:root {
  --green: #024731;
  --green-dark: #01331f;
  --green-soft: #e8f1ec;
  --text: #1c2a24;
  --muted: #5b6b63;
  --line: #d9e2dd;
  --bg: #ffffff;
  --bg-alt: #f6f9f7;
  --accent: #b8860b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --green: #6fcf9f;
    --green-dark: #a8e6c6;
    --green-soft: #17342a;
    --text: #e8f0ec;
    --muted: #9db0a6;
    --line: #2a3d34;
    --bg: #0f1a15;
    --bg-alt: #14231c;
    --accent: #e0b84a;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 17px;
  line-height: 1.75;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

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

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.brand img { width: 52px; height: 52px; border-radius: 6px; background: #fff; }
.brand-name { font-weight: 700; font-size: 1.05rem; line-height: 1.3; }
.brand-name small { display: block; font-weight: 400; color: var(--muted); font-size: 0.8rem; }
.site-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-nav a { text-decoration: none; color: var(--text); font-weight: 600; font-size: 0.95rem; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { border-bottom-color: var(--green); color: var(--green); }

/* Hero */
.hero { background: var(--green-soft); padding: 56px 0 48px; }
.hero h1 { margin: 0 0 8px; font-size: 2rem; line-height: 1.3; color: var(--green); }
.hero .tagline { margin: 0 0 4px; font-size: 1.15rem; }
.hero .tagline-ja { margin: 0; color: var(--muted); }

/* Sections */
main section { padding: 40px 0; border-bottom: 1px solid var(--line); }
main section:last-child { border-bottom: 0; }
h2 { margin: 0 0 16px; font-size: 1.5rem; color: var(--green); line-height: 1.4; }
h3 { margin: 28px 0 8px; font-size: 1.1rem; }
h1 [lang="ja"], h2 [lang="ja"] { display: inline-block; }
p { margin: 0 0 14px; }
.ja { color: var(--text); }
.ja-note { color: var(--muted); }

.page-title { padding: 40px 0 8px; }
.page-title h1 { margin: 0; font-size: 1.8rem; color: var(--green); }

/* Buttons and link cards */
.btn { display: inline-block; padding: 12px 22px; background: var(--green); color: #fff; text-decoration: none; border-radius: 6px; font-weight: 700; }
.btn:hover { background: var(--green-dark); color: #fff; }
@media (prefers-color-scheme: dark) {
  .btn { color: #0f1a15; }
  .btn:hover { color: #0f1a15; }
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 8px; }
.card { display: block; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg-alt); text-decoration: none; color: var(--text); }
.card:hover { border-color: var(--green); }
.card strong { display: block; color: var(--green); margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 0.9rem; }

/* Event list */
.events { list-style: none; margin: 0; padding: 0; }
.events li { padding: 14px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 120px 1fr; gap: 4px 16px; }
.events li:last-child { border-bottom: 0; }
.events time { color: var(--muted); font-variant-numeric: tabular-nums; }
.events .title { font-weight: 600; }
.events .venue { grid-column: 2; color: var(--muted); font-size: 0.92rem; }

/* Footer */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 0.9rem; }
.site-footer a { color: var(--muted); }

.form-frame { border: 1px solid var(--line); border-radius: 8px; padding: 8px; background: var(--bg); min-height: 360px; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero { padding: 36px 0 32px; }
  .hero h1 { font-size: 1.6rem; }
  .events li { grid-template-columns: 1fr; }
  .events .venue { grid-column: 1; }
}