.C_main {
  margin: 0;
  padding: 0;
  border: 0;
  box-sizing: border-box;
  color: inherit;
  scroll-behavior: smooth;
  border-spacing: 0;
  border-collapse: separate;
}

.C_main {
  background-color: white;
  display: flex;
  flex-flow: column nowrap;
  width: 100%;
  height: 100%;
}
.C_sub {
  width: 95%;
  height: 95%;
}

.C_button {
  width: fit-content;
}