/* minimal shared */
:root{--card:#fff;--border:#ffd1e3;--pink:#ff6fa8}
body{margin:0;font-family:system-ui, -apple-system, "Noto Sans JP", Meiryo, sans-serif;background:#fff7fb;color:#222}
header.pink{position:sticky;top:0;background:var(--pink);color:#fff;padding:.8rem;display:flex;align-items:center}
header.pink .center{margin:0 auto;font-weight:700}
.btn{border:1px solid #f5aac6;background:#fff;border-radius:999px;padding:.45rem .8rem}
.container{padding:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;margin:16px 0}
.muted{opacity:.7}