.siteHeader{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;background:#fff;border-bottom:1px solid #e5e7eb;color:#111827;width:100%;}
.siteHeader.isSticky{position:sticky;top:0;z-index:20;}
.siteHeaderInner{height:56px;width:100%;box-sizing:border-box;max-width:920px;margin:0 auto;padding:0 12px;display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:nowrap;min-width:0;}
.siteHeaderBrand{display:inline-flex;align-items:center;gap:8px;min-width:0;flex:0 1 auto;text-decoration:none;color:inherit;white-space:nowrap;}
.siteHeaderIcon{width:28px;height:28px;border-radius:8px;object-fit:cover;flex:0 0 auto;box-shadow:0 4px 12px rgba(0,0,0,.12);}
.siteHeaderBrandText{font-size:20px;font-weight:800;letter-spacing:.02em;line-height:1;white-space:nowrap;overflow:hidden;text-overflow:clip;}
.siteHeaderActions{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex:0 0 auto;flex-wrap:nowrap;white-space:nowrap;min-width:0;}
.siteHeaderAction{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid #d1d5db;background:#fff;color:#111827;border-radius:12px;padding:0 12px;font-size:14px;font-weight:700;line-height:1;text-decoration:none;cursor:pointer;white-space:nowrap;flex:0 0 auto;}
.siteHeaderAction:hover{background:#f9fafb;text-decoration:none;}
.siteHeaderAction svg{display:block;flex:0 0 auto;pointer-events:none;}
.siteHeaderPrimary{border-color:#2563eb;background:#2563eb;color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.18);}
.siteHeaderPrimary:hover{background:#1d4ed8;}
.siteHeaderPrimary[hidden]{display:none!important;}
@media (max-width: 360px){.siteHeader.hasVisibleRegisterCta .siteHeaderBrandText{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}.siteHeaderInner{padding:0 8px;gap:6px;}.siteHeaderActions{gap:6px;}.siteHeaderAction{padding:0 10px;font-size:13px;}}
@media (max-width: 480px){.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderBrandText{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderInner{padding-inline:4px;gap:4px;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderActions{gap:2px;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderAction{min-height:44px;padding-inline:4px;gap:2px;font-size:12px;}}
@media (max-width: 320px){.siteHeaderInner{padding:0 6px;}.siteHeaderAction{padding:0 8px;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderInner{padding-inline:4px;gap:4px;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderActions{gap:2px;}.siteHeader.hasContextBack.hasVisibleRegisterCta .siteHeaderAction{padding-inline:4px;gap:2px;font-size:12px;}}