/* =========================================
   DESIGN SYSTEM — CSS Custom Properties
   ========================================= */
:root {
  /* Primary Brand Colors (HSL) */
  --color-primary: 216, 45%, 35%;          /* #21549b - Deep Navy */
  --color-primary-light: 216, 45%, 45%;    /* lighter navy */
  --color-primary-dark: 216, 45%, 25%;     /* darker navy */
  --color-accent: 189, 72%, 65%;           /* #63cee8 - Cyan Accent */
  --color-accent-light: 189, 72%, 75%;     /* lighter cyan */
  --color-accent-dark: 189, 72%, 50%;      /* darker cyan */

  /* Neutral Palette */
  --color-white: 0, 0%, 100%;
  --color-gray-50: 0, 0%, 98%;
  --color-gray-100: 0, 0%, 96%;
  --color-gray-200: 0, 0%, 89%;
  --color-gray-300: 0, 0%, 80%;
  --color-gray-500: 0, 0%, 60%;
  --color-gray-700: 0, 0%, 33%;
  --color-gray-900: 0, 0%, 13%;

  /* Spacing Scale (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-9: 48px;
  --space-10: 56px;
  --space-11: 64px;
  --space-12: 80px;
  --space-13: 96px;
  --space-14: 120px;

  /* Typography Scale */
  --font-xs: 0.75rem;     /* 12px */
  --font-sm: 0.875rem;    /* 14px */
  --font-base: 1rem;      /* 16px */
  --font-lg: 1.125rem;    /* 18px */
  --font-xl: 1.25rem;     /* 20px */
  --font-2xl: 1.5rem;     /* 24px */
  --font-3xl: 1.875rem;   /* 30px */
  --font-4xl: 2.25rem;    /* 36px */
  --font-5xl: 2.875rem;   /* 46px */
  --font-display: 5.375rem; /* 86px */

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 30px hsl(var(--color-accent) / 0.3);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.12);

  /* Gradients */
  --gradient-hero-top: linear-gradient(180deg, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.1) 50%, transparent 100%);
  --gradient-hero-bottom: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.55) 60%, rgba(0, 0, 0, 0.7) 100%);
  --gradient-card-overlay: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.65) 100%);
  --gradient-faq: linear-gradient(165deg, hsl(var(--color-primary)) 0%, hsl(var(--color-accent)) 100%);
  --gradient-footer: linear-gradient(180deg, hsl(var(--color-primary)) 0%, hsl(var(--color-primary-dark)) 100%);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-normal: 0.35s var(--ease-out);
  --transition-slow: 0.5s var(--ease-out);
  --transition-spring: 0.4s var(--ease-spring);
}

/* =========================================
   SCROLL ANIMATIONS — Fade In on Scroll
   ========================================= */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 hsl(var(--color-accent) / 0.4); }
  50% { box-shadow: 0 0 20px 5px hsl(var(--color-accent) / 0.2); }
}

/* Scroll reveal base class */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* =========================================
   ENHANCED VISUAL QUALITY
   ========================================= */

/* Smooth page rendering */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header enhanced gradients */
.header .opacity-layer {
  background: var(--gradient-hero-top);
  height: 320px;
}

.header .opacity-layer-2 {
  background: var(--gradient-hero-bottom);
  height: 450px;
}

/* Navigation glassmorphism effect on scroll */
.nav.scrolled {
  background: rgba(33, 84, 155, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 0;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: all var(--transition-normal);
}

/* Hero title enhanced typography */
.hero-title {
  font-weight: 700;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

/* Hero button micro-interactions */
.hero-button {
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.hero-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero-button:active {
  transform: translateY(0);
}

/* Carousel slide active glow */
.carousel-slide.active {
  border-color: #fff;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.carousel-slide {
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.carousel-slide:hover {
  transform: scale(1.03);
}

/* Carousel nav buttons enhanced */
.carousel-prev, .carousel-next {
  transition: all var(--transition-spring);
}

.carousel-prev:hover, .carousel-next:hover {
  transform: scale(1.1);
}

/* =========================================
   SECTION TITLES — Better Typography
   ========================================= */
.section-title {
  letter-spacing: -0.01em;
  position: relative;
}

.section-title > a {
  gap: 8px;
}

.section-title > a:hover {
  color: hsl(var(--color-accent-dark));
}

.section-title > a .icon.jump {
  transition: transform var(--transition-normal);
}

.section-title > a:hover .icon.jump {
  transform: rotate(-45deg) translate(3px, -3px);
}

/* =========================================
   EXPERIENCE CARDS — Enhanced Effects
   ========================================= */
.experience-card-top {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.experience-card-top:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.experience-card-top .card-image::after {
  background: var(--gradient-card-overlay);
  opacity: 0.6;
}

.experience-card-top:hover .card-image::after {
  opacity: 0.75;
}

.experience-card-top .card-content .card-button {
  transition: all var(--transition-spring);
}

.experience-card-top:hover .card-content .card-button {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Experience grid cards */
.experience-card {
  border-radius: var(--radius-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.experience-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.experience-card .card-image {
  border-radius: var(--radius-md);
}

/* Scroll buttons enhanced */
.experience-top-btn, .destinations-top-btn {
  transition: all var(--transition-spring);
  box-shadow: var(--shadow-sm);
}

.experience-top-btn:hover, .destinations-top-btn:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-md);
}

/* =========================================
   SNAPSHOTS — Hover Effects
   ========================================= */
.Snapshots-con-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.Snapshots-con-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.Snapshots-con-item img {
  transition: transform var(--transition-slow);
}

.Snapshots-con-item:hover img {
  transform: scale(1.05);
}

/* =========================================
   DESTINATION CARDS — Premium Look
   ========================================= */
.destination-card {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.destination-card:hover {
  box-shadow: var(--shadow-xl);
}

.destination-card .card-image::after {
  background: var(--gradient-card-overlay);
  opacity: 0.5;
}

.destination-card:hover .card-image::after {
  opacity: 0.7;
}

/* Destination pair text cards */
.destination-text-card {
  transition: all var(--transition-normal);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.destination-pair:hover .destination-text-card {
  background-color: hsl(var(--color-gray-50));
  border-color: hsl(var(--color-accent) / 0.3);
  box-shadow: var(--shadow-sm);
}

.destination-image-card {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

/* =========================================
   MID BANNER — Cinematic Feel
   ========================================= */
.mid-banner {
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.2);
}

.mid-banner-slide .banner-content {
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.banner-title {
  letter-spacing: -0.01em;
}

.banner-content .card-button {
  transition: all var(--transition-spring);
}

.banner-content .card-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.mid-banner-dot {
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.mid-banner-dot:hover {
  transform: scale(1.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.mid-banner-dot.active {
  transform: scale(1.2);
  border-color: hsl(var(--color-accent));
}

/* =========================================
   POPMART/SHOPPING — Card Quality
   ========================================= */
.popmart {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.popmart:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.popmart .card-content .card-button {
  transition: all var(--transition-spring);
}

.popmart:hover .card-content .card-button {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* =========================================
   PLAN YOUR VISIT — Grid Polish
   ========================================= */
.plan-card {
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.plan-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0;
  background: linear-gradient(180deg, hsl(var(--color-primary) / 0.05) 0%, transparent 100%);
  transition: height var(--transition-normal);
}

.plan-card:hover::before {
  height: 100%;
}

.plan-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-bottom: 6px solid hsl(var(--color-primary));
}

.plan-icon {
  transition: transform var(--transition-spring);
}

.plan-card:hover .plan-icon {
  transform: scale(1.1) translateY(-3px);
}

/* =========================================
   FAQ SECTION — Gradient Enhancement
   ========================================= */
.qa-section {
  background: var(--gradient-faq);
  position: relative;
}

.qa-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 20%, hsl(var(--color-accent) / 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.qa-card {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  box-shadow: var(--shadow-card);
}

.qa-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.qa-q, .qa-a {
  line-height: 1;
}

/* AI Chat card styling */
.qa-card.qa-card-ai {
  border: 1px solid hsl(var(--color-accent) / 0.2);
  box-shadow: var(--shadow-card), 0 0 0 1px hsl(var(--color-accent) / 0.1);
}

.qa-input-bottom {
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  background: linear-gradient(135deg, hsl(var(--color-primary)) 0%, hsl(var(--color-primary-dark)) 100%);
}

.qa-input-field {
  transition: box-shadow var(--transition-fast);
}

.qa-input-field:focus {
  box-shadow: 0 0 0 3px hsl(var(--color-accent) / 0.3);
}

/* =========================================
   FOOTER — Gradient & Polish
   ========================================= */
.footer {
  background: var(--gradient-footer);
}

.footer .to-top {
  transition: transform var(--transition-spring);
}

.footer .to-top:hover {
  transform: translate(100px, -50px) scale(1.1) translateY(-3px);
}

@media (max-width: 1500px) {
  .footer .to-top:hover {
    transform: translate(-10px, -50px) scale(1.1) translateY(-3px);
  }
}

.social-link {
  transition: transform var(--transition-spring), box-shadow var(--transition-normal);
  border-radius: var(--radius-full);
}

.social-link:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-glow);
}

.footer-links a {
  position: relative;
  padding-bottom: 2px;
}

.footer-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: hsl(var(--color-accent));
  transition: width var(--transition-normal);
}

.footer-links a:hover::after {
  width: 100%;
}

/* =========================================
   PAGE LOADING ANIMATION
   ========================================= */
body {
  animation: fadeInScale 0.6s var(--ease-out);
}

/* =========================================
   MOBILE ENHANCEMENTS
   ========================================= */
@media screen and (max-width: 767px) {
  /* Smoother mobile menu transitions */
  .mobile-menu-overlay {
    transition: opacity 0.3s var(--ease-out);
    opacity: 0;
    pointer-events: none;
  }

  .mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: all;
  }

  .mobile-menu {
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
  }

  .mobile-menu-overlay.active .mobile-menu {
    transform: translateX(0);
  }

  /* Mobile search overlay animation */
  .mobile-search-overlay {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease-out);
  }

  .mobile-search-overlay.active {
    opacity: 1;
    pointer-events: all;
  }

  .mobile-search-box {
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.4s var(--ease-out) 0.1s;
  }

  .mobile-search-overlay.active .mobile-search-box {
    transform: translateY(0);
    opacity: 1;
  }

  /* Touch-friendly tap targets */
  .mobile-menu-item-header {
    min-height: 56px;
  }

  .mobile-nav-icons img {
    padding: 8px;
    border-radius: var(--radius-full);
    transition: background-color 0.2s;
  }

  .mobile-nav-icons img:active {
    background-color: rgba(0, 0, 0, 0.05);
  }

  /* Mobile card improvements */
  .experience-card-top,
  .destination-card,
  .popmart {
    border-radius: var(--radius-md);
  }

  /* Better mobile carousel indicators */
  .mobile-carousel-indicators .indicator {
    width: 10px;
    height: 10px;
    transition: all var(--transition-normal);
  }

  .mobile-carousel-indicators .indicator.active {
    width: 24px;
    border-radius: var(--radius-full);
  }

  /* Plan cards mobile touch */
  .plan-card:active {
    transform: scale(0.97);
  }

  /* Smoother scrolling for mobile */
  .experience-top-scroll-wrapper,
  .destinations-top-scroll-wrapper {
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
  }

  .experience-card-top,
  .destination-card {
    scroll-snap-align: start;
  }
}

/* =========================================
   ACCESSIBILITY & REDUCED MOTION
   ========================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* =========================================
   LOADING SKELETON (Optional Enhancement)
   ========================================= */
.skeleton {
  background: linear-gradient(90deg, hsl(var(--color-gray-100)) 25%, hsl(var(--color-gray-200)) 50%, hsl(var(--color-gray-100)) 75%);
  background-size: 400% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* =========================================
   PAGE TRANSITIONS — View Transitions API
   =========================================
   Cross-document view transitions (Chrome 126+, Safari 18.2+).
   Unsupported browsers ignore these rules gracefully and keep the
   existing body fade-in as a fallback. */

@view-transition {
  navigation: auto;
}

/* Old page exits briskly so the new page can take over without a long
   waiting period in between. */
::view-transition-old(root) {
  animation: pageOut 0.35s var(--ease-out);
  animation-delay: 0s;
}

/* New page enters smoothly with a subtle upward drift; the slight delay
   lets the old page clear first, avoiding a harsh crossfade flash. */
::view-transition-new(root) {
  animation: pageIn 0.6s var(--ease-out);
}

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

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* In supporting browsers, disable the body page-load animation so it does
   not double up with the view-transition new-root animation. */
@supports (view-transition-name: root) {
  body {
    animation: none;
  }
}

/* During a cross-document view transition, first-screen reveal elements are
   shown at their final state so the page snapshot is complete, and their own
   transition is disabled so no per-element animation stacks on top of the
   root transition. Elements below the fold keep their scroll-reveal state. */
body.vt-active .reveal.visible {
  transition: none;
}

/* Reduced motion: skip page transitions entirely. */
@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none !important;
  }
}