/* shisha.css — 四捨五入の計算機。すべて .sh 配下にスコープ（サイトのCSSと干渉しない）。
   デザインはsimeq/eqn/bunsu/insu/hireiと同じ「方眼ノートに青インク・答えは赤」の系統で計算機ファミリーの統一感を保つ。
   ダークは .sh[data-sh-theme="dark"] で切替（サイト本番は常にライト）。 */
.sh {
  --sh-paper: #ffffff;
  --sh-ground: #f3f6fc;
  --sh-ink: #1a2657;
  --sh-sub: #55618a;
  --sh-line: #d3daee;
  --sh-grid: rgba(70, 100, 190, .10);
  --sh-accent: #2f52c4;
  --sh-accent-ink: #ffffff;
  --sh-red: #d23c50;
  --sh-warn-bg: #fff3ef;
  --sh-warn: #a63a26;
  --sh-key: #eef2fb;
  --sh-keep-bg: #e3ebff;
  --sh-look-bg: #ffe9b8;
  --sh-look-line: #d98a00;
  --sh-drop-bg: #f1f1f4;
  --sh-drop-ink: #8a8fa6;
  --sh-font: "Hiragino Maru Gothic ProN", "BIZ UDPGothic", "Yu Gothic UI", Meiryo, sans-serif;
  --sh-math: "Hiragino Mincho ProN", "BIZ UDPMincho", "Yu Mincho", "Noto Serif JP", "Times New Roman", serif;
  box-sizing: border-box;
  max-width: 680px;
  margin: 0 auto;
  color: var(--sh-ink);
  font-family: var(--sh-font);
  font-size: 16px;
  line-height: 1.7;
  text-align: left;
}
.sh[data-sh-theme="dark"] {
  --sh-paper: #182036;
  --sh-ground: #0f1526;
  --sh-ink: #e4e9fb;
  --sh-sub: #a2aed3;
  --sh-line: #303c66;
  --sh-grid: rgba(140, 165, 245, .09);
  --sh-accent: #8fa8ff;
  --sh-accent-ink: #0f1526;
  --sh-red: #ff7d8e;
  --sh-warn-bg: #3a2320;
  --sh-warn: #ffb4a3;
  --sh-key: #222c4a;
  --sh-keep-bg: #243158;
  --sh-look-bg: #5a4210;
  --sh-look-line: #ffc34d;
  --sh-drop-bg: #232a40;
  --sh-drop-ink: #7e89ad;
}
.sh *, .sh *::before, .sh *::after { box-sizing: border-box; }
:where(.sh button) { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
.sh :focus-visible { outline: 3px solid var(--sh-accent); outline-offset: 2px; }

.sh-card { background: var(--sh-paper); border: 1px solid var(--sh-line); border-radius: 14px; padding: 16px; margin-bottom: 14px; }
.sh-grid {
  background-image:
    linear-gradient(var(--sh-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--sh-grid) 1px, transparent 1px);
  background-size: 22px 22px;
  background-color: var(--sh-paper);
}
.sh-h { margin: 0 0 10px; font-size: 15px; font-weight: 700; color: var(--sh-sub); letter-spacing: .04em; }
.sh-h2 { margin-top: 12px; margin-bottom: 8px; }
.sh-h-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 4px; flex-wrap: wrap; }
.sh-h-row .sh-h { margin: 0; }

/* ---- 入力 ---- */
.sh-input {
  width: 100%; height: 52px; padding: 0 14px; border: 2px solid var(--sh-line); border-radius: 10px;
  background: var(--sh-paper); color: var(--sh-ink); font-family: var(--sh-math); font-size: 24px;
  letter-spacing: .04em; margin-bottom: 4px;
}
.sh-modes { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.sh-mode { padding: 8px 12px; border-radius: 10px; background: var(--sh-key); border: 2px solid var(--sh-line); font-size: 14px; color: var(--sh-sub); }
.sh-mode[aria-checked="true"] { background: var(--sh-accent); border-color: var(--sh-accent); color: var(--sh-accent-ink); font-weight: 700; }
.sh-sentence { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; font-size: 17px; }
.sh-select {
  height: 44px; padding: 0 10px; border: 2px solid var(--sh-line); border-radius: 10px;
  background: var(--sh-paper); color: var(--sh-ink); font: inherit; font-size: 17px; font-weight: 700;
}
.sh-select[hidden] { display: none; }

.sh-examples { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.sh-chip { padding: 6px 12px; border-radius: 999px; background: var(--sh-key); color: var(--sh-sub); font-size: 13px; border: 1px solid var(--sh-line); }
.sh-chip:hover { background: var(--sh-line); }

.sh-error { background: var(--sh-warn-bg); color: var(--sh-warn); border-radius: 10px; padding: 10px 14px; font-size: 14px; margin-bottom: 12px; }
.sh-solve {
  display: block; width: 100%; height: 52px; border-radius: 14px; background: var(--sh-accent);
  color: var(--sh-accent-ink); font-size: 20px; font-weight: 700; letter-spacing: .05em;
}
.sh-solve:active { transform: translateY(1px); }

/* ---- 答え ---- */
.sh-answer-card { text-align: center; }
.sh-answer-badge { font-family: var(--sh-math); font-size: 30px; font-weight: 700; color: var(--sh-red); min-height: 44px; word-break: break-all; }
.sh-answer-badge.sh-long { font-size: 20px; }
.sh-answer-sub { margin-top: 8px; font-size: 14px; color: var(--sh-sub); word-break: break-all; }
.sh-notes { margin: 10px 0 0; padding: 8px 12px 8px 28px; border-radius: 10px; background: var(--sh-warn-bg); color: var(--sh-warn); font-size: 13px; text-align: left; }
.sh-notes[hidden] { display: none; }

/* ---- とき方 ---- */
.sh-hint-toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--sh-sub); }
.sh-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.sh-step { border: 1px solid var(--sh-line); border-radius: 10px; overflow: hidden; }
.sh-step-head { display: flex; align-items: center; gap: 10px; padding: 10px 12px; background: var(--sh-ground); cursor: pointer; }
.sh-step-badge { flex: none; padding: 2px 10px; border-radius: 999px; background: var(--sh-accent); color: var(--sh-accent-ink); font-size: 12px; font-weight: 700; }
.sh-step-title { font-weight: 700; font-size: 14px; }
.sh-step-body { padding: 10px 14px 14px; }
.sh-step-line { font-size: 15px; margin-bottom: 4px; word-break: break-all; }

/* ---- 桁の表 ---- */
.sh-table-wrap { margin-bottom: 8px; }
.sh-table-scroll { overflow-x: auto; padding-bottom: 4px; }
.sh-table { border-collapse: separate; border-spacing: 3px; margin: 0 auto; font-family: var(--sh-math); }
.sh-table th, .sh-table td { min-width: 34px; padding: 3px 4px; text-align: center; border-radius: 6px; border: 2px solid transparent; font-weight: 400; }
.sh-table th { font-family: var(--sh-font); font-size: 11px; line-height: 1.25; color: var(--sh-sub); vertical-align: bottom; }
.sh-digit { font-size: 22px; font-weight: 700; }
.sh-mark { font-family: var(--sh-font); font-size: 10px; line-height: 1.2; color: var(--sh-sub); white-space: nowrap; }
.sh-table .sh-point { min-width: 12px; padding: 0; border: none; background: none; font-size: 22px; }
.sh-table td.sh-keep, .sh-table td.sh-keeplast { background: var(--sh-keep-bg); }
.sh-table td.sh-keeplast { border-color: var(--sh-accent); }
.sh-table td.sh-look { background: var(--sh-look-bg); border-color: var(--sh-look-line); }
.sh-table td.sh-drop { background: var(--sh-drop-bg); color: var(--sh-drop-ink); }
.sh-table .sh-lead0 { opacity: .35; }
.sh-table .sh-virtual { opacity: .55; border-style: dashed !important; }
.sh-legend { display: flex; flex-wrap: wrap; gap: 8px 14px; justify-content: center; margin-top: 6px; font-size: 12px; color: var(--sh-sub); }
.sh-lg::before { content: ""; display: inline-block; width: 12px; height: 12px; margin-right: 5px; border-radius: 3px; vertical-align: -1px; border: 2px solid transparent; }
.sh-lg.sh-keep::before { background: var(--sh-keep-bg); border-color: var(--sh-accent); }
.sh-lg.sh-look::before { background: var(--sh-look-bg); border-color: var(--sh-look-line); }
.sh-lg.sh-drop::before { background: var(--sh-drop-bg); }

/* ---- 共有 ---- */
.sh-share-card { display: flex; align-items: center; gap: 10px; }
.sh-copylink { padding: 8px 14px; border-radius: 10px; background: var(--sh-key); color: var(--sh-sub); font-size: 13px; border: 1px solid var(--sh-line); }
.sh-copymsg { font-size: 13px; color: var(--sh-accent); }

@media (max-width: 420px) {
  .sh-input { font-size: 20px; }
  .sh-answer-badge { font-size: 24px; }
  .sh-digit { font-size: 19px; }
  .sh-table th, .sh-table td { min-width: 30px; }
}