:root {
  --view-bg: #FAFAFE;
  --view-surface: #FFFFFF;
  --view-tone: #2A70C2;
  --view-tone-hover: #1E5A9F;
  --view-ink: #1A1A2A;
  --view-dark: #0F172A;
  --view-gradient: linear-gradient(135deg, #2A70C2 0%, #30C3A2 100%);
  --view-overlay: linear-gradient(135deg, rgba(42,112,194,0.85) 0%, rgba(48,195,162,0.85) 100%);
  --view-light-gradient: linear-gradient(135deg, rgba(42,112,194,0.05) 0%, rgba(48,195,162,0.05) 100%);
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --pad-scale: 16dvh;
  --rad-soft: 16px;
  --rad-pill: 999px;
  --shadow-raised: 0 10px 25px rgba(26,26,42,0.08);
  --shadow-deep: 0 20px 40px rgba(26,26,42,0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-body); color: var(--view-ink); background: var(--view-bg); line-height: 1.6; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; color: var(--view-ink); margin-bottom: 1rem; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

.cornea-wrap { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 5%; }

/* Header Elements */
.sight-masthead { background: var(--view-gradient); color: var(--view-surface); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; box-shadow: var(--shadow-raised); }
.head-layout { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.brand-mark { display: flex; align-items: center; gap: 0.75rem; font-family: var(--font-display); font-weight: 800; font-size: 1.2rem; }
.brand-mark svg { width: 32px; height: 32px; fill: var(--view-surface); }
.sight-links { display: flex; gap: 2rem; }
.sight-links a { font-weight: 600; padding: 0.5rem 0; border-bottom: 2px solid transparent; transition: border-color 0.3s; }
.sight-links a:hover, .sight-links a.active-link { border-bottom-color: var(--view-surface); }

.trigger-check { display: none; }
.trigger-label { display: none; cursor: pointer; }
.trigger-label svg { fill: var(--view-surface); width: 28px; height: 28px; }

@media(max-width: 768px) {
  .trigger-label { display: block; }
  .sight-links { position: absolute; top: 80px; left: 0; right: 0; background: var(--view-gradient); flex-direction: column; gap: 0; max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
  .sight-links a { padding: 1rem 5%; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .trigger-check:checked ~ .sight-links { max-height: 300px; }
}

/* Core Typography & Elements */
.heading-alpha { font-size: 3.5rem; }
.heading-beta { font-size: 2.5rem; }
.body-lead { font-size: 1.25rem; opacity: 0.9; }

.action-trigger { display: inline-flex; align-items: center; justify-content: center; background: var(--view-surface); color: var(--view-tone); padding: 1rem 2.5rem; border-radius: var(--rad-pill); font-weight: 700; font-family: var(--font-display); transition: transform 0.3s, box-shadow 0.3s; cursor: pointer; border: none; text-align: center; }
.action-trigger:hover { transform: translateY(-2px); box-shadow: var(--shadow-raised); }
.action-trigger.dark { background: var(--view-dark); color: var(--view-surface); }

/* Index Hero */
.intro-stage { padding-top: 120px; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; background: var(--view-overlay), url('img/bg.webp') center/cover no-repeat; color: var(--view-surface); position: relative; }
.intro-stage .heading-alpha { color: var(--view-surface); max-width: 900px; margin: 0 auto 1.5rem; }
.intro-stage .body-lead { max-width: 700px; margin: 0 auto 2.5rem; }

.stats-flow { display: flex; gap: 3rem; margin-bottom: 3rem; flex-wrap: wrap; justify-content: center; }
.stat-item { display: flex; flex-direction: column; align-items: center; }
.stat-num { font-size: 2.5rem; font-weight: 800; font-family: var(--font-display); }
.stat-label { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; opacity: 0.9; }

.trust-stripe { margin-top: 4rem; display: flex; gap: 1rem; justify-content: center; align-items: center; opacity: 0.8; }
.trust-stripe svg { height: 24px; fill: currentColor; }
@media(max-width: 768px) {
  .intro-stage .heading-alpha { font-size: 2.5rem; }
}

/* Horizontal Scroll Track */
.knowledge-track { padding: var(--pad-scale) 0; background: linear-gradient(rgba(15,23,42,0.8), rgba(15,23,42,0.8)), url('img/bg2.webp') center/cover fixed; color: var(--view-surface); }
.knowledge-track .heading-beta { color: var(--view-surface); text-align: center; margin-bottom: 4rem; }
.track-ribbon { display: flex; gap: 2rem; }
.track-item { background: var(--view-surface); color: var(--view-ink); padding: 2.5rem; border-radius: var(--rad-soft); box-shadow: var(--shadow-deep); flex: 1; min-width: 300px; }
.track-icon { width: 48px; height: 48px; background: var(--view-light-gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; }
.track-icon svg { width: 24px; height: 24px; fill: var(--view-tone); }

@media(max-width: 900px) {
  .track-ribbon { overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 2rem; -webkit-overflow-scrolling: touch; }
  .track-item { scroll-snap-align: start; flex: 0 0 85%; }
}

/* Features Matrix */
.benefit-matrix { padding: var(--pad-scale) 0; background: var(--view-surface); }
.benefit-matrix .heading-beta { text-align: center; margin-bottom: 4rem; }
.matrix-layout { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.matrix-cell { background: var(--view-bg); padding: 2.5rem; border-radius: var(--rad-soft); transition: background 0.4s, color 0.4s; cursor: default; }
.matrix-cell:hover { background: var(--view-gradient); color: var(--view-surface); }
.matrix-cell:hover h3, .matrix-cell:hover p { color: var(--view-surface); }
.matrix-cell:hover .cell-icon { background: var(--view-surface); }
.matrix-cell:hover .cell-icon svg { fill: var(--view-tone); }
.cell-icon { width: 56px; height: 56px; background: var(--view-gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; transition: background 0.4s; }
.cell-icon svg { width: 28px; height: 28px; fill: var(--view-surface); transition: fill 0.4s; }

@media(max-width: 768px) {
  .matrix-layout { grid-template-columns: 1fr; }
}

/* Path Line */
.process-path { padding: var(--pad-scale) 0; background: var(--view-light-gradient); }
.process-path .heading-beta { text-align: center; margin-bottom: 5rem; }
.path-line { display: flex; justify-content: space-between; position: relative; max-width: 900px; margin: 0 auto; }
.path-line::before { content: ''; position: absolute; top: 32px; left: 0; right: 0; height: 4px; background: var(--view-tone); z-index: 1; }
.path-node { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; text-align: center; width: 30%; }
.node-circle { width: 64px; height: 64px; background: var(--view-surface); border: 4px solid var(--view-tone); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; color: var(--view-tone); margin-bottom: 1.5rem; }
.node-title { font-size: 1.25rem; font-weight: 700; }
@media(max-width: 768px) {
  .path-line { flex-direction: column; gap: 3rem; align-items: center; }
  .path-line::before { display: none; }
  .path-node { width: 100%; }
}

/* CTA */
.final-call { background: var(--view-gradient); padding: 6dvh 0; color: var(--view-surface); }
.call-layout { display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
.final-call .heading-beta { margin: 0; color: var(--view-surface); }
@media(max-width: 768px) {
  .call-layout { flex-direction: column; text-align: center; }
}

/* Expert Elements */
.expert-intro { padding: 140px 0 6dvh; background: var(--view-light-gradient); text-align: center; }
.split-view { display: flex; align-items: center; gap: 4rem; padding: var(--pad-scale) 0; }
.split-img { flex: 0 0 40%; }
.split-img img { border-radius: var(--rad-soft); box-shadow: var(--shadow-deep); width: 100%; }
.split-text { flex: 1; }
@media(max-width: 768px) { .split-view { flex-direction: column; } }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; padding: var(--pad-scale) 0; }
.stat-box { background: var(--view-surface); padding: 2rem; border-radius: var(--rad-soft); box-shadow: var(--shadow-raised); text-align: center; }
@media(max-width: 768px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }

/* Booking Elements */
.booking-stage { padding: 140px 0 var(--pad-scale); background: var(--view-bg); }
.booking-layout { display: flex; gap: 4rem; }
.booking-info { flex: 0 0 45%; position: sticky; top: 100px; align-self: flex-start; }
.booking-form-area { flex: 1; background: var(--view-surface); padding: 3rem; border-radius: var(--rad-soft); box-shadow: var(--shadow-deep); }
.form-field { margin-bottom: 1.5rem; }
.form-field label { display: block; margin-bottom: 0.5rem; font-weight: 600; font-size: 0.9rem; }
.form-field input, .form-field select { width: 100%; padding: 1rem; border: 1px solid rgba(26,26,42,0.1); border-radius: 8px; font-family: inherit; }
.form-field input:focus { outline: none; border-color: var(--view-tone); }
.policy-check { display: flex; gap: 0.5rem; align-items: flex-start; font-size: 0.85rem; }
.policy-check input { width: auto; margin-top: 4px; }

.bulleted-points { list-style: none; margin-top: 1rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.bulleted-points li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; font-weight: 600; }
.bulleted-points span { background: var(--view-gradient); color: #fff; width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-size: 0.75rem; font-family: var(--font-display); }

.faq-area { padding: var(--pad-scale) 0; }
.faq-area summary { padding: 1.5rem; background: var(--view-surface); margin-bottom: 1rem; border-radius: 8px; font-weight: 700; cursor: pointer; box-shadow: var(--shadow-raised); list-style: none; }
.faq-area summary::-webkit-details-marker { display: none; }
.faq-area details[open] summary { margin-bottom: 0; border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
.faq-area details[open] p { padding: 1.5rem; background: var(--view-surface); margin-bottom: 1rem; border-top: 1px solid rgba(0,0,0,0.05); border-bottom-left-radius: 8px; border-bottom-right-radius: 8px; }

@media(max-width: 900px) {
  .booking-layout { flex-direction: column; }
  .booking-info { position: static; }
}

/* Footer */
.sight-foot { background: var(--view-dark); color: var(--view-surface); padding: 4rem 0 2rem; text-align: center; }
.foot-links { display: flex; justify-content: center; gap: 2rem; margin: 2rem 0; flex-wrap: wrap; }
.foot-links a { opacity: 0.8; }
.foot-links a:hover { opacity: 1; color: #50E3C2; }
.disclaimer-txt { font-size: 0.85rem; opacity: 0.6; margin-bottom: 1rem; max-width: 800px; margin-left: auto; margin-right: auto; }

/* Cookie Alert */
.snack-alert { position: fixed; bottom: 0; left: 0; right: 0; background: var(--view-ink); color: var(--view-surface); padding: 1.5rem; z-index: 9999; display: flex; justify-content: center; align-items: center; gap: 2rem; box-shadow: 0 -5px 20px rgba(0,0,0,0.2); }
.snack-alert p { margin: 0; font-size: 0.9rem; }
.snack-btns { display: flex; gap: 1rem; }
.snack-btn { padding: 0.5rem 1.5rem; border: none; border-radius: 4px; cursor: pointer; font-family: inherit; font-weight: 600; }
#accept-cookie { background: var(--view-tone); color: #fff; }
#decline-cookie { background: rgba(255,255,255,0.1); color: #fff; }
@media(max-width: 600px) {
  .snack-alert { flex-direction: column; gap: 1rem; text-align: center; }
}