/* Global variables */
:root {
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --bg-color: #ffffff;
  --header-bg-color: #f2f2f2;
  --text-color: #333333;
  --link-color: #333333;
  --meta-color: #999999;
  --accent-color: #FC4D50;
  --container-width: 860px;
  --spacing-unit: 1.5rem;
}

/* Reset & Basics */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.8;
  font-size: 16px;
  margin: 0;
  padding: 0;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background-color: var(--header-bg-color);
  padding: 3rem 0;
  margin-bottom: 3rem;
  border-bottom: 1px solid #eaeaea;
  /* Optional subtle border */
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.site-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #000;
  display: block;
  margin-bottom: 0;
}

nav a {
  margin-left: 20px;
  margin-right: 0;
  font-size: 1.1rem;
  font-weight: 500;
  color: #666;
  transition: color 0.2s ease;
}

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

/* Post List (Homepage) */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  margin-bottom: 2rem;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--meta-color);
  display: block;
  margin-bottom: 0.2rem;
}

.post-link {
  font-size: 1.4rem;
  font-weight: 700;
  display: block;
  line-height: 1.3;
}

/* Post Content (Single Page) */
.post-header {
  margin-bottom: 2rem;
  text-align: left;
}

.post-title {
  font-size: 2rem;
  margin-bottom: 0.2rem;
  line-height: 1.2;
}

.post-content {
  margin-bottom: 4rem;
}

.post-content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.post-content h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
}

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

.post-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 2rem auto;
  border-radius: 4px;
}

.post-content a {
  color: var(--link-color);
  border-bottom: 1px solid #ccc;
  padding-bottom: 1px;
}

.post-content a:hover {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.post-content blockquote {
  border-left: 4px solid #eee;
  padding-left: 1rem;
  margin-left: 0;
  color: var(--meta-color);
  font-style: italic;
}

/* Footer */
footer {
  padding: 2rem 0;
  margin-top: 4rem;
  border-top: 1px solid #eee;
  text-align: center;
  font-size: 0.85rem;
  color: var(--meta-color);
}