.supporter-page {
  background: var(--white);
  color: var(--text-black);
}

.supporter-page .site-header {
  background: rgba(255, 255, 255, 0.98);
  color: var(--text-black);
}

.supporter-about {
  padding: 124px 0 128px;
  background: var(--white);
}

.supporter-page h3 > .block-reveal-content {
  padding-inline: 0.08em;
  background: var(--black);
  color: var(--white);
}

.supporter-section-heading {
  margin-bottom: 0;
}

.supporter-section-heading h1,
.supporter-section-heading h2,
.tier-heading h4 {
  margin: 0;
  font-family: var(--font-english);
  font-weight: 700;
  letter-spacing: 0;
}

.supporter-section-heading h1,
.supporter-section-heading h2 {
  font-size: 55px;
  line-height: 0.95;
}

.supporter-section-heading > p {
  margin: 18px 0 0 4px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.1em;
}

.supporter-about-copy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 72px;
  align-items: start;
  margin-top: 78px;
}

.supporter-about-copy h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.65;
}

.supporter-about-copy h2:only-child {
  grid-column: 1 / -1;
  max-width: 900px;
}

.supporter-about-copy > p {
  margin: 6px 0 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 2;
}

.supporter-benefit-section {
  margin-top: 74px;
}

.supporter-benefit-section > h2 {
  margin: 0 0 26px;
  font-size: 22px;
  font-weight: 700;
}

.supporter-benefits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(17, 17, 17, 0.15);
  border-bottom: 1px solid rgba(17, 17, 17, 0.15);
}

.benefit-item {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 20px;
  min-height: 176px;
  padding: 38px 26px 38px 0;
}

.benefit-item + .benefit-item {
  padding-left: 26px;
  border-left: 1px solid rgba(17, 17, 17, 0.12);
}

.benefit-item img {
  width: 100px;
  height: 100px;
  object-fit: cover;
}

.benefit-item h3 {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.benefit-item p {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.8;
}

.supporter-directory {
  padding: 132px 0 144px;
  background: var(--paper);
}

.supporter-tier {
  margin-top: 76px;
}

.supporter-tier + .supporter-tier {
  margin-top: 116px;
}

.tier-heading {
  display: flex;
  gap: 18px;
  align-items: center;
  margin-bottom: 32px;
}

.tier-heading h4 {
  font-size: 48px;
  line-height: 1;
}

.tier-heading p {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
}

.supporter-card-grid {
  display: grid;
}

.platinum-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 58px 28px;
}

.gold-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 22px;
}

.silver-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}

.bronze-grid {
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 16px;
}

.supporter-card,
.supporter-card-grid > img,
.supporter-card-grid > a {
  min-width: 0;
}

.supporter-card-grid > a {
  display: block;
  color: inherit;
}

.supporter-card-grid > a img {
  transition: all 0.3s;
}

.supporter-card-grid > a:hover img {
  opacity: 0.7;
}

.supporter-card > img,
.supporter-card-grid > img,
.supporter-card-grid > a > img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  background: var(--white);
  object-fit: cover;
}

.supporter-description {
  margin: 16px 0 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.9;
}

.supporter-grade,
.supporter-join {
  background: var(--deep-black);
  color: var(--white);
}

.supporter-grade {
  padding: 128px 0 136px;
}

.supporter-grade .supporter-section-heading {
  margin-bottom: 32px;
}

.grade-intro {
  margin: 0 0 58px;
  font-size: 14px;
  font-weight: 500;
  line-height: 2;
}

.grade-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.grade-card {
  min-height: 276px;
  padding: 32px 26px;
}

.grade-card + .grade-card {
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.grade-card h3 {
  margin: 0;
  font-family: var(--font-english);
  font-size: 30px;
  line-height: 1;
}

.grade-card > p {
  margin: 10px 0 34px;
  font-size: 13px;
}

.grade-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.7;
  list-style: none;
}

.grade-card li::before {
  margin-right: 0.5em;
  content: "・";
}

.supporter-join {
  padding: 128px 0 136px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.supporter-join .supporter-section-heading {
  margin-bottom: 64px;
}

.join-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
}

.join-step {
  min-height: 176px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.55);
}

.join-step > span {
  font-family: var(--font-english);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
}

.join-step h3 {
  margin: 22px 0 12px;
  font-size: 16px;
}

.join-step p {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.8;
}

.supporter-page .block-reveal-mask {
  background: var(--text-black);
}

.supporter-page .supporter-grade .block-reveal-mask,
.supporter-page .supporter-join .block-reveal-mask {
  background: var(--white);
}

@media (max-width: 1100px) {
  .supporter-about-copy {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
  }

  .supporter-benefits {
    grid-template-columns: 1fr;
  }

  .benefit-item,
  .benefit-item + .benefit-item {
    padding: 28px 0;
    border-left: 0;
  }

  .benefit-item + .benefit-item {
    border-top: 1px solid rgba(17, 17, 17, 0.12);
  }

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

  .silver-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .bronze-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .grade-card:nth-child(3) {
    border-left: 0;
  }

  .grade-card:nth-child(n + 3) {
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }
}

@media (max-width: 780px) {
  .supporter-about,
  .supporter-directory,
  .supporter-grade,
  .supporter-join {
    padding: 84px 0 92px;
  }

  .supporter-section-heading {
    margin-bottom: 0;
  }

  .supporter-section-heading h1,
  .supporter-section-heading h2 {
    font-size: 48px;
  }

  .supporter-about-copy {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 58px;
  }

  .supporter-about-copy h2 {
    font-size: 25px;
  }

  .supporter-about-copy h2 br {
    display: none;
  }

  .supporter-benefit-section {
    margin-top: 58px;
  }

  .supporter-benefit-section > h2 {
    font-size: 19px;
  }

  .benefit-item,
  .benefit-item + .benefit-item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 16px;
  }

  .benefit-item img {
    width: 88px;
    height: 88px;
  }

  .supporter-tier:first-child {
    margin-top: 84px;
  }

  .supporter-tier {
    margin-top: 58px;
  }

  .supporter-tier + .supporter-tier {
    margin-top: 84px;
  }

  .tier-heading h4 {
    font-size: 36px;
  }

  .platinum-grid,
  .gold-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 16px;
  }

  .silver-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .bronze-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
  }

  .supporter-description {
    font-size: 12px;
  }

  .grade-grid {
    grid-template-columns: 1fr;
  }

  .grade-card,
  .grade-card + .grade-card,
  .grade-card:nth-child(3) {
    min-height: 0;
    border-left: 0;
  }

  .grade-card + .grade-card {
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }

  .join-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 430px) {
  .platinum-grid {
    grid-template-columns: 1fr;
  }

  .supporter-section-heading h1,
  .supporter-section-heading h2 {
    font-size: 42px;
  }
}