:root {
  --primary: #0077B6;
  --primary-dark: #023E8A;
  --secondary: #90E0EF;
  --text: #333333;
  --text-light: #666666;
  --bg: #FAFAFA;
  --white: #FFFFFF;
  --success: #2A9D8F;
  --warning: #E9C46A;
  --danger: #E76F51;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-bottom: 60px; /* Space for mobile sticky CTA */
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 4rem 0;
}

/* Header & Nav */
header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-weight: 600;
  color: var(--text);
}

.nav-links a:hover {
  color: var(--primary);
}

/* Hero Section */
.hero {
  position: relative;
  background-size: cover;
  background-position: center;
  color: var(--white);
  text-align: center;
  padding: 6rem 1rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 30, 50, 0.8);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--white);
  font-size: 3rem;
}

/* Iframe Section */
.iframe-container {
  background: var(--bg);
  padding: 2rem 0;
  display: flex;
  justify-content: center;
}

/* Cards & Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

/* Simulator */
.simulator-box {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.simulator-box input {
  width: 100%;
  padding: 1rem;
  font-size: 1.2rem;
  border: 2px solid var(--secondary);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 1rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  text-transform: uppercase;
}
.btn:hover { background: var(--primary-dark); color: var(--white); }
.btn-secondary { background: var(--secondary); color: var(--primary-dark); }
.btn-secondary:hover { background: var(--primary); color: var(--white); }

/* Silo & Reviews */
.silo-links {
  background: var(--primary-dark);
  color: var(--white);
  padding: 3rem 0;
  text-align: center;
}

.silo-links h3 {
  color: var(--secondary);
}

.silo-grid {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.silo-grid a {
  background: rgba(255,255,255,0.1);
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  color: var(--white);
  border: 1px solid var(--secondary);
}

.silo-grid a:hover {
  background: var(--secondary);
  color: var(--primary-dark);
}

.reviews .card {
  border-left: 4px solid var(--success);
}

/* Exit Popup */
.exit-popup {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.exit-popup.active { display: flex; }

.exit-popup-content {
  background: var(--white);
  padding: 3rem;
  border-radius: var(--radius);
  max-width: 500px;
  text-align: center;
  position: relative;
}

.close-popup {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-light);
}

/* Sticky Mobile CTA */
.sticky-mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--primary);
  padding: 1rem;
  text-align: center;
  z-index: 999;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
}

.sticky-mobile-cta a {
  color: var(--white);
  font-weight: 800;
  font-size: 1.2rem;
  text-transform: uppercase;
  display: block;
}

/* Footer */
footer {
  background: var(--text);
  color: var(--white);
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .sticky-mobile-cta { display: block; }
  .hero h1 { font-size: 2rem; }
  body { padding-bottom: 70px; }
}