.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)) {
  max-width: 1200px;
  margin-left: auto !important;
  margin-right: auto !important;
}

.thin-line {
  height: 1px;
  background-color: #dfdede; /* thin black line */
  width: 100%; /* or specific width */
    margin-bottom: 30px;
  margin-top: 30px;
}

hr {
  border: none;
  height: 1px;

  background-color: #dfdede; /* oder deine Farbe */
  margin: 0; /* optional */
}