/* Asistente de IA — marca etendo.ai: noche para el chrome, azul para la acción, lima como acento sobre noche.
   Al abrirse, la conversación ocupa todo el espacio bajo la cabecera y sustituye al contenido de la página. */

#etendo-chat { font-family: var(--md-text-font); --etendo-chat-top: 3rem; }

/* ---------- Botón flotante ---------- */
.etendo-chat__fab {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 60;
  height: 3.25rem; padding: 0 1.1rem 0 .95rem;
  display: flex; align-items: center; gap: .55rem;
  border: 0; border-radius: 999px;
  background: var(--brand-night); color: var(--brand-lime);
  box-shadow: 0 6px 18px rgba(27,26,31,.28);
  font: inherit; font-size: .7rem; font-weight: 600; white-space: nowrap;
  cursor: pointer;
  transition: transform .18s ease-out, box-shadow .18s ease-out, opacity .18s ease-out;
}
.etendo-chat__fab span { color: #fff; }
.etendo-chat__fab:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(27,26,31,.34); }
.etendo-chat__fab:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(184,250,80,.45); }
.etendo-chat__fab svg { width: 1.4rem; height: 1.4rem; flex-shrink: 0; }
[data-md-color-scheme="slate"] .etendo-chat__fab { border: 1px solid rgba(255,255,255,.14); }
.is-open .etendo-chat__fab { opacity: 0; pointer-events: none; transform: scale(.9); }

/* ---------- Vista de conversación ---------- */
/* Sustituye al contenido de la página: se oculta el contenido y el chat ocupa su lugar, con el scroll de la página */
html.etendo-chat-open .md-main,
html.etendo-chat-open .md-footer,
html.etendo-chat-open .md-top { display: none !important; }
/* El navegador no reajusta el scroll solo cuando crece la respuesta: la posición la decide el widget */
html.etendo-chat-open { overflow-anchor: none; }

.etendo-chat__panel {
  display: none; flex-direction: column;
  min-height: calc(100vh - var(--etendo-chat-top));
  min-height: calc(100dvh - var(--etendo-chat-top));   /* Safari iOS: la barra de direcciones cambia la altura útil */
  background: var(--etendo-bg-content); color: var(--etendo-text);
}
.is-open .etendo-chat__panel { display: flex; animation: etendo-chat-open .24s ease-out both; }
@keyframes etendo-chat-open { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }

.etendo-chat__header {
  display: flex; align-items: center; gap: .25rem;
  padding: .7rem 1.25rem;
  border-bottom: 1px solid var(--etendo-border);
  background: var(--etendo-bg-content);
  position: sticky; top: var(--etendo-chat-stick, 0px); z-index: 2;   /* queda bajo la cabecera de Material */
}
.etendo-chat__title { flex: 1; font-size: .8rem; font-weight: 500; line-height: 1.2; color: var(--etendo-text-muted); }
.etendo-chat__title strong { font-weight: 800; letter-spacing: -.02em; font-size: .8rem; color: var(--etendo-text); }
.etendo-chat__title span {
  display: block; margin-top: .15rem;
  font-family: var(--etendo-font-label); font-size: .65rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--etendo-accent);
}
.etendo-chat__icon-btn {
  width: 1.7rem; height: 1.7rem; padding: .4rem;   /* icono de 18 px */
  border: 0; border-radius: var(--etendo-radius-sm);
  background: transparent; color: var(--etendo-text-muted); cursor: pointer;
}
.etendo-chat__icon-btn:hover { background: var(--etendo-bg-surface); color: var(--etendo-text); }
.etendo-chat__icon-btn svg { width: 100%; height: 100%; }

.etendo-chat__scroll { flex: 1; background: var(--etendo-bg-page); }
.etendo-chat__thread {
  max-width: 46rem; margin: 0 auto; padding: 1.5rem 1.25rem;
  min-height: 100%; display: flex; flex-direction: column; gap: 1rem;
}

/* Estado vacío: sustituye al hero del home */
.etendo-chat__hero { margin: auto; padding: 2rem 0; text-align: center; }
.etendo-chat__hero h2 {
  margin: 0 0 .5rem; border: 0; padding: 0;
  font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; line-height: 1.2; color: var(--etendo-text);
}
.etendo-chat__hero p { margin: 0 auto 1.4rem; max-width: 30rem; font-size: .8rem; color: var(--etendo-text-muted); }

.etendo-chat__chips { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; }
.etendo-chat__chips button {
  padding: .55rem .95rem; text-align: left;
  border: 1px solid var(--etendo-border-2); border-radius: var(--etendo-radius-lg);
  background: var(--etendo-bg-content); color: var(--etendo-text);
  font: inherit; font-size: .72rem; line-height: 1.4; cursor: pointer;
  transition: border-color .14s ease-out, box-shadow .14s ease-out;
}
.etendo-chat__chips button:hover { border-color: var(--etendo-accent); color: var(--etendo-accent); box-shadow: var(--etendo-shadow-md); }

/* Mensajes */
.etendo-chat__msg {
  font-size: .75rem; line-height: 1.6; overflow-wrap: anywhere;
  animation: etendo-chat-in .22s ease-out both;
}
.etendo-chat__msg p { margin: 0 0 .6em; }
.etendo-chat__msg p:last-child, .etendo-chat__msg ol:last-child, .etendo-chat__msg ul:last-child { margin-bottom: 0; }
.etendo-chat__msg ol, .etendo-chat__msg ul { margin: 0 0 .6em; padding-left: 1.3rem; }
.etendo-chat__msg li { margin: .2em 0; }
.etendo-chat__msg code { padding: .05em .3em; border-radius: 4px; background: var(--etendo-bg-surface); font-size: .68rem; }

.etendo-chat__msg--assistant { align-self: stretch; max-width: 100%; color: var(--etendo-text); }
.etendo-chat__msg--assistant a { color: var(--etendo-accent); text-decoration: underline; text-underline-offset: 2px; }
.etendo-chat__msg--user {
  align-self: flex-end; max-width: 85%;
  padding: .6rem .95rem;
  background: var(--brand-blue); color: #fff;
  border-radius: var(--etendo-radius-lg); border-bottom-right-radius: 4px;
}
.etendo-chat__msg--error {
  padding: .6rem .95rem; border: 1px solid var(--etendo-warn-border);
  border-radius: var(--etendo-radius-md); background: var(--etendo-warn-bg); color: var(--etendo-warn-fg);
}
@keyframes etendo-chat-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.etendo-chat__typing { display: inline-flex; gap: .25rem; padding: .3rem 0; }
.etendo-chat__typing i {
  width: .45rem; height: .45rem; border-radius: 50%; background: var(--etendo-text-muted);
  animation: etendo-chat-dot 1.2s infinite ease-in-out;
}
.etendo-chat__typing i:nth-child(2) { animation-delay: .15s; }
.etendo-chat__typing i:nth-child(3) { animation-delay: .3s; }
@keyframes etendo-chat-dot { 0%, 80%, 100% { opacity: .3; transform: scale(.8); } 40% { opacity: 1; transform: scale(1); } }

/* ---------- Sugerencias al escribir ---------- */
.etendo-chat__suggest {
  position: absolute; left: 0; right: 0; bottom: 100%;
  width: min(46rem, calc(100% - 2.5rem)); margin: 0 auto .4rem; padding: .3rem; list-style: none;
  background: var(--etendo-bg-content);
  border: 1px solid var(--etendo-border-2); border-radius: var(--etendo-radius-lg);
  box-shadow: var(--etendo-shadow-md);
  animation: etendo-chat-in .14s ease-out both;
}
.etendo-chat__suggest[hidden] { display: none; }
.etendo-chat__suggest li {
  margin: 0; padding: .5rem .75rem;
  border-radius: var(--etendo-radius-md);
  font-size: .7rem; line-height: 1.4; color: var(--etendo-text-2); cursor: pointer;
}
.etendo-chat__suggest li:hover, .etendo-chat__suggest li.is-active { background: var(--etendo-accent-soft); color: var(--etendo-text); }
.etendo-chat__suggest mark { background: transparent; color: var(--etendo-accent); font-weight: 700; }

/* ---------- Campo de entrada ---------- */
.etendo-chat__dock {
  position: sticky; bottom: 0; z-index: 3;
  padding: .75rem 1.25rem .6rem; border-top: 1px solid var(--etendo-border);
  background: var(--etendo-bg-content);
}
.etendo-chat__form {
  max-width: 46rem; margin: 0 auto;
  display: flex; align-items: flex-end; gap: .5rem;
  padding: .45rem .5rem .45rem .9rem;
  border: 1px solid var(--etendo-border-2); border-radius: var(--etendo-radius-lg);
  background: var(--etendo-bg-content);
}
.etendo-chat__form:focus-within { border-color: var(--etendo-accent); box-shadow: var(--etendo-shadow-focus); }
.etendo-chat__form textarea {
  flex: 1; resize: none; max-height: 140px; padding: .35rem 0;
  border: 0; background: transparent; color: var(--etendo-text);
  font: inherit; font-size: .75rem; line-height: 1.5;   /* 15 px */
  -webkit-appearance: none; appearance: none; border-radius: 0;   /* sin el estilo propio de iOS */
}
.etendo-chat__form textarea:focus { outline: none; }
.etendo-chat__send {
  width: 2.2rem; height: 2.2rem; padding: .5rem; flex-shrink: 0;
  border: 0; border-radius: var(--etendo-radius-md);
  background: var(--brand-blue); color: #fff; cursor: pointer;
}
.etendo-chat__send:hover { opacity: .88; }
.etendo-chat__send svg { width: 100%; height: 100%; }

.etendo-chat__note {
  max-width: 46rem; margin: .5rem auto 0;
  color: var(--etendo-text-muted); font-size: .65rem; line-height: 1.4; text-align: center;
}

@media (max-width: 600px) {
  /* iOS hace zoom al enfocar campos de menos de 16 px: en móvil el campo del chat es de 16 px */
  .etendo-chat__form textarea { font-size: 16px; }
  .etendo-chat__suggest li { padding: .65rem .8rem; }   /* zona táctil más cómoda */
  .etendo-chat__fab { right: .9rem; bottom: .9rem; height: 3rem; }
  .etendo-chat__fab span { display: none; }
  .etendo-chat__fab { width: 3rem; padding: 0; justify-content: center; }
  .etendo-chat__thread { padding: 1rem .9rem; }
  .etendo-chat__hero h2 { font-size: 1.35rem; }
  .etendo-chat__msg--user { max-width: 92%; }
}

@media (prefers-reduced-motion: reduce) {
  .etendo-chat__panel, .etendo-chat__fab, .etendo-chat__msg { transition: none; animation: none; }
}