/* =====================================================================
   PrevCS · Topbar (sticky header) + user menu + theme switch
   ===================================================================== */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 0 var(--pad-x);
  background: var(--bg-header);
  backdrop-filter: saturate(1.2) blur(14px);
  -webkit-backdrop-filter: saturate(1.2) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-normal), background var(--transition-normal);
}
.topbar.is-scrolled {
  border-bottom-color: var(--hair);
}

/* Brand lockup: dot logo + wordmark */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.brand__logo {
  display: inline-grid;
  grid-template-columns: repeat(2, 6px);
  grid-template-rows: repeat(2, 6px);
  gap: 2px;
  padding: 5px;
  border-radius: var(--radius-sm);
  background: var(--text-primary);
}
.brand__logo span {
  width: 6px;
  height: 6px;
  border-radius: 1.5px;
  background: var(--bg);
  opacity: .85;
}
.brand__logo span:last-child {
  background: var(--live);
  opacity: 1;
  animation: blink 1.4s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

/* legacy single-band logo (back-compat) */
.brand__logo-band {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--bg);
  border-radius: inherit;
}

/* center nav slot (optional) */
.topbar__nav {
  justify-self: center;
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--hair);
  background: var(--bg-card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}
.topbar__nav a {
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  color: var(--text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.topbar__nav a:hover { background: var(--hair); color: var(--text-primary); }
.topbar__nav a.is-active { background: var(--text-primary); color: var(--bg); }

.topbar__actions {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.topbar-login {
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
}
.topbar-gear {
  list-style: none;
  display: inline-grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hair);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
}
.topbar-gear::-webkit-details-marker { display: none; }
.topbar-gear:hover { color: var(--text-primary); border-color: var(--hair-2); }

@media (max-width: 900px) {
  .topbar__nav { display: none; }
  .topbar { grid-template-columns: auto 1fr auto; gap: 12px; }
  /* When a sidebar drawer exists on this page, the topbar shows a burger
     at the left. Tighten brand text so it shares space gracefully. */
  body:has([data-sidebar]) .brand__text span:nth-child(2),
  body:has([data-sidebar]) .brand__text span:nth-child(3) { display: none; }
  body:has([data-sidebar]) .brand__text span:first-child { font-size: 16.5px; }
}

/* ─── Topbar burger (opens mobile sidebar drawer) ─────────── */
.topbar-burger {
  display: none;
  place-items: center;
  width: 38px; height: 38px;
  padding: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--hair);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  position: relative;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.topbar-burger:hover { background: var(--bg-2); border-color: var(--hair-2); }
.topbar-burger span {
  position: absolute;
  left: 10px; right: 10px;
  height: 1.6px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}
.topbar-burger span:nth-child(1) { top: 13px; }
.topbar-burger span:nth-child(2) { top: 18px; }
.topbar-burger span:nth-child(3) { top: 23px; }
.topbar-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.topbar-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.topbar-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
@media (max-width: 900px) {
  .topbar-burger { display: inline-grid; }
}

/* ─── USER MENU (chip + dropdown) ─────────────────────────── */
.user-menu { position: relative; }
.user-menu > summary { list-style: none; }
.user-menu > summary::-webkit-details-marker { display: none; }

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 6px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hair);
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.user-chip:hover { border-color: var(--hair-2); }
.user-chip__icon {
  width: 28px; height: 28px;
  border-radius: var(--radius-pill);
  background: var(--text-primary);
  color: var(--bg);
  display: inline-grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.user-chip__icon svg { width: 18px; height: 18px; }
.user-chip__icon img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; border-radius: 50%;
}
.user-chip__icon.has-img svg,
.user-chip__icon.has-img .user-chip__icon-fallback { display: none; }
.user-chip__icon-fallback {
  display: grid; place-items: center;
  width: 100%; height: 100%;
}
.user-chip__label {
  font-size: 15px;
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}
.session-dot {
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--live);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--live) 25%, transparent);
}

.user-menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 240px;
  padding: 6px;
  background: var(--bg-card);
  border: 1px solid var(--hair);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.user-menu.is-open .user-menu__panel,
.user-menu[open] .user-menu__panel {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.user-menu.is-closing .user-menu__panel { opacity: 0; transform: translateY(-4px); }

/* Mismas medidas que los .menu-link del sidebar: 22px de caja de icono,
   svg de 20px, 12px de gap, 15.5px de texto y la misma escala de tinta. */
.user-menu__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 15.5px;
  color: color-mix(in oklab, var(--text-primary) 80%, transparent);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.user-menu__item:hover {
  background: color-mix(in oklab, var(--text-primary) 6%, transparent);
  color: var(--text-primary);
}
.user-menu__item-icon {
  width: 22px; height: 22px;
  display: inline-grid; place-items: center;
  color: color-mix(in oklab, currentColor 65%, transparent);
}
.user-menu__item-icon svg { width: 20px; height: 20px; }
.user-menu__item--danger { color: var(--error); }
.user-menu__item--danger:hover {
  background: color-mix(in oklab, var(--error) 8%, transparent);
  color: var(--error);
}
.user-menu__item--theme { gap: 10px; }
.user-menu__item--theme > span:nth-child(2) { flex: 1; }

/* ─── THEME SWITCH (animated sun/moon) ─────────────────── */
.theme-switch {
  --container-w: 56px;
  --container-h: 28px;
  --circle-size: 22px;
  display: inline-block;
  cursor: pointer;
  position: relative;
}
.theme-switch--compact { --container-w: 48px; --container-h: 24px; --circle-size: 18px; }
.theme-switch__checkbox { position: absolute; opacity: 0; pointer-events: none; }
.theme-switch__container {
  width: var(--container-w);
  height: var(--container-h);
  background: linear-gradient(180deg, #5dafe9 0%, #b6dcf3 100%);
  border-radius: 999px;
  position: relative;
  overflow: hidden;
  transition: background var(--transition-slow);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.06), inset 0 1px 2px rgba(0,0,0,.08);
}
body[data-theme="dark"] .theme-switch__container,
.theme-switch__checkbox:checked + .theme-switch__container {
  background: linear-gradient(180deg, #0e1a2b 0%, #1f2c43 100%);
}
.theme-switch__clouds {
  position: absolute;
  width: 60%;
  height: 12px;
  background: #fff;
  border-radius: 999px;
  bottom: 4px;
  left: 8px;
  opacity: .65;
  filter: blur(2px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
body[data-theme="dark"] .theme-switch__clouds,
.theme-switch__checkbox:checked ~ * .theme-switch__clouds { opacity: 0; }
.theme-switch__stars-container {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity var(--transition-slow);
}
body[data-theme="dark"] .theme-switch__stars-container,
.theme-switch__checkbox:checked ~ * .theme-switch__stars-container { opacity: 1; }
.theme-switch__stars-container svg { width: 100%; height: 100%; opacity: .9; }
.theme-switch__circle-container {
  position: absolute;
  top: 50%;
  left: 3px;
  width: var(--circle-size);
  height: var(--circle-size);
  transform: translateY(-50%);
  transition: left var(--transition-slow), transform var(--transition-slow);
}
.theme-switch__checkbox:checked + .theme-switch__container .theme-switch__circle-container {
  left: calc(var(--container-w) - var(--circle-size) - 3px);
}
.theme-switch__sun-moon-container {
  width: 100%; height: 100%;
  border-radius: 999px;
  background: radial-gradient(circle at 35% 35%, #ffe9a0 0%, #ffc24a 70%);
  position: relative;
  box-shadow: 0 0 12px rgba(255,194,74,.4);
  overflow: hidden;
  transition: background var(--transition-slow), box-shadow var(--transition-slow);
}
.theme-switch__moon {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: #e6e9f0;
  opacity: 0;
  transform: scale(.6);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
body[data-theme="dark"] .theme-switch__sun-moon-container,
.theme-switch__checkbox:checked + .theme-switch__container .theme-switch__sun-moon-container {
  background: radial-gradient(circle at 35% 35%, #f5f6f9 0%, #c9cdd6 70%);
  box-shadow: 0 0 10px rgba(255,255,255,.15);
}
body[data-theme="dark"] .theme-switch__moon,
.theme-switch__checkbox:checked + .theme-switch__container .theme-switch__moon {
  opacity: 1; transform: scale(1);
}
.theme-switch__spot {
  position: absolute;
  background: #a4a8b3;
  border-radius: 999px;
}
.theme-switch__spot:nth-child(1) { width: 5px; height: 5px; top: 4px; left: 4px; }
.theme-switch__spot:nth-child(2) { width: 3px; height: 3px; top: 10px; right: 4px; }
.theme-switch__spot:nth-child(3) { width: 2.5px; height: 2.5px; bottom: 4px; left: 7px; }

/* ─── tooltip helper for session-dot ─────────────────────── */
[data-tooltip] { position: relative; }
[data-tooltip]:hover::after,
[data-tooltip]:focus::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--text-primary);
  color: var(--bg);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  z-index: 100;
}

/* ─── NOTIFICACIONES (campana + dropdown) ─────────────────
   El <details> lleva también la clase .user-menu, así que hereda el
   posicionamiento del panel, la animación de apertura y el highlight
   deslizante (.nav-hl) que comparten sidebar y menú de usuario. */
.notif-menu { position: relative; }

/* Mismo material que la píldora de usuario: borde hairline sobre card. */
.notif-bell {
  list-style: none;
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hair);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.notif-bell::-webkit-details-marker { display: none; }
.notif-bell:hover { border-color: var(--hair-2); color: var(--text-secondary); }
.notif-menu[open] > .notif-bell { border-color: var(--hair-2); color: var(--text-secondary); }
.notif-bell__icon { display: inline-grid; place-items: center; }
.notif-bell__icon svg { width: 19px; height: 19px; }

.notif-bell__badge {
  position: absolute;
  top: -3px; right: -3px;
  min-width: 17px; height: 17px;
  padding: 0 4px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg);
  background: var(--error);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--font-weight-medium);
  line-height: 1;
  letter-spacing: -0.02em;
  animation: notif-badge-in var(--transition-normal) cubic-bezier(.22, 1, .36, 1) both;
}
@keyframes notif-badge-in {
  from { opacity: 0; transform: scale(.5); }
  to   { opacity: 1; transform: scale(1); }
}

/* ─── Panel ─────────────────────────────────────────────── */
.notif-panel {
  width: min(340px, calc(100vw - 32px));
  padding: 0;
  overflow: hidden;
  transform: translateY(-6px) scale(.985);
  transform-origin: top right;
  transition:
    opacity 190ms cubic-bezier(.2,.7,.2,1),
    transform 260ms cubic-bezier(.22, 1, .36, 1);
}
.user-menu.is-open .notif-panel { transform: none; }
/* El panel de usuario se muestra con [open] (sin animación de entrada). Acá
   la entrada sí se anima, así que mientras el JS no agregó .is-open el panel
   arranca oculto y desplazado. */
.notif-menu[open]:not(.is-open) .notif-panel {
  opacity: 0;
  transform: translateY(-6px) scale(.985);
}
.user-menu.is-closing .notif-panel { transform: translateY(-6px) scale(.985); }

.notif-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--hair);
}
.notif-panel__title {
  font-size: 15px;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}
.notif-panel__actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.notif-panel__action {
  border: 0;
  padding: 0;
  background: none;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}
.notif-panel__action:hover { color: var(--text-primary); }
.notif-panel__clear {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.notif-panel__clear:hover { background: var(--hair); color: var(--text-primary); }
.notif-panel__clear:disabled { cursor: wait; opacity: .6; }
.notif-panel__clear svg { width: 15px; height: 15px; }

.notif-panel__list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px;
  max-height: min(58vh, 420px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* Estado vacío: gris claro, sin peso visual. */
.notif-empty {
  margin: 0;
  padding: 26px 14px;
  text-align: center;
  font-size: 14px;
  color: var(--text-faint);
}

/* ─── Item ──────────────────────────────────────────────── */
.notif-item {
  align-items: flex-start;
  gap: 9px;
  padding: 10px 12px;
}
.notif-item__dot {
  width: 6px; height: 6px;
  margin-top: 7px;
  flex: none;
  border-radius: var(--radius-pill);
  background: var(--error);
  opacity: 0;
}
.notif-item--warning .notif-item__dot { background: var(--warning); }
.notif-item--error .notif-item__dot { background: var(--error); }
.notif-item.is-unread .notif-item__dot { opacity: 1; }
.notif-item__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.notif-item__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.notif-item__title {
  font-size: 14.5px;
  font-weight: var(--font-weight-medium);
  color: color-mix(in oklab, var(--text-primary) 75%, transparent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.notif-item.is-unread .notif-item__title { color: var(--text-primary); }
.notif-item--warning.is-unread .notif-item__title { color: var(--warning); }
.notif-item--error.is-unread .notif-item__title { color: var(--error); }
.notif-item__date {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
}
.notif-item__text {
  font-size: 13px;
  line-height: var(--line-height-snug);
  color: var(--text-muted);
}

/* Entrada escalonada de los items al abrir el panel. */
.user-menu.is-open .notif-item {
  animation: notif-item-in 260ms cubic-bezier(.22, 1, .36, 1) both;
}
.user-menu.is-open .notif-item:nth-child(2) { animation-delay: 35ms; }
.user-menu.is-open .notif-item:nth-child(3) { animation-delay: 70ms; }
.user-menu.is-open .notif-item:nth-child(4) { animation-delay: 105ms; }
.user-menu.is-open .notif-item:nth-child(n+5) { animation-delay: 140ms; }
@keyframes notif-item-in {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: none; }
}

@media (max-width: 480px) {
  .notif-panel { width: calc(100vw - 32px); }
}

/* Nivel 3: el aviso propio del usuario (columna "Notificarme"). Es el menos
   urgente de los tres, asi que va en el color de informacion y no en ambar. */
.notif-item--info .notif-item__dot { background: var(--info); }
.notif-item--info.is-unread .notif-item__title { color: var(--info); }

/* "Cerrar sesión" es un botón dentro de un form (POST + CSRF). */
.user-menu__logout { margin: 0; }
.user-menu__logout .user-menu__item {
  width: 100%;
  border: 0;
  background: none;
  font: inherit;
  font-size: 15.5px;
  text-align: left;
}
.user-menu__logout .user-menu__item:hover {
  background: color-mix(in oklab, var(--error) 8%, transparent);
}