:root {
  color-scheme: light;
  --surface-1: #fcfcfb; --surface-2: #f4f3f0; --surface-3: #ebe9e4;
  --border: #dedcd6; --border-strong: #cdc9c0;
  --text-primary: #0b0b0b; --text-secondary: #52514e; --text-muted: #7a7873;
  --sun-100: #fdeee4; --sun-600: #eb6834; --sun-700: #d4501f; --sun-800: #a83c15;
  --shade: #3f4a5a;
  --ok: #1baf7a;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --surface-1: #1a1a19; --surface-2: #242422; --surface-3: #2d2d29;
    --border: #3a3a36; --border-strong: #4a4a44;
    --text-primary: #ffffff; --text-secondary: #c3c2b7; --text-muted: #8f8d84;
    --sun-100: #3a1a0c; --sun-600: #d95926; --sun-700: #e5793f; --sun-800: #f0a071;
    --shade: #9fb0c6;
    --ok: #199e70;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--surface-1); color: var(--text-primary);
  font-size: 15px; line-height: 1.85;
}
.wrap { max-width: 780px; margin: 0 auto; padding: 40px 22px 90px; }

h1 { font-size: 27px; line-height: 1.35; margin: 0 0 12px; letter-spacing: -.01em; text-wrap: balance; }
.lede { color: var(--text-secondary); margin: 0 0 34px; }
h2 {
  font-size: 19px; margin: 46px 0 12px; padding-top: 22px;
  border-top: 1px solid var(--border); text-wrap: balance;
}
h3 { font-size: 15px; margin: 26px 0 8px; }
p, ul, ol { margin: 0 0 15px; }
ul, ol { padding-left: 1.3em; }
li { margin-bottom: 6px; }
li::marker { color: var(--text-muted); }
a { color: var(--sun-700); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .87em; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px;
}
pre {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px; overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px; line-height: 1.75; margin: 0 0 18px;
}
pre code { background: none; border: 0; padding: 0; font-size: inherit; }
pre .c { color: var(--text-muted); }

.tablewrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; margin: 0 0 20px; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 9px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--surface-2); font-size: 11.5px; letter-spacing: .04em; color: var(--text-secondary); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

.note {
  border: 1px solid var(--border); border-left: 3px solid var(--sun-600);
  border-radius: 0 8px 8px 0; background: var(--surface-2);
  padding: 15px 18px; margin: 0 0 20px; font-size: 14px;
}
.note strong { display: block; margin-bottom: 5px; }
.note.warn { border-left-color: var(--shade); }

footer {
  border-top: 1px solid var(--border); margin-top: 60px; padding: 18px 22px;
  font-size: 11.5px; color: var(--text-muted); line-height: 1.8;
}
footer a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--sun-600); outline-offset: 2px;
}

/* ── コラム ─────────────────────────────────────── */
article p { margin: 0 0 16px; }
.conditions {
  margin-top: 52px; padding-top: 26px; border-top: 2px solid var(--border-strong);
}
.conditions h2 { border-top: 0; padding-top: 0; margin-top: 0; font-size: 16px; }
.conditions th { white-space: nowrap; width: 34%; color: var(--text-secondary); font-weight: 600; }
.cta {
  margin: 22px 0 0; padding: 15px 18px; border-radius: 9px;
  background: var(--sun-100); border: 1px solid var(--sun-600); font-size: 14px;
}
.cta a { font-weight: 600; }

/* ── コラム一覧 ──────────────────────────────────── */
.colist { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 14px; }
.colist li {
  border: 1px solid var(--border); border-radius: 9px; padding: 14px 16px;
  background: var(--surface-1);
}
.colist li > a { font-size: 15px; font-weight: 600; text-decoration: none; display: block; }
.colist li > a:hover { text-decoration: underline; }
.colist .m {
  display: block; font-size: 11px; color: var(--text-muted);
  margin: 3px 0 6px; letter-spacing: .02em;
}
.colist .d { display: block; font-size: 12.5px; color: var(--text-secondary); line-height: 1.75; }