/**
 * DESTINATION HILL TRAVEL & TOURISM PVT. LTD.
 * Master Stylesheet — Luxury Editorial & 3D Travel Experience
 * Combining Black Tomato luxury, Audley structured planning, and Intrepid authentic adventure.
 */

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-navy-deep);
  color: var(--color-text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

/* ==========================================================================
   Typography & Hierarchy
   ========================================================================== */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.heading-display {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.heading-xl {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
}

.heading-lg {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  font-weight: 600;
  line-height: 1.25;
}

.heading-md {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 600;
}

.heading-sm {
  font-size: 1.15rem;
  font-weight: 600;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-turquoise);
  margin-bottom: 12px;
}

.section-label.gold {
  color: var(--color-gold);
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 2px;
  background-color: currentColor;
}

/* ==========================================================================
   Layout Containers & Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-wide {
  max-width: var(--container-wide);
}

.section-space {
  padding-top: 100px;
  padding-bottom: 100px;
}

.section-space-sm {
  padding-top: 60px;
  padding-bottom: 60px;
}

.bg-navy {
  background-color: var(--color-navy-deep);
  color: var(--color-white);
}

.bg-midnight {
  background-color: var(--color-navy-midnight);
  color: var(--color-white);
}

.bg-soft-grey {
  background-color: var(--color-soft-grey);
  color: var(--color-text-dark);
}

.bg-white {
  background-color: var(--color-white);
  color: var(--color-text-dark);
}

.text-center { text-align: center; }
.text-gold { color: var(--color-gold); }
.text-turquoise { color: var(--color-turquoise); }
.text-orange { color: var(--color-orange); }
.text-white { color: var(--color-white); }
.text-muted { color: var(--color-text-muted); }
.text-light-muted { color: var(--color-text-light-muted); }

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.transparent {
  background: linear-gradient(180deg, rgba(7, 27, 51, 0.95) 0%, rgba(7, 27, 51, 0.4) 70%, transparent 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header.scrolled {
  background-color: rgba(7, 27, 51, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(8, 189, 208, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.header-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* Brand Logo Box with Protected Contrast */
.brand-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(8, 189, 208, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo-box:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(8, 189, 208, 0.35);
}

.brand-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-white);
  padding: 6px 4px;
  position: relative;
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: var(--color-turquoise);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-gold);
  border-radius: 2px;
}

/* Navigation Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-whatsapp-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: rgba(8, 189, 208, 0.15);
  border: 1px solid rgba(8, 189, 208, 0.35);
  color: #25D366;
  border-radius: 50%;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.nav-whatsapp-link:hover {
  background: #25D366;
  color: #FFFFFF;
  transform: scale(1.08);
  box-shadow: 0 4px 18px rgba(37, 211, 102, 0.4);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 32px;
  height: 22px;
  padding: 0;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Full-Screen 3D Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(circle at 65% 50%, #0B2545 0%, #071B33 60%, #051324 100%);
  padding-top: calc(var(--nav-height) + 20px);
  padding-bottom: 60px;
}

#hero-globe-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: auto;
}

.hero-overlay-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(7, 27, 51, 0.92) 0%, rgba(7, 27, 51, 0.65) 45%, rgba(7, 27, 51, 0.15) 100%);
}

.hero-content {
  position: relative;
  z-index: 5;
  width: 100%;
  max-width: 720px;
  pointer-events: auto;
}

.hero-brand-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(8, 189, 208, 0.12);
  border: 1px solid rgba(8, 189, 208, 0.35);
  border-radius: var(--radius-full);
  color: var(--color-turquoise);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-headline {
  color: var(--color-white);
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-headline span {
  display: block;
  color: var(--color-gold);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  color: var(--color-text-light-muted);
  line-height: 1.7;
  margin-bottom: 36px;
  font-weight: 400;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 40px;
}

.hero-trust-metrics {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.trust-metric-item {
  display: flex;
  flex-direction: column;
}

.trust-metric-number {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--color-white);
}

.trust-metric-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-turquoise);
}

/* Optional Scroll to Explore Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-light-muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  pointer-events: none;
  animation: bounceGentle 2.2s infinite ease-in-out;
}

.scroll-indicator-mouse {
  width: 22px;
  height: 36px;
  border: 2px solid rgba(8, 189, 208, 0.5);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-indicator-wheel {
  width: 4px;
  height: 8px;
  background-color: var(--color-gold);
  border-radius: 2px;
  animation: wheelScroll 1.8s infinite;
}

@keyframes bounceGentle {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

@keyframes wheelScroll {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* Globe Interactive Preview Card */
#globe-interactive-card {
  position: absolute;
  right: 40px;
  bottom: 40px;
  z-index: 20;
  background: rgba(7, 27, 51, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-turquoise);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  max-width: 320px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

#globe-interactive-card.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.globe-card-flag {
  font-size: 2rem;
  margin-bottom: 8px;
  display: block;
}

.globe-card-title {
  color: var(--color-white);
  font-size: 1.35rem;
  margin-bottom: 4px;
}

.globe-card-country {
  color: var(--color-turquoise);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  display: block;
}

/* Tooltip for globe hover */
#globe-pin-tooltip {
  position: fixed;
  display: none;
  z-index: 1000;
  pointer-events: none;
  background: rgba(7, 27, 51, 0.95);
  border: 1px solid var(--color-turquoise);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  color: var(--color-white);
  font-size: 0.85rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  transform: translate(-50%, -100%);
  white-space: nowrap;
}

/* ==========================================================================
   Smart Travel Search Panel (Section 5.B)
   ========================================================================== */
.search-section {
  position: relative;
  z-index: 30;
  margin-top: -50px;
  padding-bottom: 60px;
}

.search-panel-box {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-subtle);
  overflow: hidden;
}

/* Tab Headers */
.search-tabs {
  display: flex;
  background: var(--color-navy-midnight);
  overflow-x: auto;
  border-bottom: 1px solid rgba(8, 189, 208, 0.2);
}

.search-tab-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 24px;
  color: var(--color-text-light-muted);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
}

.search-tab-btn:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.04);
}

.search-tab-btn.active {
  color: var(--color-gold);
  background: rgba(8, 189, 208, 0.1);
  border-bottom-color: var(--color-gold);
}

/* Form Container */
.search-form-body {
  padding: 32px 36px;
}

.search-fields-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  align-items: flex-end;
}

.search-input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.search-input-group label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-navy-deep);
}

.search-input-group select,
.search-input-group input {
  height: 52px;
  padding: 0 16px;
  border: 1.5px solid #CBD5E1;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--color-navy-deep);
  background-color: #F8FAFC;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input-group select:focus,
.search-input-group input:focus {
  border-color: var(--color-turquoise);
  background-color: var(--color-white);
  box-shadow: 0 0 0 4px rgba(8, 189, 208, 0.15);
}

/* Trip Type Radio Bar (for flights) */
.flight-trip-types {
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.trip-type-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-navy-deep);
  cursor: pointer;
}

.trip-type-label input[type="radio"] {
  accent-color: var(--color-turquoise);
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   Section Headers (Editorial Typography)
   ========================================================================== */
.section-header-wrap {
  margin-bottom: 50px;
}

.section-header-wrap.with-action {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.section-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 650px;
  margin-top: 12px;
}

/* ==========================================================================
   Editorial Cards & Grids
   ========================================================================== */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

.cards-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 26px;
}

/* ==========================================================================
   View Container Controller (SPA Switching)
   ========================================================================== */
.view-container {
  display: none;
  width: 100%;
  animation: fadeInView 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.view-container.active {
  display: block;
}

@keyframes fadeInView {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sub-Page Hero Banner */
.subpage-hero {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  background-color: var(--color-navy-deep);
  background-size: cover;
  background-position: center;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 60px;
  color: var(--color-white);
  overflow: hidden;
}

.subpage-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(7, 27, 51, 0.85) 0%, rgba(7, 27, 51, 0.95) 100%);
  z-index: 1;
}

.subpage-hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #041021;
  color: var(--color-white);
  padding-top: 80px;
  padding-bottom: 30px;
  border-top: 1px solid rgba(8, 189, 208, 0.2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col-about {
  padding-right: 20px;
}

.footer-logo-box {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.95);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.footer-about-text {
  color: var(--color-text-light-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.footer-social-icon:hover {
  background: var(--color-turquoise);
  color: var(--color-navy-deep);
  transform: translateY(-2px);
}

.footer-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background-color: var(--color-gold);
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: var(--color-text-light-muted);
  font-size: 0.92rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-turquoise);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--color-text-light-muted);
  font-size: 0.92rem;
}

.footer-contact-icon {
  color: var(--color-turquoise);
  flex-shrink: 0;
  font-size: 1.1rem;
  margin-top: 2px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
  color: var(--color-text-light-muted);
}

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

.footer-legal-links a:hover {
  color: var(--color-gold);
}