/* Shared site header — modern, token-based (light/dark), used on every
   client-app page (landing, demos, demo, archive). */

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;

  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3, 12px) var(--space-5, 24px);

  /* Taller banner; reserve room on the right so the floating theme toggle
     (fixed, ~40px) never overlaps the nav. */
  padding: 18px 76px 18px 28px;

  /* Same navy as the PAGODA portal side menu. */
  background: linear-gradient(180deg, var(--banner-bg) 0%, var(--banner-bg-dark) 100%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.25);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

/* PAGODA tier stripe (magenta · green · blue · red) along the top edge. */
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg,
    #c7388f 0%, #c7388f 25%,
    #1fae2c 25%, #1fae2c 50%,
    #2b4acb 50%, #2b4acb 75%,
    #ee3424 75%, #ee3424 100%);
}

.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;

  text-decoration: none;
  color: var(--banner-text);
}

.site-header .brand-logo {
  flex: none;
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.site-header .brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-header .brand-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--banner-text);
}

.site-header .brand-title .sep {
  color: var(--banner-text-muted);
}

.site-header .brand-sub {
  font-size: 12px;
  color: var(--banner-text-muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.site-header .site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 999px;

  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.2px;
  text-decoration: none;
  color: var(--banner-text);

  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);

  transition: color .15s ease, background-color .15s ease, border-color .15s ease;
}

.site-header .site-nav a:hover {
  color: #fff;
  background: var(--banner-hover);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Portail PAGODA — highlighted like the portal's own accent. */
.site-header .site-nav a.portal {
  color: #0f2a45;
  background: #a8c8ff;
  border-color: #a8c8ff;
}

.site-header .site-nav a.portal:hover {
  color: #0f2a45;
  background: #cbe0ff;
  border-color: #cbe0ff;
}

.site-header .site-nav a.ext {
  color: var(--banner-text-muted);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.14);
}

.site-header .site-nav a.ext:hover {
  color: #fff;
}

/* Padlock marking a link that requires authentication. */
.site-header .site-nav a .lock {
  width: 13px;
  height: 13px;
  opacity: 0.9;
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 60px 12px 16px;
  }
  .site-header .brand-sub {
    display: none;
  }
  .site-nav a {
    padding: 7px 11px;
    font-size: 13.5px;
  }
}