:root{color-scheme:light;--ink:#123f3d;--teal:#2f7a78;--gold:#f3b61f;--paper:#fffdf8;--line:#dfd2bd;--muted:#5d706e}*{box-sizing:border-box}body{margin:0;background:#ece8df;color:var(--ink);font-family:"Yu Gothic UI","Noto Sans JP",sans-serif}.sheet{width:min(100%,210mm);min-height:297mm;margin:16px auto;padding:12mm;background:var(--paper);box-shadow:0 12px 40px #243e3b22}header{display:grid;grid-template-columns:46mm 1fr;gap:8mm;align-items:center;border-bottom:3px solid var(--gold);padding-bottom:6mm}.brand{display:flex;align-items:center;gap:3mm;font-size:18px}.brand img{width:18mm;height:18mm}.eyebrow{color:#a64f21;font-weight:800}h1{margin:1mm 0 2mm;font-size:25px;line-height:1.25}header p{margin:0;color:var(--muted);line-height:1.5}.steps{display:grid;grid-template-columns:1fr 1fr;gap:3mm;margin-top:5mm}.steps article{display:grid;grid-template-columns:10mm 1fr;gap:3mm;min-height:31mm;padding:3.5mm;border:1px solid var(--line);border-radius:4mm;background:#fff}.steps article>b{display:grid;place-items:center;width:9mm;height:9mm;border-radius:50%;background:var(--gold);font-size:17px}.steps h2{margin:0 0 1mm;font-size:15px}.steps p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}.steps code{font-size:11px}.safety{margin-top:5mm;padding:4mm 5mm;border-left:5px solid var(--gold);background:#fff7d9}.safety h2{margin:0 0 2mm;font-size:16px}.safety ul{margin:0;padding-left:1.3em;font-size:12px;line-height:1.6}footer{display:flex;align-items:center;justify-content:space-between;gap:5mm;margin-top:4mm;font-size:11px;color:var(--muted)}button{border:1px solid var(--teal);border-radius:8px;background:var(--teal);color:#fff;padding:9px 14px;font-weight:700;cursor:pointer}@page{size:A4 portrait;margin:0}@media print{body{background:#fff}.sheet{width:210mm;height:297mm;min-height:0;margin:0;padding:11mm;box-shadow:none;overflow:hidden}button{display:none}}@media(max-width:700px){.sheet{margin:0;padding:20px;min-height:100vh}header{grid-template-columns:1fr}.steps{grid-template-columns:1fr}footer{align-items:flex-start;flex-direction:column}}