.site-header {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0 var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  color: var(--color-primary);
  min-width: 0;
}
.brand > span:last-child {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.brand-mark {
  background: var(--color-primary);
  color: #fff;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.55rem;
  font-weight: 800;
  flex-shrink: 0;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.icon-button {
  width: var(--touch-size);
  height: var(--touch-size);
  border: 0;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: grid;
  place-items: center;
  color: var(--color-ink);
}
.icon-button:hover { background: var(--color-border); }
.notification-dropdown {
  width: min(23rem, calc(100vw - 2rem));
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-overlay);
  max-height: 70dvh;
  overflow: auto;
}
.dropdown-heading {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  gap: var(--space-2);
}
.dropdown-heading a {
  font-size: 0.875rem;
}
.notification-item {
  display: block;
  border-bottom: 1px solid var(--color-border);
  padding: 0.8rem 0;
  color: var(--color-ink);
}
.notification-item strong {
  font-size: 0.9375rem;
}
.notification-item p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin: 0.25rem 0 0;
}
@media (min-width: 720px) {
  .site-header {
    padding: 0 var(--space-8);
  }
  .brand > span:last-child {
    max-width: 15rem;
  }
}

.brand {
  flex: 1;
  font-size: 1.125rem;
  overflow: hidden;
}
.header-actions {
  flex-shrink: 0;
  gap: var(--space-1);
}
.header-profile {
  width: var(--touch-size);
  height: var(--touch-size);
  display: grid;
  place-items: center;
}
.header-profile .avatar {
  width: 2.125rem;
  height: 2.125rem;
}
.search-input-row {
  display: flex;
  gap: var(--space-2);
}
.search-input-row input {
  min-width: 0;
}
@media (max-width: 719px) {
  .notification-dropdown {
    position: fixed !important;
    top: calc(var(--header-height) + 0.5rem) !important;
    right: 0.75rem !important;
    left: auto !important;
    transform: none !important;
  }
  .search-modal .modal-dialog {
    margin: 0.75rem;
    align-items: flex-start;
    min-height: auto;
  }
}