body {
    font-family: Arial, "Noto Sans", "Noto Sans Thai", Tahoma;
    font-weight: 700;
    margin: 0;
    padding: 0;
    background-color: #f3efe9;
    animation: fade 2s;
}

body::selection {
    background-color: orange;
}

#normal_mark {
    background-color: greenyellow;
}

h1 {
    margin-top: 20px;
    font-size: 50px;
    text-align: left;
}

.rainbow_mark {
    user-select: none;
    background: linear-gradient(Red, Orange, Yellow, Green, Blue, Indigo, Violet);
    background-clip: text;
    color: transparent;
}

#line {
    margin-top: 3px;
    height: 3px;
    background-color: gray;
    width: 0;
    animation: draw_line forwards 3s;
}

@keyframes draw_line {
    to {
        width: 100%;
    }
}

h2 {
    margin-right: 100px;
    font-size: 30px;
}

h3 {
    text-align: center;
    font-size: 20px;
}

.try_itbtn {
    padding-top: 30px;
    margin-left: 100px;
}

.features {
    text-align: center;
}

.thai_alphanimation h2 {
    float: left;
    margin-left: 200px;
    margin-top: -50px;
    font-size: 200px;
    transform: rotate(45deg);
    animation: fade 2s linear;
}

.thai_alphanimation_right h2 {
    float: right;
    margin-right: 350px;
    margin-top: -520px;
    font-size: 200px;
    transform: rotate(-45deg);
    animation: fade 2s linear;
}

@media (max-width: 1500px) and (min-width: 1250px) {
    .thai_alphanimation_right h2 {
        margin-right: 100px;
    }
}

@media (max-width: 1249px) {
    .thai_alphanimation_right h2 {
        display: none;
    }   
}

.thai_alphanimation h2, .thai_alphanimation_right h2 {
    user-select: none;
    cursor: pointer;
}

@keyframes fade {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 100;
    }
}

button {
    user-select: none;
    font-size: 60px;
    border: 3px solid yellow;
    border-radius: 30px;
    cursor: pointer;
    background-color: rgb(23, 23, 49);
    transition: 0.5s;
    color: white;
}

button:hover {
    background-color: yellow;
    color: black;
    transition: 0.5s;
}

.instructions {
    text-align: center;
}

.contact {
    text-align: center;
    margin-top: 200px;
}

.mail-icon svg {
    width: 60px;
    height: 60px;
    margin-left: -100px;
}

a {
    text-decoration: none;
    color: black;
}