.pca-account {
  --account-surface: var(--surface, #fff);
  --account-text: var(--text, #202020);
  --account-muted: var(--muted, #606060);
  --account-border: var(--border, #dedede);
  --account-primary: var(--primary, var(--pca-primary, #14796c));
  --account-soft: var(--soft, var(--pca-primary-soft, #e9f3ef));
  --account-danger: var(--wrong, #b91c1c);
  --account-success: var(--answer, #047857);
  flex: 0 0 auto;
  color: var(--account-text);
  font: 14px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.pca-account *, .pca-account { box-sizing: border-box; }
.pca-welcome {
  left: max(16px, calc((100vw - 460px) / 2));
  right: auto;
  margin-inline: 0;
  width: min(460px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  padding: 28px;
  border: 1px solid var(--account-border);
  border-radius: 18px;
  background: var(--account-surface);
  color: var(--account-text);
  box-shadow: var(--modal-shadow, 0 20px 60px #0003);
  font: inherit;
}
.pca-welcome::backdrop { background: var(--modal-scrim, #0007); }
.pca-welcome h2 { margin: 0 0 12px; color: var(--account-text); font-size: 23px; line-height: 1.3; }
.pca-welcome p { margin: 0; color: var(--account-muted); line-height: 1.6; }
.pca-welcome-warning { margin-block: 20px; padding: 16px; border: 1px solid var(--account-border); border-radius: 10px; background: var(--account-soft); }
.pca-welcome-warning strong { display: block; margin-bottom: 6px; }
.pca-welcome-actions { display: grid; gap: 10px; }
.pca-welcome-actions button { min-height: 44px; padding: 10px 16px; border: 1px solid var(--account-border); border-radius: 9px; background: var(--account-surface); color: var(--account-text); font: inherit; font-weight: 700; cursor: pointer; }
.pca-welcome-actions .pca-welcome-signin { border-color: var(--pca-link, #0e5d53); background: var(--account-primary); color: var(--on-primary, #fff); }
.pca-welcome-actions button:hover { box-shadow: 0 0 0 3px var(--account-soft); }
.pca-welcome-actions button:focus-visible { outline: 2px solid var(--ring, #14796c); outline-offset: 3px; }
.pca-welcome-actions button:disabled { opacity: .6; cursor: wait; }
.pca-welcome .pca-welcome-error { margin-bottom: 16px; color: var(--account-danger); }
.pca-account [hidden], .pca-account .pca-account-action[hidden] { display: none; }
.pca-account-host > .nav-actions { margin-inline-start: auto; }
.pca-account-floating {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: max(16px, env(safe-area-inset-right));
  z-index: 30;
}

.pca-account .pca-account-trigger {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 3px;
  border: 1px solid var(--account-border);
  border-radius: 50%;
  background: var(--account-surface);
  color: var(--pca-link, #0e5d53);
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.pca-account .pca-account-trigger:hover,
.pca-account .pca-account-trigger[aria-expanded="true"] {
  border-color: var(--pca-link, #0e5d53);
  box-shadow: 0 0 0 3px var(--account-soft);
}

.pca-account-avatar {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 36px;
  height: 36px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--account-soft);
  color: var(--pca-link, #0e5d53);
  font-size: 16px;
  font-weight: 750;
}

.pca-account-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pca-account svg { display: block; flex: 0 0 auto; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.pca-account-indicator {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 11px;
  height: 11px;
  border: 2px solid var(--account-surface);
  border-radius: 50%;
  background: var(--account-muted);
}
.pca-account[data-signed-in="true"] .pca-account-indicator { background: var(--account-success); }
.pca-account-trigger[data-error="true"] .pca-account-indicator { background: var(--account-danger); }

.pca-account-panel {
  position: fixed;
  inset: auto;
  width: min(340px, calc(100vw - 24px));
  margin: 0;
  padding: 8px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--account-border);
  border-radius: 18px;
  background: var(--account-surface);
  color: var(--account-text);
  box-shadow: var(--modal-shadow, 0 20px 60px rgba(34,48,57,.18));
  font: inherit;
}
.pca-account-panel:popover-open { animation: pca-account-appear 160ms ease-out; }
.pca-account-panel::backdrop { background: transparent; }
.pca-account-heading { display: flex; align-items: center; justify-content: space-between; padding-left: 12px; }
.pca-account-heading > strong { color: var(--account-muted); font-size: 12px; font-weight: 650; letter-spacing: .04em; }
.pca-account .pca-account-close {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--account-muted);
  cursor: pointer;
}
.pca-account-profile { display: flex; align-items: center; gap: 12px; padding: 4px 12px 18px; }
.pca-account-profile .pca-account-avatar { width: 48px; height: 48px; font-size: 20px; }
.pca-account-details { display: grid; gap: 3px; min-width: 0; overflow-wrap: anywhere; }
.pca-account-details strong { font-size: 16px; font-weight: 750; }
.pca-account-details > span { color: var(--account-muted); font-size: 12px; }
.pca-account-status {
  margin: 0 12px 16px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--account-soft);
  color: var(--pca-link, #0e5d53);
  font-size: 12px;
  overflow-wrap: anywhere;
}
.pca-account-status[data-error="true"] { background: var(--wrong-bg, #fef2f2); color: var(--account-danger); }
.pca-account-actions { display: grid; gap: 4px; padding-top: 8px; border-top: 1px solid var(--account-border); }
.pca-account-recovery { display: grid; gap: 4px; margin: -8px 0 8px; }
.pca-account .pca-account-action {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 44px;
  margin: 0;
  padding: 11px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--account-text);
  font: inherit;
  font-weight: 550;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 160ms ease, color 160ms ease;
}
.pca-account-action svg { color: var(--account-muted); }
.pca-account .pca-account-action:hover:not(:disabled),
.pca-account .pca-account-close:hover { background: var(--account-soft); color: var(--pca-link, #0e5d53); }
.pca-account .pca-account-signout { margin-top: 4px; border-top: 1px solid var(--account-border); border-radius: 0 0 10px 10px; color: var(--account-danger); }
.pca-account-signout svg { color: inherit; }
.pca-account .pca-account-signout:hover:not(:disabled) { background: var(--wrong-bg, #fef2f2); color: var(--account-danger); }
.pca-account .pca-account-signin { background: var(--account-primary); color: var(--on-primary, #fff); }
.pca-account-signin svg { color: inherit; }
.pca-account .pca-account-signin:hover:not(:disabled) { background: var(--primary-hover, var(--pca-primary-hover, #0e5d53)); color: var(--on-primary, #fff); }
.pca-account .pca-account-action:disabled { opacity: .55; cursor: wait; }
.pca-account .pca-account-action[aria-busy="true"] svg { opacity: .6; }
.pca-account button:focus-visible, .pca-account a:focus-visible { outline: 2px solid var(--ring, #14796c); outline-offset: 2px; }
.pca-account-panel:focus { outline: none; }

/* Shared loading presentation for the reader, OAuth callback and account actions. */
.pca-loading-screen {
  display: grid;
  min-height: max(280px, calc(100dvh - 240px));
  place-items: center;
  padding: 32px 20px;
}
.pca-loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: 420px;
  color: var(--text, var(--pca-ink, #17201d));
  font: 15px/1.6 var(--pca-sans, system-ui, sans-serif);
  text-align: center;
  overflow-wrap: anywhere;
}
.pca-loading-content h1 { margin: 0; color: inherit; font: 650 24px/1.3 var(--pca-sans, system-ui, sans-serif); }
.pca-loading-content p { margin: 0; color: var(--muted, var(--pca-muted, #69716c)); }
.pca-loading-content a { color: inherit; text-underline-offset: 4px; }
.pca-spinner {
  display: block;
  box-sizing: border-box;
  width: 36px;
  height: 36px;
  border: 3px solid var(--border, var(--pca-line, #d8d6cd));
  border-top-color: var(--text, var(--pca-ink, #17201d));
  border-radius: 50%;
  animation: pca-loading-spin 800ms linear infinite;
}
.pca-spinner[hidden], .pca-loading-content [hidden] { display: none; }
.pca-auth-page { margin: 0; background: var(--pca-bg, #f4f1e9); }
.pca-auth-page .pca-loading-screen { min-height: 100dvh; box-sizing: border-box; }
.pca-auth-loading {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 24px;
  border: 0;
  box-sizing: border-box;
  background: var(--bg, var(--pca-bg, #f4f1e9));
}
.pca-auth-loading[open] { display: grid; place-items: center; }
.pca-auth-loading::backdrop { background: var(--bg, var(--pca-bg, #f4f1e9)); }
.save-state .save-dot { background: var(--muted, #69716c); }
.save-state .save-dot.saved { background: var(--answer, #047857); }
.save-state .save-dot.loading {
  box-sizing: border-box;
  background: transparent;
  border: 1.5px solid var(--border, #d8d6cd);
  border-top-color: var(--muted, #69716c);
  animation: pca-loading-spin 800ms linear infinite;
}
@keyframes pca-loading-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .pca-spinner, .save-state .save-dot.loading { animation: none; }
}

@keyframes pca-account-appear {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 520px) {
  .pca-account-host { display: grid; grid-template-columns: minmax(0, 1fr) 44px; gap: 8px; align-items: center; }
  .pca-account-host > .nav-identity { grid-area: 1 / 1; width: auto; }
  .pca-account-host > .nav-actions { grid-area: 2 / 1 / 3 / -1; margin-inline-start: 0; }
  .pca-account-host > .pca-account { grid-area: 1 / 2; }
}
@media (prefers-reduced-motion: reduce) {
  .pca-account-panel:popover-open { animation: none; }
  .pca-account button, .pca-account a { transition: none; }
}

/* Match account controls to the shared reader design system. */
.pca-welcome, .pca-account-panel { border-radius: var(--pca-radius-card, 16px); }
.pca-welcome-actions button, .pca-account button { border-radius: var(--pca-radius-control, 8px); }
.pca-welcome-actions .pca-welcome-signin, .pca-account .pca-account-signin { box-shadow: var(--pca-bevel-primary); }
.pca-welcome-actions button:hover { box-shadow: var(--pca-shadow); }

.pca-account .pca-account-trigger,
.pca-welcome-actions button:not(.pca-welcome-signin) { border-color: currentColor; }

.pca-welcome-actions .pca-welcome-signin, .pca-account .pca-account-signin {
  background: var(--pca-action-bg, #14796c); border-color: var(--pca-action-bg, #14796c); box-shadow: none;
}
.pca-welcome-actions .pca-welcome-signin:hover:not(:disabled),
.pca-account .pca-account-signin:hover:not(:disabled) {
  background: var(--pca-action-hover, #0e5d53); border-color: var(--pca-action-hover, #0e5d53);
}