:root {
  --paper: rgba(255, 255, 255, 0.84);
  --paper-strong: rgba(255, 255, 255, 0.92);
  --ink: #1f2430;
  --muted: #556070;
  --accent: #2e7d5b;
  --accent-light: #3a9e72;
  --accent-deep: #1b4d3a;
  --accent-sub: #c4884f;
  --shadow-lg: 0 18px 48px rgba(27, 32, 43, 0.14);
  --shadow-sm: 0 8px 28px rgba(27, 32, 43, 0.10);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(240, 250, 244, 0.82), rgba(234, 239, 244, 0.78)),
    url("../img/white-waves.png");
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(36, 39, 46, 0.12), transparent 30%),
    url("../img/dark-honeycomb.jpg") top center / cover no-repeat;
  mix-blend-mode: multiply;
  opacity: 0.18;
}

.page-shell {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding: 64px 20px 80px;
}

.site-header {
  position: relative;
  padding: 40px 32px 32px;
  border: 1px solid rgba(30, 80, 55, 0.12);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--paper-strong), rgba(243, 250, 246, 0.88));
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent-light), var(--accent-sub));
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2 {
  margin: 0;
  font-family: "Zen Old Mincho", serif;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.15;
  letter-spacing: 0.03em;
  color: #1e3a2f;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s;
}

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

.content {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.card {
  padding: 28px 30px;
  border: 1px solid rgba(30, 80, 55, 0.1);
  border-radius: 14px;
  background: var(--paper);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
  transition: box-shadow 0.25s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

h2 {
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 4px solid var(--accent-light);
  font-size: 1.5rem;
  color: var(--accent-deep);
}

p {
  margin: 0;
  line-height: 1.85;
}

.member-list {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.member-list li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 1.2rem;
  line-height: 1.75;
}

.member-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-light);
}

.site-footer {
  margin-top: 48px;
  padding: 0 4px;
  text-align: center;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 28px 14px 44px;
  }

  .site-header,
  .card {
    padding: 22px 18px;
    border-radius: 14px;
  }

  p,
  .member-list li {
    font-size: 0.96rem;
  }
}