:root{--bg:#ffffff;--panel:#ffffff;--panel-alt:#faf6f7;--border:#e8e0e2;--text:#1f2127;--muted:#6b7280;--accent:#7b1e2b;--accent-dark:#5c141e;--accent-soft:rgba(123,30,43,0.08);--hot:#c62828;--warm:#b26a00;--cold:#2c5fb3;--ok:#1f8a4c}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,Segoe UI,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;font-size:14px;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{display:flex;align-items:center;gap:24px;padding:12px 24px;background:linear-gradient(90deg,var(--accent-dark) 0,var(--accent) 100%);color:#fff;box-shadow:0 1px 4px rgba(92,20,30,.25)}.site-title{font-weight:700;letter-spacing:.04em;color:#fff}.site-nav{display:flex;gap:16px}.site-nav a{color:rgba(255,255,255,.85);font-size:13px;padding-bottom:2px;border-bottom:2px solid transparent}.site-nav 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8px;border-radius:999px;font-size:12px;font-weight:700}.tier-hot{background:rgba(198,40,40,.12);color:var(--hot)}.tier-warm{background:rgba(178,106,0,.14);color:var(--warm)}.tier-cold{background:rgba(44,95,179,.12);color:var(--cold)}.page-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--accent)}.page-head h1{margin:0;font-size:22px;color:var(--text)}.page-intro{border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0;padding:10px 16px;margin-bottom:20px}.page-intro .ja{margin:0;font-size:13px;color:var(--text)}.page-intro .en{margin:4px 0 0;font-size:12px;color:var(--muted)}.demo-banner{background:rgba(178,106,0,.1);border:1px solid rgba(178,106,0,.35);color:#8a5200;border-radius:8px;padding:10px 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var(--border);border-radius:6px;color:var(--text);font-family:inherit}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}button{padding:7px 14px;background:var(--panel);border:1px solid var(--border);border-radius:6px;color:var(--text);cursor:pointer;font-size:13px}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:700;padding:10px 20px;margin-top:8px}button.primary:hover:not(:disabled){background:var(--accent-dark);border-color:var(--accent-dark);color:#fff}select{padding:7px 10px}textarea{padding:8px 10px}