@font-face {
    font-family: 'PPAgrandir-Variable';
    src: url('https://gjzhou.webdev.iyaserver.com/acad280/PPAgrandir-Variable.ttf') format('truetype');
}

body {

    margin: 0px;
    overflow: hidden;

    font-family: 'PPAgrandir-Variable', sans-serif;
}

h1 {
    font-family: 'PPAgrandir-Variable', sans-serif;
    font-size: 100px;

}

h2 {
    font-family: 'PPAgrandir-Variable', sans-serif;
    font-size: 50px;

}


/* Define a class for the glowing effect */
.glow {
    box-shadow: 0 0 10px #fff;
    /* White glow effect */
    filter: drop-shadow(0 0 10px #fff);
    /* Alternative glow effect */
}

/* Add a class for circles representing runs with friends */
.circle-friend {
    border: 2px dotted #fff;
    /* Dotted border with white color */
}


.landing-page {
    position: absolute;
    color: white;
    font-weight: 300;
    
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10001;
    width: 100%;
    height: 100%;
}

#graph {
    position: relative;
    z-index: 10000;
}

.hidden {
    display: none;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Linear gradient from top to bottom */
    background: linear-gradient(to bottom, #0000a4, #7b7b7b);
    /* For older browsers */
    background: -webkit-linear-gradient(top, #0000a4, #7b7b7b);
    /* Gradient fallback for non-supporting browsers */
    /* You can add solid color as fallback */
    background-color: #0000a4;
    /* Fallback color */
    z-index: 9998;
    /* Ensure it's above other elements */
}

.btn-21,
.btn-21 *,
.btn-21 :after,
.btn-21 :before,
.btn-21:after,
.btn-21:before {
    border: 0 solid;
    box-sizing: border-box;
}

.btn-21 {
    -webkit-tap-highlight-color: transparent;
    -webkit-appearance: button;
    background-color: #000;
    background-image: none;
    color: #fff;
    cursor: pointer;
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif,
        Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
    font-size: 30%;
    font-weight: 900;
    line-height: 1.5;
    margin: 0;
    -webkit-mask-image: -webkit-radial-gradient(#000, #fff);
    padding: 0;
    text-transform: uppercase;
}

.btn-21:disabled {
    cursor: default;
}

.btn-21:-moz-focusring {
    outline: auto;
}

.btn-21 svg {
    display: block;
    vertical-align: middle;
}

.btn-21 [hidden] {
    display: none;
}

.btn-21 {
    border-radius: 99rem;
    border-width: 2px;
    overflow: hidden;
    padding: 0.8rem 3rem;
    position: relative;
}

.btn-21 span {
    mix-blend-mode: difference;
}

.btn-21:before {
    -webkit-animation: move-out 0.3s;
    animation: move-out 0.3s;
    background: #fff;
    content: "";
    height: 100%;
    left: -100%;
    position: absolute;
    top: 0;
    width: 100%;
    will-change: transform;
}

.btn-21:hover:before {
    -webkit-animation: move-in 0.3s forwards;
    animation: move-in 0.3s forwards;
}

@-webkit-keyframes move-in {
    0% {
        transform: translateX(0);
    }

    to {
        transform: translateX(100%);
    }
}

@keyframes move-in {
    0% {
        transform: translateX(0);
    }

    to {
        transform: translateX(100%);
    }
}

@-webkit-keyframes move-out {
    0% {
        transform: translateX(100%);
    }

    to {
        transform: translateX(200%);
    }
}

@keyframes move-out {
    0% {
        transform: translateX(100%);
    }

    to {
        transform: translateX(200%);
    }
}