:root{color-scheme:light;--bg: #f7f8fc;--bg-elevated: #ffffff;--panel: #ffffff;--panel-soft: rgba(255, 255, 255, .72);--text: #0b1424;--text-strong: #050a18;--muted: #5a6478;--muted-strong: #3b4458;--border: #e4e7ef;--border-strong: #d2d7e2;--accent: #4f46e5;--accent-2: #7c3aed;--accent-soft: #eef0ff;--accent-dark: #312e81;--accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);--focus: rgba(99, 102, 241, .32);--critical: #b42318;--warning: #a15c00;--info: #175cd3;--ok: #027a48;--ok-bg: #ecfdf5;--warning-bg: #fff7ed;--critical-bg: #fef2f2;--info-bg: #eff8ff;--surface: rgba(255, 255, 255, .62);--radius-xl: 28px;--radius-lg: 20px;--radius-md: 14px;--radius-sm: 10px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow-md: 0 4px 16px rgba(20, 26, 56, .06), 0 1px 2px rgba(15, 23, 42, .04);--shadow-lg: 0 24px 60px -20px rgba(20, 26, 70, .18), 0 8px 20px -12px rgba(20, 26, 70, .1);--shadow-glow: 0 18px 60px -16px rgba(99, 102, 241, .45);--ring: 0 0 0 1px rgba(15, 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var(--border);padding-top:.85rem}.dkim-selector:first-child{border-top:0;padding-top:0}.dkim-selector-header{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.55rem;margin:0 0 .55rem}.record-group{margin:.65rem 0}.record-group strong{display:inline-block;margin-bottom:.35rem;color:var(--text-strong)}.footer{border-top:1px solid var(--border);color:var(--muted);padding:2.5rem 1.5rem;text-align:center;font-size:.92rem;margin-top:4rem}.prose{max-width:78ch}.prose li{margin:.4rem 0}.prose code{font-family:var(--font-mono);background:color-mix(in oklab,var(--text) 6%,transparent);padding:.1rem .35rem;border-radius:6px;font-size:.88em}@media(max-width:820px){.hero,.grid,.two-col{grid-template-columns:1fr}.hero{padding:2rem 0 1rem;gap:1.75rem}.tool-layout{grid-template-columns:1fr}.tool-panel{position:static}.nav{align-items:flex-start;flex-direction:column;padding:.9rem 1.25rem}.nav-links{margin-left:-.4rem}main{padding:2rem 1.25rem 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