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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #111;
    color: orange;
    display: flex;
    height: 100%;
    width: 100%;
}

.layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.sidebar {
    background-color: #222;
    width: 200px;
    padding: 20px;
    display: flex;

    flex-direction: column;
}

.sidebar nav a {
    color: orange;
    display: block;
    margin-bottom: 10px;
    text-decoration: none;
}

.main-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

header {
    background-color: #222;
    padding: 20px;
    text-align: center;
}

main {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    text-align: center;
}

.site-footer {
    background-color: #222;
    color: orange;
    text-align: center;
    padding: 10px 0;
}

h2 {
    border-bottom: 2px solid darkred;
    padding-bottom: 5px;
}

.slideshow-container {
    position: relative;
    max-width: 800px;
    margin: auto;
}

.slide {
    display: none;
}

.slide img {
    width: 100%;
    height: auto;
    cursor: pointer;
}

.popup {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
    color: orange;
}

.popup-content {
    background: #222;
    padding: 20px;
    max-width: 600px;
    text-align: center;
}

.popup video {
    width: 100%;
    height: auto;
}