:root {
  --canvas: #f7f7f5;
  --surface: #ffffff;
  --ink: #14181f;
  --ink-soft: #4a5260;
  --rule: #d9dce1;
  --accent: #1f4fd8;
  --accent-soft: #e8edfb;
  --radius: 6px;
  --container: 1080px;
  --gap: 28px;
}

/* ============ base ============ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  line-height: 1.35;
  color: var(--ink);
}

h1 {
  font-size: 30px;
  font-weight: 700;
}

h2 {
  font-size: 22px;
  font-weight: 700;
}

h3 {
  font-size: 18px;
  font-weight: 700;
}

h4 {
  font-size: 16px;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.35em;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
.tab-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 6px;
}

time {
  font-variant-numeric: tabular-nums;
}

dl {
  margin: 0 0 1em;
}

dt {
  font-weight: 700;
}

dd {
  margin: 0 0 0.5em;
  color: var(--ink-soft);
}

table {
  border-collapse: collapse;
  width: 100%;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* ============ layout ============ */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
  padding: 14px 0;
}

.site-header .brand::before {
  content: "";
  width: 22px;
  height: 22px;
  border: 2px solid var(--accent);
  border-radius: 4px;
  background:
    linear-gradient(var(--accent), var(--accent)) 4px 4px / 8px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 4px 9px / 12px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 4px 14px / 6px 2px no-repeat;
  flex: none;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.site-nav .nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-weight: 600;
}

.site-nav .nav-toggle::before {
  content: "";
  width: 16px;
  height: 2px;
  background: var(--ink);
  box-shadow: 0 -5px 0 var(--ink), 0 5px 0 var(--ink);
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav .nav-list li {
  margin: 0;
}

.site-nav .nav-list .nav-group-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-soft);
  padding: 0 8px 0 14px;
  border-left: 1px solid var(--rule);
}

.site-nav .nav-list .nav-group-title:first-child {
  border-left: 0;
  padding-left: 0;
}

.site-nav .nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 2px solid transparent;
}

.site-nav .nav-list a:hover,
.site-nav .nav-list a:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: underline;
}

.site-nav .nav-list a.is-current {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px 56px;
}

.home-main {
  padding-top: 8px;
}

.inner-main {
  padding-top: 0;
}

.fact-bar {
  max-width: var(--container);
  margin: 0 auto;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}

/* ============ components ============ */

.section,
.summary-section,
.genre-overview,
.cover-update-section,
.rank-field-section,
.site-index-section,
.genre-intro,
.genre-list,
.tag-guide,
.related-jump,
.update-batch,
.update-timeline,
.update-scope,
.update-relation,
.guide-steps,
.entry-notes,
.feedback-guide,
.guide-faq,
.related-links,
.ranking-scope,
.ranking-list,
.rank-cross,
.rank-change {
  padding: 36px 0;
  border-bottom: 1px solid var(--rule);
}

.section:last-child,
.summary-section:last-child,
.genre-overview:last-child,
.cover-update-section:last-child,
.rank-field-section:last-child,
.site-index-section:last-child {
  border-bottom: 0;
}

.section-lead,
.summary-lead,
.batch-lead,
.timeline-lead {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 72ch;
}

.section-lead a,
.summary-lead a {
  color: var(--accent);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
  padding: 14px 0 0;
}

.breadcrumb a {
  color: var(--ink-soft);
}

.breadcrumb-sep {
  color: var(--rule);
}

.breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

.page-header {
  padding: 18px 0 24px;
  border-bottom: 1px solid var(--rule);
}

.page-title {
  margin-bottom: 10px;
}

.page-description {
  color: var(--ink-soft);
  max-width: 78ch;
  margin-bottom: 0;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.6;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink-soft);
  margin-right: 6px;
}

.tag-status {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-length {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--ink);
}

/* ============ pages: home ============ */

.summary-section {
  padding-top: 32px;
}

.summary-text {
  max-width: 100%;
}

.home-title {
  margin-bottom: 14px;
}

.summary-lead {
  font-size: 17px;
  color: var(--ink);
  max-width: 68ch;
}

.summary-paths {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
}

.summary-paths li {
  margin: 0;
}

.summary-paths a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.summary-paths a:hover,
.summary-paths a:focus-visible {
  background: var(--accent);
  color: #ffffff;
  text-decoration: underline;
}

.summary-visual {
  margin: 24px 0 0;
}

.summary-visual img {
  width: 100%;
  max-width: 640px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 24px;
}

.genre-block {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.genre-block h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  margin-bottom: 10px;
}

.genre-block p {
  font-size: 15px;
  color: var(--ink-soft);
}

.genre-items {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}

.genre-items li {
  font-size: 15px;
  margin-bottom: 8px;
  padding-left: 12px;
  position: relative;
}

.genre-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 1px;
}

.cover-update-layout,
.rank-field-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap);
  margin-top: 20px;
}

.cover-column,
.update-column,
.rank-column,
.field-column {
  min-width: 0;
}

.cover-column h3,
.update-column h3,
.rank-column h3,
.field-column h3 {
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 12px;
}

.cover-column p,
.update-column p,
.rank-column p,
.field-column p {
  font-size: 15px;
  color: var(--ink-soft);
}

.cover-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.cover-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 12px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cover-card:hover,
.cover-card:focus-within {
  border-color: var(--accent);
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
  background: var(--canvas);
}

.cover-name {
  font-weight: 700;
  font-size: 15px;
}

.cover-tag {
  font-size: 13px;
  color: var(--ink-soft);
}

.update-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  border-top: 1px solid var(--rule);
}

.update-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
}

.update-row time,
.update-row .row-date {
  color: var(--ink-soft);
  font-size: 14px;
  white-space: nowrap;
}

.update-name,
.update-row .row-name {
  font-weight: 600;
}

.update-genre,
.update-row .row-genre,
.update-scope,
.update-row .row-scope {
  font-size: 13px;
  color: var(--ink-soft);
}

.update-scope,
.update-row .row-scope {
  grid-column: 2 / -1;
}

.rank-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  border-top: 1px solid var(--rule);
}

.rank-list .rank-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
}

.rank-list .rank-no {
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.rank-list .rank-name {
  font-weight: 600;
}

.rank-list .rank-genre,
.rank-list .rank-note {
  font-size: 13px;
  color: var(--ink-soft);
}

.rank-list .rank-note {
  grid-column: 2 / -1;
}

.field-summary {
  margin: 16px 0 0;
  border-top: 1px solid var(--rule);
}

.field-summary dt {
  padding-top: 12px;
  font-size: 15px;
}

.field-summary dd {
  padding-bottom: 10px;
  margin: 0;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
}

.field-summary dd:last-of-type {
  border-bottom: 0;
}

.column-index {
  margin-top: 20px;
}

.column-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.column-item {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px;
}

.column-item a {
  display: inline-block;
  font-weight: 700;
  margin-bottom: 6px;
}

.column-item p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ============ pages: genres ============ */

.genre-intro-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 24px;
}

.genre-intro-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.genre-intro-card h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

.genre-trait {
  font-size: 15px;
  color: var(--ink-soft);
}

.genre-meta {
  margin: 12px 0 0;
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}

.genre-meta dt {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 600;
}

.genre-meta dd {
  font-size: 14px;
  margin: 0 0 8px;
}

.genre-list > .genre-block {
  margin-top: 24px;
  padding: 24px;
}

.genre-feature {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding-bottom: 20px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.cover-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background: var(--canvas);
}

.genre-feature-body h4 {
  margin-bottom: 8px;
}

.genre-feature-body p {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 0.6em;
}

.genre-tags {
  margin: 0 0 8px;
}

.entry-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}

.entry-row {
  padding: 14px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
}

.entry-row:last-child {
  border-bottom: 0;
}

.entry-row h4 {
  margin-bottom: 6px;
}

.entry-meta {
  margin: 0 0 6px;
}

.entry-note {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.tag-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.tag-guide-col {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.tag-def-list {
  margin: 0;
}

.tag-def-list dt {
  font-size: 15px;
  padding-top: 10px;
}

.tag-def-list dd {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
}

.tag-def-list dd:last-child {
  border-bottom: 0;
}

.jump-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.jump-list li {
  margin: 0;
}

.jump-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.jump-list a:hover,
.jump-list a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: underline;
}

/* ============ pages: updates ============ */

.batch-lead {
  margin-bottom: 18px;
}

.batch-media {
  margin: 0 0 20px;
}

.batch-media img {
  width: 100%;
  max-width: 620px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.batch-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  border-top: 1px solid var(--rule);
  padding-top: 18px;
}

.batch-facts dt {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 600;
}

.batch-facts dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.update-day {
  margin-top: 26px;
}

.day-title {
  font-size: 17px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 4px;
}

.update-day .update-list {
  margin-top: 0;
}

.update-day .update-row {
  grid-template-columns: 100px 64px minmax(0, 1fr);
}

.update-day .update-row img {
  width: 48px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--rule);
  grid-row: 1 / 3;
  background: var(--canvas);
}

.update-day .update-row .row-name {
  grid-column: 3;
}

.update-day .update-row .row-genre {
  grid-column: 3;
}

.update-day .update-row .row-scope {
  grid-column: 3;
}

.scope-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.update-scope .scope-item {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.update-scope .scope-item h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

.update-scope .scope-item p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.update-relation p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 78ch;
}

/* ============ pages: ranking ============ */

.scope-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.ranking-scope .scope-item {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.ranking-scope .scope-name {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  font-size: 17px;
  margin-bottom: 8px;
}

.ranking-scope .scope-item p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.rank-rows {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  border-top: 1px solid var(--rule);
}

.rank-rows .rank-row {
  display: grid;
  grid-template-columns: 52px 84px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
}

.rank-rows .rank-no {
  font-size: 20px;
  margin: 0;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.rank-cover {
  margin: 0;
}

.rank-cover img {
  width: 72px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background: var(--canvas);
}

.rank-body {
  min-width: 0;
}

.rank-body .rank-name {
  margin-bottom: 6px;
}

.rank-body .rank-meta {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.rank-body .rank-note {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.cross-tabs {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cross-tabs li {
  margin: 0;
}

.cross-tab {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.cross-tab:hover,
.cross-tab:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: underline;
}

.cross-tip {
  margin: 16px 0 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.change-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.change-item {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.change-item .change-name {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  font-size: 17px;
}

.change-item p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ============ pages: field-guide ============ */

.field-figure {
  margin: 0 0 24px;
}

.field-figure img {
  width: 100%;
  max-width: 620px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.field-table {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-table caption {
  text-align: left;
  padding: 14px 16px;
  font-weight: 700;
  border-bottom: 1px solid var(--rule);
  background: var(--accent-soft);
  color: var(--ink);
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 12px 16px;
  font-size: 15px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

.field-table thead th {
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--canvas);
}

.field-table tbody th {
  width: 22%;
  font-weight: 700;
}

.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td {
  border-bottom: 0;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.boundary-column {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.boundary-column h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

.boundary-excluded h3 {
  border-left-color: var(--ink-soft);
}

.boundary-list {
  margin: 0;
  padding-left: 1.2em;
}

.boundary-list li {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.status-tabs {
  margin-top: 20px;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--rule);
}

.tab-button {
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-bottom: 2px solid transparent;
  border-radius: var(--radius) var(--radius) 0 0;
  font-weight: 600;
  color: var(--ink-soft);
}

.tab-button:hover {
  color: var(--accent);
}

.tab-button.is-active {
  color: var(--accent);
  border-color: var(--rule);
  border-bottom-color: var(--accent);
  background: var(--surface);
}

.tab-panel {
  padding: 20px 0 0;
}

.tab-panel h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

.tab-panel p {
  color: var(--ink-soft);
  max-width: 78ch;
}

.status-points {
  margin: 0;
  padding-left: 1.2em;
}

.status-points li {
  font-size: 15px;
  color: var(--ink-soft);
}

.relation-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.relation-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.relation-card h3 {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  font-size: 17px;
}

.relation-card p {
  font-size: 15px;
  color: var(--ink-soft);
}

.relation-link {
  margin-top: auto;
  margin-bottom: 0;
}

.next-links {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-links li {
  margin: 0;
}

.next-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.next-links a:hover,
.next-links a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: underline;
}

/* ============ pages: reading-guide ============ */

.step-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
}

.step-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
}

.step-item:first-child {
  border-top: 1px solid var(--rule);
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-weight: 700;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.step-body {
  min-width: 0;
}

.step-name {
  margin-bottom: 6px;
}

.step-desc {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 72ch;
}

.step-check {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
  padding-left: 12px;
  border-left: 3px solid var(--rule);
}

.entry-notes-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap);
  margin-top: 20px;
  align-items: start;
}

.entry-notes-main {
  min-width: 0;
}

.note-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.note-item {
  padding: 16px 0;
  margin: 0;
  border-bottom: 1px solid var(--rule);
}

.note-item:first-child {
  border-top: 1px solid var(--rule);
}

.note-name {
  margin-bottom: 6px;
}

.note-desc {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.entry-figure {
  margin: 0;
}

.entry-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.feedback-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px;
}

.feedback-card .feedback-name {
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  font-size: 17px;
}

.feedback-card .feedback-desc {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.faq-list {
  margin-top: 20px;
  border-top: 1px solid var(--rule);
}

.faq-item {
  border-bottom: 1px solid var(--rule);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 14px 0;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex: none;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--accent);
  font-weight: 700;
  font-size: 17px;
}

.faq-item[open] summary::after {
  content: "−";
  border-color: var(--accent);
}

.faq-item summary:hover {
  color: var(--accent);
}

.faq-item p {
  margin: 0 0 16px;
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 78ch;
}

.related-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-list li {
  margin: 0;
}

.related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.related-list a:hover,
.related-list a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: underline;
}

/* ============ pages: 404 ============ */

.error-main {
  padding-top: 40px;
}

.error-main h1 {
  margin-bottom: 12px;
}

.error-lead {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 68ch;
}

.error-paths {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.error-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-list li {
  margin: 0;
}

.error-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.error-list a:hover,
.error-list a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: underline;
}

.error-actions {
  margin: 24px 0 0;
}

.error-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.error-home:hover,
.error-home:focus-visible {
  background: #163bb0;
  text-decoration: underline;
}

.error-note {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.error-note p {
  color: var(--ink-soft);
  max-width: 78ch;
}

/* ============ footer ============ */

.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--rule);
  padding: 36px 20px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}

.footer-brand {
  min-width: 0;
}

.footer-name {
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.footer-group {
  min-width: 0;
}

.footer-group-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
  padding-left: 10px;
  border-left: 3px solid var(--accent);
}

.footer-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-group li {
  margin-bottom: 8px;
}

.footer-group a {
  color: var(--ink-soft);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.footer-group a:hover,
.footer-group a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.footer-copy {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--ink-soft);
}

/* ============ motion enhancement ============ */

@media (prefers-reduced-motion: no-preference) {
  .genre-block,
  .genre-intro-card,
  .cover-card,
  .column-item,
  .scope-item,
  .change-item,
  .relation-card,
  .feedback-card {
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
  }

  .genre-block:hover,
  .genre-intro-card:hover,
  .column-item:hover,
  .scope-item:hover,
  .change-item:hover,
  .relation-card:hover,
  .feedback-card:hover {
    border-color: var(--accent);
  }
}

/* ============ responsive ============ */

@media (max-width: 960px) {
  .genre-grid,
  .genre-intro-grid,
  .scope-grid,
  .change-grid,
  .relation-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .column-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .scope-list,
  .feedback-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .batch-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 25px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 17px;
  }

  .site-nav {
    flex-wrap: wrap;
    padding: 0 16px;
  }

  .site-nav .nav-toggle {
    display: inline-flex;
    margin: 8px 0;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--rule);
  }

  .site-nav .nav-list.is-open {
    display: flex;
  }

  .site-nav .nav-list .nav-group-title {
    border-left: 0;
    padding: 12px 0 4px;
    font-size: 12px;
  }

  .site-nav .nav-list a {
    min-height: 44px;
    padding: 0 4px;
  }

  .site-main {
    padding: 0 16px 40px;
  }

  .fact-bar {
    padding: 10px 16px;
  }

  .summary-paths,
  .jump-list,
  .cross-tabs,
  .next-links,
  .related-list,
  .error-list {
    flex-direction: column;
    align-items: stretch;
  }

  .summary-paths a,
  .jump-list a,
  .cross-tab,
  .next-links a,
  .related-list a,
  .error-list a {
    justify-content: center;
  }

  .summary-visual img {
    max-width: 100%;
  }

  .cover-update-layout,
  .rank-field-layout,
  .tag-guide-grid,
  .boundary-columns,
  .entry-notes-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .genre-grid,
  .genre-intro-grid,
  .scope-grid,
  .change-grid,
  .relation-grid,
  .scope-list,
  .feedback-grid,
  .batch-facts,
  .column-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .cover-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .genre-feature {
    grid-template-columns: minmax(0, 1fr);
  }

  .cover-figure img {
    max-width: 200px;
  }

  .update-row {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 8px;
  }

  .update-row .update-genre,
  .update-row .row-genre {
    grid-column: 2;
  }

  .update-row .update-scope,
  .update-row .row-scope {
    grid-column: 2;
  }

  .update-day .update-row {
    grid-template-columns: 88px 56px minmax(0, 1fr);
  }

  .update-day .update-row img {
    width: 44px;
  }

  .update-day .update-row .row-name,
  .update-day .update-row .row-genre,
  .update-day .update-row .row-scope {
    grid-column: 3;
  }

  .rank-list .rank-row {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .rank-list .rank-genre {
    grid-column: 2;
  }

  .rank-list .rank-note {
    grid-column: 2;
  }

  .rank-rows .rank-row {
    grid-template-columns: 44px 68px minmax(0, 1fr);
  }

  .rank-cover img {
    width: 60px;
  }

  .step-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .step-index {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .field-table th,
  .field-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .field-table tbody th {
    width: 30%;
  }

  .site-footer {
    grid-template-columns: minmax(0, 1fr);
    padding: 28px 16px 20px;
    gap: 20px;
  }

  .footer-group ul {
    display: none;
  }

  .site-footer .footer-group.is-open ul,
  .site-footer .footer-nav ul {
    display: block;
  }

  .footer-copy {
    padding-top: 16px;
  }
}