:root {
  --navy: #001f3f;
  --sky: #7FDBFF;
  --teal: #39CCCC;
  --teal-dark: #2bb5b5;
  --white: #ffffff;
  --light-bg: #f4fbfd;
  --wave-fill: #ffffff;
  --text: #1a2740;
  --text-muted: #5a6b80;
  --shadow-sm: 0 2px 8px rgba(0, 31, 63, 0.08);
  --shadow-md: 0 8px 24px rgba(0, 31, 63, 0.12);
  --shadow-lg: 0 20px 50px rgba(0, 31, 63, 0.18);
  --radius: 14px;
  --radius-lg: 22px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 84px;
  --header-h-shrunk: 64px;
  --maxw: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Nunito', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
  padding-top: var(--header-h);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Raleway', 'Segoe UI', sans-serif;
  font-weight: 600;
  line-height: 1.25;
  color: var(--navy);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
h4 { font-size: 1.2rem; }

p { margin-bottom: 1rem; }

a {
  color: var(--teal-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--navy); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}
figure { margin: 0; }

ul, ol { margin: 0 0 1rem 1.2rem; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============ HEADER / NAV ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  height: var(--header-h);
  box-shadow: 0 1px 0 rgba(0, 31, 63, 0.06);
  transition: height var(--transition), box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled {
  height: var(--header-h-shrunk);
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.logo {
  font-family: 'Raleway', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.02em;
  transition: font-size var(--transition);
}
.site-header.scrolled .logo { font-size: 1.3rem; }
.logo .logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy), var(--teal));
  color: var(--white);
  font-size: 1.1rem;
  transition: width var(--transition), height var(--transition);
}
.site-header.scrolled .logo .logo-mark { width: 32px; height: 32px; }
.logo .logo-accent { color: var(--teal); }
.logo:hover { color: var(--navy); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--navy);
  border-radius: 3px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-block;
  padding: 0.55rem 1rem;
  font-family: 'Raleway', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--navy);
  border-radius: 8px;
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--teal);
  border-radius: 2px;
  transition: width var(--transition), left var(--transition);
}
.nav-links a:hover { color: var(--teal-dark); }
.nav-links a:hover::after { width: 60%; left: 20%; }
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--teal-dark);
}
.nav-links a.active::after,
.nav-links a[aria-current="page"]::after {
  width: 60%;
  left: 20%;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy) 0%, #003a6b 45%, var(--sky) 100%);
  overflow: hidden;
  padding: 4rem 0 6rem;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(127, 219, 255, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(57, 204, 204, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-content { color: var(--white); }
.hero-content h1 {
  color: var(--white);
  margin-bottom: 1.2rem;
}
.hero-content h1 .highlight {
  color: var(--sky);
  display: block;
}
.hero-content p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  max-width: 480px;
}
.hero-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  margin-left: auto;
  max-width: 460px;
  transform: translateY(0);
  transition: transform var(--transition), box-shadow var(--transition);
}
.hero-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 60px rgba(0, 31, 63, 0.25);
}
.hero-card h2 {
  margin-bottom: 0.6rem;
}
.hero-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}
.hero-card .btn { width: 100%; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: 'Raleway', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 1.9rem;
  border: 2px solid var(--teal);
  border-radius: 50px;
  background: transparent;
  color: var(--teal-dark);
  cursor: pointer;
  text-align: center;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
  position: relative;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  z-index: -1;
}
.btn:hover {
  color: var(--white);
  transform: scale(1.04) translateY(-2px);
  box-shadow: 0 10px 24px rgba(57, 204, 204, 0.35);
}
.btn:hover::before { transform: scaleX(1); }
.btn:active { transform: scale(1); }

.btn-navy {
  border-color: var(--navy);
  color: var(--navy);
}
.btn-navy::before { background: var(--navy); }
.btn-navy:hover { color: var(--white); box-shadow: 0 10px 24px rgba(0, 31, 63, 0.3); }

.btn-white {
  border-color: var(--white);
  color: var(--white);
}
.btn-white::before { background: var(--white); }
.btn-white:hover { color: var(--navy); }

.btn-solid {
  background: var(--teal);
  color: var(--white);
}
.btn-solid::before { background: var(--navy); }
.btn-solid:hover { color: var(--white); border-color: var(--navy); }

/* ============ SECTIONS ============ */
.section {
  padding: 5rem 0;
  position: relative;
}
.section-alt { background: var(--light-bg); }
.section-navy {
  background: linear-gradient(160deg, var(--navy) 0%, #00335f 100%);
  color: var(--white);
}
.section-navy h2, .section-navy h3 { color: var(--white); }
.section-navy p { color: rgba(255, 255, 255, 0.88); }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}
.section-head h2 { margin-bottom: 0.75rem; }
.section-head p { color: var(--text-muted); font-size: 1.08rem; }
.section-navy .section-head p { color: rgba(255, 255, 255, 0.85); }
.section-head .eyebrow {
  display: inline-block;
  font-family: 'Raleway', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal-dark);
  margin-bottom: 0.8rem;
}

/* ============ DIVIDERS (wave + line-dot) ============ */
.wave-divider {
  position: relative;
  width: 100%;
  line-height: 0;
  pointer-events: none;
}
.wave-divider svg {
  display: block;
  width: 100%;
  height: 80px;
}
.wave-divider.flip svg { transform: rotate(180deg); }
.section-alt + .wave-divider svg path,
.section + .wave-divider svg path { fill: var(--light-bg); }
.section-navy + .wave-divider svg path { fill: var(--navy); }

.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 0 auto;
  padding: 2.5rem 0;
  max-width: var(--maxw);
}
.divider .line {
  flex: 1;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
}
.divider .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 5px rgba(57, 204, 204, 0.18);
}
.divider .icon {
  font-size: 1.3rem;
  color: var(--teal);
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--teal);
  border-radius: 50%;
  background: var(--white);
}

/* ============ CARDS GRID ============ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(0, 31, 63, 0.05);
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.card-body { padding: 1.8rem; }
.card-body h3 { margin-bottom: 0.6rem; }
.card-body p { color: var(--text-muted); margin-bottom: 1.2rem