/* Header and Navigation Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--primary-dark);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: 10px 0;
  height: 90px; /* taller header for better logo visibility */
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(11, 42, 107, 0.95);
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.25rem;
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
}

.logo img {
  max-height: 90px; /* allow larger logo within taller header */
  max-width: 90px;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
  transition: var(--transition);
}

.nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav .btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.95rem;
}

.nav a:not(.btn) {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--anim-duration) ease;
}

.nav a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-light);
  transition: width var(--anim-duration) ease;
}

.nav a:not(.btn):hover {
  color: var(--white);
}

.nav a:not(.btn):hover::after {
  width: 100%;
}

/* Hamburger Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  border-radius: 3px;
  background: var(--primary-light);
  transition: var(--transition);
}

/* Mobile Navigation */
@media (max-width: 992px) {
  .header-content {
    padding: 0 1rem;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background: linear-gradient(180deg, var(--primary-dark), var(--primary));
    flex-direction: column;
    padding: 80px 2rem;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }

  .nav.active {
    right: 0;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 6px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .nav a {
    font-size: 1.1rem;
    padding: 1rem 0;
    width: 100%;
    text-align: center;
    color: rgba(255, 255, 255, 0.9);
  }

  .nav .btn {
    margin-top: 1rem;
    width: 100%;
  }
}