/* style.css - Clean Dark Premium Theme for Eye Wellness Education */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Oswald:wght@400;500;600;700&display=swap');

:root {
  --opti-bg: #0b0d13;
  --opti-surface: #141824;
  --opti-surface-elevated: #1e2334;
  --opti-tone: #d4af37;
  --opti-tone-hover: #f3cf65;
  --opti-ink: #f8fafc;
  --opti-ink-muted: #94a3b8;
  --opti-border: rgba(212, 175, 55, 0.15);
  --opti-gradient: linear-gradient(135deg, #141824 0%, #0b0d13 100%);
  --opti-accent-gradient: linear-gradient(135deg, #d4af37 0%, #a88414 100%);
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  --opti-radius: 14px;
  --opti-shadow-normal: 0 8px 30px rgba(0, 0, 0, 0.5);
  --opti-shadow-deep: 0 15px 40px rgba(0, 0, 0, 0.7);
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background-color: var(--opti-bg);
  color: var(--opti-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

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

button, input, textarea {
  font-family: inherit;
}

/* Header Styling */
.opti-main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--opti-surface);
  border-bottom: 1px solid var(--opti-border);
  box-shadow: var(--opti-shadow-normal);
}

.opti-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.opti-brand-holder {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.opti-brand-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--opti-ink);
}

.opti-brand-icon {
  width: 32px;
  height: 32px;
  fill: var(--opti-tone);
}

/* CSS Only Burger Menu */
.opti-burger-checkbox {
  display: none;
}

.opti-burger-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1002;
}

.opti-burger-line {
  width: 28px;
  height: 3px;
  background-color: var(--opti-ink);
  transition: all 0.3s ease;
  border-radius: 2px;
}

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

.opti-nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--opti-ink-muted);
  position: relative;
  padding: 0.5rem 0;
}

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

.opti-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--opti-tone);
  transition: width 0.3s ease;
}

.opti-nav-link:hover::after, .opti-nav-link.active::after {
  width: 100%;
}

/* Action button style */
.opti-action-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  background: var(--opti-accent-gradient);
  color: #000;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: 1px;
  text-transform: uppercase;
  border: none;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(214, 175, 55, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  cursor: pointer;
}

.opti-action-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(214, 175, 55, 0.5);
}

/* Hero Section Base */
.opti-hero-canvas {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10dvh 1.5rem;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.opti-hero-canvas::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 13, 19, 0.75);
  z-index: 1;
}

.opti-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
  text-align: center;
}

.opti-hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  color: var(--opti-ink);
  letter-spacing: 1px;
}

.opti-hero-heading span {
  color: var(--opti-tone);
}

.opti-hero-desc {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--opti-ink-muted);
  margin-bottom: 2.5rem;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

/* Floating Stat Bar sticky underneath Hero */
.opti-stat-strip {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: -60px auto 4rem auto;
  padding: 1.5rem;
  background-color: var(--opti-surface-elevated);
  border-radius: var(--opti-radius);
  border: 1px solid var(--opti-border);
  box-shadow: var(--opti-shadow-deep);
}

.opti-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  text-align: center;
}

.opti-stat-box {
  padding: 1rem;
}

.opti-stat-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  color: var(--opti-tone);
  font-weight: 700;
  margin-bottom: 0.2rem;
  line-height: 1;
}

.opti-stat-lbl {
  font-size: 0.9rem;
  color: var(--opti-ink-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Zigzag Content Panels */
.opti-zigzag-canvas {
  padding: 10dvh 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.opti-zigzag-panel {
  display: flex;
  align-items: center;
  gap: 4rem;
  margin-bottom: 8rem;
}

.opti-zigzag-panel:last-child {
  margin-bottom: 0;
}

.opti-zigzag-panel:nth-child(even) {
  flex-direction: row-reverse;
}

.opti-zigzag-photo {
  flex: 1;
  min-height: 400px;
  border-radius: var(--opti-radius);
  background-size: cover;
  background-position: center;
  box-shadow: var(--opti-shadow-normal);
  position: relative;
  overflow: hidden;
}

/* Diagonal clip-path styling for photos */
.opti-zigzag-panel:nth-child(odd) .opti-zigzag-photo {
  clip-path: polygon(0 0, 95% 0, 100% 100%, 0% 100%);
}

.opti-zigzag-panel:nth-child(even) .opti-zigzag-photo {
  clip-path: polygon(5% 0, 100% 0, 100% 100%, 0% 100%);
}

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

.opti-zigzag-tag {
  color: var(--opti-tone);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 1rem;
  margin-bottom: 0.8rem;
  display: block;
}

.opti-zigzag-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.opti-zigzag-text {
  color: var(--opti-ink-muted);
  margin-bottom: 1.5rem;
}

/* Features Grid */
.opti-perks-canvas {
  background-color: var(--opti-surface);
  padding: 10dvh 1.5rem;
  border-top: 1px solid var(--opti-border);
  border-bottom: 1px solid var(--opti-border);
}

.opti-perks-holder {
  max-width: 1200px;
  margin: 0 auto;
}

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

.opti-section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.opti-section-intro {
  color: var(--opti-ink-muted);
  max-width: 600px;
  margin: 0 auto;
}

.opti-perks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.opti-perk-item {
  background-color: var(--opti-bg);
  padding: 2.5rem;
  border-radius: var(--opti-radius);
  border-left: 4px solid var(--opti-tone);
  box-shadow: var(--opti-shadow-normal);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.opti-perk-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--opti-shadow-deep);
}

.opti-perk-icon-wrap {
  margin-bottom: 1.5rem;
}

.opti-perk-icon {
  width: 40px;
  height: 40px;
  fill: var(--opti-tone);
}

.opti-perk-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.opti-perk-detail {
  color: var(--opti-ink-muted);
}

/* Timeline Routine */
.opti-timeline-canvas {
  padding: 10dvh 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.opti-time-track {
  position: relative;
  padding: 2rem 0;
}

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

.opti-time-node {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 4rem;
  position: relative;
}

.opti-time-node:last-child {
  margin-bottom: 0;
}

.opti-node-spot {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background-color: var(--opti-surface-elevated);
  border: 2px solid var(--opti-tone);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: bold;
  color: var(--opti-tone);
  z-index: 5;
}

.opti-node-content {
  width: 44%;
  background-color: var(--opti-surface);
  padding: 2rem;
  border-radius: var(--opti-radius);
  box-shadow: var(--opti-shadow-normal);
  border: 1px solid var(--opti-border);
}

.opti-time-node:nth-child(even) {
  flex-direction: row-reverse;
}

.opti-node-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  color: var(--opti-tone);
}

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

/* CTA Strip */
.opti-banner-canvas {
  position: relative;
  padding: 12dvh 1.5rem;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  text-align: center;
}

.opti-banner-canvas::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 13, 19, 0.8);
}

.opti-banner-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

/* Expert Page Custom Layouts */
.opti-bio-row {
  display: flex;
  align-items: center;
  gap: 4rem;
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

.opti-bio-image {
  flex: 1;
  min-height: 500px;
  border-radius: var(--opti-radius);
  background-size: cover;
  background-position: center;
}

.opti-bio-words {
  flex: 1.2;
}

/* Booking Registration Form */
.opti-lead-system {
  padding: 8dvh 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.opti-lead-box {
  background-color: var(--opti-surface);
  border-radius: var(--opti-radius);
  padding: 3rem;
  border: 1px solid var(--opti-border);
  box-shadow: var(--opti-shadow-deep);
  max-width: 600px;
  margin: 0 auto;
}

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

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

.opti-input-label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--opti-ink-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.5px;
}

.opti-input-field {
  width: 100%;
  background-color: var(--opti-bg);
  border: 1px solid var(--opti-border);
  padding: 1rem 1.2rem;
  border-radius: 8px;
  color: var(--opti-ink);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

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

.opti-form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
  cursor: pointer;
}

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

.opti-form-button {
  width: 100%;
}

.opti-mail-link {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  color: var(--opti-tone);
  font-weight: 500;
}

.opti-mail-link:hover {
  text-decoration: underline;
}

/* FAQ Accordion Styling (Reserve Page) */
.opti-faq-canvas {
  max-width: 800px;
  margin: 6rem auto 2rem auto;
  padding: 0 1.5rem;
}

.opti-faq-item {
  background-color: var(--opti-surface);
  border-radius: var(--opti-radius);
  border: 1px solid var(--opti-border);
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  box-shadow: var(--opti-shadow-normal);
}

.opti-faq-q {
  font-family: var(--font-display);
  font-size: 1.2rem;
  text-transform: uppercase;
  color: var(--opti-tone);
  margin-bottom: 0.8rem;
}

.opti-faq-a {
  color: var(--opti-ink-muted);
}

/* Legal Documents and General Layouts */
.opti-text-document {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

.opti-text-document h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  text-transform: uppercase;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--opti-border);
  padding-bottom: 0.5rem;
}

.opti-text-document h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  text-transform: uppercase;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.opti-text-document p {
  color: var(--opti-ink-muted);
  margin-bottom: 1.5rem;
}

/* Footer Section styling */
.opti-footer-canvas {
  background-color: #080a0e;
  border-top: 1px solid var(--opti-border);
  padding: 4rem 1.5rem 2rem 1.5rem;
}

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

.opti-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--opti-border);
}

.opti-footer-logo-panel {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.opti-disclaimer {
  max-width: 700px;
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  border-left: 2px solid var(--opti-tone);
  padding-left: 1rem;
}

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

.opti-copyright {
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
}

.opti-legal-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.opti-legal-link {
  font-size: 0.85rem;
  color: var(--opti-ink-muted);
}

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

/* Cookie Banner styling */
.opti-cookie-strip {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--opti-surface-elevated);
  border-top: 1px solid var(--opti-border);
  padding: 1.2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  z-index: 9999;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.8);
  transition: opacity 0.5s ease;
}

.opti-cookie-text {
  font-size: 0.9rem;
  color: var(--opti-ink-muted);
  max-width: 800px;
}

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

.opti-cookie-btn-ok {
  background-color: var(--opti-tone);
  color: #000;
  font-family: var(--font-display);
  font-weight: 600;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  cursor: pointer;
  text-transform: uppercase;
}

.opti-cookie-btn-no {
  background-color: transparent;
  color: var(--opti-ink-muted);
  border: 1px solid var(--opti-border);
  font-family: var(--font-display);
  font-weight: 500;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  cursor: pointer;
  text-transform: uppercase;
}

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

.opti-numbered-list {
  margin-top: 1rem;
}

.opti-numbered-list li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: var(--opti-ink-muted);
  margin-bottom: 0.5rem;
}

.opti-number-dot {
  width: 20px;
  height: 20px;
  background-color: var(--opti-tone);
  color: #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .opti-zigzag-panel {
    flex-direction: column !important;
    gap: 2rem;
  }
  .opti-zigzag-photo {
    width: 100%;
    min-height: 300px;
    clip-path: none !important;
  }
}

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

  .opti-nav-bar {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--opti-surface);
    flex-direction: column;
    padding: 3rem 1.5rem;
    gap: 2rem;
    transition: left 0.3s ease;
    border-top: 1px solid var(--opti-border);
  }

  .opti-burger-checkbox:checked ~ .opti-nav-bar {
    left: 0;
  }

  .opti-burger-checkbox:checked ~ .opti-burger-btn .opti-burger-line:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  .opti-burger-checkbox:checked ~ .opti-burger-btn .opti-burger-line:nth-child(2) {
    opacity: 0;
  }

  .opti-burger-checkbox:checked ~ .opti-burger-btn .opti-burger-line:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .opti-time-track::before {
    left: 20px;
  }

  .opti-time-node {
    flex-direction: column !important;
    align-items: flex-start;
    padding-left: 50px;
  }

  .opti-node-spot {
    left: 20px;
    transform: translate(-50%, -10px);
  }

  .opti-node-content {
    width: 100%;
  }

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

  .opti-bio-row {
    flex-direction: column;
  }

  .opti-bio-image {
    width: 100%;
    min-height: 350px;
  }
}