/* 使い方ページ（PRONUN+ 1.83 の guide を LS Speaking 用に）。色はアプリ本体（public/student/index.html の :root）と同じ緑系 */
@font-face { font-family: "Bricolage Grotesque"; src: url("/fonts/BricolageGrotesque-latin.woff2") format("woff2"); font-weight: 600 800; font-display: swap; }
:root {
  --blue: #4D7C0F; --blue-dark: #2D3F01; --blue-light: #F4FADF; --blue-line: #D3EC9B;
  --page: #FAFAF0; --surface: #FFFFFF; --text: #0F172A; --sub: #64748B; --faint: #94A3B8; --border: #E2E8F0;
  --amber: #B45309; --amber-light: #FFFBEB;
  --ui: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Segoe UI", Roboto, sans-serif;
  --display: "Bricolage Grotesque", -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--text); font-family: var(--ui); font-size: 15px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
a { color: var(--blue); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* 1.90：上の帯はスクロールしても上に残す（篠澤さん）。目次と章の見出しは帯の高さ（--top）だけ下げる */
:root { --top: 64px; }
.g-top { background: var(--blue-dark); color: #fff; position: sticky; top: 0; z-index: 10; box-shadow: 0 1px 0 rgba(15,23,42,.12); }
.g-top .in { max-width: 1040px; margin: 0 auto; padding: 14px 16px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.g-brand { display: inline-flex; align-items: center; gap: 8px; font-family: var(--display); font-weight: 800; letter-spacing: .01em; color: #fff; text-decoration: none; }
.g-brand img { width: 28px; height: 28px; border-radius: 7px; background: #FAFAF0; }
.g-brand span { color: #8ECF02; }
.g-top .sp { flex: 1; }
.g-top a.back { color: #fff; font-size: 13px; font-weight: 700; border: 1px solid rgba(255,255,255,.5); border-radius: 8px; padding: 6px 12px; text-decoration: none; }

.g-wrap { max-width: 1040px; margin: 0 auto; padding: 24px 16px 64px; display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 32px; align-items: start; }
.g-toc { position: sticky; top: calc(var(--top) + 16px); font-size: 13.5px; max-height: calc(100vh - var(--top) - 32px); overflow-y: auto; }
.g-toc b { display: block; font-size: 11.5px; color: var(--sub); letter-spacing: .08em; margin: 0 0 6px; }
.g-toc ol { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 2px; }
.g-toc a { display: block; padding: 5px 10px; border-radius: 8px; color: var(--text); text-decoration: none; line-height: 1.5; }
.g-toc a:hover { background: var(--blue-light); color: var(--blue); }

.g-head h1 { font-size: 26px; margin: 0 0 8px; text-wrap: balance; }
.g-head p { color: var(--sub); margin: 0 0 16px; max-width: 62ch; }
.g-actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 28px; }
.g-btn { display: inline-flex; align-items: center; gap: 8px; font: inherit; font-size: 14px; font-weight: 700; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; text-decoration: none; min-height: 44px; }
.g-btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }

.g-part { font-size: 12px; font-weight: 800; letter-spacing: .12em; color: var(--blue); margin: 40px 0 12px; padding-top: 20px; border-top: 2px solid var(--blue-line); }
.g-sec { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px 22px 18px; margin: 0 0 18px; scroll-margin-top: calc(var(--top) + 16px); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 24px; }
.g-sec h2 { grid-column: 1 / -1; font-size: 19px; margin: 0; display: flex; gap: 10px; align-items: baseline; text-wrap: balance; }
.g-sec h2 .n { font-family: var(--display); color: var(--blue); font-size: 15px; font-variant-numeric: tabular-nums; }
.g-sec .lead { grid-column: 1 / -1; color: var(--sub); margin: 0 0 4px; }
.g-sec ol.steps { margin: 4px 0 0; padding-left: 1.4em; display: grid; gap: 8px; max-width: 62ch; }
.g-sec .note { background: var(--amber-light); color: var(--amber); border-radius: 8px; padding: 8px 12px; font-size: 13.5px; margin: 12px 0 0; max-width: 62ch; }
.g-shot { margin: 0; align-self: start; }
.g-shot img { display: block; height: auto; border: 1px solid var(--border); border-radius: 10px; background: var(--page); }
.g-shot.phone img { width: 220px; }
.g-shot.pc { grid-column: 1 / -1; }
.g-shot.pc img { width: 100%; max-width: 760px; }
/* 4.02：1つの章に何枚か（手順の下に横並び・下に説明） */
.g-shots { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 16px 20px; margin-top: 10px; }
.g-shots .g-shot.phone img { width: 200px; }
.g-shots figcaption { font-size: 12.5px; color: var(--sub); margin-top: 6px; max-width: 200px; line-height: 1.5; }

/* LS：ページの下の「もう一方の使い方へ」 */
.g-other { display: block; background: var(--blue-light); border: 1px solid var(--blue-line); border-radius: 12px; padding: 16px 20px; margin: 28px 0 0; color: var(--text); text-decoration: none; }
.g-other b { display: block; color: var(--blue-dark); margin-bottom: 2px; }
.g-other span { color: var(--sub); font-size: 14px; }
.g-sec table.diff { grid-column: 1 / -1; border-collapse: collapse; width: 100%; font-size: 14px; margin-top: 6px; }
.g-sec table.diff th, .g-sec table.diff td { border-top: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; line-height: 1.6; }
.g-sec table.diff thead th { border-top: 0; font-size: 12px; color: var(--sub); font-weight: 700; }
.g-sec table.diff tbody th { font-weight: 700; white-space: nowrap; }

/* 1.85 よくある質問 */
.g-faq { margin: 40px 0 0; padding-top: 20px; border-top: 2px solid var(--blue-line); scroll-margin-top: calc(var(--top) + 16px); }
.g-faq h2 { font-size: 19px; margin: 0 0 12px; }
.g-q { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin: 0 0 10px; }
.g-q summary { cursor: pointer; padding: 14px 18px; font-weight: 700; list-style: none; display: flex; gap: 10px; }
.g-q summary::before { content: "Q"; font-family: var(--display); color: var(--blue); }
.g-q summary::-webkit-details-marker { display: none; }
.g-q[open] summary { border-bottom: 1px solid var(--border); }
.g-a { padding: 12px 18px 16px 42px; max-width: 70ch; }

@media (max-width: 760px) {
  .g-wrap { grid-template-columns: 1fr; gap: 12px; padding-top: 16px; }
  :root { --top: 56px; }
  .g-top .in { padding: 10px 16px; flex-wrap: nowrap; }
  .g-top .in > span:nth-child(2) { display: none; }   /* 狭い画面では帯を1行に保つ（ページ名は下の見出しにある） */
  .g-toc { position: static; max-height: none; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
  .g-sec { grid-template-columns: 1fr; padding: 18px 16px 14px; }
  .g-shot.phone img { width: 100%; max-width: 300px; }
  .g-shots { gap: 14px; }
  .g-shots .g-shot { flex: 0 1 calc(50% - 7px); }   /* 2列。3枚目も同じ大きさ */
  .g-shots .g-shot.phone img { width: 100%; }
  .g-shots figcaption { max-width: none; }
}
@media print {
  body { background: #fff; font-size: 11pt; }
  .g-top, .g-toc, .g-actions { display: none !important; }
  .g-wrap { display: block; padding: 0; max-width: none; }
  .g-sec { break-inside: avoid; border: 0; border-top: 1px solid #ccc; border-radius: 0; padding: 12pt 0; }
  .g-shot.phone img { width: 160px; }
  .g-shots .g-shot.phone img { width: 150px; }
  .g-shot.pc img { max-width: 100%; }
  .g-part, .g-faq { break-before: page; }
  .g-q { border: 0; }
}