/* Shared account entry point for the landing page, resources, and guide. */
.auth-trigger {
  width: 36px;
  height: 36px;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  padding: 0;
  border: 1px solid var(--line, var(--border));
  border-radius: 10px;
  background: var(--paper);
  color: var(--muted, var(--secondary));
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}
.auth-trigger:hover,
.auth-trigger:focus-visible {
  border-color: var(--plum);
  color: var(--plum);
  outline: none;
}
.auth-trigger[data-auth-state="signed-in"] {
  border-color: color-mix(in srgb, var(--plum) 55%, var(--line, var(--border)));
  color: var(--plum);
  background: var(--plum-soft, var(--plum-wash));
}
.header-actions .auth-trigger { order: 5; }
.auth-trigger-icon { width: 16px; height: 16px; flex: 0 0 16px; }
.auth-trigger-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.auth-trigger:not([data-auth-state="signed-in"]) { width:auto; min-width:86px; padding:0 13px; gap:8px; border-color:var(--plum,#9b79b8); color:var(--plum,#9b79b8); }
.auth-trigger:not([data-auth-state="signed-in"]) .auth-trigger-label { position:static; width:auto; height:auto; overflow:visible; clip:auto; white-space:nowrap; }

.auth-dialog {
  width: min(440px, calc(100vw - 32px));
  padding: 0;
  border: 1px solid var(--line, var(--border));
  border-radius: 20px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 28px 80px color-mix(in srgb, var(--ink) 28%, transparent);
}
.auth-dialog::backdrop { background: color-mix(in srgb, var(--ink) 58%, transparent); backdrop-filter: blur(4px); }
.auth-dialog-card { position: relative; padding: 30px; }
.auth-dialog-close {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line, var(--border));
  border-radius: 10px;
  background: var(--paper);
  color: var(--muted, var(--secondary));
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}
.auth-dialog-close svg { width: 18px; height: 18px; display: block; }
.auth-dialog-close:hover,
.auth-dialog-close:focus-visible { border-color: var(--plum); color: var(--plum); outline: none; }
.auth-kicker { margin: 0 0 14px; color: var(--plum); font: 600 11px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .14em; }
.auth-dialog h2 { max-width: 10ch; margin: 0; font-family: "Noto Serif TC", "Songti TC", serif; font-size: clamp(32px, 7vw, 46px); line-height: 1; letter-spacing: -.055em; }
.auth-dialog-copy { max-width: 34ch; margin: 18px 0 24px; color: var(--muted, var(--secondary)); font-size: 14px; line-height: 1.7; }
.auth-providers { display: grid; gap: 10px; }
.auth-provider {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--line, var(--border));
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.auth-provider:hover,
.auth-provider:focus-visible { border-color: var(--plum); background: var(--plum-soft, var(--plum-wash)); outline: none; transform: translateY(-1px); }
.auth-provider:disabled { opacity: .55; cursor: wait; transform: none; }
.auth-status { margin: 17px 0 0; padding: 12px 13px; border-top: 1px solid var(--line, var(--border)); color: var(--muted, var(--secondary)); font-size: 12px; line-height: 1.6; }
.auth-status[data-tone="error"] { color: #a45757; }
.auth-session { display: grid; gap: 18px; }
.auth-session-email { margin: 0; color: var(--muted, var(--secondary)); font-size: 14px; overflow-wrap: anywhere; }
.auth-session-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.auth-session-link,
.auth-signout {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 15px;
  border-radius: 999px;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
}
.auth-session-link { background: var(--ink); color: var(--paper); }
.auth-session-link:hover { background: var(--plum); }
.auth-signout { border: 1px solid var(--line, var(--border)); background: var(--paper); color: var(--muted, var(--secondary)); }
.auth-signout:hover { border-color: var(--plum); color: var(--plum); }

@media (max-width: 900px) {
  .topbar .auth-trigger { order: 5; margin-left: 0; }
  .topbar .quick-search { margin-left: 0; }
  .topbar .language-menu { order: 2; }
  .topbar .theme-toggle { order: 3; }
  .topbar .mobile-menu-button { order: 4; }
}
@media (max-width: 560px) {
  .auth-dialog-card { padding: 26px 22px 24px; }
  .auth-dialog-close { top: 16px; right: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .auth-trigger, .auth-provider { transition: none; }
}