.sd-container[data-astro-cid-ar2kqdzv]{max-width:64rem;margin:0 auto;padding:0 1.5rem}.sd-section[data-astro-cid-ar2kqdzv]{padding:4.5rem 1.5rem;background:var(--color-bg)}.sd-section-alt[data-astro-cid-ar2kqdzv]{padding:4.5rem 1.5rem;background:var(--color-bg-subtle);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}.sd-kicker[data-astro-cid-ar2kqdzv]{display:inline-block;font-size:.6875rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent);margin-bottom:.75rem}.sd-h1[data-astro-cid-ar2kqdzv]{font-size:clamp(1.875rem,4vw,2.625rem);font-weight:700;letter-spacing:-.025em;line-height:1.1;color:var(--color-text);margin:0}.sd-accent[data-astro-cid-ar2kqdzv]{font-style:italic;color:var(--color-accent)}.sd-h2[data-astro-cid-ar2kqdzv]{font-size:1.5rem;font-weight:700;letter-spacing:-.02em;color:var(--color-text);margin:0 0 1.5rem}.sd-lead[data-astro-cid-ar2kqdzv]{font-size:1rem;color:var(--color-text-muted);line-height:1.75;max-width:36rem;margin:1.25rem 0 0}.sd-body[data-astro-cid-ar2kqdzv]{font-size:.9375rem;color:var(--color-text-muted);line-height:1.8;margin:0 0 1.5rem}.sd-link[data-astro-cid-ar2kqdzv]{color:var(--color-accent);text-decoration:none}.sd-link[data-astro-cid-ar2kqdzv]:hover{text-decoration:underline}.sd-inline-link[data-astro-cid-ar2kqdzv]{color:var(--color-accent);text-decoration:none;font-size:.875rem}.sd-inline-link[data-astro-cid-ar2kqdzv]:hover{text-decoration:underline}.sd-related[data-astro-cid-ar2kqdzv]{font-size:.875rem;color:var(--color-text-muted);margin:1rem 0 0}.sd-hero[data-astro-cid-ar2kqdzv]{padding:4rem 1.5rem 4.5rem;border-bottom:1px solid var(--color-border)}.sd-breadcrumb[data-astro-cid-ar2kqdzv]{display:flex;align-items:center;gap:.5rem;font-size:.8125rem;color:var(--color-text-subtle);margin-bottom:1.5rem;flex-wrap:wrap}.sd-breadcrumb[data-astro-cid-ar2kqdzv] a[data-astro-cid-ar2kqdzv]{color:var(--color-text-muted);text-decoration:none}.sd-breadcrumb[data-astro-cid-ar2kqdzv] a[data-astro-cid-ar2kqdzv]:hover{color:var(--color-text)}.sd-hero-inner[data-astro-cid-ar2kqdzv]{display:grid;gap:3rem;align-items:start}@media(min-width:960px){.sd-hero-inner[data-astro-cid-ar2kqdzv]{grid-template-columns:1fr 1fr;align-items:center}}.sd-dns-diagram[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.875rem;background:var(--color-bg);overflow:hidden}.sd-dns-header[data-astro-cid-ar2kqdzv]{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;border-bottom:1px solid var(--color-border);background:var(--color-bg-subtle);font-size:.75rem;font-weight:600;color:var(--color-text-muted);font-family:var(--font-mono)}.sd-dns-header[data-astro-cid-ar2kqdzv] svg[data-astro-cid-ar2kqdzv]{color:var(--color-accent)}.sd-dns-row[data-astro-cid-ar2kqdzv]{display:grid;grid-template-columns:2.5rem 1fr auto;gap:.625rem;align-items:center;padding:.625rem 1.25rem;border-bottom:1px solid var(--color-border)}.sd-dns-row[data-astro-cid-ar2kqdzv]:last-child{border-bottom:none}.sd-dns-type[data-astro-cid-ar2kqdzv]{font-family:var(--font-mono);font-size:.625rem;font-weight:700;color:var(--color-text-muted);background:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:3px;padding:1px 4px;text-align:center}.sd-dns-host[data-astro-cid-ar2kqdzv]{font-family:var(--font-mono);font-size:.6875rem;color:var(--color-text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sd-dns-badge[data-astro-cid-ar2kqdzv]{font-size:.5625rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:2px 6px;border-radius:9999px;flex-shrink:0}.sd-dns-badge-spf[data-astro-cid-ar2kqdzv]{background:#dbeafe;color:#1d4ed8}.sd-dns-badge-dkim[data-astro-cid-ar2kqdzv]{background:#dcfce7;color:#15803d}.sd-dns-badge-dmarc[data-astro-cid-ar2kqdzv]{background:#fef3c7;color:#92400e}.dark .sd-dns-badge-spf[data-astro-cid-ar2kqdzv]{background:#1d4ed833;color:#93c5fd}.dark .sd-dns-badge-dkim[data-astro-cid-ar2kqdzv]{background:#15803d33;color:#86efac}.dark .sd-dns-badge-dmarc[data-astro-cid-ar2kqdzv]{background:#92400e33;color:#fcd34d}.sd-dns-value[data-astro-cid-ar2kqdzv]{display:none}.sd-protocol-grid[data-astro-cid-ar2kqdzv]{display:grid;gap:1rem;grid-template-columns:1fr}@media(min-width:640px){.sd-protocol-grid[data-astro-cid-ar2kqdzv]{grid-template-columns:repeat(3,1fr)}}.sd-protocol-card[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.875rem;background:var(--color-bg);padding:1.25rem}.sd-protocol-icon[data-astro-cid-ar2kqdzv]{width:2.25rem;height:2.25rem;border-radius:.5rem;display:flex;align-items:center;justify-content:center;margin-bottom:.875rem}.sd-protocol-icon-spf[data-astro-cid-ar2kqdzv]{background:#dbeafe;color:#1d4ed8}.sd-protocol-icon-dkim[data-astro-cid-ar2kqdzv]{background:#dcfce7;color:#15803d}.sd-protocol-icon-dmarc[data-astro-cid-ar2kqdzv]{background:#fef3c7;color:#92400e}.dark .sd-protocol-icon-spf[data-astro-cid-ar2kqdzv]{background:#1d4ed826;color:#93c5fd}.dark .sd-protocol-icon-dkim[data-astro-cid-ar2kqdzv]{background:#15803d26;color:#86efac}.dark .sd-protocol-icon-dmarc[data-astro-cid-ar2kqdzv]{background:#92400e26;color:#fcd34d}.sd-protocol-name[data-astro-cid-ar2kqdzv]{font-size:.9375rem;font-weight:700;color:var(--color-text);margin:0 0 .5rem;font-family:var(--font-mono)}.sd-protocol-body[data-astro-cid-ar2kqdzv]{font-size:.8125rem;color:var(--color-text-muted);line-height:1.6;margin:0}.sd-step-header[data-astro-cid-ar2kqdzv]{display:flex;gap:1.25rem;align-items:flex-start;margin-bottom:1.25rem}.sd-step-nr[data-astro-cid-ar2kqdzv]{width:2.25rem;height:2.25rem;flex-shrink:0;background:var(--color-accent);color:var(--color-bg);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:700;margin-top:1.375rem}.sd-step-header[data-astro-cid-ar2kqdzv]>div[data-astro-cid-ar2kqdzv]{flex:1}.sd-record-block[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.75rem;overflow:hidden;margin-bottom:1rem}.sd-record-row[data-astro-cid-ar2kqdzv]{display:grid;grid-template-columns:9rem 1fr;gap:.75rem;align-items:center;padding:.625rem 1.25rem;border-bottom:1px solid var(--color-border)}.sd-record-row[data-astro-cid-ar2kqdzv]:last-child{border-bottom:none}.sd-record-field[data-astro-cid-ar2kqdzv]{font-size:.75rem;font-weight:600;color:var(--color-text-muted);flex-shrink:0}.sd-record-val[data-astro-cid-ar2kqdzv]{font-family:var(--font-mono);font-size:.8125rem;color:var(--color-accent);background:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:4px;padding:2px 6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sd-record-val-full[data-astro-cid-ar2kqdzv]{white-space:normal;word-break:break-all}.sd-tip[data-astro-cid-ar2kqdzv]{display:flex;gap:.625rem;align-items:flex-start;background:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:.625rem;padding:.875rem 1rem;font-size:.8125rem;color:var(--color-text-muted);line-height:1.65}.sd-tip[data-astro-cid-ar2kqdzv] svg[data-astro-cid-ar2kqdzv]{flex-shrink:0;color:var(--color-accent);margin-top:1px}.sd-tip[data-astro-cid-ar2kqdzv] p[data-astro-cid-ar2kqdzv]{margin:0}.sd-tip[data-astro-cid-ar2kqdzv] code[data-astro-cid-ar2kqdzv]{font-family:var(--font-mono);font-size:.75rem;background:var(--color-bg);border:1px solid var(--color-border);border-radius:3px;padding:0 4px}.sd-policy-grid[data-astro-cid-ar2kqdzv]{display:grid;gap:.875rem;grid-template-columns:1fr;margin-top:1.5rem}@media(min-width:640px){.sd-policy-grid[data-astro-cid-ar2kqdzv]{grid-template-columns:repeat(3,1fr)}}.sd-policy-card[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.75rem;background:var(--color-bg);padding:1.125rem}.sd-policy-top[data-astro-cid-ar2kqdzv]{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem;gap:.5rem;flex-wrap:wrap}.sd-policy-tag[data-astro-cid-ar2kqdzv]{font-family:var(--font-mono);font-size:.8125rem;font-weight:700;color:var(--color-accent)}.sd-policy-badge[data-astro-cid-ar2kqdzv]{font-size:.5625rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;padding:2px 6px;border-radius:9999px;background:var(--color-bg-subtle);color:var(--color-text-muted);border:1px solid var(--color-border);white-space:nowrap}.sd-policy-label[data-astro-cid-ar2kqdzv]{font-size:.875rem;font-weight:600;color:var(--color-text);margin:0 0 .375rem}.sd-policy-body[data-astro-cid-ar2kqdzv]{font-size:.8125rem;color:var(--color-text-muted);line-height:1.55;margin:0}.sd-check-flow[data-astro-cid-ar2kqdzv]{display:flex;flex-direction:column;gap:.75rem;margin-top:1.5rem;max-width:36rem}.sd-check-step[data-astro-cid-ar2kqdzv]{display:flex;align-items:center;gap:1rem}.sd-check-nr[data-astro-cid-ar2kqdzv]{width:1.75rem;height:1.75rem;flex-shrink:0;background:var(--color-accent-subtle);color:var(--color-accent);border:1px solid var(--color-accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700}.sd-check-text[data-astro-cid-ar2kqdzv]{font-size:.9rem;color:var(--color-text-muted)}.sd-mistakes-grid[data-astro-cid-ar2kqdzv]{display:grid;gap:.875rem;grid-template-columns:1fr}@media(min-width:640px){.sd-mistakes-grid[data-astro-cid-ar2kqdzv]{grid-template-columns:repeat(2,1fr)}}.sd-mistake-card[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.75rem;background:var(--color-bg);padding:1.125rem 1.25rem;display:flex;flex-direction:column;gap:.625rem}.sd-mistake-problem[data-astro-cid-ar2kqdzv]{display:flex;align-items:flex-start;gap:.5rem;font-size:.875rem;color:var(--color-text-muted);line-height:1.5}.sd-mistake-problem[data-astro-cid-ar2kqdzv] svg[data-astro-cid-ar2kqdzv]{flex-shrink:0;color:var(--color-text-subtle);margin-top:2px}.sd-mistake-fix[data-astro-cid-ar2kqdzv]{display:flex;align-items:flex-start;gap:.5rem;font-size:.8125rem;color:var(--color-accent);line-height:1.5;padding-top:.5rem;border-top:1px solid var(--color-border)}.sd-mistake-fix[data-astro-cid-ar2kqdzv] svg[data-astro-cid-ar2kqdzv]{flex-shrink:0;margin-top:2px}.sd-faq-list[data-astro-cid-ar2kqdzv]{max-width:44rem;display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.sd-faq-item[data-astro-cid-ar2kqdzv]{border:1px solid var(--color-border);border-radius:.75rem;background:var(--color-bg);overflow:hidden}.sd-faq-item[data-astro-cid-ar2kqdzv][open]{border-color:var(--color-border-strong)}.sd-faq-summary[data-astro-cid-ar2kqdzv]{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.25rem;cursor:pointer;list-style:none;font-size:.9375rem;font-weight:500;color:var(--color-text);-webkit-user-select:none;-moz-user-select:none;user-select:none}.sd-faq-summary[data-astro-cid-ar2kqdzv]::-webkit-details-marker{display:none}.sd-faq-chevron[data-astro-cid-ar2kqdzv]{width:1rem;height:1rem;flex-shrink:0;color:var(--color-text-muted);transition:transform .2s}.sd-faq-item[data-astro-cid-ar2kqdzv][open] .sd-faq-chevron[data-astro-cid-ar2kqdzv]{transform:rotate(180deg)}.sd-faq-body[data-astro-cid-ar2kqdzv]{padding:0 1.25rem 1rem;font-size:.9rem;color:var(--color-text-muted);line-height:1.7}.sd-faq-links[data-astro-cid-ar2kqdzv]{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;padding-top:1rem;border-top:1px solid var(--color-border);max-width:44rem}@media(max-width:640px){.sd-hero[data-astro-cid-ar2kqdzv],.sd-section[data-astro-cid-ar2kqdzv],.sd-section-alt[data-astro-cid-ar2kqdzv]{padding-left:1rem;padding-right:1rem}.sd-h1[data-astro-cid-ar2kqdzv]{font-size:1.75rem}.sd-record-row[data-astro-cid-ar2kqdzv]{grid-template-columns:1fr;gap:.25rem}}