:root {
    --grid-unit: 1rem;
    --border-radius-base: 0.5rem;
  }
  
[data-theme="light"] {
    --color-bg: #ffffff;
    --color-fg: #402d41;
    --color-link: #207495;
    --box-shadow-color: rgba(64, 45, 65, 0.498);
    --scrollbar-color: #402d41;
}
  
[data-theme="dark"] {
    --color-bg: #000000;
    --color-fg: #ffffff;
    --color-link: #1793c4;
    --box-shadow-color: rgba(255, 255, 255, 0.498);
    --scrollbar-color: #000000;
}

::-webkit-scrollbar {
    width: 14px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-color);
    border-radius: 6px;
    border: 3px solid #f1f1f1;
}

/* ::-webkit-scrollbar-thumb:hover {
    background-color: #555;
} */

html {
    scrollbar-width: auto;
    scrollbar-color: var(--scrollbar-color) #f1f1f1;
}

body {
    background-color: var(--color-bg);
    color: var(--color-fg);
    font-size: 1em;
    display: flex;
    flex-direction: column;
    margin: 15px 0px;
    cursor: context-menu;
    -ms-overflow-style: -ms-autohiding-scrollbar;
}

.vn-header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin: auto;
    width: 90%;
    position: relative;
}

.vn-logo {
    width: 130px;
}

.vn-navbar ul {
    padding: 5px 20px;
    list-style-type: none;
    display: flex;
    flex-direction: row;
    gap: 20px;
    justify-content: center;
}

.vn-navbar ul li {
    display: flex;
    justify-content: center;
    position: relative;    
}

.vn-navbar ul li a {
    text-decoration: none;
    font-size: 1.2em;
    padding-bottom: 2px;
    color: var(--color-fg)
}

.vn-navbar ul li a:after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--color-fg);
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}

.vn-navbar ul li a:hover:after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.vn-navbar ul li a.active:after {
    transform: scaleX(1);
    transition: none;
}

.vn-theme-toggle-btn {
    background-color: var(--color-bg);
    border: none;
    padding: 0%;
    cursor: pointer;
}

.vn-theme-toggle-svg {
    height: 25px;
    transform: rotate(22deg);
    transition: transform 0.3s ease-in-out;
}

.vn-theme-toggle-svg:hover {
    transform: rotate(-5deg);
}

.vn-menu-btn {
    display: none;
}

#vn-menu-icon {
    display: none;
    cursor: pointer;
    position: relative;
}

#vn-navicon {
    background-color: var(--color-fg);
    width: 25px;
    height: 3px;
    display: block;
    position: relative;
    margin: 5px 0;
}

#vn-navicon::before,
#vn-navicon::after {
    content: '';
    background-color: var(--color-fg);
    width: 25px;
    height: 3px;
    display: block;
    position: absolute;
    left: 0;
    transition: transform 0.2s ease-out, top 0.2s ease-out;
}

#vn-navicon::before {
    top: -8px;
}

#vn-navicon::after {
    top: 8px;
}






.main {
    flex: 1;
    width: 75%;
    display: flex;
    flex-direction: column;
    margin: auto;
    margin-top: 30px;
}

.vn-main-section {
    margin-bottom: 5%;
    display: none;
}

.vn-main-section.active {
    display: block;
}

.vn-main-section p {
    text-align: justify;
    margin-bottom: 0;
}

.vn-section-heading {
    width: 60%;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    margin: auto;
    margin-bottom: 20px;
}

.vn-section-heading p {
    align-self: center;
    margin: 0px 20px;
    font-size: 1.1em;
}

.vn-dec-line {
    /* flex-grow: 1; */
    height: 1px;
    background-color: var(--color-fg);
    filter: invert(50%);
}

.vn-img-crop {
    width: 150px;
    height: 150px;
    position: relative;
    overflow: hidden;
    float: left;
    margin-right: .5em;
    margin-bottom: .4em;
    margin-top: 1.2em;
}

#about img {
    display: inline;
    margin: 0 auto;
    height: 100%;
    width: auto;
    object-fit: contain;
}

.vn-skills {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0em 2em;
    justify-content: center;
    align-content: center;
}

.vn-skill-item {
    border: 1px solid var(--color-fg);
    align-self: center;
    padding: .5em 1em;
    border-radius: 10px;
    white-space: nowrap;
}

.vn-skill-item:hover {
    border: 1px solid var(--color-fg);
    background-color: var(--color-bg);
    color: var(--color-fg);
    filter: alpha(opacity=40);
    filter: invert(85%);
}

.vn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 3fr));
    column-gap: 3em;
    row-gap: 2em;
    margin-top: 1em;
}

.vn-card {
    border-top: 1px solid;
    border-color: var(--color-fg);
    border-radius: 20px;
    box-shadow: .15em .2em var(--box-shadow-color);
    display: grid;
    gap: 1em;
    padding: 1em;
    width: 100%;
} 

.vn-card h4 {
    margin: 0;
    padding: 0;
    text-align: center;
    font-size: 1.2em;
}

.vn-card p:nth-child(2) {
    text-align: center;
}

.vn-card p {
    margin: 0;
    padding: 0;
}







.vn-education {
    text-align: center;
    margin-bottom: 30px;
}

.vn-education ul {
    list-style-type: none;
    padding: 0%;
}

.vn-education ul li {
    margin-bottom: 20px;
}








#research ol {
    padding: 0%;
}

#research ol li {
    margin-bottom: 20px;
    text-align: justify;
}

#research ol li a {
    text-decoration: none;
}

#research ol li a:hover {
    text-decoration: none;
    color: var(--color-link);
}


.vn-footer {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 95%;
    margin: auto;
    left: 0;
    bottom: 0;
}

.vn-social-media-links {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    width: inherit;
}

.vn-social-media-links ul {
    padding: 0%;
    list-style-type: none;
    display: flex;
    flex-direction: row;
    gap: 20px;
    margin: 5px 20px;
}

.vn-dec-line {
    flex-grow: 1;
    height: 1px;
    background-color: var(--color-fg);
    filter: invert(50%);
}

.vn-links-svg {
    width: 20px;
    filter: invert(50%);
}

.vn-footer-copyright p {
    margin: 0;
    font-size: .8em;
    filter: invert(30%);
}

@media screen and (max-width: 768px) {
    .main {
        margin-bottom: 30px;
    }
    .vn-header {
        width: 90%;
    }

    .vn-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 3fr));
        column-gap: 3em;
        row-gap: 2em;
        margin-top: 1em;
    }

    .vn-navbar {
        display: none;
        position: absolute;
        top: 10px;
        right: -20px;
        background-color: var(--color-bg);
        width: 200px;
        flex-direction: column;
        border-radius: 8px;
        z-index: 1;
        border: 1px solid var(--color-fg);
        padding-top: 15px;
    }

    .vn-navbar ul {
        flex-direction: column;
        gap: 10px;
    }

    #vn-menu-icon {
        display: block;
        z-index: 10;
    }

    #vn-menu-btn:checked ~ .vn-navbar {
        display: flex;
    }

    #vn-menu-btn:checked + #vn-menu-icon #vn-navicon {
        background: transparent;
    }

    #vn-menu-btn:checked + #vn-menu-icon #vn-navicon:before {
        transform: rotate(-45deg);
    }

    #vn-menu-btn:checked + #vn-menu-icon #vn-navicon:after {
        transform: rotate(45deg);
    }

    #vn-menu-btn:checked + #vn-menu-icon:not(.steps) #vn-navicon:before,
    #vn-menu-btn:checked + #vn-menu-icon:not(.steps) #vn-navicon:after {
        top: 0;
    }
}

@media screen and  (min-width: 1200px) {
    .vn-header {
        font-size: 1.2em;
    }

    .vn-logo {
        width: 160px;
    }

    .main {
        font-size: 1.2em;
    }

    .vn-links-svg {
        width: 25px;
    }
    .vn-footer-copyright p {
        font-size: 0.9em;
    }
}