:root {
  --bg: #f3f0e8;
  --paper: #fffdf7;
  --ink: #263238;
  --muted: #66736f;
  --line: #b7c7c1;
  --accent: #245f68;
  --accent-soft: #dcebea;
  --max-width: 780px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(rgba(255,255,255,.35), rgba(255,255,255,.35)),
    repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(36,95,104,.05) 28px),
    var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.9;
}
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
.site-header, main, .site-footer {
  width: min(calc(100% - 32px), var(--max-width));
  margin-inline: auto;
}
.site-header { padding: 42px 0 20px; }
.site-title {
  margin: 0;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 8vw, 3.3rem);
  font-weight: 500;
  letter-spacing: .05em;
}
.site-subtitle { margin: 4px 0 22px; color: var(--muted); font-size: .95rem; }
nav { display: flex; flex-wrap: wrap; gap: 8px; }
nav a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  text-decoration: none;
}
nav a[aria-current="page"] { background: var(--accent); border-color: var(--accent); color: white; }
main { min-height: 60vh; }
.panel, .entry {
  margin: 0 0 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,253,247,.93);
  box-shadow: 0 4px 20px rgba(50,65,65,.05);
}
h1, h2, h3 { line-height: 1.45; }
h2 {
  margin-top: 0;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 500;
}
.entry time { display: block; color: var(--muted); font-size: .9rem; }
.tags { margin-top: 12px; color: var(--muted); font-size: .85rem; }
.note { padding: 12px 16px; border-left: 4px solid var(--accent); background: var(--accent-soft); }
.link-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.link-card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  text-decoration: none;
}
.link-card strong { display: block; margin-bottom: 5px; }
.link-card span, .small { color: var(--muted); font-size: .9rem; }
.site-footer { padding: 18px 0 42px; color: var(--muted); font-size: .8rem; }
@media (max-width: 520px) {
  .site-header { padding-top: 28px; }
  .panel, .entry { padding: 18px; border-radius: 10px; }
  nav { gap: 6px; }
  nav a { padding: 5px 10px; font-size: .9rem; }
}