/* Think Function — design tokens */
:root{
  --navy:#0E2340; --navy-2:#1F3864; --teal:#0F6B73; --teal-2:#1A7A8A;
  --green:#2F7D5B; --sage:#E6EFEA; --gold:#C4A55A; --gold-ink:#7A6224;
  --ink:#1B2433; --muted:#566173; --line:#DCE3EA; --bg:#FFFFFF; --bg-soft:#F4F7F9; --ivory:#FAF8F3;
  --radius:14px; --shadow:0 1px 2px rgba(14,35,64,.06),0 8px 24px rgba(14,35,64,.06);
  --max:1180px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --display:"Montserrat","Inter",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:var(--teal)}
a:hover{color:var(--navy)}
h1,h2,h3,h4{font-family:var(--display);color:var(--navy);line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:750}
h3{font-size:1.2rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:10px 14px;z-index:100}
.skip:focus{left:10px}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy)}
.brand img{width:38px;height:auto}
.brand b{font-family:var(--display);font-weight:800;letter-spacing:.08em;font-size:1rem;line-height:1}
.brand small{display:block;font-size:.62rem;letter-spacing:.22em;color:var(--gold-ink);font-weight:600;margin-top:3px}
.menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.menu>li{position:relative}
.menu a,.menu button.dd-toggle{display:block;padding:10px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:550;font-size:.95rem;background:none;border:0;font-family:inherit;cursor:pointer}
.menu a:hover,.menu button.dd-toggle:hover{background:var(--bg-soft);color:var(--navy)}
.menu a[aria-current="page"]{color:var(--teal)}
.dd-toggle::after{content:"";display:inline-block;margin-left:6px;width:6px;height:6px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-3px)}
.dropdown{position:absolute;top:100%;left:0;min-width:270px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:8px;list-style:none;margin:6px 0 0;display:none}
.menu li.open>.dropdown{display:block}
@media (hover:hover) and (min-width:961px){.menu li.has-dd:hover>.dropdown{display:block}}
.dropdown a{padding:10px 12px}
.dropdown a span{display:block;font-weight:400;font-size:.82rem;color:var(--muted)}
.menu .cta{background:var(--teal);color:#fff;margin-left:8px}
.menu .cta:hover{background:var(--navy);color:#fff}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:4px 0}
@media (max-width:960px){
  .site-header{backdrop-filter:none;-webkit-backdrop-filter:none;background:#fff}
  .burger{display:block}
  .menu{position:fixed;inset:72px 0 0 0;background:#fff;flex-direction:column;align-items:stretch;padding:16px 20px 40px;overflow:auto;display:none;gap:2px}
  body.nav-open .menu{display:flex}
  .dropdown{position:static;box-shadow:none;border:0;padding:0 0 0 12px;margin:0}
  .menu .cta{margin:12px 0 0;text-align:center}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:10px;font-weight:650;text-decoration:none;border:2px solid transparent;font-size:1rem;cursor:pointer;font-family:inherit;transition:background .15s,color .15s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--navy);color:#fff}
.btn-ghost{border-color:var(--navy);color:var(--navy);background:transparent}
.btn-ghost:hover{background:var(--navy);color:#fff}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:var(--gold);color:var(--navy)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}

/* Sections */
section{padding:84px 0}
.section-soft{background:var(--bg-soft)}
.section-ivory{background:var(--ivory)}
.eyebrow{display:inline-block;font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;font-weight:700;color:var(--teal);margin-bottom:12px}
.lead{font-size:1.18rem;color:var(--muted);max-width:720px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}
.section-head{max-width:760px;margin-bottom:40px}
.center.section-head{margin-left:auto;margin-right:auto}

/* Hero */
.hero{padding:90px 0 80px;background:linear-gradient(180deg,#fff 0%,var(--bg-soft) 100%);position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:56px;align-items:center}
.hero .tag{font-family:var(--display);font-weight:800;letter-spacing:.14em;font-size:.85rem;color:var(--gold-ink);margin-bottom:16px}
.hero h1 span{color:var(--teal)}
.hero-art{position:relative;aspect-ratio:1/1;max-width:440px;justify-self:center;width:100%}
.hero-art .ring{position:absolute;inset:0;border-radius:50%;background:radial-gradient(circle at 30% 30%,#E8F2F3,#fff 70%);border:1px solid var(--line)}
.hero-art img{position:absolute;inset:22%;width:56%}
.chip{position:absolute;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-weight:650;font-size:.85rem;color:var(--navy);box-shadow:var(--shadow);white-space:nowrap}
.chip::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--teal);margin-right:8px;vertical-align:middle}
.chip.c1{top:8%;left:-4%}.chip.c2{top:44%;right:-8%}.chip.c2::before{background:var(--green)}.chip.c3{bottom:8%;left:4%}.chip.c3::before{background:var(--gold)}
@media (max-width:880px){.hero-grid{grid-template-columns:1fr}.hero-art{max-width:320px}.chip.c2{right:0}.chip.c1{left:0}}

/* Cards */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card p{color:var(--muted)}
.card .more{margin-top:auto;font-weight:650;text-decoration:none}
.card .more::after{content:" →"}
.aud-card{text-decoration:none;color:inherit;border-top:5px solid var(--teal);transition:transform .15s,box-shadow .15s}
.aud-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(14,35,64,.12)}
.aud-card.green{border-top-color:var(--green)}.aud-card.navy{border-top-color:var(--navy)}.aud-card.gold{border-top-color:var(--gold)}
.aud-card .icon{width:46px;height:46px;border-radius:12px;background:var(--sage);display:grid;place-items:center;margin-bottom:16px;color:var(--teal)}
.aud-card .icon svg{width:24px;height:24px}
.badge{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:999px;background:var(--sage);color:var(--green);margin-bottom:12px;align-self:flex-start}
.badge.soon{background:#FBF4E3;color:var(--gold-ink)}
.badge.pilot{background:#E7EEF7;color:var(--navy-2)}

/* Lists */
.checks{list-style:none;padding:0;margin:0 0 1em}
.checks li{position:relative;padding-left:30px;margin-bottom:10px}
.checks li::before{content:"";position:absolute;left:0;top:7px;width:16px;height:16px;border-radius:50%;background:var(--teal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' stroke='white' stroke-width='2' fill='none'/%3E%3C/svg%3E") center/12px no-repeat}

/* Steps */
.steps{counter-reset:s;display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
@media (max-width:860px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:relative}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);font-family:var(--display);font-weight:800;font-size:2rem;color:var(--gold);display:block;margin-bottom:8px}
.phases{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.phases span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:650;color:var(--navy);font-size:.92rem}
.phases span:not(:last-child)::after{content:" →";color:var(--teal)}

/* Compare table */
.compare{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.compare th,.compare td{padding:14px 18px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.compare th{background:var(--navy);color:#fff;font-family:var(--display);letter-spacing:.06em;font-size:.85rem}
.compare tr:last-child td{border-bottom:0}
.compare td:first-child{color:var(--muted)}
.compare td:last-child{color:var(--navy);font-weight:550}

/* Split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:32px}}

/* Founder */
.founder{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:center}
.founder .portrait{aspect-ratio:4/5;border-radius:var(--radius);background:linear-gradient(160deg,var(--navy),var(--teal));display:grid;place-items:center;color:#fff;font-family:var(--display);font-weight:800;font-size:3.4rem;letter-spacing:.06em}
.creds{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 18px}
.creds span{background:var(--sage);color:var(--green);font-weight:700;font-size:.8rem;padding:5px 11px;border-radius:999px}
@media (max-width:760px){.founder{grid-template-columns:1fr}.founder .portrait{max-width:220px}}

/* Page hero */
.page-hero{padding:72px 0 56px;background:linear-gradient(135deg,var(--navy) 0%,#123659 60%,var(--teal) 140%);color:#fff}
.page-hero h1{color:#fff}
.page-hero .lead{color:#D5E2EC}
.page-hero .eyebrow{color:var(--gold)}
.page-hero.green{background:linear-gradient(135deg,#0F4A43 0%,var(--teal) 70%,var(--green) 130%)}

/* CTA band */
.cta-band{background:var(--navy);color:#fff;border-radius:22px;padding:56px;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.cta-band h2{color:#fff}.cta-band p{color:#C9D6E3}
@media (max-width:820px){.cta-band{grid-template-columns:1fr;padding:36px 26px}}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:650;color:var(--navy);padding:18px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--teal);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);padding-bottom:18px;margin:0}

/* Forms */
.form{display:grid;gap:16px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.form .row2{grid-template-columns:1fr}}
label{font-weight:600;font-size:.92rem;color:var(--navy);display:block;margin-bottom:6px}
input,select,textarea{width:100%;font:inherit;padding:12px 14px;border:1px solid #C5CFDA;border-radius:10px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--teal);outline:3px solid rgba(15,107,115,.18)}
textarea{min-height:140px;resize:vertical}
.hidden{display:none}
.note{font-size:.88rem;color:var(--muted)}
.inline-form{display:flex;gap:10px;flex-wrap:wrap;max-width:520px}
.inline-form input{flex:1 1 220px}

/* Notice */
.notice{border-left:4px solid var(--gold);background:#FBF7EC;padding:16px 20px;border-radius:0 10px 10px 0;color:var(--ink);font-size:.95rem}

/* Footer */
.site-footer{background:#0A1A31;color:#B9C6D6;padding:64px 0 28px;margin-top:0}
.site-footer a{color:#DCE6F0;text-decoration:none}
.site-footer a:hover{color:var(--gold)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-size:.82rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}
.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin-bottom:8px}
.foot-brand{display:flex;gap:10px;align-items:center;margin-bottom:14px}
.foot-brand b{color:#fff;font-family:var(--display);letter-spacing:.08em}
.foot-tag{font-family:var(--display);font-weight:800;color:var(--gold);letter-spacing:.12em;font-size:.85rem}
.legal{border-top:1px solid #1C3354;margin-top:40px;padding-top:20px;font-size:.82rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}

/* Video */
.video-ph{aspect-ratio:16/9;border-radius:var(--radius);background:linear-gradient(135deg,var(--navy),var(--teal));display:grid;place-items:center;color:#fff;text-align:center;padding:20px}
.video-ph svg{width:56px;height:56px;margin:0 auto 10px}

/* Think Function Education palette (blue + green) */
.page-hero.edu{background:linear-gradient(135deg,#123A6B 0%,#1E5A8C 55%,#2F7D5B 120%)}
.page-hero.edu .eyebrow{color:#BFE3CF}

.card .price{font-family:var(--display);font-weight:800;color:var(--teal);font-size:1.05rem;margin:-4px 0 10px}

img.portrait{width:100%;height:auto;object-fit:cover;display:block}

.portrait-mark{display:flex!important;flex-direction:column;justify-content:center;align-items:center;gap:14px;text-align:center}
.portrait-mark small{font-family:var(--body,inherit);font-size:.95rem;font-weight:600;letter-spacing:.02em;line-height:1.4;opacity:.9}