:root {
  --ink: #17202a;
  --paper: #f6f5f1;
  --blue: #1e3a75;
  --red: #d9472d;
  --orange: #ef9c34;
  --line: #d9d8d3;
  --muted: #697075;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", sans-serif;
}
a {
  color: inherit;
  text-decoration: none;
}
.shell {
  width: min(1280px, calc(100% - 48px));
  margin: auto;
}
.nav {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font:
    800 1.18rem/1 "Plus Jakarta Sans",
    sans-serif;
  letter-spacing: -0.07em;
}
.mark {
  display: grid;
  grid-template-columns: 10px 10px;
  gap: 3px;
  width: 23px;
  transform: rotate(-3deg);
}
.mark i {
  display: block;
  aspect-ratio: 1;
}
.mark i:nth-child(1) {
  background: var(--blue);
}
.mark i:nth-child(2) {
  background: var(--red);
}
.mark i:nth-child(3) {
  background: var(--orange);
}
.mark i:nth-child(4) {
  background: var(--ink);
}
.back,
.eyebrow,
.section-head,
.method-grid b,
.pricing span {
  font:
    500 0.72rem "DM Mono",
    monospace;
  letter-spacing: 0.08em;
}
.back:hover {
  color: var(--red);
}
.intro {
  border-top: 1px solid var(--ink);
  padding: 19px 0 88px;
}
.intro-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 6vw;
  align-items: end;
  padding-top: 94px;
}
.entry-geometry {
  position: absolute;
  right: 1vw;
  top: 6px;
  width: 180px;
  height: 148px;
  pointer-events: none;
}
.entry-geometry i {
  position: absolute;
  display: block;
}
.custom-entry i:nth-child(1) {
  left: 16px;
  bottom: 1px;
  width: 105px;
  height: 105px;
  border: 15px solid var(--blue);
  transform: rotate(45deg);
}
.custom-entry i:nth-child(2) {
  right: 0;
  top: 13px;
  width: 73px;
  height: 73px;
  background: var(--red);
  border-radius: 50%;
}
.custom-entry i:nth-child(3) {
  right: 40px;
  bottom: 2px;
  width: 34px;
  height: 122px;
  background: var(--orange);
}
.intro h1 {
  margin: 0;
  font:
    700 clamp(3.5rem, 9vw, 8.8rem)/0.82 "Plus Jakarta Sans",
    sans-serif;
  letter-spacing: -0.1em;
}
.intro h1 em {
  font-style: normal;
  color: var(--red);
}
.intro p {
  margin: 0;
  max-width: 440px;
  font-size: 1rem;
  line-height: 1.95;
}
.materials {
  border-top: 1px solid var(--ink);
}
.section-head {
  display: flex;
  justify-content: space-between;
  padding: 17px 0;
}
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-bottom: 0;
}
.method-grid article {
  min-height: 330px;
  padding: 24px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.method-grid article:last-child {
  border-right: 0;
}
.method-grid article:after {
  content: "";
  position: absolute;
  right: -28px;
  bottom: -28px;
  width: 125px;
  height: 125px;
  border: 18px solid var(--blue);
  transform: rotate(45deg);
  opacity: 0.17;
}
.method-grid article:nth-child(2):after {
  border-color: var(--red);
  border-radius: 50%;
  transform: none;
}
.method-grid article:nth-child(3):after {
  border-color: var(--orange);
  transform: skew(-15deg);
}
.method-grid b {
  color: var(--red);
}
.method-grid h2 {
  margin: 86px 0 14px;
  font:
    700 2rem/0.88 "Plus Jakarta Sans",
    sans-serif;
  letter-spacing: -0.075em;
}
.method-grid p {
  position: relative;
  z-index: 1;
  max-width: 280px;
  margin: 0;
  color: #35404a;
  font-size: 0.86rem;
  line-height: 1.85;
}
.process {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 8vw;
  padding: 110px 0;
}
.process h2 {
  margin: 20px 0 0;
  font-size: clamp(2rem, 3.5vw, 3.7rem);
  line-height: 1.2;
  letter-spacing: -0.07em;
}
.process ol {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
  list-style: none;
}
.process li {
  display: grid;
  grid-template-columns: 54px 1fr 1.3fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.process li b {
  color: var(--red);
  font:
    500 0.7rem "DM Mono",
    monospace;
}
.process li span {
  font-weight: 700;
}
.process li p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.8;
}
.pricing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  padding: 62px 0;
  border-top: 1px solid var(--ink);
}
.pricing h2 {
  margin: 18px 0 0;
  font-size: clamp(1.8rem, 3vw, 3.1rem);
  letter-spacing: -0.06em;
}
.pricing p {
  margin: 0;
  align-self: end;
  max-width: 460px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 2;
}
.cta {
  background: var(--red);
  color: #fff;
  padding: 68px 0 36px;
}
.cta .eyebrow:before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  margin-right: 10px;
  background: var(--orange);
}
.cta h2 {
  margin: 24px 0 54px;
  font:
    700 clamp(2.3rem, 5vw, 5rem)/1 "Plus Jakarta Sans",
    sans-serif;
  letter-spacing: -0.08em;
}
.cta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.55);
  padding-top: 20px;
}
.mail {
  font:
    600 clamp(1rem, 2vw, 1.65rem) "DM Mono",
    monospace;
}
.button {
  padding: 15px 20px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.78rem;
}
footer {
  padding: 22px 0;
  background: var(--ink);
  color: #bbc1c7;
  font:
    500 0.68rem "DM Mono",
    monospace;
}
footer .shell {
  display: flex;
  justify-content: space-between;
}
@media (max-width: 720px) {
  .shell {
    width: min(100% - 32px, 1280px);
  }
  .nav {
    height: 70px;
  }
  .back {
    font-size: 0.62rem;
  }
  .intro {
    padding-bottom: 60px;
  }
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-top: 60px;
  }
  .intro h1 {
    font-size: 3.9rem;
  }
  .entry-geometry {
    right: 0;
    top: -17px;
    transform: scale(0.65);
    transform-origin: top right;
  }
  .intro p {
    font-size: 0.94rem;
  }
  .method-grid {
    grid-template-columns: 1fr;
  }
  .method-grid article {
    min-height: 235px;
    border-right: 0;
  }
  .method-grid h2 {
    margin-top: 45px;
  }
  .process,
  .pricing {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 70px 0;
  }
  .process li {
    grid-template-columns: 42px 1fr;
  }
  .process li p {
    grid-column: 2;
  }
  .pricing p {
    font-size: 0.86rem;
  }
  .cta {
    padding-top: 50px;
  }
  .cta-row,
  footer .shell {
    flex-direction: column;
    align-items: flex-start;
  }
  .mail {
    word-break: break-all;
  }
}