/* Área central del chat — sistema 4d3 */

.chat-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 32px 0 16px;
  scroll-behavior: smooth;
}

.chat-feed {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* -------------------------------------------------------------------------- */
/* Mensajes                                                                    */
/* -------------------------------------------------------------------------- */
.bubble-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.bubble-row.user { justify-content: flex-end; }
.bubble-row.iris { justify-content: flex-start; }

.bubble {
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  position: relative;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.9375rem;
}

/* Asistente: texto desnudo, sin caja, ocupa todo el ancho (estilo Claude). */
.bubble.iris {
  max-width: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

/* Usuario: burbuja compacta alineada a la derecha. */
.bubble.user {
  max-width: 80%;
  padding: 12px 16px;
  border: 1px solid var(--accent-soft);
  border-right: 3px solid var(--pastel-blue);
  border-radius: var(--radius-md);
  background: var(--bubble-user);
  box-shadow: var(--shadow-sm);
}

/* Segmentos de markdown intercalados con paneles (thinking / tool / code)
   en el bucle agéntico. Evita doble margen cuando hay segmento vacío. */
.bubble .md-segment:empty { display: none; }
.bubble .md-segment + .agent-panel,
.bubble .agent-panel + .md-segment {
  margin-top: 8px;
}

.bubble.iris.streaming::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-left: 4px;
  background: var(--pastel-green);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  animation: blink 950ms steps(1) infinite;
  vertical-align: middle;
}
@keyframes blink { 50% { opacity: 0; } }

/* Error: siempre en caja, con independencia del rol. Declarado tras
   `.bubble.iris` para que prevalezca en un error del asistente. */
.bubble.error {
  max-width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--danger);
  border-left: 3px solid var(--danger);
  border-radius: var(--radius-md);
  background: var(--danger-soft);
  color: var(--danger);
  box-shadow: none;
}

/* Etiqueta de rol: estructura el texto desnudo del asistente. En la burbuja
   del usuario es redundante (ya está alineada a la derecha) → oculta. */
.bubble .role-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pastel-green);
  margin-bottom: 6px;
}
.bubble.user .role-label { display: none; }
.bubble.error .role-label { display: block; color: var(--danger); }

.msg-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.msg-actions button {
  padding: 4px 8px;
  border-radius: 0;
  color: var(--fg-muted);
  background: transparent;
  transition: background var(--transition), color var(--transition);
}
.msg-actions button:hover { background: var(--bg-sunken); color: var(--accent-strong); }

/* -------------------------------------------------------------------------- */
/* Composer                                                                    */
/* -------------------------------------------------------------------------- */
.composer-wrap {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 14px 22px 18px;
}
.composer {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  transition: border-color var(--transition);
}
.composer:focus-within {
  border-color: var(--accent);
}
.composer textarea {
  border: none;
  outline: none;
  width: 100%;
  padding: 14px 16px 6px;
  resize: none;
  background: transparent;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.55;
  max-height: 40vh;
}
.composer textarea::placeholder {
  color: var(--fg-subtle);
}
.composer-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px 8px 10px;
}
.composer-row .send-btn { margin-left: auto; }

/* Botón "Adjuntar" — cuadrado neutro, mismo lenguaje que el indicador de kernel */
.composer-row .attach-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1.5px solid var(--border-strong);
  border-radius: 0;
  background: var(--bg-elev);
  color: var(--fg-muted);
  cursor: pointer;
  letter-spacing: 0;
  text-transform: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.composer-row .attach-btn:hover {
  background: var(--bg-sunken);
  color: var(--accent-strong);
  border-color: var(--pastel-blue);
}
.composer-row .attach-btn [data-lucide] { width: 0.9375rem; height: 0.9375rem; }

.composer-row .mode-toggle:not(.attach-btn) {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1.5px solid var(--accent-normal);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
  color: var(--accent-normal-strong);
  transition: background var(--transition), color var(--transition);
}
.composer-row .mode-toggle:not(.attach-btn):hover {
  background: var(--accent-normal-soft);
}
.composer-row .mode-toggle[data-mode="professional"] {
  border-color: var(--accent-pro);
  color: var(--accent-pro-strong);
}
.composer-row .mode-toggle[data-mode="professional"]:hover {
  background: var(--accent-pro-soft);
}
.composer-row .mode-toggle .glyph {
  width: 8px;
  height: 8px;
  background: currentColor;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  font-size: 0;
  flex: 0 0 auto;
}

.send-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  border: 1.5px solid var(--accent);
  border-radius: 0;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  transition: background var(--transition);
}
.send-btn:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.send-btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.send-btn.stop { background: var(--danger); border-color: var(--danger); }
.send-btn [data-lucide] { width: 0.875rem; height: 0.875rem; }

/* -------------------------------------------------------------------------- */
/* Quota                                                                       */
/* -------------------------------------------------------------------------- */
.quota-bar {
  max-width: 780px;
  margin: 10px auto 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-subtle);
  display: flex;
  align-items: center;
  gap: 12px;
}
.quota-bar .meter {
  flex: 1;
  height: 3px;
  background: var(--border);
  border-radius: 0;
  overflow: hidden;
}
.quota-bar .meter .fill {
  height: 100%;
  background: var(--accent);
  transition: width 250ms, background var(--transition);
  width: 0%;
}
.quota-bar.warn .meter .fill { background: var(--accent-pro); }
.quota-bar.danger .meter .fill { background: var(--danger); }
.quota-bar.danger { color: var(--danger); }

/* -------------------------------------------------------------------------- */
/* Welcome                                                                     */
/* -------------------------------------------------------------------------- */
.welcome {
  max-width: 720px;
  margin: 8vh auto 0;
  padding: 0 22px;
  text-align: center;
}
.welcome .section-number {
  display: inline-block;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--fg-subtle);
}
.welcome h1 {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
  color: var(--fg);
  margin: 0 0 12px;
  line-height: 1.2;
}
.welcome h1 strong {
  font-weight: 600;
  background: linear-gradient(
    90deg,
    var(--pastel-green) 0%,
    var(--pastel-blue) 50%,
    var(--pastel-coral) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.welcome p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-muted);
  margin: 0 0 36px;
}

.welcome .prompts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: 12px;
  text-align: left;
}
.welcome .prompts button {
  position: relative;
  padding: 14px 16px;
  border: 2px solid var(--pastel-green);
  border-radius: var(--radius-md);
  background: var(--bg-elev);
  color: var(--fg);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.875rem;
  line-height: 1.4;
  overflow: hidden;
  isolation: isolate;
  transition: color var(--transition), border-color var(--transition);
}
.welcome .prompts button::before {
  content: "";
  position: absolute;
  inset: 0;
  left: -100%;
  background: repeating-linear-gradient(
    0deg,
    var(--pastel-green) 0 2px,
    var(--dark-green) 2px 4px
  );
  transition: left var(--transition);
  z-index: -1;
}
.welcome .prompts button:hover { color: var(--white); }
.welcome .prompts button:hover::before { left: 0; }

/* Rotación de tríada — verde → azul → coral → verde */
.welcome .prompts button:nth-child(3n + 2) { border-color: var(--pastel-blue); }
.welcome .prompts button:nth-child(3n + 2)::before {
  background: repeating-linear-gradient(
    0deg,
    var(--pastel-blue) 0 2px,
    var(--dark-blue) 2px 4px
  );
}
.welcome .prompts button:nth-child(3n + 3) { border-color: var(--pastel-coral); }
.welcome .prompts button:nth-child(3n + 3)::before {
  background: repeating-linear-gradient(
    0deg,
    var(--pastel-coral) 0 2px,
    var(--dark-coral) 2px 4px
  );
}