@import url('https://fonts.googleapis.com/css2?family=ZCOOL+KuaiLe&display=swap');

:root {
  --mc-green: #5D8C3E;
  --mc-brown: #8B6914;
  --mc-dirt: #6B4226;
  --mc-stone: #7F7F7F;
  --mc-sky: #87CEEB;
  --mc-gold: #FFD700;
  --mc-red: #C0392B;
  --mc-dark: #2C2C2C;
  --mc-grass: #4CAF50;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'ZCOOL KuaiLe', sans-serif;
  background: linear-gradient(180deg, var(--mc-sky) 0%, #B8E6B8 100%);
  min-height: 100vh;
  color: var(--mc-dark);
  image-rendering: pixelated;
}

header {
  text-align: center;
  padding: 20px;
  background: linear-gradient(180deg, var(--mc-green), var(--mc-dirt));
  color: white;
  text-shadow: 3px 3px 0 rgba(0,0,0,0.4);
  border-bottom: 4px solid var(--mc-brown);
}

header h1 { font-size: 2em; letter-spacing: 2px; }
.subtitle { font-size: 1em; opacity: 0.9; margin-top: 4px; }

#progress-bar {
  width: 80%; max-width: 400px; height: 20px;
  background: var(--mc-stone); margin: 12px auto 4px;
  border: 3px solid var(--mc-dark); border-radius: 2px;
}
#progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--mc-grass), var(--mc-gold));
  transition: width 0.5s;
}
#progress-text { font-size: 0.85em; color: #ffffffcc; }

main { max-width: 800px; margin: 0 auto; padding: 16px; }
.page { display: none; }
.page.active { display: block; }

/* 诗歌卡片网格 */
#poem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.poem-card {
  background: #F5E6C8;
  border: 3px solid var(--mc-brown);
  border-radius: 4px;
  padding: 14px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  position: relative;
  text-align: center;
}
.poem-card:hover { transform: translateY(-4px); box-shadow: 0 6px 0 var(--mc-dirt); }
.poem-card.mastered { border-color: var(--mc-gold); background: #FFFDE7; }
.poem-card .num { font-size: 0.75em; color: var(--mc-stone); }
.poem-card .title { font-size: 1.15em; margin: 6px 0 4px; }
.poem-card .author { font-size: 0.85em; color: var(--mc-dirt); }
.poem-card .stars { margin-top: 6px; }
.poem-card .badge {
  position: absolute; top: -8px; right: -8px;
  background: var(--mc-gold); color: var(--mc-dark);
  border-radius: 50%; width: 28px; height: 28px;
  line-height: 28px; font-size: 14px;
  display: none;
}
.poem-card.mastered .badge { display: block; }

/* 分类标题 */
.category-title {
  font-size: 1.2em; margin: 20px 0 10px;
  padding: 6px 12px;
  background: var(--mc-dirt); color: white;
  border-radius: 4px; display: inline-block;
}
.category-title:first-child { margin-top: 0; }

/* 按钮 */
.btn-back {
  background: var(--mc-stone); color: white;
  border: 2px solid var(--mc-dark); padding: 8px 16px;
  font-family: inherit; font-size: 0.95em;
  cursor: pointer; border-radius: 4px; margin-bottom: 12px;
}
.btn-back:hover { background: var(--mc-dark); }

.btn {
  display: inline-block; padding: 10px 20px;
  font-family: inherit; font-size: 1em;
  border: 3px solid var(--mc-dark); border-radius: 4px;
  cursor: pointer; margin: 6px; color: white;
  text-shadow: 1px 1px 0 rgba(0,0,0,0.3);
}
.btn-green { background: var(--mc-grass); }
.btn-green:hover { background: #388E3C; }
.btn-gold { background: var(--mc-brown); }
.btn-gold:hover { background: #6B4226; }
.btn-red { background: var(--mc-red); }
.btn-red:hover { background: #922B21; }

/* 详情页 */
.detail-box {
  background: #F5E6C8; border: 3px solid var(--mc-brown);
  border-radius: 6px; padding: 20px; margin-bottom: 16px;
}
.detail-box h2 { font-size: 1.4em; margin-bottom: 8px; }
.detail-box h3 { font-size: 1.1em; margin: 12px 0 6px; color: var(--mc-dirt); }
.poem-text {
  font-size: 1.15em; line-height: 2;
  background: #FFF8E7; padding: 14px;
  border: 2px dashed var(--mc-brown); border-radius: 4px;
  margin: 10px 0; white-space: pre-line;
}
.tip-box {
  background: #E8F5E9; border-left: 4px solid var(--mc-grass);
  padding: 10px 14px; margin: 10px 0; border-radius: 0 4px 4px 0;
}
.warn-box {
  background: #FFF3E0; border-left: 4px solid #FF9800;
  padding: 10px 14px; margin: 10px 0; border-radius: 0 4px 4px 0;
}
.mc-box {
  background: #E3F2FD; border-left: 4px solid #2196F3;
  padding: 10px 14px; margin: 10px 0; border-radius: 0 4px 4px 0;
}
.quiz-box {
  background: #F3E5F5; border: 2px solid #9C27B0;
  padding: 12px; margin: 10px 0; border-radius: 6px;
}
.quiz-box .answer { display: none; margin-top: 8px; color: var(--mc-grass); font-weight: bold; }
.quiz-box.revealed .answer { display: block; }
.detail-img { width: 100%; max-width: 500px; border-radius: 6px; margin: 10px auto; display: block; border: 3px solid var(--mc-brown); }
.btn-row { text-align: center; margin: 16px 0; }

/* 练习页 */
.practice-title { text-align: center; font-size: 1.3em; margin-bottom: 14px; }
.fill-line {
  font-size: 1.15em; line-height: 2.2; margin: 4px 0;
  background: #FFF8E7; padding: 6px 10px; border-radius: 4px;
}
.fill-blank {
  display: inline-block; min-width: 60px;
  border-bottom: 2px solid var(--mc-dark);
  text-align: center; padding: 0 4px;
  font-family: inherit; font-size: 1em;
  background: transparent; outline: none;
}
.fill-blank.correct { border-color: var(--mc-grass); color: var(--mc-grass); }
.fill-blank.wrong { border-color: var(--mc-red); color: var(--mc-red); }

.write-area {
  width: 100%; min-height: 200px; font-family: inherit;
  font-size: 1.1em; line-height: 2; padding: 12px;
  border: 3px solid var(--mc-brown); border-radius: 6px;
  background: #FFF8E7; resize: vertical;
}
.result-box {
  text-align: center; padding: 20px; margin-top: 16px;
  border-radius: 8px; font-size: 1.2em;
}
.result-box.pass { background: #E8F5E9; border: 3px solid var(--mc-grass); }
.result-box.fail { background: #FFEBEE; border: 3px solid var(--mc-red); }

/* 音频播放器 */
.audio-bar {
  display: flex; gap: 6px; margin: 10px 0 14px;
  flex-wrap: nowrap;
}
.ab {
  flex: 1; min-width: 0;
  background: var(--mc-grass); color: white;
  border: 2px solid var(--mc-dark); border-radius: 8px;
  padding: 8px 4px; font-size: 14px;
  cursor: pointer; text-align: center;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  font-family: inherit;
}
.ab:active { transform: scale(0.95); }
.ab-stop { flex: 0 0 42px; background: var(--mc-red); }

.trans-box { background:#FFF8E1; padding:12px; border-radius:8px; border-left:4px solid var(--mc-gold); line-height:1.9; font-size:15px; }
.notes-box { background:#E3F2FD; padding:12px; border-radius:8px; border-left:4px solid #42A5F5; line-height:1.8; font-size:14px; }
.method-box { background:#F3E5F5; padding:12px; border-radius:8px; border-left:4px solid #AB47BC; line-height:1.8; font-size:14px; }

/* 动画 */
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-4px)} 75%{transform:translateX(4px)} }
.shake { animation: shake 0.3s; }
@keyframes pop { 0%{transform:scale(1)} 50%{transform:scale(1.15)} 100%{transform:scale(1)} }
.pop { animation: pop 0.3s; }