/* Custom CSS Variables defined topically for Eye Health Education */
:root {
  --eye-deep-cosmos: #080c14;
  --eye-void-surface: #0f172a;
  --eye-luminous-cyan: #00f2fe;
  --eye-luminous-purple: #9d4edd;
  --eye-crystal-white: #f8fafc;
  --eye-shadow-slate: #64748b;
  --eye-aurora-gradient: linear-gradient(135deg, #00f2fe 0%, #9d4edd 100%);
  --eye-translucent-plate: rgba(15, 23, 42, 0.65);
  --eye-translucent-border: rgba(0, 242, 254, 0.2);
  
  --eye-font-display: 'Montserrat', sans-serif;
  --eye-font-body: 'Poppins', sans-serif;
  
  --eye-radius-soft: 16px;
  --eye-glow-deep: 0 8px 32px 0 rgba(0, 242, 254, 0.15);
  --eye-glow-intense: 0 0 20px rgba(0, 242, 254, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--eye-font-body);
  background-color: var(--eye-deep-cosmos);
  color: var(--eye-crystal-white);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Scroll Progress Bar */
.scroll-progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--eye-aurora-gradient);
  width: 0%;
  z-index: 10000;
  animation: grow-progress linear;
  animation-timeline: scroll();
}

@keyframes grow-progress {
  to { width: 100%; }
}

/* Header Styles */
.eye-navigation-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--eye-translucent-border);
}

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

.eye-brand-identity {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--eye-crystal-white);
  font-family: var(--eye-font-display);
  font-weight: 800;
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.eye-brand-identity svg {
  filter: drop-shadow(0 0 8px var(--eye-luminous-cyan));
}

.eye-navigation-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.eye-navigation-menu a {
  color: var(--eye-crystal-white);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  text-transform: uppercase;
}

.eye-navigation-menu a:hover {
  color: var(--eye-luminous-cyan);
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.6);
}

/* Mobile Hamburger Menu */
.eye-menu-toggle-checkbox {
  display: none;
}

.eye-menu-hamburger-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1001;
}

.eye-menu-hamburger-btn span {
  display: block;
  width: 28px;
  height: 3px;
  background-color: var(--eye-crystal-white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Hero Section style for Index */
.eye-immersive-hero-wrapper {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-image: linear-gradient(rgba(8, 12, 20, 0.8), rgba(8, 12, 20, 0.85)), url('img/bg.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  padding: 8rem 2rem 4rem 2rem;
}

.eye-hero-glass-lens {
  max-width: 650px;
  padding: 3.5rem;
  background: var(--eye-translucent-plate);
  backdrop-filter: blur(16px);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  box-shadow: var(--eye-glow-deep);
  margin-left: 5%;
}

.eye-hero-tagline {
  color: var(--eye-luminous-cyan);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.eye-hero-headline {
  font-family: var(--eye-font-display);
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  background: var(--eye-aurora-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eye-hero-description {
  color: var(--eye-shadow-slate);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

.eye-cta-anchor-glow {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--eye-aurora-gradient);
  color: var(--eye-crystal-white);
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.eye-cta-anchor-glow:hover {
  transform: translateY(-3px);
  box-shadow: var(--eye-glow-intense);
}

/* Glassmorphism Feature Grid Section */
.eye-features-outer-grid {
  padding: 10dvh 2rem;
  background: #090e1a;
  position: relative;
}

.eye-section-head-card {
  text-align: center;
  margin-bottom: 4rem;
}

.eye-section-pretitle {
  color: var(--eye-luminous-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.eye-section-maintitle {
  font-family: var(--eye-font-display);
  font-size: 2.2rem;
  text-transform: uppercase;
  margin-top: 0.5rem;
}

.eye-bento-cards-structure {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.eye-bento-card-element {
  background: var(--eye-translucent-plate);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  padding: 2.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.eye-bento-card-element:hover {
  transform: translateY(-5px);
  border-color: var(--eye-luminous-purple);
  box-shadow: var(--eye-glow-deep);
}

.eye-bento-icon-box {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(0, 242, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--eye-luminous-cyan);
}

.eye-bento-card-title {
  font-family: var(--eye-font-display);
  font-size: 1.25rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.eye-bento-card-text {
  color: var(--eye-shadow-slate);
  font-size: 0.95rem;
}

/* Split Content Section (Zigzag alternative in Preset D) */
.eye-split-nature-section {
  display: flex;
  min-height: 550px;
  background: var(--eye-deep-cosmos);
}

.eye-split-image-half {
  flex: 1;
  background-image: linear-gradient(rgba(8, 12, 20, 0.4), rgba(8, 12, 20, 0.4)), url('img/bg2.webp');
  background-size: cover;
  background-position: center;
  min-height: 350px;
}

.eye-split-text-half {
  flex: 1;
  padding: 5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--eye-void-surface);
}

.eye-split-text-title {
  font-family: var(--eye-font-display);
  font-size: 2rem;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.eye-split-text-description {
  color: var(--eye-shadow-slate);
  margin-bottom: 2rem;
}

.eye-split-bullet-list {
  list-style: none;
}

.eye-split-bullet-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
}

.eye-split-bullet-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  background: var(--eye-luminous-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--eye-luminous-cyan);
}

/* Vertical Progress Timeline (How it works in Preset D) */
.eye-vertical-timeline-wrap {
  padding: 10dvh 2rem;
  background: #090e1a;
}

.eye-timeline-shell {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 3rem;
}

.eye-timeline-connector-line {
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--eye-aurora-gradient);
}

.eye-timeline-item {
  position: relative;
  margin-bottom: 4rem;
}

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

.eye-timeline-marker-dot {
  position: absolute;
  left: -40px;
  top: 0;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  background: var(--eye-deep-cosmos);
  border: 3px solid var(--eye-luminous-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--eye-luminous-cyan);
  box-shadow: 0 0 12px var(--eye-luminous-cyan);
}

.eye-timeline-content-card {
  background: var(--eye-translucent-plate);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  padding: 2rem;
}

.eye-timeline-item-title {
  font-family: var(--eye-font-display);
  font-size: 1.25rem;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.eye-timeline-item-text {
  color: var(--eye-shadow-slate);
}

/* CTA strip style (Preset D) */
.eye-unification-cta-strip {
  padding: 8dvh 2rem;
  background: linear-gradient(rgba(8,12,20,0.9), rgba(8,12,20,0.9)), url('img/bg.webp');
  background-size: cover;
  background-position: center;
  text-align: center;
  border-top: 1px solid var(--eye-translucent-border);
  border-bottom: 1px solid var(--eye-translucent-border);
}

.eye-unification-title {
  font-family: var(--eye-font-display);
  font-size: 2.2rem;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.eye-ghost-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--eye-luminous-cyan);
  border: 2px solid var(--eye-luminous-cyan);
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.3s ease;
}

.eye-ghost-button:hover {
  background: var(--eye-luminous-cyan);
  color: var(--eye-deep-cosmos);
  box-shadow: var(--eye-glow-intense);
}

/* Stats block style for Expert page */
.eye-horizontal-stats-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 4rem 2rem;
}

.eye-stat-counter-box {
  background: var(--eye-translucent-plate);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  padding: 2rem;
  text-align: center;
}

.eye-stat-numeric-value {
  font-family: var(--eye-font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--eye-luminous-cyan);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.eye-stat-label-text {
  color: var(--eye-shadow-slate);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Accordion Component */
.eye-custom-accordion-block {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.eye-accordion-headline {
  font-family: var(--eye-font-display);
  font-size: 1.8rem;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 3rem;
}

.eye-faq-item-container {
  background: var(--eye-translucent-plate);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.eye-faq-details-summary {
  padding: 1.5rem 2rem;
  cursor: pointer;
  font-family: var(--eye-font-display);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.eye-faq-details-summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--eye-luminous-cyan);
}

.eye-faq-item-container[open] .eye-faq-details-summary::after {
  content: '−';
}

.eye-faq-body-content {
  padding: 0 2rem 1.5rem 2rem;
  color: var(--eye-shadow-slate);
}

/* Form block style for Reserve page */
.eye-registration-form-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--eye-translucent-plate);
  border: 1px solid var(--eye-translucent-border);
  border-radius: var(--eye-radius-soft);
  padding: 3rem;
  box-shadow: var(--eye-glow-deep);
}

.eye-form-title-text {
  font-family: var(--eye-font-display);
  font-size: 1.8rem;
  text-transform: uppercase;
  margin-bottom: 2rem;
  text-align: center;
}

.eye-form-field-group {
  margin-bottom: 1.5;
}

.eye-form-input-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--eye-crystal-white);
}

.eye-form-text-input {
  width: 100%;
  padding: 1rem 1.5rem;
  background: rgba(8, 12, 20, 0.8);
  border: 1px solid var(--eye-translucent-border);
  border-radius: 8px;
  color: var(--eye-crystal-white);
  font-family: var(--eye-font-body);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.eye-form-text-input:focus {
  outline: none;
  border-color: var(--eye-luminous-cyan);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.eye-consent-checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.eye-consent-checkbox-wrap input[type="checkbox"] {
  margin-top: 0.25rem;
  cursor: pointer;
}

.eye-consent-text-label {
  font-size: 0.85rem;
  color: var(--eye-shadow-slate);
}

.eye-consent-text-label a {
  color: var(--eye-luminous-cyan);
  text-decoration: underline;
}

.eye-action-submit-btn {
  width: 100%;
  padding: 1.25rem;
  background: var(--eye-aurora-gradient);
  color: var(--eye-crystal-white);
  border: none;
  border-radius: 999px;
  font-family: var(--eye-font-display);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.eye-action-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--eye-glow-intense);
}

/* Footer structure */
.eye-global-footer-block {
  margin-top: auto;
  background: #05080e;
  border-top: 1px solid var(--eye-translucent-border);
  padding: 4rem 2rem 2rem 2rem;
}

.eye-footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.eye-footer-flex-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 3rem;
}

.eye-footer-nav-links {
  display: flex;
  gap: 2rem;
}

.eye-footer-nav-links a {
  color: var(--eye-shadow-slate);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.eye-footer-nav-links a:hover {
  color: var(--eye-luminous-cyan);
}

.eye-disclaimer-block-paragraph {
  font-size: 0.8rem;
  color: var(--eye-shadow-slate);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  margin-bottom: 1.5rem;
}

.eye-clink-copyright {
  font-size: 0.8rem;
  color: var(--eye-shadow-slate);
  text-align: center;
}

/* Cookie Banner Styles */
.eye-cookie-alert-plate {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--eye-translucent-border);
  padding: 1.5rem 2rem;
  z-index: 99999;
  display: none;
}

.eye-cookie-inner-layout {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.eye-cookie-alert-text {
  font-size: 0.9rem;
  color: var(--eye-crystal-white);
  flex: 1;
  min-width: 280px;
}

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

.eye-cookie-btn-accept {
  padding: 0.75rem 1.5rem;
  background: var(--eye-aurora-gradient);
  border: none;
  color: var(--eye-crystal-white);
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.eye-cookie-btn-decline {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: 1px solid var(--eye-shadow-slate);
  color: var(--eye-shadow-slate);
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  text-transform: uppercase;
  font-size: 0.8rem;
  transition: all 0.3s ease;
}

.eye-cookie-btn-decline:hover {
  border-color: var(--eye-crystal-white);
  color: var(--eye-crystal-white);
}

/* Page content layouts */
.eye-static-text-container {
  max-width: 800px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.eye-static-title-main {
  font-family: var(--eye-font-display);
  font-size: 2.5rem;
  text-transform: uppercase;
  margin-bottom: 2rem;
  background: var(--eye-aurora-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eye-static-para-text {
  color: var(--eye-shadow-slate);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.eye-static-section-subhead {
  font-family: var(--eye-font-display);
  font-size: 1.5rem;
  text-transform: uppercase;
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--eye-luminous-cyan);
}

/* Scroll-driven animations viewport view */
.eye-reveal-on-viewport {
  animation: slide-element-up 0.5s linear both;
  animation-timeline: view();
  animation-range: entry 0% entry 35%;
}

@keyframes slide-element-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Responsive Rules */
@media (max-width: 992px) {
  .eye-bento-cards-structure {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .eye-split-nature-section {
    flex-direction: column;
  }
  
  .eye-split-text-half {
    padding: 3rem 2rem;
  }
  
  .eye-horizontal-stats-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .eye-menu-hamburger-btn {
    display: flex;
  }
  
  .eye-navigation-menu {
    position: fixed;
    top: 75px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 75px);
    background: rgba(8, 12, 20, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 4rem 2rem;
    transition: left 0.4s cubic-bezier(0.77,0.2,0.05,1.0);
    z-index: 1000;
  }
  
  .eye-menu-toggle-checkbox:checked ~ .eye-navigation-menu {
    left: 0;
  }
  
  .eye-menu-toggle-checkbox:checked ~ .eye-menu-hamburger-btn span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .eye-menu-toggle-checkbox:checked ~ .eye-menu-hamburger-btn span:nth-child(2) {
    opacity: 0;
  }
  
  .eye-menu-toggle-checkbox:checked ~ .eye-menu-hamburger-btn span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -7px);
  }
  
  .eye-immersive-hero-wrapper {
    background-attachment: scroll;
    justify-content: center;
    padding: 6rem 1rem 3rem 1rem;
  }
  
  .eye-hero-glass-lens {
    margin-left: 0;
    padding: 2rem;
    text-align: center;
  }
  
  .eye-hero-headline {
    font-size: 2.2rem;
  }
  
  .eye-bento-cards-structure {
    grid-template-columns: 1fr;
  }
  
  .eye-horizontal-stats-container {
    grid-template-columns: 1fr;
  }
  
  .eye-cookie-inner-layout {
    flex-direction: column;
    align-items: stretch;
  }
}