body {
      font-family: 'Inter', sans-serif;
    }
    /* Custom Scrollbar for dynamic results */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: rgba(241, 245, 249, 1);
    }
    ::-webkit-scrollbar-thumb {
      background: rgba(203, 213, 225, 1);
      border-radius: 3px;
    }
    /* Dynamic Background Transitions */
    .fade-slide {
      transition: opacity 1.5s ease-in-out;
    }
    .custom-shadow {
      box-shadow: 0 20px 50px -12px rgba(15, 23, 42, 0.2);
    }
    .glassmorphism {
      background: rgba(255, 255, 255, 0.90);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
    }
    /* Consistent Height Utility */
    .input-height {
      height: 3rem; /* 48px exact match across all input elements */
    }

    /* Sticky Header + Mobile Menu */
    :root {
      --vista-blue: #063b73;
      --vista-blue-dark: #042f5f;
    }
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 50;
      transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
    }
    .site-header .top-bar {
      background: rgba(4, 47, 95, 0.96);
    }
    .site-header.header-scrolled {
      background: rgba(4, 47, 95, 0.97);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      box-shadow: 0 14px 36px rgba(2, 6, 23, 0.24);
      border-bottom: 1px solid rgba(255, 255, 255, 0.10);
    }
    .site-header.header-scrolled nav {
      padding-top: 0.85rem;
      padding-bottom: 0.85rem;
    }
    .mobile-menu-panel {
      max-height: 0;
      opacity: 0;
      transform: translateY(-8px);
      pointer-events: none;
      overflow: hidden;
      transition: max-height 0.35s ease, opacity 0.25s ease, transform 0.25s ease;
    }
    .mobile-menu-panel.open {
      max-height: calc(100vh - 72px);
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
      overflow-y: auto;
    }
    body.mobile-menu-open {
      overflow: hidden;
    }
    @media (max-width: 1023px) {
      .site-header {
        background: rgba(4, 47, 95, 0.97);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        box-shadow: 0 12px 30px rgba(2, 6, 23, 0.22);
      }
    }


    /* Responsive hardening fixes */
    .header-brand-title {
      font-size: clamp(0.95rem, 4.2vw, 1.5rem);
      max-width: min(58vw, 360px);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      line-height: 1.1;
    }
    .nav-call-btn {
      display: none;
    }
    .search-cta-icon,
    .action-icon-sm {
      width: 1rem;
      height: 1rem;
      min-width: 1rem;
      min-height: 1rem;
      flex-shrink: 0;
    }
    @media (min-width: 420px) {
      .nav-call-btn {
        display: flex;
      }
    }
    @media (min-width: 1024px) {
      .nav-call-btn {
        display: flex;
      }
      .header-brand-title {
        max-width: none;
      }
    }
    @media (max-width: 767px) {
      .site-header nav {
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
      }
      .hero-section {
        min-height: auto;
        padding-top: 8.75rem;
        padding-bottom: 3.5rem;
      }
      .booking-card {
        border-radius: 1.25rem;
        padding: 1rem;
      }
      .trip-tabs {
        overflow-x: auto;
        scrollbar-width: none;
      }
      .trip-tabs::-webkit-scrollbar {
        display: none;
      }
      .trip-tab {
        min-width: max-content;
      }
      .mobile-menu-panel.open {
        max-height: calc(100vh - 64px);
      }
    }
    @media (min-width: 768px) and (max-width: 1023px) {
      .hero-section {
        padding-top: 9rem;
      }
      .booking-card {
        padding: 1.25rem;
      }
    }