@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300;400;700&family=Playfair+Display:wght@400;600;700&display=swap');

:root {
  --vision-bg: #f8fafc;
  --vision-surface: #ffffff;
  --vision-accent: #0284c7;
  --vision-accent-hover: #0369a1;
  --vision-text-main: #0f172a;
  --vision-text-muted: #475569;
  --vision-border: #e2e8f0;
  --vision-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  
  --font-display: 'Playfair Display', serif;
  --font-body: 'Lato', sans-serif;
  
  --vision-pad-scale: 10dvh;
  --vision-radius: 16px;
  --vision-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--vision-bg);
  color: var(--vision-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--vision-text-main);
}

/* Header & Nav */
.vision-top-bar {
  background-color: var(--vision-surface);
  border-bottom: 1px solid var(--vision-border);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: box-shadow 0.3s ease;
}

.vision-top-bar:focus-within, .vision-top-bar:hover {
  box-shadow: var(--vision-shadow);
}

.vision-nav-layout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
  max-width: 1440px;
  margin: 0 auto;
}

.vision-logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--vision-text-main);
}

.vision-logo-icon {
  width: 32px;
  height: 32px;
  fill: var(--vision-accent);
}

.vision-menu-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.vision-menu-links a {
  text-decoration: none;
  color: var(--vision-text-muted);
  font-weight: 600;
  transition: color 0.2s;
}

.vision-menu-links a:hover {
  color: var(--vision-accent);
}

/* Mobile Menu Setup (CSS Only) */
.vision-hamburger-check {
  display: none;
}

.vision-hamburger-icon {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.vision-hamburger-icon span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--vision-text-main);
  transition: 0.3s;
}

@media (max-width: 768px) {
  .vision-hamburger-icon {
    display: flex;
  }
  
  .vision-menu-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--vision-surface);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-bottom: 1px solid transparent;
  }

  .vision-hamburger-check:checked ~ .vision-menu-links {
    max-height: 300px;
    border-bottom-color: var(--vision-border);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
  }

  .vision-menu-links li {
    width: 100%;
    text-align: center;
  }

  .vision-menu-links a {
    display: block;
    padding: 1rem;
    border-top: 1px solid var(--vision-bg);
  }
}

/* Preset B: Buttons */
.vision-action-trigger {
  display: inline-block;
  background-color: var(--vision-accent);
  color: var(--vision-surface);
  padding: 0.875rem 2rem;
  border-radius: var(--vision-radius);
  text-decoration: none;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  text-align: center;
}

.vision-action-trigger:hover {
  background-color: var(--vision-accent-hover);
  transform: translateY(-2px);
}

/* Timeline specific (Features) */
.optics-timeline-wrap {
  position: relative;
  padding-left: 2rem;
}

.optics-timeline-wrap::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--vision-border);
}

.optics-time-node {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 2rem;
}

.optics-time-number {
  position: absolute;
  left: -2rem;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--vision-accent);
  color: var(--vision-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-family: var(--font-display);
}

/* Cards (How it works) */
.optics-edge-card {
  background-color: var(--vision-surface);
  border-left: 5px solid var(--vision-accent);
  padding: 2rem;
  border-radius: 0 var(--vision-radius) var(--vision-radius) 0;
  box-shadow: var(--vision-shadow);
}

/* Inputs & Forms */
.vision-input-field {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--vision-border);
  border-radius: 8px;
  background-color: var(--vision-bg);
  color: var(--vision-text-main);
  font-family: var(--font-body);
  margin-bottom: 1rem;
}

.vision-input-field:focus {
  outline: none;
  border-color: var(--vision-accent);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.2);
}

/* Accordion / FAQ */
.vision-faq-item {
  background-color: var(--vision-surface);
  margin-bottom: 1rem;
  border-radius: 8px;
  border: 1px solid var(--vision-border);
  padding: 1.5rem;
}

.vision-faq-item h4 {
  margin-bottom: 0.5rem;
  color: var(--vision-accent);
}

/* Footer */
.vision-base-footer {
  background-color: var(--vision-text-main);
  color: var(--vision-surface);
  padding: 4rem 5%;
  text-align: center;
}

.vision-base-footer a {
  color: var(--vision-border);
  text-decoration: none;
}

.vision-base-footer a:hover {
  text-decoration: underline;
}

/* Cookie Banner */
#vision-cookie-notice {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--vision-surface);
  border-top: 1px solid var(--vision-border);
  box-shadow: 0 -4px 10px rgba(0,0,0,0.05);
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 9999;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 640px) {
  #vision-cookie-notice {
    flex-direction: column;
    text-align: center;
  }
}