/* わしの日々 — sizu.me 風の静かな基準線から。オリジナリティは後で漆を塗る */

:root {
  --text: #37352f;
  --text-sub: #9b9a97;
  --bg: #ffffff;
  --link: #0f7b6c;
  --border: #eeeeec;
  --max-width: 640px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 20px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 0 8px;
  font-size: 14px;
}
.site-header a { color: var(--text-sub); text-decoration: none; letter-spacing: 0.05em; }
.site-header a:hover { color: var(--text); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 0 64px;
}

/* --- 一覧 --- */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.post-list time { color: var(--text-sub); font-size: 13px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.post-list a { color: var(--text); text-decoration: none; }
.post-list a:hover { color: var(--link); }

/* --- 記事 --- */
.post-date { color: var(--text-sub); font-size: 13px; margin: 0 0 4px; }
.post-title { font-size: 24px; line-height: 1.5; margin: 0 0 32px; }

.post-body h1, .post-body h2 { font-size: 20px; margin: 2.2em 0 0.6em; line-height: 1.5; }
.post-body h3 { font-size: 17px; margin: 2em 0 0.5em; }
.post-body p { margin: 1.1em 0; }
.post-body a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; word-break: break-all; }
.post-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 1.5em auto;
}
.post-body hr { border: none; border-top: 1px solid var(--border); margin: 2.5em 0; }
.post-body blockquote {
  margin: 1.2em 0;
  padding: 0 1.2em;
  border-left: 3px solid var(--border);
  color: var(--text-sub);
}
.post-body pre {
  background: #f7f6f3;
  padding: 14px 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}
.post-body code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; }
.post-body p > code { background: #f7f6f3; padding: 1px 5px; border-radius: 4px; }
.post-body iframe { max-width: 100%; }

/* --- 文箱📮 --- */
.letter {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.letter-title { font-size: 15px; margin: 0 0 4px; }
.letter-note { color: var(--text-sub); font-size: 12.5px; margin: 0 0 12px; }
.letter-form textarea {
  width: 100%;
  min-height: 88px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.7;
  resize: vertical;
}
.letter-form textarea:focus { outline: none; border-color: var(--link); }
.letter-form button {
  margin-top: 8px;
  padding: 7px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  cursor: pointer;
}
.letter-form button:hover { border-color: var(--link); color: var(--link); }
.letter-form button:disabled { color: var(--text-sub); cursor: default; }
.letter-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.letter-thanks { color: var(--text-sub); font-size: 14px; }

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 0 48px;
  border-top: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 13px;
}
.site-footer a { color: var(--text-sub); }

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e6e4;
    --text-sub: #8a8a88;
    --bg: #191919;
    --link: #5db8a8;
    --border: #2e2e2c;
  }
  .post-body pre, .post-body p > code { background: #242422; }
}