:root{
  --teal:#00B5BD;
  --teal-deep:#00838a;
  --lemon:#FFF000;
  --ink:#1A1A1A;
  --white:#fff;
  --line:#e6e6e6;
  --muted:#595959;
  --max:1100px;
  --reading:clamp(620px,64vw,760px);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Open Sans",ui-sans-serif,system-ui,Arial,sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.7;
  font-size:18px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
  overflow-x:hidden;
}

h1,h2,h3,.wordmark,.signup h2{
  font-family:"Montserrat",ui-sans-serif,system-ui,Arial,sans-serif;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-.4px;
}

img{display:block;max-width:100%;height:auto}
a{color:var(--teal-deep)}
.container{width:min(100% - 40px,var(--max));margin:0 auto}
.reading{width:min(92%,var(--reading));margin:0 auto}
.skip-link{position:absolute;left:0;top:0;transform:translateY(-120%);background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:100;text-decoration:none}
.skip-link:focus{transform:translateY(0)}

.balloons{position:absolute;inset:0;overflow:hidden;z-index:0;pointer-events:none}
.balloons img{position:absolute;height:auto}
.balloon-logo-main{width:clamp(188px,18vw,323px);top:-4vw;right:-3vw;opacity:.13}
.balloon-logo-doc{width:clamp(170px,16vw,300px);top:-4vw;right:-3vw;opacity:.10}
.balloon-news-left{width:clamp(108px,11.7vw,203px);top:20vh;left:-2vw;opacity:.13}
.balloon-news-about{width:clamp(108px,11.7vw,203px);top:22%;left:-2vw;opacity:.12}
.balloon-news-contact{width:clamp(100px,11vw,190px);top:34%;left:-2vw;opacity:.10}
.balloon-logo-small{width:clamp(80px,8vw,150px);top:50vh;right:13%;opacity:.12}
.balloon-logo-about{width:clamp(80px,8vw,150px);top:58%;right:7%;opacity:.11}

header,main,footer{position:relative;z-index:1}
.site-header{padding:22px 0}
.header-inner{display:flex;align-items:center;justify-content:flex-start;gap:14px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink)}
.brand img{height:clamp(46px,6vw,58px);width:auto}

.button{
  display:inline-block;
  font:inherit;
  font-weight:700;
  font-size:18px;
  color:var(--white);
  background:var(--teal);
  border:none;
  border-radius:12px;
  padding:15px 26px;
  text-decoration:none;
  cursor:pointer;
  transition:background .15s;
}
.button:hover{background:var(--teal-deep)}
.button:disabled{cursor:not-allowed;opacity:.68}
.hl{background:var(--lemon);padding:0 .12em;box-decoration-break:clone;-webkit-box-decoration-break:clone}

.hero{padding:clamp(22px,4vw,60px) 0 clamp(56px,8vw,104px);text-align:center}
.hero-inner{width:min(92%,clamp(620px,64vw,820px));margin:0 auto}
.hero h1{font-size:clamp(40px,5.4vw,66px);line-height:1.06;margin:0;letter-spacing:-.5px}
.hero-sub{font-size:clamp(19px,2.4vw,26px);line-height:1.4;margin:18px auto 0;max-width:34ch;color:var(--ink)}
.news-accent{width:clamp(104px,14vw,132px);margin:clamp(20px,3vw,32px) auto 2px}

.signup{
  margin:16px auto 0;
  width:min(100%,clamp(440px,48vw,560px));
  background:var(--white);
  border:1px solid var(--line);
  border-radius:14px;
  padding:28px 26px;
  box-shadow:0 24px 60px rgba(0,0,0,.12);
  text-align:left;
}
.signup h2{font-size:22px;margin:0 0 4px}
.signup p.lead-in{margin:0 0 18px;font-size:17px;color:var(--muted)}
.field-label{display:block;font-weight:600;font-size:16px;margin-bottom:8px}
.email-input{width:100%;font:inherit;font-size:18px;padding:15px 16px;border:2px solid var(--line);border-radius:12px;background:#fafafa}
.email-input:focus{outline:none;border-color:var(--teal);background:var(--white)}
.signup .button{width:100%;margin-top:14px;font-size:19px;padding:16px 20px}
.birdsend-message{margin:12px 0 0;font-size:14px;font-weight:700;color:var(--teal-deep);text-align:center}
.consent{display:flex;gap:10px;align-items:flex-start;margin-top:16px;font-size:14px;color:var(--muted);line-height:1.5}
.consent input{margin-top:4px;width:18px;height:18px;flex:0 0 auto}
.about-link{margin:18px 0 0;font-size:16px;text-align:center}

.doc{width:min(92%,var(--reading));margin:0 auto;padding:clamp(16px,3vw,32px) 0 clamp(48px,7vw,80px)}
.doc h1{font-size:clamp(32px,5vw,48px);line-height:1.12;margin:0 0 6px}
.doc .updated{color:var(--muted);font-size:15px;margin:0 0 28px}
.doc h2{font-size:clamp(22px,3vw,28px);margin:36px 0 12px}
.doc h3{font-size:clamp(18px,2.2vw,21px);margin:24px 0 8px;color:var(--teal-deep)}
.doc p{margin:0 0 16px}
.doc ul{margin:0 0 16px;padding-left:22px}
.doc li{margin:0 0 8px}
.doc a{word-break:break-word}
.doc table{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:15px}
.doc th,.doc td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.doc th{background:#f5fbfb;font-family:"Montserrat",sans-serif;font-weight:700}
.doc .price-cell{text-align:right}
.doc .lead{font-size:clamp(19px,2.4vw,23px);color:var(--muted);margin:0 0 22px}
.cta-wrap{margin:30px 0 0;text-align:left}

.page-hero{padding:clamp(20px,3vw,40px) 0 clamp(20px,3vw,36px);text-align:left}
.page-hero h1{font-size:clamp(34px,5vw,56px);line-height:1.1;margin:0;letter-spacing:-.5px}
.tagline{margin:16px 0 0;font-family:"Montserrat",sans-serif;font-weight:800;font-size:clamp(22px,3vw,30px)}
.content{padding:8px 0 56px}
.intro p{margin:0 0 18px}
.intro .em{font-style:italic}
.intro .topics{font-weight:600}
.intro .sign-off{font-weight:700}
.content h2{font-size:clamp(26px,3.4vw,36px);margin:40px 0 18px;text-align:left}
.about-portrait{width:min(180px,52vw);aspect-ratio:1;margin:26px 0 10px;padding:5px;border-radius:50%;background:linear-gradient(135deg,#eafbfc,#cfeff1);border:1px solid rgba(0,181,189,.35);box-shadow:0 14px 34px rgba(0,131,138,.12)}
.about-portrait img{width:100%;height:100%;display:block;object-fit:cover;border-radius:50%}
.faq-list{display:grid;gap:12px;margin-top:8px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--white);overflow:hidden}
.faq-question{width:100%;display:flex;justify-content:space-between;gap:18px;padding:18px 20px;border:0;background:transparent;color:var(--ink);text-align:left;font-family:"Montserrat",sans-serif;font-weight:800;font-size:clamp(17px,2vw,20px);cursor:pointer}
.faq-question .plus{color:var(--teal-deep);font-size:24px;line-height:1;flex:0 0 auto;transition:transform .15s}
.faq-answer{display:none;padding:0 20px 20px;color:var(--ink)}
.faq-answer .em{font-style:italic;color:var(--muted)}
.faq-item.open .faq-answer{display:block}
.faq-item.open .faq-question .plus{transform:rotate(45deg)}
.for-list{margin:14px 0 0;padding-left:22px}
.for-list li{margin:0 0 12px}
.closing{text-align:left;font-style:italic;color:var(--muted);margin:40px 0 0}
.science-references{padding:0 0 44px}
.science-references h2{font-size:clamp(22px,3vw,30px);margin:0 0 14px}
.science-references ol{margin:0;padding-left:20px;color:var(--muted);font-size:.82rem;line-height:1.45}
.science-references li{margin:0 0 12px}
.science-references a{word-break:break-word}
.science-references span{display:block;margin-top:3px;font-weight:700;color:var(--teal-deep)}

.contact-page{width:min(92%,var(--reading));margin:0 auto;padding:clamp(16px,3vw,32px) 0 clamp(48px,7vw,80px)}
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:clamp(24px,5vw,42px);box-shadow:0 24px 60px rgba(0,0,0,.10)}
.eyebrow{margin:0 0 8px;color:var(--teal-deep);font-family:"Montserrat",sans-serif;font-size:14px;font-weight:800;text-transform:uppercase;letter-spacing:.04em}
.contact-card h1{font-size:clamp(32px,5vw,48px);line-height:1.12;margin:0 0 14px}
.contact-card .lead{font-size:clamp(19px,2.4vw,23px);color:var(--muted);margin:0 0 26px}
.contact-card .direct-email{margin:24px 0 0;color:var(--muted);font-size:16px}
.contact-form{display:grid;gap:18px;margin-top:26px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.contact-form label{display:grid;gap:7px;font-size:16px;font-weight:700}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;font:inherit;font-size:17px;color:var(--ink);background:#fafafa;border:2px solid var(--line);border-radius:12px;padding:13px 14px}
.contact-form textarea{resize:vertical;min-height:150px}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--teal);background:var(--white)}
.form-check{display:flex !important;grid-template-columns:none;flex-direction:row;align-items:flex-start;gap:10px;color:var(--muted);font-size:15px;font-weight:600;line-height:1.5}
.form-check input{width:18px;height:18px;margin-top:4px;flex:0 0 auto}
.form-honeypot{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}
.turnstile-wrap{min-height:65px}
.form-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.form-note{margin:0;color:var(--muted);font-size:15px;line-height:1.45}
.form-status{margin:0;min-height:1.5em;font-size:16px;font-weight:700}
.form-status.success{color:#176f38}
.form-status.error{color:#9f1d1d}

.site-footer{position:relative;padding:56px 0;background:var(--white);border-top:1px solid var(--line);font-size:15px;color:var(--muted)}
.footer-inner{display:grid;grid-template-columns:minmax(260px,1fr) auto;gap:48px;align-items:start}
.footer-brand{display:grid;gap:14px;max-width:360px}
.footer-logo{width:fit-content;display:block}
.footer-logo img{width:240px;height:auto}
.footer-brand p{margin:0;color:var(--muted)}
.footer-small{margin:0;font-size:.82rem;line-height:1.45;color:var(--muted)}
.footer-address{margin:0;font-style:normal}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--teal-deep)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(140px,1fr));gap:42px;font-size:14px}
.footer-links div{display:grid;gap:10px}
.footer-links strong{color:var(--ink);font-family:"Montserrat",sans-serif;font-size:15px}
.footer-links a{display:block;text-decoration:none}

@media (max-height:900px){
  .hero{padding:clamp(12px,2vw,26px) 0 44px}
  .hero h1{font-size:clamp(36px,4.4vw,52px)}
  .hero-sub{font-size:clamp(18px,2vw,21px);margin-top:13px}
  .news-accent{width:clamp(82px,10vw,104px);margin:14px auto 2px}
  .signup{margin-top:14px}
}

@media(max-width:680px){
  .footer-inner{grid-template-columns:1fr;gap:34px}
  .form-grid{grid-template-columns:1fr}
}

@media(max-width:540px){
  body{font-size:17px}
  .brand img{height:42px}
  .balloon-logo-main{opacity:.08}
  .hero{padding-top:38px}
  .hero h1{line-height:1.16}
  .signup{padding:22px 18px}
  .contact-card{padding:22px 18px}
  .form-actions{align-items:stretch}
  .contact-form .button{width:100%}
}