/* ソクメモ / SokuMemo — 公開ページ共通スタイル
   Dark Studio × Coral Orange。読み物として静かに読めることを優先する。 */

:root {
  color-scheme: dark;
  --bg: #0e1014;
  --panel: #181b22;
  --panel-2: #1d212a;
  --line: #262a34;
  --line-strong: #333947;
  --text: #f8fafc;
  --body: #cbd5e1;
  --muted: #94a3b8;
  --faint: #5b6472;
  --accent: #f97316;
  --accent-soft: rgba(249, 115, 22, 0.1);
  --accent-line: rgba(249, 115, 22, 0.38);
  --radius: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f7f8fa;
    --panel: #ffffff;
    --panel-2: #eef1f5;
    --line: #e2e8f0;
    --line-strong: #cbd5e1;
    --text: #0f172a;
    --body: #334155;
    --muted: #52627a;
    --faint: #7a8698;
    --accent: #e2620c;
    --accent-soft: rgba(249, 115, 22, 0.1);
    --accent-line: rgba(249, 115, 22, 0.4);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.95;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-line); }
a:hover { border-bottom-color: var(--accent); }
a.plain { border-bottom: 0; }

.wrap { width: 100%; max-width: 720px; margin: 0 auto; padding: 0 22px; }

/* ── header ── */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 66px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.bars { display: inline-flex; align-items: center; gap: 3px; height: 18px; }
.bars i { display: block; width: 3px; border-radius: 2px; background: var(--accent); }
.bars i:nth-child(1) { height: 6px; }
.bars i:nth-child(2) { height: 12px; }
.bars i:nth-child(3) { height: 18px; }
.bars i:nth-child(4) { height: 12px; }
.bars i:nth-child(5) { height: 6px; }
.brand strong { color: var(--text); font-size: 16px; font-weight: 700; letter-spacing: 0.01em; }
.brand span { color: var(--faint); font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase; }
.nav { display: flex; gap: 18px; font-size: 12.5px; }
.nav a { color: var(--muted); border: 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* ── hero (index) ── */
.hero { padding: 66px 0 44px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin: 0 0 18px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); display: block; }
h1 {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 34px;
  line-height: 1.35;
  letter-spacing: -0.015em;
  font-weight: 700;
}
.lede { margin: 0; font-size: 15.5px; line-height: 1.95; color: var(--body); max-width: 34em; }

.point-list { list-style: none; margin: 38px 0 0; padding: 0; border-top: 1px solid var(--line); }
.point-list li { padding: 18px 0; border-bottom: 1px solid var(--line); display: flex; gap: 14px; align-items: baseline; }
.point-list b { color: var(--text); font-weight: 600; min-width: 8.5em; font-size: 14px; }
.point-list span { color: var(--muted); font-size: 13.5px; }

.cards { display: grid; gap: 12px; margin: 40px 0 0; }
@media (min-width: 620px) { .cards { grid-template-columns: 1fr 1fr; } }
.card-link {
  display: block; padding: 20px 20px 18px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); border-bottom-width: 1px; transition: border-color 0.15s ease, background 0.15s ease;
}
.card-link:hover { border-color: var(--line-strong); background: var(--panel-2); }
.card-link b { display: block; color: var(--text); font-size: 14.5px; font-weight: 600; margin-bottom: 4px; }
.card-link span { color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* ── article ── */
main.doc { padding: 48px 0 20px; }
.doc-head { padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
.doc-head h1 { font-size: 27px; margin-bottom: 10px; }
.doc-head .dates { color: var(--faint); font-size: 12px; margin: 0; }

.doc h2 {
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
  margin: 38px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  line-height: 1.6;
}
.doc h3 { color: var(--text); font-size: 14px; font-weight: 600; margin: 24px 0 8px; }
.doc p { margin: 0 0 14px; font-size: 14px; }
.doc ul, .doc ol { margin: 0 0 16px; padding-left: 1.35em; }
.doc li { margin-bottom: 8px; font-size: 14px; }
.doc li::marker { color: var(--faint); }
.doc strong { color: var(--text); font-weight: 600; }

.table { width: 100%; border-collapse: collapse; margin: 6px 0 20px; font-size: 13.5px; }
.table th, .table td { text-align: left; vertical-align: top; padding: 12px 14px; border: 1px solid var(--line); }
.table th { width: 9.5em; color: var(--muted); font-weight: 600; background: var(--panel); white-space: nowrap; }
.table td { color: var(--body); }

.callout {
  margin: 22px 0; padding: 16px 18px; border-radius: 14px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  font-size: 13px; line-height: 1.9; color: var(--body);
}
.callout b { color: var(--text); }

.faq { border-top: 1px solid var(--line); margin-top: 10px; }
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 26px 16px 0; position: relative;
  color: var(--text); font-size: 14px; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 15px; color: var(--accent);
  font-size: 17px; font-weight: 400; line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 0 18px; color: var(--muted); font-size: 13.5px; }
.faq .answer p { margin: 0 0 10px; font-size: 13.5px; }

.contact {
  margin: 34px 0 0; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
}
.contact h2 { border: 0; padding: 0; margin: 0 0 10px; font-size: 15px; }
.contact p { margin: 0 0 6px; font-size: 13px; color: var(--muted); }
.contact .mail { font-size: 15px; font-weight: 600; color: var(--text); border-bottom-color: var(--accent-line); }

/* ── footer ── */
.site-footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 26px 0 40px; }
.site-footer .wrap { display: block; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12px; margin-bottom: 14px; }
.foot-links a { color: var(--muted); border: 0; }
.foot-links a:hover { color: var(--text); }
.operator { font-size: 11.5px; line-height: 1.9; color: var(--faint); margin: 0; }
.operator b { color: var(--muted); font-weight: 600; }

@media (max-width: 520px) {
  h1 { font-size: 28px; }
  .doc-head h1 { font-size: 23px; }
  .nav { gap: 12px; font-size: 11.5px; }
  .point-list li { display: block; }
  .point-list b { display: block; margin-bottom: 2px; }
  .table th { width: 7.5em; }
  .brand span { display: none; }
}