:root {
  --optic-dark-void: #090d16;
  --optic-dark-surface: rgba(13, 21, 38, 0.75);
  --optic-active-highlight: #14223f;
  --optic-cyber-neon: #00f2fe;
  --optic-neon-hover: #00b8d4;
  --optic-text-pure: #ffffff;
  --optic-text-silver: #c5cbd3;
  --optic-glass-border: rgba(0, 242, 254, 0.15);
  --font-display: 'Montserrat', 'Helvetica', 'Arial', sans-serif;
  --font-body: 'Open Sans', 'Helvetica', 'Arial', sans-serif;
  --optic-radius-soft: 16px;
  --optic-shadow-heavy: 0 15px 45px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 242, 254, 0.1);
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.optic-immersive-body {
  background-color: var(--optic-dark-void);
  color: var(--optic-text-silver);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Scroll Indicators and Progress bar */
@keyframes progress-extend {
  to { width: 100%; }
}

.scroll-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--optic-cyber-neon), var(--optic-neon-hover));
  animation: progress-extend linear;
  animation-timeline: scroll();
}

/* Dynamic scroll entrance animations */
@keyframes eye-fade-reveal {
  from {
    opacity: 0;
    transform: translateY(35px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.transition-reveal {
  animation: eye-fade-reveal 0.8s ease-out both;
  animation-timeline: view();
  animation-range: entry 5% entry 35%;
}

/* Typography styles */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--optic-text-pure);
}

.optic-main-heading {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 0%, var(--optic-cyber-neon) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.optic-sub-heading {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: 1.25rem;
  text-align: center;
  position: relative;
}

.gaze-center-title {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 4rem;
}

.cornea-word-block {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  color: var(--optic-text-silver);
}

/* Specific badge style */
.optic-accent-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: bold;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--optic-cyber-neon);
  border: 1px solid var(--optic-cyber-neon);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
}

/* Common Layout structures */
.pupil-capsule {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.iris-division {
  padding: 10dvh 0;
}

.dynamic-dark-glow-bg {
  background: radial-gradient(circle at center, #0f182b 0%, var(--optic-dark-void) 100%);
}

/* Header style - Sticky Transparent preset D */
.optic-scrolling-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--optic-glass-border);
}

.iris-header-hull {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
}

.sight-nav-branding {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 0.75rem;
}

.retina-logo-vector {
  filter: drop-shadow(0 0 6px rgba(0, 242, 254, 0.7));
}

.sight-brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: 1.5px;
  color: var(--optic-text-pure);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.sight-nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.sight-nav-anchor {
  text-decoration: none;
  color: var(--optic-text-silver);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  padding: 0.5rem 0;
  position: relative;
}

.sight-nav-anchor:hover,
.sight-nav-anchor.sight-active-anchor {
  color: var(--optic-cyber-neon);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
}

/* CSS Only Burger Menu */
.sight-burger-icon {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
}

.sight-burger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--optic-text-pure);
  transition: all 0.3s ease;
}

/* Hero section preset D - Fullscreen with Glassmorphism */
.retina-viewport-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  position: relative;
  padding-top: 80px;
}

.glassmorphism-hero-shield {
  background: var(--optic-dark-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--optic-glass-border);
  padding: 3.5rem;
  border-radius: var(--optic-radius-soft);
  max-width: 650px;
  box-shadow: var(--optic-shadow-heavy);
}

/* Action button trigger classes */
.sight-action-cluster {
  display: flex;
  gap: 1.25rem;
}

.action-optic-link {
  display: inline-block;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: bold;
  font-size: 1rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 1.1rem 2.2rem;
  border-radius: var(--optic-radius-soft);
  transition: all 0.3s ease;
  text-align: center;
}

.sight-btn-solid {
  background: linear-gradient(135deg, var(--optic-cyber-neon) 0%, var(--optic-neon-hover) 100%);
  color: var(--optic-dark-void);
  box-shadow: 0 5px 20px rgba(0, 242, 254, 0.3);
}

.sight-btn-solid:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.5);
  filter: brightness(1.1);
}

.sight-btn-ghost {
  border: 2px solid var(--optic-cyber-neon);
  color: var(--optic-cyber-neon);
  background: transparent;
}

.sight-btn-ghost:hover {
  background: var(--optic-cyber-neon);
  color: var(--optic-dark-void);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
  transform: translateY(-3px);
}

/* Vertical split section (Home) */
.retina-paving-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.vision-image-frame {
  position: relative;
  border-radius: var(--optic-radius-soft);
  overflow: hidden;
  box-shadow: var(--optic-shadow-heavy);
  border: 1px solid var(--optic-glass-border);
}

.sight-fluid-media {
  width: 100%;
  height: 520px;
  object-fit: cover;
  display: block;
}

.eye-flow-list {
  list-style-type: none;
  margin-top: 2rem;
}

.eye-flow-list li {
  position: relative;
  padding-left: 2.25rem;
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.eye-flow-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--optic-cyber-neon);
  box-shadow: 0 0 8px var(--optic-cyber-neon);
}

/* 3 columns Glassmorphism merits */
.optic-merits-deck {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.25rem;
}

.retina-glow-card {
  background: var(--optic-dark-surface);
  backdrop-filter: blur(10px);
  border-top: 3px solid var(--optic-cyber-neon);
  border-left: 1px solid var(--optic-glass-border);
  border-right: 1px solid var(--optic-glass-border);
  border-bottom: 1px solid var(--optic-glass-border);
  padding: 3rem 2.25rem;
  border-radius: var(--optic-radius-soft);
  transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.retina-glow-card:hover {
  transform: translateY(-8px);
  border-top-color: var(--optic-text-pure);
  box-shadow: 0 15px 40px rgba(0, 242, 254, 0.15);
}

.glow-card-icon {
  color: var(--optic-cyber-neon);
  margin-bottom: 1.5rem;
  display: inline-block;
  background: rgba(0, 242, 254, 0.08);
  padding: 1rem;
  border-radius: 12px;
}

.retina-glow-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* Timeline stepper - how it works */
.pupil-timeline-track {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 3.5rem;
}

.pupil-timeline-track::before {
  content: "";
  position: absolute;
  left: 1.125rem;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--optic-cyber-neon) 0%, var(--optic-dark-surface) 100%);
}

.timeline-stepper-item {
  position: relative;
  margin-bottom: 3.5rem;
}

.timeline-stepper-item:last-child {
  margin-bottom: 0;
}

.timeline-step-indicator {
  position: absolute;
  left: -3.5rem;
  top: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--optic-dark-void);
  border: 3px solid var(--optic-cyber-neon);
  box-shadow: 0 0 12px var(--optic-cyber-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--optic-text-pure);
  z-index: 10;
}

.timeline-step-content p {
  margin-top: 0.5rem;
}

/* CTA inline-strip style */
.sight-glowing-banner {
  background: linear-gradient(135deg, rgba(13, 21, 38, 0.95) 0%, rgba(9, 13, 22, 0.95) 100%);
  border: 1px solid var(--optic-glass-border);
  border-left: 5px solid var(--optic-cyber-neon);
  padding: 4rem;
  border-radius: var(--optic-radius-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  box-shadow: var(--optic-shadow-heavy);
}

.banner-text-inner {
  flex: 1;
}

.banner-text-inner h2 {
  text-align: left;
  margin-bottom: 0.75rem;
}

/* Expert Page Specific CSS styles */
.expert-acc-shell {
  max-width: 850px;
  margin: 3rem auto 0;
}

.expert-acc-item {
  background: var(--optic-dark-surface);
  border: 1px solid var(--optic-glass-border);
  margin-bottom: 1.5rem;
  border-radius: var(--optic-radius-soft);
  overflow: hidden;
}

.expert-acc-header {
  font-family: var(--font-display);
  font-weight: bold;
  color: var(--optic-text-pure);
  padding: 1.5rem 2rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.expert-acc-header::-webkit-details-marker {
  display: none;
}

.expert-acc-header svg {
  transition: transform 0.3s;
  color: var(--optic-cyber-neon);
}

.expert-acc-item[open] .expert-acc-header svg {
  transform: rotate(180deg);
}

.expert-acc-body {
  padding: 0 2rem 2rem;
  border-top: 1px solid var(--optic-glass-border);
  padding-top: 1.5rem;
}

.stats-grid-shell {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.stat-indicator-card {
  background: var(--optic-dark-surface);
  border: 1px solid var(--optic-glass-border);
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-radius: var(--optic-radius-soft);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.stat-number-display {
  display: block;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--optic-cyber-neon);
  margin-bottom: 0.5rem;
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.stat-caption {
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Booking Layout - Preset D (Form inside Hero element) */
.booking-content-split {
  display: grid;
  grid-template-columns: 1fr 500px;
  gap: 4rem;
  align-items: center;
}

.booking-perks-stack {
  margin-top: 3rem;
}

.booking-perk-node {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.booking-perk-bullet {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--optic-cyber-neon);
  box-shadow: 0 0 8px var(--optic-cyber-neon);
  flex-shrink: 0;
  margin-top: 6px;
}

.booking-glass-panel {
  background: rgba(13, 21, 38, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--optic-glass-border);
  border-radius: var(--optic-radius-soft);
  padding: 3.5rem;
  box-shadow: var(--optic-shadow-heavy);
}

.form-title-text {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.form-subtitle-text {
  font-size: 0.95rem;
  margin-bottom: 2rem;
  color: var(--optic-text-silver);
}

.optic-web-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-field-unit {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-field-unit label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--optic-text-pure);
  text-transform: uppercase;
}

.form-field-unit input,
.form-field-unit textarea {
  background: rgba(9, 13, 22, 0.8);
  border: 1px solid var(--optic-glass-border);
  padding: 1rem;
  border-radius: 8px;
  color: #fff;
  font-family: var(--font-body);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-field-unit input:focus,
.form-field-unit textarea:focus {
  outline: none;
  border-color: var(--optic-cyber-neon);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.form-consent-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.form-consent-wrap input {
  margin-top: 4px;
  accent-color: var(--optic-cyber-neon);
}

.form-consent-wrap label {
  font-size: 0.85rem;
}

.form-consent-wrap label a {
  color: var(--optic-cyber-neon);
}

.form-direct-mail {
  text-align: center;
  margin-top: 1.75rem;
  font-size: 0.85rem;
}

.form-direct-mail a {
  color: var(--optic-cyber-neon);
  text-decoration: none;
}

/* FAQ accordion underneath (booking) */
.faq-accordion-group {
  max-width: 850px;
  margin: 3rem auto 0;
}

.faq-accordion-node {
  background: var(--optic-dark-surface);
  border: 1px solid var(--optic-glass-border);
  border-radius: var(--optic-radius-soft);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.faq-accordion-node h4 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--optic-text-pure);
}

/* Legal text styling */
.legal-text-container a {
  color: var(--optic-cyber-neon);
  text-decoration: none;
}

/* Footer layout (all pages) */
.iris-footer-shell {
  background: #05080e;
  border-top: 1px solid var(--optic-glass-border);
  padding: 6rem 0 3rem;
  margin-top: 6dvh;
}

.footer-core-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brief-text {
  margin-top: 1.5rem;
  color: var(--optic-text-silver);
  max-width: 380px;
}

.footer-link-group h4 {
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.footer-link-group a {
  display: block;
  color: var(--optic-text-silver);
  text-decoration: none;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  transition: color 0.3s;
}

.footer-link-group a:hover {
  color: var(--optic-cyber-neon);
}

.footer-bottom-barrier {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 3rem;
}

.footer-disclaimer-notice {
  font-size: 0.8rem;
  line-height: 1.7;
  color: #727e8e;
  margin-bottom: 2rem;
}

.footer-copyright-text {
  font-size: 0.85rem;
  color: #555e6a;
}

/* Cookie overlay-box styling */
.cookie-overlay-wrap {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(9, 13, 22, 0.95);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--optic-cyber-neon);
  z-index: 10000;
  padding: 1.5rem 0;
  display: none;
}

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

.cookie-banner-message {
  font-size: 0.95rem;
  color: var(--optic-text-pure);
}

.cookie-banner-buttons {
  display: flex;
  gap: 1rem;
}

.cookie-btn-dismiss {
  background: transparent;
  color: var(--optic-text-silver);
  border: 1px solid var(--optic-glass-border);
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: bold;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.cookie-btn-confirm {
  background: var(--optic-cyber-neon);
  color: var(--optic-dark-void);
  border: none;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: bold;
  font-size: 0.85rem;
  text-transform: uppercase;
}

/* Mobile responsive fixes */
@media (max-width: 1024px) {
  .retina-paving-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .sight-fluid-media {
    height: 380px;
  }
  .optic-merits-deck {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sight-glowing-banner {
    flex-direction: column;
    padding: 3rem 2rem;
    text-align: center;
  }
  .banner-text-inner h2 {
    text-align: center;
  }
  .booking-content-split {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .stats-grid-shell {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .sight-burger-icon {
    display: flex;
    z-index: 1001;
  }
  .sight-nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: #0c1424;
    flex-direction: column;
    justify-content: center;
    gap: 3rem;
    transition: right 0.4s ease;
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    z-index: 1000;
  }
  #sight-mobile-trigger:checked ~ .sight-nav-menu {
    right: 0;
  }
  #sight-mobile-trigger:checked ~ .sight-burger-icon span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  #sight-mobile-trigger:checked ~ .sight-burger-icon span:nth-child(2) {
    opacity: 0;
  }
  #sight-mobile-trigger:checked ~ .sight-burger-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
  .footer-core-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .cookie-banner-inner {
    flex-direction: column;
    text-align: center;
  }
  .glassmorphism-hero-shield {
    padding: 2rem;
  }
  .booking-glass-panel {
    padding: 2rem;
  }
}