:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f9;
  --color-text: #1a2233;
  --color-text-muted: #5b6472;
  --color-navy: #0f2540;
  --color-navy-dark: #0a1a2e;
  --color-accent: #1fb6c1;
  --color-accent-dark: #158d96;
  --color-border: #e2e6eb;
  --max-width: 1100px;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  background: var(--color-navy);
  color: #fff;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.logo .accent {
  color: var(--color-accent);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: #d7dee7;
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: #fff;
  text-decoration: none;
}

.main-nav a[aria-current="page"] {
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 4px;
}

.nav-toggle {
  display: none;
}

/* Hero */
.hero {
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.09) 1px, transparent 1px),
    linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
  background-size: 22px 22px, cover;
  color: #fff;
  padding: 90px 0;
}

.hero h1 {
  font-size: 2.6rem;
  margin: 0 0 16px;
  max-width: 720px;
}

.hero p {
  font-size: 1.15rem;
  color: #c7d0dc;
  max-width: 600px;
  margin: 0 0 32px;
}

.page-header {
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.09) 1px, transparent 1px),
    var(--color-navy);
  background-size: 22px 22px, cover;
  color: #fff;
  padding: 56px 0;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 2.1rem;
}

.page-header p {
  color: #c7d0dc;
  margin: 0;
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-navy-dark);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  text-decoration: none;
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-outline:hover {
  border-color: #fff;
  text-decoration: none;
}

.btn-outline-dark {
  border: 1px solid var(--color-navy);
  color: var(--color-navy);
}

.btn-outline-dark:hover {
  background: var(--color-navy);
  color: #fff;
  text-decoration: none;
}

/* Sections */
section {
  padding: 64px 0;
}

section.alt {
  background: var(--color-bg-alt);
}

h2 {
  font-size: 1.7rem;
  margin: 0 0 12px;
}

.section-intro {
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 0 40px;
}

/* Cards / grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 1px 3px rgba(15, 37, 64, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(15, 37, 64, 0.12);
  border-color: var(--color-accent);
}

.card-icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  color: var(--color-accent-dark);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  color: var(--color-navy);
}

.card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Contact */
.contact-info {
  display: grid;
  gap: 24px;
  max-width: 480px;
}

.contact-info dt {
  font-weight: 600;
  color: var(--color-navy);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-info dd {
  margin: 4px 0 0;
  font-size: 1.05rem;
}

/* Footer */
.site-footer {
  background: var(--color-navy-dark);
  color: #9fabbc;
  padding: 32px 0;
  font-size: 0.9rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.site-footer a {
  color: #c7d0dc;
}

/* Scroll reveal (progressive enhancement, see assets/js/main.js) */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 720px) {
  .site-header .container {
    flex-wrap: wrap;
  }

  .main-nav ul {
    gap: 18px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 56px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  section {
    padding: 44px 0;
  }
}