/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --verde: #25d366;
  --verde-oscuro: #128c7e;
  --verde-panel: #075e54;
  --azul: #3b82f6;
  --gris-fondo: #f0f2f5;
  --gris-borde: #d1d5db;
  --gris-texto: #6b7280;
  --blanco: #ffffff;
  --negro: #111827;
  --rojo: #ef4444;
  --amarillo: #f59e0b;

  /* Burbujas */
  --burbuja-saliente: #dcf8c6;
  --burbuja-entrante: #ffffff;

  --radio: 8px;
  --sombra: 0 1px 3px rgba(0,0,0,0.12);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gris-fondo);
  color: var(--negro);
  font-size: 14px;
  line-height: 1.5;
}

/* ===== LOGIN ===== */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--verde-panel) 0%, var(--verde-oscuro) 100%);
}

.login-card {
  background: var(--blanco);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.login-logo {
  text-align: center;
  margin-bottom: 1.5rem;
}

.login-logo svg {
  width: 56px;
  height: 56px;
}

.login-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--verde-panel);
  margin-top: 0.5rem;
}

.login-logo p {
  font-size: 0.8rem;
  color: var(--gris-texto);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  color: var(--negro);
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--gris-borde);
  border-radius: var(--radio);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--verde);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: var(--radio);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  text-decoration: none;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--verde);
  color: var(--blanco);
  width: 100%;
}

.btn-primary:hover { background: var(--verde-oscuro); }

.btn-send {
  background: var(--verde);
  color: var(--blanco);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  padding: 0;
  flex-shrink: 0;
}

.btn-send:hover { background: var(--verde-oscuro); }

.error-msg {
  background: #fee2e2;
  color: var(--rojo);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radio);
  font-size: 0.82rem;
  margin-top: 0.75rem;
  display: none;
}

/* ===== PANEL PRINCIPAL ===== */
.panel-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Barra de cabecera del panel */
.panel-header {
  background: var(--verde-panel);
  color: var(--blanco);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  height: 60px;
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.panel-header .acciones {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  opacity: 0.85;
}

/* ===== COLUMNA IZQUIERDA: Lista de leads ===== */
.sidebar {
  width: 340px;
  flex-shrink: 0;
  background: var(--blanco);
  border-right: 1px solid var(--gris-borde);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  background: var(--verde-panel);
  color: var(--blanco);
  padding: 0.85rem 1rem;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.sidebar-search {
  padding: 0.5rem;
  background: var(--gris-fondo);
  flex-shrink: 0;
}

.sidebar-search input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--gris-borde);
  border-radius: 20px;
  font-size: 0.85rem;
  outline: none;
  background: var(--blanco);
}

.sidebar-search input:focus { border-color: var(--verde); }

.leads-list {
  flex: 1;
  overflow-y: auto;
}

.lead-item {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--gris-fondo);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: background 0.15s;
}

.lead-item:hover { background: var(--gris-fondo); }
.lead-item.activo { background: #e9f5f1; border-left: 3px solid var(--verde); }

.lead-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--verde-oscuro);
  color: var(--blanco);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.lead-info { flex: 1; min-width: 0; }

.lead-nombre {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lead-tel {
  font-size: 0.78rem;
  color: var(--gris-texto);
}

.lead-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
  flex-shrink: 0;
}

.lead-hora {
  font-size: 0.72rem;
  color: var(--gris-texto);
}

/* Badges de estado */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.badge-nuevo     { background: #e5e7eb; color: #374151; }
.badge-contactado { background: #dbeafe; color: #1d4ed8; }
.badge-interesado { background: #d1fae5; color: #065f46; }
.badge-descartado { background: #fee2e2; color: #991b1b; }

/* ===== COLUMNA DERECHA: Chat ===== */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-vacio {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--gris-texto);
  gap: 0.75rem;
}

.chat-vacio svg { opacity: 0.3; }
.chat-vacio p { font-size: 0.9rem; }

.chat-header {
  background: var(--gris-fondo);
  border-bottom: 1px solid var(--gris-borde);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.chat-header .lead-avatar { width: 40px; height: 40px; font-size: 0.9rem; }

.chat-header-info { flex: 1; }
.chat-header-info strong { display: block; font-size: 0.95rem; }
.chat-header-info span { font-size: 0.78rem; color: var(--gris-texto); }

.chat-mensajes {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23d1d5db' fill-opacity='0.15'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") var(--gris-fondo);
}

.burbuja-wrapper {
  display: flex;
  margin-bottom: 0.2rem;
}

.burbuja-wrapper.saliente { justify-content: flex-end; }
.burbuja-wrapper.entrante { justify-content: flex-start; }

.burbuja {
  max-width: 70%;
  padding: 0.55rem 0.85rem;
  border-radius: 12px;
  font-size: 0.88rem;
  position: relative;
  box-shadow: var(--sombra);
  word-break: break-word;
}

.burbuja.saliente {
  background: var(--burbuja-saliente);
  border-bottom-right-radius: 3px;
}

.burbuja.entrante {
  background: var(--burbuja-entrante);
  border-bottom-left-radius: 3px;
}

.burbuja.plantilla {
  background: #fffde7;
  border: 1px dashed var(--amarillo);
  font-style: italic;
  font-size: 0.8rem;
  color: var(--gris-texto);
}

.burbuja-hora {
  display: block;
  font-size: 0.68rem;
  color: var(--gris-texto);
  text-align: right;
  margin-top: 0.25rem;
}

.burbuja.boton-resp {
  background: #e0f2fe;
  border: 1px solid #7dd3fc;
  color: #075985;
}

/* Input de mensaje */
.chat-input-area {
  padding: 0.75rem 1rem;
  background: var(--gris-fondo);
  border-top: 1px solid var(--gris-borde);
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  flex-shrink: 0;
}

.chat-input-area textarea {
  flex: 1;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--gris-borde);
  border-radius: 22px;
  font-size: 0.9rem;
  resize: none;
  outline: none;
  min-height: 44px;
  max-height: 120px;
  font-family: inherit;
  line-height: 1.4;
  overflow-y: auto;
}

.chat-input-area textarea:focus { border-color: var(--verde); }

/* Indicador de carga */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: var(--blanco);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-leads {
  text-align: center;
  padding: 2rem;
  color: var(--gris-texto);
  font-size: 0.85rem;
}

/* Logout btn */
.btn-logout {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.5);
  color: var(--blanco);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: background 0.15s;
  white-space: nowrap;
}

.btn-logout:hover { background: rgba(255,255,255,0.15); }

/* Botón cargar leads */
.btn-cargar {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  color: var(--blanco);
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  transition: background 0.15s;
  white-space: nowrap;
}

.btn-cargar:hover:not(:disabled) { background: rgba(255,255,255,0.28); }
.btn-cargar:disabled { opacity: 0.55; cursor: not-allowed; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-box {
  background: var(--blanco);
  border-radius: 12px;
  padding: 1.75rem 2rem;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  text-align: center;
}

.modal-box h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--negro);
}

.modal-box p {
  font-size: 0.88rem;
  color: var(--gris-texto);
  margin-bottom: 0.4rem;
}

.modal-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--gris-fondo);
  font-size: 0.88rem;
}

.modal-stat:last-of-type { border-bottom: none; }

.modal-stat strong { color: var(--negro); }

.modal-progreso {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
}

.modal-progreso .spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--gris-borde);
  border-top-color: var(--verde);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.modal-progreso p {
  font-size: 0.9rem;
  color: var(--gris-texto);
  margin: 0;
}

.modal-errores {
  margin-top: 0.75rem;
  max-height: 100px;
  overflow-y: auto;
  background: #fef2f2;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-size: 0.78rem;
  color: var(--rojo);
}

.modal-footer {
  margin-top: 1.25rem;
}

.btn-modal-cerrar {
  background: var(--verde);
  color: var(--blanco);
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-modal-cerrar:hover { background: var(--verde-oscuro); }

/* ===== RESPONSIVE (móvil) ===== */
@media (max-width: 680px) {
  .sidebar {
    width: 100%;
    position: absolute;
    z-index: 10;
    top: 0; left: 0; right: 0; bottom: 0;
    transition: transform 0.3s;
  }

  .sidebar.oculta { transform: translateX(-100%); }

  .chat-area { width: 100%; }

  .btn-volver {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: transparent;
    border: none;
    color: var(--verde-oscuro);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0;
  }
}

@media (min-width: 681px) {
  .btn-volver { display: none; }
}