/* CSS custom variables */
:root {
  --building-one: #333333;
  --building-two: #190a05;
  --building-three: #001510;
  --building-three-highlight: #00223e;
  --building-four: #5d4157;
  --window-one: #fdb99b;
  --window-two: #ffa17f;
  --window-three: #cbad6d;
}

*,
*::before,
*::after {
  /* border: 1px solid black; */
  box-sizing: border-box;
}

body {
  height: 100vh;
  width: 100%;
  margin: 0;
  overflow: hidden;
}

/* styling container holding all back buildings */

.back-buildings {
  position: absolute;
  top: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-evenly;
  height: 100%;
  width: 100%;
}

/* applying shadow effect to give sunshine illusion */

.shadow {
  box-shadow: -10px -10px 12px -5px #ff9472;
}

.shadow-left {
  box-shadow: -10px 0 12px -5px #ff9472;
}

/* styling the first building */

/* centering building parts with flexbox */

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

.back-one {
  width: 10%;
  height: 75%;
}
.back-one-top {
  border-bottom: 7vw solid var(--building-one);
  border-left: 4vw solid transparent;
  border-right: 4vw solid transparent;
  border-bottom-left-radius: 35%;
  border-bottom-right-radius: 35%;
}

.back-one-mid {
  width: 70%;
  height: 10%;
  background: linear-gradient(var(--building-one), var(--building-four));
}
.back-one-second-mid {
  width: 85%;
  height: 10%;
  background: repeating-linear-gradient(
      var(--building-one),
      var(--building-one) 20%,
      transparent 20%,
      transparent 25%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-one) 10%,
      var(--window-one) 10%,
      var(--window-three) 15%
    );
}

.back-one-bottom {
  width: 100%;
  height: 90%;
  background: repeating-linear-gradient(
      var(--building-one),
      var(--building-one) 10%,
      transparent 10%,
      transparent 15%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-one) 10%,
      var(--window-one) 10%,
      var(--window-three) 15%
    );
}

/* styling the second building */
.back-two {
  width: 8%;
  height: 82%;
}

/* styling the layers of building two */

.back-two-lighting {
  width: 6%;
  height: 10%;
  background-color: var(--building-two);
}

.back-two-top {
  width: 62%;
  height: 10%;
  border-radius: 0.2rem 0.2rem 0 0;
  background: linear-gradient(var(--building-two), var(--building-one));
}

.back-two-middle {
  width: 70%;
  height: 10%;
  background: linear-gradient(var(--building-two), var(--building-one));
}

.back-two-second-mid {
  width: 80%;
  height: 10%;
  background: linear-gradient(var(--building-two), var(--building-one));
}

.back-two-bottom {
  width: 100%;
  height: 70%;
  background: linear-gradient(var(--building-one), var(--building-two));
}

/* styling the third building */

.back-three {
  width: 10%;
  height: 60%;
  border-top-left-radius: 30%;
  border-top-right-radius: 30%;
  background: repeating-linear-gradient(
    120deg,
    var(--building-three),
    var(--building-three) 10%,
    var(--building-three-highlight) 10%,
    var(--window-two) 13%
  );
}

/* styling the fourth building */

.back-four {
  width: 12%;
  height: 78%;
  background: repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-two) 10%,
      transparent 10%,
      transparent 15%
    ),
    repeating-linear-gradient(
      var(--building-one),
      var(--building-two) 2%,
      var(--window-three) 2%,
      var(--window-three) 5%
    );
}

/* styling the front buildings */

.front-buildings {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: space-evenly;
  overflow: hidden;
}

.front-one {
  width: 10%;
  height: 55%;
}

.front-one-top {
  border-top: 7vw solid transparent;
  border-left: 10vw solid var(--building-three);
  border-top-left-radius: 10%;
}

.front-one-bottom {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
      var(--building-three),
      var(--building-three) 10%,
      transparent 10%,
      transparent 85%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-three),
      var(--building-three) 10%,
      var(--window-two) 10%,
      var(--window-three) 15.5%
    );
}

.front-two {
  width: 7%;
  height: 42%;
  background: repeating-linear-gradient(
      90deg,
      var(--building-four),
      var(--building-four) 10%,
      transparent 10%,
      transparent 15%
    ),
    repeating-linear-gradient(
      var(--building-four),
      var(--building-four) 2%,
      var(--window-three) 2%,
      var(--window-three) 5%
    );
}

.front-three {
  width: 8%;
  height: 39%;
}

.front-three-top {
  border-bottom: 8vh solid var(--building-one);
  border-left: 2vw solid transparent;
  border-right: 2vw solid transparent;
}

.front-three-mid {
  width: 80%;
  height: 25%;
  background: repeating-linear-gradient(
      var(--building-one),
      var(--building-one) 10%,
      transparent 10%,
      transparent 15%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-one) 10%,
      var(--window-three) 10%,
      var(--window-three) 18%
    );
}

.front-three-bottom {
  width: 100%;
  height: 90%;
  background: repeating-linear-gradient(
      var(--building-one),
      var(--building-one) 10%,
      transparent 10%,
      transparent 95%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-one) 10%,
      var(--window-three) 10%,
      var(--window-three) 15%
    );
}

.front-four {
  width: 10%;
  height: 50%;
}

.front-four-lightning {
  width: 5%;
  height: 10%;
  background-color: var(--building-four);
}

.front-four-top {
  width: 70%;
  height: 10%;
  background: linear-gradient(var(--building-four), var(--building-one));
}

.front-four-mid {
  width: 80%;
  height: 10%;
  background: linear-gradient(var(--building-four), var(--building-one));
}

.front-four-bottom {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
      var(--building-four),
      var(--building-four) 10%,
      transparent 10%,
      transparent 95%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-four),
      var(--building-four) 10%,
      var(--window-three) 10%,
      var(--window-three) 15%
    );
}

.front-five {
  width: 10%;
  height: 48%;
  background: repeating-linear-gradient(
      var(--building-one),
      var(--building-one) 5%,
      transparent 5%,
      transparent 10%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-one),
      var(--building-one) 10%,
      var(--window-three) 10%,
      var(--window-three) 46%
    );
}

/* designing the sky view using radial gradient */
.sky-view {
  background-image: radial-gradient(
    at top left,
    #f9d423,
    #ff4e50,
    #1f1c18 80%,
    #000 100%
  );
}