h1 {
  border: none;
}

.sinkan_title {
  height: unset;
  width: 100%;
}

.courses {
  display: flex;
  flex-wrap: wrap;
  gap: 2em;
  justify-content: center;
  padding: 1em;
}

.courses > div {
  width: 100%;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 1.2em 1.4em;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6em;
  border-top: 8px solid #ccc; /* 初期色、JSで上書き */
  transition: transform 0.2s;
}

@media screen and (min-width: 561px) {
  .courses > div {
    width: calc(50% - 1em);
  }
}

.courses > div:hover {
  transform: translateY(-4px);
}

.course_date {
  font-family: sans-serif;
  font-weight: bold;
  font-size: 1.1em;
  color: #555;
}

.course_title {
  font-size: 1.3em;
  font-family: "Kosugi Maru", sans-serif;
  font-weight: bold;
}

.course_description {
  font-size: 0.95em;
  font-family: sans-serif;
  color: #333;
}

.course_description span {
  display: block;
  margin-bottom: 0.4em;
  font-weight: bold;
  color: #444;
}