body {
  background-color: #aa2824;
  background-image: url("img/bg.png");
  background-repeat: repeat;
  background-size: 384px 384px;
  background-position: top center;
}

.collab-main {
  max-width: none;
  margin: 0;
  padding: 0;
  display: block;
  background: transparent;
  border-radius: 0;
}

.collab-hero {
  max-width: 840px;
  margin: 0 auto;
  padding: 12px 16px 0;
}

.collab-hero img {
  display: block;
  width: 100%;
  height: auto;
}

.collab-menu {
  display: flex;
  justify-content: center;
  gap: 52px;
  margin: 0 auto;
  padding: 24px 16px 26px;
  background: #000;
  border-top: 2px solid rgba(255, 255, 255, 0.62);
  border-bottom: 2px solid rgba(255, 255, 255, 0.62);
}

.collab-menu a {
  color: #fff;
  font-family: "Zen Maru Gothic", system-ui, -apple-system, "Segoe UI",
               Roboto, "Noto Sans JP", sans-serif;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  transition: color 160ms ease;
}

.collab-menu a:hover,
.collab-menu a:active,
.collab-menu a.is-active {
  color: #ffd400;
}

.collab-section {
  max-width: 840px;
  margin: 0 auto;
  padding: 28px 16px 0;
}

.collab-section-separated {
  padding-top: 80px;
}

.collab-title {
  display: block;
  width: min(100%, 560px);
  height: auto;
  margin: 0 auto 20px;
}

.collab-all-chara {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
}

.collab-subtitle {
  display: block;
  width: min(100%, 560px);
  height: auto;
  margin: 32px auto 0;
}

.collab-character {
  margin: 8px auto 0;
  text-align: center;
}

.collab-character-art {
  display: block;
  width: min(100%, 360px);
  height: auto;
  margin: 0 auto;
}

.collab-character-name {
  display: block;
  width: min(90%, 340px);
  height: auto;
  margin: 12px auto 0;
}

.collab-character-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  margin: 12px auto 0;
}

.collab-character-meta .collab-character-name {
  width: min(72%, 340px);
  margin: 0;
}

.collab-sound-button {
  width: 56px;
  aspect-ratio: 1;
  margin-left: -18px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.collab-sound-button img {
  display: block;
  width: 100%;
  height: auto;
}

.collab-carousel {
  margin: 28px auto 0;
  text-align: center;
}

.collab-character-thumbs {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin: 0 auto 32px;
}

.collab-character-thumb {
  width: 108px;
  aspect-ratio: 1;
  padding: 3px;
  border: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  opacity: 0.72;
  transition: opacity 160ms ease, transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.collab-character-thumb.is-active {
  border-color: rgba(245, 245, 245, 0.92);
  box-shadow: 0 0 0 1px rgba(72, 72, 72, 0.55);
  opacity: 1;
  transform: translateY(-2px);
}

.collab-character-thumb img,
.collab-arrow img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.collab-carousel-stage {
  display: grid;
  grid-template-columns: 72px minmax(0, 390px) 72px;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.collab-carousel-art {
  display: block;
  width: 100%;
  height: auto;
}

.collab-arrow {
  width: 72px;
  aspect-ratio: 1;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.collab-arrow img {
  object-fit: contain;
}

.collab-carousel-four .collab-character-thumbs {
  gap: 18px;
}

.collab-carousel-four .collab-character-thumb {
  width: 96px;
}

.collab-character-thumb-placeholder,
.collab-carousel-art-placeholder,
.collab-arrow-placeholder,
.collab-character-name-placeholder {
  background: rgba(255, 255, 255, 0.14);
  border: 1px dashed rgba(255, 255, 255, 0.36);
}

.collab-character-thumb-placeholder {
  width: 108px;
  aspect-ratio: 1;
}

.collab-carousel-art-placeholder {
  width: 100%;
  aspect-ratio: 1;
}

.collab-arrow-placeholder {
  width: 72px;
  aspect-ratio: 1;
}

.collab-character-name-placeholder {
  width: min(90%, 340px);
  height: 76px;
  margin: 12px auto 0;
}

.collab-note {
  max-width: 560px;
  margin: 16px auto 0;
  color: rgba(255, 255, 255, 0.88);
  font-family: "Zen Maru Gothic", system-ui, -apple-system, "Segoe UI",
               Roboto, "Noto Sans JP", sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
}

.collab-monsters {
  display: flex;
  justify-content: center;
  align-items: end;
  gap: 56px;
  margin: 28px auto 0;
}

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

.collab-monster-arukikinoko {
  transform: translateX(56px);
}

.collab-image-slider {
  display: grid;
  grid-template-columns: 72px minmax(0, 460px) 72px;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 28px auto 0;
}

.collab-passage {
  display: block;
  width: 100%;
  height: auto;
}

.collab-content-placeholder {
  width: min(100%, 460px);
  min-height: 180px;
  margin: 24px auto 0;
  background: rgba(255, 255, 255, 0.14);
  border: 1px dashed rgba(255, 255, 255, 0.36);
}

.collab-video {
  width: min(100%, 640px);
  aspect-ratio: 16 / 9;
  margin: 24px auto 0;
  background: #000;
}

.collab-video iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.collab-event-rule,
.collab-login-bonus {
  display: block;
  width: min(100%, 640px);
  height: auto;
  margin: 24px auto 0;
}

.collab-login-slider {
  grid-template-columns: 72px minmax(0, 640px) 72px;
}

.collab-image-slider .collab-login-bonus {
  margin: 0;
}

.collab-info-link {
  margin: 24px auto 0;
  color: rgba(255, 255, 255, 0.92);
  font-family: "Zen Maru Gothic", system-ui, -apple-system, "Segoe UI",
               Roboto, "Noto Sans JP", sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  text-align: center;
}

.collab-info-link a {
  color: #fff4a8;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.collab-story {
  display: block;
  width: min(100%, 520px);
  height: auto;
  margin: 24px auto 0;
}

.collab-story-wide {
  width: min(100%, 640px);
}

.collab-site-button {
  display: block;
  width: min(100%, 360px);
  margin: 28px auto 0;
}

.collab-site-button img {
  display: block;
  width: 100%;
  height: auto;
}

.collab-copyright-bar {
  margin: 56px 0 0;
  padding: 22px 16px;
  background: rgba(72, 38, 29, 0.82);
  color: rgba(255, 255, 255, 0.94);
  font-family: "Zen Maru Gothic", system-ui, -apple-system, "Segoe UI",
               Roboto, "Noto Sans JP", sans-serif;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.6;
  text-align: center;
}

.collab-footer {
  margin: 72px 0 0;
  padding: 40px 16px 36px;
  background: #000;
  color: #fff;
  text-align: center;
}

.collab-footer-tagline,
.collab-footer-download,
.collab-footer-copy {
  margin: 0;
  font-family: "Zen Maru Gothic", system-ui, -apple-system, "Segoe UI",
               Roboto, "Noto Sans JP", sans-serif;
  font-weight: 700;
}

.collab-footer-tagline {
  font-size: 18px;
  line-height: 1.5;
}

.collab-footer-download {
  margin-top: 22px;
  font-size: 34px;
  line-height: 1.3;
}

.collab-store-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
  margin: 28px auto 0;
}

.collab-store-links a,
.collab-store-links img {
  display: block;
}

.collab-store-links img {
  height: 48px;
  width: auto;
}

.collab-footer-copy {
  margin-top: 48px;
  font-size: 18px;
}

[data-expandable-image] {
  cursor: zoom-in;
}

.collab-image-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 48px 16px;
  background: rgba(0, 0, 0, 0.86);
  touch-action: pinch-zoom;
}

.collab-image-modal[hidden] {
  display: none;
}

.collab-image-modal img {
  display: block;
  max-width: min(100%, 920px);
  max-height: 86vh;
  height: auto;
  cursor: zoom-out;
  touch-action: pinch-zoom;
}

.collab-image-modal-close {
  position: fixed;
  top: 14px;
  right: 14px;
  width: 44px;
  aspect-ratio: 1;
  padding: 0;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 36px;
  line-height: 1;
  cursor: pointer;
}

@media (min-width: 768px) {
  .collab-hero {
    padding: 16px 24px 0;
  }

  .collab-section {
    padding: 36px 24px 0;
  }

  .collab-section-separated {
    padding-top: 104px;
  }
}

@media (max-width: 767px) {
  .collab-menu {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
    padding: 18px 20px;
  }

  .collab-menu a {
    font-size: 15px;
    text-align: center;
  }

  .collab-character-thumbs {
    gap: 14px;
    margin-bottom: 24px;
  }

  .collab-character-thumb {
    width: 86px;
  }

  .collab-carousel-four .collab-character-thumbs {
    gap: 10px;
  }

  .collab-carousel-four .collab-character-thumb {
    width: 70px;
  }

  .collab-character-thumb-placeholder {
    width: 86px;
  }

  .collab-character-meta {
    gap: 0;
  }

  .collab-sound-button {
    width: 48px;
    margin-left: -14px;
  }

  .collab-carousel-stage {
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 8px;
    width: 100%;
  }

  .collab-arrow {
    width: 44px;
  }

  .collab-arrow-placeholder {
    width: 44px;
  }

  .collab-monsters {
    gap: 20px;
  }

  .collab-monsters img {
    max-width: 46%;
  }

  .collab-monster-arukikinoko {
    transform: translateX(28px);
  }

  .collab-image-slider {
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 8px;
    width: 100%;
  }

  .collab-content-placeholder {
    width: min(100%, 300px);
    min-height: 150px;
  }

  .collab-event-rule {
    width: min(100%, 340px);
  }

  .collab-login-slider {
    grid-template-columns: 44px minmax(0, 1fr) 44px;
  }

  .collab-note,
  .collab-copyright-bar {
    font-size: 13px;
  }

  .collab-footer {
    margin-top: 56px;
    padding: 32px 16px 30px;
  }

  .collab-footer-tagline {
    font-size: 14px;
  }

  .collab-footer-download {
    margin-top: 16px;
    font-size: 26px;
  }

  .collab-store-links {
    gap: 12px;
    margin-top: 22px;
  }

  .collab-store-links img {
    height: 40px;
  }

  .collab-footer-copy {
    margin-top: 36px;
    font-size: 15px;
  }

}