/* ═══════════════════════════════════════════════════
   ELECTIVE AFFINITIES — Filtros en cascada
   Estética: tipografía fina, paneles oscuros, guiones bajos
   ═══════════════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --ea-font: 'Times New Roman', Times, Georgia, serif;
  --ea-font-ui: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --ea-color-text: #1a1a1a;
  --ea-color-muted: #888;
  --ea-panel-bg: #1c1c1c;
  --ea-panel-text: #e8e8e8;
  --ea-panel-hover: #2e2e2e;
  --ea-panel-active: #3a3a3a;
  --ea-panel-border: rgba(255,255,255,0.08);
  --ea-accent: #c8b89a;       /* tono cálido tierra */
  --ea-speed: 180ms;
}

/* ── Contenedor principal ── */
.ea-filtros {
  font-family: var(--ea-font-ui);
  font-size: 13px;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 100;
}

.ea-filtros__lista {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ea-filtros__item {
  position: relative;
}

/* ── Botones de filtro (nivel 0) ── */
.ea-filtros__btn {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font-family: var(--ea-font-ui);
  font-size: 13px;
  font-weight: 400;
  color: var(--ea-color-text);
  letter-spacing: 0.02em;
  display: block;
  width: 100%;
  text-align: left;
  line-height: 1.8;
  transition: color var(--ea-speed);
}

.ea-filtros__btn:hover,
.ea-filtros__btn[aria-expanded="true"] {
  color: #000;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.ea-filtros__btn[aria-expanded="true"] {
  font-weight: 500;
}

/* ── Panel oscuro base ── */
.ea-panel {
  position: absolute;
  top: 0;
  left: 100%;
  margin-left: 24px;
  background: var(--ea-panel-bg);
  color: var(--ea-panel-text);
  min-width: 220px;
  max-height: 70vh;
  overflow-y: auto;
  z-index: 200;

  /* Animación de entrada */
  opacity: 0;
  transform: translateX(-6px);
  pointer-events: none;
  transition:
    opacity var(--ea-speed) ease,
    transform var(--ea-speed) ease;
}

.ea-panel:not([hidden]) {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

/* Scrollbar sutil */
.ea-panel::-webkit-scrollbar { width: 3px; }
.ea-panel::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); }

/* ── Panel de proyectos (nivel 2) ── */
.ea-panel--proyectos {
  left: 100%;
  margin-left: 1px;  /* borde entre paneles */
  top: 0;
  min-width: 260px;
  border-left: 1px solid var(--ea-panel-border);
}

/* ── Lista dentro de panel ── */
.ea-panel__lista {
  list-style: none;
  margin: 0;
  padding: 8px 0;
}

/* ── Ítem de arquitecto ── */
.ea-panel__item {
  display: block;
}

.ea-panel__btn {
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  padding: 7px 20px;
  cursor: pointer;
  font-family: var(--ea-font-ui);
  font-size: 12.5px;
  font-weight: 400;
  color: var(--ea-panel-text);
  letter-spacing: 0.01em;
  line-height: 1.4;
  transition: background var(--ea-speed), color var(--ea-speed);
  white-space: nowrap;
}

.ea-panel__btn:hover {
  background: var(--ea-panel-hover);
  color: #fff;
}

.ea-panel__btn.activo {
  background: var(--ea-panel-active);
  color: var(--ea-accent);
}

/* ── Ítem de proyecto ── */
.ea-panel__proyecto {
  display: block;
  padding: 9px 20px 8px;
  border-bottom: 1px solid var(--ea-panel-border);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--ea-speed);
}

.ea-panel__proyecto:hover {
  background: var(--ea-panel-hover);
}

.ea-panel__proyecto-titulo {
  display: block;
  font-family: var(--ea-font-ui);
  font-size: 12.5px;
  color: var(--ea-panel-text);
  line-height: 1.35;
  margin-bottom: 3px;
}

.ea-panel__proyecto-meta {
  display: block;
  font-family: var(--ea-font-ui);
  font-size: 11px;
  color: rgba(232,232,232,0.45);
  letter-spacing: 0.02em;
}

/* ── Estado de carga ── */
.ea-panel__cargando {
  padding: 14px 20px;
  font-size: 12px;
  color: rgba(232,232,232,0.4);
  font-style: italic;
}

/* ── Estado vacío ── */
.ea-panel__vacio {
  padding: 14px 20px;
  font-size: 12px;
  color: rgba(232,232,232,0.4);
}

/* ── Scrollbar personalizado (Firefox) ── */
.ea-panel {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
}

/* ── Responsive: en móvil los paneles van debajo ── */
@media (max-width: 768px) {
  .ea-panel {
    position: static;
    margin-left: 0;
    margin-top: 4px;
    max-height: 50vh;
  }
  .ea-panel--proyectos {
    margin-left: 0;
    border-left: none;
    border-top: 1px solid var(--ea-panel-border);
  }
}