/* ============================================================
   jacobdart.com — calm-light "operating system" design system
   Self-hosted Source Serif 4 (display) + Red Hat Text (body).
   Metric-matched fallbacks → ~zero font-swap CLS.
   ============================================================ */

/* ---- real faces ---- */
@font-face{font-family:"Source Serif 4";src:url("fonts/SourceSerif4-Regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("fonts/SourceSerif4-Italic.woff2") format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("fonts/SourceSerif4-Semibold.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("fonts/SourceSerif4-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"Red Hat Text";src:url("fonts/RedHatText-Regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Red Hat Text";src:url("fonts/RedHatText-Medium.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Red Hat Text";src:url("fonts/RedHatText-SemiBold.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Red Hat Text";src:url("fonts/RedHatText-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}

/* ---- metric-matched fallback faces (hold layout until real font paints) ---- */
@font-face{font-family:"SS4 Fallback";src:local("Times New Roman");ascent-override:96.8%;descent-override:29.8%;line-gap-override:0%;size-adjust:105.6%}
@font-face{font-family:"RHT Fallback";src:local("Arial");ascent-override:101.8%;descent-override:27%;line-gap-override:0%;size-adjust:96.5%}

:root{
  /* palette — warm off-white + a calm, trustworthy navy */
  --bg:#f7f5ef;
  --bg-tint:#f1eee4;
  --surface:#fffefb;
  --surface-2:#fbfaf5;
  --ink:#19222e;
  --ink-soft:#2b3645;
  --muted:#5c6470;
  --faint:#8b9099;
  --line:#e6e0d3;
  --line-2:#ded7c6;
  --accent:#1c3c74;          /* THE navy */
  --accent-2:#2f57a0;        /* lighter / hover */
  --accent-ink:#ffffff;
  --accent-soft:rgba(28,60,116,.06);
  --accent-softer:rgba(28,60,116,.035);
  --sand:#b9852f;            /* sparing warm tick (success/value) */
  --green:#2e7d57; --amber:#b07a1e; --red:#b23b2e;

  --shadow:0 1px 2px rgba(25,34,46,.04), 0 14px 40px rgba(25,34,46,.07);
  --shadow-sm:0 1px 2px rgba(25,34,46,.05), 0 4px 14px rgba(25,34,46,.05);

  --serif:"Source Serif 4","SS4 Fallback","Times New Roman",Georgia,serif;
  --sans:"Red Hat Text","RHT Fallback",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;

  --maxw:1140px;
  --readw:680px;
  --radius:16px;
  --radius-sm:11px;
  --radius-lg:22px;
  --pad:clamp(20px,5vw,36px);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.65;font-weight:400;
  letter-spacing:.002em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-2)}
::selection{background:rgba(28,60,116,.14)}

/* ---- layout ---- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.section{padding:clamp(56px,9vw,104px) 0;border-top:1px solid var(--line)}
.section.tint{background:var(--bg-tint)}
.section.plain{border-top:none}
.eyebrow{font-family:var(--sans);font-weight:600;font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 18px}
.eyebrow.muted{color:var(--faint)}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--muted);background:var(--accent-soft);border:1px solid var(--line-2);padding:5px 13px;border-radius:999px}
.lead{font-size:clamp(18px,2.2vw,21px);line-height:1.55;color:var(--ink-soft);max-width:var(--readw)}
.muted{color:var(--muted)}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* ---- type ---- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;color:var(--ink);letter-spacing:-.012em;margin:0}
h1{font-size:clamp(40px,6.4vw,68px);line-height:1.02;font-weight:600}
h2{font-size:clamp(29px,4.2vw,42px);line-height:1.08;margin:0 0 14px}
h3{font-size:21px;line-height:1.25}
.display em,h1 em,h2 em{font-style:italic;color:var(--accent);font-weight:600}
p{margin:0 0 16px}
.section-head{max-width:760px;margin-bottom:clamp(34px,5vw,52px)}
.section-head.center{margin-left:auto;margin-right:auto}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--sans);
  font-weight:600;font-size:15.5px;line-height:1;padding:15px 24px;border-radius:12px;cursor:pointer;
  border:1px solid transparent;transition:transform .15s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;white-space:nowrap}
.btn .arr{transition:transform .18s ease}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--accent-2);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn-lg{padding:17px 30px;font-size:16.5px}
.btn-block{width:100%}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:30px}

/* ---- header / nav ---- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,245,239,.82);backdrop-filter:saturate(140%) blur(12px);
  -webkit-backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-weight:600;font-size:20px;color:var(--ink);letter-spacing:-.01em}
.brand:hover{color:var(--ink)}
.brand .mark{width:30px;height:30px;flex:0 0 auto}
.brand .sub{font-family:var(--sans);font-weight:500;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);border-left:1px solid var(--line-2);padding-left:11px;margin-left:3px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-family:var(--sans);font-weight:500;font-size:15px;color:var(--muted)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:14px}
@media(max-width:760px){.nav-links{display:none}.brand .sub{display:none}}

/* ---- hero ---- */
.hero{position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.55}
.hero .wrap{position:relative;z-index:1}
.hero-inner{padding:clamp(64px,10vw,118px) 0 clamp(54px,8vw,86px);max-width:920px}
.hero h1{margin:0 0 22px}
.hero .lead{font-size:clamp(18px,2.3vw,22px);max-width:600px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;font-size:14px;color:var(--muted)}
.hero-meta b{color:var(--ink);font-weight:600}
.hero-meta .dot{color:var(--line-2)}

/* ---- generic grids / cards ---- */
.grid{display:grid;gap:clamp(16px,2.4vw,22px)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:880px){.g-3,.g-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g-2,.g-3,.g-4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm)}
.card h3{margin:0 0 8px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card .num{font-family:var(--serif);font-weight:600;font-size:15px;color:var(--accent);letter-spacing:.02em}
.card .ic{width:38px;height:38px;border-radius:10px;background:var(--accent-soft);border:1px solid var(--line-2);
  display:grid;place-items:center;color:var(--accent);margin-bottom:16px}
.card .ic svg{width:20px;height:20px}

/* step cards (how it works) */
.step{position:relative}
.step .num{display:block;font-size:14px;margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.step .num b{font-size:30px;display:block;color:var(--ink);font-weight:600;letter-spacing:-.02em;margin-top:2px}

/* problem list */
.prob{display:flex;gap:15px;align-items:flex-start;padding:20px 0;border-bottom:1px solid var(--line)}
.prob:last-child{border-bottom:none}
.prob .rn{font-family:var(--serif);font-style:italic;font-size:17px;color:var(--accent);flex:0 0 auto;width:26px;line-height:1.6}
.prob h3{font-size:18px;margin:0 0 4px}
.prob p{margin:0;color:var(--muted);font-size:15.5px}

/* feature list with ticks */
.ticks{list-style:none;margin:0;padding:0}
.ticks li{position:relative;padding:9px 0 9px 30px;border-bottom:1px solid var(--line);color:var(--ink-soft);font-size:15.5px}
.ticks li:last-child{border-bottom:none}
.ticks li::before{content:"";position:absolute;left:2px;top:15px;width:16px;height:16px;border-radius:50%;
  background:var(--accent-soft);border:1px solid var(--accent)}
.ticks li::after{content:"";position:absolute;left:7px;top:18px;width:5px;height:8px;border:1.6px solid var(--accent);
  border-top:0;border-left:0;transform:rotate(42deg)}

/* ---- node-zero proof panel ---- */
.os-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.os-bar{display:flex;align-items:center;gap:8px;padding:13px 18px;border-bottom:1px solid var(--line);background:var(--surface-2)}
.os-bar .dot{width:10px;height:10px;border-radius:50%;background:var(--line-2)}
.os-bar .live{margin-left:auto;display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:600;color:var(--green);letter-spacing:.04em}
.os-bar .live i{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 0 rgba(46,125,87,.45);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(46,125,87,.4)}70%{box-shadow:0 0 0 7px rgba(46,125,87,0)}100%{box-shadow:0 0 0 0 rgba(46,125,87,0)}}
.os-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.os-stat{background:var(--surface);padding:22px 20px}
.os-stat .v{font-family:var(--serif);font-weight:600;font-size:clamp(26px,3.4vw,34px);line-height:1;color:var(--ink);letter-spacing:-.02em}
.os-stat .v small{font-size:16px;color:var(--muted);font-weight:600}
.os-stat .k{font-size:12.5px;color:var(--muted);margin-top:8px;letter-spacing:.02em}
.os-foot{padding:15px 20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);background:var(--surface-2)}
@media(max-width:680px){.os-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- offer / pricing ---- */
.offers{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
@media(max-width:920px){.offers{grid-template-columns:1fr}}
.offer{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;box-shadow:var(--shadow-sm);position:relative}
.offer.feature{border-color:var(--accent);box-shadow:0 2px 6px rgba(28,60,116,.1),0 22px 50px rgba(28,60,116,.13)}
.offer .tag{position:absolute;top:-12px;left:26px;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  background:var(--accent);color:#fff;padding:5px 12px;border-radius:999px}
.offer .step-lbl{font-size:12.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:10px}
.offer h3{font-size:24px;margin:0 0 4px}
.offer .price{font-family:var(--serif);font-weight:600;font-size:34px;color:var(--ink);letter-spacing:-.02em;margin:10px 0 2px}
.offer .price small{font-size:16px;color:var(--muted);font-weight:600;letter-spacing:0}
.offer .price-note{font-size:13.5px;color:var(--muted);margin:0 0 18px}
.offer .desc{font-size:15px;color:var(--muted);margin:0 0 18px}
.offer .ticks{margin-bottom:22px}
.offer .ticks li{font-size:14.5px;padding:7px 0 7px 28px}
.offer .ticks li::before{top:12px}.offer .ticks li::after{top:15px}
.offer .btn{margin-top:auto}
.guarantee{display:flex;gap:13px;align-items:flex-start;margin-top:26px;padding:18px 20px;background:var(--accent-softer);
  border:1px solid var(--line-2);border-radius:var(--radius);font-size:15px;color:var(--ink-soft)}
.guarantee svg{flex:0 0 auto;width:22px;height:22px;color:var(--accent);margin-top:1px}
.guarantee b{color:var(--ink)}

/* value-pricing callout */
.value-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(26px,4vw,40px);box-shadow:var(--shadow-sm);display:grid;grid-template-columns:1.2fr 1fr;gap:clamp(24px,4vw,44px);align-items:center}
@media(max-width:780px){.value-box{grid-template-columns:1fr}}
.value-math{display:flex;flex-direction:column;gap:10px}
.value-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}
.value-row:last-child{border-bottom:none}
.value-row .lab{font-size:14.5px;color:var(--muted)}
.value-row .val{font-family:var(--serif);font-weight:600;font-size:20px;color:var(--ink)}
.value-row.total .val{color:var(--accent);font-size:26px}
.value-row.total .lab{color:var(--ink);font-weight:600}

/* ---- FAQ ---- */
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;font-family:var(--serif);
  font-weight:600;font-size:19px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:28px;width:11px;height:11px;border-right:2px solid var(--accent);
  border-bottom:2px solid var(--accent);transform:rotate(45deg);transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(-135deg)}
.faq .a{padding:0 44px 24px 0;color:var(--muted);font-size:16px;margin:0}

/* ---- CTA band ---- */
.cta-band{background:var(--accent);color:#fff;border-radius:var(--radius-lg);padding:clamp(40px,6vw,68px);text-align:center;position:relative;overflow:hidden}
.cta-band h2{color:#fff;max-width:680px;margin:0 auto 14px}
.cta-band p{color:rgba(255,255,255,.82);max-width:540px;margin:0 auto 28px;font-size:18px}
.cta-band .btn-primary{background:#fff;color:var(--accent)}
.cta-band .btn-primary:hover{background:#eef2f8;color:var(--accent)}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.cta-band .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}

/* ---- sample form ---- */
.sample{display:flex;gap:10px;max-width:440px;margin:18px auto 0;flex-wrap:wrap;justify-content:center}
.sample input{flex:1;min-width:220px;font-family:var(--sans);font-size:15px;padding:14px 16px;border-radius:11px;
  border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.1);color:#fff}
.sample input::placeholder{color:rgba(255,255,255,.7)}
.sample input:focus{outline:2px solid rgba(255,255,255,.6);outline-offset:1px}
.sample .ok{color:#fff;font-weight:600;margin:8px 0 0}

/* ---- footer ---- */
.site-footer{background:var(--ink);color:#cdd3da;padding:clamp(48px,7vw,76px) 0 34px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;margin-bottom:40px}
@media(max-width:680px){.foot-grid{grid-template-columns:1fr 1fr}}
.site-footer .brand{color:#fff}
.site-footer .brand .sub{color:#8b94a3;border-color:#39424f}
.site-footer p{color:#9aa3b0;font-size:15px;max-width:34ch;margin:16px 0 0}
.foot-col h4{font-family:var(--sans);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:#7c8694;font-weight:600;margin:0 0 14px}
.foot-col a{display:block;color:#cdd3da;font-size:15px;padding:5px 0}
.foot-col a:hover{color:#fff}
.foot-bot{display:flex;flex-wrap:wrap;gap:10px 18px;justify-content:space-between;align-items:center;
  padding-top:24px;border-top:1px solid #2b333f;color:#7c8694;font-size:13.5px}
.foot-bot .tag{font-family:var(--serif);font-style:italic;color:#9aa3b0}

/* ---- misc ---- */
.hr-soft{height:1px;background:var(--line);border:0;margin:0}
.fade-up{opacity:0;transform:translateY(14px);animation:fadeUp .7s ease forwards}
@keyframes fadeUp{to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.fade-up{opacity:1;transform:none}}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:100}
.skip:focus{left:0}