:root {
  color-scheme: dark;
  --cyan: #6bdcff;
  --cyan-strong: #30bfff;
  --ink: #f6f8fb;
  --muted: rgba(234,242,248,.78);
  --deep: #06131f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--deep); }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--deep);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }

.site-header {
  position: fixed;
  z-index: 50;
  top: 0; left: 0; right: 0;
  height: 76px;
  padding: 0 clamp(24px, 3vw, 60px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: linear-gradient(180deg, rgba(1,8,16,.44), rgba(1,8,16,.12) 58%, transparent);
}
.mini-wordmark { font-size: 10px; font-weight: 700; letter-spacing: .34em; white-space: nowrap; }
.nav { display: flex; gap: 42px; align-items: center; }
.nav a { position: relative; font-size: 9px; font-weight: 700; letter-spacing: .22em; color: rgba(244,248,252,.78); }
.nav a:hover, .nav a.active { color: #fff; }
.nav a.active::after { content:""; position:absolute; left:1px; right:1px; bottom:-11px; height:1px; background:var(--cyan); box-shadow:0 0 10px var(--cyan); }
.top-cta {
  justify-self: end;
  padding: 11px 25px;
  border: 1px solid rgba(167,217,255,.72);
  border-radius: 999px;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: .2em;
  background: rgba(4,23,39,.24);
  box-shadow: inset 0 0 18px rgba(55,176,255,.05);
  transition: .25s ease;
}
.top-cta:hover { box-shadow: 0 0 28px rgba(44,175,255,.17), inset 0 0 20px rgba(55,176,255,.09); border-color:#d0eeff; }

.hero {
  position: relative;
  width: 100%;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  place-items: start center;
  padding: clamp(84px, 8.6vh, 108px) 5vw 84px;
  background: #071521;
}
.hero-bg {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  display: block;
  user-select: none;
  pointer-events: none;
  -webkit-user-drag: none;
}
.hero-shade {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(0,7,15,.34) 0%, rgba(0,7,15,.07) 30%, rgba(0,7,14,.04) 60%, rgba(0,7,14,.30) 100%),
    radial-gradient(ellipse at 50% 30%, rgba(1,11,21,.12) 0 23%, transparent 55%);
}
.hero-content {
  position: relative;
  z-index: 10;
  width: min(920px, 86vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.logo-stage {
  position: relative;
  width: min(550px, 49vw);
  height: 208px;
  margin-bottom: 2px;
  isolation: isolate;
  overflow: visible;
}
.logo-image {
  position: absolute;
  z-index: 3;
  inset: 0;
  background-image: url('assets/networkbuilder-logo-source.png');
  background-size: 100% auto;
  background-repeat: no-repeat;
  background-position: center -96px;
  mix-blend-mode: screen;
  filter: brightness(1.08) contrast(1.08) drop-shadow(0 0 7px rgba(67,198,255,.22));
  animation: logoBreathe 12s ease-in-out infinite;
  pointer-events: none;
}
.logo-halo {
  position: absolute;
  z-index: 1;
  pointer-events: none;
  left: 12%; right: 12%; top: 12%; bottom: 9%;
  border-radius: 50%;
  mix-blend-mode: screen;
  background: radial-gradient(ellipse at center, rgba(86,218,255,.20) 0%, rgba(46,150,255,.08) 40%, transparent 72%);
  filter: blur(22px);
  opacity: .18;
  animation: haloBreathe 12s ease-in-out infinite;
}
.halo-core { left: 28%; right: 28%; top: 28%; bottom: 24%; filter: blur(12px); opacity: .14; animation-duration: 15s; animation-delay: -4s; }
.spark {
  position: absolute;
  z-index: 4;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: rgba(245,253,255,.98);
  box-shadow: 0 0 4px rgba(255,255,255,.9), 0 0 10px rgba(73,205,255,.72);
  opacity: 0;
  pointer-events: none;
}
.s1 { left: 24%; top: 27%; animation: sparkle 18s ease-in-out 2.5s infinite; }
.s2 { right: 23%; top: 33%; animation: sparkle 23s ease-in-out 9s infinite; }
.s3 { left: 49.5%; top: 8%; animation: sparkle 27s ease-in-out 15s infinite; }
@keyframes logoBreathe {
  0%,100% { filter: brightness(1.06) contrast(1.08) drop-shadow(0 0 6px rgba(67,198,255,.16)); }
  50% { filter: brightness(1.13) contrast(1.08) drop-shadow(0 0 12px rgba(67,198,255,.30)); }
}
@keyframes haloBreathe {
  0%,100% { opacity:.12; transform:scale(.985); }
  50% { opacity:.24; transform:scale(1.025); }
}
@keyframes sparkle {
  0%, 95%, 100% { opacity:0; transform:scale(.7); }
  96% { opacity:.30; }
  96.6% { opacity:.92; transform:scale(1.35); }
  97.4% { opacity:.10; transform:scale(.85); }
  98.2% { opacity:0; }
}

.hero h1 {
  margin: 0;
  font-size: clamp(24px, 2.15vw, 38px);
  line-height: 1.23;
  font-weight: 400;
  letter-spacing: .31em;
  text-indent: .31em;
  text-shadow: 0 2px 22px rgba(0,0,0,.72);
}
.hero h2 {
  margin: 7px 0 0;
  font-size: clamp(21px, 1.95vw, 34px);
  line-height: 1.28;
  font-weight: 400;
  letter-spacing: .30em;
  text-indent: .30em;
  color: #68d6ff;
  text-shadow: 0 0 23px rgba(20,151,255,.20), 0 2px 20px rgba(0,0,0,.72);
}
.intro {
  width: min(745px, 91%);
  margin: 16px auto 0;
  color: rgba(246,248,251,.94);
  font-size: clamp(13px, 1.03vw, 17px);
  line-height: 1.52;
  letter-spacing: .045em;
  text-shadow: 0 2px 20px rgba(0,0,0,.86);
}
.sectors {
  width: min(900px, 96%);
  margin: 12px auto 0;
  color: rgba(195,229,247,.86);
  font-size: clamp(7px, .58vw, 9px);
  line-height: 1.55;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-shadow: 0 2px 16px rgba(0,0,0,.82);
}
.sectors span {
  display: inline-block;
  margin: 0 .65em;
  color: rgba(94,211,255,.9);
}
.primary-cta {
  width: 278px;
  height: 56px;
  margin-top: 26px;
  padding: 0 23px 0 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid rgba(207,237,255,.88);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(5,25,43,.63), rgba(18,56,84,.57));
  backdrop-filter: blur(8px);
  box-shadow: inset 0 0 24px rgba(67,177,255,.10), 0 0 24px rgba(0,105,255,.08);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .22em;
  transition: transform .25s, box-shadow .25s;
}
.primary-cta:hover { transform: translateY(-2px); box-shadow: inset 0 0 28px rgba(67,177,255,.13), 0 0 34px rgba(31,155,255,.20); }
.arrow { width: 10px; height: 10px; border-top: 1px solid #fff; border-right: 1px solid #fff; transform: rotate(45deg); }
.side-copy {
  position: absolute;
  z-index: 10;
  top: 44%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: .26em;
  line-height: 1;
  color: rgba(190,229,251,.82);
  text-shadow: 0 2px 12px rgba(0,0,0,.8);
}
.side-copy-left { left: 3.1vw; }
.side-copy-right { right: 3.1vw; text-align: right; }
.scroll-cue {
  position: absolute;
  z-index: 10;
  left: 50%; bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  color: rgba(238,248,255,.80);
}
.scroll-line { width: 1px; height: 42px; background: linear-gradient(180deg, transparent, rgba(128,216,255,.92)); }
.scroll-dot { width: 10px; height: 10px; border: 1px solid #d1f2ff; border-radius: 50%; box-shadow: 0 0 11px rgba(50,181,255,.25); }
.scroll-label { margin-top: 3px; font-size: 7.5px; letter-spacing: .34em; }

.content-section {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 110px 24px 90px;
  position: relative;
  background:
    radial-gradient(circle at 50% 0%, rgba(27,112,176,.10), transparent 40%),
    #06131f;
}
.glass-card {
  width: min(930px, 88vw);
  text-align: center;
  padding: clamp(36px, 5vw, 70px);
  border: 1px solid rgba(156,214,255,.24);
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(3,16,28,.90), rgba(6,27,44,.74));
  box-shadow: 0 30px 90px rgba(0,0,0,.31), inset 0 1px rgba(255,255,255,.05);
  backdrop-filter: blur(20px);
}
.eyebrow { color:var(--cyan); font-size:9px; font-weight:800; letter-spacing:.34em; }
.glass-card h3 { margin:15px 0 0; font-size:clamp(30px,4vw,58px); font-weight:300; }
.glass-card p { margin:18px auto 0; max-width:730px; color:var(--muted); font-size:clamp(14px,1.1vw,17px); line-height:1.65; }
.workflow { margin-top:40px; display:grid; grid-template-columns:auto 1fr auto 1fr auto 1fr auto; align-items:center; gap:18px; }
.workflow span { font-size:10px; font-weight:800; letter-spacing:.2em; }
.workflow i { height:1px; background:linear-gradient(90deg, rgba(70,196,255,.16), rgba(70,196,255,.78), rgba(70,196,255,.16)); }
.contact-card { width:min(720px,90vw); }
.signup { margin:29px auto 0; display:grid; grid-template-columns:1fr auto; gap:8px; max-width:600px; padding:7px; border:1px solid rgba(150,211,255,.31); border-radius:999px; background:rgba(0,9,17,.34); }
.signup input { min-width:0; height:48px; padding:0 19px; border:0; outline:0; background:transparent; color:#fff; }
.signup input::placeholder { color:rgba(228,241,249,.55); }
.signup button { min-height:48px; padding:0 24px; border:1px solid rgba(174,226,255,.65); border-radius:999px; color:#fff; background:linear-gradient(90deg, rgba(0,104,239,.84), rgba(48,197,244,.76)); font-size:9px; font-weight:800; letter-spacing:.18em; cursor:pointer; }
.form-note { min-height:1.3em; color:#79dcff !important; font-size:12px !important; }
.reveal { opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity:1; transform:none; }
.site-footer { position: fixed; z-index: 30; bottom: 14px; left: 0; right: 0; padding: 0 3.1vw; display: flex; justify-content: space-between; pointer-events: none; font-size: 7.5px; letter-spacing: .32em; color: rgba(235,245,252,.56); }

@media (max-width: 820px) {
  .site-header { height: 68px; padding: 0 18px; grid-template-columns: 1fr auto; }
  .mini-wordmark { font-size: 8.5px; letter-spacing: .25em; }
  .nav { display: none; }
  .top-cta { padding: 9px 14px; font-size: 7.5px; letter-spacing: .15em; }
  .hero { padding: 82px 18px 76px; align-items:start; }
  .hero-bg { object-position: 38% 50%; }
  .hero-content { width:100%; }
  .logo-stage { width:min(94vw, 540px); height:196px; margin-top:2vh; }
  .logo-image { background-position:center -91px; }
  .hero h1 { font-size:clamp(21px,6.2vw,31px); letter-spacing:.17em; text-indent:.17em; }
  .hero h2 { font-size:clamp(17px,5vw,27px); letter-spacing:.13em; text-indent:.13em; margin-top:10px; }
  .intro { width:min(560px,94%); font-size:13px; margin-top:17px; }
  .primary-cta { width:min(280px,80vw); margin-top:24px; }
  .side-copy { display:none; }
  .scroll-cue { bottom:14px; }
  .site-footer { display:none; }
  .glass-card { width:100%; padding:34px 20px; border-radius:22px; }
  .workflow { grid-template-columns:repeat(2,1fr); gap:18px; }
  .workflow i { display:none; }
  .signup { grid-template-columns:1fr; border-radius:21px; }
  .signup input { text-align:center; }
}
@media (max-width: 560px) {
  .hero-bg { object-position: 34% 50%; }
  .logo-stage { height:170px; margin-top:3vh; }
  .logo-image { background-position:center -80px; }
  .logo-halo { filter:blur(16px); }
  .hero h1 { font-size:20px; }
  .hero h2 { font-size:17px; line-height:1.42; }
  .intro { font-size:12.5px; line-height:1.55; }
  .primary-cta { height:52px; font-size:9px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; }
}

@media (max-width: 760px) {
  .sectors {
    width: min(520px, 94%);
    margin-top: 10px;
    font-size: 7px;
    line-height: 1.7;
    letter-spacing: .12em;
  }
  .sectors span { margin: 0 .35em; }
}