/* Site chrome for static hard-sample pages */
.osa-chrome {
  --osa-bg: #05070a;
  --osa-line: rgba(77, 255, 168, 0.22);
  --osa-line-hot: rgba(77, 255, 168, 0.58);
  --osa-text: #d7ffe8;
  --osa-muted: #85a997;
  --osa-green: #4dffa8;
  --osa-amber: #ffc857;
  --osa-shadow: rgba(0, 0, 0, 0.42);
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--osa-line);
  background: rgba(5, 7, 10, 0.92);
  box-shadow: 0 18px 42px var(--osa-shadow);
  backdrop-filter: blur(16px);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.osa-chrome__inner {
  display: flex;
  width: calc(100% - 40px);
  max-width: 1120px;
  min-height: 76px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 0;
}

.osa-chrome__brand {
  display: inline-flex;
  min-width: 220px;
  align-items: center;
  gap: 12px;
  color: var(--osa-text);
  text-decoration: none;
}

.osa-chrome__brand:hover,
.osa-chrome__brand:focus {
  color: var(--osa-text);
  text-decoration: none;
}

.osa-chrome__mark {
  width: 54px;
  height: 54px;
  flex: 0 0 54px;
  border: 1px solid var(--osa-line-hot);
  border-radius: 6px;
  background: #000;
  object-fit: cover;
  box-shadow: 0 0 24px rgba(77, 255, 168, 0.2);
}

.osa-chrome__copy {
  display: grid;
  gap: 1px;
}

.osa-chrome__eyebrow {
  color: var(--osa-amber);
  font-size: 0.78rem;
}

.osa-chrome__title {
  color: #f2fff7;
  font-size: 1rem;
  font-weight: 700;
}

.osa-chrome__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.osa-chrome__link {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--osa-muted);
  background: rgba(77, 255, 168, 0.045);
  font-size: 0.86rem;
  line-height: 1;
  text-decoration: none;
}

.osa-chrome__link:hover,
.osa-chrome__link:focus,
.osa-chrome__link.is-active {
  border-color: var(--osa-line-hot);
  color: var(--osa-green);
  background: rgba(77, 255, 168, 0.11);
  box-shadow: inset 0 0 18px rgba(77, 255, 168, 0.07);
  text-decoration: none;
}

@media (max-width: 860px) {
  .osa-chrome__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .osa-chrome__nav {
    justify-content: flex-start;
  }
}