yggdrasil/input.css

@import "tailwindcss";

@custom-variant dark (&:where(.dark, .dark *));

@theme {
  --font-serif: 'Source Serif 4', 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', Georgia, serif;

  --color-paper-theme: #faf9f6;
  --color-paper-entry: #ffffff;
  --color-paper-primary: #1c1917;
  --color-paper-secondary: #78716c;
  --color-paper-tertiary: #d6d3d1;
  --color-paper-content: #292524;
  --color-paper-code-block: #eff1f5;
  --color-paper-code-bg: #f5f4f0;
  --color-paper-border: #e7e5e0;
  --color-paper-accent: #5c7a5e;
  --color-paper-accent-soft: #e8f0e8;

  --radius-paper: 8px;
  --gap-paper: 24px;
  --content-gap-paper: 20px;
  --nav-width-paper: 1024px;
  --main-width-paper: 720px;
}

@layer base {
  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--color-paper-theme);
    color: var(--color-paper-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  .dark {
    --color-paper-theme: #141416;
    --color-paper-entry: #1e1f22;
    --color-paper-primary: #e7e5df;
    --color-paper-secondary: #8c8981;
    --color-paper-tertiary: #3a3a3d;
    --color-paper-content: #d4d2cc;
    --color-paper-code-block: #1e1e2e;
    --color-paper-code-bg: #28292d;
    --color-paper-border: #2a2b2e;
    --color-paper-accent: #7da97f;
    --color-paper-accent-soft: #1e2e1e;
  }
}

@layer components {
  .post-single {
    margin: 0 auto;
  }

  .post-header {
    margin: 24px auto var(--content-gap-paper) auto;
  }

  .post-title {
    font-size: 40px;
    line-height: 1.2;
    color: var(--color-paper-primary);
    word-break: break-word;
    letter-spacing: -0.02em;
  }

  .post-description {
    margin-top: 10px;
    color: var(--color-paper-secondary);
    font-size: 16px;
    line-height: 1.7;
  }

  .post-meta {
    margin-top: 5px;
    color: var(--color-paper-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .post-meta a {
    color: var(--color-paper-secondary);
    text-decoration-style: dotted;
    text-underline-offset: 0.3rem;
    text-decoration: underline;
  }

  .post-meta a:hover {
    color: var(--color-paper-primary);
  }

  .breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.2rem;
    color: var(--color-paper-secondary);
    font-size: 14px;
    margin-bottom: 10px;
  }

  .breadcrumbs a {
    font-size: 16px;
    color: var(--color-paper-primary);
  }

  .breadcrumbs a:hover {
    text-decoration: underline;
    text-underline-offset: 0.2rem;
  }

  .entry-hint {
    display: inline-flex;
    margin-left: 0.5rem;
    color: var(--color-paper-secondary);
  }

  details.toc {
    margin-bottom: var(--content-gap-paper);
    background: var(--color-paper-code-bg);
    border-radius: var(--radius-paper);
    border: 1px solid var(--color-paper-border);
  }

  details.toc summary {
    padding: 0.3rem 1.2rem;
    border-radius: var(--radius-paper);
    cursor: pointer;
    display: list-item;
    width: 100%;
    user-select: none;
    color: var(--color-paper-primary);
  }

  details.toc .title {
    display: inline;
    font-weight: 500;
    margin-inline-start: 0.2rem;
  }

  details.toc .inner {
    margin: 0 2.4rem;
    padding-bottom: 0.6rem;
  }

  details.toc ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  details.toc li {
    margin: 0.3rem 0;
  }

  details.toc a {
    color: var(--color-paper-secondary);
    text-decoration: none;
    font-size: 14px;
  }

  details.toc a:hover {
    color: var(--color-paper-primary);
    text-decoration: underline;
    text-underline-offset: 0.3rem;
  }

  details.toc li ul {
    margin-inline-start: var(--gap-paper);
  }

  details {
    interpolate-size: allow-keywords;
  }

  details::details-content {
    height: 0;
    opacity: 0;
    overflow: clip;
    transition: height 150ms ease, opacity 150ms ease, content-visibility 150ms allow-discrete;
  }

  details[open]::details-content {
    height: auto;
    opacity: 1;
  }

  .entry-cover {
    margin-bottom: var(--content-gap-paper);
  }

  .entry-cover img {
    border-radius: var(--radius-paper);
    width: 100%;
    height: auto;
  }

  .post-content {
    color: var(--color-paper-content);
    margin: 30px 0;
  }

  .md-content h1 {
    margin: 40px auto 32px;
    font-size: 40px;
    color: var(--color-paper-primary);
    letter-spacing: -0.01em;
  }

  .md-content h2 {
    margin: 32px auto 24px;
    font-size: 32px;
    color: var(--color-paper-primary);
    letter-spacing: -0.01em;
  }

  .md-content h3 {
    margin: 24px 0 16px;
    font-size: 24px;
    color: var(--color-paper-primary);
  }

  .md-content h4 {
    margin: 24px 0 16px;
    font-size: 16px;
    color: var(--color-paper-primary);
  }

  .md-content h5 {
    margin: 24px 0 16px;
    font-size: 14px;
    color: var(--color-paper-primary);
  }

  .md-content h6 {
    margin: 24px 0 16px;
    font-size: 12px;
    color: var(--color-paper-primary);
  }

  .md-content a:not(.anchor) {
    text-underline-offset: 0.3rem;
    text-decoration: underline;
    color: var(--color-paper-accent);
  }

  .md-content a:not(.anchor):hover {
    color: #4a6249;
  }

  .md-content p {
    margin-bottom: var(--content-gap-paper);
    line-height: 1.85;
  }

  .md-content p:last-child {
    margin-bottom: 0;
  }

  .md-content blockquote {
    margin: 1rem 0;
    padding-inline-start: 1rem;
    border-inline-start: 0.3rem solid var(--color-paper-content);
    color: var(--color-paper-secondary);
  }

  .md-content blockquote p:last-child {
    margin-bottom: 0;
  }

  .md-content ol,
  .md-content ul {
    padding-inline-start: 1.25rem;
    margin-bottom: var(--content-gap-paper);
  }

  .md-content li {
    margin-top: 0.3rem;
  }

  .md-content li p {
    margin-bottom: 0;
  }

  .md-content hr {
    margin: 30px 0;
    height: 2px;
    background: var(--color-paper-tertiary);
    border: 0;
  }

  .md-content table {
    margin-bottom: var(--content-gap-paper);
    width: 100%;
    border-collapse: collapse;
  }

  .md-content table th,
  .md-content table td {
    min-width: 80px;
    padding: 6px 13px;
    line-height: 1.5;
    border: 1px solid var(--color-paper-border);
  }

  .md-content table th {
    text-align: start;
    font-weight: 600;
    background: var(--color-paper-code-bg);
  }

  .md-content img {
    border-radius: var(--radius-paper);
    margin: 1rem 0;
    max-width: 100%;
    height: auto;
  }

  .md-content-img-zoomable {
    cursor: zoom-in;
    transition: opacity 0.2s ease-out;
  }

  .md-content-img-zoomable:hover {
    opacity: 0.9;
  }

  .md-content iframe {
    max-width: 100%;
    border-radius: var(--radius-paper);
  }

  .md-content code {
    padding: 0.2rem 0.3rem;
    font-size: 0.85em;
    line-height: 1.5;
    background: var(--color-paper-code-bg);
    border-radius: 0.2rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  }

  .md-content pre {
    position: relative;
    margin-bottom: var(--content-gap-paper);
    background: var(--color-paper-code-block);
    border-radius: var(--radius-paper);
    overflow-x: auto;
  }

  .md-content pre code {
    display: block;
    padding: 16px;
    background: transparent;
    border-radius: 0;
    overflow-x: auto;
    white-space: pre;
    font-size: 0.85em;
    line-height: 1.6;
  }

  .md-content pre code span {
    display: inline !important;
  }

  .copy-code {
    display: none;
    position: absolute;
    top: 8px;
    right: 8px;
    color: rgba(255, 255, 255, 0.8);
    background: rgba(78, 78, 78, 0.8);
    border-radius: var(--radius-paper);
    padding: 4px 8px;
    font-size: 12px;
    user-select: none;
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: background 0.2s ease-out;
  }

  .copy-code:hover {
    background: rgba(92, 122, 94, 0.9);
  }

  pre:hover .copy-code,
  .highlight:hover .copy-code {
    display: block;
  }

  .anchor {
    display: none;
    text-decoration: none;
    color: var(--color-paper-secondary);
  }

  .md-content h1:hover .anchor,
  .md-content h2:hover .anchor,
  .md-content h3:hover .anchor,
  .md-content h4:hover .anchor,
  .md-content h5:hover .anchor,
  .md-content h6:hover .anchor {
    display: inline-flex;
    margin-inline-start: 0.5em;
    font-weight: 500;
    user-select: none;
    text-decoration: none;
    color: var(--color-paper-secondary);
  }

  .anchor:hover {
    color: var(--color-paper-primary) !important;
  }

  .post-footer {
    margin-top: var(--content-gap-paper);
  }

  .post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 0 0 var(--content-gap-paper) 0;
  }

  .post-tags li {
    display: inline-block;
  }

  .post-tags a {
    display: block;
    padding: 0 14px;
    color: var(--color-paper-secondary);
    font-size: 14px;
    line-height: 34px;
    background: var(--color-paper-code-bg);
    border-radius: var(--radius-paper);
    border: 1px solid var(--color-paper-border);
    text-decoration: none;
    transition: all 0.2s ease-out;
  }

  .post-tags a:hover {
    background: var(--color-paper-accent-soft);
    border-color: var(--color-paper-accent);
    color: var(--color-paper-accent);
  }

  .paginav {
    display: flex;
    border-radius: var(--radius-paper);
    background: var(--color-paper-code-bg);
    border: 1px solid var(--color-paper-border);
    overflow: hidden;
  }

  .paginav a {
    width: 50%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.8rem;
    text-decoration: none;
    color: var(--color-paper-primary);
    transition: background 0.2s ease-out;
  }

  .paginav a:hover {
    background: var(--color-paper-border);
  }

  .paginav .next {
    margin-inline-start: auto;
    text-align: right;
  }

  .paginav .title {
    letter-spacing: 1px;
    font-size: 0.8rem;
    color: var(--color-paper-secondary);
  }

  .paginav .post-title-nav {
    font-size: 16px;
    font-weight: 500;
  }

  .back-to-home {
    margin-top: calc(var(--content-gap-paper) * 1.5);
    padding-top: var(--content-gap-paper);
    border-top: 1px solid var(--color-paper-border);
  }

  .back-to-home a,
  .back-to-home button {
    color: var(--color-paper-secondary);
    font-size: 14px;
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: inherit;
  }

  .back-to-home a:hover,
  .back-to-home button:hover {
    color: var(--color-paper-primary);
    text-decoration: underline;
    text-underline-offset: 0.3rem;
  }

  .image-viewer-overlay {
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.2s ease-out;
  }

  .image-viewer-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
  }

  .image-viewer-img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-paper);
  }

  .image-viewer-close {
    position: absolute;
    top: -2.5rem;
    right: 0;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease-out;
  }

  .image-viewer-close:hover {
    background: rgba(255, 255, 255, 0.4);
  }

  .md-image-lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.2s ease-out;
  }

  .md-image-lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
  }

  .md-image-lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-paper);
  }

  .md-image-lightbox-close {
    position: absolute;
    top: -2.5rem;
    right: 0;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease-out;
  }

  .md-image-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.4);
  }

  .post-card-cover {
    overflow: hidden;
    border-radius: var(--radius-paper);
  }

  .post-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease-out;
  }

  .post-card-cover:hover img {
    transform: scale(1.05);
  }

  a.accent-link {
    color: var(--color-paper-accent);
    text-decoration: none;
    transition: color 0.2s ease-out;
  }
  a.accent-link:hover {
    color: var(--color-paper-primary);
  }

  .post-card-accent {
    position: relative;
  }
  .post-card-accent::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-paper-accent);
    transition: width 0.3s ease-out;
  }
  .post-card-accent:hover::after {
    width: 100%;
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media screen and (max-width: 768px) {
  .post-title {
    font-size: 32px;
  }

  .md-content h1 {
    font-size: 32px;
  }

  .md-content h2 {
    font-size: 26px;
  }

  .md-content h3 {
    font-size: 20px;
  }

  .paginav {
    flex-direction: column;
  }

  .paginav a {
    width: 100%;
  }

  .paginav .next {
    margin-inline-start: 0;
    text-align: left;
    border-top: 1px solid var(--color-paper-border);
  }

  details.toc .inner {
    margin: 0 1rem;
  }
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-enter {
  animation: pageEnter 0.15s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  details::details-content {
    transition: none;
  }

  .page-enter {
    animation: none;
  }
}

/* ========== Blur-up 渐进图片加载 ========== */
.blur-img {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: var(--ar);
  /* 加载中灰底（占位图未加载完时） */
  background: var(--color-paper-code-bg, #f5f5f5);
  border-radius: 6px;
  margin: 1em 0;
}
.blur-img-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 20px 占位图放大后模糊，scale 遮边缘 */
  filter: blur(20px) saturate(1.2);
  transform: scale(1.1);
}
.blur-img-full {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
}
.blur-img-full.is-loaded {
  opacity: 1;
}

/* 暗色模式灰底 */
.dark .blur-img {
  background: var(--color-paper-code-bg, #2a2a2a);
}