:root {
  --brand-blue: #1e5b8f;
  --brand-green: #65b88d;
  --brand-sky: #8fc7e8;
  --brand-yellow: #f7c948;
  --ink: #203449;
  --muted: #455c70;
  --line: #cfdee8;
  --pale-blue: #f2f8fc;
  --pale-green: #f0f8f4;
  --pale-yellow: #fff9e6;
  --white: #fff;
  --shell: 72rem;
  --gutter: clamp(1.25rem, 4.2vw, 3.5rem);
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", "Noto Sans CJK JP", sans-serif;
  color: var(--ink);
  line-height: 1.8;
  line-break: strict;
  overflow-wrap: anywhere;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, p, ul {
  margin: 0;
}

img {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

a {
  color: var(--brand-blue);
  text-underline-offset: 0.25em;
}

a:focus-visible {
  outline: 3px solid var(--brand-blue);
  outline-offset: 4px;
}

section[id], main[id] {
  scroll-margin-block-start: 1rem;
}

h1, h2, h3 {
  color: var(--brand-blue);
  font-weight: 700;
  line-height: 1.45;
}

h2 {
  font-size: clamp(1.55rem, 3.1vw, 2.25rem);
  text-wrap: balance;
}

h3 {
  font-size: clamp(1.14rem, 2.1vw, 1.4rem);
}

.shell {
  width: min(calc(100% - 2 * var(--gutter)), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  z-index: 1;
  inset-block-start: 0.5rem;
  inset-inline-start: var(--gutter);
  padding: 0.5rem 1rem;
  background: var(--white);
  translate: 0 -200%;
}

.skip-link:focus {
  translate: 0;
}

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.header-inner, .footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  padding-block: 0.8rem;
}

.brand, .site-nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
}

.brand img {
  inline-size: clamp(11.5rem, 19vw, 14.5rem);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  column-gap: clamp(0.65rem, 2vw, 1.8rem);
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover, .site-nav a:focus-visible {
  text-decoration: underline;
}

.hero {
  background: var(--pale-blue);
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-areas: "copy illustration" "action illustration";
  align-items: center;
  gap: 1.55rem clamp(2rem, 5vw, 4rem);
  padding-block: clamp(2rem, 5vw, 4.75rem);
}

.hero-copy {
  grid-area: copy;
}

.preview-label {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 700;
  margin-block-end: 0.9rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 3.65vw, 3.5rem);
  letter-spacing: -0.065em;
}

.hero h1 span {
  display: block;
}

.hero-lead {
  max-inline-size: 30em;
  margin-block-start: 1.25rem;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.85;
}

.primary-link {
  grid-area: action;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-block-size: 3rem;
  padding: 0.65rem 1.05rem 0.65rem 1.25rem;
  border-radius: 0.5rem;
  background: var(--brand-blue);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
}

.primary-link:hover {
  background: #164a76;
}

.section {
  padding-block: clamp(2.75rem, 6vw, 5.25rem);
}

.model-copy {
  margin-block-start: 1.5rem;
  padding: 1rem clamp(1rem, 3vw, 1.5rem);
  border-inline-start: 4px solid var(--brand-green);
  background: var(--pale-green);
}

.section-heading {
  margin-block-end: clamp(1.25rem, 2.5vw, 2rem);
}

.section-heading p {
  color: var(--muted);
  margin-block-start: 0.55rem;
}

.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.1vw, 1.65rem);
}

.entry {
  padding: clamp(1.15rem, 2.8vw, 2rem);
  border: 1px solid var(--line);
  border-block-start: 4px solid var(--brand-green);
  border-radius: 0.75rem;
  background: var(--pale-green);
}

.entry-practice {
  border-block-start-color: var(--brand-sky);
  background: var(--pale-blue);
}

.entry-list {
  display: grid;
  gap: 0.5rem;
  margin-block-start: 0.85rem;
  padding-inline-start: 1.2em;
}

.entry-list li::marker {
  color: var(--brand-blue);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-block-size: 2.75rem;
  margin-block-start: 0.75rem;
  font-weight: 700;
}

.category-section, .guide-section {
  background: var(--pale-blue);
}

.category {
  border-inline-start: 4px solid var(--brand-blue);
  padding-inline-start: 1rem;
}

.category:nth-child(2) {
  border-inline-start-color: var(--brand-green);
}

.category p, .value p, .material-copy h3 + p {
  margin-block-start: 0.55rem;
}

.hero-illustration {
  grid-area: illustration;
  inline-size: min(100%, 25rem);
  justify-self: center;
}

.intro-about {
  padding-block: clamp(1.75rem, 4vw, 3rem);
}

.intro-about h2 {
  margin-block-end: 1rem;
  font-size: clamp(1.25rem, 2.25vw, 1.75rem);
}

.about-copy p + p {
  margin-block-start: 0.85rem;
}

.approach {
  padding: 0.7rem 0.9rem;
  border-inline-start: 4px solid var(--brand-yellow);
  background: var(--pale-yellow);
}

.approach strong {
  color: var(--brand-blue);
}

.values-section {
  border-block: 1px solid var(--line);
}

.value {
  padding: 1rem clamp(0.85rem, 1.8vw, 1.4rem);
  border-block-start: 2px solid var(--line);
}

.set-note {
  margin-block-start: 1.2rem;
  padding: 0.8rem 1rem;
  border-radius: 0.5rem;
  background: var(--pale-blue);
}

.material {
  display: grid;
  grid-template-columns: minmax(9rem, 0.65fr) minmax(0, 1fr);
  max-inline-size: 47rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
}

.material-visual {
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: var(--pale-green);
}

.material-visual img {
  inline-size: 9rem;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 3px 10px #20344919;
}

.material-copy {
  align-self: center;
  padding: clamp(1.15rem, 2.5vw, 2rem);
}

.material-status {
  margin-block-end: 0.4rem;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 700;
}

.site-footer {
  border-block-start: 1px solid var(--line);
}

.footer-inner {
  padding-block: 1.25rem;
}

.footer-inner img {
  inline-size: 10rem;
}

.footer-inner small {
  color: var(--muted);
  font-size: 0.875rem;
}

@media (max-width: 48rem) {
  .hero-inner {
    grid-template-columns: 1fr;
    grid-template-areas: "copy" "illustration" "action";
    gap: 0.75rem;
  }

  .hero-illustration {
    inline-size: min(100%, 13rem);
  }

  .hero h1 {
    font-size: clamp(1.75rem, 8vw, 3.4rem);
  }
}

@media (max-width: 37rem) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 0.5rem 0.3rem;
  }

  .site-nav {
    column-gap: 0.9rem;
  }

  .site-nav a {
    font-size: 0.9rem;
  }

  .two-up {
    grid-template-columns: 1fr;
  }

  .material {
    grid-template-columns: minmax(5.5rem, 0.58fr) minmax(0, 1fr);
  }

  .material-visual {
    padding: 0.75rem;
  }

  .material-copy {
    padding: 0.85rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}