:root {
  color-scheme: dark;
  --fondo: #0f172a;
  --fondo-claro: #1e293b;
  --fondo-tarjeta: #16213b;
  --texto: #e2e8f0;
  --texto-secundario: #94a3b8;
  --primario: #38bdf8;
  --primario-oscuro: #0ea5e9;
  --bordes: #334155;
  --sombra: 0 12px 32px rgba(15, 23, 42, 0.4);
  --radio: 18px;
  --transicion: 0.3s ease;
  --alerta-fondo: rgba(15, 23, 42, 0.85);
  --alerta-borde: rgba(56, 189, 248, 0.4);
  --alerta-texto: var(--texto);
  font-family: "Segoe UI", system-ui, sans-serif;
}

[data-tema="claro"] {
  color-scheme: light;
  --fondo: #f8fafc;
  --fondo-claro: #e2e8f0;
  --fondo-tarjeta: #ffffff;
  --texto: #0f172a;
  --texto-secundario: #475569;
  --primario: #2563eb;
  --primario-oscuro: #1d4ed8;
  --bordes: #cbd5f5;
  --sombra: 0 12px 32px rgba(15, 23, 42, 0.1);
  --alerta-fondo: rgba(255, 255, 255, 0.9);
  --alerta-borde: rgba(37, 99, 235, 0.2);
  --alerta-texto: var(--texto);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.08), transparent 55%), var(--fondo);
  color: var(--texto);
  line-height: 1.6;
  transition: background var(--transicion), color var(--transicion);
}

.encabezado {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2.5rem clamp(1rem, 5vw, 3rem);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.16), transparent 60%);
}

.titulo-pagina {
  flex: 1 1 320px;
  margin-bottom: 20px;
}

.titulo-pagina h1 {
  margin: 0 0 0.2rem;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.titulo-pagina p {
  margin: 0;
  color: var(--texto-secundario);
}

.contenedor {
  margin-top: 32px;
  padding: 0 clamp(1rem, 6vw, 4rem) 4rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 320px) minmax(340px, 1fr) minmax(260px, 360px);
  grid-template-areas: "configuracion pasos laplace";
  gap: 24px;
  align-items: start;
}

.tarjeta--configuracion {
  grid-area: configuracion;
}

.tarjeta--pasos {
  grid-area: pasos;
}

.tarjeta--laplace {
  grid-area: laplace;
}

.tarjeta {
  background: var(--fondo-tarjeta);
  border: 1px solid var(--bordes);
  border-radius: var(--radio);
  padding: 1.8rem;
  box-shadow: var(--sombra);
  transition: transform var(--transicion);
}

.tarjeta:hover {
  transform: translateY(-4px);
}

.tarjeta h2 {
  margin-top: 0;
  font-size: 1.3rem;
}

.configuracion {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
}

.configuracion label {
  font-weight: 600;
}

.configuracion input {
  width: 90px;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--bordes);
  background: var(--fondo-claro);
  color: var(--texto);
  transition: border-color var(--transicion), box-shadow var(--transicion);
}

.configuracion input:focus {
  outline: none;
  border-color: var(--primario);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
}

.matriz table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.matriz th,
.matriz td {
  padding: 0.4rem;
  text-align: center;
}

.matriz input {
  width: 100%;
  padding: 0.45rem;
  border-radius: 10px;
  border: 1px solid var(--bordes);
  background: var(--fondo-claro);
  color: var(--texto);
  font-family: "Fira Code", "Courier New", monospace;
  transition: border-color var(--transicion), transform var(--transicion);
}

.matriz input:focus {
  outline: none;
  border-color: var(--primario);
  transform: translateY(-1px);
}

.acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-start;
}

.boton {
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--fondo-claro);
  color: var(--texto);
  font-weight: 600;
  transition: transform var(--transicion), background var(--transicion), border-color var(--transicion);
}

.boton:hover {
  transform: translateY(-2px);
  border-color: var(--primario);
}

.boton:focus-visible {
  outline: 3px solid rgba(56, 189, 248, 0.4);
  outline-offset: 3px;
}

.boton.primario {
  background: linear-gradient(135deg, var(--primario), var(--primario-oscuro));
  color: #0f172a;
}

.boton.secundario {
  background: transparent;
  border-color: var(--bordes);
}

.boton--tema {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.25);
  color: var(--texto);
  cursor: pointer;
  transition: background var(--transicion), border-color var(--transicion), transform var(--transicion);
}

.boton--tema:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--primario);
  transform: translateY(-2px);
}

.boton--tema:focus-visible {
  outline: 3px solid rgba(56, 189, 248, 0.4);
  outline-offset: 3px;
}

.boton--tema .icono-tema {
  font-size: 1.45rem;
  line-height: 1;
}

[data-tema="claro"] .boton--tema {
  background: rgba(226, 232, 240, 0.85);
  border-color: rgba(148, 163, 184, 0.45);
  color: #0f172a;
}

[data-tema="claro"] .boton--tema:hover {
  background: rgba(37, 99, 235, 0.18);
  border-color: rgba(37, 99, 235, 0.45);
}

.pasos {
  display: grid;
  gap: 1.2rem;
}

.paso {
  padding: 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--bordes);
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  transition: transform var(--transicion), border-color var(--transicion);
}

[data-tema="claro"] .paso {
  background: rgba(241, 245, 249, 0.9);
}

.paso:hover {
  transform: translateY(-2px);
  border-color: var(--primario);
}

.paso__titulo {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.paso__descripcion {
  margin: 0 0 0.8rem;
  color: var(--texto-secundario);
}

.paso__matriz {
  font-family: "Fira Code", "Courier New", monospace;
  background: rgba(15, 23, 42, 0.3);
  padding: 0.8rem;
  border-radius: 12px;
  overflow-x: auto;
}

[data-tema="claro"] .paso__matriz {
  background: rgba(226, 232, 240, 0.8);
}

.paso__matriz table {
  border-collapse: collapse;
  width: 100%;
}

.paso__matriz td {
  padding: 0.2rem 0.6rem;
  text-align: right;
  min-width: 70px;
}

.paso__matriz td.resaltar {
  background: rgba(56, 189, 248, 0.2);
  border-radius: 6px;
}

.mensaje-resultado {
  font-weight: 600;
  color: var(--primario);
}

.laplace {
  display: grid;
  gap: 1rem;
}

.laplace details {
  border-radius: 14px;
  border: 1px solid var(--bordes);
  padding: 0.8rem 1rem;
  background: rgba(15, 23, 42, 0.3);
}

[data-tema="claro"] .laplace details {
  background: rgba(226, 232, 240, 0.8);
}

.laplace summary {
  cursor: pointer;
  font-weight: 600;
  outline: none;
}

.laplace__contenido {
  margin-top: 0.6rem;
  padding-left: 1.2rem;
  border-left: 2px solid rgba(148, 163, 184, 0.4);
  color: var(--texto-secundario);
}

.laplace-aviso {
  margin-top: 0;
  color: var(--texto-secundario);
}

.alertas {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 1rem 1.4rem;
  border-radius: 12px;
  background: var(--alerta-fondo);
  border: 1px solid var(--alerta-borde);
  color: var(--alerta-texto);
  min-width: 240px;
  box-shadow: var(--sombra);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transicion), transform var(--transicion);
  transform: translateY(12px);
}

.alertas.mostrar {
  opacity: 1;
  transform: translateY(0);
}

.pie {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  margin-bottom: 48px;
  margin-left: clamp(1rem, 6vw, 4rem);
  margin-right: auto;
}

.footer-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  color: var(--texto);
  text-decoration: none;
  font-size: 16px;
  gap: 12px;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--texto);
}

.footer-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primario);
  background: rgba(56, 189, 248, 0.18);
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.footer-icon {
  width: 14px;
  height: 14px;
}

.footer-text {
  font-weight: 600;
}

.footer-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  margin-left: 10px;
  transition: transform 0.2s ease;
}

.footer-link:hover .footer-img,
.footer-link:focus-visible .footer-img {
  transform: scale(1.05);
}

@media (max-width: 720px) {
  .encabezado {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .acciones {
    flex-direction: column;
  }
}

@media (max-width: 1200px) {
  .layout {
    grid-template-columns: minmax(280px, 1fr) minmax(340px, 1fr);
    grid-template-areas:
      "configuracion pasos"
      "laplace laplace";
  }
}

@media (max-width: 820px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "configuracion"
      "pasos"
      "laplace";
  }
}

@media (max-width: 600px) {
  .encabezado {
    padding: 1.8rem 1.25rem;
    gap: 1rem;
  }
  .titulo-pagina {
    margin-bottom: 12px;
  }
  .titulo-pagina h1 {
    font-size: 1.6rem;
  }
  .titulo-pagina p {
    font-size: 0.95rem;
  }
  .contenedor {
    margin-top: 24px;
    padding: 0 1.25rem 2.5rem;
  }
  .configuracion {
    flex-direction: column;
    align-items: stretch;
  }
  .configuracion input {
    width: 100%;
  }
  .acciones {
    flex-direction: column;
  }
  .boton {
    width: 100%;
    justify-content: center;
  }
  .matriz table {
    font-size: 0.95rem;
  }
  .footer-link {
    font-size: 15px;
  }
  .footer-info {
    gap: 4px;
  }
  .footer-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
  }
}