@import url('https://fonts.googleapis.com/css2?family=Anton&family=Bebas+Neue&family=Mitr:wght@200;300;400;500;600;700&family=Noto+Sans+Thai:wght@100..900&family=Oswald:wght@200..700&family=Prompt:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Sarabun:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Mitr", sans-serif;
}

body,
html {
    margin: 0;
    font-family: "Source Sans Pro", sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(#2b1055, #7597de);
}

#loadingSpinner {
    position: fixed;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s;
}

#loadingSpinner.hidden {
    opacity: 0;
    visibility: hidden;
}

.section {
    display: none;
}

.active {
    display: block;
}

.home {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    text-align: center;
    height: auto;
    width: auto;
}

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

.btn {
    align-items: center;
    text-align: center;
    display: flex;

}

@keyframes slide-down-center {
    0% {
        transform: translateX(-100%);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slide-in-center {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }

    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.home-h1 {
    animation: slide-down-center 0.9s ease-out forwards;
    background: linear-gradient(to right, orange, yellow);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 40px;
}

.home-h2 {
    animation: slide-in-center 0.5s ease-out forwards;
    color: white;
}

.home-h3 {
    animation: popup 2s ease-out forwards;
    color: white;
}

.btn {
    animation: popup 2s ease-out forwards;
}

@keyframes popup {
    0% {
        transform: translateY(100%);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.navbar {
    background: white;
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-radius: 0px 10px 10px;
}

.navbar-brand {
    background: linear-gradient(to left, blue, cyan);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 25px;
}

.navbar-brand:hover {
    color: blue;
    text-decoration: none;
}

.navbar-nav a {
    position: relative;
    background: linear-gradient(to left, cyan, blue);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 20px;
}

.navbar-nav a:hover {
    color: blue;
    transition: .3s;
}

.loader {
    scale: 3;
    height: 50px;
    width: 40px;
}

.box {
    position: relative;
    opacity: 0;
    left: 10px;
}

.side-left {
    position: absolute;
    background-color: #286cb5;
    width: 19px;
    height: 5px;
    transform: skew(0deg, -25deg);
    top: 14px;
    left: 10px;
}

.side-right {
    position: absolute;
    background-color: #2f85e0;
    width: 19px;
    height: 5px;
    transform: skew(0deg, 25deg);
    top: 14px;
    left: -9px;
}

.side-top {
    position: absolute;
    background-color: #5fa8f5;
    width: 20px;
    height: 20px;
    rotate: 45deg;
    transform: skew(-20deg, -20deg);
}

.box-1 {
    animation: from-left 4s infinite;
}

.box-2 {
    animation: from-right 4s infinite;
    animation-delay: 1s;
}

.box-3 {
    animation: from-left 4s infinite;
    animation-delay: 2s;
}

.box-4 {
    animation: from-right 4s infinite;
    animation-delay: 3s;
}

@keyframes from-left {
    0% {
        z-index: 20;
        opacity: 0;
        translate: -20px -6px;
    }

    20% {
        z-index: 10;
        opacity: 1;
        translate: 0px 0px;
    }

    40% {
        z-index: 9;
        translate: 0px 4px;
    }

    60% {
        z-index: 8;
        translate: 0px 8px;
    }

    80% {
        z-index: 7;
        opacity: 1;
        translate: 0px 12px;
    }

    100% {
        z-index: 5;
        translate: 0px 30px;
        opacity: 0;
    }
}

@keyframes from-right {
    0% {
        z-index: 20;
        opacity: 0;
        translate: 20px -6px;
    }

    20% {
        z-index: 10;
        opacity: 1;
        translate: 0px 0px;
    }

    40% {
        z-index: 9;
        translate: 0px 4px;
    }

    60% {
        z-index: 8;
        translate: 0px 8px;
    }

    80% {
        z-index: 7;
        opacity: 1;
        translate: 0px 12px;
    }

    100% {
        z-index: 5;
        translate: 0px 30px;
        opacity: 0;
    }
}