* {
  box-sizing: border-box;
}

body {
  font-family: SFPro,Arial,Noto Sans JP,Noto Sans KR,sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #333;
  font-size: 18px;
}

body.dark {
  background: #111;
  color: #eee;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.header {
  display: flex;
  align-items: center;
  margin-bottom: 4rem;
  position: relative;
}

.avatar {
  width: 80px;
  height: 80px;
  margin-right: 1.5rem;
  border-radius: 5%;
}

.header-content {
  flex: 1;
}

.site-title {
  font-size: 1.875rem;
  font-weight: 800;
  margin: 0 0 0.5rem 0;
  line-height: 1.2;
}

.links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.theme-toggle,
.back-button {
  background: none;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.75rem;
  cursor: pointer;
  color: #666;
  text-decoration: none;
  display: inline-block;
}

.theme-toggle {
  position: absolute;
  top: 0;
  right: 0;
}

.back-button {
  position: absolute;
  top: 0;
  left: 0;
}

.theme-toggle:hover,
.back-button:hover {
  background: #f8f8f8;
  color: #333;
  text-decoration: none;
}

body.dark .theme-toggle,
body.dark .back-button {
  border-color: #555;
  color: #aaa;
}

body.dark .theme-toggle:hover,
body.dark .back-button:hover {
  background: #333;
  color: #eee;
}

.links a, .links span {
  font-size: 0.875rem;
  color: #666;
}

.links a:hover {
  color: #06c;
}

body.dark .links a {
  color: #aaa;
}

body.dark .links a:hover {
  color: #6bf;
}

@media (max-width: 640px) {
  .header {
    gap: 1rem;
  }

  .avatar {
    width: 64px;
    height: 64px;
  }

  .site-title {
    font-size: 1.5rem;
  }
}

a {
  color: #06c;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

body.dark a {
  color: #6bf;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.25;
  margin: 2rem 0 1rem 0;
}

h1,
.post-title {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.875rem;
}
h3 {
  font-size: 1.5rem;
}

.post-meta,
.post-list .post-date {
  color: #666;
  font-size: 0.875rem;
}

.post-meta {
  margin-bottom: 2rem;
}

body.dark .post-meta,
body.dark .post-list .post-date {
  color: #aaa;
}

.post-cover {
  margin-bottom: 3rem;
}

.post-cover svg {
  width: 100%;
  height: auto;
  max-height: 350px;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  margin-bottom: 1.5rem;
}

.post-list h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.content p {
  margin-bottom: 1.5rem;
}

.content blockquote {
  border-left: 4px solid #eee;
  margin: 2rem 0;
  padding: 1rem 0 1rem 1.5rem;
  font-style: italic;
}

body.dark .content blockquote {
  border-left-color: #555;
}

.content pre {
  background-color: #f8f8f8;
  padding: 1.5rem;
  border-radius: 0.375rem;
  overflow-x: auto;
  font-size: 0.875rem;
  margin: 2rem 0;
}

body.dark .content pre {
  background-color: #1a1a1a;
}

.content code {
  background-color: #f8f8f8;
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
  font-size: 0.875em;
}

body.dark .content code {
  background-color: #1a1a1a;
}

.content.hidden-links a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, currentColor 20%, transparent);
}

.content.hidden-links a:hover {
  opacity: 0.7;
}

.meme-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(8, minmax(0, 1fr));
}

.meme-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

@media (max-width: 640px) {
  .container {
    padding: 2rem 1.5rem;
  }

  body {
    font-size: 16px;
  }

  h1,
  .post-title {
    font-size: 1.875rem;
  }
  h2 {
    font-size: 1.5rem;
  }
}