/* かんじチェック 共通スタイル
   デジタル庁デザインシステム(DADS)準拠: 本文4.5:1以上 / 枠線3:1以上 / 本文16px以上 /
   状態は色だけでなく記号と文言でも示す。 */
:root {
  --ink: #1a1a1c;        /* 本文        対 #fff 16.9:1 */
  --ink-sub: #55555a;    /* 補助文字    対 #fff  7.5:1 */
  --line: #6f6f78;       /* 枠線        対 #fff  4.8:1 */
  --line-soft: #d4d4da;
  --bg: #f2f2f4;
  --paper: #fff;
  --key: #0b5cad;        /* キーカラー  対 #fff  6.4:1 */
  --key-dark: #084380;
  --ok: #13653a;         /* 対 #fff 6.0:1 */
  --ok-bg: #e8f5ee;
  --ng: #ad2016;         /* 対 #fff 6.8:1 */
  --ng-bg: #fdecea;
  --warn-bg: #fff4e0;
  --warn-line: #8a5a00;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 12px calc(48px + env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 760px; margin: 0 auto; }

h1 { font-size: 22px; line-height: 1.4; margin: 0; }
h2 { font-size: 18px; line-height: 1.4; margin: 0 0 12px; }
h3 { font-size: 16px; line-height: 1.4; margin: 20px 0 8px; }
p { margin: 0 0 10px; }
.note { font-size: 15px; color: var(--ink-sub); line-height: 1.65; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 15px;
  background: #eceef1; border: 1px solid var(--line-soft); border-radius: 5px; padding: 1px 6px;
}
.tiny { font-size: 14px; color: var(--ink-sub); }
a { color: var(--key); }

.site-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  max-width: 760px; margin: 0 auto; padding: 18px 4px 12px;
}
.site-head .sub { font-size: 15px; color: var(--ink-sub); }

.card {
  background: var(--paper); border: 1px solid var(--line-soft);
  border-radius: 14px; padding: 16px; margin: 0 0 12px;
}

/* ------------------------------------------------------------------ ボタン */
.btn {
  font-family: inherit; font-size: 16px; font-weight: 700; line-height: 1;
  padding: 14px 16px; border-radius: 10px; cursor: pointer; min-height: 48px;
}
.btn-main { background: var(--key); color: #fff; border: 2px solid var(--key-dark); }
.btn-main:hover { background: var(--key-dark); }
.btn-main:active { background: #06315e; }
.btn-sub { background: var(--paper); color: var(--ink); border: 2px solid var(--line); }
.btn-sub:hover { background: #e9e9ee; }
.btn-sub:active { background: #dcdce2; }
.btn-danger { background: var(--paper); color: var(--ng); border: 2px solid var(--ng); }
.btn-danger:hover { background: var(--ng-bg); }
.btn:disabled { background: #8b8b93; color: #fff; border-color: #6d6d75; cursor: not-allowed; }
.btn-wide { width: 100%; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn:focus-visible, input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 3px solid var(--key); outline-offset: 2px;
}

/* ------------------------------------------------------------------ 入力 */
label.field { display: block; margin-bottom: 12px; }
label.field > span { display: block; font-size: 15px; font-weight: 700; margin-bottom: 4px; }
input[type="text"], input[type="number"], textarea {
  font-family: inherit; font-size: 16px; width: 100%; padding: 11px 12px;
  border: 2px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink);
}
textarea { line-height: 1.6; resize: vertical; }

fieldset { border: 1px solid var(--line-soft); border-radius: 10px; padding: 12px; margin: 0 0 14px; }
legend { font-size: 15px; font-weight: 700; padding: 0 6px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; }
.chip input { position: absolute; opacity: 0; width: 0; height: 0; }
.chip span {
  display: inline-block; padding: 10px 13px; font-size: 15px; line-height: 1;
  border: 2px solid var(--line); border-radius: 999px; background: var(--paper); cursor: pointer;
}
.chip span::before { content: "☐ "; }
.chip input:checked + span { background: var(--key); color: #fff; border-color: var(--key-dark); }
.chip input:checked + span::before { content: "☑ "; }
.chip input:focus-visible + span { outline: 3px solid var(--key); outline-offset: 2px; }

.check, .radio {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 9px 4px; font-size: 15px; line-height: 1.5; cursor: pointer;
}
.check input, .radio input {
  width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--key); flex: 0 0 auto;
}

/* ------------------------------------------------------------------ 手書き欄 */
.pad-wrap { position: relative; }
canvas.pad {
  display: block; width: min(100%, 400px); aspect-ratio: 1/1; margin: 0 auto;
  background: var(--paper); border: 2px solid var(--line); border-radius: 12px;
  touch-action: none; -webkit-user-select: none; user-select: none; cursor: crosshair;
}
.pad-hint {
  position: absolute; inset: 0; margin: 0; display: grid; place-items: center;
  pointer-events: none; font-size: 17px; color: var(--ink-sub);
}
.pad-bar { display: flex; gap: 8px; align-items: center; margin-top: 10px; }
.pad-stat { margin-left: auto; font-size: 15px; color: var(--ink-sub); }

/* ------------------------------------------------------------------ 表示部品 */
.kanji { font-family: "Hiragino Mincho ProN", "Yu Mincho", serif; }

.code-box { text-align: center; padding: 4px 0 8px; }
.code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: clamp(38px, 12vw, 56px); font-weight: 700; letter-spacing: .12em;
  margin: 4px 0; line-height: 1.2;
}
.code-box img { display: block; margin: 8px auto; width: 200px; height: 200px; image-rendering: pixelated; }
.url { font-size: 15px; word-break: break-all; }

.banner { padding: 12px 14px; border-radius: 10px; font-size: 15px; margin: 0 0 12px; }
.banner-warn { background: var(--warn-bg); border: 2px solid var(--warn-line); }
.banner-ng { background: var(--ng-bg); border: 2px solid var(--ng); color: var(--ng); font-weight: 700; }
.banner-ok { background: var(--ok-bg); border: 2px solid var(--ok); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.stat {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 12px 4px; background: #f4f7fb; border: 1px solid var(--line-soft); border-radius: 10px;
}
.stat-num { font-size: 22px; font-weight: 700; line-height: 1.2; }
.stat-label { font-size: 14px; color: var(--ink-sub); text-align: center; }

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { padding: 8px 6px; border-bottom: 1px solid var(--line-soft); text-align: left; }
th { font-size: 14px; color: var(--ink-sub); font-weight: 700; }
.mark-ok { color: var(--ok); font-weight: 700; }
.mark-ng { color: var(--ng); font-weight: 700; }

/* ○×と、まちがえたときの筆跡サムネイル */
.marks { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-start; }
.mark {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 15px; line-height: 1;
}
.mark svg {
  display: block; border: 1px solid var(--line-soft); border-radius: 4px; background: var(--paper);
}
/* ○×は押すと入れかえられる。押せることが分かるよう枠を付ける */
.mark-btn {
  font-family: inherit; cursor: pointer; padding: 6px 6px 4px; min-height: 44px;
  background: var(--paper); border: 2px solid var(--line); border-radius: 8px;
}
.mark-btn:hover { background: #e9e9ee; }
.mark-btn:active { background: #dcdce2; }
.mark-btn:disabled { opacity: .5; cursor: wait; }

.scroll-x { overflow-x: auto; }

/* ------------------------------------------------------------------ 英単語のマス目 */
.mean { font-size: 26px; font-weight: 700; line-height: 1.4; margin: 0 0 6px; }
.answer {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 30px; font-weight: 700; letter-spacing: .08em; margin: 0 0 4px;
}
.boxes { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.box {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 52px; flex: 0 0 auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 24px; font-weight: 700; line-height: 1;
  background: var(--paper); border: 2px solid var(--line); border-radius: 8px;
  color: var(--ink-sub);
}
.box small { position: absolute; bottom: 2px; right: 3px; font-size: 12px; line-height: 1; }
.box-ok { color: var(--ok); border-color: var(--ok); background: var(--ok-bg); }
.box-ng { color: var(--ng); border-color: var(--ng); background: var(--ng-bg); }
.box-given { color: var(--ink); border-style: dashed; }
.box-cur { outline: 3px solid var(--key); outline-offset: 2px; }

/* ------------------------------------------------------------------ お手本と自分の字 */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.compare figure { margin: 0; min-width: 0; }
.compare figcaption { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.compare figcaption .kanji { font-size: 20px; }
.compare canvas {
  display: block; width: 100%; max-width: 300px; margin-inline: auto; aspect-ratio: 1/1;
  background: var(--paper); border: 2px solid var(--line); border-radius: 12px;
}
.compare .btn, .compare .check { margin-top: 8px; }
@media (max-width: 480px) {
  .compare { grid-template-columns: 1fr; }
}

footer.site-foot {
  max-width: 760px; margin: 24px auto 0; padding: 14px 4px;
  font-size: 14px; color: var(--ink-sub); line-height: 1.7;
  border-top: 1px solid var(--line-soft);
}