html {
    margin: 0;
    padding: 0;
    color: #333;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #666;
}

a:hover {
    color: #333;
    text-decoration: underline;
}

body {
    margin: 0;
    padding: 0;
    background-color: #fcf4e6;
}

.mainframe {
    max-width: 800px;
    min-height: 100vh;
    margin: 0 auto;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
    row-gap: 10px;
}

@media screen and (max-width: 800px) {
    .mainframe {
        max-width: 100%;
        padding: 10px;
    }
}

.header {
    text-shadow: rgba(255, 255, 255, 0.9) 0 1px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 58px;
}

.navigator {
    display: flex;
    align-items: center;
    column-gap: 20px;
}

.app-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.app-list a {
    display: inline-block;
    padding: 2px 6px;
    background-color: #fcf4e6;
    text-decoration: none;
    color: #555;
    border-radius: 5px;
}

.app-list a.active {
    background-color: teal;
    color: white;
}

.app-list a:hover {
    text-decoration: none;
}

.app-container {
    display: none;
}

.app-container:first-child {
    display: block;
}

.app-container {
    padding: 10px;
}

.app-name,
.app-name a {
    color: chocolate;
    font-size: 1.5rem;
    font-weight: bold;
    padding: 10px 0;
}

.app-intro {
    font-size: 1.0rem;
    color: rgb(84, 84, 84);
}

p,
li {
    line-height: 2;
}

.app_img {
    display: block;
    height: auto;
    width: 128px;
    margin: 0 auto;
}

.copyright {
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 12px;
    color: #999;
    text-align: center;
}

hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 1px 0;
}

.top {
    width: 100%;
    margin: 0px 0px -50px 0px;
    z-index: -1;
    opacity: 0.3;
}

.bottom {
    width: 100%;
    margin: -100px 0px -10px 0px;
    z-index: -1;
    opacity: 0.3;
}