:root {
  --ink: #17231f;
  --ink-soft: #51625c;
  --paper: #fbfaf6;
  --paper-alt: #f0ede4;
  --line: #d8d2c2;
  --accent: #ae5b3e;
  --accent-dark: #733b2c;
  --moss: #4b6a56;
  --sage: #d8e0d2;
  --gold: #d69c4b;
  --white: #fffdf8;
  --shadow: 0 24px 60px rgba(38, 35, 28, 0.14);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: radial-gradient(circle at 1px 1px, rgba(23,35,31,.10) 1px, transparent 0);
  background-size: 28px 28px;
  z-index: -2;
}
a { color: inherit; }
img { max-width: 100%; }
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  border-radius: 999px;
}
.skip-link:focus { top: 16px; }
.container {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}
.section-pad { padding: 92px 0; }
.section-pad.slim { padding: 78px 0; }
.alt { background: linear-gradient(180deg, rgba(216,224,210,0.42), rgba(240,237,228,0.76)); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 250, 246, 0.88);
  border-bottom: 1px solid rgba(216, 210, 194, 0.8);
  backdrop-filter: blur(16px);
}
.nav {
  width: min(100% - 32px, 1220px);
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  position: relative;
  box-shadow: inset 0 0 0 8px var(--sage);
  background: var(--gold);
}
.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: var(--ink);
}
.brand-mark::before { width: 18px; height: 2px; left: 6px; top: 15px; transform: rotate(-28deg); }
.brand-mark::after { width: 2px; height: 14px; left: 15px; top: 8px; transform: rotate(24deg); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 650;
  font-size: 0.94rem;
  padding: 10px 12px;
  border-radius: 999px;
}
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
  background: rgba(174, 91, 62, 0.10);
}
.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}
.hero {
  min-height: 720px;
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
  background: radial-gradient(circle at 20% 10%, rgba(214,156,75,.25), transparent 32%),
              radial-gradient(circle at 82% 14%, rgba(75,106,86,.28), transparent 30%),
              linear-gradient(135deg, var(--paper) 0%, #ece7dc 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) 390px;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero h1 {
  margin: 0;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(4rem, 10vw, 8.2rem);
  line-height: 0.88;
  letter-spacing: -0.085em;
  max-width: 820px;
}
.eyebrow,
.section-kicker,
.card-label {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.subtitle {
  font-size: clamp(1.35rem, 2.6vw, 2.3rem);
  margin: 20px 0 0;
  font-weight: 750;
  letter-spacing: -0.045em;
  color: var(--moss);
}
.lede {
  max-width: 760px;
  font-size: clamp(1.1rem, 1.5vw, 1.32rem);
  color: var(--ink-soft);
  margin: 28px 0 0;
}
.lede-small {
  font-size: 1.12rem;
  color: var(--ink-soft);
  margin-top: 18px;
}
.cta-row {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--ink);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(23,35,31,.13); }
.button.primary { background: var(--ink); color: var(--white); }
.button.secondary { background: rgba(255,255,255,.45); }
.button.disabled {
  pointer-events: none;
  border-color: var(--line);
  color: var(--ink-soft);
  background: rgba(255,255,255,.48);
}
.hero-card,
.notice-card,
.footer-note,
.person-card {
  background: rgba(255,253,248,0.78);
  border: 1px solid rgba(216, 210, 194, 0.78);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.hero-card {
  padding: 28px;
  backdrop-filter: blur(12px);
}
.facts {
  display: grid;
  gap: 16px;
  margin: 0;
}
.facts div {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.facts dt {
  color: var(--ink-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 800;
}
.facts dd {
  margin: 4px 0 0;
  font-weight: 750;
}
.muted { color: var(--ink-soft); }
.hero-bg span {
  position: absolute;
  display: block;
  border: 1px solid rgba(75,106,86,.28);
  border-radius: 50%;
  animation: float 14s ease-in-out infinite;
}
.orbit-a { width: 420px; height: 420px; right: 6vw; top: 120px; }
.orbit-b { width: 220px; height: 220px; right: 18vw; bottom: 100px; animation-delay: -5s; }
.orbit-c { width: 120px; height: 120px; left: 7vw; bottom: 110px; animation-delay: -8s; }
@keyframes float { 0%,100%{ transform: translateY(0) rotate(0deg); } 50%{ transform: translateY(-20px) rotate(6deg); } }
.two-col {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 64px;
  align-items: start;
}
h2 {
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(2.35rem, 4.5vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.07em;
  margin: 0;
}
.rich-text p { margin: 0 0 18px; color: var(--ink-soft); font-size: 1.06rem; }
.topic-grid {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.topic-grid span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.56);
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 0.92rem;
}
.section-head {
  max-width: 740px;
  margin-bottom: 40px;
}
.section-head p:not(.section-kicker) { color: var(--ink-soft); font-size: 1.08rem; }
.schedule {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.schedule li {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 26px;
  padding: 22px 24px;
  background: rgba(255,253,248,0.68);
  border: 1px solid rgba(216, 210, 194, .86);
  border-radius: var(--radius-md);
}
.schedule time {
  color: var(--accent-dark);
  font-weight: 900;
  letter-spacing: -0.02em;
}
.schedule h3,
.person-card h3,
.notice-card h3,
.footer-note h3 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.2;
}
.schedule p,
.person-card p,
.notice-card p,
.footer-note p { margin: 8px 0 0; color: var(--ink-soft); }
.cards {
  display: grid;
  gap: 18px;
}
.cards.three { grid-template-columns: repeat(3, 1fr); }
.person-card {
  padding: 24px;
  box-shadow: 0 14px 34px rgba(38, 35, 28, 0.09);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.person-card.compact { min-height: 120px; }
.person-card.compact .avatar { width: 160px; height: 160px; margin-bottom: 16px; }
.avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sage), #fff, rgba(214,156,75,.5));
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-weight: 900;
  color: var(--accent-dark);
  margin-bottom: 25px;
}
.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: inherit; /* 親の角丸を引き継ぐ */
  display: block;
}
.role {
  color: var(--moss) !important;
  font-weight: 800;
}
.submission-block { align-items: center; }
.notice-card { padding: 28px; }
.submission-cta {
  display: flex;
  width: fit-content;
  margin: 4px auto 24px;
  background: rgba(214, 156, 75, 0.22);
  color: var(--accent-dark);
  border-color: rgba(214, 156, 75, 0.55);
}
.submission-cta:hover { background: rgba(214, 156, 75, 0.34); }
.clean-list {
  padding: 0;
  margin: 18px 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.clean-list li {
  position: relative;
  padding-left: 28px;
}
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: inset 0 0 0 4px var(--white);
  border: 1px solid var(--accent);
}
.organizers-grid { grid-template-columns: repeat(4, 1fr); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: 50px;
  align-items: center;
}
.contact-line a {
  color: var(--accent-dark);
  font-weight: 850;
}
.footer-note { padding: 28px; }
.footer-note a { color: var(--accent-dark); font-weight: 850; }
.site-footer {
  padding: 28px 0;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.footer-grid p { margin: 0; }
.footer-grid a { text-decoration: none; font-weight: 800; }

@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .hero-grid,
  .two-col,
  .contact-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-card { max-width: 560px; }
  .cards.three,
  .organizers-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, var(--max)); }
  .section-pad { padding: 68px 0; }
  .hero h1 { font-size: clamp(3.35rem, 17vw, 5rem); }
  .schedule li { grid-template-columns: 1fr; gap: 8px; }
  .cards.three,
  .organizers-grid { grid-template-columns: 1fr; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
}