body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: #0000;
    line-height: 1.5;
}

* {
    box-sizing:border-box;
}

.sidebar {
    left: 0;
    top: 0;
    bottom: 0;
    position: fixed;
    padding: 30px;
    height: 100vh;
    width: 250px;
    background: rgba(255, 255, 255, 0.8);
    overflow-x: hidden;
    overflow-y: auto;
    z-index: 999;
    transition: left .2s ease-out;
}

.nav-logo {
    width: 50px;
    height: 50px;
    margin-top: -0.7rem;
    background-image: url("../../img/favicon.ico");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.nav-title {
    color: black;
    text-decoration: none;
    font-weight: 900;
    font-size: larger;
}

.nav-article {
    color: gray;
}

.nav-item {
    padding: .7rem 0 .7rem 0;
    flex-direction: column;
    font-size: 11pt;
}

.nav-link {
    color: gray;
    text-decoration: none;
}

.nav a {
    transition-duration: .2s;
}

.nav a:visited {
    color: gray;
}

.nav .filter.checked{
    color: rgb(0, 85, 85);
}

@media (hover: hover) {
    .nav a:hover,a:active {
        color: rgb(0, 85, 85);
    }
}

.a-title-black a:visited {
    color: black;
}

@media (hover: hover) {
    .a-title-black a:hover,a:active {
        color: rgb(0, 85, 85);
    }
}

.wrapper {
    margin-left: 250px;
    width: -webkit-calc(100%-260px);
    width: -mos-calc(100%-260px);
    width: calc(100%-260px);
    padding: 10px;
}

.grid:after{
    content: '';
    display: block;
    clear: both;
}

.grid-sizer {
    width: 24.5%;
}

.grid-item {
    border-radius: .2rem;
    line-height: 0;
    margin-bottom: 10px;
    width: 24.5%;
    height: auto;
    float: left;
    overflow: hidden;
}

.grid-item img {
    width: 100%;
    height: auto;
    position: relative;
    padding: 0;
    margin: 0;
}

.grid-cover {
    font-weight:900;
    color: #000;
    text-decoration: none;
    width: 100%;
    height: 100%;
    display: block;
    background-color: rgba(255, 255, 255, 0.7);
    transition: opacity .2s ease-out;
    position: absolute;
    text-shadow: 0px 0px 8px #fff;
    opacity: 0;
    z-index: 1;
}

.grid-cover p{
    width: 100%;
    text-align: center;
    position: absolute;
    color: #000;
    left: 49%;
    bottom: 5%;
    transform: translateX(-50%);
}

@media (hover: hover) {
    .grid-cover:hover {
        opacity: 1;
    }
}

@media (hover: none) {
    .grid-cover {
        border-radius: 0.5rem;
        width: 90%;
        line-height: 0.5;
        font-size: 10.5pt;
        position: absolute;
        left: 49%;
        bottom: 10px;
        height: 40px;
        padding: 0;
        opacity: 1;
        transform: translateX(-50%);
    }
}

.container {
    /*background-color: aquamarine;*/
    display: flex;
    justify-content: center;    
    align-content: center;      
    flex-wrap: wrap;
    padding: 4rem 1rem;
    clear: both;
    margin-bottom: 2rem;
}

.aboutme-h {
    height: 500px;
}

.title {
    width: 100%;
    text-align: center;
    font-size: x-large;
    font-weight: bolder;
    padding-bottom: 1.5rem;
}

/* about me */

.avatar {
    float: left;
    width: 200px;
    height: 200px;
}

.ava-intro {
    color: gray;
    float: left;
    max-width: 1000px;
    margin-left: 3rem;
}

.skill-wrapper {
    float: left;
    width: 600px;
    margin: 1rem;
    text-align: center;
}

.skill-n {
    float: left;
    width: 100px;
    color: gray;
}

.skill-strip {
    background-color: rgba(0, 0, 0, 0.1);
    float: left;
    width: 480px;
    height: 5px;
    margin: 10px;
    border-radius: 2.5px;
}

.skill-strip-fill {
    background-color: rgba(0, 85, 85,0.7);
    height: 5px;
    border-radius: 2.5px;
}

.ability-wrapper {
    width: 400px;
    margin: 1rem 0.5rem;
}

.ability {
    color: gray;
    width: 100%;
    padding: 10px 0;
    margin-bottom: 1rem;
    text-align: center;
    font-size: large;
}

.ability-t {
    color: #000;
    border: 1px gray solid;
    border-radius: 2px;
    font-weight: bolder;
}

.ability p {
    color: #000;
    margin: 0;
    padding: 0;
    clear: both;
}

.ability img {
    height: 20px;
    margin-bottom: -2px;
    opacity: 0.8;
}

.ability p + p {
    color: gray;
    font-size: x-small;
}

.experience-wrapper {
    border: 1px gray solid;
    border-radius: 2px;
    float: left;
    width: 600px;
    margin: 1rem;
    text-align: center;
    padding: 2rem 1rem;
}

.experience-wrapper p {
    color: gray;
    clear: both;
    margin: 0;
    padding: 0;
}

.experience-wrapper .title {
    padding-bottom: 0;
}

.contact-wrapper {
    border-radius: 2px;
    width: 400px;
    margin: 1rem 0.5rem;
    background-color: gray;
    color: white;
    font-weight: bolder;
    padding: 10px 0;
    text-align: center;
    font-size: large;
}

.contact-wrapper a {
    color: white;
    text-decoration: none;
    transition-duration: .2s;
}

@media (hover: hover) {
    .contact-wrapper a:hover,a:focus,a:hover {
        color: rgb(220, 220, 220);
    }
}

.copyright {
    color: gray;
    font-size: small;
    margin-bottom: 2rem;
}

.copyright a {
    color: gray;
    text-decoration: none;
    transition-duration: .2s;
}

@media (hover: hover) {
    .copyright a:hover,a:focus,a:hover {
        color: rgb(220, 220, 220);
    }
}

/* collection */

.collection-con {
    padding-top: 1rem;
    padding-bottom: 1rem;
    margin-bottom: 0;
}

.collection-h {
    margin: 0;
    padding: 0;
    background-color: salmon;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.collection-img {
    margin: 0;
    padding: 0;
    background-color: salmon;
    width: 100%;
    max-width: 1400px;
    height: auto;
}

.collection-intro {
    width: 90%;
    max-width: 1200px;
    text-align: center;
    margin: 0 0 1rem 0;
}

.collection-sec {
    color: gray;
    text-align: center;
    width: 100%;
    margin: 0;
    font-size: smaller;
}

/* youtube */

.vdo {
    border: 0;
	width: 100%;
    max-width: 1400px;
	height: calc(56.25vw - 180px);
    max-height: 787px;
	top :0;
	left: 0;
	position: relative; 
    z-index: 1;
}

.vdoonly {
    height: calc(56.25vw - 170px);
}

.vdo43 {
    height: calc(75vw - 240px);
    max-height: 1050px;
}