/* =================================================================
 * NetChai Original Text — Elementary (Primary Course)
 * Design: F12 — Vintage Blue + Coral (雑誌風モダンエディトリアル)
 * Shared stylesheet for all lessons.
 * ================================================================= */

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:#dde2ea;min-height:100vh;-webkit-font-smoothing:antialiased}
ruby rt{font-weight:500;letter-spacing:.04em}

/* ── F12 ヴィンテージブルー＋コーラル ── */
.page{
  --F-ink:#0e2f4a;
  --F-paper:#f6f1e6;
  --F-magenta:#c45f55;
  --F-mute:#5a6a78;
  --F-rule:#cfd6dd;
  --F-card:#ffffff;
  --F-japanese:#1e3f5a;
  font-family:"Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN W3",Meiryo,sans-serif;
  color:var(--F-ink);background:var(--F-paper);
  max-width:880px;margin:32px auto;
  box-shadow:0 14px 40px rgba(20,30,55,.18);border-radius:6px;overflow:hidden;
  letter-spacing:.01em;
}

/* ── ヘッダー ── */
.f-head{
  display:grid;grid-template-columns:1fr 1fr;padding:40px 44px 24px;
  border-bottom:2px solid var(--F-ink);gap:24px;
}
.f-head .left .kicker{font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;font-size:16px;letter-spacing:.25em;color:var(--F-magenta);font-weight:800;text-transform:uppercase}
.f-head .left h1{margin:12px 0 0;font-size:52px;font-weight:900;letter-spacing:.05em;line-height:1}
.f-head .right{align-self:end;text-align:right;color:var(--F-mute);font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;font-size:15.5px;letter-spacing:.12em;line-height:1.9;font-weight:600}
.f-head .right .vol{display:block;font-weight:900;color:var(--F-ink);font-size:26px;letter-spacing:.03em;margin-bottom:6px}

.f-body{padding:14px 44px 36px}

/* ── 大見出し ── */
h2.f-h{
  margin:36px 0 18px;display:flex;align-items:baseline;gap:14px;
  border-bottom:1px solid var(--F-ink);padding-bottom:8px;
}
h2.f-h .num{font-family:"Inter",sans-serif;font-weight:900;font-size:46px;line-height:1;color:var(--F-magenta)}
h2.f-h .t{font-size:20px;font-weight:900;letter-spacing:.1em}
h2.f-h .en{margin-left:auto;font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;font-size:20px;letter-spacing:.18em;color:var(--F-mute);text-transform:uppercase;font-weight:800}

/* ── 01 新しい単語 ── */
.f-tbl{column-count:2;column-gap:30px;margin-top:6px}
.f-tbl .w{break-inside:avoid;display:grid;grid-template-columns:26px 1fr;gap:10px;padding:9px 0;border-bottom:1px solid var(--F-rule)}
.f-tbl .w .n{font-family:"Inter",sans-serif;font-weight:900;color:var(--F-magenta);font-size:15px;padding-top:6px;font-variant-numeric:tabular-nums}
.f-tbl .w .body .h{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.f-tbl .w .body .han{font-size:25px;font-weight:900}
.f-tbl .w .body .pos{font-size:14.5px;color:var(--F-mute);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic UI",Meiryo,sans-serif;letter-spacing:.02em;font-weight:600}
.f-tbl .w .body .pinyin{font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;color:var(--F-magenta);font-size:22px;font-weight:400;display:block;margin-top:0;letter-spacing:.01em}
.f-tbl .w .body .ja{font-size:18px;color:var(--F-japanese);margin-top:5px;line-height:1.7}

/* ── 02 固有名詞 ── */
.f-pn{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 30px;margin-top:8px}
.f-pn .item{display:grid;grid-template-columns:26px 1fr;gap:10px;padding:10px 0;border-bottom:1px solid var(--F-rule)}
.f-pn .item .n{font-family:"Inter",sans-serif;font-weight:900;color:var(--F-magenta);font-size:15px;padding-top:6px}
.f-pn .item .han{font-size:25px;font-weight:900}
.f-pn .item .pinyin{font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;color:var(--F-magenta);font-size:22px;font-weight:400;display:block;margin-top:0;letter-spacing:.01em}
.f-pn .item .meaning{font-size:18px;color:var(--F-japanese);margin-top:6px;line-height:1.75}
.f-pn .item .meaning .desc{display:block;color:var(--F-mute);font-size:15.5px;margin-bottom:3px;font-style:italic}

/* ── 03 重要文型 ── */
.f-ex{display:grid;gap:4px;margin-top:6px}
.f-ex .item{display:grid;grid-template-columns:30px 1fr 1fr;gap:18px;border-bottom:1px solid var(--F-rule);padding:14px 0;align-items:center}
.f-ex .item .n{font-family:"Inter",sans-serif;font-weight:900;color:var(--F-magenta);font-size:13px;padding-top:6px;font-variant-numeric:tabular-nums}
.f-ex .item .zh{font-size:27px;font-weight:700;letter-spacing:.03em;line-height:2}
.f-ex .item .zh ruby rt{color:var(--F-magenta);font-size:18px;font-weight:400;font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;letter-spacing:.01em}
.f-ex .item .ja{align-self:center;font-size:22px;color:var(--F-japanese);padding-left:12px;border-left:3px solid var(--F-magenta);line-height:1.75}

/* ── 04 本文 ── */
.f-dia{background:var(--F-card);border:2px solid var(--F-ink);padding:8px 22px 16px;margin-bottom:14px}
.f-dia .scene-no{
  display:inline-block;font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;font-weight:900;font-size:17px;
  letter-spacing:.25em;background:var(--F-ink);color:#fff;padding:8px 20px;margin:-2px 0 18px -30px;
  position:relative;left:8px;
}
.f-dia .turn{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:14px 0;border-bottom:1px dashed var(--F-rule)}
.f-dia .turn:last-child{border-bottom:0}
.f-dia .turn .who{font-family:"Source Sans 3","Inter","Segoe UI",sans-serif;font-weight:400;font-size:21px;letter-spacing:.03em;color:var(--F-magenta);padding-top:10px}
.f-dia .turn .who .ja{display:block;font-family:"Hiragino Kaku Gothic ProN",sans-serif;font-size:18px;color:var(--F-ink);font-weight:800;letter-spacing:.04em;margin-top:4px}
.f-dia .turn .zh{font-size:24px;font-weight:700;line-height:2;color:var(--F-ink)}
.f-dia .turn .zh ruby rt{color:var(--F-magenta);font-size:18px;font-weight:400;font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;letter-spacing:.01em}

/* ── 05 文法 ── */
.f-gr-card{
  background:var(--F-card);color:var(--F-ink);padding:20px 24px;margin-top:14px;
  display:grid;grid-template-columns:auto 1fr;gap:20px;
  border:1px solid var(--F-rule);border-left:6px solid var(--F-magenta);
}
.f-gr-card .tag{
  background:var(--F-magenta);color:#fff;font-weight:900;font-size:11px;
  letter-spacing:.25em;padding:8px 12px;align-self:start;height:fit-content;
}
.f-gr-card h3{margin:0 0 10px;font-size:18px;font-weight:900;letter-spacing:.04em;color:var(--F-ink)}
.f-gr-card p{margin:0 0 6px;font-size:17px;line-height:1.95;color:var(--F-japanese)}
.f-gr-card p ruby{font-size:24px;font-weight:700;color:var(--F-ink)}
.f-gr-card p ruby rt{color:var(--F-magenta);font-size:15px;font-weight:400;font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;letter-spacing:.01em}
.f-gr-card .note{color:var(--F-magenta);font-size:16px;font-style:italic;margin-top:12px;font-weight:700}
.f-gr-card .examples{margin:14px 0 0;padding-left:42px;list-style:none}
.f-gr-card .examples li{
  position:relative;font-size:27px;padding:12px 0;line-height:1.95;color:var(--F-ink);font-weight:700;
}
.f-gr-card .examples li::before{
  content:attr(data-no);position:absolute;left:-38px;top:10px;color:var(--F-magenta);
  font-family:"Hiragino Kaku Gothic ProN","Yu Gothic UI",Meiryo,sans-serif;font-weight:900;font-size:27px;
}
.f-gr-card .examples li ruby rt{color:var(--F-magenta);font-size:17px;font-weight:400;font-family:"Source Sans 3","Source Sans Pro","Inter","Segoe UI","Helvetica Neue",Arial,sans-serif;letter-spacing:.01em}

/* ── 06 本文訳文 ── */
.f-tr-block{margin:18px 0 22px;padding:0 0 4px;border-bottom:1px dotted var(--F-rule)}
.f-tr-block:last-child{border-bottom:0}
.f-tr-block h4{
  margin:0 0 10px;font-family:"Playfair Display","Times New Roman",serif;
  font-style:italic;color:var(--F-magenta);font-size:24px;font-weight:700;letter-spacing:.05em;
}
.f-tr-block .line{display:grid;grid-template-columns:100px 1fr;gap:14px;padding:8px 0;font-size:17.5px;line-height:1.85}
.f-tr-block .line .who{color:var(--F-magenta);font-weight:700;letter-spacing:.05em}
.f-tr-block .line .text{color:var(--F-japanese)}

/* ── フッター ── */
.f-foot{
  padding:22px 44px;border-top:2px solid var(--F-ink);background:var(--F-paper);
  font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;font-size:15px;color:var(--F-mute);
  display:flex;justify-content:space-between;letter-spacing:.1em;font-weight:600;
}
.f-foot strong{color:var(--F-ink);letter-spacing:.04em;font-weight:900}

/* ── 印刷用 ── */
@media print{
  body{background:#fff}
  .page{margin:0;box-shadow:none;border-radius:0;max-width:none;width:100%}
  h2.f-h{page-break-after:avoid}
  .f-tr-block,.f-gr-card,.f-dia{page-break-inside:avoid}
}

@media (max-width:760px){
  .page{margin:0;border-radius:0}
  .f-head{grid-template-columns:1fr}
  .f-head .right{text-align:left}
  .f-tbl{column-count:1}
  .f-pn{grid-template-columns:1fr}
  .f-ex .item{grid-template-columns:1fr;gap:8px}
  .f-gr-card{grid-template-columns:1fr}
  .f-dia .turn{grid-template-columns:1fr}
}

/* === レッスンナビ（前の課/目次/次の課・2026-05-29 追加） === */
.f-nav{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 44px;background:var(--F-paper)}
.f-nav.top{border-bottom:1px solid var(--F-rule)}
.f-nav.bottom{border-top:1px solid var(--F-rule)}
.f-nav a,.f-nav .disabled{
  font-family:"Inter","Source Sans 3","Segoe UI",sans-serif;
  font-size:14px;font-weight:800;letter-spacing:.04em;text-decoration:none;
  padding:8px 16px;border-radius:4px;white-space:nowrap;transition:background .12s,color .12s;
}
.f-nav .prev,.f-nav .next{color:var(--F-ink);border:1.5px solid var(--F-ink);background:#fff}
.f-nav .prev:hover,.f-nav .next:hover{background:var(--F-ink);color:#fff}
.f-nav .toc{color:#fff;background:var(--F-magenta);border:1.5px solid var(--F-magenta)}
.f-nav .toc:hover{background:#a94a41;border-color:#a94a41}
.f-nav .disabled{color:#aeb6bf;border:1.5px solid #d8dde3;background:#f3f1ea;cursor:default}
@media print{ .f-nav{display:none} }
@media (max-width:600px){
  .f-nav{padding:12px 16px;gap:6px}
  .f-nav a,.f-nav .disabled{padding:7px 10px;font-size:12.5px}
}