*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* El atributo hidden debe ganarle a los display:flex de #login/#chat */
[hidden] {
  display: none !important;
}

.logo {
  display: block;
  width: 88px;
  height: 88px;
  object-fit: contain;
  margin: 0 auto 0.25rem;
}
.subtitulo {
  font-size: 0.82rem;
  color: #888;
  text-align: center;
}
.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.2rem 0 0.4rem;
  font-weight: 600;
  color: #00499c;
  font-size: 0.95rem;
}
.brand img {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  background: #f5f5f5;
  color: #1a1a1a;
  min-height: 100vh;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Login ────────────────────────────────── */
#login {
  margin: auto;
  width: 100%;
  max-width: 360px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

#login h1 {
  font-size: 1.4rem;
  font-weight: 600;
  text-align: center;
  color: #111;
}

#login p {
  font-size: 0.9rem;
  color: #555;
  text-align: center;
}

#pwd {
  padding: 0.55rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

#pwd:focus {
  border-color: #4a7cf6;
}

#entrar {
  padding: 0.6rem;
  background: #4a7cf6;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

#entrar:hover {
  background: #3a6ce0;
}

.error {
  color: #c0392b;
  font-size: 0.85rem;
  text-align: center;
}

/* ── Chat ─────────────────────────────────── */
#chat {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
}

#chat header {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
}

#chat header label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #444;
  font-weight: 500;
}

#manual {
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
  outline: none;
  flex: 1;
}

#manual:focus {
  border-color: #4a7cf6;
}

/* ── Message list ─────────────────────────── */
#mensajes {
  flex: 1;
  min-height: 320px;
  max-height: 60vh;
  overflow-y: auto;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.msg {
  max-width: 80%;
  padding: 0.6rem 0.85rem;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user {
  align-self: flex-end;
  background: #4a7cf6;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.bot {
  align-self: flex-start;
  background: #f0f0f0;
  color: #1a1a1a;
  border-bottom-left-radius: 4px;
}

/* ── Input row ────────────────────────────── */
#form {
  display: flex;
  gap: 0.5rem;
}

#pregunta {
  flex: 1;
  padding: 0.6rem 0.85rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

#pregunta:focus {
  border-color: #4a7cf6;
}

#form button {
  padding: 0.6rem 1.1rem;
  background: #4a7cf6;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

#form button:hover {
  background: #3a6ce0;
}

/* ── Responsive ───────────────────────────── */
@media (max-width: 480px) {
  #app {
    padding: 0.5rem;
  }

  .msg {
    max-width: 95%;
  }
}