:root {
  --background: #faf9f6;
  --surface: #ffffff;
  --text: #222222;
  --muted: #666666;
  --border: #e5e5e5;
  --accent: #0d9453;
  --accent-hover: #0a7340;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Libre Baskerville', serif;
  --max-width: 720px;
  --transition-speed: 0.2s;
}

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

body {
  background-color: var(--background);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Base Styles & Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin-top: 1.8em;
  margin-bottom: 0.6em;
}

h1 {
  font-size: 2.2rem;
  margin-top: 0.5em;
  margin-bottom: 0.4em;
}

h2 {
  font-size: 1.7rem;
}

h3 {
  font-size: 1.4rem;
}

h4 {
  font-size: 1.2rem;
}

p {
  margin-bottom: 1.25em;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 4px;
  transition: text-decoration-color var(--transition-speed), color var(--transition-speed);
}

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

blockquote {
  border-left: 3px solid var(--text);
  padding-left: 20px;
  margin-left: 0;
  margin-right: 0;
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  font-style: italic;
  font-size: 1.1rem;
}

blockquote p {
  margin-bottom: 0;
}

ul, ol {
  margin-bottom: 1.5em;
  padding-left: 30px;
}

li {
  margin-bottom: 0.5em;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 3em auto;
  width: 30%;
}

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

figure {
  margin: 2em 0;
  width: 100%;
}

figure img {
  border-radius: 4px;
  margin-left: auto;
  margin-right: auto;
}

figcaption {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  margin-top: 0.75em;
  line-height: 1.4;
}

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

/* Header Styles */
.site-header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--text);
}

.site-title-link:hover {
  color: var(--accent);
}

.nav-links {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  list-style: none;
  display: flex;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--text);
}

/* Footer Styles */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  margin-top: 6rem;
  background-color: var(--surface);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.site-footer p {
  margin-bottom: 0.5rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--text);
}

/* Homepage Styles */
.hero-section {
  padding: 4rem 0 3rem 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
  background-color: var(--surface);
}

.hero-title {
  font-size: 2.8rem;
  margin: 0 0 0.5rem 0;
  font-weight: 700;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--muted);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.post-card {
  display: block;
  text-decoration: none;
  color: var(--text);
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  transition: transform var(--transition-speed);
}

.post-card:last-child {
  border-bottom: none;
}

.post-card-title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  margin: 0 0 0.4rem 0;
  transition: color var(--transition-speed);
}

.post-card:hover .post-card-title {
  color: var(--accent);
}

.post-card-subtitle {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.4;
  margin-bottom: 0.8rem;
  font-weight: 400;
}

.post-card-meta {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Post Page Styles */
.article-header {
  margin-top: 3rem;
  margin-bottom: 2.5rem;
}

.article-title {
  font-size: 2.5rem;
  margin: 0 0 0.4rem 0;
  line-height: 1.15;
}

.article-subtitle {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  color: var(--muted);
  font-weight: 400;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.article-meta {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.article-hero-image {
  margin-bottom: 2.5rem;
  border-radius: 4px;
  overflow: hidden;
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

.article-hero-image img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
}

/* Social Sharing */
.sharing-section {
  margin-top: 4rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sharing-title {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 600;
  margin: 0;
}

.sharing-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-share {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background-color: var(--surface);
  border-radius: 99px;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-speed) ease;
}

.btn-share:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: rgba(13, 148, 83, 0.03);
}

.btn-share-copy {
  background-color: var(--text);
  color: var(--surface);
  border-color: var(--text);
}

.btn-share-copy:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--surface);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #222222;
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  z-index: 1000;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* Media Queries */
@media (max-width: 768px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: 1.8rem;
  }

  .article-hero-image {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    left: auto;
    right: auto;
  }

  .article-hero-image img {
    border-radius: 0;
  }
}

/* Pagination Styling */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.pagination-links {
  display: flex;
  gap: 1rem;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background-color: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-speed) ease;
}

.pagination-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pagination-info {
  color: var(--muted);
}