/* ウェルカム画面（/welcome）専用。未ログインで開く 1 枚。外部フォント・CDN は使わない。
   このファイルと hero.* と index.html だけが匿名で配られる（トップ用の assets/site.css は認証後）。 */
:root {
  --bg: #eef3ea;
  --bg-soft: #f8fbf4;
  --fg: #1c2a22;
  --sub: #4a5c50;
  --green: #2a6b47;       /* 強調語（明るい地の上） */
  --oak: #8a521c;
  --board: #1d3a2c;
  --yellow: #f0d84a;
  --focus: #0b57d0;
  --f-round: ui-rounded, "Hiragino Maru Gothic ProN", "Hiragino Sans", "BIZ UDPGothic", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1913; --bg-soft: #17251c; --fg: #eef3ea; --sub: #b4c4b6; --green: #f0d84a; --oak: #e3b676; --focus: #8ab4ff; }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh; min-height: 100svh;
  background: radial-gradient(120% 70% at 50% 0%, var(--bg-soft) 0%, var(--bg) 62%);
  color: var(--fg); font: 400 16px/1.7 var(--f-round); overflow-x: hidden;
}
.welcome {
  min-height: 100vh; min-height: 100svh; max-width: 1080px; margin: 0 auto; padding: 28px 16px 36px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px; text-align: center;
}
.eyebrow { margin: 0; color: var(--oak); font: 800 14px/1.5 var(--f-round); letter-spacing: .11em; }
h1 { margin: 0; font: 800 clamp(30px, 8.4vw, 56px)/1.3 var(--f-round); letter-spacing: -.01em; word-break: auto-phrase; text-wrap: balance; }
h1 span { color: var(--green); }

.hero { display: block; width: min(100%, 560px); margin: 20px auto 0; animation: rise .7s .15s both ease-out; }
.hero img { display: block; width: 100%; height: auto; }

.door {
  display: inline-flex; align-items: center; justify-content: center; gap: 12px; width: min(100%, 420px); min-height: 60px;
  padding: 14px 22px; border-radius: 999px; background: var(--board); color: #fff; text-decoration: none;
  font: 800 clamp(16px, 4.6vw, 19px)/1.35 var(--f-round); box-shadow: 0 10px 26px rgba(20, 40, 30, .28);
  transition: transform .15s, box-shadow .15s;
}
.door:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(20, 40, 30, .32); }
.door:active { transform: translateY(0); }
.door:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.door svg { flex: none; width: 26px; height: 26px; color: var(--yellow); transform-origin: 50% 20%; animation: jingle 4s 1.4s ease-in-out infinite; }
@media (prefers-color-scheme: dark) { .door { background: var(--yellow); color: #1c1c10; } .door svg { color: #1c1c10; } }

@keyframes rise { from { opacity: 0; transform: translateY(10px) } to { opacity: 1; transform: none } }
@keyframes jingle { 0%, 82%, 100% { transform: rotate(0) } 86% { transform: rotate(-16deg) } 90% { transform: rotate(14deg) } 94% { transform: rotate(-8deg) } 97% { transform: rotate(4deg) } }

@media (min-width: 760px) { .welcome { gap: 26px; padding-top: 44px; } .sp { display: none; } .hero { margin-top: 24px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }