@charset "UTF-8";

/* Dedicated to the redesigned home and collection pages; independent of default.css. */
.modern-home {
  --ink: #24364d;
  --muted: #607087;
  --blue: #075db9;
  --blue-dark: #12416f;
  --line: #dce5ee;
  --paper: #ffffff;
  margin: 0;
  background: #f3f6fa;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.95;
  -webkit-text-size-adjust: 100%;
}

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

.modern-home a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.modern-home a:hover {
  color: #003b7a;
}

.modern-home a:focus-visible,
.modern-home button:focus-visible,
.modern-home input:focus-visible {
  outline: 3px solid #c78000;
  outline-offset: 5px;
  border-radius: 2px;
}

.modern-home img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  border: 0;
}

.video-frame iframe,
iframe.twitter-timeline {
  max-width: 100%;
  border: 0;
}

.shell {
  width: min(1240px, calc(100% - 64px));
  margin-inline: auto;
}

.site-header {
  padding-top: 28px;
}

.brand {
  margin: 0;
  line-height: 0;
  font-size: inherit;
}

.brand a {
  display: block;
}

.brand img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 5px;
}

.brand--title img {
  aspect-ratio: 5 / 1;
  object-fit: cover;
  object-position: center;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
  gap: 36px;
  padding-top: 28px;
  padding-bottom: 64px;
}

#main_area,
#right_area {
  min-width: 0;
}

.intro {
  margin-bottom: 38px;
  padding: 20px 24px;
  border-left: 3px solid #2d78be;
  background: #eaf1f9;
  font-size: 14px;
  line-height: 2;
}

.intro b {
  display: inline-block;
}

.intro b a {
  white-space: normal;
}

.content-section {
  margin: 0 0 36px;
}

.collection-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  border: 1px solid #cad9e8;
  border-left: 3px solid #1371cb;
  border-radius: 4px;
  background: #fff;
  font-weight: 700;
  text-decoration: none;
}

.collection-link::after {
  content: "\2192";
  font-size: 22px;
  line-height: 1;
}

.collection-link:hover {
  background: #eaf1f9;
  border-color: #88b1d9;
}

.collection-main {
  max-width: 960px;
  padding-top: 28px;
  padding-bottom: 48px;
}

.collection-nav {
  color: var(--muted);
  font-size: 13px;
}

.collection-nav span {
  margin-left: 8px;
}

.collection-title {
  margin: 24px 0 32px;
  color: var(--blue-dark);
  font-size: clamp(23px, 4vw, 30px);
  line-height: 1.6;
}

.collection-return {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.section-title {
  display: block;
  position: relative;
  margin: 0 0 18px;
  padding: 0 0 13px 17px;
  border-bottom: 1px solid #cad9e8;
  color: var(--blue-dark);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.65;
  letter-spacing: 0.025em;
  overflow-wrap: anywhere;
}

.section-title::before {
  content: "";
  position: absolute;
  inset: 5px auto 17px 0;
  width: 4px;
  background: #1371cb;
  border-radius: 1px;
}

.section-title a {
  color: inherit;
  text-decoration: none;
}

.section-title a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.section-body {
  padding: 24px 26px;
  background: var(--paper);
  border: 1px solid #e3eaf1;
  border-radius: 4px;
  overflow-wrap: anywhere;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.app-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  overflow: hidden;
}

.app-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 24px;
  background: #edf3f8;
}

.app-visual:hover {
  background: #e5eef7;
}

.app-visual img {
  display: block;
  width: 320px;
  height: auto;
  box-shadow: 0 5px 14px rgb(29 56 84 / 10%);
}

.app-copy {
  min-width: 0;
  padding: 20px 19px 23px;
}

.app-heading {
  margin-bottom: 13px;
}

.app-title {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

.app-title a {
  color: var(--blue-dark);
  text-decoration: none;
}

.app-title a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
}

.platforms a {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid #cddded;
  border-radius: 3px;
  background: #f5f9fd;
  text-decoration: none;
  white-space: nowrap;
}

.platforms a:hover {
  background: #e6f0fa;
  border-color: #88b1d9;
}

.app-description {
  font-size: 14px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.app-card--featured {
  background: #fffdf5;
  border-color: #e8dfc5;
}

.app-card--featured .app-visual {
  background: #f8f0d7;
}

.app-card--featured .app-visual:hover {
  background: #f5e9c7;
}

.app-card--featured .app-copy {
  padding: 26px 28px;
}

.app-card--featured .app-title {
  margin-bottom: 13px;
  font-size: 24px;
  line-height: 1.6;
}

.app-card--featured .app-heading {
  margin-bottom: 18px;
}

.app-card--featured .app-description {
  font-size: 15px;
  line-height: 2;
}

.app-card--featured .platforms a {
  border-color: #d6dce5;
  background: #fff;
}

.legacy-content {
  display: flow-root;
}

.legacy-content img {
  margin-top: 18px;
  margin-right: 10px;
  margin-bottom: 3px;
  border-radius: 3px;
}

.legacy-content a:last-child img {
  margin-right: 0;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: center;
  gap: 28px;
}

.detail-image img {
  display: block;
  margin: 0;
}

#reversi .detail-layout {
  grid-template-columns: minmax(0, 1fr) 160px;
}

#kshogi .legacy-content img {
  width: 260px;
}

#blog-main .legacy-content img,
#blog-tech .legacy-content img {
  width: 320px;
}

#reversi .legacy-content img {
  width: 160px;
}

#fractal .legacy-content img {
  width: 120px;
}

#tsp .legacy-content img {
  width: 100px;
}

.release-note {
  color: #b43729;
}

#social .section-body {
  padding: 20px 24px;
}

.twitter-timeline {
  display: block;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.channel-card {
  min-width: 0;
}

.channel-card > b {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.8;
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #edf2f7;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.search-panel {
  padding: 22px 24px;
  margin-top: 14px;
  border: 1px solid #d2dfed;
  border-radius: 4px;
  background: #eaf1f9;
}

.search-panel > b {
  display: block;
  margin-bottom: 9px;
  color: var(--blue-dark);
}

.search-panel .gsc-control-searchbox-only {
  max-width: 100%;
}

.affiliate-note {
  margin-top: 22px;
  color: var(--muted);
  font-size: 12px;
}

.mobile-ad {
  display: none;
}

#right_area {
  font-size: 13px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.sidebar-card {
  margin-bottom: 26px;
  padding: 22px 21px;
  border: 1px solid #dce5ef;
  border-top: 3px solid #1c69b4;
  border-radius: 3px;
  background: #fff;
}

.sidebar-title {
  display: block;
  margin-bottom: 17px;
  color: var(--blue-dark);
  font-size: 13px;
  line-height: 1.8;
}

.sidebar-card > a {
  display: inline-block;
  max-width: 100%;
  margin-bottom: 12px;
}

.sidebar-title + br {
  display: none;
}

.sidebar-card img {
  display: inline-block;
  border-radius: 3px;
}

.sidebar-card > a img {
  width: 240px;
}

.sidebar-card p {
  margin: 0 0 24px;
}

.sidebar-card p:last-child {
  margin-bottom: 0;
}

.books-card p img {
  margin-bottom: 10px;
}

.sidebar-ad {
  min-width: 0;
  width: 300px;
  max-width: 100%;
  margin: 22px 0;
}

@media (max-width: 1180px) {
  .shell {
    width: calc(100% - 48px);
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 26px;
  }

  .app-grid {
    gap: 14px;
  }

  .app-copy {
    padding-inline: 15px;
  }

  .app-card--featured .app-copy {
    padding: 22px;
  }

  .app-card--featured .app-title {
    font-size: 21px;
  }

  .sidebar-card {
    padding-inline: 16px;
  }
}

@media (max-width: 1050px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 38px;
  }

  #right_area {
    display: block;
    padding-top: 30px;
    border-top: 1px solid #cbd9e8;
  }

  .sidebar-card {
    display: flow-root;
    margin: 0 0 24px;
    padding: 24px;
  }

  .sidebar-card > a {
    display: block;
    float: left;
    width: fit-content;
    margin: 0 24px 12px 0;
  }

  .sidebar-ad {
    margin: 0;
  }

  .books-card p {
    display: inline-block;
    width: calc(50% - 16px);
    margin-right: 12px;
    vertical-align: top;
  }

}

/* Retain the original ad placements: three desktop slots or one mobile slot. */
@media (max-width: 991px) {
  .sidebar-ad {
    display: none;
  }

  .mobile-ad {
    display: block;
    margin-top: 24px;
    text-align: center;
  }
}

@media (max-width: 700px) {
  .brand--title img {
    aspect-ratio: 3 / 1;
  }

  .modern-home {
    font-size: 14px;
  }

  .shell {
    width: calc(100% - 32px);
  }

  .site-header {
    padding-top: 16px;
  }

  .brand img {
    border-radius: 3px;
  }

  .page-layout {
    padding-top: 20px;
    padding-bottom: 36px;
  }

  .intro {
    padding: 16px 18px;
    margin-bottom: 30px;
    font-size: 13px;
  }

  .content-section {
    margin-bottom: 30px;
  }

  .section-title {
    font-size: 18px;
    padding-left: 14px;
    padding-bottom: 11px;
    margin-bottom: 15px;
  }

  .section-title::before {
    bottom: 15px;
  }

  .section-body {
    padding: 20px;
  }

  .detail-layout,
  #reversi .detail-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .app-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 15px;
  }

  .app-visual {
    padding: 20px 16px;
  }

  .app-copy {
    padding: 20px;
  }

  .app-title {
    font-size: 20px;
  }

  .app-description {
    font-size: 14px;
  }

  .app-card--featured .app-copy {
    padding: 20px;
  }

  .app-card--featured .app-title {
    font-size: 20px;
  }

  .app-card--featured .app-description {
    font-size: 14px;
    line-height: 1.95;
  }

  .channel-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 25px;
  }

  #right_area {
    display: block;
  }

  .sidebar-card {
    padding: 24px;
  }

  .sidebar-card > a {
    float: none;
    margin: 0 auto 12px;
  }

  .sidebar-title {
    font-size: 14px;
  }

  .books-card p {
    display: block;
    width: auto;
    margin-right: 0;
    text-align: center;
  }
}

@media (max-width: 460px) {
  .shell {
    width: calc(100% - 24px);
  }

  .site-header {
    padding-top: 12px;
  }

  .intro {
    padding: 14px 15px;
  }

  .app-copy,
  .app-card--featured .app-copy {
    padding: 20px 18px;
  }

  .app-title,
  .app-card--featured .app-title {
    font-size: 20px;
    line-height: 1.6;
  }

  .app-heading,
  .app-card--featured .app-heading {
    margin-bottom: 16px;
  }

  .platforms {
    gap: 5px;
    font-size: 12px;
  }

  .platforms a {
    padding: 3px 6px;
  }

  .app-description,
  .app-card--featured .app-description {
    font-size: 14px;
    line-height: 1.9;
  }

  .section-body,
  #social .section-body {
    padding: 18px;
  }

  .legacy-content img {
    margin-right: 4px;
  }

  .search-panel {
    padding: 18px;
  }

  .affiliate-note {
    font-size: 11px;
  }

  .mobile-ad {
    margin-inline: -12px;
    max-width: calc(100% + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .modern-home *,
  .modern-home *::before,
  .modern-home *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  .modern-home {
    background: #fff;
    color: #000;
  }

  .shell {
    width: 100%;
  }

  .page-layout {
    display: block;
  }

  .app-card,
  .sidebar-card,
  .channel-card {
    break-inside: avoid;
  }
}