:root{color-scheme:dark;--bg:#0a0a0f;--panel:#14141f;--panel2:#1a1a28;--line:#2a2a3d;--text:#f7f7fb;--muted:#a6a6bb;--accent:#8b7cf6;--accent2:#5ee0b8;--warn:#ffc66d;--max:1080px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;line-height:1.8}a{color:#b8adff}a:hover{text-decoration-thickness:2px}.wrap{width:min(calc(100% - 32px),var(--max));margin:auto}.site-header{position:sticky;top:0;z-index:10;background:rgba(10,10,15,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{display:flex;gap:18px;align-items:center;justify-content:space-between;min-height:64px}.brand{font-weight:800;color:var(--text);text-decoration:none;letter-spacing:.02em}.nav-links{display:flex;gap:14px;flex-wrap:wrap}.nav-links a{font-size:.92rem;color:var(--muted);text-decoration:none}.hero{padding:72px 0 48px}.eyebrow{color:var(--accent2);font-weight:700;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase}.hero h1,.article h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.2;margin:.25em 0}.lead{font-size:1.15rem;color:#d3d3e2;max-width:760px}.notice{border:1px solid #5a4730;background:#1d1811;padding:16px 18px;border-radius:14px;color:#f5d9ad}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}.card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;color:inherit;text-decoration:none}.card:hover{border-color:#514a7e}.card h2,.card h3{margin-top:0;line-height:1.35}.card p{color:var(--muted);margin-bottom:0}.section{padding:28px 0}.section h2{font-size:clamp(1.45rem,3vw,2rem);line-height:1.35}.steps{counter-reset:step;display:grid;gap:12px;padding:0}.steps li{list-style:none;background:var(--panel);border:1px solid var(--line);padding:18px;border-radius:14px}.steps li:before{counter-increment:step;content:counter(step);display:inline-grid;place-items:center;width:28px;height:28px;margin-right:10px;border-radius:50%;background:var(--accent);color:white;font-weight:800}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{display:inline-block;border:1px solid var(--line);background:var(--panel2);border-radius:999px;padding:5px 10px;color:#d8d8e8;font-size:.88rem}.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.button{display:inline-block;padding:12px 18px;border-radius:12px;background:var(--accent);color:white;text-decoration:none;font-weight:700}.button.secondary{background:transparent;border:1px solid var(--line);color:var(--text)}.article{padding:42px 0 64px}.breadcrumb{font-size:.9rem;color:var(--muted);margin-bottom:20px}.breadcrumb a{color:var(--muted)}.article-content{max-width:800px}.article-content h2{margin-top:2.2em;line-height:1.4}.article-content h3{margin-top:1.8em}.article-content p,.article-content li{color:#d4d4e3}.article-content strong{color:var(--text)}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;min-width:580px;background:var(--panel)}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}th{color:var(--text);background:#1b1b29}td{color:#d7d7e5}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#11111a;border:1px solid var(--line);padding:14px 16px;border-radius:12px;overflow:auto}.source-list{padding-left:1.2em}.source-list li{margin:.4em 0}.meta{color:var(--muted);font-size:.9rem}.callout{border-left:4px solid var(--accent2);padding:10px 16px;background:#111b19;border-radius:0 12px 12px 0}.site-footer{border-top:1px solid var(--line);padding:34px 0 46px;color:var(--muted);font-size:.9rem}.footer-links{display:flex;gap:14px;flex-wrap:wrap}@media(max-width:700px){.nav{align-items:flex-start;padding:14px 0;flex-direction:column}.nav-links{padding-bottom:6px}.hero{padding-top:48px}.wrap{width:min(calc(100% - 24px),var(--max))}.article{padding-top:28px}.card{padding:18px}}