:root {
  --paper: #f6f5ef;
  --ink: #243c33;
  --muted: #56685e;
  --green: #345442;
  --line: #d6ddd1;
  --soft: #e6eddf;
  --white: #fffef9;
  --orange: #b96538;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-underline-offset: 5px;
}
a:hover {
  color: #735028;
}
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 6px;
  border-radius: 4px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2,
h3 {
  line-height: 1.45;
  letter-spacing: 0.015em;
}
h2 {
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  margin-bottom: 24px;
}
h3 {
  font-size: 1.2rem;
}
p {
  margin-bottom: 1.15em;
}
ul,
ol {
  padding-left: 1.4em;
}
li + li {
  margin-top: 8px;
}
.wrap {
  width: min(1100px, calc(100% - 48px));
  margin-inline: auto;
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 24px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-decoration: none;
  white-space: nowrap;
}
.brand img {
  border-radius: 10px;
}
.site-header nav,
.site-footer nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}
.site-header nav a {
  font-size: 0.88rem;
  text-decoration: none;
}
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--white);
  padding: 10px;
  z-index: 10;
}
.skip-link:focus {
  top: 10px;
}
.eyebrow {
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.17em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  align-items: center;
  gap: 64px;
  padding: 58px 0 80px;
}
.hero h1 {
  font-size: clamp(2.6rem, 5.2vw, 4.25rem);
  letter-spacing: 0.025em;
  line-height: 1.4;
  margin-bottom: 24px;
}
.hero .lead {
  font-size: 1.02rem;
  color: var(--muted);
  max-width: 470px;
  line-height: 2;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--green);
  color: #fff;
  padding: 15px 23px;
  border-radius: 12px;
  font-weight: 650;
  text-decoration: none;
  min-height: 52px;
  text-align: center;
  line-height: 1.6;
}
.button:hover {
  background: #233f30;
  color: #fff;
}
.small {
  font-size: 0.8rem;
  color: var(--muted);
}
.hero .small {
  margin-top: 14px;
}
.hero-art {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 30px 35px 38px;
  background: #e2e9da;
  border-radius: 46% 46% 18px 18px;
}
.hero-art figure {
  margin: 0;
  max-width: 256px;
  transform: rotate(3deg);
}
.hero-art img {
  border-radius: 18px;
  box-shadow: 0 22px 50px #263e3024;
  background: #fff;
}
.hero-art figcaption {
  text-align: center;
  margin-top: 15px;
  font-size: 0.7rem;
  color: var(--muted);
}
.art-note {
  position: absolute;
  left: -25px;
  bottom: 74px;
  background: var(--white);
  padding: 12px 20px;
  box-shadow: 0 9px 30px #263e3012;
  border-radius: 12px;
  font-size: 0.85rem;
  transform: rotate(-5deg);
}
.art-note span {
  color: var(--orange);
  margin-right: 6px;
}
.trust-row {
  display: flex;
  gap: 20px;
  justify-content: space-between;
  border-block: 1px solid var(--line);
  padding: 22px 0;
  color: var(--muted);
  font-size: 0.85rem;
}
.trust-row span::before {
  content: "✓";
  margin-right: 8px;
  color: var(--green);
}
.section {
  padding-block: 84px;
}
.section-head {
  max-width: 650px;
  margin-bottom: 34px;
}
.section-head > p:not(.eyebrow) {
  color: var(--muted);
}
.grid-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature {
  padding: 28px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.feature .number {
  display: block;
  color: var(--orange);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  margin-bottom: 26px;
}
.feature p {
  font-size: 0.91rem;
  color: var(--muted);
  margin: 0;
}
.soft-section {
  background: #eaf0e4;
}
.guide-grid,
.plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.guide-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--white);
  border-radius: 18px;
  padding: 30px;
  text-decoration: none;
  border: 1px solid var(--line);
}
.guide-card:hover {
  border-color: var(--green);
  color: var(--ink);
}
.guide-card .tag {
  background: var(--soft);
  border-radius: 6px;
  padding: 2px 10px;
  font-size: 0.75rem;
  margin-bottom: 28px;
}
.guide-card h3 {
  font-size: 1.45rem;
}
.guide-card p {
  font-size: 0.92rem;
  color: var(--muted);
}
.guide-card .link-text {
  font-size: 0.85rem;
  text-decoration: underline;
  margin-top: auto;
}
.plan {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}
.plan.premium {
  background: var(--green);
  color: #fff;
}
.plan h3 {
  font-size: 1.6rem;
  margin-bottom: 10px;
}
.plan .price {
  font-size: 1.7rem;
  font-weight: 750;
  margin-bottom: 18px;
}
.plan .price span {
  font-size: 0.84rem;
  font-weight: 400;
}
.plan ul {
  font-size: 0.93rem;
}
.plan.premium .small {
  color: #e0e9df;
}
.plans + .small {
  margin-top: 20px;
}
.faq {
  max-width: 800px;
}
.faq details {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  font-weight: 650;
  padding-right: 15px;
}
.faq details p {
  color: var(--muted);
  margin: 16px 0 0;
  font-size: 0.93rem;
}
.closing {
  padding: 54px 24px;
  background: var(--soft);
  border-radius: 24px;
  text-align: center;
  margin-bottom: 80px;
}
.closing h2 {
  margin-bottom: 18px;
}
.closing p {
  color: var(--muted);
}
.closing .small {
  margin: 15px 0 0;
}
.site-footer {
  padding-block: 36px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.site-footer p {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 10px;
}
.site-footer nav {
  align-content: start;
  justify-content: flex-end;
  gap: 16px;
  font-size: 0.8rem;
}
.copyright {
  grid-column: 1/-1;
}
.article {
  max-width: 760px;
  padding-block: 42px 60px;
}
.breadcrumbs {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 36px;
}
.article h1 {
  font-size: clamp(2rem, 4.3vw, 3.1rem);
  margin-bottom: 24px;
}
.article .intro {
  font-size: 1.08rem;
  color: var(--muted);
}
.article h2 {
  font-size: 1.6rem;
  margin-top: 52px;
}
.article h3 {
  margin-top: 30px;
}
.article .eyebrow {
  margin-bottom: 15px;
}
.example {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  margin-block: 24px;
}
.example h3 {
  margin-top: 0;
}
.example dl {
  margin-bottom: 0;
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  font-size: 0.92rem;
}
.example dt {
  color: var(--muted);
}
.example dd {
  margin: 0;
}
.note {
  border-left: 3px solid #809879;
  padding: 10px 20px;
  background: #eaf0e4;
  color: var(--muted);
  font-size: 0.92rem;
}
.article .related {
  margin-top: 45px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.support-email {
  overflow-wrap: anywhere;
  font-size: 1.15rem;
}
.support .faq {
  margin-bottom: 40px;
}
@media (max-width: 760px) {
  .wrap {
    width: calc(100% - 36px);
  }
  .site-header {
    padding-block: 18px;
    gap: 16px;
  }
  .site-header nav {
    gap: 15px;
  }
  .site-header nav a {
    font-size: 0.8rem;
  }
  .brand {
    font-size: 1.17rem;
  }
  .brand img {
    width: 32px;
    height: 32px;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 32px 0 45px;
  }
  .hero h1 {
    font-size: clamp(2.2rem, 8.5vw, 3.4rem);
  }
  .hero .lead {
    max-width: 100%;
  }
  .hero-art {
    max-width: 350px;
    width: calc(100% - 32px);
    margin: auto;
    padding: 24px 32px;
  }
  .hero-art figure {
    max-width: 205px;
  }
  .art-note {
    left: -12px;
    bottom: 55px;
    font-size: 0.78rem;
  }
  .trust-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    font-size: 0.78rem;
  }
  .section {
    padding-block: 52px;
  }
  .grid-three {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature {
    padding: 24px;
  }
  .feature .number {
    margin-bottom: 14px;
  }
  .guide-grid,
  .plans {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .guide-card,
  .plan {
    padding: 26px;
  }
  .guide-card .tag {
    margin-bottom: 18px;
  }
  .closing {
    padding: 38px 22px;
    margin-bottom: 48px;
  }
  .site-footer {
    grid-template-columns: 1fr;
  }
  .site-footer nav {
    justify-content: flex-start;
  }
  .article {
    padding-top: 28px;
  }
  .article h2 {
    margin-top: 38px;
  }
  .example dl {
    grid-template-columns: 78px 1fr;
  }
}
@media (max-width: 360px) {
  .site-header nav {
    gap: 10px;
  }
  .site-header nav a {
    font-size: 0.73rem;
  }
  .hero h1 {
    font-size: 2.05rem;
  }
  .button {
    padding-inline: 16px;
    font-size: 0.9rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}