:root {
  --sendero-dark-abyss: #0b0e11;
  --sendero-stone-base: #14191f;
  --sendero-lava-gold: #ff7e47;
  --sendero-lava-hover: #ff9d73;
  --sendero-mist-white: #f3f5f7;
  --sendero-slate-dim: #a0aab5;
  --sendero-moss-glow: #2cb06a;
  --sendero-glass-fill: rgba(20, 25, 31, 0.65);
  --sendero-glass-border: rgba(255, 255, 255, 0.09);
  --sendero-glow-effect: 0 0 25px rgba(255, 126, 71, 0.25);
  --font-display-heading: 'Montserrat', sans-serif;
  --font-display-body: 'Open Sans', sans-serif;
  --sendero-radius: 16px;
  --sendero-padding-y: 10dvh;
}

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

body {
  background-color: var(--sendero-dark-abyss);
  color: var(--sendero-mist-white);
  font-family: var(--font-display-body);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #ffffff;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* Scroll progress bar */
.sendero-scroll-tracker {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--sendero-lava-gold);
  z-index: 10000;
  width: 0%;
  animation: sendero-indicator linear;
  animation-timeline: scroll();
}

@keyframes sendero-indicator {
  to { width: 100%; }
}

/* Header styling */
.sendero-sky-canopy {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(11, 14, 17, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sendero-glass-border);
  padding: 1rem 2rem;
}

.sendero-canopy-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sendero-brand-emblem {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display-heading);
  font-size: 1.3rem;
  font-weight: 950;
  letter-spacing: 2px;
  color: #ffffff;
}

.sendero-brand-emblem svg {
  fill: var(--sendero-lava-gold);
  filter: drop-shadow(0 0 8px rgba(255, 126, 71, 0.6));
}

.sendero-menu-trigger {
  display: none;
}

.sendero-nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.sendero-nav-item a {
  font-family: var(--font-display-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.sendero-nav-item a:hover,
.sendero-nav-item a.active {
  color: var(--sendero-lava-gold);
  border-bottom-color: var(--sendero-lava-gold);
}

.sendero-nav-cta {
  background: var(--sendero-lava-gold);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--sendero-radius);
  font-weight: 750;
  box-shadow: var(--sendero-glow-effect);
}

.sendero-nav-cta:hover {
  background: var(--sendero-lava-hover);
  transform: translateY(-2px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .sendero-nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--sendero-stone-base);
    padding: 2rem;
    border-bottom: 1px solid var(--sendero-glass-border);
    gap: 1.5rem;
  }

  .sendero-menu-trigger-label {
    display: block;
    cursor: pointer;
    padding: 0.5rem;
  }

  .sendero-menu-trigger-label span,
  .sendero-menu-trigger-label span::before,
  .sendero-menu-trigger-label span::after {
    display: block;
    background: #ffffff;
    height: 2px;
    width: 25px;
    position: relative;
    transition: 0.3s;
  }

  .sendero-menu-trigger-label span::before {
    content: '';
    top: -8px;
  }

  .sendero-menu-trigger-label span::after {
    content: '';
    top: 6px;
  }

  .sendero-menu-trigger:checked ~ .sendero-nav-links {
    display: flex;
  }
}

/* Hero Section (Preset D - Immersive Dark) */
.sendero-summit-masthead {
  height: 100vh;
  min-height: 650px;
  position: relative;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.sendero-summit-masthead::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, rgba(11, 14, 17, 0.4) 0%, rgba(11, 14, 17, 0.95) 100%);
  z-index: 1;
}

.sendero-glass-vault {
  position: relative;
  z-index: 2;
  max-width: 750px;
  width: 100%;
  background: var(--sendero-glass-fill);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--sendero-glass-border);
  padding: 3.5rem 3rem;
  border-radius: var(--sendero-radius);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  text-align: center;
  animation: sendero-view-reveal 0.8s ease-out;
}

@keyframes sendero-view-reveal {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.sendero-vault-badge {
  display: inline-block;
  background: rgba(255, 126, 71, 0.15);
  border: 1px solid var(--sendero-lava-gold);
  color: var(--sendero-lava-gold);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.sendero-vault-title {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.sendero-vault-text {
  font-size: 1.1rem;
  color: var(--sendero-slate-dim);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.sendero-lava-btn {
  display: inline-block;
  background: var(--sendero-lava-gold);
  color: #ffffff;
  font-family: var(--font-display-heading);
  font-weight: 750;
  padding: 1.1rem 2.5rem;
  border-radius: var(--sendero-radius);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  box-shadow: var(--sendero-glow-effect);
  cursor: pointer;
  border: none;
}

.sendero-lava-btn:hover {
  background: var(--sendero-lava-hover);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(255, 126, 71, 0.4);
}

.sendero-ghost-btn {
  display: inline-block;
  background: transparent;
  color: #ffffff;
  font-family: var(--font-display-heading);
  font-weight: 750;
  padding: 1.1rem 2.5rem;
  border-radius: var(--sendero-radius);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: 2px solid var(--sendero-lava-gold);
  transition: all 0.3s;
}

.sendero-ghost-btn:hover {
  background: rgba(255, 126, 71, 0.1);
  box-shadow: var(--sendero-glow-effect);
}

/* Content block: Zig-Zag layout (Dark immersive adaptation) */
.sendero-deep-exploration {
  padding: var(--sendero-padding-y) 2rem;
  background-color: var(--sendero-dark-abyss);
}

.sendero-exploration-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.sendero-exploration-media {
  border-radius: var(--sendero-radius);
  overflow: hidden;
  height: 480px;
  position: relative;
  box-shadow: 0 15px 35px rgba(0,0,0,0.6);
}

.sendero-exploration-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sendero-exploration-media::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(0deg, rgba(11, 14, 17, 0.9) 0%, transparent 60%);
}

.sendero-exploration-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.sendero-accent-title {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.sendero-accent-title span {
  color: var(--sendero-lava-gold);
}

.sendero-exploration-paragraph {
  color: var(--sendero-slate-dim);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.sendero-exploration-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sendero-exploration-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.sendero-bullet-marker {
  display: inline-flex;
  margin-top: 0.25rem;
  color: var(--sendero-moss-glow);
  filter: drop-shadow(0 0 5px rgba(44, 176, 106, 0.4));
}

.sendero-bullet-text h4 {
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: none;
  margin-bottom: 0.25rem;
}

.sendero-bullet-text p {
  color: var(--sendero-slate-dim);
  font-size: 0.95rem;
}

@media (max-width: 992px) {
  .sendero-exploration-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .sendero-exploration-media {
    height: 350px;
  }
}

/* Features Block: Glassmorphism Cards */
.sendero-features-atmosphere {
  padding: var(--sendero-padding-y) 2rem;
  background: radial-gradient(circle at center, var(--sendero-stone-base) 0%, var(--sendero-dark-abyss) 100%);
  position: relative;
}

.sendero-features-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.sendero-section-subtitle {
  color: var(--sendero-lava-gold);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 3px;
  margin-bottom: 1rem;
}

.sendero-features-row {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.sendero-glass-feature-card {
  background: var(--sendero-glass-fill);
  border: 1px solid var(--sendero-glass-border);
  border-top: 3px solid var(--sendero-lava-gold);
  padding: 3rem 2rem;
  border-radius: var(--sendero-radius);
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  backdrop-filter: blur(8px);
}

.sendero-glass-feature-card:hover {
  transform: translateY(-8px);
  border-top-color: var(--sendero-moss-glow);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(255, 126, 71, 0.1);
}

.sendero-feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 126, 71, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--sendero-lava-gold);
}

.sendero-glass-feature-card:hover .sendero-feature-icon {
  background: rgba(44, 176, 106, 0.15);
  color: var(--sendero-moss-glow);
}

.sendero-feature-card-title {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.sendero-feature-card-text {
  color: var(--sendero-slate-dim);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Timeline: "How it works" */
.sendero-progression-track {
  padding: var(--sendero-padding-y) 2rem;
  background-color: var(--sendero-stone-base);
}

.sendero-track-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 5rem;
}

.sendero-vertical-chronology {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 3rem;
}

.sendero-vertical-chronology::before {
  content: '';
  position: absolute;
  top: 0;
  left: 14px;
  bottom: 0;
  width: 3px;
  background: var(--sendero-lava-gold);
  box-shadow: 0 0 10px rgba(255, 126, 71, 0.5);
}

.sendero-chronology-milestone {
  position: relative;
  margin-bottom: 4rem;
}

.sendero-chronology-milestone:last-child {
  margin-bottom: 0;
}

.sendero-chronology-node {
  position: absolute;
  left: -43px;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--sendero-dark-abyss);
  border: 3px solid var(--sendero-lava-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--sendero-lava-gold);
  box-shadow: 0 0 15px rgba(255, 126, 71, 0.8);
  z-index: 2;
}

.sendero-chronology-body {
  background: var(--sendero-glass-fill);
  border: 1px solid var(--sendero-glass-border);
  padding: 2rem;
  border-radius: var(--sendero-radius);
  backdrop-filter: blur(10px);
}

.sendero-chronology-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.sendero-chronology-desc {
  color: var(--sendero-slate-dim);
  font-size: 0.95rem;
}

/* CTA strip */
.sendero-incitement-strip {
  padding: var(--sendero-padding-y) 2rem;
  background: radial-gradient(circle at center, #1b242e 0%, var(--sendero-dark-abyss) 100%);
  text-align: center;
  border-top: 1px solid var(--sendero-glass-border);
}

.sendero-incitement-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.sendero-incitement-title {
  font-size: 2.6rem;
  line-height: 1.3;
  margin-bottom: 1.5rem;
}

.sendero-incitement-desc {
  font-size: 1.1rem;
  color: var(--sendero-slate-dim);
  margin-bottom: 2.5rem;
}

/* Accordion layout for expert.html */
.sendero-accordion-catalog {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sendero-accordion-block {
  background: var(--sendero-glass-fill);
  border: 1px solid var(--sendero-glass-border);
  border-radius: var(--sendero-radius);
  overflow: hidden;
}

.sendero-accordion-head {
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  border-bottom: 1px solid var(--sendero-glass-border);
}

.sendero-accordion-num {
  font-family: var(--font-display-heading);
  font-size: 1.8rem;
  font-weight: 900;
  color: rgba(255, 126, 71, 0.3);
}

.sendero-accordion-head h3 {
  font-size: 1.2rem;
  text-transform: uppercase;
}

.sendero-accordion-panel {
  padding: 2rem;
  color: var(--sendero-slate-dim);
  font-size: 1rem;
}

/* Bio elements / Stats block */
.sendero-metric-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.sendero-metric-card {
  background: var(--sendero-glass-fill);
  border: 1px solid var(--sendero-glass-border);
  padding: 2.5rem;
  border-radius: var(--sendero-radius);
  text-align: center;
}

.sendero-metric-value {
  font-family: var(--font-display-heading);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--sendero-lava-gold);
  line-height: 1;
  margin-bottom: 0.5rem;
  text-shadow: var(--sendero-glow-effect);
}

.sendero-metric-label {
  color: var(--sendero-slate-dim);
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
}

/* Form block in reservation page */
.sendero-booking-card {
  background: var(--sendero-glass-fill);
  border: 1px solid var(--sendero-glass-border);
  padding: 3.5rem 3rem;
  border-radius: var(--sendero-radius);
  backdrop-filter: blur(20px);
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  max-width: 650px;
  margin: 0 auto;
}

.sendero-booking-title {
  text-align: center;
  margin-bottom: 2.5rem;
  font-size: 1.8rem;
}

.sendero-field-group {
  margin-bottom: 1.5rem;
}

.sendero-field-group label {
  display: block;
  font-family: var(--font-display-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.5rem;
  color: var(--sendero-slate-dim);
}

.sendero-field-group input,
.sendero-field-group textarea {
  width: 100%;
  background: rgba(11, 14, 17, 0.7);
  border: 1px solid var(--sendero-glass-border);
  color: #ffffff;
  padding: 1rem 1.25rem;
  border-radius: var(--sendero-radius);
  font-family: var(--font-display-body);
  font-size: 1rem;
  transition: all 0.3s;
}

.sendero-field-group input:focus,
.sendero-field-group textarea:focus {
  outline: none;
  border-color: var(--sendero-lava-gold);
  box-shadow: 0 0 10px rgba(255, 126, 71, 0.3);
}

.sendero-agreement-clause {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--sendero-slate-dim);
  cursor: pointer;
}

.sendero-agreement-clause input {
  margin-top: 0.2rem;
  accent-color: var(--sendero-lava-gold);
}

.sendero-vault-meta-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.sendero-meta-bullet {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--sendero-glass-border);
  border-left: 3px solid var(--sendero-lava-gold);
  padding: 1.25rem;
  border-radius: var(--sendero-radius);
}

.sendero-meta-bullet h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.sendero-meta-bullet p {
  font-size: 0.85rem;
  color: var(--sendero-slate-dim);
}

/* FAQ accordion underneath reservation */
.sendero-faq-segment {
  padding: var(--sendero-padding-y) 2rem;
  background: var(--sendero-dark-abyss);
}

.sendero-faq-grid {
  max-width: 800px;
  margin: 0 auto;
}

/* Footer layout */
.sendero-base-footer {
  background-color: #06080a;
  border-top: 1px solid var(--sendero-glass-border);
  padding: 4rem 2rem 2rem;
  font-size: 0.9rem;
  color: var(--sendero-slate-dim);
}

.sendero-footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .sendero-footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.sendero-footer-about h4,
.sendero-footer-links h4,
.sendero-footer-legal h4 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.sendero-footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.sendero-footer-disclaimer {
  line-height: 1.6;
  font-size: 0.8rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 1.5rem;
  margin-bottom: 1.5rem;
}

.sendero-footer-copyright {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

/* Cookie Banner styles */
.sendero-cookie-citadel {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(20, 25, 31, 0.95);
  backdrop-filter: blur(15px);
  border-top: 2px solid var(--sendero-lava-gold);
  z-index: 99999;
  padding: 1.5rem 2rem;
  transform: translateY(100%);
  transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  box-shadow: 0 -10px 40px rgba(0,0,0,0.5);
}

.sendero-cookie-citadel.visible {
  transform: translateY(0);
}

.sendero-cookie-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

@media (max-width: 768px) {
  .sendero-cookie-wrapper {
    flex-direction: column;
    text-align: center;
    gap: 1.25rem;
  }
}

.sendero-cookie-text p {
  font-size: 0.95rem;
  color: var(--sendero-mist-white);
}

.sendero-cookie-controls {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

.sendero-cookie-btn-accept {
  background: var(--sendero-lava-gold);
  color: #ffffff;
  font-family: var(--font-display-heading);
  font-size: 0.8rem;
  font-weight: 750;
  border: none;
  padding: 0.75rem 1.75rem;
  border-radius: var(--sendero-radius);
  cursor: pointer;
}

.sendero-cookie-btn-decline {
  background: transparent;
  color: var(--sendero-slate-dim);
  font-family: var(--font-display-heading);
  font-size: 0.8rem;
  font-weight: 700;
  border: 1px solid var(--sendero-glass-border);
  padding: 0.75rem 1.75rem;
  border-radius: var(--sendero-radius);
  cursor: pointer;
}

.sendero-cookie-btn-accept:hover {
  background: var(--sendero-lava-hover);
}

.sendero-cookie-btn-decline:hover {
  background: rgba(255,255,255,0.05);
}

/* Animations Scroll Reveal (Scroll-driven animations built natively) */
.sendero-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.7s ease-out;
}

.sendero-reveal.active {
  opacity: 1;
  transform: none;
}