html {
  box-sizing: border-box;
}

*,
*:after,
*:before {
  box-sizing: inherit;
}

body {
  min-height: 100vh;
  margin: 0;
  background-image: linear-gradient(
    180deg,
    hsla(50, 100%, 50%, 1) 0%,
    hsla(260, 53%, 55%, 1) 77%,
    hsla(208, 27%, 27%, 1) 100%
  );
  background-repeat: no-repeat;
  font-family: 'Jura', sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
/*
.hlavicka {
  height: 50px;
  left: 0;
  right: 0;
  top: 0;
  padding: 0 10px 0 10px;
}*/
.o-projektu {
  color: white;
  background-color: #ffd500;
  text-decoration: none;
  text-transform: uppercase;
  text-align: center;
  font-family: 'Jura', sans-serif;
  font-weight: 600;
  font-size: 12px;
  border: 2px solid white;
  border-radius: 50%;
  box-shadow: 2px 3px 5px rgba(0, 0, 0, 0.3);
  padding: 30px 0px;
  position: absolute;
  top: -40px;
  right: 0;
  bottom: 80px;
  width: 80px;
  height: 80px;
  z-index: 1;
}

.o-projektu:hover {
  background-image: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1));
}

main {
  position: relative;
  width: 320px;
  height: 70%;
  margin: 40px auto 0 auto;
  padding: 0 15px 10px 15px;
  background-color: white;
  border-radius: 20px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

h1 {
  font-family: 'Jockey One', sans-serif;
  color: #334759;
  text-shadow: 1px 1px 2px #7a7a7a;
  font-size: 30px;
  margin: 10px 0;
  padding-left: 20px;
}

h2 {
  font-family: 'Jockey One', sans-serif;
  color: #334759;
  text-shadow: 1px 1px 2px #7a7a7a;
  text-align: center;
  font-size: 18px;
  margin: 10px 0;
}

.div-obrazek {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.obrazek {
  width: 100%;
  border-radius: 20px;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 8px;
  text-align: right;
}

.obrazek-sona,
.obrazek-marta {
  width: 70%;
  border-radius: 50%;
}

.cerna {
  filter: grayscale(100%);
}

.uvodni-slovo {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.popisek {
  width: 100%;
  color: rgb(68, 66, 66);
  font-size: 14px;
  margin: 10px 0;
}

.github {
  width: 30px;
  height: 30px;
}

.tlacitka {
  display: flex;
  justify-content: center;
}

.marta,
.sona {
  background-color: #ffd500;
  align-items: center;
  color: white;
  text-decoration: none;
  text-transform: uppercase;
  font-weight: 600;
  font-size: 14px;
  border-radius: 0 20px 20px 0;
}

.marta {
  border-radius: 20px 0 0 20px;
  border-right: 2px solid white;
  box-shadow: 2px 7px 8px -7px rgba(0, 0, 0, 0.5);
  padding: 5px 25px;
}
.sona {
  padding: 5px 30px;
  box-shadow: 3px 7px 8px -7px rgba(0, 0, 0, 0.5);
}

.sona2,
.marta2 {
  border-radius: 20px;
  border: 0;
  box-shadow: 2px 3px 5px rgba(0, 0, 0, 0.3);
}

.marta:hover,
.sona:hover {
  background-image: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1));
}

.paticka {
  height: 40px;
  width: 100vw;
  text-align: center;
  font-size: 10px;
  padding: 10px;
  color: rgba(255, 255, 255, 0.5);
}
.paticka a {
  color: rgba(255, 255, 255, 0.5);
}

.logo {
  position: absolute;
  bottom: -10px;
  left: 0px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid white;
  background-color: hsla(208, 27%, 27%, 1);
}

@media screen and (min-width: 540px) {
  .container {
    display: flex;
    align-items: center;
  }
  .o-projektu {
    font-weight: 700;
    font-size: 18px;
    padding: 50px 0px;
    position: absolute;
    top: -60px;
    right: -50px;
    bottom: 80px;
    width: 120px;
    height: 120px;
    z-index: 1;
  }
  h1 {
    font-size: 48px;
    margin: 20px 0 20px 0;
    text-align: center;
  }
  h2 {
    font-size: 24px;
    margin: 16px 0;
  }
  main {
    width: 540px;
    height: 100%;
    margin-top: 80px;
    padding: 10px 20px 20px 20px;
  }
  .div-obrazek {
    width: 50%;
    margin-left: 15px;
  }
  figcaption {
    font-size: 10px;
  }
  .uvodni-slovo {
    width: 50%;
    margin-left: 15px;
  }
  .popisek {
    margin: 15px 15px;
    font-size: 16px;
  }
  /*.hlavicka {
    height: 80px;
    padding: 0 30px 0 50px;
  }*/
  .marta {
    padding: 15px 77px;
    font-weight: 700;
    font-size: 18px;
  }
  .sona {
    padding: 15px 80px;
    font-weight: 700;
    font-size: 18px;
  }
  .logo {
    bottom: -30px;
    left: -30px;
    width: 70px;
    height: 70px;
  }

  .paticka {
    height: 80px;
    font-size: 14px;
    padding: 20px;
  }
}
@media screen and (min-width: 1024px) {
  main {
    width: 900px;
  }
  .popisek {
    font-size: 18px;
  }
}