {
  color: var(--muted);
}

.guide-table tr:last-child td {
  border-bottom: 0;
}

.resource-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.resource-list a {
  display: block;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--button-bg);
  text-decoration: none;
}

.page-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-nav a {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--button-bg);
  text-decoration: none;
}

.page-nav a:last-child {
  text-align: right;
}

.page-nav small {
  display: block;
  color: var(--muted);
}

.page-nav strong {
  display: block;
  margin-top: 3px;
  color: var(--text);
  overflow-wrap: anywhere;
}

.guide-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

kbd {
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 1px 5px;
  font: 0.85em "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 32px 0 48px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .site-header,
  .hero,
  .split,
  .coverage-panel,
  .site-footer {
    display: block;
  }

  .site-header {
    position: static;
  }

  .header-actions {
    align-items: flex-start;
    justify-content: flex-start;
    margin-top: 14px;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    padding-top: 56px;
  }

  .hero-content h1 {
    font-size: 2.4rem;
  }

  .status-panel,
  .version-grid,
  .checklist,
  .command-block,
  .coverage-panel .button {
    margin-top: 20px;
  }

  .system-diagram,
  .feature-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .guide-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .guide-sidebar {
    position: static;
  }

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

  .guide-content {
    max-width: none;
  }
}

@media (max-width: 560px) {
  .site-header,
  .site-footer,
  main {
    width: min(100% - 24px, 1120px);
  }

  html {
    scroll-padding-top: 24px;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .header-actions {
    display: grid;
    gap: 10px;
    justify-content: stretch;
  }

  .nav-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .nav-links a {
    text-align: center;
  }

  .feature-grid,
  .version-grid,
  .link-grid,
  .guide-summary-grid,
  .resource-list,
  .page-nav,
  .guide-nav ul {
    grid-template-columns: 1fr;
  }

  .guide-hero {
    padding-top: 40px;
  }

  .guide-hero h1 {
    font-size: 2rem;
  }

  .page-nav a:last-child {
    text-align: left;
  }

  .button,
  .theme-toggle {
    width: 100%;
  }

  .theme-toggle {
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}