/* ===== NAVBAR STYLES ===== */
/* Modern, responsive navigation with clean layout and accessibility */

:root {
  --nav-height: 72px;
  --nav-bg: rgba(7, 10, 18, 0.85);
  --nav-border: rgba(234, 242, 255, 0.10);
  --nav-blur: blur(12px);
  --nav-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Header Container ===== */
.top {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  transition: var(--nav-transition);
}

/* ===== Navigation Container ===== */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: var(--nav-height);
  padding: 0;
  position: relative;
}

/* ===== Brand/Logo ===== */
.brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  z-index: 1001;
}

.brand img {
  width: 140px;
  height: auto;
}

/* ===== Main Menu ===== */
.menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);

  flex: 1;
  min-width: 0;              /* important: allow shrinking */

  justify-content: flex-start; /* don't center into the logo */
  margin: 0;                  /* remove auto-centering */
  max-width: none;            /* remove the cap */

  overflow-x: auto;           /* if too many items, scroll instead of overlap */
  overflow-y: hidden;
  white-space: nowrap;
  padding: 0 var(--space-sm);
}

/* optional: hide scrollbar (keeps scroll working) */
.menu::-webkit-scrollbar { height: 0; }
.menu { scrollbar-width: none; }


.menu > a,
.menu .dropdown {
  flex-shrink: 0;
  white-space: nowrap;
}

.menu > a {
  padding: var(--space-sm) var(--space-md);
  border-radius: 10px;
  color: rgba(234, 242, 255, 0.85);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-tight);
  transition: background 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
}

.menu > a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.menu > a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.menu > a.active {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.30);
  color: var(--text);
  font-weight: var(--fw-semibold);
}

/* ===== Dropdown Menu ===== */
.dropdown {
  position: relative;
  display: inline-flex;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: 10px;
  color: rgba(234, 242, 255, 0.85);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-tight);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
  background: transparent;
  user-select: none;
}

.dropdown-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.dropdown-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.dropdown-toggle::after {
  content: "▾";
  font-size: 0.75em;
  transition: transform 0.2s ease;
  opacity: 0.7;
}

.dropdown.open .dropdown-toggle::after {
  transform: rotate(180deg);
}

.dropdown.open .dropdown-toggle {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

/* Dropdown Menu Content */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: rgba(11, 16, 32, 0.98);
  border: 1px solid var(--nav-border);
  border-radius: 12px;
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 2000;
  overflow: hidden;
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  color: rgba(234, 242, 255, 0.85);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

.dropdown-menu a:first-child {
  margin-top: 4px;
}

.dropdown-menu a:last-child {
  margin-bottom: 4px;
}

.dropdown-menu a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  padding-left: calc(var(--space-md) + 4px);
}

.dropdown-menu a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

/* ===== Navigation CTA (Login & Demo Buttons) ===== */
.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  z-index: 1001;
}

.nav-cta .btn {
  white-space: nowrap;
}

/* Burger Menu Button (Hidden on Desktop) */
.burger {
  display: none;
  font-size: 1.5rem;
  padding: var(--space-xs) var(--space-sm);
  min-width: 44px;
  min-height: 44px;
}

/* ===== RESPONSIVE: TABLET AND MOBILE ===== */
@media (max-width: 1199px) {
  .menu {
    gap: 4px;
  }
  
  .menu > a,
  .dropdown-toggle {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8125rem;
  }
}

/* Mobile Breakpoint */
@media (max-width: 767px) {
  :root {
    --nav-height: 60px;
  }

  .nav {
    min-height: var(--nav-height);
    padding: var(--space-sm) 0;
  }

  .brand img {
    width: 120px;
  }

  /* Show burger menu */
  .burger {
    display: inline-flex;
    order: 1;
  }

  /* Hide Login button on mobile (will show in menu) */
  .nav-cta > .btn:not(.btn-primary):not(.burger) {
    display: none;
  }

  /* Main Menu: Slide-down Panel */
  .menu {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    top: var(--nav-height);
    max-height: 0;
    overflow: hidden;
    background: rgba(7, 10, 18, 0.98);
    border-bottom: 1px solid var(--nav-border);
    backdrop-filter: var(--nav-blur);
    -webkit-backdrop-filter: var(--nav-blur);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    margin: 0;
    max-width: 100%;
    z-index: 999;
  }

  .menu.open {
    display: flex;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    padding: var(--space-md);
  }

  .menu > a {
    width: 100%;
    padding: var(--space-md);
    border-radius: 8px;
    border: 1px solid rgba(234, 242, 255, 0.08);
    margin-bottom: var(--space-xs);
    text-align: left;
  }

  /* Dropdown in Mobile */
  .dropdown {
    width: 100%;
    display: flex;
    flex-direction: column;
  }

  .dropdown-toggle {
    width: 100%;
    justify-content: space-between;
    padding: var(--space-md);
    border: 1px solid rgba(234, 242, 255, 0.08);
    border-radius: 8px;
    margin-bottom: var(--space-xs);
  }

  .dropdown.open .dropdown-toggle {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    margin-bottom: 0;
  }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    border-top: none;
    border-radius: 0 0 8px 8px;
    margin-bottom: var(--space-xs);
    max-height: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .dropdown.open .dropdown-menu {
    max-height: 400px;
  }

  .dropdown-menu a {
    padding: var(--space-sm) var(--space-lg);
    border-left: 3px solid transparent;
  }

  .dropdown-menu a:hover {
    border-left-color: var(--primary);
    padding-left: var(--space-lg);
  }

  /* Add Login button to mobile menu */
  .menu::before {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background: var(--nav-border);
    margin: var(--space-sm) 0;
  }

  /* Mobile menu items styling */
  .menu > a:last-of-type {
    margin-bottom: var(--space-md);
  }
}

/* Prevent body scroll when mobile menu is open */
body.menu-open {
  overflow: hidden;
}

/* ===== ACCESSIBILITY ENHANCEMENTS ===== */
/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: var(--bg);
  padding: var(--space-sm) var(--space-md);
  z-index: 10000;
  border-radius: 0 0 8px 0;
  font-weight: var(--fw-semibold);
  transition: top 0.2s ease;
}

.skip-to-main:focus {
  top: 0;
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* Focus visible styles for all interactive elements */
.nav a:focus-visible,
.nav button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 8px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .top {
    border-bottom-width: 2px;
  }
  
  .menu > a,
  .dropdown-toggle {
    border: 2px solid transparent;
  }
  
  .menu > a.active,
  .dropdown.open .dropdown-toggle {
    border-color: var(--primary);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .menu,
  .dropdown-menu,
  .dropdown-toggle::after,
  .menu > a,
  .dropdown-toggle {
    transition: none;
  }
}

/* ===== DESKTOP OPTIMIZATIONS (≥ 1200px) ===== */
@media (min-width: 1200px) {
  .nav {
    gap: var(--space-xl);
  }

  .menu {
    gap: var(--space-xs);
  }

  .menu > a,
  .dropdown-toggle {
    padding: var(--space-sm) var(--space-md);
  }
}