body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f5f5;
}

.sidebar {
    width: 250px;
    height: 100vh;
    background: #2c3e50;
    padding: 20px 0;
    color: white;
}

.sidebar-header {
    text-align: center;
    padding: 0 20px 20px;
    border-bottom: 1px solid #34495e;
}

.sidebar-header h1 {
    font-size: 1.5em;
    margin: 0;
    padding: 10px 0;
}

.nav-section {
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 25px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s;
}

.nav-item:hover {
    background-color: #34495e;
    cursor: pointer;
}

.nav-item i {
    width: 25px;
    margin-right: 10px;
}

.nav-item form {
    width: 100%;
    display: flex;
    align-items: center;
}

.nav-item button {
    background: none;
    border: none;
    color: white;
    font-size: 1em;
    cursor: pointer;
    padding: 0;
    font-family: inherit;
}

.upload-label {
    cursor: pointer;
}

#fileInput:focus + .upload-label {
    outline: 1px dotted #fff;
}

/* 当文件被选中时的样式 */
#fileInput:active + .upload-label {
    color: #3498db;
}

/*
body {
	background-color: #c7edcc;
}


h2 {
	margin-top: 10px;
	color: #000;
}

form {
	margin: 0 auto;
	padding: 0 auto;
	border: 1px soild #ccc;
	border-radius: 1em;
}
	
.uploadbutton {
	width: 150px;
	height: 55px;
	background-color: #4caf50;
	color: white;
	border: none;
	border-radius: 5px;
	cursor: pointer;
}

.media {
	font-size: 20px;
	color: #ccc;
}

#fileinput {
	margin-bottom: 1em;
	color: #ccc;
}

#localvideofile {
	margin-bottom: 1em;
	color: #ccc;
}

#videoplayer {
	margin-top: 1em;
	align-content: center;
}

@media screen and (max-width: 480px) {
	body {
		background-color: lightgreen;
	}
}
*/