/* ==========================================================================
   SHARED NAV / BANNER / MOBILE-MENU STYLES
   Extracted from the per-page CSS files so new pages can just link this.
   ========================================================================== */

/* ---- Banner ---- */
.banner-container {
  width: 100%;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.banner-content {
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.banner-link {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  background: var(--surface-glass);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-glass);
  text-align: center;
  font-size: 0.875rem;
  transition: opacity 0.3s ease;
}

.banner-link:hover {
  opacity: 0.9;
  color: var(--text-primary);
}

/* ---- Navigation ---- */
.nav-container {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface-glass);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-glass);
}

.nav-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  height: 4rem;
}

/* Base state – mobile first */
.nav-links  { display: none; }
.auth-buttons { display: none; }

/* Navigation Links */
.nav-link {
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 0.375rem;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  position: relative;
  z-index: 1;
}

.nav-link:hover {
  background-color: var(--surface-glass-hover);
  color: var(--text-primary);
}

.nav-link.active {
  background-color: var(--surface-glass-hover);
  border: 1px solid var(--border-glass);
}

/* Desktop Dropdown Styles */
.nav-item.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown-toggle { cursor: pointer; }

.dropdown-arrow {
  margin-left: 0.4em;
  font-size: 0.7em;
  transition: transform var(--transition-speed) ease;
  display: inline-block;
  vertical-align: middle;
}

.nav-dropdown-menu {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  min-width: 200px;
  padding: 0.5rem 0;
  background: var(--dropdown-bg);
  backdrop-filter: blur(15px);
  border: 1px solid var(--border-glass);
  border-radius: 0.5rem;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(5px);
  pointer-events: none;
  transition: opacity var(--transition-speed) ease,
    visibility var(--transition-speed) ease,
    transform var(--transition-speed) ease;
}

.nav-item.nav-dropdown:hover > .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-item.nav-dropdown:hover > .nav-dropdown-toggle .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-item {
  display: block;
  padding: 0.6rem 1.2rem;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

.nav-dropdown-item:hover,
.nav-dropdown-item:focus,
.nav-dropdown-item.active {
  background-color: var(--surface-glass-hover);
  color: var(--text-primary);
  text-decoration: none;
}

/* ---- Mobile Menu Button ---- */
.mobile-menu-button {
  display: block;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: 0.5rem;
  cursor: pointer;
  transition: opacity var(--transition-speed);
  z-index: 51;
}

.mobile-menu-button:hover { opacity: 0.8; }

/* ---- Mobile Menu Panel ---- */
.mobile-menu {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  backdrop-filter: blur(12px);
  padding: 1rem 0;
  overflow-y: auto;
  transform: translateY(-100%);
  transition: transform var(--transition-speed) ease-out;
  z-index: 49;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
  transform: translateY(0);
  display: block;
}

.mobile-menu .nav-link:not(.sub-link),
.mobile-menu .mobile-submenu-toggle {
  display: block;
  padding: 0.9rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
  text-decoration: none;
  font-size: 1rem;
  width: 100%;
  box-sizing: border-box;
  color: var(--text-primary);
}

.mobile-menu > *:not(.mobile-menu-section):not(.auth-buttons-mobile):last-of-type {
  border-bottom: none;
}

.mobile-menu .mobile-menu-section:last-of-type > .mobile-submenu-toggle {
  border-bottom: none;
}

/* Mobile Submenu */
.mobile-submenu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-submenu-toggle .dropdown-arrow {
  transition: transform var(--transition-speed) ease;
  font-size: 0.9em;
}

.mobile-submenu-toggle[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
}

.mobile-submenu {
  background-color: rgba(0, 0, 0, 0.1);
  padding-left: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease-out;
}

.mobile-submenu .sub-link {
  display: block;
  padding: 0.75rem 1.5rem 0.75rem 2.5rem;
  text-align: left;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

.mobile-submenu .sub-link:last-child { border-bottom: none; }

.mobile-submenu .sub-link:hover,
.mobile-submenu .sub-link.active {
  background-color: var(--surface-glass);
  color: var(--text-primary);
}

.mobile-menu .auth-buttons-mobile {
  border-top: 1px solid var(--border-glass);
  padding-top: 1.5rem;
  margin-top: 1rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-bottom: 1rem;
}

.auth-buttons-mobile {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 0.75rem;
}

/* ---- Logo ---- */
.nav-logo-link {
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0.25rem 0;
  margin-right: 1rem;
}

.nav-logo-img {
  height: 32px;
  width: auto;
  max-height: calc(100% - 0.5rem);
  transition: height var(--transition-speed) ease;
  display: block;
}

/* ---- Mobile Menu Button Variants ---- */
.mobile-menu .button {
  width: 100%;
  text-align: center;
  padding: 0.75rem 0.5rem;
  font-size: 1rem;
}

.mobile-menu .button-primary {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
}

.mobile-menu .button-primary:hover {
  background: var(--surface-glass-hover);
}

.mobile-menu .button-outline {
  border: 1px solid var(--border-glass);
  background: transparent;
}

.mobile-menu .button-outline:hover {
  background: var(--surface-glass);
}

/* ==========================================================================
   RESPONSIVE – NAV
   ========================================================================== */
@media (max-width: 640px) {
  .banner-link {
    font-size: 0.75rem;
    padding: 0.5rem;
  }
}

@media (max-width: 859px) {
  .nav-links,
  .auth-buttons {
    display: none;
  }

  .mobile-menu-button {
    display: block;
    margin-left: auto;
  }

  .nav-container { height: 4rem; }

  .mobile-menu {
    top: 3.5rem;
    max-height: calc(100vh - 3.5rem);
  }

  .nav-logo-img  { height: 64px; }
  .nav-logo-link { margin-right: 0.5rem; }
}

@media (min-width: 860px) {
  .mobile-menu-button { display: none; }
  .mobile-menu { display: none !important; }

  .nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: 1rem;
    margin-right: auto;
  }

  .nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }

  .auth-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: 1rem;
  }

  .nav-content  { height: 4rem; }
  .nav-logo-img { height: 64px; }
  .nav-logo-link { margin-right: 1rem; }
}

@media (min-width: 1024px) {
  .nav-links { gap: 1rem; }
  .nav-link  { padding: 0.5rem 1rem; font-size: 0.95rem; }
  .auth-buttons { gap: 0.75rem; }
}

@media (min-width: 1280px) {
  .nav-content,
  .footer-container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
  .nav-links { gap: 1.5rem; }
}