/* === Design System === */
:root {
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  --color-ink: #1a1a1a;
  --color-ink-light: #555;
  --color-ink-muted: #888;
  --color-bg: #faf9f7;
  --color-bg-warm: #f5f0eb;
  --color-border: #e8e4df;
  --color-accent: #c06014;
  --color-accent-hover: #a04e0f;
  --color-tag: #6b5c4d;
  --color-tag-bg: #f0ebe5;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* === Layout === */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header === */
.site-header {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.site-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  cursor: pointer;
}

.site-title:hover {
  color: var(--color-accent);
  transition: color 200ms;
}

.site-nav {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  transition: color 200ms;
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-ink);
}

/* === Hero === */
.hero {
  padding: 80px 0 60px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-ink-light);
  line-height: 1.7;
  max-width: 540px;
}

/* === Featured Post === */
.featured-section {
  padding: 0 0 48px;
}

.featured-card {
  background: var(--color-bg-warm);
  border-radius: 12px;
  padding: 40px;
  cursor: pointer;
  transition: background 200ms;
}

.featured-card:hover {
  background: #ede7df;
}

.featured-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.featured-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.featured-excerpt {
  font-size: 1rem;
  color: var(--color-ink-light);
  line-height: 1.7;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

/* === Posts Grid === */
.posts-section {
  padding: 0 0 80px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
}

.filter-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 20px;
  background: var(--color-tag-bg);
  color: var(--color-tag);
  cursor: pointer;
  transition: all 200ms;
  border: none;
  font-family: var(--font-body);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--color-ink);
  color: #fff;
}

.posts-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-card {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background 200ms;
}

.post-card:first-child {
  border-top: 1px solid var(--color-border);
}

.post-card:hover {
  background: var(--color-bg-warm);
  margin: 0 -16px;
  padding: 28px 16px;
  border-radius: 8px;
  border-color: transparent;
}

.post-card:hover + .post-card {
  border-top-color: transparent;
}

.post-card-inner {
  display: flex;
  flex-direction: column;
}

.post-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.post-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.post-excerpt {
  font-size: 0.9375rem;
  color: var(--color-ink-light);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}

.post-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

/* === Single Post Page === */
.post-page-header {
  padding: 60px 0 40px;
  text-align: center;
}

.post-page-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 16px;
  display: inline-block;
}

.post-page-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.post-page-meta {
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  display: flex;
  justify-content: center;
  gap: 16px;
}

.post-page-feature-image {
  max-width: 900px;
  margin: 0 auto 48px;
  padding: 0 24px;
}

.post-page-feature-image img {
  width: 100%;
  border-radius: 12px;
}

.post-content {
  padding: 0 0 80px;
}

.post-content h2 {
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 600;
  margin: 48px 0 16px;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 36px 0 12px;
}

.post-content p {
  margin-bottom: 24px;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 24px;
  margin: 32px 0;
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-ink-light);
}

.post-content ul, .post-content ol {
  margin: 0 0 24px 24px;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.post-content li {
  margin-bottom: 8px;
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.post-content img {
  border-radius: 8px;
  margin: 32px 0;
}

.post-content pre {
  background: var(--color-ink);
  color: #e8e4df;
  padding: 24px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 32px 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.post-content code {
  font-size: 0.9em;
  background: var(--color-bg-warm);
  padding: 2px 6px;
  border-radius: 4px;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 48px 0;
}

.post-content figure {
  margin: 32px 0;
}

.post-content figcaption {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
  text-align: center;
  margin-top: 12px;
}

/* === Back Link === */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  margin-bottom: 20px;
  cursor: pointer;
  transition: color 200ms;
}

.back-link:hover {
  color: var(--color-ink);
}

/* === Load More === */
.load-more-container {
  text-align: center;
  padding-top: 40px;
}

.load-more-btn {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 10px 32px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  transition: all 200ms;
}

.load-more-btn:hover {
  background: var(--color-ink);
  color: #fff;
  border-color: var(--color-ink);
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 60px 0;
  color: var(--color-ink-muted);
  font-size: 1rem;
}

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.footer-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-role {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

.footer-right {
  display: flex;
  gap: 16px;
}

.footer-link {
  color: var(--color-ink-muted);
  transition: color 200ms;
  cursor: pointer;
}

.footer-link:hover {
  color: var(--color-ink);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

/* === Loading === */
.loading-placeholder {
  background: linear-gradient(90deg, var(--color-border) 25%, var(--color-bg-warm) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
  color: transparent !important;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === Responsive === */
@media (max-width: 640px) {
  .hero { padding: 48px 0 40px; }
  .hero-title br { display: none; }
  .featured-card { padding: 28px; }
  .post-card:hover { margin: 0; padding: 28px 0; border-radius: 0; background: transparent; }
  .section-header { flex-direction: column; align-items: flex-start; }
  .footer-content { flex-direction: column; gap: 20px; }
}