:root{
  --bg: #0b0c10;
  --panel: #0f1118;
  --panel-2: #0c0e14;
  --text: #e9ecf2;
  --muted: #b6bccb;
  --soft: #8f97ab;
  --border: rgba(255,255,255,0.10);
  --border-2: rgba(255,255,255,0.14);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --radius: 18px;
  --radius-sm: 14px;
  --max: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 20% 0%, rgba(255,255,255,0.06), transparent 60%),
              radial-gradient(900px 600px at 85% 10%, rgba(255,255,255,0.05), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }
strong{ font-weight: 650; }

.container{
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 12px;
  background: #fff;
  color: #000;
  border-radius: 10px;
  z-index: 9999;
}
.skip-link:focus{ left: 12px; }

.site-header{
  position: sticky;
  top: 0;
  z-index: 2000;
  background: rgba(11,12,16,0.68);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: grid;
  grid-template-columns: 1.2fr 2fr auto auto;
  gap: 18px;
  align-items: center;
  padding: 14px 0;
}

.brand{
  display:flex;
  flex-direction: column;
  gap: 2px;
}
.brand-link{
  font-weight: 750;
  letter-spacing: 0.2px;
  font-size: 18px;
}
.brand-tag{
  color: var(--soft);
  font-size: 12.5px;
}

.site-nav{
  display:flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}
.site-nav a{
  color: var(--muted);
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 10px;
}
.site-nav a:hover{
  background: rgba(255,255,255,0.06);
  text-decoration: none;
  color: var(--text);
}

.header-cta{ display:flex; justify-content: flex-end; }

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-weight: 620;
  font-size: 13.5px;
  box-shadow: none;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}
.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,0.08);
  border-color: var(--border-2);
  text-decoration: none;
}
.btn-primary{
  background: rgba(255,255,255,0.10);
}
.btn-secondary{
  background: rgba(255,255,255,0.04);
}

.nav-toggle{
  display:none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
}
.nav-toggle span{
  display:block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: rgba(255,255,255,0.75);
  border-radius: 3px;
}

.mobile-nav{
  display:none;
  border-top: 1px solid var(--border);
  background: rgba(11,12,16,0.92);
}
.mobile-nav-inner{
  padding: 14px 0 18px;
  display:flex;
  flex-direction: column;
  gap: 10px;
}
.mobile-nav a{
  color: var(--muted);
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
}
.mobile-nav a:hover{
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.08);
  color: var(--text);
  text-decoration: none;
}
body.nav-open .mobile-nav{ display:block; }

.hero{
  padding: 64px 0 34px;
}
.hero-inner{
  padding: 26px 22px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.hero h1{
  margin: 0 0 14px;
  font-size: clamp(28px, 3.3vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.6px;
}
.lede{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16.5px;
  max-width: 900px;
}
.value-bullets{
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.value-bullets li{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  font-size: 13.5px;
}
.value-bullets strong{ color: var(--text); }

.cta-row{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 6px 0 10px;
}

.microcopy{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13.5px;
}
.muted{ color: var(--soft); }

.hero-disclaimer{
  margin: 14px 0 0;
  color: var(--soft);
  font-size: 12.5px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.section{
  padding: 54px 0;
}
.section.alt{
  background: rgba(255,255,255,0.02);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.section h2{
  margin: 0 0 12px;
  font-size: clamp(22px, 2.1vw, 30px);
  letter-spacing: -0.2px;
}
.section h3{
  margin: 20px 0 10px;
  font-size: 18px;
}
.section h4{
  margin: 0 0 8px;
  font-size: 15.5px;
}
.section p{
  margin: 0 0 12px;
  color: var(--muted);
  max-width: 920px;
}

.list{
  margin: 10px 0 16px 18px;
  color: var(--muted);
}
.list li{ margin: 6px 0; }
.sublist{ margin: 8px 0 0 18px; color: var(--soft); }
.list.compact{ margin-left: 18px; }
.list.compact li{ margin: 5px 0; }

.code-block{
  margin: 16px 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.35);
  overflow: hidden;
}
pre{
  margin: 0;
  padding: 16px 16px;
  overflow-x: auto;
}
code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  color: rgba(255,255,255,0.88);
}

.callout{
  margin: 16px 0;
  padding: 14px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}
.callout p{ margin: 0 0 10px; }
.callout p:last-child{ margin-bottom: 0; }

.grid{
  margin-top: 14px;
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.card{
  padding: 16px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.card p{ margin-bottom: 10px; }

.flow{
  margin: 16px 0 14px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.flow-step{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.flow-step h3{ margin: 0 0 2px; font-size: 16px; }
.flow-arrow{
  text-align: center;
  color: rgba(255,255,255,0.55);
  padding: 10px 0;
  font-size: 18px;
}

.principles{
  margin-top: 14px;
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.principle{
  padding: 16px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.principle h3{ margin: 0 0 8px; font-size: 16px; }
.principle p{ margin: 0; }

.contact-line{
  margin-top: 12px;
  color: var(--muted);
}

.faq{
  margin-top: 10px;
  display: grid;
  gap: 10px;
}
details{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  padding: 12px 14px;
}
summary{
  cursor: pointer;
  list-style: none;
  font-weight: 650;
  color: var(--text);
}
summary::-webkit-details-marker{ display:none; }
.faq-body{
  padding-top: 10px;
}
.faq-body p{ margin: 0 0 10px; color: var(--muted); }
.faq-body p:last-child{ margin-bottom: 0; }

.site-footer{
  padding: 26px 0 34px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.25);
}
.footer-inner{
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: start;
}
.footer-brand{
  font-weight: 750;
  margin-bottom: 4px;
}
.footer-tag{
  color: var(--soft);
  font-size: 12.5px;
}
.footer-links{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a{
  color: var(--muted);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 10px;
}
.footer-links a:hover{
  background: rgba(255,255,255,0.06);
  text-decoration: none;
  color: var(--text);
}
.footer-contact{
  color: var(--soft);
  font-size: 12.5px;
  text-align: right;
}

@media (max-width: 980px){
  .header-inner{
    grid-template-columns: 1fr auto auto;
  }
  .site-nav{ display:none; }
  .nav-toggle{ display:block; }
  .value-bullets{ grid-template-columns: 1fr; }
  .grid{ grid-template-columns: 1fr; }
  .principles{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; }
  .footer-contact{ text-align: left; }
  .footer-links{ justify-content: flex-start; }
}

@media (max-width: 520px){
  .hero{ padding-top: 42px; }
  .hero-inner{ padding: 18px 16px; }
  .btn{ width: 100%; }
  .header-cta{ display:none; }
}


/* IO card under Section 2 */
.io-card{
  margin: 14px 0 18px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.io-col{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.io-col h3{
  margin: 0 0 8px;
  font-size: 15px;
}
.io-col ul{
  margin: 0 0 0 18px;
  color: var(--muted);
}
.io-col li{
  margin: 6px 0;
  font-size: 13.5px;
}
@media (max-width: 980px){
  .io-card{ grid-template-columns: 1fr; }
}