:root {
  --ink: #1a2744;
  --ink-dim: #5a6a88;
  --sakura: #ff9ec7;
  --sakura-deep: #ff5fa2;
  --cyan: #2bbcd8;
  --card: rgba(255, 255, 255, 0.66);
  --card-border: rgba(120, 150, 210, 0.4);
  --font: "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  --mono: "SFMono-Regular", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  min-height: 100%;
  background: radial-gradient(ellipse at 50% 0%, #f0f6ff 0%, #cddef6 42%, #a9c1e6 76%, #93acda 100%);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center;
  padding: 48px 20px 60px;
  overflow-x: hidden;
}

/* ---------- ヘッダー ---------- */
.menu-head { text-align: center; margin-bottom: 8px; z-index: 2; }
.menu-sakura { font-size: 58px; filter: drop-shadow(0 4px 14px rgba(255, 95, 162, 0.5)); animation: float 4s ease-in-out infinite; }
.menu-head h1 {
  font-size: clamp(32px, 6vw, 52px); letter-spacing: 0.06em; margin-top: 6px;
  background: linear-gradient(90deg, var(--sakura-deep), var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.menu-sub { font: 600 14px/1 var(--mono); letter-spacing: 0.26em; color: var(--sakura-deep); text-transform: uppercase; margin-top: 8px; }
.menu-lead { font-size: 15px; color: var(--ink-dim); margin-top: 16px; line-height: 1.7; max-width: 560px; }

/* ---------- カードグリッド ---------- */
.rounds {
  margin-top: 44px; width: 100%; max-width: 1040px; z-index: 2;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}

.round-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 20px; padding: 28px 24px; text-decoration: none; color: inherit;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 14px 40px rgba(60, 90, 160, 0.18);
  transition: transform .28s cubic-bezier(.34,1.4,.5,1), box-shadow .28s ease, border-color .28s ease;
  overflow: hidden; min-height: 260px;
}
.round-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 5px;
  background: linear-gradient(90deg, var(--accent, var(--sakura-deep)), var(--cyan));
}
.round-card.ready:hover {
  transform: translateY(-8px); border-color: var(--accent, var(--sakura-deep));
  box-shadow: 0 22px 54px rgba(60, 90, 160, 0.3);
}

.rc-num { font: 800 15px/1 var(--mono); letter-spacing: 0.16em; color: var(--accent, var(--sakura-deep)); }
.rc-title { font-size: 26px; font-weight: 800; margin: 14px 0 2px; }
.rc-en { font: 600 12px/1 var(--mono); letter-spacing: 0.24em; color: var(--ink-dim); text-transform: uppercase; }
.rc-desc { font-size: 13.5px; line-height: 1.75; color: #3f4f6e; margin-top: 16px; flex: 1; }

.rc-foot { margin-top: 20px; display: flex; align-items: center; gap: 8px; }
.rc-cta {
  font: 700 14px/1 var(--font); color: #fff;
  background: linear-gradient(90deg, var(--accent, var(--sakura-deep)), var(--cyan));
  padding: 11px 20px; border-radius: 10px;
}
.rc-badge {
  font: 700 12px/1 var(--mono); letter-spacing: 0.1em; color: var(--ink-dim);
  border: 1px dashed var(--card-border); padding: 9px 14px; border-radius: 10px;
}
.rc-emoji { position: absolute; right: 18px; bottom: 14px; font-size: 46px; opacity: 0.18; }

/* 準備中カード */
.round-card.soon { opacity: 0.72; cursor: default; }
.round-card.soon .rc-title, .round-card.soon .rc-desc { filter: grayscale(0.2); }

/* ---------- フッター ---------- */
.menu-foot { margin-top: 46px; font-size: 12.5px; color: var(--ink-dim); text-align: center; z-index: 2; }
.menu-foot a { color: var(--cyan); text-decoration: none; }
.menu-foot a:hover { text-decoration: underline; }

/* ---------- 舞う花びら ---------- */
.petal { position: fixed; top: -40px; font-size: 20px; pointer-events: none; z-index: 1; animation: fall linear infinite; opacity: 0.8; }

@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes fall {
  0% { transform: translateY(-40px) rotate(0deg); }
  100% { transform: translateY(105vh) rotate(320deg); }
}

@media (max-width: 780px) {
  .rounds { grid-template-columns: 1fr; max-width: 420px; }
  .round-card { min-height: auto; }
}