:root {
  --accent: #78795b;
  --ink: #15171a;
  --ink-soft: #4a4d52;
  --border: #e5e5e0;
  --bg: #fdfdfb;
  --card-bg: #ffffff;
  --max-width: 1200px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* header */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
}
.site-nav a {
  color: var(--ink-soft);
  margin-left: 24px;
  font-size: 0.95rem;
}
.site-nav a:first-child { margin-left: 0; }
.site-nav a:hover { color: var(--accent); }

/* intro */
.site-intro {
  padding: 56px 0 32px;
  text-align: center;
}
.site-intro h1 {
  font-size: 2.4rem;
  margin: 0 0 8px;
}
.site-description {
  color: var(--ink-soft);
  font-size: 1.15rem;
  margin: 0;
}

/* post feed / cards */
.post-feed {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 32px;
  padding: 24px 0 64px;
}
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.post-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.post-card-image-link { display: block; }
.post-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.post-card-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.post-card-title {
  font-size: 1.2rem;
  margin: 0;
  line-height: 1.3;
}
.post-card-title a { color: var(--ink); }
.post-card-title a:hover { color: var(--accent); text-decoration: none; }
.post-card-excerpt {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
  flex: 1;
}
.post-card-meta {
  color: #8b8d85;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* full post / page */
.post-full {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 0 80px;
}
.post-full-header { margin-bottom: 32px; }
.post-full-title {
  font-size: 2.2rem;
  line-height: 1.2;
  margin: 0 0 12px;
}
.post-full-meta {
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.post-full-content { font-size: 1.08rem; }
.post-full-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 8px 0 24px;
}
.post-full-content h2 { font-size: 1.5rem; margin-top: 40px; }
.post-full-content h3 { font-size: 1.25rem; margin-top: 32px; }
.post-full-content blockquote {
  margin: 24px 0;
  padding: 4px 20px;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
}
.post-full-content a { color: var(--accent); text-decoration: underline; }
.back-link { margin-top: 48px; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 40px;
}
.site-footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .site-header-inner { flex-direction: column; align-items: flex-start; }
  .site-nav a { margin-left: 0; margin-right: 20px; }
  .site-intro { padding: 40px 0 24px; }
  .site-intro h1 { font-size: 1.9rem; }
  .post-full-title { font-size: 1.7rem; }
}