:root{
  --bg:#FFFFFF; --tint:#ECF2F4; --ink:#1C2B39; --muted:#5A6B79; --line:#D6DFE4;
  --navy:#1C2B39; --on-navy:#FFFFFF; --on-navy-muted:#B7C4CE; --navy-line:#34485A;
  --accent:#0F5D9B; --accent-ink:#FFFFFF; --cyan:#0092BC; --sel:#E6F0F7; --warn:#A4560C;
  --cta:#1470B8; --cta-ink:#FFFFFF;
  --font:"Hanken Grotesk","Helvetica Neue",Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#111C25; --tint:#17242F; --ink:#E7EEF2; --muted:#9AABB8; --line:#2A3B49;
  --navy:#0B141B; --navy-line:#2A3B49; --accent:#4C9FDB; --accent-ink:#08131C; --cyan:#33BCE2; --sel:#173049; --warn:#E3A35C;
  --cta:#1F6FB5; --cta-ink:#FFFFFF; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#111C25; --tint:#17242F; --ink:#E7EEF2; --muted:#9AABB8; --line:#2A3B49;
  --navy:#0B141B; --navy-line:#2A3B49; --accent:#4C9FDB; --accent-ink:#08131C; --cyan:#33BCE2; --sel:#173049; --warn:#E3A35C;
  --cta:#1F6FB5; --cta-ink:#FFFFFF; color-scheme:dark}
[hidden]{display:none!important}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.55 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
:root{--page:1200px;--pad:24px;--head:64px}
html{scrollbar-gutter:stable}
@media(max-width:520px){:root{--pad:14px;--head:56px}}
.inner{max-width:var(--page);margin:0 auto;padding-inline:var(--pad)}
.narrow{max-width:640px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* header */
.top{background:var(--navy);color:var(--on-navy);position:sticky;top:0;z-index:5;border-bottom:1px solid var(--navy-line)}
.top .inner{display:flex;align-items:center;justify-content:space-between;gap:12px;height:var(--head);padding-block:0}
.brand{font:700 22px/1 var(--font);letter-spacing:-.02em;display:flex;align-items:center;gap:.28em;color:inherit;text-decoration:none}
.brand i{width:28px;height:23px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 40'%3E%3Cpath d='M3 40 19 12l16 28z' fill='%23fff'/%3E%3Cpath d='M20 40l12-20 13 20z' fill='%230092BC'/%3E%3C/svg%3E") no-repeat center/contain;display:inline-block;margin-right:3px}
.brand b{font-weight:700}.brand span{font-weight:300}
.nav{display:flex;align-items:center;gap:24px}
.nav a.l{color:var(--on-navy-muted);text-decoration:none;font:500 14px var(--font)}
.nav a.l:hover{color:var(--on-navy)}
@media(max-width:640px){.nav a.l:not(#signin-link){display:none}.nav{gap:14px}}

/* buttons */
.btn{display:inline-block;border:0;border-radius:3px;padding:13px 24px;font:600 16px var(--font);cursor:pointer;text-decoration:none;text-align:center}
.btn.cta{background:var(--cta);color:var(--cta-ink);box-shadow:inset 0 0 0 1px rgba(255,255,255,.28)}
.btn.cta:hover{filter:brightness(1.08)}
.btn.sm{padding:9px 16px;font-size:14px}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.lg{padding:16px 30px;font-size:18px}
.btn.line{background:none;color:var(--on-navy);box-shadow:inset 0 0 0 1px var(--on-navy-muted)}
.ghost{background:none;border:0;color:var(--accent);font:600 15px var(--font);cursor:pointer;padding:6px 0}

/* hero */
.hero{background:var(--navy);color:var(--on-navy)}
.hero{position:relative;background:var(--navy) var(--hero-img,none) center 40%/cover no-repeat;min-height:560px;display:flex;align-items:center;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(11,20,27,.92) 0%,rgba(11,20,27,.78) 45%,rgba(11,20,27,.25) 100%)}
.hero .inner{padding-block:84px;width:100%}
.hero .copy{max-width:600px}
@media(max-width:860px){.hero{min-height:0}.hero::before{background:rgba(11,20,27,.82)}.hero .inner{padding-block:48px}}
.eyebrow{font:600 14px var(--font);color:var(--cyan);margin:0 0 12px}
h1{font:700 clamp(32px,6vw,52px)/1.08 var(--font);letter-spacing:-.02em;margin:0 0 18px;text-wrap:balance}
.lede{color:var(--on-navy-muted);font-weight:300;font-size:19px;margin:0 0 28px;max-width:52ch}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.fine{color:var(--on-navy-muted);font-size:14px;margin:14px 0 0}

/* sample email */
.phone{position:relative;width:340px;max-width:100%;margin:0 auto;background:#0B141B;border-radius:44px;padding:12px;box-shadow:0 18px 40px rgba(11,20,27,.28),inset 0 0 0 2px #2A3B49}
.notch{position:absolute;top:20px;left:50%;transform:translateX(-50%);width:92px;height:24px;background:#0B141B;border-radius:14px;z-index:3}
.screen{background:var(--bg);color:var(--ink);border-radius:34px;overflow:hidden;height:600px;display:flex;flex-direction:column}
.status{display:flex;justify-content:space-between;padding:12px 24px 6px;font-size:12px;font-weight:600;background:var(--bg)}
.mhead{padding:30px 16px 10px;border-bottom:1px solid var(--line);background:var(--bg)}
.from{display:flex;gap:10px;align-items:center}
.av{width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px}
.from b{display:block;font-size:14px}.from small{color:var(--muted);font-size:12px}
.subj{font-weight:700;font-size:16px;line-height:1.3;margin-top:10px}
.mail{flex:1;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.mail::-webkit-scrollbar{display:none}
.mail{background:#f3f6f9;color:#1b2733;font-family:Helvetica,Arial,sans-serif;padding:12px 8px}
.mail .card{background:#fff;border-top:3px solid #0092BC}
.mail .eh{background:#1C2B39;padding:13px 16px;display:flex;align-items:center;gap:9px;color:#fff;font-size:21px;line-height:1;letter-spacing:-.02em}
.mail .eh svg{width:32px;height:27px;flex:none}
.mail .eh b{font-weight:700}.mail .eh span{font-weight:400}
.mail .eb{padding:16px}
.mail .date{margin:0 0 3px;font-size:12px;color:#5b6773}
.mail h3{margin:6px 0 6px;font:700 16px/1.3 Helvetica,Arial,sans-serif;color:#1C2B39}
.mail h3.gap{margin-top:22px}
.mail .it{padding:12px 0;border-top:1px solid #d9e0e7}
.mail .o{font-size:11px;line-height:1.4;letter-spacing:.03em;text-transform:uppercase;color:#5b6773}
.mail .t{display:block;margin:3px 0;font-size:14.5px;line-height:1.35;font-weight:700;color:#0a5db0;text-decoration:underline}
.mail .cl{margin:0 0 5px;font-size:12px;line-height:1.4;color:#1b2733;font-weight:400}
.mail .cl span{color:#5b6773}
.mail .d{font-size:13px;line-height:1.5;color:#1b2733}

/* sections */
section.s{padding-block:68px}
section.s.alt{background:var(--tint);border-block:1px solid var(--line)}
@media(max-width:640px){section.s{padding-block:44px}}
h2{font:700 clamp(26px,4.4vw,36px)/1.15 var(--font);letter-spacing:-.015em;margin:0 0 12px;text-wrap:balance}
.sub{color:var(--muted);margin:0 0 32px;max-width:60ch}
.steps{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.steps>div{padding:22px 24px 8px 0}
.steps .n{font:700 14px var(--font);color:var(--cyan);font-variant-numeric:tabular-nums}
.steps h3{font:600 20px/1.3 var(--font);margin:6px 0 6px}
.steps p{margin:0 0 14px;color:var(--muted)}
@media(max-width:760px){.steps{grid-template-columns:1fr}.steps>div{border-bottom:1px solid var(--line);padding-right:0}}
.split{display:grid;grid-template-columns:1fr 380px;gap:64px;align-items:center}
@media(max-width:960px){.split{grid-template-columns:1fr}}
.why{align-self:center}
.why .sub{margin-bottom:24px}
details{border-bottom:1px solid var(--line)}
.faq{border-top:1px solid var(--line);max-width:760px}
summary{cursor:pointer;padding:16px 4px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"";flex:none;border-left:7px solid var(--cyan);border-top:5px solid transparent;border-bottom:5px solid transparent;transition:transform .15s}
details[open] summary::after{transform:rotate(90deg)}
details>p{margin:0;padding:0 4px 16px;color:var(--muted);max-width:62ch}
.band{background:var(--navy);color:var(--on-navy)}
.band .inner{padding-block:56px;display:flex;flex-wrap:wrap;gap:20px 40px;align-items:center;justify-content:space-between}
.band h2{margin:0;max-width:20ch}
.band p{margin:6px 0 0;color:var(--on-navy-muted);font-weight:300}
footer.site{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer.site .credit a{color:inherit}
footer.site .credit{flex-basis:100%;font-size:11px;font-style:italic;opacity:.7;margin-top:-6px}
footer.site .inner{padding-block:22px 16px;display:flex;flex-wrap:wrap;gap:8px 28px;justify-content:space-between}

/* sign-up flow (same layout as the survey: navy header band, white answer area, action bar) */
#flow{min-height:100vh;display:flex;flex-direction:column}
.fhero{background:var(--navy);color:var(--on-navy)}
.fhero .inner{padding-block:22px 34px;display:flex;flex-direction:column;gap:12px}
.fhero h1{font-size:clamp(28px,7vw,40px);margin:0}
.fhero .help{color:var(--on-navy-muted);font-weight:300;margin:0;max-width:60ch}
.pbar{height:4px;background:var(--line)}
.pbar i{display:block;height:100%;background:var(--cyan);transition:width .25s}
#flow main{flex:1;padding-block:26px 28px;display:flex;flex-direction:column;gap:22px}
.row{display:flex;flex-direction:column;gap:8px}
label.lbl{font-weight:600;font-size:15px}
input[type=text],input[type=email]{width:100%;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:3px;padding:13px 14px;font:16px var(--font)}
input::placeholder{color:var(--muted)}
.hint{font-size:14px;color:var(--muted)}
.err{color:var(--warn);font-size:14px;min-height:1.2em}
.chk{display:flex;gap:12px;align-items:flex-start;font-size:15px}
.chk input{margin-top:4px;width:18px;height:18px;flex:none;accent-color:var(--accent)}
.fbar{position:sticky;bottom:0;background:var(--bg);border-top:1px solid var(--line)}
.fbar .inner{display:flex;gap:12px;align-items:center;padding-block:12px calc(12px + env(safe-area-inset-bottom,0px))}
.fbar .primary{margin-left:auto}
.proto{background:var(--sel);border-left:3px solid var(--cyan);padding:10px 14px;font-size:14px;color:var(--ink);border-radius:3px}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* features page */
.fhero{background:var(--navy);color:var(--on-navy)}
.fhero .inner{padding-block:56px 52px}
.fhero h1{margin:0;max-width:20ch}
.fhero .lede{margin:0;max-width:56ch}
.grp{padding-block:56px 8px}
.grp:last-of-type{padding-bottom:60px}
.grp.alt{background:var(--tint);border-block:1px solid var(--line)}
.grp h2{margin:0 0 26px}
.grp .sub{margin-bottom:26px}
.fg{display:grid;grid-template-columns:repeat(2,1fr);column-gap:48px;border-top:1px solid var(--line)}
.fg>div{padding:20px 0 12px;border-bottom:1px solid var(--line)}
.fg h3{font:600 18px/1.3 var(--font);margin:0 0 6px}
.fg p{margin:0 0 10px;color:var(--muted)}
@media(max-width:760px){.fg{grid-template-columns:1fr}.fhero .inner{padding-block:40px 36px}.grp{padding-block:40px 4px}}

/* features: example email with numbered callouts */
.exgrid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:48px;align-items:start;padding-bottom:64px}
@media(max-width:900px){.exgrid{grid-template-columns:1fr;gap:32px}}
.exmail{border:1px solid var(--line);background:#fff;box-shadow:0 10px 30px rgba(11,20,27,.10)}
.exsubj{padding:14px 18px;border-bottom:1px solid #d9e0e7;color:#1b2733;background:#fff}
.exsubj b{display:block;font-size:15px}
.exsubj span{font-size:12px;color:#5b6773}
.exbody{background:#f3f6f9;color:#1b2733;font-family:Helvetica,Arial,sans-serif;padding:14px 12px 16px}
.exwrap .card{background:#fff;border-top:3px solid #0092BC}
.exwrap .eh{background:#1C2B39;padding:14px 18px;display:flex;align-items:center;gap:10px;color:#fff;font-size:23px;line-height:1;letter-spacing:-.02em}
.exwrap .eh svg{width:36px;height:30px;flex:none}
.exwrap .eh b{font-weight:700}.exwrap .eh span{font-weight:400}
.exwrap .eb{padding:18px}
.exwrap .date{margin:0 0 3px;font-size:12px;color:#5b6773}
.exwrap h3{margin:6px 0 6px;font:700 17px/1.3 Helvetica,Arial,sans-serif;color:#1C2B39}
.exwrap h3.gap{margin-top:22px}
.exwrap .it{padding:13px 0;border-top:1px solid #d9e0e7}
.exwrap .o{font-size:11px;line-height:1.4;letter-spacing:.03em;text-transform:uppercase;color:#5b6773}
.exwrap .t{display:inline;margin:3px 0;font-size:15px;line-height:1.4;font-weight:700;color:#0a5db0;text-decoration:underline}
.exwrap .cl{margin:3px 0 5px;font-size:12.5px;line-height:1.5;color:#1b2733}
.exwrap .cl span{color:#5b6773}
.exwrap .fl{margin:0 0 5px;font-size:12px;color:#5b6773}
.exwrap .d{font-size:13.5px;line-height:1.5;color:#1b2733}
.exatt{margin:12px 6px 0;background:#fff;border:1px solid #d9e0e7;padding:10px 12px;display:flex;align-items:center;gap:12px;font-family:Helvetica,Arial,sans-serif;color:#1b2733}
.exatt .xl{background:#1C2B39;color:#fff;font:700 11px/1 Helvetica,Arial,sans-serif;padding:9px 8px;letter-spacing:.04em}
.exatt b{display:block;font-size:13px}.exatt small{color:#5b6773;font-size:12px}
.exatt .pin{margin-left:auto}
.pin{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#0092BC;color:#fff;font:700 12px/1 var(--font);vertical-align:middle;margin-left:6px;flex:none}
.callouts{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.callouts li{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.callouts .pin{margin:2px 0 0;width:24px;height:24px;font-size:13px}
.callouts h3{font:600 17px/1.3 var(--font);margin:0 0 2px}
.callouts p{margin:0;color:var(--muted)}
@media(min-width:901px){.callouts{position:sticky;top:90px}}

/* features: six factors with icons */
.ft{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.ft>div{padding:24px 28px 26px 0;border-bottom:1px solid var(--line)}
.ft .ico{display:block;width:38px;height:38px;color:var(--accent);margin-bottom:14px}
.ft .ico svg{width:38px;height:38px;stroke-width:1.5}
.ft h3{font:600 18px/1.3 var(--font);margin:0 0 4px}
.ft p{margin:0 0 4px;color:var(--muted);max-width:30ch}
@media(max-width:860px){.ft{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.ft{grid-template-columns:1fr}.ft>div{padding-right:0}}
.hero h1{margin-bottom:30px}

@media(max-width:520px){
  .brand{font-size:17px;gap:6px}
  .brand i{width:21px;height:17px}
  .appnav,.nav,.topnav{gap:12px}
  .appnav .toplink,.nav a.l,.toplink{font-size:12.5px}
}