:root {
  --velocity-navy: #0F1C2E;
  --steel-blue: #2A4D69;
  --ion-teal: #2ED3C6;
  --graphite: #1E1E1E;
  --off-white: #F5F7FA;
  --cool-gray: #CBD5E1;
}

/* GLOBAL */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--graphite);
  background: var(--off-white);
  margin: 0;
}

/* NAVBAR */
.navbar {
  height: 64px;
  display: flex;
  align-items: center;
  transition: background-color 0.25s ease, border-color 0.25s ease;
  z-index: 10;
}

.navbar.at-top {
  background: linear-gradient(
    180deg,
    var(--velocity-navy) 0%,
    var(--steel-blue) 100%
  );
  border-bottom: none;
}

.navbar.at-top .navbar-brand {
  color: white;
}

.navbar.scrolled {
  background: white;
  border-bottom: 1px solid var(--cool-gray);
}

.navbar.scrolled .navbar-brand {
  color: var(--graphite);
}

.navbar-brand {
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* HERO */
.hero {
  position: relative;
  min-height: 80vh;              /* makes hero bigger */
  display: flex;
  align-items: center;           /* vertical centering */
  color: white;

  background: linear-gradient(
    180deg,
    var(--velocity-navy) 0%,
    var(--steel-blue) 85%
  );

  overflow: hidden;
}

/* Hard stop into white */
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 140px;
  background: var(--off-white);
}

/* Content block */
.hero-content {
  max-width: 760px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.hero-sub {
  margin-bottom: 32px;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.15rem;
}


/* CTA */
.btn-primary {
  background: var(--graphite);
  border: none;
  padding: 12px 28px;
}

.btn-primary:hover {
  background: #000;
}

/* SECTIONS */
.section {
  position: relative;
  padding: 80px 0;
  background: var(--off-white);
}

.section-title {
  text-align: center;
  font-weight: 600;
  margin-bottom: 50px;
}

/* SERVICES */
.service-card {
  background: white;
  border: 1px solid var(--cool-gray);
  padding: 30px;
}

/* WHY */
.section.bg-light {
  background: white;
}

.why-title {
  font-weight: 600;
  margin-bottom: 18px;
}

.why-list {
  padding-left: 18px;
}

.why-list li {
  margin-bottom: 12px;
  font-size: 1.05rem;
}

/* FORM */
form .form-control {
  padding: 12px;
  border: 1px solid var(--cool-gray);
}

/* FOOTER */
footer {
  padding: 30px 0;
  border-top: 1px solid var(--cool-gray);
  background: white;
  font-size: 0.9rem;
}

/* MOBILE */
@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
    padding-top: 120px;
    padding-bottom: 80px;
  }

  .hero h1 {
    font-size: 2.3rem;
  }
}