@charset "UTF-8";

:root {
  color-scheme: light;
  --cream: #fbf8f0;
  --paper: #ffffff;
  --ink: #193c39;
  --muted: #526661;
  --teal: #155c56;
  --teal-dark: #103f3b;
  --teal-soft: #e6f0e8;
  --coral: #b94c35;
  --coral-soft: #fbe5d8;
  --sand: #f1eadb;
  --line: #d8dfd4;
  --focus: #a43e29;
  --radius: 1.25rem;
  --shadow: 0 0.45rem 1.8rem rgb(31 65 55 / 7%);
  --content: 76rem;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, sans-serif;
  color: var(--ink);
  background: var(--cream);
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

* { box-sizing: border-box; }
body { margin: 0; min-inline-size: 20rem; line-height: 1.75; }
button, input, select, textarea { font: inherit; }
button, select, input { max-inline-size: 100%; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: var(--teal); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
img, svg { max-inline-size: 100%; }
img { display: block; block-size: auto; }
svg { vertical-align: middle; }
h1, h2, h3, p, ul, ol, dl { margin-block-start: 0; }
h1, h2, h3 { line-height: 1.4; overflow-wrap: anywhere; }
ul, ol { padding-inline-start: 1.6em; }
li + li { margin-block-start: .45em; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; border-radius: .2rem; }
::selection { background: #f8d6a7; color: var(--ink); }
.sr-only { position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; inset-block-start: .5rem; inset-inline-start: 1rem; z-index: 100; padding: .7rem 1rem; color: #fff; background: var(--teal-dark); border-radius: .5rem; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.container, .header-inner, .hero-inner, .catalog-section, .activity-detail, .breadcrumb, .footer-inner { inline-size: min(calc(100% - 3rem), var(--content)); margin-inline: auto; }

.site-header { background: var(--cream); border-block-end: 1px solid rgb(21 92 86 / 10%); }
.header-inner { min-block-size: 6rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem 1.5rem; padding-block: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); font-size: 1.13rem; font-weight: 800; line-height: 1.5; text-decoration: none; max-inline-size: 33rem; }
.brand svg, .brand img { inline-size: 2.75rem; block-size: 2.75rem; flex: 0 0 auto; }
.brand-text { display: block; }
.brand-tagline { display: block; color: var(--muted); font-size: .75rem; font-weight: 500; margin-block-start: .15rem; }
.header-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.locale-control { display: flex; flex-direction: column; gap: .15rem; }
.locale-control label { font-size: .72rem; font-weight: 700; color: var(--muted); }
#language-select { min-block-size: 2.75rem; inline-size: 9.5rem; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: .65rem; padding: .45rem .7rem; }
.button, button#favorites-toggle, button[data-action="print"] { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-block-size: 2.75rem; padding: .65rem 1.1rem; border: 1px solid var(--teal); border-radius: .75rem; background: var(--teal); color: #fff; font-weight: 700; line-height: 1.5; text-decoration: none; }
.button:hover, button[data-action="print"]:hover { background: var(--teal-dark); }
.button--secondary, .button.secondary, button#favorites-toggle { background: transparent; color: var(--teal); border-color: #b7c9be; }
.button--secondary:hover, .button.secondary:hover, button#favorites-toggle:hover, button#favorites-toggle[aria-pressed="true"] { background: var(--teal-soft); }
.button--ghost { color: var(--teal); background: transparent; border-color: transparent; }
.button--ghost:hover { background: var(--teal-soft); }
.button svg, #favorites-toggle svg { inline-size: 1.2em; block-size: 1.2em; flex: 0 0 auto; }
[data-favorites-count] { display: inline-flex; align-items: center; justify-content: center; min-inline-size: 1.65rem; padding-inline: .35rem; border-radius: 2rem; background: var(--teal-soft); color: var(--teal-dark); font-size: .8rem; }

.hero { position: relative; padding-block: clamp(2.25rem, 5vw, 4.75rem) 2.75rem; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 2.5rem; align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow, .hero-eyebrow { color: var(--coral); font-size: .84rem; font-weight: 800; letter-spacing: .08em; margin-block-end: 1rem; }
.hero h1 { font-size: clamp(2rem, 4vw, 3.65rem); letter-spacing: -.035em; line-height: 1.3; margin-block-end: 1.15rem; }
.hero-description { max-inline-size: 38rem; color: var(--muted); font-size: 1.02rem; line-height: 1.95; margin-block-end: 0; }
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; min-inline-size: 0; }
.hero-visual img, .hero-visual svg { inline-size: min(100%, 27rem); block-size: auto; }
.hero-stat, .count-pill { display: inline-flex; align-items: baseline; gap: .4rem; padding: .4rem .85rem; margin-block-start: 1.2rem; border-radius: 2rem; background: var(--coral-soft); color: var(--ink); font-size: .85rem; }
.hero-stat strong, .count-pill strong { font-size: 1.2rem; }

.catalog-section { padding-block-end: 4rem; scroll-margin-block-start: 1rem; }
.catalog-tools, #catalog-form { padding: clamp(1.1rem, 2.5vw, 2rem); border: 1px solid #dce3d7; border-radius: 1.5rem; background: var(--paper); box-shadow: var(--shadow); }
.catalog-tools #catalog-form { border: 0; padding: 0; box-shadow: none; }
.search-row { display: flex; align-items: flex-end; gap: .75rem; margin-block-end: 1.35rem; }
.search-field { flex: 1; min-inline-size: 0; }
.search-field label { display: block; margin-block-end: .5rem; font-size: 1rem; font-weight: 800; }
#search-input { inline-size: 100%; min-block-size: 3.35rem; padding: .75rem 1rem; border: 1.5px solid #aabfb3; border-radius: .8rem; background: #fff; color: var(--ink); font-size: 1rem; }
#search-input::placeholder { color: #6b7a74; opacity: 1; }
.search-row .button, .search-row button[type="submit"] { min-block-size: 3.35rem; padding-inline: 1.5rem; }
.filter-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; }
.field { min-inline-size: 0; }
.field label { display: block; color: var(--muted); font-size: .82rem; font-weight: 750; margin-block-end: .35rem; }
.field select { inline-size: 100%; min-inline-size: 0; min-block-size: 3rem; padding: .6rem .75rem; border: 1px solid #c4d1c4; border-radius: .65rem; background: var(--cream); color: var(--ink); font-size: .9rem; }
.filter-actions { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .6rem 1rem; margin-block-start: 1.1rem; }
.checkbox-label { display: inline-flex; align-items: center; gap: .55rem; min-block-size: 2.75rem; font-size: .88rem; cursor: pointer; }
input[type="checkbox"] { inline-size: 1.15rem; block-size: 1.15rem; accent-color: var(--teal); }
#filters-reset { min-block-size: 2.75rem; border: 0; background: transparent; color: var(--teal); padding: .5rem .2rem; text-decoration: underline; text-underline-offset: .25em; font-size: .88rem; }
.chapter-nav { display: flex; gap: .6rem; overflow-x: auto; padding: 1.55rem .2rem 1rem; margin-block-end: 1rem; scrollbar-width: thin; scrollbar-color: #a3b8a9 transparent; overscroll-behavior-inline: contain; }
.chapter-chip { flex: 0 0 auto; display: inline-flex; align-items: center; gap: .5rem; min-block-size: 2.75rem; max-inline-size: 26rem; padding: .55rem 1rem; border: 1px solid #d4ddcf; border-radius: 2rem; color: var(--teal-dark); background: transparent; font-size: .85rem; line-height: 1.45; text-decoration: none; }
.chapter-chip:hover { background: var(--teal-soft); border-color: #a7bfae; }
.chapter-chip[aria-current="true"], .chapter-chip.is-active { color: #fff; background: var(--teal); border-color: var(--teal); }
.chapter-chip small { opacity: .75; font-size: .8em; }
.results-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .55rem 1rem; }
#results-count { margin: 0; font-size: 1rem; font-weight: 750; }
.results-total { color: var(--muted); font-size: .83rem; white-space: nowrap; }
.game-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; align-items: stretch; }
.game-card { --chapter-accent: #d9e9dc; position: relative; display: flex; flex-direction: column; min-inline-size: 0; padding: 1.3rem; border: 1px solid #d9e0d4; border-block-start: 5px solid var(--chapter-accent); border-radius: var(--radius); background: var(--paper); box-shadow: 0 .2rem .8rem rgb(31 65 55 / 3%); transition: border-color .15s, box-shadow .15s, transform .15s; }
.game-card[data-chapter="2"], .game-card[data-chapter="8"], .game-card[data-chapter="14"] { --chapter-accent: #f0d5bd; }
.game-card[data-chapter="3"], .game-card[data-chapter="9"], .game-card[data-chapter="15"] { --chapter-accent: #cbdfea; }
.game-card[data-chapter="4"], .game-card[data-chapter="10"], .game-card[data-chapter="16"] { --chapter-accent: #ead4da; }
.game-card[data-chapter="5"], .game-card[data-chapter="11"], .game-card[data-chapter="17"] { --chapter-accent: #e1d8ee; }
.game-card[data-chapter="6"], .game-card[data-chapter="12"], .game-card[data-chapter="18"] { --chapter-accent: #e9dfba; }
.game-card:hover { border-color: #a3b9a6; box-shadow: var(--shadow); transform: translateY(-2px); }
.game-card:focus-within { outline: 2px solid var(--teal); outline-offset: 2px; }
.card-top { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: .45rem; margin-block-end: .7rem; }
.chapter-badge { display: inline-flex; align-items: center; gap: .35rem; color: var(--teal); font-size: .72rem; font-weight: 750; line-height: 1.5; overflow-wrap: anywhere; }
.chapter-icon { flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; inline-size: 1.7rem; block-size: 1.7rem; border-radius: 50%; background: var(--chapter-accent, var(--teal-soft)); color: var(--teal-dark); font-size: .95rem; }
.card-number { color: var(--muted); font-size: .76rem; white-space: nowrap; }
.icon-button { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; min-inline-size: 2.75rem; min-block-size: 2.75rem; padding: .6rem; border: 1px solid #dce4d8; border-radius: 50%; color: var(--teal); background: #fff; }
.icon-button svg { inline-size: 1.25rem; block-size: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.8; }
.icon-button:hover { background: var(--cream); border-color: #a9bda9; }
.favorite-button.is-favorite, .favorite-button[aria-pressed="true"] { color: var(--coral); background: #fff0e9; border-color: #e4b9a7; }
.favorite-button.is-favorite svg, .favorite-button[aria-pressed="true"] svg { fill: currentColor; }
.card-heading { margin-block-end: .65rem; font-size: 1.17rem; font-weight: 800; }
.card-link { color: var(--ink); text-decoration: none; }
.card-link::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.favorite-button { position: relative; z-index: 2; }
.card-summary { color: var(--muted); font-size: .87rem; line-height: 1.85; margin-block-end: 1.15rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem .9rem; margin-block: auto 0; padding-block-start: 1rem; border-block-start: 1px solid #e6eade; font-size: .83rem; }
.card-meta > div { min-inline-size: 0; }
.card-meta dt { color: var(--muted); font-size: .71rem; margin-block-end: .1rem; }
.card-meta dd { margin: 0; line-height: 1.6; overflow-wrap: anywhere; }
.empty-state { padding: 3rem 1.5rem; border: 1px dashed #bbcbb9; border-radius: var(--radius); background: #fffdf7; text-align: center; }
.empty-state h3 { font-size: 1.25rem; }
.empty-state p { color: var(--muted); margin-inline: auto; max-inline-size: 35rem; }

.breadcrumb { padding-block: 1.4rem .5rem; color: var(--muted); font-size: .86rem; }
.breadcrumb a { display: inline-flex; align-items: center; min-block-size: 2.75rem; gap: .4rem; }
.activity-detail { padding-block: 1rem 4rem; }
.detail-header { max-inline-size: 65rem; margin-block-end: 2rem; }
.activity-number { display: block; color: var(--coral); font-size: .93rem; font-weight: 800; margin-block-end: .4rem; }
.detail-header h1 { font-size: clamp(1.8rem, 3.3vw, 2.8rem); line-height: 1.45; margin-block-end: 1rem; letter-spacing: -.025em; }
.detail-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-block: 1.25rem; }
.detail-actions .favorite-button { border-radius: .75rem; padding-inline: 1rem; gap: .5rem; }
.detail-metadata { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-block: 1.3rem; padding: 1.2rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--teal-soft); }
.detail-metadata dt { color: var(--muted); font-size: .8rem; margin-block-end: .2rem; }
.detail-metadata dd { margin: 0; font-size: .95rem; font-weight: 650; overflow-wrap: anywhere; }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 18.5rem; gap: 2rem; align-items: start; }
.detail-main { min-inline-size: 0; padding: clamp(1.2rem, 3vw, 2.4rem); background: var(--paper); border: 1px solid var(--line); border-radius: 1.5rem; }
.detail-aside { position: sticky; inset-block-start: 1.5rem; min-inline-size: 0; padding: 1.35rem; border: 1px solid var(--line); border-radius: 1.2rem; background: #f1f1e5; font-size: .9rem; }
.detail-aside h2 { font-size: 1.05rem; }
.detail-section { margin-block-end: 2rem; scroll-margin-block-start: 1rem; }
.detail-section:last-child { margin-block-end: 0; }
.detail-section h2 { display: flex; align-items: center; gap: .65rem; font-size: 1.3rem; margin-block-end: 1rem; }
.detail-section h2::before { content: ""; display: block; inline-size: .35rem; block-size: 1.2em; border-radius: .25rem; background: var(--coral); flex: 0 0 auto; }
.materials-list { padding-inline-start: 1.4rem; }
.materials-list li::marker { color: var(--teal); }
.steps { padding-inline-start: 0; list-style: none; counter-reset: step; }
.steps > li { position: relative; counter-increment: step; padding-inline-start: 3rem; margin-block-end: 1.35rem; min-block-size: 2.1rem; font-size: 1rem; line-height: 1.95; }
.steps > li::before { content: counter(step); position: absolute; inset-inline-start: 0; inset-block-start: .12rem; display: grid; place-items: center; inline-size: 2rem; block-size: 2rem; border-radius: 50%; color: #fff; background: var(--teal); font-size: .86rem; font-weight: 800; line-height: 1; direction: ltr; }
.point-note { padding: 1.4rem; border-radius: 1rem; background: var(--coral-soft); border-inline-start: 4px solid var(--coral); line-height: 1.95; }
.point-note h2 { color: #813b2d; font-size: 1.12rem; }
.point-note h2::before { display: none; }
.point-note p:last-child, .adaptation-note p:last-child { margin-block-end: 0; }
.adaptation-note { padding: 1.15rem 1.35rem; border: 1px solid var(--line); border-radius: 1rem; background: #f6f8ee; line-height: 1.95; }
.source-list { font-size: .88rem; padding-inline-start: 1.35rem; }
.source-list a { overflow-wrap: anywhere; }
.related-list { padding-inline-start: 1.25rem; }
.related-list a { display: inline-block; padding-block: .25rem; }
.translation-note, .updated-at, .original-name { color: var(--muted); font-size: .83rem; }
.detail-diagram { margin-block: 0 1.75rem; overflow: hidden; }
.detail-diagram figure { margin: 0; }
.detail-diagram svg { display: block; inline-size: 100%; block-size: auto !important; max-block-size: 27rem; }
.detail-diagram figcaption { color: var(--muted); font-size: .83rem; line-height: 1.65; margin-block-start: .65rem; }
.diagram-key { padding: 1rem; margin-block-start: 1rem; border: 1px solid var(--line); border-radius: .8rem; background: #f6f8f0; }
.diagram-key-title { margin-block-end: .65rem; font-size: .93rem; font-weight: 750; }
.diagram-legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem 1.1rem; margin: 0; font-size: .9rem; line-height: 1.75; }
.diagram-legend > div { display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: .55rem; align-items: baseline; min-inline-size: 0; }
.diagram-legend dt { display: inline-flex; align-items: center; justify-content: center; min-block-size: 1.8rem; padding-inline: .25rem; border-radius: .35rem; background: #dfeae0; font-weight: 800; text-align: center; }
.diagram-legend dd { margin: 0; min-inline-size: 0; overflow-wrap: anywhere; }

.site-footer { border-block-start: 1px solid #d7dfd1; background: #f1eddf; color: var(--muted); font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem; padding-block: 2rem; }
.site-footer p { max-inline-size: 44rem; margin-block-end: .5rem; }
.site-footer a { min-block-size: 2.75rem; display: inline-flex; align-items: center; }
.app-status { position: fixed; z-index: 50; inset-block-end: 1rem; inset-inline: 1rem; inline-size: fit-content; max-inline-size: min(34rem, calc(100% - 2rem)); margin-inline: auto; padding: .8rem 1.2rem; border-radius: .85rem; background: var(--teal-dark); color: #fff; box-shadow: 0 .3rem 1.5rem rgb(0 0 0 / 18%); font-size: .9rem; opacity: 0; transform: translateY(.5rem); transition: opacity .16s, transform .16s; pointer-events: none; }
.app-status.is-visible { opacity: 1; transform: none; }
.app-notice { padding: .8rem 1rem; margin-block: 1rem; border-radius: .7rem; background: #fff1d8; color: #62471d; }
#ad-slot:not([data-configured="true"]) { display: none; }
#ad-slot[data-configured="true"] { min-block-size: 1px; margin-block: 2rem; }

:lang(ar) { font-family: "Noto Sans Arabic", Tahoma, Arial, sans-serif; }
:lang(hi) { font-family: "Noto Sans Devanagari", "Nirmala UI", system-ui, sans-serif; }
:lang(zh-CN), :lang(zh-TW) { font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; }
:lang(ko) { font-family: "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif; }
[dir="rtl"] .hero h1, [dir="rtl"] .detail-header h1 { letter-spacing: 0; }
[dir="rtl"] .card-number, [dir="rtl"] .activity-number { unicode-bidi: isolate; direction: ltr; }
[dir="rtl"] .breadcrumb .back-arrow { transform: scaleX(-1); }

@media (min-width: 1350px) {
  .game-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 1000px) {
  .game-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .detail-layout { grid-template-columns: minmax(0, 1fr); }
  .detail-aside { position: static; }
  .hero-inner { grid-template-columns: 1.15fr .85fr; gap: 1.5rem; }
  .header-inner { gap: .8rem 1rem; }
  .brand { font-size: 1rem; max-inline-size: 28rem; }
}
@media (max-width: 700px) {
  .container, .header-inner, .hero-inner, .catalog-section, .activity-detail, .breadcrumb, .footer-inner { inline-size: calc(100% - 2rem); }
  .header-inner { padding-block: .85rem; }
  .brand { flex-basis: 100%; font-size: 1.03rem; max-inline-size: none; }
  .brand svg, .brand img { inline-size: 2.4rem; block-size: 2.4rem; }
  .brand-tagline { display: none; }
  .header-controls { inline-size: 100%; justify-content: space-between; }
  .locale-control { flex: 1; min-inline-size: 0; }
  #language-select { inline-size: 100%; max-inline-size: 13rem; }
  #favorites-toggle { font-size: .85rem; }
  .hero { padding-block: 2rem 1.5rem; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 1.2rem; }
  .hero h1 { font-size: clamp(2rem, 7.8vw, 2.8rem); margin-block-end: .8rem; }
  .hero-description { font-size: .92rem; line-height: 1.85; }
  .hero-visual { min-block-size: 0; }
  .hero-visual img, .hero-visual svg { inline-size: min(100%, 21rem); max-block-size: 12rem; object-fit: contain; }
  .eyebrow, .hero-eyebrow { font-size: .75rem; margin-block-end: .6rem; }
  .search-row { align-items: stretch; gap: .6rem; }
  .search-row .button, .search-row button[type="submit"] { padding-inline: 1rem; }
  #search-input { font-size: 1rem; padding-inline: .75rem; }
  .filter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem .7rem; }
  .field select { font-size: .84rem; }
  .chapter-nav { margin-inline: -.15rem; padding-block-start: 1.15rem; }
  .game-grid { gap: .9rem; }
  .game-card { padding: 1.1rem; }
  .detail-header { margin-block-end: 1.5rem; }
  .detail-header h1 { font-size: clamp(1.65rem, 6.7vw, 2.1rem); }
  .detail-metadata { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem .7rem; padding: 1rem; }
  .detail-main { padding: 1.25rem; border-radius: 1.1rem; }
  .detail-section h2 { font-size: 1.15rem; }
  .steps > li { padding-inline-start: 2.65rem; font-size: .97rem; }
  .steps > li::before { inline-size: 1.85rem; block-size: 1.85rem; }
  .point-note { padding: 1.1rem; }
  .diagram-legend { grid-template-columns: minmax(0, 1fr); font-size: .9rem; }
  .detail-diagram svg { min-block-size: 0; }
}
@media (max-width: 520px) {
  .game-grid { grid-template-columns: minmax(0, 1fr); }
  .search-row { flex-wrap: wrap; }
  .search-field { flex-basis: 100%; }
  .search-row .button, .search-row button[type="submit"] { inline-size: 100%; }
  .results-toolbar { gap: .6rem; align-items: baseline; }
  #results-count { font-size: .92rem; }
  .results-total { font-size: .75rem; }
  .card-heading { font-size: 1.2rem; }
  .card-summary { font-size: .9rem; }
  .card-meta { font-size: .88rem; }
  .card-meta dt { font-size: .75rem; }
  .detail-actions > .button, .detail-actions > button { flex: 1; }
  .detail-actions .favorite-button { border-radius: .75rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
  .game-card:hover { transform: none; }
}
@media (forced-colors: active) {
  .game-card, .button, .icon-button, .chapter-chip, .point-note, .diagram-key { border: 1px solid CanvasText; }
  .steps > li::before { border: 1px solid CanvasText; }
  .favorite-button[aria-pressed="true"] { outline: 2px solid Highlight; }
}
@media print {
  :root, body { background: #fff; color: #111; font-size: 10.5pt; }
  .site-header, .site-footer, .breadcrumb, .detail-actions, .detail-aside, .skip-link, .app-status, .hero, #catalog-form, .chapter-nav, .filter-actions, .favorite-button, #ad-slot { display: none !important; }
  .activity-detail, .detail-header, .detail-main { inline-size: 100%; max-inline-size: none; margin: 0; padding: 0; border: 0; border-radius: 0; box-shadow: none; }
  .detail-layout { display: block; }
  .detail-header h1 { font-size: 20pt; }
  .detail-metadata { background: #fff; grid-template-columns: repeat(4, minmax(0, 1fr)); padding: .5rem; }
  .detail-section { break-inside: auto; margin-block-end: 1rem; }
  h1, h2, h3 { break-after: avoid; }
  .detail-diagram, .point-note, .adaptation-note, .diagram-key { break-inside: avoid; }
  .detail-diagram svg { max-block-size: 6cm; }
  .steps > li { break-inside: avoid; font-size: 10.5pt; line-height: 1.7; margin-block-end: .6rem; }
  .steps > li::before { background: #fff; color: #111; border: 1px solid #777; }
  .diagram-legend { font-size: 10.5pt; }
  .point-note, .adaptation-note { background: #fff; border: 1px solid #aaa; }
  .source-list { font-size: 9pt; }
  a { color: inherit; }
  .game-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .game-card { break-inside: avoid; box-shadow: none; }
  .card-link::after { display: none; }
}