:root {
  --fondo: #0f1419;
  --panel: #161c23;
  --borde: #263140;
  --texto: #e6edf3;
  --tenue: #8b98a5;
  --acento: #3fb950;
  --alerta: #d29922;
  --error: #f85149;
  --radio: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--fondo);
  color: var(--texto);
  font-family: ui-sans-serif, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
}

.barra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--borde);
  background: var(--panel);
}

.marca {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #2ea043, #1f6feb);
  font-weight: 700;
}

.marca h1 {
  margin: 0;
  font-size: 16px;
}

.marca p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--tenue);
}

.estado {
  font-size: 12px;
  color: var(--tenue);
  border: 1px solid var(--borde);
  padding: 5px 10px;
  border-radius: 999px;
}

main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  min-height: 0;
}

.chat {
  overflow-y: auto;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mensaje {
  display: flex;
}

.mensaje.yo {
  justify-content: flex-end;
}

.burbuja {
  max-width: 74%;
  padding: 11px 14px;
  border-radius: var(--radio);
  line-height: 1.5;
  white-space: pre-wrap;
  border: 1px solid var(--borde);
}

.mensaje.bot .burbuja {
  background: var(--panel);
}

.mensaje.yo .burbuja {
  background: #1f6feb;
  border-color: #1f6feb;
}

.mensaje.pensando .burbuja {
  color: var(--tenue);
}

.punto {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 4px;
  border-radius: 50%;
  background: var(--tenue);
  animation: latir 1.2s infinite ease-in-out;
}

.punto:nth-child(2) {
  animation-delay: 0.2s;
}
.punto:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes latir {
  0%, 80%, 100% { opacity: 0.25; }
  40% { opacity: 1; }
}

.panel {
  border-left: 1px solid var(--borde);
  background: var(--panel);
  overflow-y: auto;
  padding: 16px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tenue);
}

#toolcalls {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#toolcalls li {
  border: 1px solid var(--borde);
  border-left-width: 3px;
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 12px;
}

#toolcalls li.ok {
  border-left-color: var(--acento);
}

#toolcalls li.error {
  border-left-color: var(--error);
}

#toolcalls li.vacio {
  border-left-color: var(--borde);
  color: var(--tenue);
}

.tool-nombre {
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.tool-args {
  color: var(--tenue);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  margin: 4px 0;
  word-break: break-all;
}

.tool-resultado {
  color: var(--texto);
  word-break: break-word;
}

.barra-entrada {
  border-top: 1px solid var(--borde);
  background: var(--panel);
  padding: 12px 20px 16px;
}

.fila {
  display: flex;
  gap: 10px;
}

input {
  flex: 1;
  background: var(--fondo);
  border: 1px solid var(--borde);
  color: var(--texto);
  border-radius: var(--radio);
  padding: 11px 13px;
  font-size: 14px;
}

input:focus {
  outline: none;
  border-color: #1f6feb;
}

button {
  background: var(--acento);
  color: #06240d;
  border: 0;
  border-radius: var(--radio);
  padding: 11px 20px;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

.confirmacion {
  border: 1px solid var(--alerta);
  background: rgba(210, 153, 34, 0.12);
  color: #f0c674;
  border-radius: var(--radio);
  padding: 10px 13px;
  margin-bottom: 10px;
  font-size: 13px;
}

.confirmacion strong {
  margin-right: 6px;
}

.oculto {
  display: none;
}

@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }

  .panel {
    display: none;
  }
}