.c-header:not(.topbar) {
  min-height: 56px;
  background: var(--chrome-bg);
  color: var(--chrome-text);
  border-bottom: 1px solid var(--chrome-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.35rem 0.85rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.c-left,
.c-right {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
}

.c-right {
  margin-left: auto;
}

.c-brand {
  color: var(--chrome-text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.c-btn,
.c-icon-btn,
.c-avatar-btn {
  min-height: 40px;
  min-width: 40px;
  border: 1px solid var(--chrome-border);
  border-radius: 0.55rem;
  background: var(--chrome-surface);
  color: var(--chrome-text);
  text-decoration: none;
  font: inherit;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.c-btn-ghost {
  background: transparent;
}

.c-btn-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

.c-btn:hover,
.c-icon-btn:hover,
.c-avatar-btn:hover,
.c-panel-item:hover {
  background: color-mix(in srgb, var(--chrome-text) 12%, transparent);
}

.c-btn:focus-visible,
.c-icon-btn:focus-visible,
.c-avatar-btn:focus-visible,
.c-panel-item:focus-visible,
.c-brand:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.c-icon-btn svg,
.c-avatar-btn svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.c-welcome {
  font-size: 0.9rem;
  color: var(--chrome-text);
  font-weight: 650;
  margin: 0 0.2rem;
  white-space: nowrap;
}

.c-dd {
  position: relative;
}

.c-dd > summary {
  list-style: none;
}

.c-dd > summary::-webkit-details-marker {
  display: none;
}

.c-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.35rem);
  z-index: 1200;
  min-width: 13rem;
  background: var(--chrome-surface);
  border: 1px solid var(--chrome-border);
  border-radius: 0.7rem;
  box-shadow: var(--shadow-md);
  padding: 0.35rem;
  display: grid;
  gap: 0.2rem;
  color: var(--chrome-text);
}

.c-panel-apps {
  min-width: 11rem;
}

.c-panel-user {
  min-width: 15rem;
}

.c-userline {
  font-size: 0.82rem;
  color: var(--chrome-muted);
  padding: 0.28rem 0.55rem 0.48rem;
  border-bottom: 1px solid var(--chrome-border);
  margin-bottom: 0.18rem;
  word-break: break-word;
}

.c-panel-item {
  min-height: 38px;
  border-radius: 0.5rem;
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.4rem;
  padding: 0.42rem 0.6rem;
  border: 1px solid transparent;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.c-panel-item[aria-disabled="true"] {
  opacity: 0.66;
  pointer-events: none;
}

.c-header[data-auth="0"] .only-auth {
  display: none !important;
}

.c-header[data-auth="1"] .only-guest {
  display: none !important;
}

.c-header[data-suite="0"] .suite-only {
  display: none !important;
}

.c-header[data-can-admin="0"] .admin-only {
  display: none !important;
}

.appearance-modal[hidden] {
  display: none !important;
}

.appearance-modal {
  position: fixed;
  inset: 0;
  z-index: 1300;
  background: color-mix(in srgb, var(--overlay-bg) 36%, transparent);
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 3.35rem 0.8rem 0.8rem;
}

.appearance-dialog {
  width: min(23.5rem, calc(100vw - 1.6rem));
  max-height: min(74vh, 38rem);
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-md);
  padding: 0.9rem;
}

.appearance-title {
  margin: 0 0 0.22rem;
  font-size: 1.1rem;
}

.appearance-subtitle {
  margin: 0 0 0.72rem;
  color: var(--muted);
}

.appearance-fieldset {
  margin: 0 0 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  padding: 0.55rem;
  display: grid;
  gap: 0.25rem;
}

.appearance-fieldset legend {
  padding: 0 0.3rem;
  font-weight: 700;
}

.appearance-option {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 32px;
}

.appearance-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.45rem;
  margin-top: 0.6rem;
}

@media (max-width: 720px) {
  .c-welcome {
    display: none;
  }

  .c-panel {
    min-width: min(14rem, calc(100vw - 2rem));
  }
}