* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; color: #333; line-height: 1.6; }

/* ─── HEADER & NAV ─── */
header { background: white; border-bottom: 1px solid #e0e0e0; padding: 1rem 0; position: sticky; top: 0; z-index: 100; }
nav { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 2rem; position: relative; }
.logo-container { display: flex; align-items: center; gap: 1rem; }
.logo { width: 320px; height: 110px; display: flex; align-items: center; justify-content: center; }
.logo img { width: 100%; height: 100%; object-fit: contain; }
.nav-links { display: flex; gap: 2rem; align-items: center; list-style: none; }
.nav-links a { text-decoration: none; color: #333; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: #1f3a5f; }
.dropdown { position: relative; }
.dropdown-toggle { cursor: pointer; display: flex; align-items: center; gap: 0.3rem; }
.dropdown-menu { position: absolute; top: 100%; left: 0; background: white; border: 1px solid #e0e0e0; border-radius: 8px; padding: 1rem 0; min-width: 250px; opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.3s; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu a { display: block; padding: 0.7rem 1.5rem; color: #333; text-decoration: none; transition: background 0.3s; }
.dropdown-menu a:hover { background: #e8f1f8; color: #1f3a5f; }
.cta-button { background: white; color: #1f3a5f; border: 2px solid #1f3a5f; padding: 0.6rem 1.5rem; border-radius: 4px; text-decoration: none; font-weight: 500; transition: all 0.3s; }
.cta-button:hover { background: #1f3a5f; color: white; }

/* ─── HAMBURGER ─── */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: .5rem; background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: #1f3a5f; border-radius: 2px; transition: all .3s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── BUTTONS ─── */
.primary-button { background: #1f3a5f; color: white; padding: 1rem 2.5rem; border: none; border-radius: 4px; font-size: 1rem; font-weight: 500; cursor: pointer; text-decoration: none; display: inline-block; transition: background 0.3s; }
.primary-button:hover { background: #4b8dc6; }

/* ─── FOOTER ─── */
footer { background: #f8f9fa; padding: 3rem 2rem; border-top: 1px solid #e0e0e0; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 3rem; }
.footer-section { display: flex; gap: 1.5rem; }
.footer-logo { width: 320px; height: 110px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.footer-logo img { width: 100%; height: 100%; object-fit: contain; }
.footer-section h3 { color: #333; margin-bottom: 1rem; font-size: 1.2rem; }
.footer-section p { color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-links { display: none; position: absolute; top: 100%; left: 0; width: 100%; background: white; flex-direction: column; gap: 0; border-top: 1px solid #e0e0e0; box-shadow: 0 8px 16px rgba(0,0,0,.08); z-index: 99; }
    .nav-links.open { display: flex; }
    .nav-links li { width: 100%; border-bottom: 1px solid #f3f4f6; }
    .nav-links a, .nav-links .dropdown-toggle { display: block; padding: 1rem 1.5rem; width: 100%; }
    .nav-links .cta-button { margin: 1rem 1.5rem; display: inline-block; width: auto; }
    .dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; border-top: 1px solid #f3f4f6; display: none; padding: 0; }
    .dropdown.open .dropdown-menu { display: block; }
    .dropdown-menu a { padding-left: 2.5rem; font-size: .9rem; }
}

/* ─── ACCESSIBILITY ─── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}