:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-alt: #eef3f8;
  --text: #172033;
  --muted: #5b667a;
  --line: #dfe6ef;
  --accent: #2454a6;
  --accent-dark: #173a76;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.08);
  --radius: 18px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 32px, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 248, 251, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.site-title {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.95rem;
}

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

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

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at top left, rgba(36, 84, 166, 0.16), transparent 32rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 36px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

h1,
h2,
h3 {
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 1.12rem;
  max-width: 760px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 28px;
}

.tag-list span {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(23, 32, 51, 0.06);
}

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

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.profile-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.profile-card h2 {
  font-size: 1.4rem;
}

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

.profile-card dl {
  margin: 24px 0 0;
  display: grid;
  gap: 14px;
}

.profile-card div {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.profile-card dt {
  color: var(--muted);
  font-size: 0.82rem;
}

.profile-card dd {
  margin: 2px 0 0;
  font-weight: 700;
}

.section {
  padding: 64px 0;
}

.section.alt {
  background: var(--surface-alt);
}

.section-heading {
  max-width: 840px;
  margin-bottom: 28px;
}

.section-heading p {
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 12px 28px rgba(23, 32, 51, 0.05);
}

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

.pub-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 1.4rem;
}

.pub-list li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}

.venue {
  display: inline-flex;
  margin-right: 8px;
  margin-bottom: 4px;
  color: #fff;
  background: var(--accent-dark);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.78rem;
  font-weight: 800;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 42px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline div {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.timeline span {
  display: block;
  color: var(--accent);
  font-weight: 800;
  font-size: 0.92rem;
}

.timeline p {
  margin: 4px 0 0;
}

.compact-list {
  margin: 0;
  padding-left: 1.2rem;
}

.compact-list li {
  margin-bottom: 10px;
}

.footer {
  padding: 28px 0;
  background: #101827;
  color: #cbd5e1;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer p {
  margin: 0;
}

@media (max-width: 820px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .hero {
    padding-top: 48px;
  }

  .hero-grid,
  .cards,
  .two-column {
    grid-template-columns: 1fr;
  }

  .profile-card {
    padding: 22px;
  }
}