html,
body {
  height: 100%;
}

html {
  font-size: 15px;
}

:root {
  --color-bg: #040404;
  --color-panel: #111111;
  --color-panel-strong: #1d1d1d;
  --color-panel-alt: #1a1a1a;
  --color-border: #292929;
  --color-border-strong: #3a3a3a;
  --color-text: #B0B0B0;
  --color-text-muted: #636363;
  --color-highlight: #9458A3;
  --color-chip-bg: #1d1d1d;
  --color-chip-border: #3d3d3d;
  --color-link: #cfc6ff;
  --color-heading: #dfdfdf;
  --color-hero-title: var(--color-heading);
  --color-code-text: #e9e9e9;
  --token-comment: #6c7394;
  --token-punctuation: #c3c8ff;
  --token-property: #ffb86c;
  --token-number: #ff6cf6;
  --token-string: #8bf8d8;
  --token-operator: #fef0a5;
  --token-atrule: #9eb0ff;
  --token-keyword: #db8bff;
  --token-regex: #ffc8dd;
  --color-section-strong: #DEDEDE;
  --color-tav-strong: #2f2f2f;
  --color-sidebar-hover: #373737;

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 4rem;

  --radius-md: 0.5rem;
  --radius-sm: 0.25rem;
  --radius-lg: var(--radius-md);
  --radius-pill: 9999px;

  --header-height: 72px;
  --sidebar-width: 16rem;
  --toc-width: 16rem;
  --content-max: 55rem;
  --column-gap: 4rem;
  --shell-padding: var(--space-xl);
  --shell-padding-block: var(--space-md);
  --layout-max: calc(var(--sidebar-width) + var(--content-max) + var(--toc-width) + (var(--column-gap) * 2) + (var(--shell-padding) * 2));
  --rail-offset: calc((100vw - min(100vw, var(--layout-max))) / 2 + var(--shell-padding));
  --rail-top-offset: calc(var(--header-height) + var(--shell-padding-block));
  --rail-height: calc(100vh - var(--header-height) - (var(--shell-padding-block) * 2));

  --font-base: "Plus Jakarta Sans", "Zen Kaku Gothic New", "Hiragino Sans", system-ui, sans-serif;
  --transition-fast: all 100ms cubic-bezier(0.2, 0.91, 0.85, 0.96) 0s;
}

:root[data-theme="light"] {
  --color-bg: #f1f1f1;
  --color-panel: #d9d9d9;
  --color-panel-alt: #d9d9d9;
  --color-border: #d8d8e0;
  --color-border-strong: #bebec7;
  --color-text: #181818;
  --color-text-muted: #51515a;
  --color-chip-bg: #ffffff;
  --color-chip-border: #d8d8e0;
  --color-heading: #222222;
  --color-hero-title: var(--color-bg);
  --color-code-text: #1f2430;
  --token-comment: #6e7781;
  --token-punctuation: #5b6476;
  --token-property: #c8551d;
  --token-number: #7b2cbf;
  --token-string: #1f7a3e;
  --token-operator: #7a5f00;
  --token-atrule: #2f6fda;
  --token-keyword: #af52de;
  --token-regex: #c02c5a;
  --color-panel-strong: #d9d9d9;
  --color-section-strong: #2f2f2f;
  --color-tav-strong: #f1f1f1;
  --color-sidebar-hover: var(--color-tav-strong);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  min-height: 100%;
  padding-top: var(--header-height);
  overflow-y: scroll;
  scrollbar-gutter: stable both-edges;
}

button {
  font: inherit;
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
  background: var(--color-panel-alt);
  filter: brightness(0.85);
}

.article-body img {
  display: block;
  width: 100%;
  height: auto;
}

.article-media__image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  max-width: 100%;
  max-height: 100%;
  transition: opacity 0.3s ease;
  cursor: zoom-in;
  filter: brightness(0.85);
  border-radius: calc(var(--radius-md) - 2px);
}

.article-media__image[data-loaded="true"] {
  opacity: 1;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  background: var(--color-bg);
}

.site-header__inner {
  height: var(--header-height);
  max-width: var(--layout-max);
  margin: 0 auto;
  padding: 0 var(--shell-padding);
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-max)) var(--toc-width);
  align-items: center;
  gap: var(--space-xl);
}

.site-header__logo,
.site-header__search,
.site-header__actions {
  justify-self: center;
  width: 100%;
}

.site-header__search {
  display: flex;
  justify-content: center;
  position: relative;
  width: max(calc(100% - 10rem), 400px);
}

.site-header__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  height: 100%;
}

.site-header__logo-mark {
  position: relative;
  width: 83%;
  max-width: 320px;
  aspect-ratio: 800 / 94;
  display: block;
}

.site-header__logo-layer {
  position: absolute;
  inset: 0;
  display: block;
  background: var(--logo-color, var(--color-heading));
  -webkit-mask: var(--logo-mask) no-repeat center / contain;
  mask: var(--logo-mask) no-repeat center / contain;
}

.site-header__logo-layer--base {
  --logo-color: var(--color-heading);
}

.site-header__logo-layer--text {
  --logo-color: var(--color-text);
}

.search-box {
  width: 100%;
  max-width: none;
  position: relative;
}

.search-box__input {
  width: 100%;
  height: 35px;
  border-radius: var(--radius-md);
  background: var(--color-panel-strong);
  color: var(--color-text);
  padding: 0 var(--space-lg);
  border: none;
  font-weight: 600;
}

.search-box__results {
  position: absolute;
  top: calc(100% + var(--space-xs));
  left: 0;
  right: 0;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  z-index: 3;
  max-height: 24rem;
  overflow-y: auto;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.search-box__results[hidden] {
  display: none;
}

.search-result {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  text-decoration: none;
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--color-text);
  outline: none;
}

.search-result:hover,
.search-result:focus-visible {
  border-color: var(--color-border-strong);
  background: var(--color-panel-alt);
}

.search-result.is-active {
  border-color: var(--color-border-strong);
  background: var(--color-panel-alt);
}

.search-result__title {
  font-weight: 600;
}

.search-result__summary {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.search-result__meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.highlight {
  background: rgba(255, 255, 0, 0.35);
  color: var(--color-text);
  padding: 0 0.1rem;
  border-radius: var(--radius-md);
}

.site-header__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-max)) var(--toc-width);
  gap: var(--column-gap);
  padding: var(--shell-padding-block) var(--shell-padding);
  margin: 0 auto;
  max-width: var(--layout-max);
  width: 100%;
  position: relative;
  min-height: 100vh;
}

.app-shell__content {
  min-width: 0;
  width: 100%;
}

/* Page fade-in (now driven by View Transitions; keep simple opacity guard) */
.transition-fade {
  opacity: 1;
  transition: opacity 200ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
  .transition-fade {
    transition: none !important;
  }
}

.sidebar {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  gap: var(--space-md);
  height: 100%;
  min-height: 0;
}

.sidebar__sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  background: var(--color-panel-strong);
  border-radius: var(--radius-md);
  padding: var(--space-xs) 0;
}

.sidebar__section-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-panel-strong);
  border-radius: var(--radius-md);
  min-height: 0;
}



.sidebar__nav-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) 0 var(--space-sm) var(--space-sm);
  min-height: 0;

  &::-webkit-scrollbar {
    display: none;
  }
}

.sidebar__section-tabs {
  display: flex;
  gap: var(--space-2xs);
}

.sidebar__section-tab {
  flex: 1;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: var(--space-xs) 0 var(--space-2xs) 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.sidebar__section-tab:hover,
.sidebar__section-tab:focus-visible {
  color: var(--color-text);
}

.sidebar__section-tab.is-active {
  background: var(--color-panel-strong);
  color: var(--color-highlight);
}

.sidebar__section-tab-icon .icon {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  --icon-stroke-width: 1.8px;
  display: block;
  transition: var(--transition-fast);
}

.sidebar__section-tab:not(.is-active) .sidebar__section-tab-icon .icon {
  color: #4A4A4A;
}

.sidebar__section-tab.is-active .sidebar__section-tab-icon .icon {
  color: var(--color-highlight);
}

.sidebar__section-tab:not(.is-active):hover .sidebar__section-tab-icon .icon,
.sidebar__section-tab:not(.is-active):focus-visible .sidebar__section-tab-icon .icon {
  color: var(--color-text);
}

@supports selector(:has(*)) {

  /* 背景色：ボタンのみ */
  .sidebar:has(.sidebar__section-tab[data-section-tab="begin-with"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="begin-with"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="data-utilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="data-utilities"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="ai-capabilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="ai-capabilities"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="basic-workflows"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="basic-workflows"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="faq"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="faq"]:not(.is-active) {
    background: var(--color-sidebar-hover);
  }

  /* 文字色：ボタン本体 + その中のアイコン */
  .sidebar:has(.sidebar__section-tab[data-section-tab="begin-with"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="begin-with"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="begin-with"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="begin-with"]:not(.is-active) .sidebar__section-icon,

  .sidebar:has(.sidebar__section-tab[data-section-tab="data-utilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="data-utilities"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="data-utilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="data-utilities"]:not(.is-active) .sidebar__section-icon,

  .sidebar:has(.sidebar__section-tab[data-section-tab="ai-capabilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="ai-capabilities"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="ai-capabilities"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="ai-capabilities"]:not(.is-active) .sidebar__section-icon,

  .sidebar:has(.sidebar__section-tab[data-section-tab="basic-workflows"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="basic-workflows"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="basic-workflows"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="basic-workflows"]:not(.is-active) .sidebar__section-icon,

  .sidebar:has(.sidebar__section-tab[data-section-tab="faq"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="faq"]:not(.is-active),
  .sidebar:has(.sidebar__section-tab[data-section-tab="faq"]:is(:hover, :focus-visible)) .sidebar__section-btn[data-section-key="faq"]:not(.is-active) .sidebar__section-icon {
    color: var(--color-text);
  }
}


.rail {
  position: fixed;
  top: var(--rail-top-offset);
  height: var(--rail-height);
  will-change: transform;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
}

.rail--toc {
  width: var(--toc-width);
  right: var(--rail-offset);
}

@media (max-width: 1400px) {
  .app-shell {
    grid-template-columns: var(--sidebar-width) 1fr;
    gap: var(--space-xl);
  }

  .app-shell__toc,
  .rail--toc {
    display: none;
  }
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-md);
  }

  .rail {
    position: static;
    height: auto;
    width: 100%;
    top: auto;
  }

  .app-shell__sidebar {
    position: static;
    width: 100%;
    height: auto;
    overflow: visible;
    margin: 0;
  }

  .app-shell__toc {
    display: none;
    position: static;
    height: auto;
    overflow: visible;
    padding: 0;
  }
}

.sidebar__section-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) 0.9rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: var(--transition-fast);
}

.sidebar__section-btn:not(.is-active):hover,
.sidebar__section-btn:not(.is-active):focus-visible {
  background: var(--color-sidebar-hover);
  color: var(--color-text);
}


.sidebar__section-btn.is-active {
  background: var(--color-section-strong);
  color: var(--color-panel-strong);
}

.sidebar__section-btn.is-active:hover,
.sidebar__section-btn.is-active:focus-visible {
  background: var(--color-section-strong);
  color: var(--color-panel-strong);
}

.sidebar__section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #4A4A4A;
  transition: var(--transition-fast);
}

.sidebar__section-btn.is-active .sidebar__section-icon {
  color: #9357A3;
}


.sidebar__section-btn:not(.is-active):hover .sidebar__section-icon,
.sidebar__section-btn:not(.is-active):focus-visible .sidebar__section-icon {
  color: var(--color-text);
}

.sidebar__section-icon .icon {
  inline-size: 1.3rem;
  block-size: 1.3rem;
  --icon-stroke-width: 2.2px;
}

.sidebar__section-label {
  flex: 1;
  text-align: left;
  font-size: 0.85rem;
}

.sidebar__nav-panel {
  display: none;
}

.sidebar__nav-panel.is-active {
  display: block;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding-left: 0;
  display: flex;
  flex-direction: column;

  .nav-list__item {
    display: flex;
    flex-direction: column;
  }
}

.nav-list__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-xs);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  position: relative;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 100ms cubic-bezier(0.2, 0.91, 0.85, 0.96) 0s;
}


.nav-list__link.is-active {
  background: var(--color-tav-strong);
  color: var(--color-heading);
}

.nav-list__link:hover {
  background: var(--color-tav-strong);
}

.nav-list__link.is-active::before {
  background: var(--color-highlight);
}

.nav-list__children {
  margin-left: var(--space-sm);
  padding-left: var(--space-xs);
  border-left: 1px solid var(--color-border-strong);
}

.nav-list__no-link {
  display: block;
  padding: var(--space-xs) var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-top: var(--space-xs);
}

/* Height-responsive (three-step) */
@media (max-height: 1080px) {
  .sidebar__sections {
    gap: var(--space-2xs);
  }

  .sidebar__section-btn {
    padding: var(--space-xs) 0.9rem;
  }

  .nav-list__no-link {
    margin-top: 0;
  }
}

@media (max-height: 720px) {
  .sidebar__sections {
    display: none;
  }
}

.sidebar__footer {
  padding: var(--space-xs) var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  background: var(--color-panel-strong);
  border-radius: var(--radius-md);
  margin-top: auto;
  font-weight: 500;
  font-size: 0.8rem;
}

.sidebar__about {
  display: flex;
}

.sidebar__about a {
  color: var(--color-text);
  text-decoration: none;
  /** span:not(.sidebar__footer-icon) {
    padding-left: 0.2rem;
  } **/
}

.sidebar__about-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  line-height: 1;
}

.sidebar__footer-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.sidebar__footer-icon .icon {
  inline-size: 1.2rem;
  block-size: 1.2rem;
  --icon-stroke-width: 1.6;
}

.sidebar__lang-label {}

.sidebar__lang-caret {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
}

.sidebar__lang-caret .icon {
  inline-size: 0.95rem;
  block-size: 0.95rem;
}

.sidebar__controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar__lang {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  position: relative;
}

.chip {
  border: 1px solid var(--color-chip-border);
  border-radius: var(--radius-md);
  background: var(--color-chip-bg);
  color: var(--color-text-muted);
  padding: 0.15rem 0.75rem;
  font-size: 0.75rem;
}


.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  cursor: pointer;
  border: none;
  background: transparent;
  padding: 0;
  transition: var(--transition-fast);
}

.theme-toggle__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.45;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

.theme-toggle__icon .icon {
  inline-size: 1rem;
  block-size: 1rem;
}

.theme-toggle[data-theme="dark"] [data-theme-icon="moon"],
.theme-toggle:not([data-theme]) [data-theme-icon="moon"] {
  opacity: 1;
  color: var(--color-highlight);
}

.theme-toggle[data-theme="light"] [data-theme-icon="sun"] {
  opacity: 1;
  color: var(--color-highlight);
}

.theme-toggle:hover .theme-toggle__icon {
  opacity: 0.7;
}

.theme-toggle__icon+.theme-toggle__icon {
  margin-left: var(--space-2xs);
}

.chip--active {
  color: var(--color-text);
  border-color: var(--color-highlight);
}

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

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--color-text);
  padding: 0;
  font: inherit;
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
  color: var(--color-text);
}

.lang-toggle:hover .sidebar__lang-caret,
.lang-toggle:focus-visible .sidebar__lang-caret {
  color: var(--color-text);
}

.lang-menu {
  position: absolute;
  bottom: calc(100% + 0.25rem);
  left: 0;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2xs) 0;
  display: none;
  min-width: 120px;
  z-index: 10;
}

.lang-menu.is-open {
  display: block;
}

.lang-menu a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  text-decoration: none;
  color: var(--color-text-muted);
}

.lang-menu a.is-active,
.lang-menu a:hover {
  color: var(--color-text);
  background: var(--color-panel-alt);
}

.icon-button {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.icon-button--ghost {
  border-color: transparent;
}

.icon {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  display: inline-flex;
  flex-shrink: 0;
}


.hero {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 12rem;
  background: var(--color-panel-alt);
  margin-bottom: var(--space-lg);
}

.hero__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__scrim {
  position: absolute;
  inset: 0;
  background: lab(0 0 0 / 0.3);

  &[data-theme="light"] {
    background: lab(100 0 0 / 0.3);
  }
}

.hero__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-xl);
  text-align: center;
  gap: var(--space-sm);
}

.hero__title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin: 0;
  color: var(--color-hero-title, var(--color-heading));
}


.article-body h1,
.article-body h2,
.article-body h3 {
  color: var(--color-heading);
}

.tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--color-chip-bg);
  border-radius: 200px;
  padding: 0.2rem 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-heading);
  text-decoration: none;
  font-weight: 600;

  &::before {
    content: "#";
    color: var(--color-highlight);
  }
}

.article-body {
  padding-bottom: var(--space-2xl);
  font-weight: 500;
  letter-spacing: 0.04rem;
  line-height: 1.5;
}

.article-body strong {
  color: var(--color-heading);
}

.article-body hr {
  border: 1px solid var(--color-border);
  margin: var(--space-2xl) 0;
}

h1 {
  font-weight: 700;
}

.article-body h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-lg);
  font-size: 1.7rem;
  font-weight: 700;
  scroll-margin-top: calc(var(--header-height) + var(--space-lg));
  letter-spacing: 0;
  margin-left: -0.2rem;
}

.article-body h3 {
  margin: 0;
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xs);
  font-size: 1.2rem;
  font-weight: 700;
  scroll-margin-top: calc(var(--header-height) + var(--space-lg));
  letter-spacing: 0;
}

.article-body p,
.article-body ul,
.article-body ol {
  max-width: 100%;
  color: var(--color-text);
}

.article-body {
  --article-list-icon-size: 0.9rem;
}

.article-body a {
  color: inherit;
  text-decoration-color: currentColor;
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
  text-decoration-skip-ink: auto;
  font-weight: 500;
  transition: text-decoration-thickness var(--transition-fast), color var(--transition-fast);
}

.article-body a:hover,
.article-body a:focus-visible {
  text-decoration-thickness: 0.14em;
}

.article-body a:focus-visible {
  outline: 2px solid var(--color-highlight);
  outline-offset: 0.2rem;
  text-decoration-thickness: 0.16em;
}

.article-body a.link--internal {
    color: var(--color-heading);
    font-weight: 700;
}

.article-body a.link--external {
  color: var(--color-heading);
  font-weight: 700;
}

.article-link__icon {
  display: inline-flex;
  align-items: center;
  margin-inline-start: 0.2rem;
  line-height: 1;
  vertical-align: -0.15em;
}

.article-link__icon .icon {
  inline-size: 0.9rem;
  block-size: 0.9rem;
  --icon-stroke-width: 2.4px;
  display: block;
}

.article-body ul {
  list-style: none;
  margin: var(--space-2xs) 0;
  padding-left: 0;
}

.article-body ul li {
  position: relative;
  padding-left: calc(var(--space-2xs) + var(--article-list-icon-size));
  margin-bottom: var(--space-2xs);
  --article-list-line-height: 1.6em;
  line-height: var(--article-list-line-height, 1.6);
}

.article-body__list-icon {
  position: absolute;
  left: 0;
  top: calc(var(--article-list-line-height, 1.6em) / 2);
  inline-size: var(--article-list-icon-size);
  block-size: var(--article-list-icon-size);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  pointer-events: none;
  --article-list-icon-stroke: 2.2;
  transform: translateY(-50%);
}

.article-body__list-icon-svg {
  inline-size: 100%;
  block-size: 100%;
  stroke: currentColor;
  fill: none;
}

.article-body__list-icon-svg path {
  stroke-width: var(--article-list-icon-stroke, 2.2);
}

.article-body ul ul {
  margin-left: var(--space-2xs);
}

.article-body ol {
  margin: var(--space-2xs) 0;
  padding-left: calc(var(--space-2xs) + var(--article-list-icon-size));
  list-style: decimal;
}

.article-body ol li {
  margin-bottom: var(--space-2xs);
  padding-left: 0;
}

.article-body li>p {
  margin: 0 0 var(--space-2xs);
}

.article-body li>p:last-child {
  margin-bottom: 0;
}

.article-media {
  margin: var(--space-md) 0;
  display: block;
}

.article-media-row {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-md);
  overflow: hidden;
  margin: var(--space-md) 0;
}

.article-media-row .article-media {
  margin: 0;
}

.article-media__frame {
  width: min(100%,
      var(--article-media-width, 720px),
      calc(var(--article-media-aspect, 16 / 9) * min(var(--article-media-height, 300px), 300px)));
  max-width: 100%;
  max-height: min(var(--article-media-height, 300px), 300px);
  min-height: min(var(--article-media-height, 300px), 300px);
  aspect-ratio: var(--article-media-aspect, 16 / 9);
  height: auto;
  border-radius: var(--radius-md);
  background: var(--color-panel-alt);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.article-media-row .article-media__frame {
  width: calc(min(var(--article-media-width, 720px),
          calc(var(--article-media-aspect, 16 / 9) * min(var(--article-media-height, 300px), 300px)))
        * var(--media-scale, 1));
  max-width: 100%;
  height: calc(min(var(--article-media-height, 300px), 300px) * var(--media-scale, 1));
  min-height: 0;
  max-height: none;
}

.article-media-row .article-media__image {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.article-body table {
  width: 100%;
  margin: var(--space-md) 0;
  border-collapse: collapse;
  border-spacing: 0;
  background: var(--color-panel);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-body table th,
.article-body table td {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
}

.article-body table thead {
  background: var(--color-panel-alt);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
}

.article-body table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.article-body table tbody tr+tr td {
  border-top: 1px solid var(--color-border);
}

.article-body pre {
  margin: var(--space-md) 0;
  padding: calc(var(--space-md) + 0.4rem) var(--space-md) var(--space-md) var(--space-md);
  background: var(--color-panel-strong);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.6;
  position: relative;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  color: var(--color-code-text, var(--color-text));
}

.article-body code {
  font-family: ui-monospace, "JetBrains Mono", SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--color-chip-border);
  padding: 0.1rem var(--space-xs);
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--color-code-text, var(--color-text));
}

.article-body pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.article-body blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-2xs) var(--space-lg);
  background: var(--color-panel);
  border-left: 3px solid var(--color-highlight);
  color: var(--color-text);
  font-style: italic;
}

.article-video {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.article-video__frame {
  width: min(100%,
      var(--article-video-width, 720px),
      calc(var(--article-video-aspect, 16 / 9) * var(--article-video-height, 360px)));
  max-width: 100%;
  aspect-ratio: var(--article-video-aspect, 16 / 9);
  max-height: var(--article-video-height, 360px);
  height: auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  position: relative;
}

.article-video video,
.article-video iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: inherit;
}

.article-video video {
  object-fit: cover;
}

.article-video figcaption {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.article-video--gyazo {
  position: relative;
}

.gyazo-toggle {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--color-panel);
  color: var(--color-text);
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.6rem;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  border: none;
}

.article-video--gyazo .article-video__frame:hover .gyazo-toggle,
.article-video--gyazo .article-video__frame:focus-within .gyazo-toggle,
.gyazo-toggle:focus-visible {
  opacity: 1;
  visibility: visible;
}

.gyazo-toggle__pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-pill);
  transition: var(--transition-fast);
}

.gyazo-toggle__knob {
  inline-size: 0.7rem;
  block-size: 0.7rem;
  border-radius: 999px;
  background: currentColor;
  transition: var(--transition-fast);
}

.gyazo-toggle__text {
  font-size: 0.75rem;
  line-height: 1;
}

.gyazo-toggle[data-state="player"] {
  color: var(--color-highlight);
}

.gyazo-toggle[data-state="player"] .gyazo-toggle__knob {
  transform: translateX(2px);
}

.code-copy {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text);
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
}

.code-block {
  position: relative;
  overflow: visible;
}

.code-copy__icon {
  display: inline-flex;
}

.code-copy__icon svg {
  inline-size: 0.9rem;
  block-size: 0.9rem;
}

.code-copy:hover,
.code-copy:focus-visible {
  color: var(--color-highlight);
}

.code-copy.is-copied {
  color: var(--color-highlight);
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: var(--token-comment);
}

.token.punctuation {
  color: var(--token-punctuation);
}

.token.property,
.token.tag,
.token.constant,
.token.symbol,
.token.deleted {
  color: var(--token-property);
}

.token.boolean,
.token.number {
  color: var(--token-number);
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: var(--token-string);
}

.token.operator,
.token.entity,
.token.url,
.token.variable {
  color: var(--token-operator);
}

.token.atrule,
.token.attr-value,
.token.function,
.token.class-name {
  color: var(--token-atrule);
}

.token.keyword {
  color: var(--token-keyword);
}

.token.regex,
.token.important {
  color: var(--token-regex);
}

.token.bold {
  font-weight: 700;
}

.token.italic {
  font-style: italic;
}

.workflow-rail {
  margin-top: var(--space-2xl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.workflow-card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.workflow-card__media {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: brightness(0.85);
}

.workflow-card__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.workflow-card__title {
  font-weight: 500;
}

.workflow-card__actions {
  display: flex;
  gap: var(--space-xs);
  justify-content: flex-end;
}

.article-footer {
  margin-top: var(--space-2xl);
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
}

.article-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-xl) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.article-footer__logo {
  width: 83%;
  max-width: 320px;
  aspect-ratio: 800 / 94;
  position: relative;
}

.article-footer__logo-mark,
.article-footer__logo-layer {
  position: absolute;
  inset: 0;
  display: block;
}

.article-footer__logo-mark {
  position: relative;
  width: 100%;
  height: 100%;
}

.article-footer__logo-layer {
  background: var(--logo-color, var(--color-heading));
  -webkit-mask: var(--logo-mask) no-repeat center / contain;
  mask: var(--logo-mask) no-repeat center / contain;
}

.article-footer__logo-layer--base {
  --logo-color: var(--color-heading);
  --logo-mask: var(--footer-logo-base);
}

.article-footer__logo-layer--text {
  --logo-color: var(--color-text);
}

.article-footer__logo-layer--en {
  --logo-mask: var(--footer-logo-en);
}

.article-footer__logo-layer--ja {
  --logo-mask: var(--footer-logo-ja);
}

.article-footer__links {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  font-size: 0.85rem;
}

.article-footer__link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text);
  gap: var(--space-2xs);
}

.article-footer__link-icon .icon {
  inline-size: 1rem;
  block-size: 1rem;
  --icon-stroke-width: 1.6px;
}

.article-footer__link:hover,
.article-footer__link:focus-visible {
  text-decoration: underline;
}


.workflow-json {
  margin: var(--space-md) 0;
}

.workflow-json__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.workflow-json__row {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  border-radius: var(--radius-md);
  padding: 0 1.25rem;
  background: var(--color-panel-strong);
  align-self: start;
}

.workflow-json__filename {
  font-weight: 500;
}

.workflow-json__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
}

.workflow-json__icon {
  width: 2rem;
  height: 2rem;
  border: none;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  position: relative;
  border-radius: var(--radius-pill);
  transition: var(--transition-fast);
  font-family: var(--font-base);
}

.workflow-json__icon:hover,
.workflow-json__icon:focus-visible {
  color: var(--color-highlight);
}

.workflow-json__icon.is-success {
  color: var(--color-highlight);
}

.workflow-json__icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.workflow-json__icon::after,
.code-copy::after {
  content: attr(data-label);
  position: absolute;
  bottom: calc(100% + var(--space-xs));
  left: 50%;
  transform: translateX(-50%);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-pill);
  font-size: 0.65rem;
  font-weight: 600;
  line-height: 1;
  background: var(--color-highlight);
  color: var(--color-section-strong);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  transition: var(--transition-fast);
  font-family: var(--font-base);
  z-index: 2;
}

.workflow-json__icon:hover::after,
.workflow-json__icon:focus-visible::after,
.code-copy:hover::after,
.code-copy:focus-visible::after {
  opacity: 1;
}

.workflow-json__icon.is-success::after,
.code-copy.is-copied::after {
  opacity: 0;
}

.workflow-json__icon::before,
.code-copy::before {
  content: attr(data-success-label);
  position: absolute;
  bottom: calc(100% + var(--space-xs));
  left: 50%;
  transform: translateX(-50%);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-pill);
  font-size: 0.65rem;
  font-weight: 600;
  line-height: 1;
  background: var(--color-highlight);
  color: var(--color-section-strong);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  font-family: var(--font-base);
  z-index: 3;
  transition: var(--transition-fast);
}

.workflow-json__icon.is-success::before,
.code-copy.is-copied::before {
  opacity: 1;
}

.workflow-related {
  margin-top: var(--space-2xl);
}

.workflow-related__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(146px, 1fr));
  gap: var(--space-sm);
}

.workflow-related__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-panel);
}

.workflow-related__title {
  font-weight: 500;
}

.workflow-related__summary {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

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

.placeholder {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
}

.right-rail {
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  height: 100%;
  min-height: 0;
}

.right-rail__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.right-rail__section--toc {
  flex: 1;
  min-height: 0;
}

.right-rail__section--tips {
  margin-top: auto;
}

.toc {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1;
  min-height: 0;
}

.toc__rail {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 0.25rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.toc__rail::-webkit-scrollbar {
  display: none;
}

.toc__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  border-left: 1px solid var(--color-border);
  }

.toc__link {
  display: block;
  color: var(--color-text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  padding: var(--space-2xs) 0;
  padding-left: calc(var(--space-sm) - 1px);
  font-weight: 600;
  transition: all 100ms cubic-bezier(0.2, 0.91, 0.85, 0.96) 0s;
}

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

.toc__link[data-depth="3"] {
  padding-left: calc(var(--space-sm) * 3 - 1px);
}

.toc__link.is-active {
  color: var(--color-heading);
  border-left-color: var(--color-highlight);
}

.right-rail__tips {
  width: 100%;
}

.assistant-rail {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 35;
  --assistant-rail-transition-duration: 500ms;
  --assistant-rail-transition-timing: cubic-bezier(0.3, 0, 0.3, 1);
  --assistant-panel-collapse-delay: 1000ms;
  --assistant-rail-transition-out-duration: 500ms;
  --assistant-rail-transition-out-timing: cubic-bezier(0.7, 0, 0.7, 1);
}

.assistant-rail__panel,
.assistant-rail__window {
  position: absolute;
  width: 100%;
  transition: opacity var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
    transform var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
    visibility var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing);
}

.assistant-rail[data-placement="above"] .assistant-rail__panel,
.assistant-rail[data-placement="above"] .assistant-rail__window {
  top: 0;
  transform: translateY(calc(-100% - var(--space-md)));
}

.assistant-rail[data-placement="below"] .assistant-rail__panel,
.assistant-rail[data-placement="below"] .assistant-rail__window {
  top: 100%;
  transform: translateY(var(--space-md));
}

.assistant-rail__avatar {
  --assistant-question-size: 20rem;
  --assistant-question-x: 9%;
  --assistant-question-y: 9%;
  --assistant-vivi-size: 20rem;
  --assistant-vivi-x: 11%;
  --assistant-vivi-y: 8%;
  width: 100%;
  height: 90px;
  border-radius: var(--radius-md);
  border: none;
  background-color: var(--color-panel-strong);
  cursor: pointer;
  padding: 0;
  position: relative;
  overflow: hidden;
  filter: brightness(0.8);
  transition: height var(--assistant-rail-transition-out-duration) var(--assistant-rail-transition-out-timing) var(--assistant-panel-collapse-delay);
}

[data-theme="light"] .assistant-rail__avatar {
  filter: brightness(1.0);
}

.assistant-rail[data-expanded="true"] {
  .assistant-rail__avatar {
    height: 180px;
    --assistant-question-y: -4%;
    --assistant-vivi-y: -2%;
    --assistant-vivi-size: 16rem;
    transition: height var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing) 0ms;

    &::before,
    &::after {
      transition:
        transform var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
        width var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
        height var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing);
      transition-delay: 0ms;
    }
  }
}

.assistant-rail__avatar::before,
.assistant-rail__avatar::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  background-repeat: no-repeat;
  background-size: contain;
  pointer-events: none;
  transition:
    transform var(--assistant-rail-transition-out-duration) var(--assistant-rail-transition-out-timing),
    width var(--assistant-rail-transition-out-duration) var(--assistant-rail-transition-out-timing),
    height var(--assistant-rail-transition-out-duration) var(--assistant-rail-transition-out-timing);
  transition-delay: var(--assistant-panel-collapse-delay);
}

.assistant-rail__avatar::before {
  background-image: var(--assistant-question-art, none);
  background-position: center;
  transform-origin: center;
  width: var(--assistant-question-size);
  height: var(--assistant-question-size);
  transform: translate(-50%, -50%) translate(var(--assistant-question-x), var(--assistant-question-y));
}

.assistant-rail__avatar::after {
  background-image: var(--assistant-vivi-art, none);
  background-position: center;
  transform-origin: center;
  width: var(--assistant-vivi-size);
  height: var(--assistant-vivi-size);
  transform: translate(-50%, -50%) translate(var(--assistant-vivi-x), var(--assistant-vivi-y));
}

.assistant-rail__panel {
  opacity: 0;
  visibility: hidden;
  transition-delay: 0ms;
}

.assistant-rail[data-expanded="true"][data-view="panel"] .assistant-rail__panel {
  opacity: 1;
  visibility: visible;
  transition-delay: 0ms;
}

.assistant-rail:not([data-expanded="true"]) .assistant-rail__panel {
  transition-delay: var(--assistant-panel-collapse-delay);
}

.assistant-rail:not([data-view="panel"]) .assistant-rail__panel {
  opacity: 0;
  visibility: hidden;
  transition-delay: 0ms;
}

.assistant-rail__window {
  background: var(--color-panel-alt);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  opacity: 0;
  pointer-events: none;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  z-index: 1;
}

.assistant-rail[data-view="panel"] .assistant-rail__window {
  opacity: 0;
  pointer-events: none;
}

.assistant-rail:not([data-view="panel"]) .assistant-rail__window {
  opacity: 1;
  pointer-events: auto;
  transition-delay: 0ms;
}

.assistant-rail__bubble-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
  background: color-mix(in srgb, var(--color-bg) 70%, transparent);
  border-radius: var(--radius-md);
  transition:
    opacity var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
    transform var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
    background-color var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing);
}

.assistant-rail__bubble {
  opacity: 1;
  transform: translateY(0px);
  transition:
    opacity var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing),
    transform var(--assistant-rail-transition-duration) var(--assistant-rail-transition-timing);
  padding: 0;
}

.assistant-rail__bubble--visible {
  opacity: 1;
  transform: translateY(0);
}

.assistant-rail__panel-button {
  width: 100%;
  border: none;
  background: var(--color-panel-alt);
  border-radius: var(--radius-md);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0;
  cursor: pointer;
  transition: var(--transition-fast);
}

.assistant-rail__panel-button:hover,
.assistant-rail__panel-button:focus-visible {
  background: var(--color-panel);
  color: var(--color-text);
}

.assistant-rail__panel-title {
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0;
}

.assistant-rail__window-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.assistant-rail__window-title {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-text);
}

.assistant-rail__close {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 1px solid var(--color-highlight);
  background: var(--color-panel);
  color: var(--color-highlight);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.assistant-rail__close:hover,
.assistant-rail__close:focus-visible {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
}

.assistant-rail__close:hover .assistant-rail__close-icon,
.assistant-rail__close:focus-visible .assistant-rail__close-icon {
  color: var(--color-section-strong);
}

.assistant-rail__close-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: var(--assistant-close-stroke, 2);
  transition: var(--transition-fast);
}

.assistant-rail__close-icon path {
  stroke: inherit;
  stroke-width: inherit;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.assistant-rail__view {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.assistant-rail__view[aria-hidden="true"] {
  display: none;
}

.assistant-rail__view-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-weight: 500;
}

.assistant-rail__view-text {
  margin: 0;
  color: var(--color-text);
  font-size: 0.8rem;
  line-height: 1.6;
}

.assistant-rail__media {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.assistant-rail__media-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-panel);
}

.assistant-rail__media video {
  width: 100%;
  display: block;
  filter: brightness(0.85);
}

.assistant-rail__media-caption {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}

.assistant-rail__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.assistant-rail__form-guidance {
  font-size: 0.8rem;
  color: var(--color-text);
  line-height: 1.6;
}

.assistant-rail__form-guidance p {
  margin: 0;
}

.assistant-rail__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.assistant-rail__field textarea {
  width: 100%;
  min-height: 120px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  padding: var(--space-sm);
  resize: vertical;
  font: inherit;
}

.assistant-rail__field textarea:focus-visible {
  outline: 2px solid var(--color-highlight);
  outline-offset: 2px;
}

.assistant-rail__form-actions {
  display: flex;
  justify-content: center;
}

.assistant-rail__form-confirm {
  display: none;
  flex-direction: column;
  gap: var(--space-sm);
  padding: 0;
  border: none;
  background: transparent;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-confirm {
  display: flex;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__field textarea {
  display: none;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-preview {
  display: block;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-actions {
  display: none;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-notice {
  display: none;
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-guidance {
  display: none;
}

.assistant-rail__form-confirm-body {
  display: none;
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text);
}

.assistant-rail__form[data-form-state="confirm"] .assistant-rail__form-confirm-body {
  display: block;
}

.assistant-rail__form-preview {
  display: none;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-highlight);
  padding: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.assistant-rail__form-confirm-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.assistant-rail__button {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: var(--space-2xs) var(--space-md);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  font: inherit;
  transition: var(--transition-fast);
}

.assistant-rail__button--primary {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
  color: #050505;
}

.assistant-rail__button--primary:hover,
.assistant-rail__button--primary:focus-visible {
  box-shadow: 0 0 0 2px rgba(155, 140, 255, 0.25);
}

.assistant-rail__button--ghost {
  border-color: transparent;
  background: rgba(255, 255, 255, 0.04);
}

.assistant-rail__button:hover,
.assistant-rail__button:focus-visible {
  border-color: var(--color-border-strong);
}

.assistant-rail__form-status {
  min-height: 1rem;
  font-size: 0.8rem;
  margin: 0;
  color: var(--color-text-muted);
}

.assistant-rail__form-notice {
  font-size: 0.75rem;
  color: var(--color-text);
  margin: 0;
}

.assistant-rail__view-body--submitted {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
}

.assistant-rail__submitted-detail {
  display: flex;
  gap: var(--space-xs);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  align-items: baseline;
}

.assistant-rail__submitted-value {
  color: var(--color-text);
}

@media (max-width: 900px) {
  body {
    overflow: auto;
  }

  .site-header__inner {
    grid-template-columns: 1fr;
    height: auto;
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .app-shell {
    grid-template-columns: 1fr;
    padding: var(--space-lg) var(--space-md);
    height: auto;
  }

  .app-shell__content,
  .app-shell__sidebar,
  .app-shell__toc {
    height: auto;
    overflow: visible;
    position: static;
    padding: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

body.lightbox-open {
  overflow: hidden;
}

.lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.lightbox.is-open {
  display: flex;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.lightbox__close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  border: none;
  background: transparent;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xs);
}

.lightbox__image-area {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

.lightbox__media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__media img,
.lightbox__media video {
  max-width: 80vw;
  max-height: 70vh;
  transition: transform 0.2s ease;
  cursor: zoom-in;
  flex: 0 1 auto;
  z-index: 1;
}

.lightbox__media video {
  background: #000;
}

.lightbox__media img.is-zoomed {
  cursor: zoom-out;
}

.lightbox__nav {
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  width: 2.75rem;
  height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.lightbox__nav:hover,
.lightbox__nav:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.lightbox__icon {
  display: inline-flex;
  width: 1.15rem;
  height: 1.15rem;
}

.lightbox__close .lightbox__icon {
  width: 1.25rem;
  height: 1.25rem;
}

.lightbox__icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
}

/* Mobile Navigation & Assistant Rail Overlay */
.site-header__menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-xs);
  margin-right: var(--space-xs);
}

.site-header__menu-btn .icon {
  width: 24px;
  height: 24px;
}

.site-header__search-toggle {
  display: none;
}

/* Backdrop for mobile nav */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(2px);
}

body.nav-open .nav-backdrop {
  opacity: 1;
  pointer-events: auto;
}

/* Mobile Assistant Styles */
.sidebar__mobile-assistant {
  display: none;
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 1100px) {
  .site-header__menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
  }

  .site-header__inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: 0 var(--space-md);
    width: 100%;
  }

  .site-header__logo {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    min-width: auto;
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 0;
    max-width: 260px;
  }

  .site-header__actions {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    justify-content: flex-end;
    flex: 0 0 auto;
    width: auto;
  }

  .site-header__search-toggle {
    display: inline-flex;
  }

  .site-header__search {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    z-index: 1;
  }

  body.search-open .site-header__search {
    display: block;
  }

  body.search-open .search-box__input {
    width: 100%;
  }

  body.search-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(8px);
    z-index: 0;
    pointer-events: none;
  }

  /* User Strategy: Fixed Sidebar Overlay */
  .app-shell__sidebar {
    position: fixed !important;
    top: var(--header-height);
    left: 0;
    bottom: auto;
    width: 85%;
    max-width: 320px;
    background: var(--color-bg);
    z-index: 2;
    transform: translateX(-100%);
    transition: none;
    border-right: 1px solid var(--color-border);
    padding: 0;
    margin: 0;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-strong) transparent;
  }

  .app-shell__sidebar::-webkit-scrollbar {
    width: 8px;
  }

  .app-shell__sidebar::-webkit-scrollbar-track {
    background: transparent;
  }

  .app-shell__sidebar::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: 999px;
  }

  .app-shell__sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
  }

  /* Reset rail inside sidebar to be static and full width */
  .app-shell__sidebar .rail {
    position: static;
    width: 100%;
    height: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .sidebar__nav-wrapper {
    overflow: visible;
    max-height: none;
  }

  body.nav-open {
    overflow: hidden;
  }

  /* Open state */
  body.nav-open .app-shell__sidebar {
    transition: transform 0.3s ease;
    transform: translateX(0);
  }

  body.nav-closing .app-shell__sidebar {
    transition: transform 0.3s ease;
  }

  /* Show mobile assistant */
  .sidebar__mobile-assistant {
    display: block;
  }

  /* Hide desktop assistant if present in sidebar (it's not, but just in case) */
  .sidebar>.assistant-rail {
    display: none;
  }
}