body {
  background-color: #f4f9ff;
  font-family: "Poppins", sans-serif;
  margin: 0;
  padding: 0;
}

.juego-drag-container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px;
  text-align: center;
}

.titulo-juego {
  font-size: 2rem;
  margin-bottom: 10px;
  color: #0d47a1;
}

.instrucciones {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: #555;
}

.tablero {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.columna {
  flex: 1;
  min-width: 300px;
  padding: 10px;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.08);
}

.fraccion-card {
  background-color: #e3f2fd;
  border: 2px dashed #2196f3;
  margin: 10px auto;
  padding: 14px;
  font-size: 1.4rem;
  color: #0d47a1;
  cursor: grab;
  border-radius: 8px;
  transition: background 0.3s ease;
}

.fraccion-card:active {
  cursor: grabbing;
  opacity: 0.7;
}

.fraccion-target {
  background-color: #f0f0f0;
  border: 2px solid #cfd8dc;
  margin: 16px auto;
  padding: 20px;
  font-size: 1.4rem;
  color: #37474f;
  min-height: 60px;
  border-radius: 8px;
  transition: background 0.3s ease;
}

.fraccion-target.hovered {
  background-color: #c5e1a5; /* verde suave */
  border-color: #558b2f;
}

.feedback {
  margin-top: 30px;
  font-size: 1.2rem;
  color: #2e7d32;
  font-weight: 500;
}

footer {
  text-align: center;
  padding: 20px 0;
  margin-top: 40px;
  background: #0d47a1;
  color: #fff;
  font-size: 0.9rem;
}

.cronometro,
.puntaje {
  font-weight: 600;
  margin: 10px 0;
  color: #0d47a1;
}

/* Botones de dificultad */
.botones-nivel {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.btn-nivel {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  background-color: #e3f2fd;
  color: #0d47a1;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-nivel:hover {
  background-color: #bbdefb;
}

.btn-nivel.seleccionado {
  background-color: #0d47a1;
  color: white;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

/* Contenedores alineados */
.tablero {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 20px;
}

.columna {
  flex: 1;
  min-width: 300px;
}

/* Tarjetas y objetivos */
.fraccion-card,
.fraccion-target {
  background-color: #f9f9f9;
  border: 2px dashed #90caf9;
  padding: 12px;
  margin: 12px auto;
  font-size: 1.4rem;
  text-align: center;
  border-radius: 10px;
  cursor: grab;
  transition: transform 0.2s, background-color 0.3s;
}

.fraccion-card:hover {
  background-color: #e3f2fd;
  transform: scale(1.05);
}

.fraccion-target.hovered {
  background-color: #c8e6c9;
  border-color: #2e7d32;
}

.fraccion-target.completo {
  background-color: #a5d6a7;
  border-style: solid;
  font-weight: bold;
}

/* Cronómetro y puntaje */
.cronometro,
.puntaje {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 10px 0;
  color: #1565c0;
}