.wk-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 20px;
  background: rgba(8, 11, 20, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--wk-hairline);
}

.wk-wordmark {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--wk-wordmark);
  font-size: 15px;
  letter-spacing: 0.5px;
  line-height: 1;
}

.wk-wordmark-week {
  color: var(--wk-white);
}

.wk-wordmark-end {
  color: var(--wk-red);
}

.wk-identity {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.wk-identity strong {
  color: var(--wk-white);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
}

.wk-identity span {
  color: var(--wk-muted-3);
  font-size: 11.5px;
  line-height: 1.2;
}

.wk-header-rule {
  width: 1px;
  height: 20px;
  background: var(--wk-hairline-strong);
}

.wk-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.wk-pill {
  border: 0;
  border-radius: var(--wk-radius-pill);
  padding: 9px 18px;
  background: var(--wk-red);
  color: var(--wk-white);
  font-size: 13px;
  cursor: pointer;
}

.wk-pill[aria-pressed="false"],
.wk-pill.is-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #C9D0DE;
}

.wk-pill:hover {
  background: var(--wk-red-hover);
}

.wk-pill[aria-pressed="false"]:hover,
.wk-pill.is-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
}

.wk-pill:disabled,
.wk-pill[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
}

.wk-m2-note {
  font-size: 12.5px;
  color: var(--wk-muted-3);
}