/* 月窓ランディング ─ 拡張機能と同じ「濃藍の夜」の世界。自己完結CSS(サブドメイン化してもリンク切れしない) */
:root {
  --night-deep: #070b18;
  --night-soft: #121a30;
  --text: #cdd3e4;
  --text-dim: #848da8;
  --moonlight: #efe9d6;
  --gold: #cbb782;
  --serif: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: radial-gradient(120% 90% at 50% 18%, var(--night-soft), var(--night-deep) 78%) var(--night-deep);
  color: var(--text);
  font-family: var(--sans);
  line-height: 2;
  letter-spacing: 0.05em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; border-bottom: 1px solid rgba(203,183,130,0.5); text-decoration: none; padding-bottom: 1px; }
a:hover { color: var(--gold); border-color: var(--gold); }
a:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

.page { max-width: 720px; margin: 0 auto; padding: 40px clamp(20px, 6vw, 48px) 64px; }
.crumb { font-size: 0.8rem; letter-spacing: 0.2em; color: var(--text-dim); }
.crumb a { border-bottom: none; }

.hero { text-align: center; padding: clamp(48px, 10vh, 96px) 0 40px; }
.title {
  font-family: var(--serif);
  font-size: clamp(3rem, 9vw, 4.4rem);
  font-weight: 500;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  color: var(--moonlight);
}
.yomi { color: var(--text-dim); font-size: 0.82rem; letter-spacing: 0.24em; margin-top: 0.8em; }
.lead { margin-top: 2.4em; font-size: 0.95rem; color: var(--text); }
.cta { margin-top: 2.4em; }
.badge {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  border: 1px solid rgba(203,183,130,0.5);
  border-radius: 2px;
  padding: 8px 18px;
}

/* ── 今夜の月の小窓(スクリーンショットの代わりに、本物) ── */
.moon-window {
  position: relative;
  margin: 24px auto 10px;
  width: min(340px, 100%);
  border: 1px solid rgba(203,183,130,0.35);
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(to bottom, #060a16, #0e1529 62%, #141b31);
  box-shadow: inset 0 2px 16px rgba(0,0,0,0.5), 0 14px 40px rgba(0,0,0,0.45);
}
.moon-window canvas { display: block; width: 100%; height: auto; }
.window-phase {
  position: absolute;
  top: 20px;
  right: 16px;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.4em;
  color: var(--moonlight);
  text-shadow: 0 0 12px rgba(239,233,214,0.35);
}
:root:lang(en) .window-phase,
html[lang="en"] .window-phase {
  font-size: 0.9rem;
  letter-spacing: 0.28em;
  font-style: italic;
}
.window-caption {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  margin-bottom: 56px;
}

.features dl { display: grid; grid-template-columns: 1fr 1fr; gap: 32px clamp(24px, 5vw, 48px); }
.f dt {
  font-family: var(--serif);
  font-size: 1.05rem;
  letter-spacing: 0.2em;
  color: var(--moonlight);
  margin-bottom: 0.6em;
}
.f dd { font-size: 0.88rem; color: var(--text-dim); }

.foot {
  margin-top: 72px;
  padding-top: 28px;
  border-top: 1px solid rgba(203,183,130,0.2);
  color: var(--text-dim);
  font-size: 0.85rem;
}
.foot p { margin-bottom: 0.6em; }

@media (max-width: 560px) { .features dl { grid-template-columns: 1fr; } }

/* ---------- 言語切り替え ---------- */
.topbar { display: flex; justify-content: space-between; align-items: baseline; }
.lang-btn {
  appearance: none;
  background: transparent;
  border: 1px solid rgba(203, 183, 130, 0.4);
  border-radius: 2px;
  color: var(--text-dim);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s;
}
.lang-btn:hover { color: var(--text); border-color: var(--gold); }
.lang-btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }