body {
    background-image: url('https://asset.watch.impress.co.jp/img/wf/docs/1551/165/image2.png');
    background-size: cover;
    font-family: Tahoma, sans-serif;
    margin: 0;
    padding: 0;
}

.taskbar {
    position: fixed;
    bottom: 0;
    width: 100%;
    height: 40px;
    background: linear-gradient(to bottom, #0033AA, #002288);
    display: flex;
    align-items: center;
    z-index: 1001;
    border-top: 2px solid #000;
    box-shadow: 0 -2px 3px rgba(0, 0, 0, 0.5);
}

.start {
    background: linear-gradient(to bottom, #00AA00, #008000);
    color: white;
    padding: 5px 15px;
    margin: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    border: 2px solid #004400;
    border-radius: 3px;
    box-shadow: inset -1px -1px 2px rgba(0, 0, 0, 0.5);
    font-weight: bold;
}

.start-icon {
    width: 20px;
    height: 20px;
    background: url('https://upload.wikimedia.org/wikipedia/commons/4/4e/Windows_XP_Start_button.png') no-repeat center;
    background-size: cover;
    margin-right: 5px;
}

.start-menu {
    display: none;
    position: fixed;
    bottom: 40px;
    left: 10px;
    width: 220px;
    background: linear-gradient(to bottom, #F0F0F0, #D0D0D0);
    border: 2px solid #808080;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
    z-index: 1002;
}

.start-menu ul {
    list-style: none;
    margin: 0;
    padding: 5px;
}

.start-menu ul li {
    padding: 5px;
    cursor: pointer;
    font-size: 14px;
    border-bottom: 1px solid #A0A0A0;
}

.start-menu ul li:hover {
    background-color: #0066CC;
    color: white;
}

.taskbar-windows {
    display: flex;
    align-items: center;
    margin-left: 10px;
}

.taskbar-windows .window-title {
    background: linear-gradient(to bottom, #0055DD, #0044BB);
    border: 1px solid #0033AA;
    margin: 0 5px;
    padding: 5px 10px;
    cursor: pointer;
    color: #FFF;
    border-radius: 2px;
}

.taskbar-windows .window-title.active {
    background: linear-gradient(to bottom, #0077FF, #0066DD);
}

.window {
    position: absolute;
    /*border: 2px solid #808080;*/
    background: #F0F0F0;
    /*box-shadow: 3px 3px 8px rgba(0, 0, 0, 0.5);*/
    z-index: 1;
    /*min-width: 200px;
    min-height: 150px;*/
}

.window .title-bar {
    /*background: linear-gradient(to bottom, #000080, #0000A0);*/
    color: white;
    padding: 5px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.window .title-bar-controls button {
    /*width: 16px;
    height: 16px;*/
    margin-left: 4px;
    cursor: pointer;
    border: none;
}

.window-body {
    /*padding: 10px;
    font-size: 14px;*/
}