* {
  font-family: "Futura Medium";
  margin: 0px;
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  background-color: #d9d9d9;
  flex-wrap: wrap;
}
/* Header */

header {
  display: flex;
  flex-direction: column;
  width: 60%;
  padding: 20px 10px;
}
/* category buttons */
.category {
  display: flex;
  flex-direction: row;
  margin-top: 50px;
  flex-wrap: wrap;
  width: auto;
  height: 150px;
  justify-content: space-around;
}
#abstract-btn,
#nature-btn,
#cosmo-btn,
#minimal-btn {
  width: 145px;
  height: 50px;
  color: white;
  font-size: 20px;
  cursor: pointer;
  border: none;
  border-radius: 15px;
}
#abstract-btn {
  background: url("../assets/imgs/abstract.jpg");
  background-size: 100%;
  background-position: 50%;
}

#nature-btn {
  background: url("../assets/imgs/nature.jpg");
  background-size: 100%;
  background-position: 50%;
}
#cosmo-btn {
  background: url("../assets/imgs/cosmo.jpg");
  background-size: 100%;
  background-position: 50%;
}
#minimal-btn {
  background: url("../assets/imgs/minimal.jpg");
  background-size: 100%;
  background-position: 50%;
}
/* random image from api */
.randomImage {
  width: 150px;
  height: auto;
  cursor: pointer;
  border-radius: 11px;
  margin-top: 35px;
}
.cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  margin-bottom: 80px;
}

button:hover {
  cursor: pointer;
}

/*---------- Nav Bar ---------- */
.navbar {
  width: 100%;
  display: flex;
  justify-content: center;
  background-color: #cecece;
  margin: 10px 0px;
}

.navbar-btns {
  display: none;
  width: 90px;
  height: 35px;
  border: none;
  background-color: #b9b9b9;
  border-radius: 13px;
  color: black;
  font-family: "Futura Bold";
  margin: 10px;
}

.navbar-btns:nth-child(1) {
  background-color: #b96a6a;
  color: white;
}

/*---------- footer ---------- */

footer {
  position: fixed;
  left: 0px;
  bottom: 0px;
  display: flex;
  background-color: #b96a6a;
  height: 60px;
  width: 100%;
  justify-content: space-evenly;
  align-items: center;
  border-radius: 22px 22px 0px 0px;
}

.footer-btns {
  height: 30px;
}

footer > button {
  background-color: transparent;
  border: 0;
}

/* --------------- 2-1 Tablet Size --------------- */

@media (min-width: 768px) and (max-width: 1023px) {
  header {
    width: 100%;
    align-items: center;
  }
  #logo {
    width: 260px;
  }
  .sub-title {
    font-size: 20px;
  }
  .category {
    justify-content: space-evenly;
    height: 80px;
  }

  .navbar-btns {
    display: inline-block;
  }
  .randomImage {
    width: 220px;
  }

  footer {
    display: none;
  }
}

/* --------------- 2-2 Desktop Size --------------- */

@media (min-width: 1023px) {
  header {
    width: 100%;
    align-items: center;
  }
  #logo {
    width: 20%;
  }
  .sub-title {
    font-size: 20px;
  }
  .category {
    justify-content: space-evenly;
    height: 80px;
  }
  #cosmo-btn,
  #abstract-btn,
  #nature-btn,
  #minimal-btn {
    width: 190px;
    height: 57px;
  }
  .navbar-btns {
    display: inline-block;
  }

  .randomImage {
    width: 320px;
  }

  footer {
    display: none;
  }
}