:root {
  color-scheme: light;
  --ink: #202123;
  --muted: #5f6662;
  --paper: #fbfbf7;
  --line: #d9ddd4;
  --soft: #eef3ef;
  --green: #2f6f5f;
  --blue: #276b85;
  --white: #ffffff;
  --shadow: 0 14px 34px rgba(32, 33, 35, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(47, 111, 95, 0.08), rgba(39, 107, 133, 0.07) 48%, rgba(255, 255, 255, 0) 78%),
    var(--paper);
  font-family:
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    "Noto Sans JP",
    system-ui,
    sans-serif;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--green);
  font-weight: 850;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
}

a:focus-visible {
  outline: 3px solid rgba(47, 111, 95, 0.3);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(217, 221, 212, 0.82);
  background: rgba(251, 251, 247, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: flex-end;
}

.nav a {
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}

.nav a:hover {
  color: var(--green);
}

.hero {
  width: min(1180px, calc(100% - 64px));
  min-height: 56vh;
  margin: 0 auto;
  display: grid;
  align-content: end;
  padding: 96px 0 68px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

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

h1 {
  max-width: 880px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero p:not(.eyebrow) {
  max-width: 720px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 18px;
}

.section {
  width: min(1180px, calc(100% - 64px));
  margin: 0 auto;
  padding: 40px 0 72px;
}

.section-heading {
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

.interest-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.interest-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.interest-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--soft);
}

.interest-card h3 {
  min-height: 58px;
  display: flex;
  align-items: center;
  padding: 14px 16px;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0;
}

.site-footer {
  width: min(1180px, calc(100% - 64px));
  min-height: 96px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .interest-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 0;
  }

  .site-header {
    position: static;
    display: block;
    padding: 16px 18px;
  }

  .nav {
    margin-top: 10px;
    justify-content: flex-start;
  }

  .hero,
  .section,
  .site-footer {
    width: min(100% - 36px, 1180px);
  }

  .hero {
    min-height: auto;
    padding: 64px 0 48px;
  }

  .interest-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .interest-card h3 {
    min-height: 54px;
    padding: 12px;
    font-size: 15px;
  }
}

@media (max-width: 460px) {
  .interest-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: block;
    padding: 24px 0;
  }

  .site-footer a {
    margin-top: 8px;
    display: inline-flex;
  }
}