:root {
  --background-color-light: #f4f4f4;
  --text-color-light: #333;
  --header-bg-light: #fff;
  --header-text-light: #333;
  --post-bg-light: #fff;
  --box-shadow-light: 0 2px 4px rgba(0,0,0,0.1);

  --background-color-dark: #121212;
  --text-color-dark: #f4f4f4;
  --header-bg-dark: #1f1f1f;
  --header-text-dark: #f4f4f4;
  --post-bg-dark: #1f1f1f;
  --box-shadow-dark: 0 2px 4px rgba(255,255,255,0.1);
}

body {
  font-family: sans-serif;
  margin: 0;
  background-color: var(--background-color-light);
  color: var(--text-color-light);
  transition: background-color 0.3s, color 0.3s;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

body.dark-mode {
  background-color: var(--background-color-dark);
  color: var(--text-color-dark);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--header-bg-light);
  color: var(--header-text-light);
  box-shadow: var(--box-shadow-light);
  transition: background-color 0.3s, color 0.3s;
}

body.dark-mode header {
  background-color: var(--header-bg-dark);
  color: var(--header-text-dark);
  box-shadow: var(--box-shadow-dark);
}

header nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: var(--text-color-light);
}

body.dark-mode header nav a {
  color: var(--text-color-dark);
}

#theme-switcher {
  padding: 0.5rem 1rem;
  border: 1px solid var(--text-color-light);
  background-color: transparent;
  color: var(--text-color-light);
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.3s, color 0.3s;
}

body.dark-mode #theme-switcher {
  border-color: var(--text-color-dark);
  color: var(--text-color-dark);
}

#theme-switcher:hover {
  background-color: var(--text-color-light);
  color: var(--background-color-light);
}

body.dark-mode #theme-switcher:hover {
  background-color: var(--text-color-dark);
  color: var(--background-color-dark);
}

main {
  padding: 2rem;
  flex-grow: 1;
}

.post {
  background-color: var(--post-bg-light);
  margin-bottom: 2rem;
  padding: 1.5rem;
  border-radius: 5px;
  box-shadow: var(--box-shadow-light);
  transition: background-color 0.3s;
}

body.dark-mode .post {
  background-color: var(--post-bg-dark);
  box-shadow: var(--box-shadow-dark);
}

.post h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.post-title-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-color-light);
}

body.dark-mode .post-title-link {
  color: var(--text-color-dark);
}

.post-image {
  width: 50px;
  height: 50px;
  object-fit: cover;
  margin-right: 1rem;
  border-radius: 5px;
}

.post-date {
  font-size: 0.9em;
  color: #666;
  margin-bottom: 1rem;
}

body.dark-mode .post-date {
  color: #bbb;
}

.source-link {
  display: block;
  margin-top: 1rem;
  font-size: 0.9em;
  color: #666;
}

body.dark-mode .source-link {
  color: #bbb;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  background-color: var(--header-bg-light);
  color: var(--header-text-light);
  box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
  transition: background-color 0.3s, color 0.3s;
}

body.dark-mode footer {
  background-color: var(--header-bg-dark);
  color: var(--header-text-dark);
  box-shadow: 0 -2px 4px rgba(255,255,255,0.1);
}

footer nav {
  margin-top: 1rem;
}

footer nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: var(--text-color-light);
}

body.dark-mode footer nav a {
  color: var(--text-color-dark);
}