:root {
  --navy: #0f172a;
  --dark: #1e293b;
  --blue: #2563eb;
  --gold: #f59e0b;
  --green: #059669;
  --gray: #64748b;
  --light: #f8fafc;
  --white: #ffffff;
  --border: #e2e8f0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif; background: var(--light); color: var(--dark); line-height: 1.75; }
a { color: var(--blue); text-decoration: none; }
.navbar { background: var(--navy); padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 100; }
.nav-logo { color: var(--white); font-weight: 900; font-size: 1.05rem; }
.nav-logo span { color: var(--gold); }
.nav-links { display: flex; gap: 12px; align-items: center; }
.nav-links a { color: rgba(255,255,255,0.8); font-size: 0.88rem; padding: 6px 12px; border-radius: 6px; transition: background .2s; }
.nav-links a:hover { background: rgba(255,255,255,0.1); color: #fff; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 8px; font-weight: 700; font-size: 0.92rem; cursor: pointer; border: none; transition: all .2s; font-family: inherit; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: #d97706; }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }
.card { background: var(--white); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: box-shadow .2s; }
.card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
.badge { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 0.72rem; font-weight: 700; }
.badge-free { background: rgba(5,150,105,0.12); color: var(--green); }
.badge-locked { background: rgba(100,116,139,0.12); color: var(--gray); }
.badge-vol { background: rgba(37,99,235,0.1); color: var(--blue); }