:root {
    --main-background: #0D1117;
    --secondary-background: #1E293B;
    --tertiary-background: #111827;
    --button-background: #3B82F6;

    --vibrant: #3B82F6;
    --card: #334155;

    --main-color-text: #F8FAFC;
    --secondary-color-text: #CBD5E1;

    --main-font-text: "Inter", sans-serif;
    --secondary-font-text: "JetBrains Mono", monospace;

}

/* accessibility  */

*:focus-visible {
    outline: 2px solid var(--vibrant);
    border-radius: 2%;
    text-decoration: underline !important;
    background-color: var(--main-background);
    outline-offset: 2px;
    border-radius: inherit;
}

/* html components */
::selection {
    background-color: var(--vibrant);
    color: var(--main-color-text);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-background);
}

::-webkit-scrollbar-thumb {
    background: var(--vibrant);
}



/* Main */
html {
    scroll-behavior: smooth;
}

body {
    background-color: black;
    margin: 0;
    padding: 0;
    color: var(--main-color-text);
    font-family: var(--secondary-font-text);
    overflow: hidden;
    overflow-y: auto;
}

body::-webkit-scrollbar {
    width: 0;
}

/* cover-presentation */
.cover-presentation {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    background-image: linear-gradient(0deg, var(--secondary-background), black);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--vibrant);
}

.cover-presentation h1 a {
    color: var(--main-color-text);
    font-size: 45px;
    text-decoration: none;
    text-align: center;
    transition: 1s;
}

.cover-presentation h1 a:hover {
    color: var(--vibrant);
    transition: 500ms;
}

.cover-presentation h2 {
    text-align: center;
}

.cover-presentation svg {
    align-self: center;
    position: absolute;
    bottom: 10%;
    fill: white;
    animation: Gotodown 1s ease-in-out alternate-reverse infinite;
    width: 50px;
    height: 50px;
}


@keyframes Gotodown {
    0% {
        fill: #ffffff36;
        bottom: 10%;

    }

    25% {
        fill: #ffffff36;

    }

    100% {
        fill: white;
        bottom: 7%;
    }
}

/* Main section */

.main-presentation {
    min-height: 100vh;
    overflow: visible;
    width: 100vw;
    position: relative;
    background-image: linear-gradient(var(--secondary-background), var(--tertiary-background));

    clip-path: ellipse(60% 100% at 0% 50%);
    box-shadow: inset -20px 0px 20px var(--vibrant);

}


.main-presentation h1 {
    padding: 15px;
    font-size: 50px;
    box-sizing: border-box;
    font-family: var(--main-font-text);
    width: fit-content;
    margin: 0;
    margin-bottom: 50px;
    padding: 10px 30px 10px 10px;
    background-color: #00000015;
}

.main-presentation p {
    padding: 15px;
    text-align: left;
    width: 50%;
    font-size: 23px;
    box-sizing: border-box;
    font-family: var(--secondary-font-text);
    margin: 0;
    margin-top: 10px;
    padding: 10px;
}




.main-presentation a {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    width: 40%;
    margin: 40px 0 0 15px;
    transform: translateY(-30px);
    padding: 0;
    height: 80px;
    border-radius: 5px;
    border: none;
    color: var(--main-color-text);
    font-family: var(--secondary-font-text);
    font-size: 30px;
    background-color: var(--button-background);
    transition: 400ms;
}