:root{--article-ink:#1e2a44}.g-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0;font-size:15px;font-weight:600}.g-cat{color:var(--accent);font-size:14px;font-weight:600;display:block}.crumbs-v2 ol{color:var(--muted);flex-wrap:wrap;gap:0 8px;margin:0;padding:0;font-size:15px;list-style:none;display:flex}.crumbs-v2 li{align-items:center;display:inline-flex}.crumbs-v2 li+li:before{content:"/";color:var(--muted);margin-right:8px}.crumbs-v2 a,.crumbs-v2 [aria-current]{overflow-wrap:anywhere;align-items:center;min-width:44px;min-height:44px;display:inline-flex}.crumbs-v2 a{color:var(--ink)}.crumbs-v2 a:hover{color:var(--accent)}.crumbs-v2 [aria-current]{color:var(--muted)}.gi{flex-direction:column;padding-bottom:clamp(56px,8vw,96px);display:flex}.gi-intro{flex-direction:column;gap:20px;padding-top:clamp(40px,6vw,64px);display:flex}.gi-title{font-family:var(--font-display);letter-spacing:-.035em;overflow-wrap:break-word;max-width:980px;font-size:clamp(40px,6vw,84px);font-weight:800;line-height:.98}.gi-lede{max-width:700px;color:var(--body);font-size:clamp(18px,2vw,21px);line-height:1.55}.topic-target{height:0;scroll-margin-top:16px;display:block}.topics{flex-wrap:wrap;gap:10px;margin-top:28px;padding-bottom:40px;display:flex}.chip{border:2px solid var(--ink);min-height:48px;color:var(--ink);background:0 0;border-radius:999px;align-items:center;padding:0 18px;font-size:15px;font-weight:600;line-height:1.2;text-decoration:none;display:inline-flex}.chip:hover{color:var(--accent);border-color:var(--accent)}.chip-all{background:var(--ink);color:#fff}.chip-all:hover{color:#fff;background:#0b1428;border-color:#0b1428}.topic-target:target~.topics .chip-all{color:var(--ink);background:0 0}.topic-target:target~.topics .chip-all:hover{color:var(--accent);border-color:var(--accent)}#topic-getting-started:target~.topics .chip[data-topic=getting-started],#topic-welcome-emails:target~.topics .chip[data-topic=welcome-emails],#topic-signup-pages:target~.topics .chip[data-topic=signup-pages],#topic-deliverability:target~.topics .chip[data-topic=deliverability],#topic-tools-you-already-pay-for:target~.topics .chip[data-topic=tools-you-already-pay-for],#topic-case-studies:target~.topics .chip[data-topic=case-studies]{background:var(--ink);color:#fff;border-color:var(--ink)}#topic-getting-started:target~.gi-featured:not([data-topic=getting-started]),#topic-getting-started:target~.guide-grid .gcard:not([data-topic=getting-started]),#topic-welcome-emails:target~.gi-featured:not([data-topic=welcome-emails]),#topic-welcome-emails:target~.guide-grid .gcard:not([data-topic=welcome-emails]),#topic-signup-pages:target~.gi-featured:not([data-topic=signup-pages]),#topic-signup-pages:target~.guide-grid .gcard:not([data-topic=signup-pages]),#topic-deliverability:target~.gi-featured:not([data-topic=deliverability]),#topic-deliverability:target~.guide-grid .gcard:not([data-topic=deliverability]),#topic-tools-you-already-pay-for:target~.gi-featured:not([data-topic=tools-you-already-pay-for]),#topic-tools-you-already-pay-for:target~.guide-grid .gcard:not([data-topic=tools-you-already-pay-for]),#topic-case-studies:target~.gi-featured:not([data-topic=case-studies]),#topic-case-studies:target~.guide-grid .gcard:not([data-topic=case-studies]){display:none}.gpanel{text-align:center;justify-content:center;align-items:center;padding:24px;display:flex;overflow:hidden}.gpanel span{font-family:var(--font-display);letter-spacing:-.02em;overflow-wrap:anywhere;font-weight:800;line-height:1.05}.gpanel-md{height:180px}.gpanel-md span{font-size:30px}.gpanel-lg{flex:420px;min-height:340px}.gpanel-lg span{font-size:clamp(34px,4vw,52px)}.gpanel-img{object-fit:cover;width:100%;padding:0;display:block}.gpanel-hl{background:var(--hl);color:var(--hl-ink)}.gpanel-tint{background:var(--tint);color:var(--body)}.gpanel-ink{background:var(--ink);color:var(--on-ink-3)}.gi-featured{padding-bottom:48px}.feat{border-radius:var(--r-panel);background:var(--ink);color:var(--on-ink);flex-wrap:wrap;text-decoration:none;display:flex;overflow:hidden}.feat:hover{color:var(--on-ink)}.feat:hover .feat-title{text-underline-offset:4px;text-decoration:underline 2px}.feat:focus-visible{outline:3px solid var(--accent);outline-offset:4px;border-radius:var(--r-panel)}.feat-body{flex-direction:column;flex:480px;gap:18px;min-width:0;padding:clamp(28px,4vw,48px);display:flex}.feat-label{letter-spacing:.06em;text-transform:uppercase;color:var(--hl);font-size:14px;font-weight:700}.feat-title{font-family:var(--font-display);letter-spacing:-.02em;color:var(--on-ink);overflow-wrap:break-word;margin:0;font-size:clamp(30px,3.4vw,44px);font-weight:800;line-height:1.06}.feat-desc{color:var(--on-ink-2);font-size:18px;line-height:1.55}.feat-meta{color:var(--on-ink-3);font-size:15px}@media (width<=539px){.feat .gpanel-lg{flex-basis:100%;min-height:220px}.feat-body{flex-basis:100%}}.guide-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:22px;margin:0;padding:8px 0 72px;list-style:none;display:grid}.gcard{min-width:0;display:flex}.gcard-link{background:var(--surface);width:100%;color:var(--ink);border-radius:26px;flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.gcard-link:hover{color:var(--ink)}.gcard-link:hover .gcard-title{color:var(--accent)}.gcard-link:focus-visible{outline:3px solid var(--accent);outline-offset:4px;border-radius:26px}.gcard-body{flex-direction:column;gap:12px;padding:26px;display:flex}.gcard-title{font-family:var(--font-display);letter-spacing:-.01em;overflow-wrap:break-word;margin:0;font-size:25px;font-weight:800;line-height:1.15}.gcard-desc{color:var(--body);font-size:16px;line-height:1.5}.gcard-meta{color:var(--muted);font-size:14px}.signup label{color:var(--ink);font-size:15px;font-weight:600}.signup input[type=email]{min-width:0;font:inherit;border-radius:var(--r-field);border:2px solid var(--ink);background:var(--surface);min-height:48px;color:var(--ink);padding:13px 16px;font-size:16px}.signup input[type=email]::placeholder{color:var(--muted)}.signup-btn{font:inherit;border-radius:var(--r-field);background:var(--ink);color:#fff;cursor:pointer;border:0;min-height:48px;padding:0 24px;font-size:16px;font-weight:600}.signup-btn:hover{background:#0b1428}.signup :focus-visible{outline:3px solid var(--ink);outline-offset:3px}.signup-hp{width:1px;height:1px;position:absolute;left:-10000px;overflow:hidden}.signup-form{flex-direction:column;gap:10px;min-width:0;display:flex}.signup-wide{background:var(--hl);border-radius:var(--r-panel);color:var(--ink);flex-wrap:wrap;align-items:center;gap:32px;padding:clamp(28px,4vw,48px);display:flex}.signup-wide .signup-copy{flex-direction:column;flex:420px;gap:12px;min-width:0;display:flex}.signup-wide h2{margin:0;font-size:clamp(30px,3.4vw,44px);line-height:1.06}.signup-wide .signup-copy p{color:var(--ink);font-size:18px;line-height:1.55}.signup-wide .signup-form{flex:380px}.signup-row{flex-wrap:wrap;gap:10px;display:flex}.signup-row input{flex:220px}.signup-fine{color:var(--hl-ink);font-size:14px}.signup-side{background:var(--tint);color:var(--ink);border-radius:24px;flex-direction:column;gap:10px;padding:26px;display:flex}.signup-side-title{font-family:var(--font-display);font-size:22px;font-weight:800;line-height:1.15}.signup-side label{font-size:14px}.signup-side .signup-btn{width:100%}.ga-head{max-width:900px;padding:clamp(32px,5vw,48px) var(--gutter) 32px;flex-direction:column;gap:20px;margin:0 auto;display:flex}.ga-head .crumbs-v2{margin-bottom:-12px}.ga-title{font-family:var(--font-display);letter-spacing:-.03em;overflow-wrap:break-word;font-size:clamp(40px,5.4vw,68px);font-weight:800;line-height:1}.ga-dek{color:var(--body);font-size:clamp(19px,2.2vw,22px);line-height:1.5}.ga-part,.ga-back{color:var(--muted);font-size:15px}.ga-part a,.ga-back a{color:var(--ink);overflow-wrap:anywhere;padding:10px 0;font-weight:600;display:inline-block}.ga-part a:hover,.ga-back a:hover{color:var(--accent)}.ga-part{margin-top:-8px}.ga-author{flex-wrap:wrap;align-items:center;gap:14px;padding-top:8px;display:flex}.ga-author-photo{object-fit:cover;border-radius:50%;flex:none;width:52px;height:52px}.ga-author-text{flex-direction:column;gap:2px;min-width:0;display:flex}.ga-author-name{color:var(--ink);align-self:flex-start;align-items:center;min-height:44px;font-size:17px;font-weight:700;text-decoration:none;display:inline-flex}.ga-author-name:hover{color:var(--accent);text-decoration:underline}.ga-meta{color:var(--muted);font-size:15px}.ga-hero{padding-bottom:48px}.ga-hero img{border-radius:var(--r-panel);width:100%;height:auto;display:block}.ga-row{flex-wrap:wrap;align-items:flex-start;gap:56px;padding-bottom:80px;display:flex}.ga-side{flex-direction:column;flex:260px;gap:20px;min-width:0;display:flex}.toc{background:var(--surface);border-radius:24px;flex-direction:column;gap:12px;padding:26px;font-size:16px;display:flex}.toc-label{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-size:14px;font-weight:700}.toc ul{flex-direction:column;gap:0;margin:0;padding:0;list-style:none;display:flex}.toc a{min-height:44px;color:var(--ink);overflow-wrap:anywhere;align-items:center;padding:4px 0;line-height:1.35;text-decoration:none;display:flex}.toc a:hover{color:var(--accent);text-decoration:underline}.g-body{min-width:0;max-width:700px;font-family:var(--font-serif);color:var(--article-ink);overflow-wrap:break-word;flex:999 560px;font-size:20px;line-height:1.7}.g-body>*{margin:0 0 24px}.g-body>:last-child{margin-bottom:0}.g-body h2{font-family:var(--font-display);letter-spacing:-.02em;color:var(--ink);overflow-wrap:anywhere;margin:44px 0 16px;scroll-margin-top:16px;font-size:32px;font-weight:800;line-height:1.15}.g-body h3{font-family:var(--font-display);letter-spacing:-.01em;color:var(--ink);overflow-wrap:anywhere;margin:32px 0 12px;scroll-margin-top:16px;font-size:24px;font-weight:800;line-height:1.2}.g-body h4{font-family:var(--font);color:var(--ink);margin:28px 0 8px;font-size:19px;font-weight:700}.g-body>h2:first-child,.g-body>h3:first-child,.g-body h2+*,.g-body h3+*{margin-top:0}.g-body a{color:var(--ink);text-underline-offset:3px;overflow-wrap:anywhere;text-decoration:underline 1px}.g-body a:hover{color:var(--accent)}.g-body strong{color:var(--ink);font-weight:600}.g-body ul,.g-body ol{padding-left:1.4em}.g-body li{padding-left:.2em}.g-body li+li,.g-body li>ul,.g-body li>ol{margin-top:.5em}.g-body li::marker{color:var(--muted)}.g-body blockquote{border-left:4px solid var(--field-line);color:var(--body);margin-left:0;margin-right:0;padding:4px 0 4px 22px;font-style:italic}.g-body blockquote p+p{margin-top:12px}.g-body code{background:var(--surface);border:1px solid var(--field-line);overflow-wrap:anywhere;border-radius:6px;padding:1px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82em}.g-body pre{background:var(--surface);border:1px solid var(--field-line);border-radius:14px;padding:16px 18px;font-size:16px;line-height:1.5;overflow-x:auto}.g-body pre code{font-size:inherit;overflow-wrap:normal;background:0 0;border:0;padding:0}.g-body img{border-radius:16px;max-width:100%;height:auto}.g-body hr{border:0;border-top:2px solid var(--field-line);margin:40px 0}.g-body .table-scroll{-webkit-overflow-scrolling:touch;background:var(--surface);border:1px solid var(--field-line);border-radius:16px;max-width:100%;margin:0 0 28px;overflow-x:auto}.g-body .table-scroll:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.g-body .table-scroll table{border-collapse:collapse;min-width:100%;font-family:var(--font);color:var(--ink);font-size:16px;line-height:1.5}.g-body .table-scroll th,.g-body .table-scroll td{text-align:left;vertical-align:top;border-bottom:1px solid var(--field-line);padding:12px 16px}.g-body .table-scroll th{background:var(--ground);color:var(--ink);font-weight:700}.g-body .table-scroll tr:last-child td{border-bottom:0}.g-body .try-this{font-family:var(--font);background:var(--hl);border-radius:24px;flex-direction:column;gap:10px;margin:8px 0 32px;padding:28px 30px;display:flex}.try-this-label{letter-spacing:.06em;text-transform:uppercase;color:var(--hl-ink);font-size:14px;font-weight:700}.try-this p:not(.try-this-label){color:var(--ink);font-size:19px;line-height:1.55}.try-this a{color:var(--ink)}.g-body .mid-cta{font-family:var(--font);background:var(--ink);color:var(--on-ink);border-radius:24px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;margin:16px 0 36px;padding:32px;display:flex}.mid-cta-text{flex-direction:column;flex:300px;gap:6px;min-width:0;display:flex}.mid-cta-title{font-family:var(--font-display);color:var(--on-ink);font-size:26px;font-weight:800;line-height:1.15}.mid-cta-sub{color:var(--on-ink-2);font-size:17px;line-height:1.5}.g-body .mid-cta .mid-cta-btn{color:#fff;white-space:normal;text-align:center;max-width:100%;text-decoration:none}.g-body .mid-cta .mid-cta-btn:hover{color:#fff}@media (width<=480px){.g-body .mid-cta{padding:26px 22px}.mid-cta .mid-cta-btn{width:100%}}.ga-bio-wrap{padding-bottom:64px}.ga-bio{background:var(--surface);border-radius:var(--r-card-lg);flex-wrap:wrap;align-items:center;gap:24px;padding:clamp(24px,4vw,36px);display:flex}.ga-bio-photo{object-fit:cover;border-radius:50%;flex:none;width:88px;height:88px}.ga-bio-text{flex-direction:column;flex:400px;gap:6px;min-width:0;display:flex}.ga-bio-name{font-family:var(--font-display);font-size:24px;font-weight:800;line-height:1.2}.ga-bio-body p{color:var(--body);font-size:17px;line-height:1.55}.ga-bio-body p+p{margin-top:10px}.ga-bio-link{color:var(--ink);align-self:flex-start;min-height:44px;padding:10px 0 0;font-weight:600;display:inline-block}.ga-bio-link:hover{color:var(--accent)}.ga-list{flex-direction:column;gap:28px;padding-bottom:64px;display:flex}.ga-list h2{letter-spacing:-.02em;margin:0;font-size:40px}.gtiles{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:20px;margin:0;padding:0;list-style:none;display:grid}.gtile{min-width:0;display:flex}.gtile .gtile-link{background:var(--surface);width:100%;color:var(--ink);border-radius:24px;flex-direction:column;gap:12px;padding:28px;text-decoration:none;display:flex}.gtile .gtile-link:hover{color:var(--ink)}.gtile .gtile-link:hover .gtile-title{color:var(--accent)}.gtile .gtile-link:focus-visible{outline:3px solid var(--accent);outline-offset:4px;border-radius:24px}.gtile-title{font-family:var(--font-display);letter-spacing:-.01em;overflow-wrap:break-word;margin:0;font-size:24px;font-weight:800;line-height:1.15}.gtile-desc{color:var(--body);font-size:16px;line-height:1.5}.ga-back{padding-bottom:clamp(56px,8vw,96px)}@media (width<=640px){.ga-list h2{font-size:32px}.ga-row{gap:40px;padding-bottom:56px}.g-body{font-size:19px}.g-body h2{font-size:28px}}.gauthor .crumbs-v2{margin-bottom:8px}.gauthor .crumbs-v2 a{color:var(--ink)}.gauthor .crumbs-v2 a:hover{color:var(--accent)}.gauthor .author-head{flex-wrap:wrap;align-items:center;gap:16px 24px;margin:8px 0 24px;display:flex}.gauthor .author-photo-lg{object-fit:cover;border-radius:50%;flex:none;width:120px;height:120px}.gauthor .author-head h1{margin:0 0 4px;font-size:clamp(34px,4.5vw,48px)}.gauthor .gauthor-bio p{color:var(--body);font-size:18px;line-height:1.65}.gauthor .gauthor-bio p+p{margin-top:14px}.gauthor-guides{margin-top:40px}.gauthor .gauthor-guides h2{margin:0 0 20px}.gauthor ul.gtiles{gap:20px;padding:0;display:grid}