body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    scroll-behavior: smooth;
}

#nav {
    background-color: #2a2a2a;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    padding: 10px;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1;
    transition: top 0.3s ease-in-out;
}

.logo a {
    color: rgb(191, 191, 191);
    text-decoration: none;
    font-size: 1.5em;
    transition: color 0.3s ease;
}

.logo a:hover {
    color: white;
}


.logo .fa-seedling {
    margin-right: 8px;
    color: #5e8266;
}

.logo .fa-seedling:hover {
    color:#449c59;
}


.links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.links li {
    padding: 0 10px;
    position: relative;
}

.links a {
    color: rgb(191, 191, 191);
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
    z-index: 1;
}

.links a:hover {
    color: white;
}

.links li::after {
    content: '';
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.4s;
    position: absolute;
    bottom: -13px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 0;
}

.links li:hover::after {
    width: 100%;
}


.masthead {
    display: flex;
    flex-direction: column;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("../pic/bocchi-min.jpg") no-repeat center center fixed;
    background-size: cover;
    color: white;
    padding: 50px;
    height: 90vh;
    overflow: hidden;
    text-align: center;
    justify-content: center;
    align-items: center;
    margin-bottom: 0;
}

.masthead h2 {
    margin-top: 0;
    margin-bottom: 0;
    text-align: center;
    font-size: 3rem;
}

.masthead .social-icon {
    padding: 15px;
    position: absolute;
    bottom: 100px;
    display: flex;
    justify-content: space-between;
    width: 20%;
    gap: 15px;
}

.masthead .social-icon a {
    color:rgb(191, 191, 191);
    font-size: 2em;
    transition: color 0.3s ease, transform 0.3s ease;
}

.masthead .social-icon a:hover {
    color: white;
    transform: rotate(360deg);
}

@media (max-width: 600px) {
    .social-icon {
        gap: 10px;
    }
}

/*Body Part*/
.main {
    padding: 10px;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("../pic/jianyue-min.jpg") no-repeat center center fixed;
    color: rgb(200, 200, 200);
    overflow: hidden;
}

#introduction{
    text-align: center;
}

#introduction h2 {
    margin-bottom: 0;
}

#introduction p {
    margin-top: 0;
    padding-top: 5px;
    font-style: italic;
    color: rgb(165, 165, 165);
}

.fade-in {
    opacity: 1 !important;
}

.fade-target {
    opacity: 0;
    transition: opacity 1s ease-out;
}

.line {
    width: 90%;
    height: 2px;
    background-color: rgb(200, 200, 200);
    margin: 20px auto;
}

.about-me {
    padding-top: 50px;
    width: 80%;
    margin: 20px auto;
    display: flex;
    gap: 100px;
}

.about-me .photo {
    margin-top: 45px;
    float: left;
}

.about-me .photo img {
    width: 250px;
    height: 250px;
    border-radius: 30%;
}

.about-me .sentence {
    float: right;
    text-align: left;
    display: flex;
    flex-direction: column;
    position: relative;
}

.about-me .sentence p {
    color: rgb(165, 165, 165);
}

.about-me .sentence h4 {
    margin-top: 20px;
    white-space: nowrap;
    position: relative;
}

.aphorism-container {
    position: absolute;
    overflow: hidden;
    text-overflow: ellipsis;
    top: 0;
    left: 0;
    width: 100%;
}

.btn {
    width: 250px;
    height: 70px;
    margin-top: 12vh;
    margin-bottom: 5vh;
    background: linear-gradient(90deg, #7a81bb, #588f65);
    border: none;
    border-radius: 20px;
    color: white;
    padding: 20px 20px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s ease, color 0.15s ease;
}

.btn:hover {
    background: linear-gradient(90deg, #726f9d, #404257);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(1px);
    color:#333;
}

#skill{
    margin-top: 30vh;
    text-align: center;
}

#skill h2 {
    margin-bottom: 0;
}

#skill p {
    margin-top: 0;
    padding-top: 5px;
    font-style: italic;
    color: rgb(165, 165, 165);
}

.skill-scale {
    padding-top: 50px;
    width: 80%;
    margin: 20px auto;
}

.skill-scale p {
    padding-left: 20px;
    color: rgb(165, 165, 165);
}

.fa-caret-right {
    padding-right: 10px;
}

.skill-scale a {
    color: rgb(165, 165, 165);
    text-decoration: none;
    transition: color 0.3s ease;
}

.skill-scale a:hover {
    color: white;
}

#portfolio{
    margin-top: 30vh;
    text-align: center;
}

#portfolio h2 {
    margin-bottom: 0;
}

#portfolio p {
    margin-top: 0;
    padding-top: 5px;
    font-style: italic;
    color: rgb(165, 165, 165);
}

.slidershow {
    padding-top: 50px;
    width: 80%;
    max-width: 800px;
    margin: 20px auto;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    margin-bottom: 250px;
}

.swipe {
    position: relative;
    width: 100%;
    text-align: center;
    overflow: hidden;
    box-sizing: border-box;
}

.swipe ul {
    display: flex;
    padding: 0;
    margin: 0;
    width: 300%;
    transition: transform 0.5s;
}

.swipe li {
    width: 100%;
    height: 500px;
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    box-sizing: border-box;
}

.swipe a {
    color: rgb(200, 200, 200);
    text-decoration: none;
    transition: color 0.3s ease;
}

.swipe a:hover {
    color: white;
}

.swipe li:nth-child(1) {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("../pic/shell.png") no-repeat center center fixed;
    background-size: cover;
}

.swipe li:nth-child(2) {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("../pic/flappybird-min.jpg") no-repeat center center fixed;
    background-size: cover;
}

.swipe li:nth-child(3) {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), #555 no-repeat center center fixed;
    background-size: cover;
}

.indicators {
    position: absolute;
    bottom: 10px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 10;
}

.indicators label {
    width: 20px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: 0.3s;
    cursor: pointer;
}

#indicator1:checked ~ ul {
    transform: translateX(0);
}

#indicator2:checked ~ ul {
    transform: translateX(-33.33%);
}

#indicator3:checked ~ ul {
    transform: translateX(-66.66%);
}

#indicator1:checked ~ .indicators label[for="indicator1"],
#indicator2:checked ~ .indicators label[for="indicator2"],
#indicator3:checked ~ .indicators label[for="indicator3"] {
    background: #fff;
}

/* footer */
.footer {
    background: #2a2a2a;
    color: #fff;
    padding: 20px 0;
    text-align: center;
    width: 100%;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.social {
    margin-bottom: 10px;
}

.social a {
    margin: 0 10px;
    color: rgb(200, 200, 200);
    font-size: 1.5em;
    transition: color 0.3s ease;
}

.social a:hover {
    color:#5e8266;
}

.footer-bottom {
    color: #bbb;
    font-size: 0.9em;
}