/**
 * TATEXPO — Header, Navigation, Modals & Mobile Design System
 * Official Tatexpo Brand Guidelines (2024-2026)
 */

/* ==========================================================================
   1. SITE HEADER & 2-LEVEL DROPDOWN NAVIGATION
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height, 80px);
  background: var(--header-bg, rgba(6, 21, 43, 0.92));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color, rgba(137, 182, 226, 0.18));
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header.is-scrolled {
  height: 68px;
  background: var(--header-bg-scrolled, rgba(6, 21, 43, 0.98));
  box-shadow: 0 8px 30px rgba(4, 14, 30, 0.6);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.site-header__logo-image {
  height: 38px;
  width: auto;
  max-height: 42px;
  display: block;
  object-fit: contain;
  transition: transform 0.25s ease;
}

.site-header__logo:hover .site-header__logo-image {
  transform: scale(1.03);
}

/* Desktop Navigation Links & Dropdowns */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link-item,
.nav-dropdown-toggle {
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  position: relative;
  transition: all 0.2s ease;
  white-space: nowrap;
  background: transparent;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-link-item::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--brand-light, #89B6E2);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link-item:hover,
.nav-dropdown-toggle:hover {
  color: #89B6E2;
  background: rgba(9, 102, 162, 0.15);
}

.nav-link-item:hover::after {
  transform: scaleX(1);
}

.nav-item-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-arrow {
  font-size: 10px;
  transition: transform 0.25s ease;
  color: #89B6E2;
}

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

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: #092244;
  border: 1px solid rgba(137, 182, 226, 0.25);
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 16px 36px rgba(4, 14, 30, 0.8);
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 1010;
}

.nav-item-dropdown:hover .nav-dropdown-menu,
.nav-item-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
  pointer-events: auto;
}

.nav-dropdown-menu a,
.nav-dropdown-menu button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-size: 13px;
  color: #E2ECF7;
  text-decoration: none;
  border-radius: 6px;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
}

.nav-dropdown-menu a i,
.nav-dropdown-menu button i {
  font-size: 13px;
  color: #89B6E2;
  width: 16px;
  text-align: center;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu button:hover {
  color: #FFFFFF;
  background: rgba(9, 102, 162, 0.35);
  transform: translateX(4px);
}

.nav-dropdown-menu a:hover i,
.nav-dropdown-menu button:hover i {
  color: #FFFFFF;
}

/* Actions: Telegram & MAX Pulse Badges + CTA + Burger */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-socials-pulsing {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pulse-social {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(9, 60, 109, 0.7);
  border: 1px solid rgba(137, 182, 226, 0.3);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 16px;
  transition: all 0.25s ease;
}

.pulse-social--tg:hover {
  background: #0966A2;
  border-color: #89B6E2;
  color: #FFFFFF;
  transform: scale(1.06);
}

.pulse-social--max {
  border-radius: 8px;
  width: auto;
  padding: 0 10px;
  height: 38px;
}

.max-badge-text {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #89B6E2;
}

.pulse-social--max:hover {
  background: #0966A2;
  border-color: #89B6E2;
}

.pulse-social--max:hover .max-badge-text {
  color: #FFFFFF;
}

.pulse-ring {
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  border: 1.5px solid rgba(9, 102, 162, 0.6);
  animation: pulseGlow 2.4s infinite ease-out;
  pointer-events: none;
}

@keyframes pulseGlow {
  0% { transform: scale(0.95); opacity: 0.9; }
  70% { transform: scale(1.35); opacity: 0; }
  100% { transform: scale(1.35); opacity: 0; }
}

.header-cta-btn {
  padding: 10px 18px;
  font-size: 12px;
}

/* Mobile Burger Trigger Button */
.mobile-menu-trigger {
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(9, 60, 109, 0.6);
  border: 1px solid rgba(137, 182, 226, 0.3);
  border-radius: 8px;
  cursor: pointer;
  padding: 8px 10px;
  min-width: 42px;
  min-height: 42px;
  transition: all 0.2s ease;
}

.mobile-menu-trigger:hover,
.mobile-menu-trigger:active {
  background: #0966A2;
  border-color: #89B6E2;
}

.mobile-menu-trigger__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.mobile-menu-trigger__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: #FFFFFF;
  border-radius: 2px;
  transition: all 0.25s ease;
}

/* ==========================================================================
   2. PREMIUM 2-LEVEL FULLSCREEN MOBILE NAVIGATION PANEL
   ========================================================================== */
.mobile-nav-panel {
  position: fixed;
  inset: 0;
  background: #06152B;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(9, 102, 162, 0.35) 0%, transparent 50%),
    radial-gradient(circle at 90% 90%, rgba(9, 60, 109, 0.45) 0%, transparent 60%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateX(100%);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-overflow-scrolling: touch;
}

.mobile-nav-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(137, 182, 226, 0.15);
  background: rgba(6, 21, 43, 0.92);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.mobile-nav-close {
  background: rgba(9, 60, 109, 0.6);
  border: 1px solid rgba(137, 182, 226, 0.3);
  color: #FFFFFF;
  font-size: 16px;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.mobile-nav-close:hover,
.mobile-nav-close:active {
  background: #0966A2;
  border-color: #89B6E2;
}

.mobile-nav-body {
  padding: 20px 20px 80px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav-group-title {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 700;
  color: #89B6E2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.mobile-nav-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(9, 34, 68, 0.45);
  border: 1px solid rgba(137, 182, 226, 0.12);
  border-radius: 8px;
  color: #FFFFFF;
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.mobile-nav-link i {
  color: #89B6E2;
  font-size: 15px;
  width: 20px;
  text-align: center;
}

.mobile-nav-link:hover,
.mobile-nav-link:active {
  background: rgba(9, 102, 162, 0.3);
  border-color: rgba(137, 182, 226, 0.35);
  color: #89B6E2;
  transform: translateX(4px);
}

.mobile-nav-cta {
  padding-top: 4px;
}

.mobile-nav-contacts {
  padding-top: 14px;
  border-top: 1px solid rgba(137, 182, 226, 0.15);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #E2ECF7;
  text-decoration: none;
  padding: 4px 0;
}

.mobile-contact-item i {
  color: #89B6E2;
  font-size: 14px;
  width: 18px;
  text-align: center;
}

.mobile-contact-item:hover {
  color: #89B6E2;
}

.mobile-contact-item--address {
  font-size: 12.5px;
  color: #A0BBD8;
}

.mobile-nav-socials {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.mobile-social-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(9, 60, 109, 0.5);
  border: 1px solid rgba(137, 182, 226, 0.25);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.mobile-social-badge:hover,
.mobile-social-badge:active {
  background: #0966A2;
  border-color: #89B6E2;
}

/* ==========================================================================
   3. MODAL APPLICATION DIALOG
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 14, 30, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  background: #092244;
  border: 1px solid rgba(137, 182, 226, 0.3);
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: 0 24px 60px rgba(4, 14, 30, 0.8);
  transform: translateY(20px) scale(0.96);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.is-open .modal-container {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(9, 60, 109, 0.6);
  border: 1px solid rgba(137, 182, 226, 0.25);
  color: #FFFFFF;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.modal-close-btn:hover {
  background: #0966A2;
  border-color: #89B6E2;
}

.contact-form-title {
  font-size: 22px;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.contact-form-subtitle {
  font-size: 13.5px;
  color: #89B6E2;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #89B6E2;
  margin-bottom: 6px;
}

.form-input,
.form-textarea {
  width: 100%;
  background: rgba(6, 21, 43, 0.7);
  border: 1px solid rgba(137, 182, 226, 0.25);
  border-radius: 8px;
  padding: 11px 14px;
  color: #FFFFFF;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: #0966A2;
  box-shadow: 0 0 0 3px rgba(9, 102, 162, 0.3);
}

.form-textarea {
  min-height: 75px;
  resize: vertical;
}

.form-success-message {
  display: none;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid #10B981;
  color: #E2ECF7;
  padding: 12px;
  border-radius: 8px;
  margin-top: 16px;
  font-size: 13px;
  text-align: center;
}

/* ==========================================================================
   4. SITE FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--footer-bg, #040E1E);
  border-top: 1px solid var(--border-color, rgba(137, 182, 226, 0.18));
  padding: 72px 0 36px;
  position: relative;
  z-index: 10;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1.1fr 1.1fr 1.4fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand img,
.footer-brand-logo {
  height: 40px;
  width: auto;
  max-width: 100%;
  display: block;
  margin-bottom: 18px;
  object-fit: contain;
  transition: transform 0.25s ease;
}

.footer-brand img:hover,
.footer-brand-logo:hover {
  transform: scale(1.03);
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted, #6B94BD);
  margin: 0;
  max-width: 340px;
  line-height: 1.65;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #FFFFFF;
  margin-bottom: 22px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary, #89B6E2);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
  width: fit-content;
}

.footer-links a:hover {
  color: #FFFFFF;
  transform: translateX(4px);
}

.footer-contacts-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact-item {
  font-size: 14px;
  color: var(--text-secondary, #89B6E2);
  line-height: 1.5;
}

.footer-contact-item a {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.footer-contact-item a:hover {
  color: var(--text-secondary, #89B6E2);
}

.footer-bottom {
  border-top: 1px solid var(--border-color, rgba(137, 182, 226, 0.18));
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted, #6B94BD);
}

.footer-legal {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-legal a {
  color: var(--text-muted, #6B94BD);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-legal a:hover {
  color: var(--text-secondary, #89B6E2);
}

/* ==========================================================================
   5. FIXED MOBILE BOTTOM NAVIGATION BAR
   ========================================================================== */
.mobile-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(6, 21, 43, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(137, 182, 226, 0.2);
    z-index: 999;
    align-items: center;
    justify-content: space-around;
    padding: 0 4px max(4px, env(safe-area-inset-bottom));
  }

  .mobile-bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    font-size: 9.5px;
    font-weight: 600;
    color: #89B6E2;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 6px 8px;
    border-radius: 6px;
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
  }

  .mobile-bottom-nav a i {
    font-size: 16px;
  }

  .mobile-bottom-nav a.is-active,
  .mobile-bottom-nav a:hover {
    color: #FFFFFF;
    text-shadow: 0 0 10px rgba(9, 102, 162, 0.8);
  }

  body {
    padding-bottom: 64px;
  }
}

/* ==========================================================================
   6. RESPONSIVE BREAKPOINTS (Desktop -> Tablet -> Mobile)
   ========================================================================== */
@media (max-width: 1080px) {
  .site-header__nav {
    display: none;
  }
  .mobile-menu-trigger {
    display: inline-flex;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 64px !important;
  }
  .site-header__logo-image {
    height: 32px !important;
  }
  .header-cta-btn {
    display: none !important;
  }
  .section {
    padding: 60px 0;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
  .footer-legal {
    flex-direction: column;
    gap: 8px;
  }
}


/* ==========================================================================
   MOBILE FOOTER OPTIMIZATION (COMPACT & CLEAN)
   ========================================================================== */
@media (max-width: 768px) {
  .site-footer {
    padding: 40px 0 24px !important;
  }

  .footer-top-grid {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
    margin-bottom: 28px !important;
  }

  .footer-brand p {
    margin-top: 10px !important;
    margin-bottom: 0 !important;
    font-size: 13.5px !important;
    line-height: 1.5 !important;
  }

  .footer-col-title {
    margin-bottom: 10px !important;
    font-size: 12px !important;
    letter-spacing: 0.08em !important;
  }

  .footer-links {
    gap: 6px !important;
  }

  .footer-links a {
    font-size: 13.5px !important;
    padding: 3px 0 !important;
    margin-bottom: 0 !important;
    line-height: 1.4 !important;
  }

  .footer-contacts-list {
    gap: 6px !important;
  }

  .footer-contact-item,
  .footer-contact-address {
    font-size: 13.5px !important;
    line-height: 1.4 !important;
  }

  .footer-bottom {
    padding-top: 20px !important;
    font-size: 12px !important;
    gap: 12px !important;
  }

  .footer-legal {
    gap: 14px !important;
  }
}