index.css

@import url("https://fonts.googleapis.com/css2?family=Poppins&family=Rubik&display=swap");

body {
  margin: 0;
  font-family: "Rubik", sans-serif;
  background: #111;
}
* {
  box-sizing: border-box;
}
h1,
h3 {
  font-weight: 100vh;
}
.brand{
    color: #fff;
}
.a-brand{
    text-decoration: none;
}
.weather-app {
  min-height: 100vh;
  background-image: url(./image/day/cloudy.jpg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  color: #fff;
  position: relative;
  transition: 500 ms;
  opacity: 1; /* change to 0 after finishing app*/
}
/* Add background overlay*/
.weather-app::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  z-index: 0;
}
.container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-direction: column;
  padding: 2em 3em 4em 3em;
}
.container > div {
  display: flex;
  justify-content: center;
  align-items: center;
}
.city-time,
.temp,
.weaather {
  margin: 0 1 em;
}
.city-time h3 {
  margin: 0;
  margin-bottom: 0.2em;
  font-size: 3em;
}
.temp {
  font-size: 7em;
  margin: 0;
}
.weather img {
  display: block;
  margin: 0.5em 0;
}
.panel {
  position: absolute;
  width: 40%;
  height: 100%;
  top: 0;
  right: 0;
  background: rgba(110, 110, 110, 0.2);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  z-index: 1;
  padding: 3em 2em;
  overflow-y: hidden;
}
.panel form {
  margin-bottom: 3em;
}
.submit {
  position: absolute;
  top: 0;
  right: 0;
  padding: 1.5em;
  margin: 0;
  border: none;
  outline: none;
  background: #fa6d1b;
  color: #fff;
  cursor: pointer;
  font-size: 1.2em;
  transition: 0.4s;
}
.submit:hover {
  background: #fff !important;
  color: #000;
}
.search {
  background: none;
  border: none;
  border-bottom: 1px #ccc solid;
  padding: 0 1em 0.5em 0;
  width: 80%;
  color: #fff;
  font-size: 1.1em;
}
.search:focus {
  outline: none;
}
.search::placeholder {
  color: #fff;
}
.panel ul,
.details {
  padding: 0 0 1em 0;
  margin: 2em 0;
  border-bottom: 1px solid #ccc;
}
.panel ul li,
.details li {
  color: #ccc;
  margin: 2.5em 0;
}
.panel ul h4,
.details h4 {
  margin: 3em 0;
}
.cities {
  max-height: 300px;
  overflow-y: scroll;
  margin: -2.5em 0px 0px 0px !important;
}
.city {
  display: block;
  cursor: pointer;
}
.city:hover {
  color: #fff;
}
.details li {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff url(image/loader.gif) no-repeat center center;
    background-size: 30%;
    overflow: hidden;
    z-index: 500;
    transition: opacity 0.75s, visibility 0.75s;
  }
  .loader--hidden {
    opacity: 0;
    visibility: hidden;
  }
  
/* Responsive website */
@media screen and (max-width: 800px) {
  .panel,
  .container {
    position: relative;
    width: 100%;
    top: initial;
  }
  .loader{
    background-size: 50%;
  }
}
@media screen and (max-width: 500px) {
  html {
    font-size: 12px;
  }
  .cities {
    max-height: 200px;
  }
  .loader{
    background-size: 80%;
  }
}
@media screen and (max-width: 350px) {
  .container {
    padding: 2em 1em 4em 1em;
  }
}
@media screen and (max-width: 300px) {
  .weather-app {
    min-height: 40em;
  }
}

::-webkit-scrollbar {
  width: 0px;
}