body {
  /* background-color: gray; */
  font-family: "Roboto", sans-serif;
  font-size: 16px;
  margin: 5%;
  padding: 10px;
  width: 95%;
  min-width: 1000px;
}

/* set the div direct son of body to be a flex container */
body > div {
  width: 90%;
}

.block {
  box-shadow: 0 0 10px #999;
}

/* first row */

#current-info-container {
  display: flex;
  justify-content: space-between;
}

#header-block,
#my-data-block {
  flex: 1;
  margin: 0 5px; /* Optional: adds some space between the blocks */
  height: 20rem;
}

#my-data-block {
  background-color: #f3fff3;
}

/* -------------------------------------------------------
    * 1st row
    * ------------------------------------------------------- */

#header-block {
  background-image: url("images/blue-sky.jpg");
  /* if the size is larger than img, let the img scale up to fit the size */
  background-size: cover;
  position: relative;
}

#current-weather {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  height: auto;
}

#header-block h2 {
  font-size: 3em;
  /* text-align: center; */
  margin-left: 30px;
  margin-top: 10px;
  text-align: left;
}

#uv-icon {
  height: 1em;
  width: 1em;
}

.weather-detail {
  display: flex;
  justify-content: space-around;
  width: 90%;
  flex-direction: row; /* 修改这里 */
  flex-wrap: wrap;
}

#humidity,
#rainfall,
#temperature,
#weather-icon {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  font-size: 2em;
}

#weather-icon img {
  width: 2.5em;
  height: 2.5em;
}

.number-info img {
  width: 1em;
  height: 1em;
}

.number-info {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
}

.info-value {
  font-size: 2em;
}

sup {
  position: relative;
  top: -0.25em;
  right: 0;
}

.info-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#uv-level {
  text-align: center;
  font-size: 2em;
}

#warning-container {
  position: absolute;
  bottom: 0;
  left: 0;
  background-color: #ef8c8a;
  height: fit-content;
  width: fit-content;
  padding-left: 10px;
  display: flex;
  /* justify-content: space-around; */
  flex-direction: column;
}

#toggle-warning {
  flex-grow: 1;
  background-color: #ef8c8a;
  font-size: 1em;
  /* no border */
  border: none;
  font-weight: bold;
}

#warning-message {
  margin-left: 10px;
  font-size: 10px;
  /* font color */
  color: black;
  /* display: none; */
  /* background-color: #ef8c8a; */
}

#last-update {
  position: absolute;
  bottom: 2px;
  right: 5px;
  font-size: 1em;
}

#my-data-block h2 {
  font-size: 3em;
  /* text-align: center; */
  margin-left: 30px;
  margin-top: 10px;
  margin-bottom: 0;
  text-align: left;
}

#current-location {
  margin-left: 30px;
  margin-top: 10px;
  margin-bottom: 20px;
  display: flex;
  justify-content: flex-start;
}

#my-aqhi,
#my-rainfall,
#my-temperature {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  font-size: 2em;
}

#my-weather {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  height: auto;
}

#my-aqhi-icon {
  width: 2em;
  height: 2em;
}

#aqhi-number {
  font-size: 1em;
}
#aqhi-quality {
  font-size: 0.5em;
}

/* -------------------------------------------------------
    * 2nd row
    * ------------------------------------------------------- */
/* second row */

#location-container {
  margin-top: 1rem;
  display: flex;
  justify-content: space-between;
}

.target-weather {
  justify-content: flex-start;
  display: flex;
  align-items: flex-start;
  height: 50%;
  flex-direction: column;
}

.select-num-info {
  font-size: 5em;
}

.block-target-location-block {
  flex: 1;
  /* margin: 0 20px; Optional: adds some space between the blocks */
  margin: 0 5px;
  height: 20rem;
  padding-left: 2%;
  box-shadow: 0 0 10px #999;
}

#target-location-block-1 {
  background-color: #f3ffff;
}
#target-location-block-2 {
  background-color: #fdf8e8;
}
#target-location-block-3 {
  background-color: #dfdfe1;
}

#selected-location-ahqi,
#selected-location-ahqi-level {
  font-size: 2rem;
}

#location-select-1,
#location-select-2 {
  /* width: 80%;
  height: 10%; */
  /* margin-left: 5%; */
  /* height: 100%; */
  background-color: #ddd9d6;
  font-size: 1em;
}

#location-select-3 {
  /* width: 60%;
  height: 10%; */
  background-color: #cecfd1;
  font-size: 1em;
}

.block-target-location-block h2 {
  font-size: 2em;
  /* text-align: center; */
  margin-left: 0px;
  margin-top: 10px;
  margin-bottom: 0;
}

/* -------------------------------------------------------
    * 3rd row
    * ------------------------------------------------------- */
/* third row */

#forecast-block h2 {
  font-size: 2em;
  /* text-align: center; */
  margin-left: 10px;
  margin-top: 10px;
  margin-bottom: 0;
}

#forecast-block {
  margin-top: 1rem;
  margin: 0 0 0 5px;
  background-color: #efeff9;
}

#forecast-day {
  display: flex;
  justify-content: space-around;
  /* box-shadow: 0 0 10px #999; */
}

.day-data-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 15rem;
  width: auto;
}

.nineday-weather-icon,
.nineday-weather-psr-icon {
  width: 4em;
  height: 4em;
}

@media (max-width: 500px) {
  body {
    /* background-color: gray; */
    font-family: "Roboto", sans-serif;
    margin: 10px;
    font-size: 8px;
    padding: 10px;
    width: 90%;
    min-width: 300px;
    justify-content: center;
    flex-direction: column;
    display: flex;
  }

  /* set the div direct son of body to be a flex container */
  body > div {
    width: 100%;
  }

  .block2-a {
    /* the a tag after h2 tag */
    font-size: 2em;
  }

  #current-location {
    font-size: 2em;
  }

  #current-info-container,
  #location-container {
    flex-direction: column;
  }

  #current-info-container {
    height: fit-content;
  }

  #header-block,
  #my-data-block {
    margin: 5px, 5px;
    height: 300px;
  }

  #current-weather {
    margin-bottom: 2em;
  }

  .number-info {
    width: auto;
  }

  .weather-detail:nth-of-type(2) {
    flex-direction: row;
  }

  /* make rainfall and uv-level occupy the same width in 2nd weather-detail */
  #rainfall,
  #uv-level {
    flex: 1 !important;
    width: auto;
    text-align: center;
    justify-content: center;
  }

  #warning-container, #last-update {
    font-size: 2em;
  }

  /* -------------------------------------------------------
    * 2nd row
    * ------------------------------------------------------- */
  .block-target-location-block {
    margin-top: 1em;
  }

  .select-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: fit-content;
    width: 60%;
    font-size: 5px;
    margin-bottom: 20px;
  }

  sup {
    position: relative;
    top: -0.5em;
    right: 0;
  }

  /* -------------------------------------------------------
    * 3rd row
    * ------------------------------------------------------- */

  #forecast-block {
    margin-top: 2em;
    padding-left: 10px;
    height: fit-content;
    padding-bottom: 10px;
    width: auto;
  }

  #forecast-day {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-left: 20rem;
  }

  .day-data-container {
    min-width: 80px;
    height: fit-content;
    padding-bottom: 10px;
  }
}