/* Stylesheet für Landingpage Animation */

/* Inhaltsverzeichnis */

/* 1.0 logo im header
   2.0 main
    2.1 navigation
    2.2 striche
   3.0 Blätter
    3.1 blätter animieren
    3.2 animation für blätter
    4.0 media queries

    */

/* === Small CSS Reset === */
* {
  margin: 0;
  padding: 0;
}
*,
*::after,
*::before {
  box-sizing: border-box;
}
body {
  font-family: "roboto", Arial;
  background: var(--braun);
}

/* 1.0 logo im header */

header {
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  flex-direction: column;
  -webkit-box-align: center;
  align-items: center;
}
header img {
  margin-top: 4rem;
  z-index: 998;
}
header h1 {
  color: rgb(201, 242, 148);
  font-size: 2em;
  padding: 2rem 0;
}

/* 2.0 main */
main {
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  flex-direction: column;
  -webkit-box-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  align-items: center;
  height: 50vh;
  background: var(--braun);
  z-index: 9999;
  position: relative;
}

/* 2.1 navigation */
main klein_nav {
  position: absolute;
  left: 50%;
}
main a {
  position: relative;
  display: inline-block;
  padding: 2rem 3rem;
  color: var(--orange);
  text-decoration: none;
  font-size: 2rem;
  -webkit-transition: 1s;
  -webkit-transition: 1s;
  -webkit-transition: 1s;
  transition: 1s;
}
a:hover {
  background-image: url(../bilder/blatt_grün.svg);
  background-repeat: no-repeat;
  background-position: center;
  font-size: 0.8em;
  color: var(--braun);
}
/* 2.1 striche */

main .strich_links,
main .strich_rechts {
  width: 100%;
  height: 1rem;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(50%, transparent), to(var(--orange)));
  background: linear-gradient(180deg, transparent 50%, var(--orange));
}
main .strich_rechts {
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
}
/* 3.0 fallende blätter */

.b_container {
  width: 100%;
  height: 90%;
  background: var(--braun);
  display: block;
  overflow: hidden;
}
.b_container .blaetter {
  height: 100%;
  width: 100%;
  overflow: hidden;
}
.blaetter div {
  position: absolute;
}
.blaetter div img {
  opacity: 0.5;
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
}

/* 3.1 blätter animieren */

.blaetter div:nth-child(1) {
  left: 20%;
  -webkit-animation: animate 15s linear infinite;
  animation: animate 15s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(2) {
  left: 10%;
  -webkit-animation: animate 20s linear infinite;
  animation: animate 20s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(3) {
  left: 30%;
  -webkit-animation: animate 25s linear infinite;
  animation: animate 25s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(4) {
  left: 0;
  -webkit-animation: animate 13s linear infinite;
  animation: animate 13s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(5) {
  left: 80%;
  -webkit-animation: animate 28s linear infinite;
  animation: animate 28s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(6) {
  left: 35%;
  -webkit-animation: animate 30s linear infinite;
  animation: animate 30s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(7) {
  left: 85%;
  -webkit-animation: animate 32s linear infinite;
  animation: animate 32s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}
.blaetter div:nth-child(8) {
  left: 60%;
  -webkit-animation: animate 12s linear infinite;
  animation: animate 12s linear infinite;
  -webkit-animation-delay: -5s;
  animation-delay: -5s;
}

/* 3.3 animation für blätter */

@-webkit-keyframes animate {
  0% {
    opacity: 0;
    top: -10;
    -webkit-transform: translateX(-2rem) rotate(45deg);
    transform: translateX(-2rem) rotate(45deg);
  }
}

@keyframes animate {
  0% {
    opacity: 0;
    top: -10%;
    -webkit-transform: translateX(-2rem) rotate(0deg);
    transform: translateX(-2rem) rotate(0deg);
  }
  5% {
    opacity: 0.3;
    top: -8%;
  }
  10% {
    opacity: 1;
    top: -5%;
  }
  20% {
    -webkit-transform: translateX(-2rem) rotate(45deg);
    transform: translateX(-2rem) rotate(45deg);
  }
  40% {
    -webkit-transform: translateX(-2rem) rotate(90deg);
    transform: translateX(-2rem) rotate(90deg);
  }
  60% {
    -webkit-transform: translateX(-2rem) rotate(165deg);
    transform: translateX(-2rem) rotate(165deg);
  }
  80% {
    -webkit-transform: translateX(-2rem) rotate(180deg);
    transform: translateX(-2rem) rotate(180deg);
  }
  100% {
    top: 110%;
    -webkit-transform: translateX(-2rem) rotate(225deg);
    transform: translateX(-2rem) rotate(225deg);
  }
}

/* 4.0 media queries */

@media all and (max-width: 600px) {
  main {
    width: 100vw;
  }
  main a {
    padding: 1rem 0;
    font-size: 1rem;
  }
  main .klein_nav {
    display: -webkit-box;
    width: 100vw;
    display: flex;
    -webkit-box-pack: justify;
    justify-content: space-around;
    left: 0;
  }
  main a:hover {
    font-size: 0.5rem;
  }
}