:root{--paper:#fbfaf6;--ink:#2b2b2b;--sub:#6b6b6b;--line:#e3dfd6;--accent:#2f5d7c;--mark:#fff3c4;--card:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;font-size:16px;line-height:1.95;letter-spacing:.02em}
.page{max-width:720px;margin:0 auto;padding:0 20px}
.page.wide{max-width:960px}
a{color:var(--accent);text-underline-offset:3px}
.top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 0;padding:22px 0 10px;border-bottom:1px solid var(--line)}
.top .name{font-weight:700;text-decoration:none;color:var(--ink)}
.top nav a{font-size:14px;margin-left:14px;color:var(--sub);text-decoration:none}
.top nav a:hover,.top nav a[aria-current]{color:var(--ink);text-decoration:underline}
h1{font-size:24px;line-height:1.6;margin:40px 0 16px;font-weight:700}
h2{font-size:19px;margin:52px 0 12px}
h2 small{display:block;font-size:13px;color:var(--sub);font-weight:400}
h3{font-size:16px;margin:28px 0 6px}
p{margin:0 0 16px}
ul,ol{padding-left:1.4em;margin:0 0 16px}
li{margin-bottom:6px}
.lead{color:#444}
.free{display:inline-block;font-size:12px;border:1px solid var(--accent);color:var(--accent);border-radius:3px;padding:0 6px;margin-left:6px;vertical-align:2px;font-weight:400}
.go{display:inline-block;margin:6px 8px 4px 0;padding:9px 18px;border:1.5px solid var(--ink);border-radius:4px;color:var(--ink);text-decoration:none;font-weight:700;background:#fff;cursor:pointer;font-size:15px;font-family:inherit}
.go:hover{background:var(--ink);color:#fff}
.go.sub{border-color:var(--line);font-weight:400}
.go:disabled{opacity:.4;cursor:default;background:#fff;color:var(--ink)}
.small{font-size:13.5px;color:var(--sub)}
.box{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:16px 18px;margin:12px 0 18px}
.tools{display:grid;grid-template-columns:1fr;gap:14px;margin:8px 0}
@media(min-width:640px){.tools{grid-template-columns:1fr 1fr}}
.tool{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:16px 18px;text-decoration:none;color:var(--ink);display:block}
.tool:hover{border-color:var(--ink)}
.tool b{display:block;margin-bottom:4px}
.tool span{font-size:14px;color:var(--sub)}
.table-scroll{overflow-x:auto;margin:8px 0 6px}
table.plain{border-collapse:collapse;font-size:14px;background:#fff;min-width:520px}
table.plain th,table.plain td{border:1px solid var(--line);padding:6px 9px;text-align:left;vertical-align:top}
table.plain th{background:#f3f0e8}
.sample{border:1px dashed #cfc9bc;border-radius:6px;padding:18px;text-align:center;color:var(--sub);background:#fff}
textarea{width:100%;min-height:150px;padding:10px 12px;border:1px solid #cfc9bc;border-radius:4px;font:16px/1.7 "UD デジタル 教科書体 NK-R","UD Digi Kyokasho NK-R",sans-serif;background:#fff;color:var(--ink);resize:vertical}
textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px 18px;margin:14px 0}
.controls label{font-size:14px;color:var(--sub);display:block}
.controls output{color:var(--ink);font-weight:700;margin-left:4px}
.controls input[type=range]{width:100%;accent-color:var(--accent)}
.preview{width:100%;height:420px;border:1px solid var(--line);border-radius:4px;background:#fff;margin-top:6px}
.status{font-size:13.5px;color:var(--sub);min-height:1.5em}
.miss{font-size:13.5px;color:#8a5a00;background:#fff8e6;border:1px solid #f0dfb5;border-radius:4px;padding:8px 10px;display:none}
.article h2{border-top:1px solid var(--line);padding-top:24px}
hr{border:0;border-top:1px solid var(--line);margin:48px 0}
footer{padding:28px 0 40px;font-size:13px;color:var(--sub);border-top:1px solid var(--line);margin-top:56px}
footer a{color:var(--sub);margin-right:14px;display:inline-block}
@media(max-width:560px){h1{font-size:21px}.top nav a{margin-left:0;margin-right:12px;font-size:13px}.top nav{width:100%}}