body {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  background-color: #333333; /* チャコールグレー */
  color: #ffffff;
}

.profile-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
  box-sizing: border-box;
}

.profile-card {
  background-color: transparent; /* カードの背景は白 */
  color: #ffff; /* 文字色はチャコール */
  max-width: 800px;
  width: 100%;
  padding: 40px;
  border-radius: 12px;
  /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3); */
  box-sizing: border-box;
}

.profile-card h2 {
  margin-top: 0;
  font-size: 28px;
  border-bottom: 2px solid #ffff;
  padding-bottom: 10px;
}

.profile-card h3 {
  margin-top: 20px;
  font-size: 22px;
  color: #ffff;
}

.profile-card p {
  line-height: 1.8;
  margin-top: 10px;
  font-size: 16px;
}

section {
  margin-top: 30px;
}

@media screen and (max-width: 480px) {
  .profile-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
  }

  .profile-card {
    background-color: transparent; /* カードの背景は白 */
    color: #ffff; /* 文字色はチャコール */
    max-width: 800px;
    width: 100%;
    padding: 40px;
    border-radius: 12px;
    /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3); */
    box-sizing: border-box;
  }

  .profile-card h2 {
    margin-top: 0;
    font-size: 20px;
    border-bottom: 2px solid #ffff;
    padding-bottom: 10px;
  }

  .profile-card h3 {
    margin-top: 10px;
    font-size: 16px;
    color: #ffff;
  }

  .profile-card p {
    line-height: 1.8;
    margin-top: 10px;
    font-size: 14px;
  }

  section {
    margin-top: 30px;
  }
}

@media screen and (min-width: 480px) and (max-width: 767px) {
}

@media screen and (min-width: 768px) and (max-width: 1024px) {
}

@media screen and (min-width: 1025px) and (max-width: 1280px) {
}