:root{
  --bg:#f6f7f9;--surface:#fff;--text:#1c2430;--muted:#5d6878;--line:#e2e6ec;
  --accent:#2457d6;--accent-ink:#fff;--soft:#eef0f3;--ok:#1a8a4c;--ok-bg:#e8f6ee;--ng:#b7791f;--ng-bg:#fdf3e1;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#11151b;--surface:#1a2029;--text:#e8ecf2;--muted:#9aa5b5;--line:#2b3340;
  --accent:#6f95ff;--accent-ink:#0c1220;--soft:#232a35;--ok:#5fd08f;--ok-bg:#16301f;--ng:#e8b457;--ng-bg:#33270f;
}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP","Yu Gothic UI",Meiryo,sans-serif;line-height:1.8;-webkit-text-size-adjust:100%}
.wrap{max-width:820px;margin:0 auto;padding:0 16px}
header.site{padding:18px 0;font-weight:700;display:flex;gap:18px;flex-wrap:wrap;align-items:baseline}
header.site a{color:inherit;text-decoration:none}
header.site nav a{font-weight:400;font-size:.9rem;color:var(--muted);margin-right:14px}
a{color:var(--accent)}
h1{font-size:clamp(1.4rem,4.4vw,2rem);line-height:1.4;margin:20px 0 12px}
h2{font-size:1.25rem;margin:36px 0 8px;line-height:1.5}
h3{font-size:1.02rem;margin:22px 0 6px}
.lead{color:var(--muted);margin:0 0 20px}
.note{font-size:.85rem;color:var(--muted);margin:8px 0 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;margin:20px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px 18px}
.full{grid-column:1/-1}
label{display:block;font-size:.9rem;font-weight:700;margin-bottom:4px}
label small{font-weight:400;color:var(--muted);margin-left:6px}
input[type=text],input[type=url],input[type=email],input[type=tel],input[type=time],select,textarea{
  width:100%;padding:11px 12px;font-size:1rem;font-family:inherit;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
textarea{resize:vertical;min-height:84px}
fieldset{border:0;margin:0;padding:0}
legend{font-size:.9rem;font-weight:700;margin-bottom:6px;padding:0}
.checks{display:flex;flex-wrap:wrap;gap:6px 16px}
.checks label,.radio label{display:flex;align-items:center;gap:6px;font-weight:400;font-size:.95rem;margin:0}
.radio{display:grid;gap:8px}
button{padding:12px 20px;font-size:1rem;font-weight:700;border:0;border-radius:10px;background:var(--accent);color:var(--accent-ink);cursor:pointer}
.output{width:100%;min-height:260px;font-family:Consolas,Menlo,monospace;font-size:.85rem;line-height:1.55;white-space:pre;overflow:auto}
.meter{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 0;padding:0;list-style:none}
.meter li{font-size:.8rem;font-weight:700;padding:2px 10px;border-radius:999px}
.meter .on{color:var(--ok);background:var(--ok-bg)}
.meter .off{color:var(--ng);background:var(--ng-bg)}
.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:12px}
ol,ul{padding-left:1.4em}
table{width:100%;border-collapse:collapse;font-size:.93rem}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--soft)}
.table-scroll{overflow-x:auto}
.cta{display:block;text-align:center;text-decoration:none;padding:16px;border-radius:12px;background:var(--accent);color:var(--accent-ink);font-weight:700;margin:24px 0}
footer{margin:48px 0 0;padding:24px 0 40px;border-top:1px solid var(--line);font-size:.88rem;color:var(--muted)}
footer a{color:inherit;margin-right:16px}
[hidden]{display:none!important}
.cite{position:relative;margin:10px 0 20px}
.cite pre{margin:0;padding:14px 14px 46px;background:var(--soft);border:1px solid var(--line);border-radius:10px;font-family:Consolas,Menlo,monospace;font-size:.82rem;line-height:1.6;white-space:pre-wrap;word-break:break-word;overflow-x:auto}
.copybtn{position:absolute;right:10px;bottom:10px;padding:7px 15px;font-size:.82rem;border-radius:8px}
.copybtn.copied{background:var(--ok-bg);color:var(--ok)}
/* ブログ */
.crumbs{font-size:.82rem;color:var(--muted);margin:4px 0 0}
.crumbs a{color:inherit}
article img{max-width:100%;height:auto;border-radius:10px}
blockquote{margin:16px 0;padding:10px 16px;border-left:4px solid var(--line);background:var(--soft);border-radius:0 10px 10px 0}
blockquote p{margin:0}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 20px;margin:24px 0}
.toc-t{font-weight:700;margin:0 0 4px}
.toc ol{margin:0;padding-left:1.3em}
.toc a{text-decoration:none}
.endcta{margin-top:40px}
.endcta-t{font-weight:700;font-size:1.1rem;margin:0 0 6px}
.endcta .cta{margin:16px 0 0}
.author{border-top:1px solid var(--line);margin:32px 0 0;padding:16px 0 0;font-size:.92rem;color:var(--muted)}
.author-t{font-weight:700;color:var(--text);margin:0 0 4px}
.author p{margin:0 0 6px}
.related ul,.blog-list{list-style:none;padding:0}
.related li{margin:0 0 10px}
.blog-list li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:0 0 12px}
.blog-list li>a{font-weight:700;text-decoration:none;display:block;line-height:1.5}
.blog-list .note{display:block;margin:4px 0 0}
.blog-desc{display:block;font-size:.9rem;color:var(--muted);margin-top:4px}
.eyecatch{margin:16px 0 8px}
.eyecatch img{display:block;width:100%;height:auto}
article figure{margin:20px 0}
article figure img{display:block;width:100%;height:auto}
article figcaption{font-size:.78rem;color:var(--muted);margin-top:4px}
/* ブログの装飾（md2html の :::枠 と ==マーカー==） */
article h2{padding:10px 14px;border-left:6px solid var(--accent);background:var(--surface);border-radius:0 10px 10px 0;margin-top:48px}
article h3{padding:0 0 4px;border-bottom:2px solid var(--line)}
.mk{background:linear-gradient(transparent 60%,#ffe58a 60%);color:inherit;padding:0 1px;font-weight:700}
@media (prefers-color-scheme:dark){.mk{background:linear-gradient(transparent 60%,#6b5a12 60%)}}
.box{border:2px solid var(--line);border-radius:12px;padding:6px 18px 10px;margin:22px 0;background:var(--surface)}
.box-t{font-weight:700;margin:8px 0 4px;display:flex;align-items:center;gap:8px}
.box-t::before{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;font-size:.82rem;color:#fff;flex:none}
.box ul,.box ol{margin:6px 0}
.box p{margin:6px 0}
.box-point{border-color:#2457d6;background:#f2f6ff}.box-point .box-t{color:#2457d6}.box-point .box-t::before{content:"!";background:#2457d6}
.box-note{border-color:#d97706;background:#fff8eb}.box-note .box-t{color:#b45309}.box-note .box-t::before{content:"⚠";background:#d97706}
.box-tip{border-color:#0f9d6b;background:#effaf5}.box-tip .box-t{color:#0b7a53}.box-tip .box-t::before{content:"💡";background:transparent;font-size:1rem}
.box-check{border-color:#7c3aed;background:#f7f3ff}.box-check .box-t{color:#6d28d9}.box-check .box-t::before{content:"✓";background:#7c3aed}
.box-check ul{list-style:none;padding-left:.2em}.box-check li::before{content:"☑ ";color:#7c3aed}
.box-summary{border-color:#1c2430;background:var(--surface)}.box-summary .box-t::before{content:"≡";background:#1c2430}
.box-data{border-color:#0e7490;background:#ecfeff}.box-data .box-t{color:#0e7490}.box-data .box-t::before{content:"📊";background:transparent;font-size:1rem}
.box-example{border-style:dashed;border-color:#64748b}.box-example .box-t::before{content:"例";background:#64748b;font-size:.72rem}
@media (prefers-color-scheme:dark){.box-point,.box-note,.box-tip,.box-check,.box-data{background:var(--surface)}}
.blog-list .thumb{display:block;margin:0 0 10px}
.blog-list .thumb img{display:block;width:100%;height:auto;border-radius:8px}
@media (min-width:640px){.blog-list li{display:grid;grid-template-columns:220px 1fr;column-gap:18px}.blog-list .thumb{grid-row:1/5;margin:0}}