:root {
  --nav-height: 72px;
  --blue-1: #0A6CFF;
  --blue-2: #3FA2FF;
  --blue-3: #BFE3FF;
  --bg: #F7F9FC;
  --text-main: #0B1220;
  --text-muted: #5B6472;
  --border: #E6EBF2;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
}

body {
  background: var(--bg);
  color: var(--text-main);
  overflow-x: hidden;
}

section {
  padding: 96px 8%;
}


/* ---------- HERO ---------- */

.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 80px;
  margin: 50px 0px 10px 0px;
}


.hero-text h1 {
  font-size: 56px;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeUp 1s ease forwards;
}

.hero-text p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 480px;
  animation: fadeUp 1.3s ease forwards;
}

.logo-container {
  width: 360px;
  height: 360px;
  animation: float 6s ease-in-out infinite;
  margin-top: 40px;
  padding: 0;
}

.logo-container img {
  width: 100%;
}

/* ---------- ARCHITECTURE ---------- */

.architecture {
  text-align: center;
}

.architecture h2 {
  font-size: 40px;
  margin-bottom: 16px;
}

.architecture p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 80px;
}

.system {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 80px;
}

.node {
  padding: 28px 36px;
  border-radius: 20px;
  background: white;
  box-shadow: 0 10px 40px rgba(0,0,0,0.05);
  animation: pulse 4s ease-in-out infinite;
}

.node.cbu {
  background: linear-gradient(180deg, var(--blue-1), var(--blue-2));
  color: white;
  transform: scale(1.1);
}

.pins {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---------- CLAIMS ---------- */

.claims {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.claim {
  background: white;
  padding: 36px;
  border-radius: 24px;
  border: 1px solid var(--border);
  transition: transform 0.4s ease;
}

.claim:hover {
  transform: translateY(-8px);
}

.claim h3 {
  margin-bottom: 12px;
}

.claim p {
  color: var(--text-muted);
  font-size: 15px;
}

/* ---------- FOOTER ---------- */

footer {
  padding: 80px 8%;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ---------- ANI*
/* ---------- SPLIT SECTIONS ---------- */

.split {
  display: flex;
  align-items: center;
  gap: 80px;
}

.split.reverse {
  flex-direction: row-reverse;
}

.split-text {
  flex: 1;
}

.split-text h2 {
  font-size: 40px;
  margin-bottom: 16px;
}

.split-text p {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 460px;
}

.split-media {
  flex: 1;
}

/* ---------- IMAGE PLACEHOLDERS ---------- */

.image-placeholder {
  height: 320px;
  border-radius: 24px;
  background: linear-gradient(
    180deg,
    var(--blue-3),
    #ffffff
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
}

.image-placeholder.wide {
  height: 420px;
  margin-top: 40px;
}

/* ---------- LAYERS ---------- */

.layers {
  text-align: center;
}

.layers h2 {
  font-size: 40px;
}

.layers p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 16px auto 80px;
}

.layer-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.layer {
  width: 320px;
  padding: 16px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.05);
  animation: fadeUp 1s ease forwards;
}

.layer.core {
  background: linear-gradient(180deg, var(--blue-1), var(--blue-2));
  color: white;
}

/* ---------- STATEMENT ---------- */

.statement {
  padding: 160px 8%;
  text-align: center;
}

.statement h1 {
  font-size: 56px;
  line-height: 1.1;
}

/* ---------- FUTURE ---------- */

.future {
  text-align: center;
}

.future h2 {
  font-size: 40px;
}

.future p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 16px auto;
}

/* ---------- RESPONSIVE EXTENSIONS ---------- */

@media (max-width: 900px) {
  .split,
  .split.reverse {
    flex-direction: column;
    text-align: center;
  }

  .layer {
    width: 100%;
  }

  .statement h1 {
    font-size: 40px;
  }
}

/* ---------- NAVBAR ---------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;

  height: var(--nav-height);
  z-index: 1000;

  background: rgba(247, 249, 252, 0.75);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);

  display: flex;
  align-items: center;

  overflow: hidden; /* 🔑 CRITICAL */
}


.nav-spacer {
  height: var(--nav-height);
}



/* Shrink + blur on scroll */
body:not(:has(.hero:hover)) .navbar {
  backdrop-filter: blur(12px);
  background: rgba(247, 249, 252, 0.7);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  height: 100%;

  margin: 0 auto;
  padding: 0 24px;

  display: flex;
  align-items: center;
  justify-content: space-between;
}



/* Logo */

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  white-space: nowrap;
}


.nav-logo img {
  width: 32px;
}

/* Links */

.nav-logo img {
  width: 28px;
  height: 28px;
  display: block;
}


.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 14px;
  position: relative;
  opacity: 0.8;
  transition: opacity 0.3s ease;
  
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
}


.nav-links a:hover {
  opacity: 1;
}

/* Subtle underline animation */

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--blue-1);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* ---------- MOBILE ---------- */

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
}