@media (max-width: 500px) {
  .strava {
    /* Strava埋め込み のレスポンシブ対応 */
    height: 0;
    overflow: hidden;
    padding-bottom: 260px; /*68.6%; 405/590x0.64 */
    position: relative;
    max-width: initial;
    margin-left: auto;
    margin-right: auto;
    overflow-x: hidden;
  }
  .strava iframe {
    transform: scale(0.64);
    transform-origin: 0 0;
    max-width: initial;
  }
}

/* mapbox */
.mapbox {
  width: 100%;
  height: 360px;
}

/* minimum width, maximum height */
.min-w1 {
  min-width: 1rem;
}
.min-w2 {
  min-width: 2rem;
}
.min-w3 {
  min-width: 4rem;
}
.min-w4 {
  min-width: 8rem;
}
.min-w5 {
  min-width: 16rem;
}
.mh1 {
  max-height: 1rem;
}
.mh2 {
  max-height: 2rem;
}
.mh3 {
  max-height: 4rem;
}
.mh4 {
  max-height: 8rem;
}
.mh5 {
  max-height: 16rem;
}