/* Clarkflow.co — design system · blue & cream */
:root{
  --canvas:#f6f1e7; --paper:#fdfaf3; --ink:#151d2e; --ink-2:#2b3648;
  --muted:#5e6370; --soft:#646976;
  --line:#e5dccb; --line-strong:#d3c7b2;
  --accent:#1d4f9c; --accent-dark:#143a75; --accent-soft:#e7eef8; --accent-ink:#173e75;
  --cream-deep:#efe6d3;
  --dark:#122239; --dark-2:#1a2c47; --dark-line:#2c4062; --dark-muted:#a3b0c4;
  --shadow:0 18px 44px rgba(52,44,28,.10); --shadow-sm:0 6px 18px rgba(52,44,28,.08);
  --radius:14px; --radius-sm:9px;
  --font:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{color-scheme:light;scroll-behavior:smooth}
body{margin:0;background:var(--canvas);color:var(--ink);font:16px/1.6 var(--font);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent-ink);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{margin:0;line-height:1.08;letter-spacing:-.028em;font-weight:800}
h1{font-size:clamp(38px,5.6vw,66px);letter-spacing:-.042em}
h2{font-size:clamp(28px,3.6vw,44px);letter-spacing:-.035em}
h3{font-size:clamp(19px,1.8vw,24px);letter-spacing:-.02em}
p{margin:0}
.wrap{max-width:1160px;margin:0 auto;padding:0 clamp(18px,4vw,44px)}
.mono{font-family:var(--mono)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-ink);font-weight:600}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent)}
.lead{font-size:clamp(17px,1.6vw,20px);color:var(--ink-2);line-height:1.62}
.muted{color:var(--muted)}
.center{text-align:center}

/* header */
.site-head{position:sticky;top:0;z-index:40;background:rgba(246,241,231,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.03em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{width:32px;height:32px;border-radius:9px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:15px}
.brand-mark span{transform:translateX(1px)}
.site-nav{display:flex;align-items:center;gap:26px}
.site-nav a{font-size:14.5px;font-weight:600;color:var(--ink-2)}
.site-nav a:hover{color:var(--accent-ink);text-decoration:none}
.site-nav a.active{color:var(--accent-ink)}
.nav-toggle{display:none;background:none;border:1px solid var(--line-strong);border-radius:8px;padding:8px 11px;font-size:13px;font-weight:700;cursor:pointer;color:var(--ink)}
@media(max-width:820px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:8px 0;display:none;box-shadow:var(--shadow-sm)}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px clamp(18px,4vw,44px)}
  .head-inner .btn{display:none}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 24px;border-radius:10px;font-size:15px;font-weight:700;border:1.5px solid transparent;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease;white-space:nowrap}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(29,79,156,.24)}
.btn-primary:hover{background:var(--accent-dark)}
.btn-dark{background:var(--dark);color:#fff}
.btn-dark:hover{background:#0b182b}
.btn-outline{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--ink);background:rgba(18,20,29,.04)}
.btn-light{background:#fff;color:var(--dark)}
.btn-light:hover{background:var(--cream-deep)}
.btn-sm{padding:10px 17px;font-size:13.5px}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* hero */
.hero{padding:clamp(52px,7vw,96px) 0 clamp(40px,5vw,64px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,64px);align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero h1{margin:18px 0 20px}
.hero h1 em{font-style:normal;color:var(--accent-ink);position:relative}
.hero .lead{max-width:520px}
.hero .btn-row{margin-top:30px}
.hero-note{margin-top:18px;font-size:13px;color:var(--soft);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hero-note strong{color:var(--ink-2)}

/* race visual */
.race{background:var(--dark);border-radius:20px;padding:clamp(20px,3vw,30px);color:#fff;box-shadow:0 30px 70px rgba(18,34,57,.28)}
.race-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}
.race-title{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dark-muted)}
.race-live{display:flex;align-items:center;gap:7px;font-family:var(--mono);font-size:11px;color:#8dc2f0}
.race-live i{width:7px;height:7px;border-radius:50%;background:#5aa9f5;animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.race-row{padding:15px 0;border-top:1px solid var(--dark-line)}
.race-row:first-of-type{border-top:0}
.race-label{display:flex;justify-content:space-between;align-items:baseline;gap:10px;font-size:13.5px;margin-bottom:9px}
.race-label .who{color:#eaf0fa;font-weight:600}
.race-time{font-family:var(--mono);font-size:12px}
.race-bar{height:9px;border-radius:99px;background:#22385a;overflow:hidden}
.race-fill{height:100%;border-radius:99px;transform-origin:left;animation:grow 1.2s cubic-bezier(.2,.7,.2,1) both}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.race-fill.fast{background:linear-gradient(90deg,#3c7fd4,#7db8f5)}
.race-fill.slow{background:#33496b}
.race-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--dark-line);display:flex;justify-content:space-between;align-items:center;gap:12px}
.race-foot .stat{font-family:var(--mono);font-size:26px;font-weight:700;color:#7db8f5;letter-spacing:-.02em}
.race-foot .stat-label{font-size:11.5px;color:var(--dark-muted);max-width:190px;line-height:1.5}

/* stat band */
.band{background:var(--dark);color:#fff;padding:clamp(44px,5vw,64px) 0}
.band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,40px)}
@media(max-width:820px){.band-grid{grid-template-columns:1fr;gap:26px}}
.band .stat-num{font-family:var(--mono);font-size:clamp(38px,4.6vw,54px);font-weight:700;letter-spacing:-.03em;color:#fff;line-height:1}
.band .stat-num .u{color:#7db8f5}
.band .stat-label{margin-top:12px;font-size:15px;color:#c2cede;line-height:1.55;max-width:300px}
.band .source{margin-top:8px;font-family:var(--mono);font-size:11px;color:#7c8ba3;letter-spacing:.04em}

/* sections */
.section{padding:clamp(56px,7vw,96px) 0}
.section.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:clamp(30px,4vw,52px)}
.sec-head h2{margin:14px 0 16px}
.sec-head.center{margin-left:auto;margin-right:auto}

/* problem list */
.leak-list{display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(28px,4vw,56px)}
@media(max-width:820px){.leak-list{grid-template-columns:1fr}}
.leak{display:flex;gap:18px;padding:24px 0;border-bottom:1px solid var(--line)}
.leak-x{flex:0 0 34px;width:34px;height:34px;border-radius:10px;background:#f0dfd9;color:#a6413d;display:grid;place-items:center;font-family:var(--mono);font-size:15px;font-weight:700}
.leak h3{font-size:17px;margin-bottom:6px}
.leak p{font-size:14.5px;color:var(--muted);line-height:1.6}

/* service rows */
.svc{display:grid;grid-template-columns:64px 1fr auto;gap:clamp(16px,3vw,36px);align-items:start;padding:clamp(28px,3.5vw,42px) 0;border-bottom:1px solid var(--line)}
.svc:first-child{border-top:1px solid var(--line)}
@media(max-width:820px){.svc{grid-template-columns:1fr}.svc-num{margin-bottom:-8px}}
.svc-num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent-ink);letter-spacing:.1em;padding-top:6px}
.svc h3{margin-bottom:12px}
.svc .svc-desc{font-size:15.5px;color:var(--muted);line-height:1.65;max-width:620px}
.svc .feat{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.svc .feat li{font-family:var(--mono);font-size:11.5px;letter-spacing:.03em;padding:6px 11px;border:1px solid var(--line-strong);border-radius:99px;color:var(--ink-2);background:var(--paper)}
.svc-link{font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-ink);white-space:nowrap;padding-top:8px}
.svc-link:hover{text-decoration:none}
.svc-link .arrow{display:inline-block;transition:transform .16s ease}
.svc-link:hover .arrow{transform:translateX(4px)}

/* outcome cards */
.outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:920px){.outcomes{grid-template-columns:1fr}}
.outcome{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:12px;transition:transform .18s ease,box-shadow .18s ease}
.outcome:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.outcome .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);font-weight:600}
.outcome .big{font-family:var(--mono);font-size:34px;font-weight:700;letter-spacing:-.03em;color:var(--ink)}
.outcome p{font-size:14px;color:var(--muted);line-height:1.6}
.outcome .who{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--soft)}
.fineprint{margin-top:22px;font-size:12.5px;color:var(--soft);max-width:640px;line-height:1.6}

/* process */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,3vw,32px)}
@media(max-width:820px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding-top:28px;border-top:2px solid var(--ink)}
.step .n{position:absolute;top:-2px;left:0;background:var(--accent);color:#fff;font-family:var(--mono);font-size:12px;font-weight:700;padding:3px 10px;border-radius:0 0 6px 6px}
.step h3{font-size:19px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted);line-height:1.6}

/* cta band */
.cta{background:var(--dark);color:#fff;border-radius:22px;padding:clamp(36px,5vw,64px);display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(24px,4vw,48px);align-items:center}
@media(max-width:820px){.cta{grid-template-columns:1fr}}
.cta h2{color:#fff;margin-bottom:14px}
.cta p{color:#c2cede;font-size:16.5px;line-height:1.6;max-width:520px}
.cta .btn-row{justify-content:flex-start}
.cta-side{background:var(--dark-2);border:1px solid var(--dark-line);border-radius:14px;padding:22px}
.cta-side .q{font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#8fa2bd;margin-bottom:12px}
.cta-side ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.cta-side li{font-size:14px;color:#e4ecf8;display:flex;gap:10px;line-height:1.5}
.cta-side li::before{content:"\2192";color:#7db8f5;font-family:var(--mono)}

/* page hero (subpages) */
.page-hero{padding:clamp(44px,5.5vw,76px) 0 clamp(30px,4vw,48px);border-bottom:1px solid var(--line)}
.page-hero h1{margin:16px 0 18px;font-size:clamp(34px,4.6vw,56px);max-width:840px}
.page-hero .lead{max-width:680px}

/* detail blocks */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,4.5vw,64px);align-items:start}
@media(max-width:920px){.detail{grid-template-columns:1fr}}
.detail-list{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:12px}
.detail-list li{display:flex;gap:12px;font-size:15px;color:var(--ink-2);line-height:1.55}
.detail-list li::before{content:"\2713";color:var(--accent);font-weight:800;flex:0 0 auto}
.panel-dark{background:var(--dark);color:#fff;border-radius:18px;padding:clamp(22px,3vw,32px)}
.panel-dark .q{font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#8fa2bd;margin-bottom:14px}
.panel-dark .kpi{padding:16px 0;border-top:1px solid var(--dark-line);display:flex;justify-content:space-between;align-items:baseline;gap:14px}
.panel-dark .kpi:first-of-type{border-top:0;padding-top:0}
.panel-dark .kpi .k{font-size:14px;color:#c2cede;line-height:1.5}
.panel-dark .kpi .v{font-family:var(--mono);font-size:22px;font-weight:700;color:#7db8f5;white-space:nowrap}
.flow-strip{display:flex;flex-wrap:wrap;align-items:center;gap:10px 30px;margin-top:24px}
.flow-strip .fchip{position:relative;font-family:var(--mono);font-size:11.5px;letter-spacing:.03em;padding:8px 13px;background:var(--accent-soft);border:1px solid #c8d8ee;border-radius:8px;color:var(--accent-ink);font-weight:600}
.flow-strip .fchip + .fchip::before{content:"\2192";position:absolute;left:-21px;top:50%;transform:translateY(-50%);color:var(--soft);font-family:var(--mono)}

/* faq */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:18px;font-size:17.5px;font-weight:700;letter-spacing:-.015em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--accent-ink);transition:transform .18s ease;flex:0 0 auto}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .answer{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.68;max-width:700px}

/* contact */
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(26px,4vw,56px);align-items:start}
@media(max-width:920px){.contact-grid{grid-template-columns:1fr}}
.form-card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:clamp(22px,3vw,34px);box-shadow:var(--shadow-sm)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:7px;color:var(--ink-2)}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line-strong);border-radius:10px;font:inherit;font-size:15px;background:#fff;color:var(--ink);transition:border-color .15s ease,box-shadow .15s ease}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(29,79,156,.16)}
.field textarea{resize:vertical;min-height:120px}
.field .err{display:none;color:#a6413d;font-size:12px;margin-top:6px}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#a6413d}
.field.invalid .err{display:block}
.contact-side .item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-side .item:first-child{padding-top:0}
.contact-side .ic{flex:0 0 38px;width:38px;height:38px;border-radius:11px;background:var(--accent-soft);color:var(--accent-ink);display:grid;place-items:center;font-family:var(--mono);font-size:13px;font-weight:700}
.contact-side h3,.contact-side h2{font-size:16px;margin-bottom:4px}
.contact-side p{font-size:14px;color:var(--muted);line-height:1.6}
.form-note{font-size:12.5px;color:var(--soft);margin-top:14px;line-height:1.6}

/* footer */
.site-foot{background:var(--dark);color:#a9b6c9;padding:clamp(40px,5vw,60px) 0 30px;margin-top:clamp(48px,6vw,88px)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:clamp(22px,4vw,48px);padding-bottom:32px;border-bottom:1px solid var(--dark-line)}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr;gap:28px}}
.site-foot .brand{color:#fff}
.site-foot .brand-mark{background:#fff;color:var(--accent)}
.foot-blurb{margin-top:14px;font-size:14px;line-height:1.65;max-width:330px}
.foot-col h2{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#7c8ba3;font-weight:600;margin-bottom:14px}
.foot-col a{display:block;color:#c2cede;font-size:14.5px;padding:5px 0}
.foot-col a:hover{color:#fff;text-decoration:none}
.foot-bottom{padding-top:22px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-family:var(--mono);font-size:11.5px;letter-spacing:.03em;color:#7c8ba3}
.foot-bottom a{color:#7c8ba3}

/* a11y */
.skip-link{position:absolute;top:-64px;left:16px;z-index:60;background:var(--accent);color:#fff;padding:11px 18px;border-radius:0 0 10px 10px;font-weight:700;font-size:14px;transition:top .15s ease}
.skip-link:focus{top:0;text-decoration:none}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.btn:focus-visible{outline:3px solid var(--ink);outline-offset:2px}

/* tidy utilities (replace one-off inline styles) */
.h-gap{margin:14px 0 16px}
.mt-12{margin-top:12px}
.mt-26{margin-top:26px}
.mt-36{margin-top:36px}
.steps-gap{margin-top:clamp(24px,3vw,40px)}
.w-full{width:100%}
.pt-0{padding-top:0}
.pt-cta{padding-top:clamp(40px,5vw,64px)}
.panel-note{margin-top:18px;font-size:12px;color:#8fa2bd;line-height:1.6}
.form-title{font-size:19px;margin-bottom:8px}
.form-intro{font-size:14px;color:var(--muted);margin-bottom:22px}
.race-time.dim{color:#8fa2bd}

/* proof, story & stat blocks */
.proof-line{border-left:3px solid var(--accent);background:var(--paper);border-radius:0 12px 12px 0;padding:14px 18px;max-width:520px;margin-top:24px}
.proof-line .q{font-size:16.5px;font-weight:700;letter-spacing:-.012em;line-height:1.45;color:var(--ink)}
.proof-line .src{margin-top:6px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.leak-stats{display:flex;flex-wrap:wrap;gap:clamp(22px,3vw,48px);margin:6px 0 38px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.leak-stats .ls{flex:1 1 230px;max-width:380px}
.leak-stats .num{font-family:var(--mono);font-size:clamp(30px,3.6vw,42px);font-weight:700;letter-spacing:-.03em;line-height:1;color:var(--ink)}
.leak-stats .lbl{margin-top:9px;font-size:14px;color:var(--muted);line-height:1.55}
.leak-stats .src{margin-top:7px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--soft)}
.story{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:0 16px 16px 0;padding:clamp(22px,3vw,34px);max-width:780px;margin-top:clamp(28px,3.5vw,42px)}
.story .k{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);font-weight:600}
.story p{margin-top:14px;font-size:16px;line-height:1.72;color:var(--ink-2)}
.story .turn{margin-top:18px;font-size:18.5px;font-weight:800;letter-spacing:-.022em;line-height:1.5;color:var(--ink)}
.tier-price{text-align:right;padding-top:4px;min-width:180px}
.tier-price .from{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}
.tier-price .amount{display:block;font-family:var(--mono);font-size:21px;font-weight:700;letter-spacing:-.02em;color:var(--ink);margin:2px 0 10px}
@media(max-width:820px){.tier-price{text-align:left;margin-top:6px}}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}