/* app-shell.css — Uniflection App chrome. Uses existing CSS custom
   properties from textbook.css and map.css. No hard-coded colors. */

.uf-shell-fixed {
  position: fixed;
  top: 8px;
  z-index: 1050; /* above site-header (z:1000) */
  font-family: "Manrope", "Segoe UI", sans-serif;
}
.uf-shell-right { right: 8px; }
.uf-shell-left  { left: 8px; }

.uf-shell-inline {
  margin-left: 12px;
  display: inline-flex;
  align-items: center;
}

.uf-signin-btn,
.uf-account-btn {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 5px 10px;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 6px;
  background: var(--color-bg, #ffffff);
  color: var(--color-text, #1a1a2e);
  cursor: pointer;
  white-space: nowrap;
}
.uf-signin-btn:hover,
.uf-account-btn:hover {
  border-color: var(--color-accent, #2563eb);
}
.uf-signin-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.uf-account { position: relative; display: inline-block; }
.uf-account-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--color-bg, #fff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  min-width: 160px;
  overflow: hidden;
  z-index: 61;
}
.uf-account-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--color-text, #1a1a2e);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.uf-account-item:hover {
  background: var(--color-bg-alt, #f1f5f9);
}

.uf-bookmark {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 55;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border, #e2e8f0);
  background: var(--color-bg, #ffffff);
  color: var(--color-text, #1a1a2e);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.uf-bookmark.active {
  color: var(--color-accent, #2563eb);
}
@media (max-width: 900px) {
  .uf-bookmark { bottom: 8px; right: 8px; width: 36px; height: 36px; font-size: 1.1rem; }
}