/* ============================================
   NAVBAR STYLES — Modern & Accessible
   Mobile-first, BEM methodology, 
   CSS Custom Properties, WCAG 2.2 AA
   ============================================ */

/* --- CSS Variables (Design Tokens) --- */
:root {
  /* Colors */
  --navbar-bg: #ffffff;
  --navbar-text: #212121;
  --navbar-text-muted: #666666;
  --navbar-primary: #09639e;
  --navbar-primary-dark: #074a75;
  --navbar-accent: #ff6b35;
  --navbar-border: rgba(0, 0, 0, 0.08);
  --navbar-overlay: rgba(0, 0, 0, 0.5);
  
  /* Top bar */
  --topbar-bg: #1F2845;
  --topbar-text: rgba(255, 255, 255, 0.9);
  --topbar-text-muted: rgba(255, 255, 255, 0.7);
  
  /* Spacing */
  --navbar-height: 70px;
  --navbar-height-sticky: 60px;
  --topbar-height: 40px;
  --container-max: 1320px;
  --container-padding: 1rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  /* Z-index scale */
  --z-header: 1000;
  --z-overlay: 999;
  --z-drawer: 1001;
  --z-skip: 10000;
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ============================================
   SKIP LINK (Accessibility)
   ============================================ */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: var(--z-skip);
  padding: 0.75rem 1.5rem;
  background: var(--navbar-primary);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid #fff;
  outline-offset: 2px;
}

/* ============================================
   SITE HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--navbar-bg);
  transition: box-shadow var(--transition-normal);
}

.site-header[data-sticky="true"].is-stuck {
  box-shadow: var(--shadow-md);
}

.site-header[data-sticky="true"].is-stuck .top-bar {
  margin-top: calc(-1 * var(--topbar-height));
  opacity: 0;
  pointer-events: none;
}

/* ============================================
   TOP BAR
   ============================================ */
.top-bar {
  background: var(--topbar-bg);
  color: var(--topbar-text);
  font-size: 0.85rem;
  height: var(--topbar-height);
  overflow: hidden;
  transition: margin-top var(--transition-normal), opacity var(--transition-normal);
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.top-bar__left,
.top-bar__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.top-bar__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--topbar-text);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

a.top-bar__item:hover,
a.top-bar__item:focus-visible {
  color: #fff;
}

.top-bar__item .icon {
  flex-shrink: 0;
  opacity: 0.7;
}

.top-bar__divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.2);
}

.top-bar__separator {
  margin-inline: 0.4rem;
  opacity: 0.4;
}

.top-bar__label {
  color: var(--topbar-text-muted);
  font-size: 0.8rem;
}

/* Social Links in Top Bar */
.social-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--topbar-text);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover,
.social-link:focus-visible {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: translateY(-1px);
}

.social-link:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.social-link--vk:hover { background: #0077FF; }
.social-link--max:hover { background: #FF6B35; }
.social-link--yandex:hover { background: #FFCC00; color: #212121; }

.social-link img,
.social-link svg {
  width: 16px;
  height: 16px;
  display: block;
}

/* ============================================
   MAIN NAVBAR
   ============================================ */
.navbar-main {
  background: var(--navbar-bg);
  border-bottom: 1px solid var(--navbar-border);
  min-height: var(--navbar-height);
  transition: min-height var(--transition-normal);
}

.site-header.is-stuck .navbar-main {
  min-height: var(--navbar-height-sticky);
}

.navbar-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 100%;
  min-height: inherit;
  padding-block: 0.75rem;
}

/* Brand / Logo */
.navbar-brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.navbar-brand:hover {
  transform: scale(1.02);
}

.navbar-brand img {
  max-width: 150px;
  height: auto;
  display: block;
}

/* Desktop Navigation */
.navbar-nav--desktop {
  display: none;
  flex: 1;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--navbar-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--navbar-primary);
  background: rgba(9, 99, 158, 0.06);
}

.nav-link:focus-visible {
  outline: 2px solid var(--navbar-primary);
  outline-offset: 2px;
}

.nav-link.active {
  color: var(--navbar-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--navbar-primary);
  border-radius: var(--radius-full);
}

/* Navbar Actions (Phone + Toggle) */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Phone CTA */
.navbar-phone {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--navbar-primary), var(--navbar-primary-dark));
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px rgba(9, 99, 158, 0.25);
}

.navbar-phone:hover,
.navbar-phone:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(9, 99, 158, 0.35);
  color: #fff;
}

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

.navbar-phone__content {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.navbar-phone__label {
  font-size: 0.7rem;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.navbar-phone__number {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.navbar-phone__rating {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}

.navbar-phone__rating svg {
  color: #ffc107;
}

/* ============================================
   MOBILE TOGGLE BUTTON
   ============================================ */
.navbar-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.navbar-toggle:hover,
.navbar-toggle:focus-visible {
  background: rgba(9, 99, 158, 0.06);
}

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

.navbar-toggle__box {
  position: relative;
  width: 24px;
  height: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.navbar-toggle__line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--navbar-text);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  transform-origin: center;
}

/* Animated state (when menu is open) */
.navbar-toggle[aria-expanded="true"] .navbar-toggle__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

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

/* ============================================
   MOBILE DRAWER
   ============================================ */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  visibility: hidden;
  pointer-events: none;
}

.mobile-drawer.is-open {
  visibility: visible;
  pointer-events: auto;
}

/* Overlay */
.mobile-drawer__overlay {
  position: absolute;
  inset: 0;
  background: var(--navbar-overlay);
  opacity: 0;
  transition: opacity var(--transition-normal);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mobile-drawer.is-open .mobile-drawer__overlay {
  opacity: 1;
}

/* Content Panel */
.mobile-drawer__content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 380px);
  background: var(--navbar-bg);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.mobile-drawer.is-open .mobile-drawer__content {
  transform: translateX(0);
}

/* Header */
.mobile-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--navbar-border);
  flex-shrink: 0;
}

.mobile-drawer__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navbar-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mobile-drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--navbar-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-drawer__close:hover,
.mobile-drawer__close:focus-visible {
  background: rgba(9, 99, 158, 0.06);
  color: var(--navbar-primary);
}

.mobile-drawer__close:focus-visible {
  outline: 2px solid var(--navbar-primary);
  outline-offset: 2px;
}

/* Navigation */
.mobile-drawer__nav {
  padding: 1rem 0;
  flex-shrink: 0;
}

.mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--navbar-text);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.mobile-nav-link:hover,
.mobile-nav-link:focus-visible {
  background: rgba(9, 99, 158, 0.04);
  color: var(--navbar-primary);
  border-left-color: var(--navbar-primary);
}

.mobile-nav-link:focus-visible {
  outline: 2px solid var(--navbar-primary);
  outline-offset: -2px;
}

.mobile-nav-link.active {
  color: var(--navbar-primary);
  font-weight: 600;
  background: rgba(9, 99, 158, 0.06);
  border-left-color: var(--navbar-primary);
}

/* Contacts Section */
.mobile-drawer__contacts {
  padding: 1.5rem;
  border-top: 1px solid var(--navbar-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: auto;
}

.mobile-cta-phone {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: linear-gradient(135deg, var(--navbar-primary), var(--navbar-primary-dark));
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px rgba(9, 99, 158, 0.25);
}

.mobile-cta-phone:hover,
.mobile-cta-phone:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(9, 99, 158, 0.35);
  color: #fff;
}

.mobile-cta-phone svg {
  flex-shrink: 0;
}

.mobile-cta-phone__label {
  display: block;
  font-size: 0.75rem;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mobile-cta-phone__number {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
}

.mobile-drawer__address,
.mobile-drawer__hours {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--navbar-text-muted);
  line-height: 1.5;
}

.mobile-drawer__address svg,
.mobile-drawer__hours svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--navbar-primary);
}

/* Social in Drawer */
.mobile-drawer__social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--navbar-border);
}

.mobile-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(9, 99, 158, 0.06);
  color: var(--navbar-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.mobile-social-link:hover,
.mobile-social-link:focus-visible {
  background: var(--navbar-primary);
  color: #fff;
  transform: translateY(-2px);
}

.mobile-social-link:focus-visible {
  outline: 2px solid var(--navbar-primary);
  outline-offset: 2px;
}

.mobile-social-link img,
.mobile-social-link svg {
  width: 22px;
  height: 22px;
  display: block;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile: Hide top bar, show toggle */
@media (max-width: 991.98px) {
  .top-bar {
    display: none;
  }
  
  .navbar-phone {
    display: none !important;
  }
  
  .navbar-toggle {
    display: inline-flex;
  }
}

/* Tablet & Desktop: Show desktop nav, hide toggle */
@media (min-width: 992px) {
  .navbar-nav--desktop {
    display: flex;
  }
  
  .navbar-phone {
    display: inline-flex;
  }
  
  .navbar-toggle {
    display: none;
  }
  
  /* Hide mobile drawer on desktop */
  .mobile-drawer {
    display: none;
  }
}

/* Large Desktop: Bigger spacing */
@media (min-width: 1200px) {
  :root {
    --container-padding: 1.5rem;
  }
  
  .nav-link {
    padding: 0.6rem 1.25rem;
    font-size: 1rem;
  }
  
  .navbar-phone__label {
    display: block;
  }
}

/* Small Mobile: Adjust drawer */
@media (max-width: 359.98px) {
  .mobile-drawer__content {
    width: 100vw;
  }
}

/* ============================================
   ACCESSIBILITY: Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  .mobile-drawer__content {
    transition: none;
  }
  
  .mobile-drawer__overlay {
    transition: none;
  }
}

/* ============================================
   ACCESSIBILITY: High Contrast
   ============================================ */
@media (prefers-contrast: more) {
  .nav-link:focus-visible,
  .mobile-nav-link:focus-visible {
    outline-width: 3px;
  }
  
  .navbar-phone {
    border: 2px solid #fff;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .site-header,
  .mobile-drawer,
  .skip-link {
    display: none !important;
  }
}