/* ==========================================================================
   CANGO CAVES OFFICIAL CONCEPTUAL PORTAL
   Engineered by Helioz Systems Proprietary Limited, Oudtshoorn
   British English Typography and Styling
   ========================================================================== */

:root {
  --color-cave-dark: #0f1217;
  --color-cave-surface: #171c24;
  --color-cave-card: #202733;
  --color-cave-border: #2e3849;
  --color-gold-primary: #d4af37;
  --color-gold-hover: #e5c158;
  --color-gold-soft: rgba(212, 175, 55, 0.15);
  --color-sandstone: #c8a27a;
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-text-dark: #0f172a;
  --color-danger: #ef4444;
  --color-success: #10b981;
  --font-serif: "Cinzel", "Playfair Display", Georgia, serif;
  --font-sans: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-elevated: 0 12px 40px rgba(0, 0, 0, 0.6);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-cave-dark);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Typography Standards */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-text-main);
}

p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

a {
  color: var(--color-gold-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-gold-hover);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Top Operational Alert Bar */
.operational-alert-bar {
  background: linear-gradient(90deg, #1e293b, #0f172a);
  border-bottom: 1px solid var(--color-gold-primary);
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  color: var(--color-gold-hover);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.alert-content {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0 auto;
}

.alert-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--color-success);
}

/* Header and Navigation */
.site-header {
  background-color: rgba(15, 18, 23, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-cave-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.brand-block {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: 0.08em;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--color-sandstone);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.8rem;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-main);
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-gold-primary);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold-primary), #b89326);
  color: var(--color-text-dark);
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-block;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-gold-hover), var(--color-gold-primary));
  color: var(--color-text-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-gold-primary);
  border: 1px solid var(--color-gold-primary);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-secondary:hover {
  background-color: var(--color-gold-soft);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 7rem 0 5rem 0;
  background: radial-gradient(circle at 50% 20%, #1e2633 0%, #0f1217 75%);
  border-bottom: 1px solid var(--color-cave-border);
  text-align: center;
}

.heritage-badge {
  display: inline-block;
  background-color: var(--color-gold-soft);
  color: var(--color-gold-primary);
  border: 1px solid rgba(212, 175, 55, 0.3);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-description {
  font-size: 1.2rem;
  max-width: 720px;
  margin: 0 auto 2.5rem auto;
  color: #cbd5e1;
}

/* Quick Availability Bar */
.availability-bar {
  background-color: var(--color-cave-surface);
  border: 1px solid var(--color-cave-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  max-width: 950px;
  margin: 0 auto;
  box-shadow: var(--shadow-elevated);
  display: grid;
  grid-template-columns: repeat(4, 1fr) auto;
  gap: 1rem;
  align-items: center;
  text-align: left;
}

.bar-field label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-sandstone);
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.bar-field select,
.bar-field input {
  width: 100%;
  background-color: var(--color-cave-card);
  border: 1px solid var(--color-cave-border);
  color: var(--color-text-main);
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  color: var(--color-gold-primary);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

/* Tours Grid */
.tours-section {
  padding: 6rem 0;
}

.tours-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.tour-card {
  background-color: var(--color-cave-surface);
  border: 1px solid var(--color-cave-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, border-color 0.25s;
}

.tour-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-gold-primary);
}

.tour-card-header {
  padding: 2rem 2rem 1.5rem 2rem;
  border-bottom: 1px solid var(--color-cave-border);
}

.tour-type-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.8rem;
}

.tag-standard {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-adventure {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.tour-title {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.tour-meta-row {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-sandstone);
  margin-top: 0.8rem;
}

.tour-body {
  padding: 2rem;
  flex-grow: 1;
}

.tour-features-list {
  list-style: none;
  margin-top: 1.2rem;
}

.tour-features-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.tour-features-list li::before {
  content: "•";
  color: var(--color-gold-primary);
  font-size: 1.4rem;
}

.tour-footer {
  padding: 1.5rem 2rem 2rem 2rem;
  border-top: 1px solid var(--color-cave-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.15);
}

.tour-price-block .price-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.tour-price-block .price-amount {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-gold-primary);
  font-family: var(--font-serif);
}

/* DEVIL CHIMNEY CLEARANCE VISUALISER SECTION */
.visualiser-section {
  padding: 6rem 0;
  background-color: var(--color-cave-surface);
  border-top: 1px solid var(--color-cave-border);
  border-bottom: 1px solid var(--color-cave-border);
}

.visualiser-card {
  background-color: var(--color-cave-card);
  border: 1px solid var(--color-cave-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-elevated);
}

.visualiser-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.visualiser-display-box {
  background-color: var(--color-cave-dark);
  border: 2px dashed var(--color-cave-border);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  text-align: center;
  position: relative;
}

.tunnel-aperture-graphic {
  width: 220px;
  height: 220px;
  margin: 0 auto 1.5rem auto;
  border-radius: 50%;
  border: 6px solid var(--color-gold-primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle, #05070a 40%, #171c24 95%);
  box-shadow: inset 0 0 30px rgba(0,0,0,0.9), 0 0 25px rgba(212, 175, 55, 0.2);
  transition: all 0.3s ease;
}

.aperture-dimension {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold-hover);
}

.aperture-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-sandstone);
}

.comparison-box {
  background-color: rgba(255, 255, 255, 0.03);
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-top: 1rem;
  color: var(--color-text-muted);
}

.clearance-controls {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.control-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-main);
}

.control-slider {
  width: 100%;
  accent-color: var(--color-gold-primary);
  height: 6px;
  border-radius: 4px;
}

.slider-val-readout {
  font-family: var(--font-serif);
  color: var(--color-gold-primary);
  font-size: 1.2rem;
  font-weight: 700;
  margin-left: 0.5rem;
}

.disclaimer-box {
  background-color: rgba(15, 23, 42, 0.7);
  border-left: 4px solid var(--color-gold-primary);
  padding: 1.2rem;
  border-radius: var(--radius-sm);
  margin-top: 1.5rem;
}

.disclaimer-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-gold-primary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.disclaimer-text {
  font-size: 0.8rem;
  line-height: 1.5;
  color: #94a3b8;
  margin-bottom: 0;
}

/* Geology and Heritage Section */
.geology-section {
  padding: 6rem 0;
}

.geology-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.geology-card {
  background-color: var(--color-cave-surface);
  border: 1px solid var(--color-cave-border);
  padding: 2rem;
  border-radius: var(--radius-md);
}

.geology-card-number {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  color: var(--color-sandstone);
  margin-bottom: 0.8rem;
}

/* Modal for Booking Hand Off */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1.5rem;
}

.modal-content {
  background-color: var(--color-cave-card);
  border: 1px solid var(--color-gold-primary);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  padding: 2.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.modal-header {
  border-bottom: 1px solid var(--color-cave-border);
  padding-bottom: 1.2rem;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.6rem;
  color: var(--color-gold-primary);
}

.checklist-group {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: #cbd5e1;
}

.checkbox-item input {
  margin-top: 0.25rem;
  accent-color: var(--color-gold-primary);
  width: 18px;
  height: 18px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-cave-border);
  padding-top: 1.5rem;
}

/* Footer */
.site-footer {
  background-color: #07090c;
  border-top: 1px solid var(--color-cave-border);
  padding: 4rem 0 2rem 0;
  font-size: 0.85rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 1.2rem;
  color: var(--color-gold-primary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .availability-bar {
    grid-template-columns: 1fr;
  }
  .tours-grid,
  .visualiser-grid,
  .geology-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .nav-links {
    display: none;
  }
}