:root {
  --opti-bg-dark: #080f18;
  --opti-surface-dark: #111c2a;
  --opti-surface-bright: #1a293c;
  --opti-tone-accent: #00d2c8;
  --opti-tone-accent-hover: #00b3aa;
  --opti-tone-gold: #f2b84b;
  --opti-ink-bright: #f0f6fc;
  --opti-ink-muted: #9bb0c1;
  --opti-border-color: rgba(0, 210, 200, 0.22);
  --opti-shadow-elevated: 0 16px 36px rgba(0, 0, 0, 0.45);
  --opti-gradient-glow: linear-gradient(135deg, #00d2c8 0%, #0077b6 100%);
  --opti-gradient-dark: linear-gradient(180deg, rgba(8, 15, 24, 0.82) 0%, rgba(8, 15, 24, 0.96) 100%);
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --scale-padding: 10dvh;
  --radius-soft: 16px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--opti-bg-dark);
  color: var(--opti-ink-bright);
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

/* Scroll Progress Bar */
.opti-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--opti-gradient-glow);
  width: 100%;
  transform-origin: 0 50%;
  z-index: 10000;
  animation: optiProgress linear;
  animation-timeline: scroll();
}

@keyframes optiProgress {
  0% { transform: scaleX(0); }
  100% { transform: scaleX(1); }
}

/* Scroll Animations */
.opti-view-reveal {
  animation: optiFadeIn auto linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 30%;
}

@keyframes optiFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--opti-ink-bright);
}

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

/* Header Component */
.opti-head-frame {
  position: sticky;
  top: 0;
  background-color: var(--opti-surface-dark);
  border-bottom: 1px solid var(--opti-border-color);
  z-index: 9000;
  padding: 1rem 5%;
}

.opti-head-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.opti-brand-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--opti-tone-accent);
}

.opti-brand-icon {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: var(--opti-tone-accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.opti-nav-bar {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.opti-nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

.opti-nav-link:hover {
  color: var(--opti-tone-accent);
}

#opti-nav-check {
  display: none;
}

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

.opti-menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--opti-ink-bright);
  border-radius: 2px;
}

/* Button Styles */
.opti-pill-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2.2rem;
  border-radius: 999px;
  background: var(--opti-gradient-glow);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 210, 200, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.opti-pill-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 210, 200, 0.5);
}

/* Hero Section */
.opti-hero-stage {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url('img/bg.webp');
  background-size: cover;
  background-position: center;
  text-align: center;
  padding: 4rem 1.5rem 8rem 1.5rem;
}

.opti-hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--opti-gradient-dark);
  z-index: 1;
}

.opti-hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.opti-hero-heading {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.opti-hero-sub {
  font-size: 1.15rem;
  color: var(--opti-ink-muted);
  margin-bottom: 2.5rem;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
}

/* Floating Stat Bridge */
.opti-stat-bridge {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: -60px auto 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.opti-stat-card {
  background-color: var(--opti-surface-dark);
  border: 1px solid var(--opti-border-color);
  border-radius: var(--radius-soft);
  padding: 1.8rem 1.5rem;
  text-align: center;
  box-shadow: var(--opti-shadow-elevated);
}

.opti-stat-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--opti-tone-accent);
  margin-bottom: 0.3rem;
}

.opti-stat-label {
  font-size: 0.9rem;
  color: var(--opti-ink-muted);
}

/* General Section Layout */
.opti-section-block {
  padding: var(--scale-padding) 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.opti-section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  text-align: center;
  margin-bottom: 1rem;
}

.opti-section-desc {
  text-align: center;
  color: var(--opti-ink-muted);
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
  font-size: 1.05rem;
}

/* Content Zigzag */
.opti-zigzag-holder {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.opti-zigzag-row {
  display: flex;
  align-items: center;
  gap: 3rem;
}

.opti-zigzag-row.reverse {
  flex-direction: row-reverse;
}

.opti-zigzag-media {
  flex: 1;
  min-height: 350px;
  position: relative;
}

.opti-zigzag-pic {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-soft);
  border: 1px solid var(--opti-border-color);
}

.opti-slanted-right {
  clip-path: polygon(0 0, 100% 0, 92% 100%, 0% 100%);
}

.opti-slanted-left {
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0% 100%);
}

.opti-zigzag-text {
  flex: 1;
}

.opti-zigzag-text h3 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: var(--opti-tone-gold);
}

.opti-zigzag-text p {
  color: var(--opti-ink-muted);
  margin-bottom: 1rem;
}

/* Features Grid */
.opti-feat-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.opti-feat-box {
  background-color: var(--opti-surface-dark);
  border-left: 4px solid var(--opti-tone-accent);
  border-radius: var(--radius-soft);
  padding: 2rem;
  box-shadow: var(--opti-shadow-elevated);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.opti-feat-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.opti-feat-icon {
  width: 42px;
  height: 42px;
  stroke: var(--opti-tone-accent);
  stroke-width: 2;
  fill: none;
  margin-bottom: 1.2rem;
}

.opti-feat-box h4 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
}

.opti-feat-box p {
  font-size: 0.95rem;
  color: var(--opti-ink-muted);
}

/* Vertical Timeline */
.opti-timeline-track {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.opti-timeline-track::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--opti-border-color);
  transform: translateX(-50%);
}

.opti-timeline-item {
  position: relative;
  margin-bottom: 3rem;
  display: flex;
  justify-content: flex-end;
  width: 50%;
  padding-right: 2.5rem;
}

.opti-timeline-item:nth-child(even) {
  align-self: flex-end;
  margin-left: 50%;
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 2.5rem;
}

.opti-node-badge {
  position: absolute;
  top: 0;
  right: -20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--opti-tone-accent);
  color: var(--opti-bg-dark);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.opti-timeline-item:nth-child(even) .opti-node-badge {
  right: auto;
  left: -20px;
}

.opti-timeline-card {
  background: var(--opti-surface-bright);
  padding: 1.5rem;
  border-radius: var(--radius-soft);
  border: 1px solid var(--opti-border-color);
}

/* CTA Banner Strip */
.opti-banner-fixed {
  position: relative;
  background-image: url('img/bg.webp');
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  padding: 6rem 1.5rem;
  text-align: center;
}

.opti-banner-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 15, 24, 0.88);
}

.opti-banner-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

/* Forms & Cards (Reserve page) */
.opti-form-shell {
  max-width: 600px;
  margin: 0 auto;
  background: var(--opti-surface-dark);
  padding: 2.5rem;
  border-radius: var(--radius-soft);
  border: 1px solid var(--opti-border-color);
  box-shadow: var(--opti-shadow-elevated);
}

.opti-field-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.opti-field-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--opti-ink-bright);
}

.opti-field-group input,
.opti-field-group textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  background: var(--opti-bg-dark);
  border: 1px solid var(--opti-border-color);
  border-radius: 8px;
  color: var(--opti-ink-bright);
  font-family: inherit;
  font-size: 0.95rem;
}

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

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

.opti-check-row input {
  margin-top: 3px;
}

/* FAQ Accordion (CSS Only) */
.opti-faq-accordion {
  max-width: 800px;
  margin: 3rem auto 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.opti-faq-item {
  background: var(--opti-surface-dark);
  border: 1px solid var(--opti-border-color);
  border-radius: var(--radius-soft);
  padding: 1.5rem;
}

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

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

/* Info Cards Block */
.opti-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.opti-info-card {
  background: var(--opti-surface-dark);
  padding: 2rem;
  border-radius: var(--radius-soft);
  border: 1px solid var(--opti-border-color);
}

.opti-num-list {
  list-style: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.opti-num-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: var(--opti-ink-muted);
}

.opti-badge-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0, 210, 200, 0.2);
  color: var(--opti-tone-accent);
  font-weight: 700;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Cookie Banner */
.opti-cookie-frame {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--opti-surface-bright);
  border-top: 2px solid var(--opti-tone-accent);
  padding: 1.5rem;
  z-index: 9999;
  box-shadow: 0 -10px 30px rgba(0,0,0,0.5);
  display: none;
}

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

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

.opti-btn-sm {
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border: none;
}

.opti-btn-accept {
  background: var(--opti-tone-accent);
  color: var(--opti-bg-dark);
}

.opti-btn-decline {
  background: transparent;
  color: var(--opti-ink-bright);
  border: 1px solid var(--opti-border-color);
}

/* Footer */
.opti-foot-frame {
  background-color: var(--opti-surface-dark);
  border-top: 1px solid var(--opti-border-color);
  padding: 4rem 1.5rem 2rem 1.5rem;
  margin-top: 4rem;
}

.opti-foot-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.opti-foot-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

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

.opti-foot-disclaimer {
  padding: 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
  text-align: center;
  border: 1px dashed var(--opti-border-color);
}

.opti-foot-copy {
  text-align: center;
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
}

/* Responsive Styles */
@media (max-width: 900px) {
  .opti-zigzag-row,
  .opti-zigzag-row.reverse {
    flex-direction: column;
  }
  
  .opti-slanted-right,
  .opti-slanted-left {
    clip-path: none;
  }
  
  .opti-timeline-track::before {
    left: 20px;
  }

  .opti-timeline-item,
  .opti-timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding-left: 3.5rem;
    padding-right: 0;
  }

  .opti-node-badge,
  .opti-timeline-item:nth-child(even) .opti-node-badge {
    left: 0;
    right: auto;
  }

  .opti-cookie-inner {
    flex-direction: column;
    text-align: center;
  }
}

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

  .opti-nav-bar {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--opti-surface-dark);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    display: none;
    border-bottom: 1px solid var(--opti-border-color);
  }

  #opti-nav-check:checked ~ .opti-nav-bar {
    display: flex;
  }
}