@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&display=swap");

:root {
    --clr-primary-500: #333333;
    --clr-primary-400: #545454;
    --clr-primary-350: #dddddd;
    --clr-primary-300: #e1c0b6;
    --clr-primary-100: #ffffff;
    --clr-accent-400: #1e6c8e;
}

* {
    box-sizing: border-box;
    margin: 0;
}

html,
body {
    font-family: "Noto Sans TC", sans-serif;
    margin: 0;
    padding: 0;
    position: relative;
    scroll-behavior: smooth;;
}

h1,
h2,
h3,
p {
    color: var(--clr-primary-400);
}

img {
    max-width: 100%;
}

nav {
    position: fixed;
    top: 0;
    box-shadow: 0px 3px 3px 2px rgba(0, 0, 0, 0.1);
    border: none;
    width: 100%;
    background-color: var(--clr-primary-100);
    padding: 10px 0;
    margin: 0;
    z-index: 1000;
    transition: overflow 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5vw;
    max-width: 1500px;
    margin: 0 auto;
}

@media (min-width: 1500px) {
    .nav-content {
        padding: 0 75px;
    }
}

.nav-title,
.nav-title-text {
    display: flex;
    align-items: center;
}

.nav-title img {
    width: 50px;
    object-fit: contain;
}

.nav-title-text {
    padding-left: 25px;
}

.nav-title-text p {
    font-weight: 400;
    font-size: 1.1875rem;
    margin: 0 5px;
}

.nav-title-text h2 {
    font-weight: 700;
    margin: 0;
    padding: 0 5px;
    font-size: 3rem;
}

@media (max-width: 420px) {
    .nav-title img {
        width: 35px;
    }
    .nav-title-text {
        padding-left: 10px;
    }
    .nav-title-text p {
        font-size: 1rem;
    }
    .nav-title-text h2 {
        font-size: 2.5rem;
    }
}

@media (max-width: 325px) {
    .nav-title img {
        width: 30px;
    }
    .nav-title-text {
        padding-left: 10px;
    }
    .nav-title-text p {
        font-size: 1rem;
    }
    .nav-title-text h2 {
        font-size: 2rem;
    }
}

.toggle-btn {
    display: none;
    position: absolute;
    top: 2.75rem;
    right: 5vw;
    width: 2rem;
    height: 5px;
    background-color: var(--clr-primary-400);
    z-index: 999;
    transform-origin: center;
    transition: width 0.3s ease;
}

.toggle-btn::before {
    content: "";
    position: absolute;
    top: -0.75rem;
    right: 0;
    width: 1rem;
    height: 5px;
    background-color: var(--clr-primary-400);
    transition: all 0.3s ease;
    transform-origin: right center;
}

.toggle-btn::after {
    content: "";
    position: absolute;
    top: 0.75rem;
    right: 0;
    width: 2rem;
    height: 5px;
    background-color: var(--clr-primary-400);
    transition: all 0.3s ease;
    transform-origin: right center;
}

.toggle-btn {
    transform: scale(0.9);
}

.toggle-btn.active {
    width: 0rem;
}

.toggle-btn.active::before {
    width: 2.1rem;
    transform: rotate(-45deg);
}

.toggle-btn.active::after {
    width: 2.1rem;
    transform: rotate(45deg);
}

@media (max-width: 420px) {
    .toggle-btn {
        top: 2.25rem;
    }
}

@media (max-width: 325px) {
    .toggle-btn {
        top: 2rem;
    }
}

.toggle-btn:hover {
    cursor: pointer;
}

.nav-links ul {
    margin: 0;
    padding: 0;
    display: flex;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--clr-primary-400);
    display: block;
    font-size: 1.2rem;
    padding: 1rem;
}

.nav-links a:hover {
    color: var(--clr-primary-500);
}

@media (max-width: 930px) {
    .nav-links {
        display: none;
    }

    .nav-links.active {
        display: block;
        position: absolute;
        top: 0;
        right: -45%;
        width: 45%;
        background-color: var(--clr-primary-100);
        padding-top: 90px;
        height: 100vh;
        z-index: 998;
        animation: fadein 0.5s ease forwards;
        box-shadow: -100vw 0px 0px 100vw rgba(0, 0, 0, 0.5);
    }
    .nav-links ul {
        padding-top: 1rem;
        flex-direction: column;
        justify-content: space;
        align-items: center;
    }
    .nav-links a {
        padding: 2rem;
    }
    .toggle-btn {
        display: block;
    }
}

@keyframes fadein {
    to {
        right: 0;
    }
}

.scroll-bar {
    position: fixed;
    z-index: 998;
}

@media (min-width: 768px) {
    .scroll-bar {
        top: 50%;
        right: 20px;
        -webkit-transform: translateY(-50%);
        transform: translateY(-50%);
    }
}

.scroll-bar ul {
    margin: 0;
    padding: 0;
}

.scroll-bar li {
    list-style: none;
}

.scroll-bar a {
    text-decoration: none;
    color: var(--clr-primary-400);
    writing-mode: vertical-lr;
    text-orientation: upright;
    display: block;
    font-size: 1.075rem;
    font-weight: 400;
    padding: 0.3rem 0.1rem 0rem 0.1rem;
    margin: 1rem;
    background-color: transparent;
    letter-spacing: 4px;
    text-align: center;
    border-radius: 3px;
}

.scroll-bar a:hover {
    color: var(--clr-primary-500);
}

@media (min-width: 768px) {
    .scroll-bar a {
        transition: all 50ms linear;
    }
    .scroll-bar a.active {
        color: var(--clr-primary-100);
        background-color: var(--clr-primary-400);
        font-weight: 300;
    }
}

@media (max-width: 768px) {
    .scroll-bar {
        height: fit-content;
        top: 89px;
        left: 0px;
        width: 100%;
        transform: translateY(0);
        background-color: var(--clr-primary-400);
    }
    .scroll-bar ul {
        display: flex;
        justify-content: space-evenly;
        align-items: center;
    }
    .scroll-bar a {
        font-size: 1.2rem;
        writing-mode: horizontal-tb;
        color: var(--clr-primary-100);
        padding-bottom: 0.3rem;
        margin: 0.8rem 0.5rem;
    }
    .scroll-bar a:hover {
        color: var(--clr-primary-100);
    }
}

@media (max-width: 420px) {
    .scroll-bar {
        top: 77px;
    }
    .scroll-bar a {
        font-size: 1rem;
        margin: 0.5rem;
    }
}

@media (max-width: 325px) {
    .scroll-bar {
        top: 65px;
    }
    .scroll-bar a {
        font-size: 0.7rem;
        padding: 0.1rem 0.1rem;
    }
}

.sessions {
    transition: font-size 0.2s ease;
}

@media (max-width: 520px) {
    .sessions {
        font-size: 3vw;
    }
}

@media (max-width: 445px) {
    .sessions {
        font-size: 2.5vw;
    }
}

@media (max-width: 380px) {
    .sessions {
        display: none;
    }
}

.content {
    position: relative;
    max-width: 1500px;
    margin: 0 auto;
}

header img {
    width: 100%;
    padding: 0 8vw;
    padding-top: calc(10vh + 89px);
    margin: 0 auto;
}

@media (max-width: 768px) {
    header img {
        padding: calc(17.5vh + 89px) 0 0 0;
    }
}

@media (min-width: 1500px) {
    header img {
        padding-left: 120px;
        padding-right: 120px;
    }
}

.anchor {
    display: block;
    padding-bottom: 4rem;
}

@media (max-width: 768px) {
    .anchor {
        padding-bottom: 7rem;
    }
}

.content-description {
    padding: 0 5vw;
}

@media (min-width: 1500px) {
    .content-description {
        padding: 0 75px;
    }
}

.content-description h1 {
    padding: 2.5rem 0;
    font-size: 4rem;
}

.video219 {
    margin: 0 auto;
    position: relative;
    width: 90%;
    height: 0;
    padding-bottom: 38.565%;
}

.video169 {
    margin: 0 auto;
    position: relative;
    width: 90%;
    height: 0;
    padding-bottom: 50.625%;
}

@media (max-width: 768px) {
    .video219,
    .video169 {
        width: 100%;
    }
    .video219 {
        padding-bottom: 42.85%;
    }
    .video169 {
        padding-bottom: 56.25%;
    }
}

iframe,
.iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
}

@media (max-width: 420px) {
    .content-description h1 {
        font-size: 3.5rem;
    }
}

@media (max-width: 320px) {
    .content-description h1 {
        font-size: 3em;
    }
}

h1 a,
h1 a:visited {
    vertical-align: middle;
    font-size: 1.5rem;
    text-decoration: none;
    color: var(--clr-accent-400);
    display: inline;
    padding-bottom: 0.5rem;
}

@media (max-width: 420px) {
    h1 a,
    h1 a:visited {
        font-size: 1.25rem;
    }
}

.container img {
    border-radius: 50%;
}

.split {
    display: flex;
    align-items: center;
}

.split.active {
    align-items: flex-start;
}

@media (max-width: 1000px) {
    .split {
        flex-direction: column;
    }
}

.big-container {
    width: 50%;
}

@media (max-width: 1000px) {
    .big-container {
        width: 100%;
    }
}

.scripting {
    display: none;
}

.container {
    display: flex;
    padding-right: 5rem;
    padding-bottom: 2.5rem;
    justify-content: space;
    align-items: center;
}

@media (max-width: 768px) {
    .container {
        padding-right: 0;
    }
}

.container-left {
    width: 40%;
    padding-right: 2rem;
}

.container-left img {
    width: 100%;
}

@media (max-width: 420px) {
    .container-left {
        padding-right: 1.25rem;
    }
}

.btn {
    width: max-content;
    padding: 0.4rem;
    margin: 1rem auto;
    background-color: var(--clr-primary-400);
    border-radius: 0.4rem;
    transition: background-color 0.2s ease;
}

.btn:hover {
    cursor: pointer;
    background-color: var(--clr-primary-350);
}

.btn p {
    font-size: 1rem;
    margin: 2px;
    text-align: center;
    color: var(--clr-primary-100);
    position: relative;
}

@media (max-width: 420px) {
    .btn,
    .btn *,
    .btn *::before,
    .btn *::after {
        transform: scale(0.95);
    }
}

@media (max-width: 340px) {
    .btn * {
        transform: scale(0.8);
    }
}

.indicator {
    position: relative;
    top: -1px;
    margin-left: 4px;
    vertical-align: middle;
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    border: 1px solid var(--clr-primary-100);
    white-space: pre-wrap;
}

.indicator::before {
    content: "";
    width: 1.5px;
    height: 5.45px;
    top: 5px;
    right: 5px;
    transform: rotate(45deg);
    display: block;
    position: absolute;
    background-color: var(--clr-primary-100);
    transform-origin: center;
    transition: transform 0.3s ease;
}
.indicator::after {
    content: "";
    width: 1.5px;
    height: 5.45px;
    top: 5px;
    left: 5px;
    transform: rotate(-45deg);
    display: block;
    position: absolute;
    background-color: var(--clr-primary-100);
    transform-origin: center;
    transition: transform 0.25s ease;
}

.indicator.active::before {
    transform: rotate(-45deg);
}

.indicator.active::after {
    transform: rotate(45deg);
}

.container-right {
    width: 60%;
}

.container-right h3 {
    font-size: 2.25rem;
    padding-bottom: 0.75rem;
}

.container-right p {
    font-size: 1.1rem;
    padding-bottom: 1rem;
}

@media (max-width: 325px) {
    .container-right h3 {
        font-size: 2rem;
    }
    .container-right p {
        font-size: 0.9rem;
    }
}

@media (max-width: 1000px) {
    #A2 .container-right p,
    #C2 .container-right p,
    #C3 .container-right p,
    #D4 .container-right p {
        padding-top: 0 !important;
        padding-bottom: 1rem !important;
    }
}

@media (max-width: 1250px) {
    #A2 .container-right p,
    #C2 .container-right p,
    #C3 .container-right p,
    #D4 .container-right p {
        padding-top: 9%;
        padding-bottom: 9%;
    }
}

@media (max-width: 1140px) {
    #D4 .container-right p {
        padding-top: 15%;
        padding-bottom: 15%;
    }
}

.container-right kc-line a {
    display: inline-block;
    margin-right: 0.5rem;
}

.container-right a,
.container-right a:visited {
    text-decoration: none;
    color: var(--clr-accent-400);
    display: block;
    padding-bottom: 0.5rem;
}

.description {
    display: none;
    position: relative;
    margin-top: -1rem;
    margin-right: 5rem;
    margin-bottom: 2.5rem;
    box-shadow: 5px 5px 3px 5px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .description {
        margin-right: 0;
    }
}

.description.active {
    display: block;
    animation: fadedown 0.5s ease forwards;
}

@keyframes fadedown {
    from {
        opacity: 0;
        top: -1rem;
    }
    to {
        opacity: 1;
        top: 0;
    }
}

.description p {
    text-indent: 2rem;
    padding: 1.5rem 2rem;
    line-height: 1.7;
}

.description .no-indent {
    text-indent: 0;
    font-weight: 700;
}

.description p + p {
    padding-top: 0;
}

@media (max-width: 768px) {
    .description p {
        padding: 1.5rem 1rem;
    }
}

footer {
    background-color: var(--clr-primary-400);
    margin-top: 35vh;
}

.footer-content {
    margin: 0 auto;
    max-width: 1500px;
    padding: 1rem 5vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content p {
    color: var(--clr-primary-100);
    font-weight: 500;
}