:root {
    --font-family: 'Noto Serif SC', serif;
    --line-height: 1.8;
    --primary: #1e88e5;
    --card-box-shadow: 0 15px 35px rgba(50, 50, 93, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07) !important;
}

:root:not([data-theme=dark]), [data-theme=light] {
    --del-color: color: rgba(23, 43, 77, 0.5);
}

@media only screen and (prefers-color-scheme: dark) {
    :root:not([data-theme=light]) {
        --del-color: color: rgba(23, 43, 77, 0.5);
    }
}

[data-theme=dark] {
    --del-color: color: rgba(23, 43, 77, 0.5);
}

@media (min-width:576px) { :root { --font-size:17px } }
@media (min-width:768px) { :root { --font-size:17px } }
@media (min-width:992px) { :root { --font-size:17px } }
@media (min-width:1200px) { :root { --font-size:17px } }

@media (min-width: 576px) {
    body > footer, body > header, body > main, section {
        --block-spacing-vertical:calc(var(--spacing) * 1)
    }
}
@media (min-width: 768px) {
    body > footer, body > header, body > main, section {
        --block-spacing-vertical:calc(var(--spacing) * 1.5)
    }
}
@media (min-width: 992px) {
    body > footer, body > header, body > main, section {
        --block-spacing-vertical:calc(var(--spacing) * 1.75)
    }
}
@media (min-width: 1200px) {
    body > footer, body > header, body > main, section {
        --block-spacing-vertical: calc(var(--spacing) * 2);
    }
}

html{
    scroll-behavior: smooth;
}

.container {
    max-width: 768px;
}

body>header, body>footer, nav {
    text-align: center;
}

body>header {
    padding-top: calc(var(--spacing) * 4);
    padding-bottom: calc(var(--spacing) * 1);
}

section {
    margin-top: var(--block-spacing-vertical);
}

hr {
    --block-spacing-vertical: calc(var(--spacing) * 2);
    margin-top: var(--block-spacing-vertical);
    margin-bottom: var(--block-spacing-vertical);
}

/* What happened here? */
ol, ul {
    padding-inline-start: calc(var(--spacing) * 2)
}

/* 莫名其妙吧，margin-top 0？ */
h1, h2, h3, h4, h5, h6 {
    margin-top: var(--typography-spacing-vertical);
}

/* 莫名其妙吧，margin-bottom 默认设置这么大，有法看么 =_= */
h1 { --typography-spacing-vertical: 1.5rem; }
h2 { --typography-spacing-vertical: 1.25rem; }
h3 { --typography-spacing-vertical: 1.0rem; }
h4 { --typography-spacing-vertical: 0.75rem; }
h5 { --typography-spacing-vertical: 0.5rem; }

.meta-info {
    color: var(--muted-color);
}

.shadow {
    box-shadow: var(--card-box-shadow) !important;
}

.rounded {
    border-radius: var(--border-radius);
}

.circle {
    border-radius: 50%;
}

.headpic {
    border-radius: 100px;
}

.navbar {
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    padding: 0;

    position: sticky;
    top: -1px; /* a little trick */
    z-index: 1020;

    --font-weight: 500;
    transition: .3s;
}

.navbar a .active {
    border-bottom: solid var(--primary);
}

nav {
    display: flex;
    flex-flow: row wrap;
    justify-content: center;
}

nav a { color: var(--secondary); }
nav a:hover { color: var(--secondary-hover); }
nav a:focus { color: var(--secondary-focus); }

/* 首页摘要里各种标题只用较大的粗体呈现 */
.summary h1, .summary h2, .summary h3, .summary h4, .summary h5 {
    --font-size: 1.125rem;
    --typography-spacing-vertical: 0.5rem;
    font-weight: bold;
    line-height: var(--line-height);
}

.alert {
    margin: var(--typography-spacing-vertical) 0;
    padding: var(--spacing);
    border-radius: var(--border-radius);
    box-shadow: var(--card-box-shadow);
    background-color: var(--primary);
    color: var(--primary-inverse);
    font-size: var(--font-size);
}

blockquote {
    --font-family: Kai, "Kaiti SC", Georgia, "Times New Roman", Times, KaiTi, BiauKai, 'Noto Serif SC', serif;
    border-left: 10px solid var(--blockquote-border-color);
    box-shadow: var(--card-box-shadow) !important;
    border-radius: var(--border-radius);
}
blockquote::before {
    --font-family: serif;
    font-family: var(--font-family);
    color: var(--blockquote-border-color);
    content: "“";
    font-size: calc(var(--font-size) * 5);
    /* vertical-align: -.4em; */
    line-height: 0;
}

code, kbd {
    padding: .2rem .3rem;
}

.post-content img {
    max-height: 600px;
}

.comment-ml {
    margin-left: 40px;
}

.badge {
    display: inline-block;
    padding: 0.35rem 0.375rem;
    font-size: 80%;
    text-align: center;
    vertical-align: baseline;
    line-height: 1;
    border-radius: 0.25rem;
    color: var(--secondary);
    background-color: var(--secondary-inverse);
}

.avatar {
    float: left;
    height: calc(var(--line-height) * 2rem);
    width: calc(var(--line-height) * 2rem);
    margin-right: 10px;
}

.icon-ua {
    height: 16px;
}

footer a {
    --color: var(--secondary);
}

#nis:before {
    content: url(../img/beian.png);
    vertical-align: middle;
    display: inline-block;
    line-height: var(--line-height);
}