/* Asistente de estudio: burbuja y panel de chat (usa los colores del tema, claro u oscuro) */
.shc-bubble {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 5;
  width: 3.4rem;
  height: 3.4rem;
  border: none;
  border-radius: 50%;
  background: var(--md-accent-fg-color);
  color: var(--md-accent-bg-color);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease;
}
.shc-bubble:hover { transform: scale(1.07); }
.shc-bubble.shc-hidden { display: none; }

.shc-panel {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 5;
  width: min(26rem, calc(100vw - 2rem));
  height: min(38rem, calc(100vh - 6rem));
  display: flex;
  flex-direction: column;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.8rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  font-size: 0.72rem;
}
.shc-panel[hidden] { display: none; }

.shc-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0.7rem 0.9rem;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
}
.shc-title { font-weight: 700; font-size: 0.8rem; }
.shc-context { opacity: 0.85; font-size: 0.62rem; margin-top: 0.15rem; }
.shc-actions { display: flex; gap: 0.3rem; }
.shc-icon-btn {
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.1rem 0.35rem;
  border-radius: 0.3rem;
}
.shc-icon-btn:hover { background: rgba(255, 255, 255, 0.15); }

.shc-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.shc-msg {
  max-width: 88%;
  padding: 0.55rem 0.75rem;
  border-radius: 0.7rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.shc-user {
  align-self: flex-end;
  background: var(--md-accent-fg-color--transparent);
  white-space: pre-wrap;
}
.shc-assistant {
  align-self: flex-start;
  background: var(--md-code-bg-color);
}
.shc-assistant p { margin: 0.3em 0; }
.shc-assistant pre {
  margin: 0.4em 0;
  padding: 0.5em;
  overflow-x: auto;
  font-size: 0.62rem;
  background: var(--md-default-bg-color);
  border-radius: 0.3rem;
}
.shc-assistant code { font-size: 0.9em; }
.shc-assistant ul, .shc-assistant ol { margin: 0.3em 0; padding-left: 1.2em; }
.shc-assistant table { font-size: 0.9em; border-collapse: collapse; }
.shc-assistant th, .shc-assistant td { border: 1px solid var(--md-default-fg-color--lightest); padding: 0.2em 0.4em; }
.shc-typing::after { content: "Pensando…"; opacity: 0.6; font-style: italic; }

.shc-notice {
  font-size: 0.64rem;
  opacity: 0.8;
  text-align: center;
  padding: 0.3rem 0.5rem;
}
.shc-notice.shc-error { color: #c62828; opacity: 1; }

.shc-footer {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  padding: 0.6rem;
}
.shc-chip {
  display: block;
  width: 100%;
  margin-bottom: 0.45rem;
  padding: 0.3rem 0.5rem;
  border: 1px dashed var(--md-accent-fg-color);
  border-radius: 0.4rem;
  background: transparent;
  color: var(--md-default-fg-color);
  font-size: 0.62rem;
  text-align: left;
  cursor: pointer;
}
.shc-chip[hidden] { display: none; }
.shc-row { display: flex; gap: 0.4rem; align-items: flex-end; }
.shc-input {
  flex: 1;
  resize: none;
  min-height: 2.4rem;
  max-height: 8rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 0.5rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font: inherit;
}
.shc-send {
  padding: 0.5rem 0.9rem;
  border: none;
  border-radius: 0.5rem;
  background: var(--md-accent-fg-color);
  color: var(--md-accent-bg-color);
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 480px) {
  .shc-panel { right: 0.5rem; bottom: 0.5rem; width: calc(100vw - 1rem); height: calc(100vh - 5rem); }
}

@media print {
  .shc-bubble, .shc-panel { display: none !important; }
}