html {
    scroll-behavior: smooth;
    font-size: 18px;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    background-color: rgb(50, 50, 50);
    margin: 0rem;
    font-family: 'Roboto Mono', sans-serif;
    max-width: 100%;
    overflow-x: hidden;
    padding-top: 2.45rem;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    height: 3em;
    background-color: rgba(50, 50, 50, 0.85);
    padding: 0.5rem 1.7rem;
}

hr {
    background-color:rgb(125, 125, 125);
    height: 1px;
    border: none;
}

h1 {
    font-size: 3.25rem;
}

h2 {
    font-size: 1.75rem;
}

p {
    font-size: 1rem;
    color: rgb(125, 125, 125);
    margin-bottom: 4em;
}

a {
    color: #E2B714;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: #E2B714;
}

ul {
    list-style-type: none;
}

.logo {
    width: 50px;
    border: 2px solid rgb(75, 75, 75);
    border-radius: 42px;
    margin-top: -0.25rem;
}

.logo:hover {
    filter: sepia(40%) saturate(300%) brightness(100%) contrast(69%);
    border: 2px solid #E2B714;
}

svg {
    fill: #E2B714;
    stroke: #E2B714;
    width: 2rem;
    height: 2.5rem;
    cursor: pointer; 
}

.close {
    float: right;
    margin: 1em;
}

.open_nav {
    transform: translateX(0%);
}

nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 50%;
    background-color: rgb(75, 75, 75);
    opacity: 95%;
    z-index: 1;
    transform: translateX(100%);
    transition: transform .42s ease-in-out;
}

.directs {
    margin-top: 6.9em;
}

li {
    margin-bottom: 1.5em;
}

.direct {
    text-decoration: none;
    font-size: 1.4rem;
    color: #E2B714;
}

.about_wrapper {
    min-height: 80vh;
}

section {
    scroll-margin-top: 6.5em;
}

section.about {
    margin: 2em;
    position: relative; 
    animation: intro 1s ease-in-out both;
}

.intro {
    color: #E2B714;
    font-size: 1.41rem;
}

.name {
    margin-top: -1.25em;
    margin-bottom: -0.25em;
    color: rgb(200, 200, 200);
}

.desc {
    color: rgb(125, 125, 125);
}

.bio {
    margin-bottom: 2.5em;
}

.contacts {
    margin-top: 2.5em;
    margin-left: -2.25em;
    margin-bottom: 5em;
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    gap: 0em;
}

.contact_contents {
    display: flex;
    flex-direction: row;
    justify-content: center;
    max-width: 20em;
    width: 10em;
    max-height: 3em;
    gap: 0.5em;
    border: thin solid #E2B714;
    cursor: pointer;
}

.contact_contents:hover {
    background-color: #E2B714;
}

.contact_icon {
    color: #E2B714;
    fill: #E2B714;
    stroke: none;
    width: 1.5rem; 
    margin-top: 0.25em;
}

.contact_contents:hover > .contact_icon {
    color: white;
    fill: white;
    stroke: none;
    width: 1.5rem; 
    margin-top: 0.25em;
}

.contact_title {
    font-size: 1.1rem;
    margin-top: 0.66em;
    color: #E2B714;
}

.contact_contents:hover > .contact_title {
    text-decoration: none;
    color: white;
}

.contact_box:hover {
    text-decoration: none;
}

.contact_contents_email {
    display: flex;
    flex-direction: row;
    justify-content: center;
    max-width: 30em;
    width: 20em;
    max-height: 3em;
    gap: 0.5em;
    border: thin solid #E2B714;
    cursor: pointer;
}

.contact_contents_email:hover {
    background-color: #E2B714;
}

.contact_contents:hover > .contact_title {
    text-decoration: none;
    color: white;
}

.contact_contents_email:hover > .contact_icon {
    color: white;
    fill: white;
    stroke: none;
    width: 1.5rem; 
    margin-top: 0.25em;
}

.contact_contents_email:hover > .contact_title {
    text-decoration: none;
    color: white;
}

.contact_contents_linkedin {
    display: flex;
    flex-direction: row;
    justify-content: center;
    max-width: 15em;
    width: 11.3em;
    max-height: 3em;
    gap: 0.5em;
    border: thin solid #E2B714;
    cursor: pointer;
}

.contact_contents_linkedin:hover {
    background-color: #E2B714;
}

.contact_contents:hover > .contact_title {
    text-decoration: none;
    color: white;
}

.contact_contents_linkedin:hover > .contact_icon {
    color: white;
    fill: white;
    stroke: none;
    width: 1.5rem; 
    margin-top: 0.25em;
}

.contact_contents_linkedin:hover > .contact_title {
    text-decoration: none;
    color: white;
}

.down_arrow {
    margin-left: -2.42em;
    cursor: default;
    position: absolute;
    bottom: 8em;
    right: -2.42em;
    width: 1em;
    height: 10rem;
    animation: moveArrow 1.2s alternate infinite;
}

section.experiences {
    margin: 2em;
    margin-top: 6.7em;
}

.experience_list {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.experience_list .experience {
    position: relative;
    padding-left: 1.6em;
    margin-bottom: 3em;
}

.experience_list .experience::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.75em;
    width: 0.55em;
    height: 0.55em;
    border: 2px solid rgb(180, 180, 180);
    border-radius: 50%;
    background: transparent;
}

.experiences h2 { 
    margin-top: 0em; 
}

.experiences p {
    margin-bottom: 1.2em;
}

.experience_title {
    color: rgb(180, 180, 180);   
    font-size: 1.12rem;           
    font-weight: 700;
}

.experience_subtitle {
    color: rgb(125, 125, 125); 
    font-size: 1rem;
    margin-top: -0.8em;         
    margin-bottom: 0.5em;        
}

.experience {
    margin-bottom: 3em;
}

.experience p {
    margin-bottom: 0em;
}

section.coursework {
    margin: 2em;
}

.coursework_list {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.coursework_list .course {
    position: relative;
    padding-left: 1.6em;
    margin-bottom: 3em;
}

.coursework_list .course::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.75em;
    width: 0.55em;
    height: 0.55em;
    border: 2px solid rgb(180, 180, 180);
    border-radius: 50%;
    background: transparent;
}

.course {
    margin-bottom: 3em;
}

.coursework h2 { margin-top: 0em; }

.coursework p {
    margin-top: 0em;
    margin-bottom: 1.2em;
}

.course_title {
    color: rgb(180, 180, 180);   
    font-size: 1.12rem;           
    font-weight: 700;
}

.section_title {
    color: #E2B714;
    font-size: 2rem;
}

.separator {
    display: flex;
    align-items: center;
    text-align: left;
    margin-bottom: 1em;
}

.separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid #E2B714;
}

.separator:not(:empty)::after {
    margin-left: 1em;
    margin-right: 1em;
}

section.projects > div.projects {
    display: grid;
    grid-template-columns: repeat(2, minmax(350px, 1fr));
}

section.projects > .projects > .separator {
    grid-column: 1 / -1;
}

.main_proj {
    margin: 1.41em
}

.bike_proj {
    grid-column: 1 / -1;
    margin: 1.41em;
}

.proj_pic {
    width: 100%;
    height: 16em;
    object-fit: cover;
    border: 3px solid rgb(150, 150, 150);
    box-sizing: border-box;
}

.proj_pic:hover {
    filter: sepia(40%) saturate(300%) brightness(100%) contrast(69%);
    border: 3px solid #E2B714;
}

.proj_info {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
}

.first_line {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.2em;
}

.proj_name {
    color: rgb(180, 180, 180);
    font-size: 1.12rem;
    display: block;
    margin-bottom: 0em;
}

.proj_name:hover {
    color: #E2B714;
    text-decoration: none;
}

.link {
    margin-top: 0.25em;
    stroke: rgb(180, 180, 180);
}

.link:hover {
    stroke: #E2B714;
}

.tech_stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.41em;
    margin-left: 0;
    padding-left: 0;
    margin-top: -0.67em;
    margin-bottom: -1.42em;
}

.tech {
    font-size: 0.75rem;
    color: rgb(170, 170, 170);
    background: rgb(75, 75, 75);
    border: 1px solid rgb(75, 75, 75);
    border-radius: 25px;
    padding: 0.25em 1em;
    flex: 0 0 auto;
}

footer {
    margin-top: 7.5em;
}

.end_contact {
    color: rgb(120, 120, 120);
    fill: rgb(120, 120, 120);
    stroke: none;
    width: 2rem;
}

.end_contact:hover {
    fill: #E2B714;
}

.end_contacts {
    margin-left: -2em;
    margin-bottom: -2em;
    display: flex;
    flex-direction: row;
    gap: 1em;
}

.copyright {
    font-size: 0.75rem;
}

.copyright_symbol {
    font-size: 1.1rem;
}

@media only screen and (max-height: 500px) {
    .about_wrapper {
        height: unset;
    }
}

@media only screen and (min-height: 950px) {
    section.about {
        height: 850px;
    }

    .about_wrapper {
        display: flex;
        justify-content: center;
        align-items: center;
    }
}

@media (max-width: 1098px) {
    body {
        width: 90%;
        margin-top: 3rem;
        margin: 3rem auto;
    }

    section.projects > div.projects {
        display: block;
        column-gap: 0;
    }

    .tech_stack {
        display: flex;
        gap: 0.25rem;
        margin-top: 0;
        margin-bottom: 0;
    }

    .tech {
        font-size: 0.75rem;
        padding: 0.15rem 0.7rem;
        align-self: flex-start;
        margin-top: -1em;
    }

    nav {
        background-color: rgba(50, 50, 50, 100);
        padding-right: 1.5rem;
    }

    .directs li {
        margin-left: 0.25rem;
    }

    .contact_contents_email {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding-left: 1rem;
        padding-right: 1rem;
        max-height: 3em;
    }

    .link {
        margin-top: 0.25em;
        stroke: rgb(180, 180, 180);
        margin-right: -0.5rem;
    }
}

@media only screen and (min-width: 1099px) {
    body {
        width: 1100px;
        margin: 1em auto;
        margin-top: 4rem;
    }

    .menu {
        display: none;
    }

    nav {
        position: static;
        transform: none;
        display: flex;
        width: auto;
        height: auto;
        background: none;
    }

    header {
        position: fixed;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 1050px;
        z-index: 10;
        background-color: rgba(50, 50, 50, 0.85);
        padding-top: 1rem;
    }

    .directs {
        display: flex;
        gap: 4em;
        margin: 0em;
    }

    .close {
        display: none;
    }

    .contacts {
        flex-direction: row;
        gap: 1em;
    }

    .proj_info {
        width: auto; 
    }
      
    .proj_pic {
        width: 38%;
        height: 241px;
        object-fit: cover;
        float: right;
        margin-left: 2rem;
    }
}

#nav_toggle:checked ~ header nav {
    transform: translateX(0%);
}

@keyframes intro {
    from {
        opacity: 0;
        transform: translateY(-200px)
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}