/* Minimal 2-column responsive layout (PC: 2 columns, Mobile: 1 column) */

:root {
  --max: 1100px;
  --border: rgba(0,0,0,0.10);
  --text: #111;
  --muted: #666;
  --bg: #fff;
  --card: #fbfbfd;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  z-index: 20;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
}
.brand a { font-weight: 800; letter-spacing: 0.02em; }
.search { flex: 1; display: flex; gap: 8px; }
.search input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.search button {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}
.nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 22px;
  padding: 18px 0 40px;
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
}

.page-title { margin: 0 0 16px; }

.meta {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 6px 0 0;
}

.post-list { display: grid; gap: 14px; }
.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 14px;
  padding: 14px 16px;
}
.card-title { margin: 0 0 6px; font-size: 1.2rem; }
.excerpt { margin: 10px 0 0; color: #333; }

.article-title { margin: 0 0 8px; font-size: 1.8rem; }
.article-body { margin-top: 14px; }
.article-body img { max-width: 100%; height: auto; }
.article-body pre { overflow-x: auto; padding: 12px; border-radius: 10px; background: #0c0c0f; color: #fff; }

.sidebar .sidebox {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: #fff;
  margin-bottom: 14px;
}
.sidebox-title { font-weight: 800; margin-bottom: 10px; }
.list { margin: 0; padding-left: 18px; }
.list li { margin: 8px 0; color: #333; }

.pager { margin-top: 18px; }
.btn {
  display: inline-block;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color: var(--muted);
}
.footer-small { font-size: 0.92rem; }