/* 小学生向けに読みやすいフォントを既定に */
html, body {
  font-family: 'BIZ UDPGothic', 'Hiragino Sans', 'Yu Gothic', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ドラッグ中のドロップエリア強調 */
#drop-area.is-dragover {
  background-color: #fff;
  border-color: #0284c7;
  transform: scale(1.02);
  transition: all 0.15s ease;
}

/* 解説内のSVG図解 */
.step-diagram svg,
#result-summary svg {
  max-width: 100%;
  height: auto;
  background: #f8fafc;
  border-radius: 1rem;
  padding: 0.5rem;
  display: block;
  margin: 0 auto;
}

/* ステップカード */
.step-card {
  background: linear-gradient(135deg, #fff 0%, #fff7ed 100%);
  border: 2px solid #fde68a;
  border-radius: 1.25rem;
  padding: 1.25rem;
  position: relative;
}
.step-card .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: white;
  font-weight: 800;
  border-radius: 9999px;
  margin-right: 0.5rem;
  font-size: 1rem;
}
.step-card .step-title {
  font-weight: 800;
  font-size: 1.05rem;
  color: #b45309;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
}
.step-card .step-body {
  color: #1e293b;
  line-height: 1.8;
}

/* 例題の小カード */
.step-card .example-box {
  background: #fef3c7;
  border-left: 4px solid #f59e0b;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  margin: 0.75rem 0;
  font-size: 0.95em;
}

/* 解説のマークダウン整形 */
.step-body ol,
.step-body ul {
  padding-left: 1.5em;
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}
.step-body li {
  margin-top: 0.4em;
  margin-bottom: 0.4em;
}
.step-body strong {
  color: #db2777;
  font-weight: 700;
}
.step-body code {
  background: #fef3c7;
  padding: 0.1em 0.4em;
  border-radius: 0.4em;
  font-size: 0.95em;
  color: #92400e;
  font-weight: 600;
}
.step-body h2,
.step-body h3 {
  font-weight: 700;
  margin-top: 0.8em;
  margin-bottom: 0.4em;
  color: #0369a1;
}
.step-body p {
  margin-top: 0.6em;
  margin-bottom: 0.6em;
}

/* 答え/解説 ロック中・解放後の切替 */
#answer-card .answer-locked-view,
#answer-card .answer-revealed-view,
#explanation-card .explanation-locked-view,
#explanation-card .explanation-revealed-view {
  transition: opacity 0.2s ease;
}

/* キャラクターの軽いアニメーション */
.mascot-bounce {
  animation: mascot-bounce 2s ease-in-out infinite;
}
@keyframes mascot-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}