:root {
  color-scheme: light;
  --bg: #f7f4ee;
  --surface: #ffffff;
  --surface-soft: #f1eee7;
  --ink: #202225;
  --muted: #61666d;
  --line: #ddd7cc;
  --accent: #0d6f7d;
  --accent-dark: #084b55;
  --link: #0a5e77;
  --link-hover: #8a3d1f;
  --shadow: 0 18px 45px rgba(48, 45, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(247, 244, 238, 0.96)),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Yu Gothic", "YuGothic",
    "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.75;
}

a {
  color: var(--link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--link-hover);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(221, 215, 204, 0.85);
  background: rgba(247, 244, 238, 0.92);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
}

.brand {
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.94rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--accent-dark);
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 2rem;
  align-items: center;
  min-height: calc(100vh - 5.5rem);
  padding: 2rem 0 3rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--accent-dark);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  max-width: 13ch;
  font-size: clamp(2.3rem, 6vw, 4.8rem);
}

.name-ja {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.42em;
  font-weight: 600;
  color: var(--muted);
}

.lead {
  max-width: 44rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(48, 45, 39, 0.08);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.portrait {
  aspect-ratio: 1125 / 944;
  width: min(100%, 280px);
  height: auto;
  justify-self: end;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.section {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-height: 100%;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 28px rgba(48, 45, 39, 0.06);
}

.card h3 {
  margin-bottom: 0.55rem;
  font-size: 1.08rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card .card-action {
  margin-top: 0.9rem;
}

.list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.meta {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.course-grid a {
  display: block;
  min-height: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
}

.course-grid a:hover {
  border-color: rgba(13, 111, 125, 0.55);
  color: var(--accent-dark);
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.4rem 1.25rem;
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .portrait {
    justify-self: start;
    width: min(72vw, 260px);
  }

  .grid,
  .course-grid {
    grid-template-columns: 1fr;
  }
}