/* ===== 原稿用紙カラー（中性紙風） ===== */
:root{
  --paper:#f3ecd1;
  --paper2:#efe4bf;
  --ink:#1b1a16;
}

/* ===== Sheets Layout ===== */
.sheets{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
@media (max-width: 520px){
  .sheets{grid-template-columns:1fr}
}

.sheet{
  position: relative;
  border-radius:18px;
  border:1px solid rgba(0,0,0,.15);
  background:radial-gradient(1200px 500px at 20% 0%, var(--paper2), var(--paper));
  padding:10px;
  color:var(--ink);
}
.sheet-label{font-size:12px;opacity:.8;margin-bottom:4px}

/* ===== Page Number ===== */
.page-no{
  position:absolute;
  top:10px;
  right:10px;
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(27,26,22,.55);
  background:rgba(255,255,255,.22);
  border:1px solid rgba(0,0,0,.12);
  border-radius:999px;
  padding:2px 8px;
  user-select:none;
}

/* 縦書き時のページ番号 */
.sheets[data-vertical="true"] .page-no{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  padding:6px 5px;
}

/* ===== メタ欄（題・名・日） ===== */
.sheet-meta{
  border:1px solid rgba(0,0,0,.18);
  background:rgba(255,255,255,.18);
  border-radius:12px;
  padding:8px 10px;
  margin-bottom:8px;
  display:flex;
  flex-direction:column;
  gap:6px;
  color:rgba(27,26,22,.75);
  position: relative;
}
.sheet-meta.hidden{display:none}

.sheet-meta::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:12px;
  pointer-events:none;
  background:
    linear-gradient(transparent 62%, rgba(0,0,0,.06) 62%, rgba(0,0,0,.06) 64%, transparent 64%);
  opacity:.6;
  mix-blend-mode:multiply;
}

.meta-line{
  display:flex;
  align-items:center;
  gap:8px;
  min-width:0;
}
.meta-line-2{
  justify-content:space-between;
  gap:10px;
}
.meta-pack{
  display:flex;
  align-items:center;
  gap:8px;
  min-width:0;
}
.meta-cap{
  font-size:11px;
  opacity:.8;
  border:1px solid rgba(0,0,0,.18);
  padding:2px 6px;
  border-radius:999px;
  background:rgba(255,255,255,.22);
}
.meta-text{
  font-size:12px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:260px;
}
.meta-title-text{
  font-weight:600;
  letter-spacing:.02em;
}

/* 空欄ガイド */
.meta-text:empty::before{
  content: attr(data-ph);
  opacity: .55;
}

/* スマホ時の幅調整 */
@media (max-width: 520px){
  .meta-text{max-width:170px}
}

/* ===== 縦書き時：メタ欄も縦組みっぽく ===== */
.sheets[data-vertical="true"] .sheet-meta{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  flex-direction: row;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 12px;
  padding: 8px 8px;
}
.sheets[data-vertical="true"] .meta-line{
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.sheets[data-vertical="true"] .meta-line-2{
  justify-content: flex-start;
  gap: 12px;
}
.sheets[data-vertical="true"] .meta-pack{
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.sheets[data-vertical="true"] .meta-text{
  white-space: normal;
  overflow: hidden;
  text-overflow: clip;
  max-width: none;
  max-height: 10em;
}

/* ===== Grid ===== */
.grid{
  display:grid;
  grid-template-columns:repeat(20, 1fr);
  gap:1px;
  background:rgba(0,0,0,.12);
  padding:1px;
  border-radius:12px;
}

.cell{
  background:rgba(255,255,255,.35);
  border-radius:2px;
  width:100%;
  aspect-ratio:1/1;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  line-height:1;
  user-select:none;
}
.cell.empty{background:rgba(255,255,255,.22)}

/* 縦書き時のセル配置 */
.sheets[data-vertical="true"] .grid{
  writing-mode:vertical-rl;
  grid-auto-flow:column;
}

/* ===== 続きガイド ===== */
.continue-hint{
  margin-top:6px;
  text-align:right;
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(27,26,22,.55);
  user-select:none;
  opacity:0;
  transform:translateY(-2px);
  transition:opacity .15s ease, transform .15s ease;
}
.continue-hint.show{
  opacity:1;
  transform:translateY(0);
}

.continue-back{
  margin:6px 0 6px;
  text-align:left;
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(27,26,22,.55);
  user-select:none;
  opacity:0;
  transform:translateY(-2px);
  transition:opacity .15s ease, transform .15s ease;
}
.continue-back.show{
  opacity:1;
  transform:translateY(0);
}

/* 縦書き時の続きガイド */
.sheets[data-vertical="true"] .continue-hint{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-align:left;
  margin-top:8px;
  align-self:flex-end;
}
.sheets[data-vertical="true"] .continue-back{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-align:right;
  margin:8px 0 8px;
}

/* ===== 最後のマス（800）強調 ===== */
.cell.limit{
  outline:2px solid rgba(0,0,0,.22);
  outline-offset:-2px;
}
.cell.limit-full{
  outline:2px solid rgba(251,113,133,.70);
  outline-offset:-2px;
  background:rgba(251,113,133,.12);
}

/* ===== カーソル（次のマス） ===== */
.cell.cursor{
  outline:2px solid rgba(0,0,0,.28);
  outline-offset:-2px;
  background:rgba(125,211,252,.12);
}

/* ===== 今いる行（20マス帯） ===== */
.cell.row-focus{
  background:rgba(125,211,252,.07);
}