*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #fff;
  --text: #333;
  --muted: #666;
  --link: #888;
  --link-hover: #000;
  --border: #eee;
  --code-bg: #f5f5f5;
  --font:
    Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono: "Bitstream Vera Sans Mono", "Courier New", monospace;
}

[data-theme="dark"] {
  --bg: #1a1a1a;
  --text: #e0e0e0;
  --muted: #999;
  --link-hover: #fff;
  --border: #333;
  --code-bg: #2a2a2a;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font: 18px/1.4 var(--font);
  color: var(--text);
  background: var(--bg);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: 2rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
}

ul,
ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.25rem;
}

blockquote {
  border-left: 2px solid var(--muted);
  padding-left: 1em;
  margin: 1.5rem 0;
  font-style: italic;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre {
  font-family: var(--mono);
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: 3px 3px rgba(0, 0, 0, 0.1);
}

pre code {
  background: none;
  padding: 0;
}

img {
  max-width: 100%;
  height: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

small,
time {
  font-size: 15px;
  color: var(--muted);
}

/* Layout */
.wrapper-masthead {
  margin: 0 2rem 3rem;
}

.masthead {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-info {
  display: flex;
  flex-direction: column;
  margin-left: 2rem;
}

.site-info h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 300;
  letter-spacing: 1px;
}

.site-description {
  margin: -0.25rem 0 0 0;
  color: var(--muted);
  font-size: 1rem;
}

header nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 18px;
}

footer {
  margin-top: 4rem;
  text-align: center;
}

article {
  margin-bottom: 2rem;
}

.theme-toggle {
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: block;
}

.theme-toggle:hover {
  color: var(--link-hover);
}

.giscus-container {
  margin-top: 3rem;
}

@media (max-width: 640px) {
  .masthead {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  header nav {
    gap: 0.75rem;
  }
}