html {
  scroll-padding-bottom: calc(104px * var(--reading-text-scale, 1) + env(safe-area-inset-bottom, 0px));
}

.reference-page {
  height: auto;
  min-height: 100dvh;
  overflow-y: auto;
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-body);
}
.reference-page * {
  box-sizing: border-box;
}
.reference-page a {
  color: var(--link-color);
  text-decoration: none;
}
.reference-page a:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}
.reference-header {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}
.reference-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  font: 800 1.5rem var(--font-display);
  color: var(--text-primary) !important;
}
.reference-brand img {
  border-radius: var(--radius-sm);
}
.reference-header-link {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}
.reference-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 28px calc(144px * var(--reading-text-scale, 1) + env(safe-area-inset-bottom, 0px));
  outline: none;
}
.reference-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.reference-breadcrumb a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.reference-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.reference-contents {
  position: sticky;
  top: 24px;
  max-height: calc(100dvh - 104px * var(--reading-text-scale, 1) - env(safe-area-inset-bottom, 0px) - 48px);
  overflow-y: auto;
  scroll-padding-block: 8px;
  padding: 14px 18px;
  border-radius: var(--radius-xl);
  background: var(--surface-card);
  box-shadow: 0 5px 0 var(--surface-floor);
}
.reference-page h2 {
  font: 800 1.5rem/1.3 var(--font-display);
  margin: 0 0 20px;
  overflow-wrap: anywhere;
}
.reference-contents summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  margin-bottom: 12px;
}
.reference-contents summary::-webkit-details-marker {
  display: none;
}
.reference-contents summary:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}
.reference-contents details[open] summary svg {
  transform: rotate(180deg);
}
.reference-contents a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  align-items: center;
  min-height: 48px;
  padding: 10px 0;
  line-height: 1.45;
  font-size: 0.9375rem;
  font-weight: 600;
  overflow-wrap: anywhere;
  scroll-margin-block: 8px;
}
.reference-contents a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.reference-sections {
  min-width: 0;
  display: grid;
  gap: 32px;
}
.reference-section {
  scroll-margin-top: 24px;
  border-radius: var(--radius-xl);
  background: var(--surface-card);
  box-shadow:
    0 7px 0 var(--surface-floor),
    inset 0 0 0 1px var(--border-light);
  padding: 32px;
  overflow: hidden;
}
.reference-section h3 {
  font: 800 1.125rem/1.4 var(--font-display);
  margin: 28px 0 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.reference-section p,
.reference-section li,
.reference-section blockquote {
  font-size: 1rem;
  line-height: calc(1.8 * var(--reading-line-scale, 1));
  overflow-wrap: anywhere;
}
.reference-section p {
  margin: 12px 0;
}
.reference-section ul {
  padding-left: 22px;
  margin: 12px 0 20px;
}
.reference-section li {
  padding-left: 4px;
  margin: 12px 0;
}
.reference-section li svg,
.reference-section p svg {
  display: inline-block;
  vertical-align: text-bottom;
  margin-right: 6px;
}
.reference-translation {
  display: block;
  color: var(--text-secondary);
  margin-top: 4px;
}
.reference-section blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}
.reference-section strong {
  font-weight: 700;
}
.reference-related {
  margin-top: 48px;
}
.reference-topics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.reference-topic {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 28px;
  border-radius: var(--radius-xl);
  background: var(--surface-card);
  box-shadow:
    0 4px 0 var(--surface-floor),
    inset 0 0 0 1px var(--border-light);
  color: var(--text-primary) !important;
  transition: transform 160ms ease-out;
  min-width: 0;
}
@media (hover: hover) and (pointer: fine) {
  .reference-topic:hover { transform: translateY(-2px); }
}
.reference-topic:active {
  transform: translateY(2px);
}
.reference-topic > strong {
  font: 800 1.75rem/1.2 var(--font-display);
  overflow-wrap: anywhere;
}
.reference-topic-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}
.reference-topic-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 8px;
  color: var(--link-color);
  font-family: var(--font-display);
  font-weight: 800;
  margin-top: auto;
  padding-top: 8px;
}
.reference-related .reference-topics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.reference-footer {
  margin-top: 48px;
  padding-top: 24px;
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.reference-footer nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.reference-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.reference-bottom {
  position: fixed;
  z-index: 10;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-body);
  padding: 16px 28px calc(16px + env(safe-area-inset-bottom, 0px));
  display: flex;
  justify-content: center;
}
.reference-action {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 560px;
  min-height: 56px;
  padding: 16px 24px;
  border-radius: var(--radius-lg);
  background: var(--sun);
  color: var(--on-sun) !important;
  box-shadow:
    0 5px 0 var(--sun-floor),
    inset 0 2px 0 var(--sun-glint);
  font-family: var(--font-display);
  font-weight: 800;
  text-align: center;
  transition: transform 160ms ease-out;
}
@media (hover: hover) and (pointer: fine) {
  .reference-action:hover { transform: translateY(-1px); }
}
.reference-action:active {
  transform: translateY(3px);
}
.reference-action:focus-visible {
  outline-color: var(--focus-ring);
}
.reference-skip {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 20;
  background: var(--surface-card);
  padding: 16px;
}
.reference-skip:focus {
  top: 16px;
}

@media (max-width: 850px) {
  .reference-layout {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
  }
  .reference-topics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .reference-section {
    padding: 28px;
  }
}
@media (max-width: 620px) {
  .reference-header {
    padding: 16px 20px;
    gap: 12px;
  }
  .reference-main {
    padding: 12px 20px calc(144px * var(--reading-text-scale, 1) + env(safe-area-inset-bottom, 0px));
  }
  .reference-brand {
    gap: 8px;
    font-size: 1.375rem;
  }
  .reference-header-link {
    font-size: 0.875rem;
  }
  .reference-layout {
    display: block;
  }
  .reference-contents {
    position: static;
    max-height: none;
    overflow-y: visible;
    margin-bottom: 24px;
  }
  .reference-contents a {
    min-height: 48px;
  }
  .reference-section {
    padding: 24px;
  }
  .reference-page h2 {
    font-size: 1.375rem;
  }
  .reference-topics,
  .reference-related .reference-topics {
    grid-template-columns: minmax(0, 1fr);
  }
  .reference-bottom {
    padding: 12px 20px calc(12px + env(safe-area-inset-bottom, 0px));
  }
  .reference-action {
    padding: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .reference-page * {
    scroll-behavior: auto;
    transition: none;
  }
  .reference-topic:hover,
  .reference-topic:active,
  .reference-action:hover,
  .reference-action:active {
    transform: none;
  }
  .reference-topic:hover { background: var(--surface-card-hover); }
  .reference-action:hover { background: var(--sun-glint); }
}

.reference-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  align-items: center;
  gap: 48px;
  margin: 28px 0 40px;
  padding: 40px 44px;
  border-radius: var(--radius-xl);
  background: var(--primary);
  color: var(--on-primary);
  box-shadow:
    0 8px 0 var(--primary-floor),
    inset 0 2px 0 var(--primary-rim);
}
.reference-intro-copy { min-width: 0; }
.reference-kicker {
  margin: 0 0 16px;
  color: var(--on-primary-muted);
  font: 800 0.9375rem/1.5 var(--font-display);
}
.reference-intro h1 {
  font: 800 clamp(2.125rem, 4.5vw, 3.5rem)/1.12 var(--font-display);
  letter-spacing: -0.035em;
  margin: 0 0 20px;
  overflow-wrap: anywhere;
}
.reference-title-detail {
  display: block;
  margin-top: 12px;
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
}
.reference-lead {
  max-width: 660px;
  margin: 0;
  color: var(--on-primary-muted);
  font-size: 1.0625rem;
  line-height: calc(1.65 * var(--reading-line-scale, 1));
  overflow-wrap: anywhere;
}
.reference-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  font: 800 1rem/1.5 var(--font-display);
}
.reference-cover {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 204px;
  padding: 24px 20px;
  border-radius: var(--radius-lg);
  background: var(--sun);
  color: var(--on-sun);
  box-shadow: 0 7px 0 var(--sun-floor), inset 0 2px 0 var(--sun-glint);
  transform: rotate(5deg);
  text-align: center;
  font: 800 1rem/1.4 var(--font-display);
}
.reference-cover strong { font-size: 1.3125rem; }
.reference-contents-number {
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--text-secondary);
  font: 800 0.875rem/1.5 var(--font-display);
  padding-top: 1px;
}
.reference-section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.reference-section-heading h2 { margin: 0; }
.reference-chapter {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--sun);
  color: var(--on-sun);
  font: 800 1.125rem/1 var(--font-display);
}
.reference-topic-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
}
.reference-topic-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 4px 0 var(--primary-floor), inset 0 2px 0 var(--primary-rim);
}
.reference-topic:nth-child(2) .reference-topic-icon {
  background: var(--sun);
  color: var(--on-sun);
  box-shadow: 0 4px 0 var(--sun-floor), inset 0 2px 0 var(--sun-glint);
}
.reference-topic-number {
  color: var(--text-secondary);
  font: 800 1.625rem/1 var(--font-display);
}
.reference-topic-count {
  margin-top: auto;
  color: var(--text-secondary);
  font: 800 0.875rem/1.5 var(--font-display);
}
.reference-topic-action { margin-top: 0; }
@media (max-width: 850px) {
  .reference-intro { gap: 28px; padding: 32px; grid-template-columns: minmax(0, 1fr) 140px; }
  .reference-cover { min-height: 180px; padding: 20px 16px; }
  .reference-cover svg { width: 56px; height: 56px; }
}
@media (max-width: 620px) {
  .reference-intro { display: block; margin: 20px 0 32px; padding: 24px 28px; }
  .reference-cover { display: none; }
  .reference-kicker { margin-bottom: 12px; font-size: 0.875rem; }
  .reference-intro h1 { font-size: clamp(1.875rem, 8.5vw, 2.25rem); margin-bottom: 16px; }
  .reference-title-detail { font-size: 1.0625rem; margin-top: 10px; }
  .reference-lead { font-size: 1rem; }
  .reference-meta { margin-top: 18px; }
  .reference-section-heading { gap: 12px; }
  .reference-topic > strong { font-size: 1.625rem; }
  .reference-contents details:not([open]) summary { margin-bottom: 0; }
}