:root {
  --sight-bg-base: #0f172a;
  --sight-bg-surface: #1e293b;
  --sight-bg-light: #f8fafc;
  --sight-color-primary: #6366f1;
  --sight-color-secondary: #0ea5e9;
  --sight-color-accent: #f59e0b;
  --sight-color-accent-vivid: #ec4899;
  --sight-text-light: #f8fafc;
  --sight-text-dark: #0f172a;
  --sight-text-muted: #64748b;
  --sight-gradient-hero: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
  --sight-gradient-dark: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  --sight-font-display: 'Montserrat', sans-serif;
  --sight-font-body: 'Inter', sans-serif;
  
  --sight-pad-compact: 6dvh;
  --sight-pad-normal: 10dvh;
  --sight-pad-spacious: 16dvh;
  
  --sight-radius-soft: 16px;
  --sight-radius-pill: 999px;
  
  --sight-shadow-raised: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --sight-shadow-glow: 0 0 20px rgba(99, 102, 241, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--sight-font-body);
  background-color: var(--sight-bg-light);
  color: var(--sight-text-dark);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--sight-font-display);
  text-transform: uppercase;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.025em;
}

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

/* Header & Menu design */
.opt-global-header {
  background-color: var(--sight-color-primary);
  color: var(--sight-text-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--sight-shadow-raised);
}

.opt-scroll-indicator {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background-color: var(--sight-color-accent);
  width: 0%;
  z-index: 10001;
  animation: opt-scroll-growth linear;
  animation-timeline: scroll();
}

@keyframes opt-scroll-growth {
  to { width: 100%; }
}

.opt-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.opt-brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.25rem;
  font-family: var(--sight-font-display);
}

.opt-brand-wrap svg {
  fill: currentColor;
  width: 32px;
  height: 32px;
}

/* Burger Menu CSS-only */
.opt-menu-check {
  display: none;
}

.opt-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1002;
}

.opt-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--sight-text-light);
  border-radius: 3px;
  transition: 0.3s ease;
}

.opt-nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.opt-nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.opt-nav-link:hover, .opt-nav-link.active {
  border-bottom-color: var(--sight-color-accent);
}

@media (max-width: 768px) {
  .opt-menu-btn {
    display: flex;
  }
  
  .opt-nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--sight-bg-surface);
    flex-direction: column;
    padding: 5rem 2rem;
    gap: 1.5rem;
    box-shadow: -5px 0 15px rgba(0,0,0,0.3);
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  .opt-menu-check:checked ~ .opt-nav-list {
    right: 0;
  }

  .opt-menu-check:checked ~ .opt-menu-btn span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .opt-menu-check:checked ~ .opt-menu-btn span:nth-child(2) {
    opacity: 0;
  }

  .opt-menu-check:checked ~ .opt-menu-btn span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* Hero Section (Preset C) */
.opt-hero-gradient {
  background: var(--sight-gradient-hero);
  color: var(--sight-text-light);
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: var(--sight-pad-normal) 1.5rem;
}

.opt-hero-num-bg {
  position: absolute;
  right: -5%;
  bottom: -5%;
  font-size: 24rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
  font-family: var(--sight-font-display);
  line-height: 1;
  pointer-events: none;
  z-index: 1;
}

.opt-hero-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.opt-hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.opt-hero-tag {
  background-color: var(--sight-color-accent);
  color: var(--sight-text-dark);
  font-weight: 800;
  padding: 0.5rem 1rem;
  border-radius: var(--sight-radius-soft);
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.opt-hero-title {
  font-size: clamp(2.5rem, 6dvw, 4.5rem);
  margin-bottom: 1.5rem;
  color: var(--sight-text-light);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.opt-hero-desc {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 600px;
}

.opt-pill-button {
  background-color: var(--sight-color-accent);
  color: var(--sight-text-dark);
  padding: 1rem 2.5rem;
  border-radius: var(--sight-radius-pill);
  font-family: var(--sight-font-display);
  font-weight: 800;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  box-shadow: var(--sight-shadow-raised);
  transform: scale(1);
}

.opt-pill-button:hover {
  transform: translateY(-3px);
  background-color: #ffffff;
  color: var(--sight-color-primary);
  box-shadow: var(--sight-shadow-glow);
}

.opt-abstract-shapes {
  position: relative;
  height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.opt-shape-circle {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--sight-color-accent-vivid) 0%, transparent 70%);
  opacity: 0.6;
  animation: float-shapes 6s ease-in-out infinite alternate;
}

.opt-shape-square {
  position: absolute;
  width: 150px;
  height: 150px;
  border: 12px solid var(--sight-color-accent);
  border-radius: var(--sight-radius-soft);
  transform: rotate(45deg);
  opacity: 0.4;
  animation: float-shapes-alt 8s ease-in-out infinite alternate;
}

@keyframes float-shapes {
  0% { transform: translateY(-20px) rotate(0deg); }
  100% { transform: translateY(20px) rotate(15deg); }
}

@keyframes float-shapes-alt {
  0% { transform: translateY(20px) rotate(45deg); }
  100% { transform: translateY(-20px) rotate(85deg); }
}

@media (max-width: 992px) {
  .opt-hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .opt-hero-content {
    align-items: center;
  }
  .opt-abstract-shapes {
    display: none;
  }
}

/* Scroll-driven Reveal */
.opt-scroll-reveal {
  animation: opt-reveal-anim 1s linear both;
  animation-timeline: view();
  animation-range: entry 10% entry 40%;
}

@keyframes opt-reveal-anim {
  from { opacity: 0; transform: translateY(50px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Diagonal Separator (Preset C Content) */
.opt-diagonal-section {
  background: var(--sight-gradient-dark);
  color: var(--sight-text-light);
  padding: 8rem 1.5rem;
  clip-path: polygon(0 6dvh, 100% 0, 100% calc(100% - 6dvh), 0 100%);
  position: relative;
}

.opt-diagonal-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.opt-diagonal-media {
  flex: 1;
}

.opt-diagonal-img {
  width: 100%;
  height: 450px;
  object-fit: cover;
  border-radius: var(--sight-radius-soft);
  box-shadow: var(--sight-shadow-raised);
}

.opt-diagonal-content {
  flex: 1.2;
  background-color: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(10px);
  padding: 3rem;
  border-radius: var(--sight-radius-soft);
  border: 1px solid rgba(255,255,255,0.1);
}

.opt-diagonal-title {
  font-size: 2.2rem;
  color: var(--sight-color-accent);
  margin-bottom: 1.5rem;
}

.opt-diagonal-text {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

@media (max-width: 992px) {
  .opt-diagonal-section {
    clip-path: none;
    padding: var(--sight-pad-normal) 1.5rem;
  }
  .opt-diagonal-inner {
    flex-direction: column;
  }
}

/* Features Block: 3-column with Big numbers (Preset C) */
.opt-features-section {
  padding: var(--sight-pad-normal) 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.opt-section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.opt-section-label {
  color: var(--sight-color-primary);
  font-weight: 800;
  letter-spacing: 0.1em;
  font-size: 1rem;
  margin-bottom: 0.5rem;
  display: block;
}

.opt-section-title {
  font-size: 2.5rem;
}

.opt-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.opt-feature-card {
  padding: 2.5rem;
  background-color: var(--sight-bg-light);
  border-radius: var(--sight-radius-soft);
  transition: transform 0.3s ease;
  position: relative;
}

.opt-feature-num {
  font-size: 4rem;
  font-weight: 900;
  color: var(--sight-color-primary);
  line-height: 1;
  margin-bottom: 1rem;
  font-family: var(--sight-font-display);
}

.opt-feature-title {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--sight-text-dark);
}

.opt-feature-desc {
  color: var(--sight-text-muted);
}

/* Timeline: How it works (Preset C) */
.opt-timeline-section {
  background-color: #f1f5f9;
  padding: var(--sight-pad-normal) 1.5rem;
}

.opt-timeline-wrap {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
}

.opt-timeline-track {
  display: flex;
  justify-content: space-between;
  position: relative;
  gap: 2rem;
}

.opt-timeline-track::before {
  content: '';
  position: absolute;
  top: 35px;
  left: 10%;
  right: 10%;
  height: 4px;
  background-color: var(--sight-color-primary);
  z-index: 1;
}

.opt-timeline-step {
  flex: 1;
  text-align: center;
  z-index: 2;
}

.opt-timeline-node {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: var(--sight-color-primary);
  color: var(--sight-text-light);
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 4px solid #ffffff;
  box-shadow: var(--sight-shadow-raised);
}

.opt-timeline-step:nth-child(even) .opt-timeline-node {
  background-color: transparent;
  color: var(--sight-color-primary);
  border-color: var(--sight-color-primary);
}

.opt-timeline-name {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.opt-timeline-desc {
  color: var(--sight-text-muted);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .opt-timeline-track {
    flex-direction: column;
    gap: 3rem;
  }
  .opt-timeline-track::before {
    top: 0;
    left: 35px;
    width: 4px;
    height: 80%;
  }
  .opt-timeline-step {
    display: flex;
    align-items: flex-start;
    text-align: left;
    gap: 1.5rem;
  }
  .opt-timeline-node {
    margin: 0;
    flex-shrink: 0;
  }
}

/* CTA strip (Preset C style) */
.opt-cta-strip {
  background-color: var(--sight-bg-base);
  color: var(--sight-text-light);
  padding: 5rem 1.5rem;
}

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

.opt-cta-left h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.opt-cta-left p {
  opacity: 0.8;
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .opt-cta-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* Expert Page Specific Styles */
.opt-expert-top {
  padding: var(--sight-pad-normal) 1.5rem;
  background-color: var(--sight-bg-surface);
  color: var(--sight-text-light);
  text-align: center;
}

.opt-stats-strip {
  max-width: 1200px;
  margin: -3rem auto 4rem;
  background: var(--sight-bg-light);
  color: var(--sight-text-dark);
  border-radius: var(--sight-radius-soft);
  box-shadow: var(--sight-shadow-raised);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 2.5rem;
  z-index: 10;
  position: relative;
}

.opt-stat-item {
  text-align: center;
  border-right: 1px solid #e2e8f0;
}

.opt-stat-item:last-child {
  border-right: none;
}

.opt-stat-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--sight-color-primary);
  line-height:1;
}

.opt-stat-label {
  color: var(--sight-text-muted);
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

@media (max-width: 768px) {
  .opt-stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: -1rem;
  }
  .opt-stat-item:nth-child(2) {
    border-right: none;
  }
}

/* Base Content Block */
.opt-columns-block {
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  display: flex;
  gap: 4rem;
  align-items: center;
}

.opt-col-text {
  flex: 1.2;
}

.opt-col-media {
  flex: 0.8;
}

.opt-media-frame img {
  width: 100%;
  border-radius: var(--sight-radius-soft);
  box-shadow: var(--sight-shadow-raised);
}

@media (max-width: 768px) {
  .opt-columns-block {
    flex-direction: column;
    gap: 2rem;
  }
}

/* Booking Layout (Preset C) */
.opt-reserve-container {
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 4rem;
}

.opt-form-holder {
  background: white;
  padding: 3rem;
  border-radius: var(--sight-radius-soft);
  box-shadow: var(--sight-shadow-raised);
}

.opt-form-group {
  margin-bottom: 1.5rem;
}

.opt-form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.opt-form-input {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: var(--sight-radius-soft);
  font-family: inherit;
  font-size: 1rem;
}

.opt-form-input:focus {
  outline: none;
  border-color: var(--sight-color-primary);
}

.opt-form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.opt-form-checkbox input {
  margin-top: 0.3rem;
}

.opt-form-submit {
  width: 100%;
  cursor: pointer;
  border: none;
}

.opt-info-cards-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.opt-info-mini-card {
  background-color: var(--sight-bg-light);
  padding: 1.5rem;
  border-radius: var(--sight-radius-soft);
  border-left: 5px solid var(--sight-color-primary);
}

.opt-info-mini-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.opt-info-list {
  list-style: none;
  margin-top: 0.75rem;
}

.opt-info-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.opt-info-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--sight-color-accent);
}

@media (max-width: 992px) {
  .opt-reserve-container {
    grid-template-columns: 1fr;
  }
}

/* FAQ Accordion (all items initially visible, CSS-only styled) */
.opt-faq-area {
  max-width: 800px;
  margin: 6rem auto;
  padding: 0 1.5rem;
}

.opt-faq-item {
  background: white;
  border-radius: var(--sight-radius-soft);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.opt-faq-q {
  font-size: 1.2rem;
  color: var(--sight-color-primary);
  margin-bottom: 0.5rem;
}

.opt-faq-a {
  color: var(--sight-text-muted);
}

/* Generic Pages template */
.opt-generic-pane {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  min-height: 70vh;
}

.opt-generic-pane h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.opt-generic-pane h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.opt-generic-pane p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

/* Thank you block */
.opt-thank-card {
  text-align: center;
  max-width: 600px;
  margin: 6rem auto;
  padding: 4rem 2rem;
  background-color: white;
  border-radius: var(--sight-radius-soft);
  box-shadow: var(--sight-shadow-raised);
}

.opt-thank-image {
  width: 100%;
  max-height: 250px;
  object-fit: cover;
  border-radius: var(--sight-radius-soft);
  margin-bottom: 2rem;
}

/* Global Footer */
.opt-footer-core {
  background-color: var(--sight-bg-base);
  color: var(--sight-text-light);
  padding: 4rem 1.5rem;
  border-top: 4px solid var(--sight-color-accent);
}

.opt-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.opt-footer-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.opt-footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.opt-footer-disc {
  font-size: 0.85rem;
  opacity: 0.6;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  line-height: 1.6;
}

.opt-footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
}

@media (max-width: 768px) {
  .opt-footer-main {
    flex-direction: column;
    text-align: center;
  }
  .opt-footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}

/* Cookie Consent Bar */
.opt-cookie-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--sight-bg-surface);
  color: var(--sight-text-light);
  padding: 1.5rem;
  z-index: 9999;
  box-shadow: 0 -10px 25px rgba(0,0,0,0.3);
  display: none;
}

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

.opt-cookie-btns {
  display: flex;
  gap: 1rem;
}

.opt-cookie-btn-acc {
  background-color: var(--sight-color-accent);
  color: var(--sight-text-dark);
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: var(--sight-radius-soft);
  font-weight: 700;
  cursor: pointer;
}

.opt-cookie-btn-dec {
  background-color: transparent;
  color: var(--sight-text-light);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 0.5rem 1.5rem;
  border-radius: var(--sight-radius-soft);
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 768px) {
  .opt-cookie-inner {
    flex-direction: column;
    text-align: center;
  }
}