/* CONRRAD institutional product chrome — shared by Home (via SiteChrome), Atlas, Demo.
   INT-ATLAS-025-A. Presentation only.
   INT-CITIZEN-009-A: shared chrome height token for Demo offset. */

:root {
  --eco-chrome-h-light: 3.5rem;
  --eco-chrome-h-dark: 2.5rem;
}

.eco-chrome {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--eco-chrome-h-light);
  padding: 0 1.1rem;
  border-bottom: 1px solid rgba(18, 32, 51, 0.12);
  background: rgba(244, 249, 252, 0.96);
  backdrop-filter: blur(6px);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: #122033;
}

.eco-chrome a {
  color: inherit;
  text-decoration: none;
}

.eco-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
}

.eco-logo img {
  width: 22px;
  height: 22px;
  display: block;
}

.eco-wordmark {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}

.eco-nav {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #5a6d82;
}

.eco-nav a:hover {
  color: #122033;
}

.eco-nav a[aria-current="page"] {
  color: #087a8c;
  border-bottom: 2px solid #087a8c;
  padding-bottom: 0.15rem;
}

/* Dark / Demo variant — compact so the first viewport keeps scene content */
.eco-chrome.eco-chrome--dark {
  height: var(--eco-chrome-h-dark);
  padding: 0 1rem;
  background: rgba(6, 18, 26, 0.92);
  border-bottom-color: rgba(232, 244, 248, 0.12);
  color: #e8f4f8;
}

.eco-chrome.eco-chrome--dark .eco-logo img {
  width: 18px;
  height: 18px;
}

.eco-chrome.eco-chrome--dark .eco-wordmark {
  font-size: 0.95rem;
}

.eco-chrome.eco-chrome--dark .eco-nav {
  color: #9fb6c4;
  gap: 0.7rem;
  font-size: 0.62rem;
}

.eco-chrome.eco-chrome--dark .eco-nav a:hover {
  color: #e8f4f8;
}

.eco-chrome.eco-chrome--dark .eco-nav a[aria-current="page"] {
  color: #6fb6c6;
  border-bottom-color: #6fb6c6;
}

body.has-eco-chrome {
  padding-top: var(--eco-chrome-h-light);
}

/* Demo: chrome offset matches the compact dark bar (not the Home/Atlas light bar). */
body.has-eco-chrome.eco-demo {
  padding-top: var(--eco-chrome-h-dark);
}

@media (max-width: 520px) {
  .eco-wordmark { font-size: 0.95rem; }
  .eco-nav { gap: 0.55rem; font-size: 0.62rem; }
  .eco-chrome {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--eco-chrome-h-dark);
    padding-top: 0.35rem;
    padding-bottom: 0.35rem;
  }
  body.has-eco-chrome.eco-demo {
    padding-top: 3.25rem; /* wrapped dark chrome */
  }
}