/* ═══════════════════════════════════════════════════════════════════════════════
   SHARED COMPONENTS: Header, Footer, Mobile Navigation
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   HEADER / NAVIGATION
   ───────────────────────────────────────────────────────────────────────────── */

.site-header {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 250, 250, 0.96));
  border-bottom: 1px solid rgba(11, 18, 36, 0.08);
  position: sticky;
  top: 0;
  z-index: 999;
  box-shadow: 0 2px 8px rgba(11, 18, 36, 0.04);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  font-size: 22px;
  font-weight: 900;
  color: #071a33;
  text-decoration: none;
  letter-spacing: -0.6px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.tag {
  color: #6b7280;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   DESKTOP NAVIGATION (Hidden on Mobile)
   ───────────────────────────────────────────────────────────────────────────── */

.desktop-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: #6b7280;
  text-decoration: none;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.nav-link:hover {
  color: #fff;
  background: linear-gradient(135deg, #1A56DB, #1E40AF);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 86, 219, 0.15);
}

.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, #1A56DB, #1E40AF);
  box-shadow: 0 8px 24px rgba(26, 86, 219, 0.2);
}

/* ─────────────────────────────────────────────────────────────────────────────
   HAMBURGER MENU BUTTON (Mobile Only)
   ───────────────────────────────────────────────────────────────────────────── */

.hamburger-btn {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.3s ease;
}

.hamburger-btn:hover {
  background: rgba(11, 18, 36, 0.05);
}

.hamburger-line {
  width: 24px;
  height: 2.5px;
  background: #071a33;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Hamburger → X animation when menu is open */
.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ─────────────────────────────────────────────────────────────────────────────
   MOBILE NAVIGATION MENU
   ───────────────────────────────────────────────────────────────────────────── */

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid rgba(11, 18, 36, 0.08);
  box-shadow: 0 10px 30px rgba(11, 18, 36, 0.12);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
              padding 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 998;
}

.mobile-nav.open {
  max-height: 500px;
  padding: 12px 0;
}

.mobile-nav-link {
  color: #334155;
  text-decoration: none;
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
  display: block;
  letter-spacing: 0.01em;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: rgba(26, 86, 219, 0.06);
  color: #0B2545;
  border-left-color: #1A56DB;
  padding-left: 24px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   MOBILE-ONLY RESPONSIVE BEHAVIOR
   ───────────────────────────────────────────────────────────────────────────── */

/* Show hamburger menu and hide desktop nav on mobile (<768px) */
@media (max-width: 767px) {
  .hamburger-btn {
    display: flex;
  }

  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: flex;
  }

  .header-container {
    padding: 12px 16px;
  }

  .logo {
    font-size: 18px;
  }

  .tag {
    display: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   FOOTER / SOCIAL
   ═══════════════════════════════════════════════════════════════════════════════ */

.site-footer {
  background: linear-gradient(180deg, #0f172a, #1a1f35);
  color: #d1d5db;
  padding: 48px 20px 24px;
  margin-top: 60px;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  color: #d1d5db;
  text-decoration: none;
  font-size: 13px;
  transition: all 0.2s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: #34D399;
  transform: translateX(4px);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  font-size: 12px;
  margin: 0;
  line-height: 1.6;
}

.contact-item a {
  color: #34D399;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.contact-item a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SOCIAL ICONS
   ───────────────────────────────────────────────────────────────────────────── */

.social-icons {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 14px;
  font-weight: 700;
}

.social-icons a:hover {
  background: linear-gradient(135deg, #1A56DB, #3B82F6);
  transform: translateY(-3px);
  color: #fff;
}

.social-icon {
  display: block;
}

/* ─────────────────────────────────────────────────────────────────────────────
   FOOTER BOTTOM
   ───────────────────────────────────────────────────────────────────────────── */

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

.footer-copyright {
  font-size: 12px;
  color: #9ca3af;
  margin: 0;
}

.footer-copyright p {
  margin: 0;
}

.footer-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.badge {
  font-size: 11px;
  font-weight: 700;
  color: #34D399;
  background: rgba(52, 211, 153, 0.1);
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid rgba(52, 211, 153, 0.2);
  white-space: nowrap;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   UTILITY: NAV OPEN STATE (Body scroll lock)
   ═══════════════════════════════════════════════════════════════════════════════ */

body.nav-open {
  overflow: hidden;
}

/* Overlay when mobile nav is open (optional visual effect) */
@media (max-width: 767px) {
  .mobile-nav.open::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: -1;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   ACCESSIBILITY IMPROVEMENTS
   ═══════════════════════════════════════════════════════════════════════════════ */

/* Visible focus state for keyboard navigation */
.nav-link:focus-visible,
.mobile-nav-link:focus-visible,
.footer-links a:focus-visible,
.social-icons a:focus-visible {
  outline: 3px solid #1A56DB;
  outline-offset: 2px;
  border-radius: 4px;
}

.hamburger-btn:focus-visible {
  outline: 3px solid #1A56DB;
  outline-offset: 2px;
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .nav-link,
  .logo,
  .hamburger-line,
  .mobile-nav,
  .hamburger-btn,
  .footer-links a,
  .social-icons a {
    transition: none !important;
    animation: none !important;
  }
}