.concepts-page {
  padding-top: 0;
}

.concept-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 7rem;
  width: min(100% - 3rem, 88rem);
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.concept-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: clamp(10rem, 14vw, 12.5rem);
  transform: translate(-50%, -50%);
}

.concept-logo img {
  width: 100%;
}

.concept-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
  min-height: 74svh;
  width: min(100% - 3rem, 88rem);
  margin-inline: auto;
  padding-block: clamp(5rem, 10vw, 10rem);
}

.concept-intro .section-label {
  grid-column: 1 / -1;
}

.concept-intro h1 {
  max-width: 9ch;
  font-size: clamp(4rem, 10vw, 10rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.88;
}

.intro-copy {
  display: grid;
  gap: 1.5rem;
  max-width: 34rem;
}

.fixed-system {
  width: min(100% - 3rem, 88rem);
  margin-inline: auto;
  padding-block: clamp(4rem, 8vw, 8rem);
  border-top: 1px solid var(--line);
}

.fixed-system h2 {
  margin-top: 1rem;
  font-size: clamp(3rem, 7vw, 7rem);
  font-weight: 400;
  line-height: 0.92;
}

.fixed-system dl {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: clamp(3rem, 6vw, 6rem);
  border-top: 1px solid var(--blue);
  border-left: 1px solid var(--line);
}

.fixed-system dl div {
  min-height: 12rem;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.fixed-system dt,
.option dt {
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.fixed-system dd {
  margin-top: 2.5rem;
}

.concept-jump {
  position: sticky;
  z-index: 5;
  top: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--blue);
  background: var(--paper);
}

.concept-jump a {
  padding: 1.1rem;
  border-right: 1px solid var(--line);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
}

.option {
  display: grid;
  grid-template-columns: minmax(18rem, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 8vw, 8rem);
  width: min(100% - 3rem, 88rem);
  margin-inline: auto;
  padding-block: clamp(5rem, 10vw, 10rem);
  border-bottom: 1px solid var(--line);
}

.option header > p {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.option h2 {
  max-width: 7ch;
  margin-block: 1.25rem 2rem;
  font-size: clamp(3.75rem, 8vw, 8rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.9;
}

.option-body {
  align-self: end;
}

.option-thesis {
  max-width: 37rem;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  line-height: 1.45;
}

.option dl {
  margin-top: 3rem;
  border-top: 1px solid var(--blue);
}

.option dl div {
  display: grid;
  grid-template-columns: minmax(6rem, 0.34fr) minmax(0, 1fr);
  gap: 1rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 820px) {
  .concept-header {
    width: min(100% - 2rem, 42rem);
    min-height: 5.5rem;
  }

  .concept-header > .text-link {
    display: none;
  }

  .concept-logo {
    width: 9.25rem;
  }

  .concept-intro,
  .option {
    grid-template-columns: 1fr;
    width: min(100% - 2rem, 42rem);
  }

  .concept-intro {
    min-height: auto;
    padding-block: 6rem;
  }

  .concept-intro .section-label {
    grid-column: auto;
  }

  .concept-intro h1 {
    font-size: clamp(4rem, 20vw, 6.5rem);
  }

  .fixed-system {
    width: min(100% - 2rem, 42rem);
  }

  .fixed-system dl {
    grid-template-columns: 1fr;
  }

  .fixed-system dl div {
    min-height: 0;
  }

  .fixed-system dd {
    margin-top: 1rem;
  }

  .concept-jump {
    top: 0;
  }

  .concept-jump a {
    padding-inline: 0.45rem;
    font-size: 0.58rem;
  }

  .option {
    padding-block: 5rem;
  }

  .option h2 {
    font-size: clamp(3.75rem, 19vw, 6rem);
  }
}