/* Demo video button + on-page popup modal
   Loaded site-wide alongside site-header.css / site-buttons.css */

.topbar .header-demo {
  display: inline-flex;
  min-height: 0;
  align-items: center;
  gap: 6px;
  border: 1.5px solid var(--line-strong, var(--border));
  border-radius: 8px;
  margin-left: 0;
  padding: 8px 16px;
  background: transparent;
  color: var(--ink, var(--text));
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.topbar .header-demo:hover,
.topbar .header-demo:focus-visible {
  border-color: var(--brand, var(--accent));
  color: var(--brand, var(--accent));
  outline: none;
  transform: translateY(-1px);
}

.topbar .header-demo .demo-play-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  flex: none;
}

@media (max-width: 720px) {
  .topbar .header-demo {
    padding: 7px 12px;
    font-size: 12.5px;
  }
}

/* Modal overlay */
.site-demo-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 12, 20, 0.78);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease;
}

.site-demo-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.site-demo-dialog {
  position: relative;
  width: 100%;
  max-width: 960px;
  background: #05070c;
  border-radius: 14px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transform: scale(0.96);
  transition: transform 0.18s ease;
}

.site-demo-overlay.is-open .site-demo-dialog {
  transform: scale(1);
}

.site-demo-dialog video {
  display: block;
  width: 100%;
  max-height: 82vh;
  background: #000;
}

.site-demo-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: rgba(8, 12, 20, 0.65);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}

.site-demo-close:hover,
.site-demo-close:focus-visible {
  background: rgba(8, 12, 20, 0.9);
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  .site-demo-overlay,
  .site-demo-dialog,
  .topbar .header-demo {
    transition: none;
  }
}