/* ===== MAIN HEADER STYLES ===== */
.header_section {
  background-color: var(--header-bg);
  box-shadow: var(--header-shadow);
  position: sticky;
  top: 0;
  z-index: var(--z-index-sticky);
  transition: var(--transition-all);
}

.custom_nav-container {
  padding: var(--spacing-md) 0;
}

/* ===== BRAND STYLES ===== */
.navbar-brand {
  font-size: var(--navbar-brand-size-desktop);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color) !important;
  text-decoration: none;
  transition: var(--transition-all);
  cursor: pointer;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.navbar-brand img {
  width: 3.5rem;
  height: 3.5rem;
}

.navbar-brand:hover {
  color: var(--primary-hover) !important;
  transform: scale(1.05);
}

.navbar-brand span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== NAVIGATION STYLES ===== */
.navbar-nav .nav-link {
  color: var(--text-primary) !important;
  font-weight: var(--font-weight-medium);
  margin: var(--navbar-link-margin);
  padding: var(--navbar-link-padding) !important;
  border-radius: var(--border-radius-xl);
  transition: var(--transition-all);
  position: relative;
}

.navbar-nav .nav-link:hover {
  color: var(--primary-color) !important;
  background-color: var(--bg-primary-light);
  transform: translateY(-2px);
}

.navbar-nav .nav-item.active .nav-link {
  color: var(--text-white) !important;
  background-color: var(--primary-color);
  box-shadow: var(--shadow-primary);
}

/* ===== CTA BUTTON STYLES ===== */
.cta-button {
  background: var(--primary-gradient);
  color: var(--text-white) !important;
  padding: var(--btn-padding-md);
  border-radius: var(--btn-border-radius);
  text-decoration: none;
  font-weight: var(--btn-font-weight);
  transition: var(--transition-all);
  box-shadow: var(--shadow-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary-hover);
  color: var(--text-white) !important;
}

.cta-button i {
  font-size: var(--font-size-lg);
}

/* ===== HAMBURGER MENU STYLES ===== */
.navbar-toggler {
  border: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  width: 40px;
  height: 40px;
  position: relative;
  cursor: pointer;
}

.navbar-toggler:focus {
  box-shadow: none;
}

.navbar-toggler-icon {
  background: none !important;
  width: var(--hamburger-width);
  height: var(--hamburger-height);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: var(--hamburger-line-height);
  background-color: var(--hamburger-color);
  border-radius: 1px;
  transition: var(--transition-all);
  transform-origin: center;
}

.navbar-toggler[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.navbar-toggler[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 991.98px) {
  .navbar-nav {
    margin: var(--spacing-md) 0;
    text-align: center;
  }

  .navbar-brand {
    font-size: var(--navbar-brand-size-tablet);
    display: flex;
    gap: 0.5rem;
    align-items: center;
  }

  .navbar-brand img {
    width: 3rem;
    height: 3rem;
  }

  .cta-button {
    margin-top: var(--spacing-md);
    justify-content: center;
  }

  .navbar-collapse .d-flex {
    justify-content: center;
  }

  .navbar-collapse {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-md);
  }
}

@media (max-width: 576px) {
  .custom_nav-container {
    padding: var(--spacing-sm) 0;
  }

  .cta-button {
    padding: var(--btn-padding-sm);
    font-size: var(--font-size-sm);
  }

  .navbar-brand {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    font-size: var(--navbar-brand-size-mobile);
  }

  .navbar-brand img {
    width: 2rem;
    height: 2rem;
  }
}

/* ===== UTILITY CLASSES ===== */
.fade-in {
  animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== SMOOTH SCROLLING ===== */
html {
  scroll-behavior: smooth;
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
.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;
}