:root{--bg:#f5f7fa;--ink:#1f2a37;--muted:#5d6b7a;--line:#d9e0e8;--pri:#1f3a5f;--pri-dark:#152a47;--pri-soft:#e8eef6;--card:#ffffff;--ok:#1e7a4c;--ok-soft:#e4f4ea;--warn:#8a5d00;--warn-soft:#fff1cf;--danger:#b3261e;--danger-soft:#fdecea;--tap:44px;--font:"BIZ UDPGothic","Yu Gothic","Meiryo",-apple-system,"Hiragino Sans",sans-serif;--num:"BIZ UDGothic","Yu Gothic",ui-monospace,monospace}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:15px;line-height:1.6;min-width:320px;overflow-wrap:anywhere}a{color:var(--pri)}h1{font-size:1.4em;margin:0 0 12px}h1,h2{color:var(--pri-dark)}h2{font-size:1.1em;margin:22px 0 8px}button{font-family:inherit;font-size:1em;min-height:var(--tap);min-width:var(--tap);padding:0 16px;border-radius:10px;border:1px solid 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(max-width:640px){main{padding:14px 12px}.top{padding:12px 12px 8px}.demo-note{padding:6px 12px}.nav a{padding:8px 10px;font-size:13px}.cards{grid-template-columns:1fr}}@media print{.demo-note,.no-print,.top{display:none!important}body{background:#fff}}