:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --u-bg: #0d0f0d;
  --u-surface: #151815;
  --u-soft: #1c201c;
  --u-text: #f2f3ed;
  --u-muted: #a8ada4;
  --u-line: #2a2f2a;
  --u-line-strong: #3a403a;
  --u-accent: #7792ff;
  --u-accent-strong: #a2b4ff;
  --u-accent-soft: #1b2548;
  --u-success: #69d5a3;
  --u-danger: #ff8f87;
  --u-header: rgba(13, 15, 13, 0.94);
  --u-shadow: 0 22px 60px rgba(0, 0, 0, 0.28);

  --ink: var(--u-bg);
  --ink-soft: var(--u-surface);
  --ink-card: var(--u-soft);
  --paper: var(--u-bg);
  --paper-bright: var(--u-surface);
  --paper-muted: var(--u-soft);
  --text: var(--u-text);
  --text-muted: var(--u-muted);
  --paper-text: var(--u-text);
  --paper-muted-text: var(--u-muted);
  --line-dark: var(--u-line);
  --line-light: var(--u-line);
  --blue: var(--u-accent);
  --blue-strong: var(--u-accent);
  --cyan: var(--u-accent-strong);
  --green: var(--u-success);
  --violet: #aa95ff;
  --amber: #e0aa55;
  --red: var(--u-danger);

  --bg-main: var(--u-bg);
  --bg: var(--u-bg);
  --bg-color: var(--u-bg);
  --bg-panel: var(--u-surface);
  --surface: var(--u-surface);
  --surface-color: var(--u-surface);
  --surface-light: var(--u-soft);
  --surface-hover: #222722;
  --card-bg: var(--u-surface);
  --sidebar-bg: var(--u-surface);
  --glass-bg: var(--u-surface);
  --border: var(--u-line);
  --border-color: var(--u-line);
  --glass-border: var(--u-line);
  --text-main: var(--u-text);
  --primary: var(--u-accent);
  --primary-hover: var(--u-accent-strong);
  --emerald: var(--u-success);
}

html[data-theme="light"] {
  color-scheme: light;
  --u-bg: #f4f4ef;
  --u-surface: #ffffff;
  --u-soft: #ecece6;
  --u-text: #111310;
  --u-muted: #62665f;
  --u-line: #d8d9d1;
  --u-line-strong: #bfc1b8;
  --u-accent: #315cf4;
  --u-accent-strong: #2046cc;
  --u-accent-soft: #e7ecff;
  --u-success: #167a50;
  --u-danger: #c7433c;
  --u-header: rgba(244, 244, 239, 0.94);
  --u-shadow: 0 18px 50px rgba(25, 28, 23, 0.08);

  --ink: var(--u-bg);
  --ink-soft: var(--u-surface);
  --ink-card: var(--u-soft);
  --paper: var(--u-bg);
  --paper-bright: var(--u-surface);
  --paper-muted: var(--u-soft);
  --text: var(--u-text);
  --text-muted: var(--u-muted);
  --paper-text: var(--u-text);
  --paper-muted-text: var(--u-muted);
  --line-dark: var(--u-line);
  --line-light: var(--u-line);
  --blue: var(--u-accent);
  --blue-strong: var(--u-accent);
  --cyan: var(--u-accent-strong);
  --green: var(--u-success);
  --violet: #7657f6;
  --amber: #a86b0a;
  --red: var(--u-danger);

  --bg-main: var(--u-bg);
  --bg: var(--u-bg);
  --bg-color: var(--u-bg);
  --bg-panel: var(--u-surface);
  --surface: var(--u-surface);
  --surface-color: var(--u-surface);
  --surface-light: var(--u-soft);
  --surface-hover: #e4e5de;
  --card-bg: var(--u-surface);
  --sidebar-bg: var(--u-surface);
  --glass-bg: var(--u-surface);
  --border: var(--u-line);
  --border-color: var(--u-line);
  --glass-border: var(--u-line);
  --text-main: var(--u-text);
  --primary: var(--u-accent);
  --primary-hover: var(--u-accent-strong);
  --emerald: var(--u-success);
}

html {
  background: var(--u-bg) !important;
  scroll-behavior: smooth;
  scroll-padding-top: 94px;
}

html body {
  min-width: 320px;
  background: var(--u-bg) !important;
  background-image: none !important;
  color: var(--u-text) !important;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body::before {
  display: none !important;
}

::selection {
  background: var(--u-accent) !important;
  color: #fff !important;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--u-accent) 72%, transparent) !important;
  outline-offset: 4px;
}

a {
  color: inherit;
}

.shell {
  width: min(calc(100% - 40px), 1180px) !important;
}

/* Shared portfolio shell */
.site-header {
  min-height: 74px !important;
  border-bottom: 1px solid var(--u-line) !important;
  background: var(--u-header) !important;
  box-shadow: none !important;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.nav-shell {
  min-height: 74px !important;
  gap: 22px !important;
}

.brand {
  gap: 11px !important;
  color: var(--u-text) !important;
  text-decoration: none !important;
}

.brand-mark {
  width: 38px !important;
  height: 38px !important;
  border: 0 !important;
  border-radius: 11px !important;
  overflow: hidden;
  background: #000 url("/logo.svg") center / cover no-repeat !important;
  color: transparent !important;
  box-shadow: none !important;
  font-size: 12px !important;
  letter-spacing: 0.06em !important;
}

.brand-copy strong {
  color: var(--u-text) !important;
  font-size: 14px !important;
  font-weight: 760 !important;
  letter-spacing: -0.02em;
}

.brand-copy small {
  margin-top: 3px !important;
  color: var(--u-muted) !important;
  font-size: 10px !important;
  font-weight: 560 !important;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  gap: 4px !important;
}

.site-nav > a:not(.button) {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 11px !important;
  border-radius: 10px;
  color: var(--u-muted) !important;
  font-size: 13px !important;
  font-weight: 650 !important;
  text-decoration: none !important;
}

.site-nav > a:not(.button)::after {
  display: none !important;
}

.site-nav > a:not(.button):hover,
.site-nav > a[aria-current="page"] {
  background: var(--u-soft) !important;
  color: var(--u-text) !important;
}

.global-site-actions {
  display: inline-flex;
  align-items: center;
  margin-left: 4px;
}

.theme-toggle {
  width: 42px !important;
  min-width: 42px !important;
  height: 42px !important;
  min-height: 42px !important;
  display: grid !important;
  place-items: center;
  padding: 0 !important;
  border: 1px solid var(--u-line) !important;
  border-radius: 12px !important;
  background: var(--u-surface) !important;
  color: var(--u-text) !important;
  box-shadow: none !important;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--u-line-strong) !important;
  background: var(--u-soft) !important;
  transform: translateY(-1px);
}

.global-action-icon {
  position: relative;
  width: 17px;
  height: 17px;
  display: block;
  overflow: hidden;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.theme-toggle[data-icon="moon"] .global-action-icon {
  box-shadow: inset 5px -3px 0 var(--u-surface);
}

.theme-toggle[data-icon="sun"] .global-action-icon::before,
.theme-toggle[data-icon="sun"] .global-action-icon::after {
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.menu-toggle {
  border-color: var(--u-line) !important;
  background: var(--u-surface) !important;
}

.menu-toggle span {
  background: var(--u-text) !important;
}

/* Editorial subpages */
.subpage-hero {
  padding: clamp(76px, 10vw, 128px) 0 clamp(58px, 8vw, 92px) !important;
  border-bottom: 1px solid var(--u-line) !important;
  background: var(--u-bg) !important;
}

.subpage-hero .shell {
  max-width: 1180px;
}

.breadcrumb {
  margin-bottom: 28px !important;
  color: var(--u-muted) !important;
  font-size: 12px !important;
  font-weight: 650;
}

.breadcrumb a:hover {
  color: var(--u-accent-strong) !important;
}

.section-kicker {
  color: var(--u-accent-strong) !important;
  font-size: 11px !important;
  font-weight: 760 !important;
  letter-spacing: 0.12em !important;
  text-transform: uppercase;
}

.subpage-hero h1 {
  max-width: 960px;
  margin: 13px 0 0 !important;
  color: var(--u-text) !important;
  font-size: clamp(3rem, 7.2vw, 6.5rem) !important;
  font-weight: 750 !important;
  letter-spacing: -0.07em !important;
  line-height: 0.94 !important;
}

.subpage-hero > .shell > p:last-of-type,
.subpage-hero h1 + p {
  max-width: 760px !important;
  margin-top: 25px !important;
  color: var(--u-muted) !important;
  font-size: clamp(1.02rem, 1.7vw, 1.25rem) !important;
  line-height: 1.6;
}

.article-meta {
  margin-top: 28px !important;
}

.article-meta span,
.tag-list li {
  border: 1px solid var(--u-line) !important;
  background: var(--u-soft) !important;
  color: var(--u-muted) !important;
}

.page-section {
  padding: clamp(72px, 9vw, 118px) 0 !important;
  background: var(--u-bg) !important;
}

.page-section-alt {
  border-block: 1px solid var(--u-line) !important;
  background: var(--u-surface) !important;
}

.section-heading h2,
.page-section h2 {
  color: var(--u-text);
}

.section-heading > p,
.section-heading div + p {
  color: var(--u-muted) !important;
}

.lab-card,
.decision-card,
.article-index-card,
.case-card,
.capability-card,
.service-card,
.fact-card,
.toc-card,
.resume-aside,
.status-card {
  border: 1px solid var(--u-line) !important;
  border-radius: 20px !important;
  background: var(--u-surface) !important;
  color: var(--u-text) !important;
  box-shadow: none !important;
}

.lab-card,
.decision-card,
.article-index-card {
  min-height: 280px;
  padding: clamp(24px, 3.4vw, 36px) !important;
}

.lab-card > span,
.decision-card > span,
.article-index-card > span {
  color: var(--u-accent-strong) !important;
  font-size: 10px !important;
  font-weight: 760 !important;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lab-card h2,
.decision-card h3,
.article-index-card h2 {
  color: var(--u-text) !important;
  letter-spacing: -0.035em;
}

.lab-card p,
.decision-card p,
.article-index-card p,
.fact-card p,
.status-card p {
  color: var(--u-muted) !important;
}

.prose {
  color: var(--u-muted) !important;
}

.prose h2,
.prose h3,
.prose h4 {
  color: var(--u-text) !important;
  letter-spacing: -0.035em;
}

.prose a,
.text-link,
.fact-list a {
  color: var(--u-accent-strong) !important;
}

.prose blockquote {
  border-left-color: var(--u-accent) !important;
  background: var(--u-accent-soft) !important;
  color: var(--u-text) !important;
}

.prose pre,
.prose code {
  border-color: var(--u-line) !important;
  background: #0b0e0b !important;
  color: #e8eee8 !important;
}

.fact-list div,
.resume-item,
.timeline-item,
.verification-list li {
  border-color: var(--u-line) !important;
}

.fact-list dt,
.resume-item time {
  color: var(--u-muted) !important;
}

.fact-list dd,
.resume-item h3,
.resume-section h2,
.resume-aside h2 {
  color: var(--u-text) !important;
}

.resume-aside > ul li {
  border-color: var(--u-line) !important;
  background: var(--u-soft) !important;
  color: var(--u-muted) !important;
}

.button,
.btn,
.btn-primary,
.btn-secondary,
.btn-cta,
.btn-audit,
.btn-download,
.start-btn,
.cert-btn,
.sync-btn,
.back-btn,
.time-btn {
  min-height: 44px;
  border: 1px solid var(--u-line) !important;
  border-radius: 12px !important;
  background: var(--u-text) !important;
  color: var(--u-bg) !important;
  box-shadow: none !important;
  font-weight: 720 !important;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 220ms ease !important;
}

.button-secondary,
.btn-secondary,
.btn-outline,
.back-btn,
.time-btn {
  background: transparent !important;
  color: var(--u-text) !important;
}

.button:hover,
.btn:hover,
.btn-primary:hover,
.btn-secondary:hover,
.btn-cta:hover,
.btn-audit:hover,
.btn-download:hover,
.start-btn:hover,
.cert-btn:hover,
.sync-btn:hover,
.back-btn:hover,
.time-btn:hover {
  border-color: var(--u-line-strong) !important;
  filter: none !important;
  box-shadow: none !important;
  transform: translateY(-2px) !important;
}

.site-footer {
  border-top: 1px solid var(--u-line) !important;
  background: var(--u-bg) !important;
  color: var(--u-muted) !important;
}

.footer-bottom a {
  color: var(--u-accent-strong) !important;
}

/* Standalone labs, utilities, and simulations */
.navbar,
.top-nav,
.body-nav,
body > nav,
.header-section,
.tabs-header,
.hud {
  border: 0 !important;
  border-bottom: 1px solid var(--u-line) !important;
  border-radius: 0 !important;
  background: var(--u-header) !important;
  background-image: none !important;
  box-shadow: none !important;
  -webkit-backdrop-filter: blur(14px) !important;
  backdrop-filter: blur(14px) !important;
}

.navbar,
.top-nav,
body > nav {
  min-height: 74px;
  margin: 0 !important;
  padding: 12px max(18px, calc((100% - 1180px) / 2)) !important;
}

.navbar-brand,
.nav-left,
.project-title,
.doc-title,
.title,
.logo {
  color: var(--u-text) !important;
  text-shadow: none !important;
}

.logo {
  min-width: 38px;
  min-height: 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 11px;
  overflow: hidden;
  background: #000 url("/logo.svg") center / cover no-repeat !important;
  color: transparent !important;
  font-size: 0 !important;
  letter-spacing: 0.06em !important;
}

.back-link,
.nav-links a,
.nav-item,
.nav-right a {
  color: var(--u-muted) !important;
}

.back-link:hover,
.nav-links a:hover,
.nav-item:hover,
.nav-item.active {
  background: var(--u-soft) !important;
  color: var(--u-text) !important;
  transform: none !important;
}

.panel,
.palette,
.canvas-area,
.code-panel,
.editor-section,
.results-area,
.wizard-panel,
.score-card,
.output-panel,
.document-page,
.diagram,
.sidebar,
.terminal,
.terminal-window,
.terminal-wrapper,
.terminal-block,
.topo-panel,
.compare-card,
.card,
.chart-card,
.stat-card,
.course-card,
.login-box,
.argo-app,
.node-box,
.resource-tree,
.yaml-diff,
.hcl-panel,
.cost-summary,
.control-group,
.tabs-wrapper,
.scenario-container,
.certificate,
.report,
.action-item,
.breakdown-item,
.topology,
.warning-box,
.demo-notice,
.status-card,
.fact-card {
  border-color: var(--u-line) !important;
  background: var(--u-surface) !important;
  background-image: none !important;
  color: var(--u-text) !important;
  box-shadow: none !important;
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
}

.panel,
.wizard-panel,
.score-card,
.output-panel,
.document-page,
.diagram,
.terminal,
.terminal-window,
.terminal-wrapper,
.topo-panel,
.compare-card,
.card,
.chart-card,
.stat-card,
.course-card,
.argo-app,
.control-group,
.status-card {
  border-radius: 16px !important;
}

.component-item,
.node-props,
.form-control,
.input-group,
.option-label,
.option-btn,
.topology-node,
.check-item,
.checkbox-label,
.resource-graph,
.rules-table,
.graph-row,
.wizard-step,
.quick-btn,
.quick-endpoints,
.metric,
.panel-detail-row,
.action-items,
.verification-list li {
  border-color: var(--u-line) !important;
  background: var(--u-soft) !important;
  box-shadow: none !important;
}

.component-item:hover,
.option-btn:hover,
.option-label:hover,
.quick-btn:hover,
.wizard-step:hover,
.course-card:hover,
.stat-card:hover,
.chart-card:hover {
  border-color: var(--u-line-strong) !important;
  background: var(--u-surface) !important;
  transform: translateY(-2px);
}

.tab-btn,
.code-tab,
.toc-item,
.time-btn {
  border-color: transparent !important;
  border-radius: 10px !important;
  background: transparent !important;
  color: var(--u-muted) !important;
}

.tab-btn:hover,
.tab-btn.active,
.code-tab:hover,
.code-tab.active,
.toc-item:hover,
.toc-item.active,
.time-btn:hover,
.time-btn.active {
  border-color: var(--u-line) !important;
  background: var(--u-soft) !important;
  color: var(--u-text) !important;
  box-shadow: none !important;
}

input,
textarea,
select,
.search-box,
.cert-input {
  border-color: var(--u-line) !important;
  border-radius: 11px !important;
  background: var(--u-bg) !important;
  background-image: none !important;
  color: var(--u-text) !important;
  box-shadow: none !important;
}

input:focus,
textarea:focus,
select:focus,
.search-box:focus,
.cert-input:focus {
  border-color: var(--u-accent) !important;
  outline: 3px solid color-mix(in srgb, var(--u-accent) 14%, transparent) !important;
}

.description,
.subtitle,
.text-muted,
.muted,
.status-legend,
.status-card p,
.verification-list span,
.doc-meta,
.meta,
.document-page p,
.document-page li,
.doc-subtitle,
.sign-text {
  color: var(--u-muted) !important;
}

h1,
h2,
h3,
h4,
h5,
h6,
strong,
.section-title,
.doc-title,
.sign-title,
.sign-name {
  color: var(--u-text) !important;
}

.terminal-body,
.code-content,
.env-output,
.script-output,
.response-panel,
pre,
code {
  background-color: #0b0e0b !important;
  color: #e8eee8 !important;
}

.status-pill,
.status-good,
.pass,
.success {
  border-color: color-mix(in srgb, var(--u-success) 30%, transparent) !important;
  background: color-mix(in srgb, var(--u-success) 11%, transparent) !important;
  color: var(--u-success) !important;
}

@media (hover: hover) and (pointer: fine) {
  .lab-card:hover,
  .decision-card:hover,
  .article-index-card:hover {
    border-color: var(--u-line-strong) !important;
    transform: translateY(-4px);
  }
}

@media (max-width: 840px) {
  .shell {
    width: min(calc(100% - 28px), 1180px) !important;
  }

  .site-header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .brand-copy small {
    display: none !important;
  }

  .site-nav {
    top: 74px !important;
    gap: 5px !important;
    padding: 20px 14px 34px !important;
    border-top: 1px solid var(--u-line) !important;
    background: var(--u-bg) !important;
  }

  .site-nav > a:not(.button),
  .site-nav > .button {
    width: 100%;
    min-height: 54px;
    justify-content: flex-start;
    padding-inline: 16px !important;
    border: 0 !important;
    border-bottom: 1px solid var(--u-line) !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--u-text) !important;
    font-size: 17px !important;
  }

  .site-nav .global-site-actions {
    margin: 12px 0 0;
  }

  .subpage-hero {
    padding-block: 62px 52px !important;
  }

  .subpage-hero h1 {
    font-size: clamp(2.75rem, 13vw, 4.6rem) !important;
  }

  .navbar,
  .top-nav,
  body > nav {
    min-height: 68px;
    padding: 9px 14px !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }

  .navbar > .back-link,
  body > nav > .back-link {
    display: none !important;
  }

  .navbar .title,
  .top-nav .title {
    max-width: 48vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@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;
  }
}