/* ============================================================
   マウス道場 共通CSS
   ============================================================ */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", "Yu Gothic", sans-serif;
  background-color: #f5f0e8;
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 31px, rgba(0,0,0,0.03) 31px, rgba(0,0,0,0.03) 32px),
    repeating-linear-gradient(90deg, transparent 0, transparent 31px, rgba(0,0,0,0.03) 31px, rgba(0,0,0,0.03) 32px);
  color: #222;
  line-height: 1.7;
  font-size: 17px;
}
ruby rt { font-size: 0.55em; }
.pixel-font { font-family: "DotGothic16", "Helvetica Neue", sans-serif; letter-spacing: 0.04em; }

/* ヘッダー */
header {
  background: #fff; border-bottom: 3px solid #1abc9c;
  padding: 12px 20px; position: sticky; top: 0; z-index: 10;
}
.header-container {
  max-width: 1000px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #222; }
.logo-img { height: 40px; }
.logo-text { font-weight: bold; font-size: 1.05rem; display: flex; flex-direction: column; line-height: 1.2; }
.logo-text-sub { font-size: 0.7rem; color: #666; }
.back-to-overview {
  background: #1abc9c; color: #fff; padding: 6px 14px;
  border-radius: 4px; text-decoration: none; font-size: 0.9rem; font-weight: bold; white-space: nowrap;
}

/* レイアウト */
main { max-width: 900px; margin: 24px auto; padding: 0 16px; }

/* 共通カード */
.card-base {
  background: #fff; border: 3px solid #222; border-radius: 12px;
  padding: 18px 22px; box-shadow: 4px 4px 0 #222;
}

/* 共通ボタン */
.cta-btn {
  font-family: "DotGothic16", sans-serif; font-size: 1.1rem;
  padding: 12px 24px; border: 3px solid #222; border-radius: 8px;
  background: #1abc9c; color: #fff; cursor: pointer;
  box-shadow: 4px 4px 0 #222;
  transition: transform 0.05s ease, box-shadow 0.05s ease;
}
.cta-btn:hover { transform: translate(1px, 1px); box-shadow: 3px 3px 0 #222; }
.cta-btn:active { transform: translate(4px, 4px); box-shadow: 0 0 0 #222; }
.cta-btn.secondary { background: #fff; color: #222; }
.cta-btn.primary-start {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: min(100%, 320px);
  min-height: 58px;
  padding: 14px 24px;
  background: linear-gradient(180deg, #ffcf3f, #f39c12);
  color: #22180a;
  border-color: #4a3520;
  border-radius: 10px;
  box-shadow: 0 7px 0 #4a3520, 0 16px 28px rgba(74,53,32,0.2);
  font-family: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: 0;
}
.cta-btn.primary-start:hover {
  transform: translateY(2px);
  box-shadow: 0 5px 0 #4a3520, 0 12px 22px rgba(74,53,32,0.18);
}
.cta-btn.primary-start:active {
  transform: translateY(7px);
  box-shadow: 0 0 0 #4a3520;
}
.cta-btn.primary-start .start-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #fff;
  color: #1abc9c;
  font-size: 0.92rem;
  line-height: 1;
}
.lesson-actions {
  display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 12px;
}
.lesson-actions a {
  font-family: "DotGothic16", sans-serif;
  background: #fff; color: #222; border: 3px solid #222; border-radius: 8px;
  box-shadow: 3px 3px 0 #222; padding: 8px 14px; text-decoration: none;
}
.lesson-actions a:first-child { background: #fff36a; }
.lesson-actions-center { align-items: center; }

/* 設定UI */
.setting-row { display: flex; flex-direction: column; gap: 8px; }
.setting-row > label.title {
  font-family: "DotGothic16", sans-serif; font-size: 1rem;
}
.radio-group { display: flex; flex-wrap: wrap; gap: 6px; }
.radio-group label {
  font-family: "DotGothic16", sans-serif; font-size: 0.95rem;
  padding: 6px 14px; border: 2px solid #222; border-radius: 6px;
  background: #fff; cursor: pointer; user-select: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.radio-group input[type="radio"] {
  appearance: none; -webkit-appearance: none;
  width: 14px; height: 14px; border: 2px solid #222;
  border-radius: 50%; position: relative; cursor: pointer; margin: 0;
}
.radio-group input[type="radio"]:checked { background: #1abc9c; }
.radio-group label:has(input:checked) { background: #fff36a; }

/* 難易度カード */
.difficulty-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px;
}
.difficulty-cards label {
  font-family: "DotGothic16", sans-serif; cursor: pointer; user-select: none;
  border: 2px solid #222; border-radius: 8px; padding: 10px 12px; text-align: center;
  background: #fff; display: flex; flex-direction: column; gap: 4px;
}
.difficulty-cards label:has(input:checked) { background: #fff36a; box-shadow: 2px 2px 0 #222; }
.difficulty-cards input[type="radio"] { display: none; }
.difficulty-cards .level-emoji { font-size: 1.6rem; }
.difficulty-cards .level-name { font-size: 1rem; }
.difficulty-cards .level-desc { font-size: 0.75rem; color: #555; }

/* 統計 */
.stats-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.stat-box {
  background: #f8f9fa; border: 2px solid #222; border-radius: 8px;
  padding: 8px 6px; text-align: center;
}
.stat-label { font-size: 0.8rem; color: #555; }
.stat-value { font-family: "DotGothic16", sans-serif; font-size: 1.4rem; color: #1abc9c; }
.stat-value.wrong-color { color: #e74c3c; }

/* 完了パネル */
.complete-panel {
  background: linear-gradient(180deg, #fff36a, #ffd35a);
  border: 3px solid #222; border-radius: 12px;
  box-shadow: 4px 4px 0 #222; padding: 22px; text-align: center;
  display: none; margin-top: 20px;
}
.complete-panel.is-shown { display: block; }
.complete-panel.is-fail { background: linear-gradient(180deg, #ffc4c4, #ff8888); }
.complete-title { font-family: "DotGothic16", sans-serif; font-size: 1.5rem; margin: 0 0 12px; }
.complete-stats {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 14px;
}
.complete-stat {
  background: #fff; border: 2px solid #222; border-radius: 8px;
  padding: 8px 14px; font-family: "DotGothic16", sans-serif;
}
.complete-stat strong { color: #1abc9c; font-size: 1.3rem; }

.medal-display {
  font-size: 4rem; margin: 8px 0;
  filter: drop-shadow(3px 3px 0 #222);
  animation: medal-pop 0.6s ease-out;
}
@keyframes medal-pop {
  0% { transform: scale(0) rotate(-180deg); }
  60% { transform: scale(1.2) rotate(20deg); }
  100% { transform: scale(1) rotate(0deg); }
}

/* レコード表示 */
.records-card {
  background: #fff; border: 3px dashed #f39c12;
  border-radius: 12px; padding: 16px 20px; margin-top: 20px;
}
.records-card h2 {
  font-family: "DotGothic16", sans-serif; font-size: 1.1rem; margin: 0 0 10px;
}
.records-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.records-list li {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  padding: 6px 10px; background: #fff8e1; border-radius: 6px; border: 1px solid #ddd;
}
.records-list .meta { color: #666; font-size: 0.85rem; }
.records-list .score-val { font-family: "DotGothic16", sans-serif; font-size: 1.2rem; color: #f39c12; margin-left: auto; }
.records-list .empty { color: #888; font-style: italic; }

/* フォーカス */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 4px solid #fff36a; outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(34,34,34,0.35);
}

/* フッター */
footer {
  background: #222; color: #ddd; text-align: center;
  padding: 20px; font-size: 0.9rem; margin-top: 30px;
}
.footer-content { max-width: 900px; margin: 0 auto; }