/* 記事ページ共通のスタイル（takarakuji-hokan/ など） */
:root{
  --bg:#fbf8f2; --surface:#ffffff; --ink:#2b2522; --muted:#6f655e; --line:#e8e0d4;
  --accent:#b8322a; --accent-ink:#ffffff; --gold:#b58a2c; --gold-soft:#f6edd8;
  --radius:18px; --shadow:0 6px 24px rgba(60,40,20,.08);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#1b1816; --surface:#25211e; --ink:#f2ece4; --muted:#b5aaa0; --line:#3a332e;
    --accent:#e0574d; --gold:#d9b25a; --gold-soft:#332a1a; --shadow:0 6px 24px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#1b1816; --surface:#25211e; --ink:#f2ece4; --muted:#b5aaa0; --line:#3a332e;
  --accent:#e0574d; --gold:#d9b25a; --gold-soft:#332a1a; --shadow:0 6px 24px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Zen Maru Gothic",system-ui,sans-serif;line-height:1.9;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
h1,h2,h3{font-family:"Shippori Mincho",serif;line-height:1.45;margin:0 0 .6em;word-break:auto-phrase;text-wrap:balance}

/* header */
header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}
.brand img{width:36px;height:36px;border-radius:50%}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.8em 1.5em;border-radius:999px;font-weight:700;text-decoration:none;border:0;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-sm{padding:.5em 1.1em;font-size:.9rem}

/* article */
.article{max-width:720px;margin:0 auto;padding:32px 16px 72px}
.crumbs{font-size:.8rem;color:var(--muted);margin-bottom:24px}
.crumbs a{text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.eyebrow{display:block;color:var(--gold);letter-spacing:.2em;font-size:.8rem;font-weight:700;margin-bottom:.4rem}
.article h1{font-size:clamp(1.6rem,4.6vw,2.3rem)}
.meta{font-size:.8rem;color:var(--muted);margin:0 0 28px}
.article h2{font-size:clamp(1.3rem,3.4vw,1.6rem);margin-top:56px;padding-bottom:.4em;border-bottom:2px solid var(--gold-soft)}
.article h3{font-size:1.1rem;margin-top:32px}
.article p,.article li{color:var(--ink)}
.article ul,.article ol{padding-left:1.4em}
.article li{margin-bottom:.4em}
.note{font-size:.85rem;color:var(--muted)}

.summary{background:var(--gold-soft);border-radius:var(--radius);padding:20px 24px;margin:0 0 8px}
.summary strong{display:block;font-family:"Shippori Mincho",serif;margin-bottom:.4em}
.summary ul{margin:0}

.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;margin:24px 0}
.toc strong{font-size:.9rem}
.toc ol{margin:.4em 0 0;font-size:.95rem}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}

.dirs{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}
.dir{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.dir h3{margin:0 0 .3em;font-size:1.05rem}
.dir p{margin:0;font-size:.92rem;color:var(--muted)}
@media (max-width:560px){.dirs{grid-template-columns:1fr}}

.table-wrap{overflow-x:auto;margin:20px 0}
.article table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.95rem}
.article th,.article td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left}
.article thead th{background:var(--gold-soft);font-weight:700}
.article td.num{font-variant-numeric:tabular-nums}
.article tr.hl td{font-weight:700}

.product{display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:24px 0;box-shadow:var(--shadow)}
.product .ph{background:#fff;border-radius:12px;aspect-ratio:1;overflow:hidden}
.product .ph img{width:100%;height:100%;object-fit:contain}
.product h3{margin:0 0 .3em}
.product p{margin:0 0 .8em;font-size:.95rem;color:var(--muted)}
.product .specs{font-size:.88rem;color:var(--muted);margin:0 0 .8em;padding-left:1.2em}
.product .specs li{color:var(--muted);margin-bottom:.1em}
.product .price{font-weight:700;font-size:1.2rem;color:var(--ink);margin-bottom:.8em}
@media (max-width:560px){.product{grid-template-columns:1fr}.product .ph{max-width:260px;margin:0 auto;width:100%}}

.minis{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}
.mini{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;display:flex;flex-direction:column}
.mini img{aspect-ratio:1;object-fit:contain;background:#fff;width:100%;height:auto}
.mini span{padding:8px 10px;font-size:.85rem;font-weight:700}
.mini:hover{border-color:var(--gold)}
@media (max-width:560px){.minis{grid-template-columns:1fr 1fr}}

.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 20px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"＋";color:var(--gold)}
.faq details[open] summary::after{content:"－"}
.faq details p{margin:0 0 16px;color:var(--muted)}

.disclaimer{font-size:.8rem;color:var(--muted);border-top:1px solid var(--line);margin-top:48px;padding-top:16px}
.related{margin-top:32px}
.related a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 18px;text-decoration:none;margin-bottom:10px}
.related a:hover{border-color:var(--gold)}

footer{padding:40px 0 100px;font-size:.85rem;color:var(--muted);border-top:1px solid var(--line)}
footer .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer nav a{margin-right:16px}

.sticky{position:fixed;left:0;right:0;bottom:0;z-index:30;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--line);display:none}
.sticky .btn{width:100%}
@media (max-width:760px){.sticky{display:block}}