:root {
  --navy: #0a2a5e;
  --blue: #1e4ea8;
  --bright-blue: #2f6fd8;
  --light-blue: #e8f0fb;
  --white: #ffffff;
  --gray: #4a5568;
  --light-gray: #f5f7fa;
  --border: #d6dfee;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--navy);
  background: var(--white);
  line-height: 1.6;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  color: var(--bright-blue);
  text-decoration: underline;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--navy);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}

.brand:hover {
  text-decoration: none;
  color: var(--blue);
}

.brand img {
  width: 44px;
  height: 44px;
}

nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

nav a {
  color: var(--navy);
  font-weight: 500;
}

nav a.active {
  color: var(--blue);
  border-bottom: 2px solid var(--blue);
  padding-bottom: 4px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  color: var(--white);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.95;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  background: var(--white);
  color: var(--navy);
  border: 2px solid var(--white);
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn:hover {
  background: transparent;
  color: var(--white);
  text-decoration: none;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

.btn-primary:hover {
  background: var(--bright-blue);
  border-color: var(--bright-blue);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}

.btn-outline:hover {
  background: var(--blue);
  color: var(--white);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: var(--white);
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: 0.75rem;
  color: var(--navy);
}

.section-subtitle {
  text-align: center;
  color: var(--gray);
  max-width: 720px;
  margin: 0 auto 3rem;
  font-size: 1.05rem;
}

/* Feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(10, 42, 94, 0.12);
}

.photo-block {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--light-blue), var(--border));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  font-weight: 600;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.photo-block.large {
  aspect-ratio: 16 / 9;
}

.card-body {
  padding: 1.5rem;
}

.card-body h3 {
  color: var(--navy);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.card-body p {
  color: var(--gray);
}

/* Alternating sections */
.bg-light {
  background: var(--light-gray);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.two-col h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--navy);
}

.two-col p {
  color: var(--gray);
  margin-bottom: 1rem;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-num {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--blue);
  display: block;
}

.stat-label {
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

/* CTA */
.cta {
  background: var(--navy);
  color: var(--white);
  text-align: center;
}

.cta h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

/* Form */
form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

label {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: -0.5rem;
}

input, textarea, select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(30, 78, 168, 0.15);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

/* Article body */
.article-body {
  max-width: 760px;
  margin: 0 auto;
}

.article-body h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--navy);
}

.article-body p {
  margin-bottom: 1rem;
  color: var(--gray);
}

.article-body ul {
  margin: 0 0 1rem 1.5rem;
  color: var(--gray);
}

.article-body ul li {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background: var(--navy);
  color: var(--white);
  padding: 2.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

footer h4 {
  margin-bottom: 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

footer ul {
  list-style: none;
}

footer ul li {
  margin-bottom: 0.4rem;
}

footer a {
  color: var(--light-blue);
}

footer a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1rem;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.8;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-brand img {
  width: 40px;
  height: 40px;
}

.footer-brand strong {
  font-size: 1.2rem;
}

/* Mobile */
@media (max-width: 768px) {
  header {
    position: static;
  }
  .hero {
    padding: 3.5rem 0;
  }
  .hero h1 {
    font-size: 2.1rem;
  }
  .hero p {
    font-size: 1.05rem;
  }
  section {
    padding: 3rem 0;
  }
  .nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  .brand {
    justify-content: center;
  }
  header nav {
    width: 100%;
  }
  nav ul {
    gap: 0.5rem 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  nav a.active {
    padding-bottom: 2px;
  }
  .two-col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .cta h2 {
    font-size: 1.75rem;
  }
}