/* ==========================================================================
   Webmail - responsive breakpoints (desktop / laptop / tablet / mobile)
   ========================================================================== */

/* Laptop */
@media (max-width: 1200px) {
  .list-pane { width: 360px; }
  .reading-content { padding: 20px; }
}

/* Tablet */
@media (max-width: 992px) {
  .sidebar {
    position: fixed; top: var(--wm-topbar-h); bottom: 0; left: 0;
    z-index: 50; transform: translateX(-100%);
    transition: transform .2s ease; box-shadow: var(--wm-shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop.show {
    display: block; position: fixed; inset: var(--wm-topbar-h) 0 0 0;
    background: rgba(0,0,0,.35); z-index: 45;
  }
  .topbar-search { max-width: 320px; }
  .list-pane { width: 320px; }
}

/* Mobile: stack list + reading pane, one visible at a time */
@media (max-width: 768px) {
  .topbar { gap: 8px; padding: 0 10px; }
  .topbar-logo span { display: none; }
  .topbar-search { max-width: none; flex: 1 1 auto; }

  .main-area { position: relative; }
  .list-pane { width: 100%; position: absolute; inset: 0; z-index: 5; }
  .reading-pane { width: 100%; position: absolute; inset: 0; z-index: 6; transform: translateX(100%); transition: transform .2s ease; }
  .reading-pane.active { transform: translateX(0); }
  .main-area.reading-open .list-pane { display: none; }

  .compose-panel { right: 0; left: 0; }
  .compose-window { width: 100%; max-width: 100%; border-radius: 0; max-height: 100vh; }
  .compose-header { border-radius: 0; }

  .reading-content { padding: 16px; }
  .reading-actions { flex-wrap: wrap; }

  .admin-shell { flex-direction: column; }
  .admin-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; padding: 10px; }
  .admin-sidebar .nav { flex-direction: row; flex-wrap: wrap; }
  .admin-main { padding: 16px; }
}

@media (max-width: 480px) {
  .auth-card { padding: 26px 20px; }
  .email-item { padding: 10px; }
  .list-toolbar-title { display: none; }
}

/* Back button shown on mobile inside the reading pane header */
.reading-back-btn { display: none; }
@media (max-width: 768px) {
  .reading-back-btn { display: inline-flex; }
}