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

body {
    font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;
    background-color: whitesmoke;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

::selection {
    background-color: gold;
}

.center {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.iframe-container,
iframe {
    width: 80%;
    max-width: 1200px;
    height: auto;
    aspect-ratio: 16 / 9;
}

iframe {
    width: 80vw;
    height: 500px;
    max-height: 60vh;
    border: 1px solid black;
    background-color: white;
    filter: drop-shadow(0 0 2px gray) drop-shadow(0 1px 2px gray);
    z-index: 99;
    transition: filter 0.25s;
}

iframe:hover {
    filter: drop-shadow(0 0 2px gray) drop-shadow(0 1px 2px gray) drop-shadow(0 0 5px gold);
}

.iframe-container {
    position: relative;
    width: 80vw;
    height: 500px;
    max-height: 60vh;
}

#iframe-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    background: transparent;
    cursor: pointer;
}

.link-bottom {
    margin-top: 20px;
    text-align: center;
    transition: transform 0.5s;
}

.link-bottom:hover {
    transform: scale(1.05);
}

.link-bottom a {
    background-color: lightyellow;
    color: blue;
    text-decoration: none;
    padding: 0.5rem;
    border: 1px solid black;
    transition: background-color 0.25s;
    text-overflow: ellipsis;
}

.link-bottom a:hover {
    background-color: yellow;
}

.quick-links {
    width: 100%;
    display: flex;
    justify-content: space-around;
    margin-bottom: 1rem;
}

.quick-links a {
    background-color: rgb(221, 221, 255);
    color: blue;
    text-decoration: none;
    padding: 0.5rem;
    border: 1px solid black;
    transition: background-color 0.25s;
    text-overflow: ellipsis;
}

.quick-links a:hover {
    background-color: blue;
    color: yellow;
}

.controls {
    text-align: center;
}

.control-button {
    width: 100px;
    cursor: pointer;
    border: none;
    background: none;
    filter: drop-shadow(0 0 2px gray) drop-shadow(0 1px 2px gray);
    transition: filter 0.25s, transform 0.25s;
}

.control-button:hover {
    filter: drop-shadow(0 0 2px gray) drop-shadow(0 1px 2px gray) drop-shadow(0 0 5px gold);
    transform: scale(1.01);
}

.modal-container {
    position: relative;
    float: right;
    padding-right: 0.3rem;
}

.modal {
    position: fixed;
    z-index: 99999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: rgba(255, 255, 255, 0.75);
    padding: 1rem 2rem;
    border: 1px solid gray;
    border-radius: 10px;
    filter: drop-shadow(0 0 2px gray) drop-shadow(0 1px 2px gray) drop-shadow(0 0 10px gold);
    width: 80%;
    max-width: 600px;
    position: relative;
}

mark {
    background-color: #ffd70050;
    font-weight: 500;
}

.info-btn {
    padding-right: 0.3rem;
    font-size: 1rem;
    text-shadow: 0 0 5px gold;
    cursor: pointer;
    background: none;
    border: none;
    transition: transform 0.25s;
}

.info-btn:hover {
    transform: scale(1.25);
}

body>div:nth-child(2) {
    display: none !important;
}