:root {
  --bg: #FBFAF6;
  --surface: #FFFFFF;
  --ink: #1D2420;
  --ink-soft: #56615A;
  --line: #E3E0D6;
  --green: #1F7A4D;
  --green-deep: #14553A;
  --green-tint: #E6F2E8;
  --amber: #C9831F;
  --amber-tint: #FBF0DC;
  --on-green: #FFFFFF;
  --radius: 14px;
  --font: "Inter", "Noto Sans JP", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121714;
    --surface: #1A211D;
    --ink: #E8ECE9;
    --ink-soft: #A6B1AA;
    --line: #2C3630;
    --green: #5CC08A;
    --green-deep: #8FD9AE;
    --green-tint: #1E2E25;
    --amber: #E8B15A;
    --amber-tint: #2E2618;
    --on-green: #0E1A13;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
}
a { color: var(--green); text-underline-offset: 3px; }
a:hover { color: var(--green-deep); }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; }
.brand-name { font-weight: 800; font-size: 17px; }
.brand-sub { font-size: 13px; color: var(--ink-soft); }
.nav-toggle { display: none; white-space: nowrap; flex-shrink: 0; font: inherit; font-size: 14px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 6px 14px; cursor: pointer; }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 2px 4px; padding-top: 0; padding-bottom: 10px; margin: 0 auto; }
.site-nav a { display: block; padding: 6px 12px; border-radius: 999px; text-decoration: none; color: var(--ink); font-size: 14px; font-weight: 500; }
.site-nav a:hover { background: var(--green-tint); }
.site-nav a[aria-current="page"] { background: var(--green); color: var(--on-green); }
@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .site-nav { display: none; border-top: 1px solid var(--line); }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; padding-top: 8px; }
  .brand-name { font-size: 15px; }
  .brand-sub { display: none; }
}

/* hero */
.hero { position: relative; overflow: hidden; background: linear-gradient(135deg, var(--green-tint), var(--bg) 60%, var(--amber-tint)); border-bottom: 1px solid var(--line); }
.hero .wrap { position: relative; padding-top: 72px; padding-bottom: 72px; }
.hero-cells { position: absolute; inset: 0; pointer-events: none; }
.hero-cells span { position: absolute; border-radius: 50%; opacity: .55; }
.hero-cells .c1 { width: 340px; height: 340px; right: -60px; top: -80px; background: radial-gradient(circle at 35% 35%, #fff 0 8%, rgba(46,139,87,.35) 9% 60%, rgba(46,139,87,0) 61%); }
.hero-cells .c2 { width: 220px; height: 220px; right: 180px; bottom: -70px; background: radial-gradient(circle at 40% 40%, #fff 0 9%, rgba(232,163,61,.38) 10% 60%, rgba(232,163,61,0) 61%); }
.hero-cells .c3 { width: 120px; height: 120px; right: 120px; top: 110px; background: radial-gradient(circle at 40% 40%, #fff 0 12%, rgba(27,94,59,.35) 13% 60%, rgba(27,94,59,0) 61%); }
.eyebrow { margin: 0 0 8px; font-size: 14px; font-weight: 700; letter-spacing: .12em; color: var(--green); }
.hero h1 { margin: 0; font-size: clamp(30px, 5.2vw, 52px); line-height: 1.25; font-weight: 800; letter-spacing: .01em; }
.hero .en { margin: 10px 0 0; font-size: clamp(14px, 1.8vw, 17px); color: var(--ink-soft); font-weight: 600; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.fact { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; min-width: 240px; }
.fact .label { display: block; font-size: 13px; color: var(--ink-soft); font-weight: 600; }
.fact .value { display: block; font-size: 20px; font-weight: 800; line-height: 1.45; }
.fact .value small { font-size: 14px; font-weight: 500; color: var(--ink-soft); }
@media (max-width: 760px) {
  .hero .wrap { padding-top: 44px; padding-bottom: 44px; }
  .hero-cells .c1 { width: 220px; height: 220px; right: -90px; top: -70px; }
  .hero-cells .c2, .hero-cells .c3 { display: none; }
  .fact { min-width: 0; width: 100%; }
}

/* page header */
.page-head { background: var(--green-tint); border-bottom: 1px solid var(--line); }
.page-head .wrap { padding-top: 40px; padding-bottom: 32px; }
.page-head h1 { margin: 0; font-size: clamp(26px, 4vw, 36px); line-height: 1.3; }

/* sections */
.section { padding: 48px 0; }
.section + .section { padding-top: 0; }
h2 { font-size: 22px; margin: 0 0 16px; padding-left: 14px; border-left: 5px solid var(--green); line-height: 1.4; }
h3 { font-size: 18px; margin: 28px 0 8px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .grid-2 { grid-template-columns: 1fr; } }

/* news */
.news { list-style: none; margin: 0; padding: 0; }
.news li { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.news li:first-child { padding-top: 0; }
.news time { color: var(--ink-soft); font-variant-numeric: tabular-nums; font-size: 15px; }
@media (max-width: 520px) { .news li { grid-template-columns: 1fr; gap: 0; } }

/* table */
.dl { width: 100%; border-collapse: collapse; }
.dl th, .dl td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.dl th { width: 9em; color: var(--ink-soft); font-weight: 700; white-space: nowrap; }
@media (max-width: 520px) {
  .dl th, .dl td { display: block; width: auto; padding: 6px 0; }
  .dl th { border-bottom: none; padding-top: 14px; }
}

/* dates */
.dates { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.dates li { display: flex; gap: 16px; align-items: baseline; padding: 12px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.dates .when { font-weight: 800; min-width: 10em; font-variant-numeric: tabular-nums; }
.dates .tag { font-size: 12px; color: var(--amber); border: 1px solid var(--amber); border-radius: 999px; padding: 0 8px; margin-left: 6px; white-space: nowrap; }
@media (max-width: 520px) { .dates li { flex-direction: column; gap: 2px; } }

/* preparing */
.preparing { text-align: center; padding: 48px 24px; background: var(--surface); border: 1px dashed var(--line); border-radius: var(--radius); }
.preparing .badge { display: inline-block; font-size: 13px; font-weight: 700; color: var(--amber); background: var(--amber-tint); border-radius: 999px; padding: 4px 14px; letter-spacing: .08em; }
.preparing p { margin: 14px 0 0; color: var(--ink-soft); }

.note { font-size: 14px; color: var(--ink-soft); }
.past { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.past li { padding: 14px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.past .meta { display: block; font-size: 14px; color: var(--ink-soft); }

/* footer */
.site-footer { margin-top: 56px; background: var(--surface); border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-soft); }
.footer-inner { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; padding-top: 32px; padding-bottom: 16px; }
.footer-inner p { margin: 0 0 8px; }
.footer-name { font-weight: 800; color: var(--ink); font-size: 16px; }
.footer-en { font-size: 13px; }
.footer-label { font-weight: 700; color: var(--ink); }
.copyright { font-size: 12px; padding-bottom: 24px; }
@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; } }