/* ============================================
   Header & Navigation Styles
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 120px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo img {
  height: 100px;
  width: auto;
}

.logo-text {
  display: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  position: relative;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent-color);
  background-color: rgba(62, 146, 204, 0.08);
}

.nav-link.active {
  color: var(--accent-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 24px;
  height: 2px;
  background: var(--accent-color);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

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

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

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

/* Header Responsive */
@media (max-width: 768px) {
  .nav {
    justify-content: center;
    position: relative;
  }

  .logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .logo img {
    height: 70px;
    width: auto;
  }

  .menu-toggle {
    position: absolute;
    right: 0;
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 120px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 16px;
  }
}