liff/style.css

html{
    font-size: 11px;
}

body {
  background: -webkit-linear-gradient(200deg, #00C4FF, #9D1BB2);
  background: linear-gradient(205deg, #00C4FF, #9D1BB2);
  height: 100vh;
  margin: 0; 
  padding: 0;
}

.dark {
  background: #24252A;
}

.flex {
  min-height: 20vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#imag { 
    max-width: 25%; 
    height: auto; 
}

.button {
    background-color: #bababa; /* Green */
    border: none;
    color: white;
    padding: 8px 42px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-family: "Open Sans", sans-serif;
    font-size: 16px;
    margin: 1px 1px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}

.button6 {
    background-color: #212121;
    color: white;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #212121;
}

.button6:hover {
    background-color: transparent;
    color: black;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.button5 {
    background-color: #3f3f3f;
    color: black;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #3f3f3f;
}

.button5:hover {
    background-color: transparent;
    color: white;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.button4 {
    background-color: #555555;
    color: white;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #555555;
}

.button4:hover {
    background-color: transparent;
    color: black;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.button3 {
    background-color: #7c7c7c;
    color: black;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #7c7c7c;
}

.button3:hover {
    background-color: transparent;
    color: white;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.button2 {
    background-color: #a5a5a5;
    color: white;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #a5a5a5;
}

.button2:hover {
    background-color: transparent;
    color: black;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.button1 {
    background-color: #cccccc;
    color: black;
    width: 250px;
    border-radius: 6px;
    border: 2px solid #cccccc;
}

.button1:hover {
    background-color: transparent;
    color: white;
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

.responsive {
    max-width: 100%;
    height: auto;
}

.layang {
    position:fixed;
    right:5px;
    top:10px;
}

@import "https://fonts.googleapis.com/css?family=Open+Sans:300,400";
*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

a.bttn {
  color: white;
  text-decoration: none;
  -webkit-transition: 0.3s all ease;
  transition: 0.3s ease all;
}
a.bttn:hover {
  color: #2376fc;
}
a.bttn:focus {
  color: #2376fc;
}

.bttn {
  font-family: "Open Sans", sans-serif;
  font-size: 20px;
  letter-spacing: 3px;
  text-transform: uppercase;
  display: inline-block;
  text-align: center;
  width: 270px;
  font-weight: bold;
  padding: 5px 0px;
  border: 3px solid #1bf992;
  border-radius: 1px;
  position: relative;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.1);
}
.bttn:before {
  -webkit-transition: 0.5s all ease;
  transition: 0.5s all ease;
  position: absolute;
  top: 0;
  left: 50%;
  right: 50%;
  bottom: 0;
  opacity: 0;
  content: '';
  background-color: #1bf992;
  z-index: -2;
}
.bttn:hover:before {
  -webkit-transition: 0.5s all ease;
  transition: 0.5s all ease;
  left: 0;
  right: 0;
  opacity: 1;
}
.bttn:focus:before {
  transition: 0.5s all ease;
  left: 0;
  right: 0;
  opacity: 1;
}