:root {
  --bosque: #1f3d2b;
  --bosque-2: #2c5a3e;
  --musgo: #6f8f5b;
  --oro: #e2b04a;
  --crema: #f5efe1;
  --papel: #fbf8f1;
  --tinta: #1d2a22;
  --tinta-suave: #5b6a60;
  --linea: #e3dccb;
  --radio: 18px;
  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Nunito Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: var(--sans);
  color: var(--tinta);
  background: var(--papel);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* Layout: panel lateral + chat, ocupando siempre la altura de la ventana */
.app {
  display: grid;
  grid-template-columns: 340px 1fr;
  height: 100dvh;
}

/* ---------- Panel informativo ---------- */
.panel {
  background:
    radial-gradient(circle at 110% -10%, rgba(226, 176, 74, 0.18), transparent 45%),
    linear-gradient(180deg, var(--bosque) 0%, #18301f 100%);
  color: var(--crema);
  padding: 28px 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* Logo oficial como única identidad del encabezado: tamaño fijo, sin deformar. */
.panel__brand { display: flex; }
.panel__brand img {
  display: block;
  width: 180px;
  height: auto;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
}
.panel__intro { margin: 0; line-height: 1.55; color: rgba(245, 239, 225, 0.85); font-size: 0.95rem; }

.panel__principle {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--oro);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 0 12px 12px 0;
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.45;
}

.panel__section h2 {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--oro);
}

.perfil { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.perfil li {
  font-size: 0.82rem;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.perfil li b { color: var(--oro); font-weight: 700; margin-right: 4px; }
.perfil li.perfil__vacio { background: none; border: none; padding: 0; color: rgba(245, 239, 225, 0.6); font-style: italic; }

.solicitud {
  background: var(--crema);
  color: var(--tinta);
  border-radius: 12px;
  padding: 14px;
  font-size: 0.86rem;
  line-height: 1.5;
}
.solicitud p { margin: 0 0 8px; }
.solicitud p:last-child { margin: 0; }
.solicitud .estado { font-weight: 700; color: var(--bosque-2); }
.solicitud .faltan { color: #8a5a12; }

.panel__facts ul { margin: 0; padding-left: 18px; line-height: 1.6; font-size: 0.88rem; color: rgba(245, 239, 225, 0.85); }

.panel__reset {
  margin-top: auto;
  align-self: flex-start;
  background: transparent;
  color: var(--crema);
  border: 1px solid rgba(245, 239, 225, 0.35);
  border-radius: 999px;
  padding: 8px 16px;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.panel__reset:hover { border-color: var(--oro); color: var(--oro); }

/* ---------- Chat ---------- */
.chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100dvh;
  background:
    radial-gradient(circle at 100% 0%, rgba(111, 143, 91, 0.08), transparent 40%),
    var(--papel);
}

.chat__header {
  flex: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--linea);
  background: rgba(251, 248, 241, 0.9);
  backdrop-filter: blur(6px);
}
.chat__title { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--tinta-suave); }
.chat__status { width: 8px; height: 8px; border-radius: 50%; background: var(--musgo); box-shadow: 0 0 0 3px rgba(111, 143, 91, 0.2); }
.chat__toggle { display: none; }
.chat__volver {
  margin-left: auto;
  flex: none;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bosque);
  color: var(--crema);
  font-weight: 700; font-size: 0.88rem;
  text-decoration: none;
  white-space: nowrap;
}
.chat__volver:hover { background: var(--bosque-2); }
.chat__volver:focus-visible { outline: 3px solid var(--oro); outline-offset: 2px; }

/* Área de conversación con scroll independiente */
.chat__scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 28px 28px 12px;
  scroll-behavior: smooth;
}

.mensajes {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.msg { display: flex; gap: 10px; align-items: flex-end; animation: entrar 0.25s ease-out; }
.msg--user { justify-content: flex-end; }
.msg__avatar {
  flex: none;
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(31, 61, 43, 0.18);
}
.msg__burbuja {
  max-width: min(78%, 620px);
  padding: 12px 16px;
  border-radius: var(--radio);
  line-height: 1.55;
  font-size: 0.97rem;
  overflow-wrap: anywhere;
}
.msg--assistant .msg__burbuja {
  background: #fff;
  border: 1px solid var(--linea);
  border-bottom-left-radius: 6px;
  box-shadow: 0 1px 2px rgba(31, 61, 43, 0.05);
}
.msg--user .msg__burbuja {
  background: var(--bosque);
  color: var(--crema);
  border-bottom-right-radius: 6px;
}
.msg--error .msg__burbuja { background: #fdf1ee; border-color: #f0c7bc; color: #7a2e1d; }
.msg__burbuja p { margin: 0 0 8px; }
.msg__burbuja p:last-child, .msg__burbuja ul:last-child, .msg__burbuja ol:last-child { margin-bottom: 0; }
.msg__burbuja ul, .msg__burbuja ol { margin: 0 0 8px; padding-left: 20px; }
.msg__burbuja li { margin-bottom: 3px; }
.msg__burbuja strong { color: var(--bosque-2); }
.msg--user .msg__burbuja strong { color: var(--oro); }

.escribiendo { display: inline-flex; gap: 4px; padding: 4px 0; }
.escribiendo span {
  width: 7px; height: 7px; border-radius: 50%; background: var(--musgo);
  animation: punto 1.2s infinite ease-in-out;
}
.escribiendo span:nth-child(2) { animation-delay: 0.15s; }
.escribiendo span:nth-child(3) { animation-delay: 0.3s; }

.sugerencias {
  max-width: 760px;
  margin: 18px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 42px;
}
.sugerencias[hidden] { display: none; }
.sugerencias button {
  font: inherit;
  font-size: 0.88rem;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--linea);
  background: #fff;
  color: var(--bosque);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.sugerencias button:hover { border-color: var(--musgo); background: var(--crema); }

/* Caja de escritura siempre visible abajo */
.composer {
  flex: none;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  width: 100%;
  max-width: 816px;
  margin: 0 auto;
  padding: 12px 28px calc(16px + env(safe-area-inset-bottom));
}
.composer textarea {
  flex: 1;
  resize: none;
  font: inherit;
  font-size: 1rem;
  line-height: 1.45;
  max-height: 160px;
  padding: 12px 16px;
  border-radius: 22px;
  border: 1px solid var(--linea);
  background: #fff;
  color: var(--tinta);
  outline: none;
  box-shadow: 0 2px 10px rgba(31, 61, 43, 0.06);
}
.composer textarea:focus { border-color: var(--musgo); box-shadow: 0 0 0 3px rgba(111, 143, 91, 0.18); }
.composer button {
  flex: none;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--bosque);
  color: var(--oro);
  display: grid; place-items: center;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.composer button:hover { background: var(--bosque-2); }
.composer button:active { transform: scale(0.95); }
.composer button:disabled { opacity: 0.5; cursor: wait; }

@keyframes entrar { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes punto { 0%, 80%, 100% { opacity: 0.3; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

/* ---------- Móvil: el panel se vuelve un cajón desplegable ---------- */
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .panel {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(88vw, 360px);
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 8px 0 30px rgba(0, 0, 0, 0.25);
  }
  .app.panel-abierto .panel { transform: none; }
  .app.panel-abierto::after {
    content: '';
    position: fixed; inset: 0;
    background: rgba(20, 30, 24, 0.45);
    z-index: 10;
  }
  .chat__header { padding: 10px 14px; }
  .chat__title { display: none; }
  .chat__toggle {
    display: flex; align-items: center; gap: 10px;
    background: none; border: none; padding: 0;
    font: inherit; font-family: var(--serif); font-weight: 700; font-size: 1.05rem;
    color: var(--bosque); cursor: pointer;
  }
  .chat__volver { padding: 7px 11px; font-size: 0.82rem; }
  .chat__toggle-hint {
    font-family: var(--sans); font-weight: 600; font-size: 0.75rem;
    color: var(--tinta-suave); border: 1px solid var(--linea);
    border-radius: 999px; padding: 3px 9px;
  }
  .chat__scroll { padding: 18px 14px 8px; }
  .sugerencias { padding-left: 0; }
  .msg__burbuja { max-width: 86%; }
  .composer { padding: 10px 14px calc(12px + env(safe-area-inset-bottom)); }
}

/* Pantallas muy angostas: se oculta la pista "Ver panel" para que «Volver a BTA» quepa en la cabecera */
@media (max-width: 420px) {
  .chat__toggle-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}