/* Custom CSS Variables - Theme: Vivid Eye Health Theme */
:root {
  --visio-dark-canvas: #0B132B;
  --visio-surface-dark: #1C2541;
  --visio-surface-mid: #2A385B;
  --visio-accent-cyan: #00B4D8;
  --visio-vivid-teal: #00E6A5;
  --visio-vivid-coral: #FF5A5F;
  --visio-text-pure: #FFFFFF;
  --visio-text-muted: #C0CEE0;
  --visio-hdr-gradient: linear-gradient(135deg, #00B4D8 0%, #00E6A5 100%);
  --visio-stage-gradient: linear-gradient(145deg, #0B132B 0%, #1C2541 65%, #0F2038 100%);
  
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  --visio-radius-pill: 999px;
  --visio-radius-soft: 16px;
  --visio-pad-scale: 10dvh;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--visio-dark-canvas);
  color: var(--visio-text-pure);
  font-family: var(--font-body);
  line-height: 1.6;
}

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

main {
  flex: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Scroll-driven animations */
@keyframes opti-scroll-progress {
  from { width: 0%; }
  to { width: 100%; }
}

@keyframes opti-fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.opti-feat-card,
.opti-step-node,
.opti-info-box,
.opti-faq-card {
  animation: opti-fade-in-up auto linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 30%;
}

/* PRESET C HEADER: Accent-color background, white text/links */
.opti-hdr-anchor {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--visio-hdr-gradient);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.opti-scroll-line {
  height: 4px;
  background: var(--visio-vivid-coral);
  width: 0%;
  animation: opti-scroll-progress linear;
  animation-timeline: scroll();
}

.opti-hdr-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.opti-brand-symbol {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: #FFFFFF;
}

.opti-logo-ico {
  width: 32px;
  height: 32px;
  color: #FFFFFF;
}

.opti-check-drawer {
  display: none;
}

.opti-burger-trigger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.opti-burger-trigger span {
  width: 26px;
  height: 3px;
  background-color: #FFFFFF;
  border-radius: 3px;
  transition: all 0.3s ease;
}

.opti-navigation-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.opti-nav-item {
  color: #FFFFFF;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  transition: background 0.2s ease, opacity 0.2s ease;
}

.opti-nav-item:hover,
.opti-active-link {
  background: rgba(255, 255, 255, 0.2);
}

/* HERO PRESET C */
.opti-top-stage {
  position: relative;
  min-height: 85vh;
  background: var(--visio-stage-gradient);
  padding: var(--visio-pad-scale) 2rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.opti-num-bg {
  position: absolute;
  top: 50%;
  left: 5%;
  transform: translateY(-50%);
  font-size: 20rem;
  font-family: var(--font-display);
  font-weight: 900;
  color: #FFFFFF;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

.opti-stage-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4rem;
  position: relative;
  z-index: 2;
}

.opti-lead-column {
  max-width: 650px;
}

.opti-tagline-chip {
  display: inline-block;
  background: rgba(0, 230, 165, 0.15);
  color: var(--visio-vivid-teal);
  padding: 0.4rem 1rem;
  border-radius: var(--visio-radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1.2rem;
  border: 1px solid rgba(0, 230, 165, 0.3);
}

.opti-main-heading {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--visio-text-pure);
  margin-bottom: 1.5rem;
}

.opti-lead-text {
  font-size: 1.15rem;
  color: var(--visio-text-muted);
  margin-bottom: 2.5rem;
}

.opti-hero-actions {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.opti-action-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2.2rem;
  border-radius: var(--visio-radius-pill);
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  border: none;
}

.opti-pill-bright {
  background: var(--visio-vivid-teal);
  color: var(--visio-dark-canvas);
  box-shadow: 0 8px 25px rgba(0, 230, 165, 0.3);
}

.opti-pill-bright:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 230, 165, 0.45);
}

.opti-pill-outline {
  background: transparent;
  color: var(--visio-text-pure);
  border: 2px solid var(--visio-accent-cyan);
}

.opti-pill-outline:hover {
  background: rgba(0, 180, 216, 0.15);
  transform: translateY(-2px);
}

/* Abstract CSS shapes right */
.opti-shape-graphic {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.opti-visual-circle {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 8px solid var(--visio-accent-cyan);
  box-shadow: 0 0 40px rgba(0, 180, 216, 0.4);
}

.opti-visual-rect {
  position: absolute;
  width: 180px;
  height: 180px;
  background: var(--visio-vivid-teal);
  border-radius: var(--visio-radius-soft);
  opacity: 0.25;
  transform: rotate(25deg);
}

/* DIAG CONTENT PRESET C: clip-path diagonal polygon */
.opti-diag-content {
  background: linear-gradient(rgba(11, 19, 43, 0.85), rgba(11, 19, 43, 0.92)), url('img/bg2.webp') center/cover no-repeat;
  clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
  padding: calc(var(--visio-pad-scale) + 3rem) 2rem;
  margin: -2rem 0;
}

.opti-diag-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.opti-glass-panel {
  background: rgba(28, 37, 65, 0.85);
  backdrop-filter: blur(12px);
  padding: 3rem;
  border-radius: var(--visio-radius-soft);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.opti-section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--visio-vivid-teal);
}

.opti-body-paragraph {
  font-size: 1.05rem;
  color: var(--visio-text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

/* FEATURES PRESET C: 4-col grid + large ordinal numbers */
.opti-num-features {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-dark-canvas);
}

.opti-features-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

.opti-center-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 4rem;
  letter-spacing: 0.5px;
}

.opti-quad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
}

.opti-feat-card {
  background: var(--visio-surface-dark);
  padding: 2.5rem 1.8rem;
  border-radius: var(--visio-radius-soft);
  border-bottom: 4px solid var(--visio-vivid-teal);
  transition: transform 0.3s ease;
}

.opti-feat-card:hover {
  transform: translateY(-5px);
}

.opti-big-digit {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--visio-accent-cyan);
  line-height: 1;
  margin-bottom: 1rem;
}

.opti-card-head {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.opti-card-text {
  font-size: 0.95rem;
  color: var(--visio-text-muted);
}

/* STEPS PRESET C: horizontal steps with solid line connector */
.opti-steps-track {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-surface-dark);
}

.opti-steps-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.opti-connector-line {
  position: absolute;
  top: 130px;
  left: 10%;
  right: 10%;
  height: 4px;
  background: var(--visio-vivid-teal);
  z-index: 1;
}

.opti-steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 2;
}

.opti-step-node {
  text-align: center;
  padding: 1rem;
}

.opti-step-bubble {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem auto;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.8rem;
}

.opti-node-filled .opti-step-bubble {
  background: var(--visio-vivid-teal);
  color: var(--visio-dark-canvas);
  box-shadow: 0 0 20px rgba(0, 230, 165, 0.4);
}

.opti-node-outline .opti-step-bubble {
  background: var(--visio-dark-canvas);
  color: var(--visio-vivid-teal);
  border: 4px solid var(--visio-vivid-teal);
}

.opti-step-head {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.opti-step-text {
  font-size: 0.95rem;
  color: var(--visio-text-muted);
}

/* CTA STRIP PRESET C */
.opti-action-banner {
  background: #050B1A;
  padding: 4rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.opti-banner-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.opti-banner-heading {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  max-width: 600px;
}

/* EXPERT PAGE STYLES */
.opti-expert-hero {
  padding: var(--visio-pad-scale) 2rem 3rem 2rem;
  background: var(--visio-stage-gradient);
  text-align: center;
}

.opti-expert-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.opti-split-expert {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-dark-canvas);
}

.opti-split-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 3rem;
  align-items: center;
}

.opti-split-text {
  flex: 0 0 55%;
}

.opti-split-media {
  flex: 0 0 45%;
}

.opti-media-frame {
  border-radius: var(--visio-radius-soft);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border: 2px solid var(--visio-surface-mid);
}

.opti-img-cover {
  width: 100%;
  height: auto;
  display: block;
}

.opti-stats-row-section {
  background: var(--visio-surface-dark);
  padding: 4rem 2rem;
}

.opti-stats-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.opti-stat-number {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--visio-vivid-teal);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.opti-stat-label {
  font-size: 0.95rem;
  color: var(--visio-text-muted);
  font-weight: 500;
}

.opti-bg3-finish {
  background: url('img/bg3.webp') center/cover no-repeat;
  padding: var(--visio-pad-scale) 2rem;
}

.opti-bg3-overlay {
  max-width: 900px;
  margin: 0 auto;
  background: rgba(11, 19, 43, 0.9);
  padding: 3rem;
  border-radius: var(--visio-radius-soft);
  border: 1px solid rgba(255,255,255,0.1);
}

/* RESERVE PAGE STYLES */
.opti-reserve-hero {
  padding: 4rem 2rem 2rem 2rem;
  background: var(--visio-stage-gradient);
  text-align: center;
}

.opti-reserve-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.opti-form-info-section {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-dark-canvas);
}

.opti-split-form-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 3rem;
}

.opti-form-column {
  flex: 0 0 60%;
}

.opti-cards-column {
  flex: 0 0 40%;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.opti-interactive-form {
  background: var(--visio-surface-dark);
  padding: 2.5rem;
  border-radius: var(--visio-radius-soft);
  border: 1px solid var(--visio-surface-mid);
}

.opti-form-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--visio-vivid-teal);
}

.opti-field-group {
  margin-bottom: 1.2rem;
}

.opti-field-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.opti-field-group input,
.opti-field-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--visio-dark-canvas);
  border: 1px solid var(--visio-surface-mid);
  border-radius: 8px;
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 1rem;
}

.opti-field-group input:focus,
.opti-field-group textarea:focus {
  outline: none;
  border-color: var(--visio-vivid-teal);
}

.opti-checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--visio-text-muted);
}

.opti-checkbox-row input {
  margin-top: 0.2rem;
}

.opti-checkbox-row a {
  color: var(--visio-vivid-teal);
  text-decoration: underline;
}

.opti-btn-block {
  width: 100%;
}

.opti-mailto-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--visio-text-muted);
  text-align: center;
}

.opti-mail-link {
  color: var(--visio-accent-cyan);
  font-weight: 600;
}

.opti-info-box {
  background: var(--visio-surface-dark);
  padding: 1.8rem;
  border-radius: var(--visio-radius-soft);
  border-left: 4px solid var(--visio-accent-cyan);
}

.opti-box-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.opti-box-ico {
  width: 24px;
  height: 24px;
  color: var(--visio-accent-cyan);
}

.opti-box-header h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
}

.opti-box-text {
  font-size: 0.9rem;
  color: var(--visio-text-muted);
  margin-bottom: 1rem;
}

.opti-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.opti-bullet-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.88rem;
}

.opti-dot-badge {
  width: 22px;
  height: 22px;
  background: var(--visio-vivid-teal);
  color: var(--visio-dark-canvas);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.opti-faq-container {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-surface-dark);
}

.opti-faq-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.opti-faq-stack {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.opti-faq-card {
  background: var(--visio-dark-canvas);
  padding: 1.5rem 1.8rem;
  border-radius: var(--visio-radius-soft);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.opti-faq-q {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--visio-vivid-teal);
  margin-bottom: 0.5rem;
}

.opti-faq-a {
  font-size: 0.95rem;
  color: var(--visio-text-muted);
}

/* THANK YOU PAGE */
.opti-thank-stage {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-stage-gradient);
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.opti-thank-wrapper {
  max-width: 700px;
  width: 100%;
}

.opti-thank-card {
  background: var(--visio-surface-dark);
  padding: 3rem;
  border-radius: var(--visio-radius-soft);
  text-align: center;
  border: 1px solid var(--visio-surface-mid);
}

.opti-badge-check {
  width: 60px;
  height: 60px;
  background: var(--visio-vivid-teal);
  color: var(--visio-dark-canvas);
  border-radius: 50%;
  font-size: 2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem auto;
}

.opti-image-holder {
  margin-top: 1.5rem;
  border-radius: var(--visio-radius-soft);
  overflow: hidden;
  max-height: 250px;
}

.opti-thank-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* LEGAL PAGES */
.opti-legal-page {
  padding: var(--visio-pad-scale) 2rem;
  background: var(--visio-dark-canvas);
  min-height: 100vh;
}

.opti-legal-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.opti-cookie-policy-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--visio-surface-mid);
}

/* FOOTER PRESET C */
.opti-bottom-dock {
  background: #040814;
  color: var(--visio-text-muted);
  padding: 3rem 2rem 2rem 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.opti-footer-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

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

.opti-legal-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.opti-legal-links a:hover {
  color: var(--visio-vivid-teal);
}

.opti-disclaimer-text {
  font-size: 0.8rem;
  line-height: 1.5;
  color: #7A8B9E;
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.opti-copyright-line {
  font-size: 0.8rem;
  text-align: center;
  color: #556575;
}

/* COOKIE BANNER */
.opti-cookie-pop {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: #121A2D;
  border-top: 2px solid var(--visio-vivid-teal);
  box-shadow: 0 -10px 30px rgba(0,0,0,0.5);
  padding: 1.2rem 2rem;
}

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

.opti-cookie-content p {
  font-size: 0.9rem;
  color: var(--visio-text-pure);
  flex: 1;
}

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

.opti-cookie-btn {
  padding: 0.5rem 1.4rem;
  border-radius: var(--visio-radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  border: none;
}

.opti-btn-ok {
  background: var(--visio-vivid-teal);
  color: var(--visio-dark-canvas);
}

.opti-btn-no {
  background: transparent;
  color: var(--visio-text-muted);
  border: 1px solid var(--visio-surface-mid);
}

/* RESPONSIVE DESIGN */
@media (max-width: 992px) {
  .opti-stage-wrapper,
  .opti-split-wrapper,
  .opti-split-form-grid {
    flex-direction: column;
  }

  .opti-split-text,
  .opti-split-media,
  .opti-form-column,
  .opti-cards-column {
    flex: 1 1 100%;
    width: 100%;
  }

  .opti-shape-graphic {
    display: none;
  }

  .opti-steps-row {
    grid-template-columns: 1fr;
  }

  .opti-connector-line {
    display: none;
  }
}

@media (max-width: 768px) {
  .opti-burger-trigger {
    display: flex;
  }

  .opti-navigation-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--visio-surface-dark);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
  }

  .opti-check-drawer:checked ~ .opti-navigation-links {
    display: flex;
  }

  .opti-banner-wrapper {
    flex-direction: column;
    text-align: center;
  }

  .opti-footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
}