/**
 * WebClinic Navigation Component Styles
 * Modern, accessible, performant navigation
 * @version 2.0.0
 */

/* ========================================
   DESIGN TOKENS
   ======================================== */

:root {
  /* Navigation - Increased height to meet hero section */
  --nav-height: 6rem;
  --nav-height-mobile: 5rem;
  --nav-bg: rgba(17, 24, 39, 0.95);
  --nav-bg-scrolled: rgba(17, 24, 39, 0.98);
  --nav-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --nav-shadow-scrolled: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);

  /* Colors */
  --nav-link-color: #d1d5db;
  --nav-link-hover: #ffffff;
  --nav-link-active: #3b82f6;

  /* Transitions */
  --nav-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-menu-transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                         opacity 0.3s ease-in-out,
                         visibility 0.3s;

  /* Mobile menu - Full screen on small devices, sidebar on larger */
  --menu-bg: rgba(15, 23, 42, 0.98);
  --menu-width: 100%;
  --menu-max-width: 100%; /* Full width by default */
  --overlay-bg: rgba(0, 0, 0, 0.5);

  /* Z-index scale - Must be above floating chat (9999) but below cookie modal (99999) */
  --z-nav: 10000;
  --z-overlay: 9999;
  --z-menu: 10001;
}

/* ========================================
   NAVIGATION CONTAINER
   ======================================== */

[data-nav="main"] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height-mobile);
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--nav-transition);
  will-change: transform, background-color, box-shadow;
}

/* Scrolled state */
[data-nav="main"][data-scrolled="true"] {
  background: var(--nav-bg-scrolled);
  box-shadow: var(--nav-shadow-scrolled);
}

/* Desktop */
@media (min-width: 1024px) {
  [data-nav="main"] {
    height: var(--nav-height);
  }
}

/* ========================================
   NAVIGATION INNER
   ======================================== */

.nav__inner {
  max-width: 80rem;
  height: 100%;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .nav__inner {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .nav__inner {
    padding: 0 2rem;
  }
}

/* ========================================
   LOGO
   ======================================== */

.nav__logo {
  flex-shrink: 0;
  height: 2.5rem;
  transition: transform 0.2s ease;
}

.nav__logo:hover {
  transform: scale(1.05);
}

.nav__logo img {
  height: 100%;
  width: auto;
  object-fit: contain;
}

/* ========================================
   DESKTOP MENU
   ======================================== */

.nav__desktop {
  display: none;
  align-items: center;
  gap: 2rem;
  height: 100%;
}

@media (min-width: 1024px) {
  .nav__desktop {
    display: flex;
  }
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  position: relative;
  padding: 0.5rem 0.75rem;
  color: var(--nav-link-color);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.375rem;
  transition: var(--nav-transition);
  cursor: pointer;
}

.nav__link:hover {
  color: var(--nav-link-hover);
  background: rgba(255, 255, 255, 0.05);
}

/* Active state with indicator */
.nav__link.is-active {
  color: var(--nav-link-active);
}

.nav__link.is-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--nav-link-active);
  border-radius: 2px;
}

/* CTA Button */
.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
  transition: var(--nav-transition);
  text-decoration: none;
}

.nav__cta:hover {
  box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

.nav__cta i {
  margin-right: 0.25rem;
}

/* ========================================
   MOBILE TOGGLE
   ======================================== */

[data-nav="toggle"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  color: var(--nav-link-color);
  background: transparent;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: var(--nav-transition);
  position: relative;
  z-index: var(--z-menu);
}

[data-nav="toggle"]:hover {
  color: var(--nav-link-hover);
  background: rgba(255, 255, 255, 0.05);
}

[data-nav="toggle"]:focus-visible {
  outline: 2px solid var(--nav-link-active);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  [data-nav="toggle"] {
    display: none;
  }
}

/* Hamburger icon */
.nav__toggle-icon {
  position: relative;
  width: 1.5rem;
  height: 1.125rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav__toggle-line {
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s ease;
}

/* Animated to X when open */
[data-menu-open="true"] .nav__toggle-line:nth-child(1) {
  transform: translateY(0.5rem) rotate(45deg);
}

[data-menu-open="true"] .nav__toggle-line:nth-child(2) {
  opacity: 0;
}

[data-menu-open="true"] .nav__toggle-line:nth-child(3) {
  transform: translateY(-0.5rem) rotate(-45deg);
}

/* ========================================
   MOBILE MENU
   ======================================== */

[data-nav="menu"] {
  position: fixed;
  top: var(--nav-height-mobile);
  right: 0;
  bottom: 0;
  left: 0; /* Full width on small screens */
  width: 100%;
  max-width: 100%; /* Full width by default */
  background: var(--menu-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--nav-menu-transition);
  overflow-y: auto;
  overscroll-behavior: contain;
  z-index: var(--z-menu);
}

[data-nav="menu"].is-open {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

/* Sidebar menu on medium+ screens (600px+) */
@media (min-width: 600px) {
  [data-nav="menu"] {
    left: auto; /* Reset left positioning */
    max-width: 24rem; /* Sidebar width */
    box-shadow: -4px 0 6px -1px rgba(0, 0, 0, 0.1);
  }
}

/* Hide on desktop */
@media (min-width: 1024px) {
  [data-nav="menu"] {
    display: none;
  }
}

/* Menu content */
.nav__menu-content {
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 100%;
}

/* Mobile menu links - Responsive sizing */
.nav__menu-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1rem;
  color: var(--nav-link-color);
  font-size: 1.125rem; /* Larger on mobile for better touch targets */
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--nav-transition);
  position: relative;
}

/* Adjust font size on larger screens */
@media (min-width: 600px) {
  .nav__menu-link {
    font-size: 1rem;
    padding: 1rem;
  }
}

.nav__menu-link:hover {
  color: var(--nav-link-hover);
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(0.25rem);
}

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

.nav__menu-link.is-active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--nav-link-active);
  border-radius: 0 2px 2px 0;
}

/* Arrow icon */
.nav__menu-link i {
  font-size: 1rem;
  opacity: 0.6;
  transition: transform 0.2s ease;
}

.nav__menu-link:hover i {
  transform: translateX(0.25rem);
}

/* Mobile CTA */
.nav__menu-cta {
  margin-top: auto;
  padding-top: 2rem;
}

.nav__menu-cta .nav__cta {
  width: 100%;
  justify-content: center;
  padding: 1rem;
  font-size: 1rem;
}

/* ========================================
   OVERLAY
   ======================================== */

[data-nav="overlay"] {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
  z-index: var(--z-overlay);
}

[data-nav="overlay"].is-visible {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 1024px) {
  [data-nav="overlay"] {
    display: none;
  }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Focus visible styles */
.nav__link:focus-visible,
.nav__menu-link:focus-visible {
  outline: 2px solid var(--nav-link-active);
  outline-offset: 2px;
  border-radius: 0.375rem;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Stagger menu items animation */
.nav__menu-link {
  opacity: 0;
  animation: none;
}

.is-open .nav__menu-link {
  animation: slideInRight 0.3s ease-out forwards;
}

.is-open .nav__menu-link:nth-child(1) { animation-delay: 0.05s; }
.is-open .nav__menu-link:nth-child(2) { animation-delay: 0.1s; }
.is-open .nav__menu-link:nth-child(3) { animation-delay: 0.15s; }
.is-open .nav__menu-link:nth-child(4) { animation-delay: 0.2s; }
.is-open .nav__menu-link:nth-child(5) { animation-delay: 0.25s; }
.is-open .nav__menu-link:nth-child(6) { animation-delay: 0.3s; }

/* ========================================
   UTILITIES
   ======================================== */

/* No scroll when menu is open (mobile) */
[data-menu-open="true"] body {
  overflow: hidden;
}

/* Print styles */
@media print {
  [data-nav="main"] {
    position: static;
    box-shadow: none;
    border-bottom: 1px solid #ccc;
  }

  [data-nav="toggle"],
  [data-nav="overlay"] {
    display: none;
  }

  .nav__desktop {
    display: flex;
  }
}