@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Serif:wght@600&display=swap");
:root {
  --bg: #f2f5f3;
  --panel: rgba(255,255,255,0.72);
  --ink: #14201c;
  --muted: #5a6b63;
  --line: #d5dfd9;
  --accent: #0b6e4f;
  --link: #0b6e4f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 85% -10%, #cfe8dc 0%, transparent 60%),
    linear-gradient(180deg, #e7eee9 0%, var(--bg) 40%, #e9efeb 100%);
  line-height: 1.55;
}
.top {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}
.brand {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}
.tag { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.95rem; }
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 4rem;
}
main > :is(h1, .prose, .brief-list, p) {
  background: var(--panel);
  backdrop-filter: blur(8px);
}
main > h1, main > p.bet {
  padding: 1rem 1.1rem 0;
  margin: 0;
  border-radius: 12px 12px 0 0;
}
main > ul.brief-list {
  margin: 0;
  padding: 0.5rem 1.1rem 1rem;
  border-radius: 0 0 12px 12px;
}
article.prose {
  display: block;
  padding: 1.25rem 1.1rem 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}
footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; }
h1 { font-family: "IBM Plex Serif", Georgia, serif; font-size: 1.7rem; margin: 0 0 1rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.05rem; }
p { margin: 0.65rem 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
a { color: var(--link); }
ul, ol { padding-left: 1.2rem; }
.brief-list { list-style: none; border: 1px solid var(--line); border-top: 0; }
.brief-list li {
  border-top: 1px solid var(--line);
  padding: 1rem 0;
}
.brief-list a.date {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--accent);
}
.bet { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.95rem; }
.back { display: inline-block; margin: 0 0 1rem; color: var(--muted); font-size: 0.9rem; }
.prose :is(h1,h2,h3):first-child { margin-top: 0; }