/* 
 * 👧 臭臭的识字大闯关 - 样式设计
 * 配色方案: 马卡龙奶油护眼色系 (粉、蓝、黄、绿)
 * 字体: 圆润、柔和、清晰
 */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600&family=ZCOOL+KuaiLe&display=swap');

:root {
  --color-bg: #f5f8ff;
  --color-primary: #ff8fa3; /* 软萌樱花粉 */
  --color-secondary: #8ecae6; /* 冰蓝色 */
  --color-accent: #ffd166; /* 奶黄色 */
  --color-success: #06d6a0; /* 薄荷绿 */
  --color-text: #2b2d42; /* 深炭灰，护眼不刺眼 */
  --color-card-bg: #ffffff;
  --font-family-title: 'ZCOOL KuaiLe', 'Outfit', sans-serif;
  --font-family-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-literal: 'DengXian', 'PingFang SC', 'Microsoft YaHei', 'Heiti SC', sans-serif; /* 标准等线/无衬线体，利于儿童辨认标准字形 */
  --shadow-soft: 0 10px 30px rgba(142, 202, 230, 0.15);
  --shadow-pop: 0 15px 35px rgba(255, 143, 163, 0.25);
  --radius-lg: 24px;
  --radius-md: 16px;
  --transition-bounce: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 20px;
  overflow-x: hidden;
}

/* 顶栏进度面板 */
.header-panel {
  max-width: 600px;
  width: 100%;
  margin: 0 auto 20px auto;
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-soft);
  border: 4px solid #ffffff;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0; /* 进度条隐藏后消除底部留白 */
  flex-wrap: wrap;
  gap: 10px;
}

.brand-title {
  font-family: var(--font-family-title);
  font-size: 2rem;
  color: var(--color-primary);
  text-shadow: 2px 2px 0px rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-emoji {
  animation: wave 2s infinite ease-in-out;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(15deg); }
}

.global-stats {
  display: flex;
  align-items: center;
  gap: 15px;
}

.flower-count {
  background: var(--color-accent);
  color: #725100;
  font-weight: bold;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 4px 10px rgba(255, 209, 102, 0.4);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.progress-bar-bg {
  flex-grow: 1;
  height: 20px;
  background: #f0f4f8;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  border: 2px solid #e1e9f0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
  width: 0%;
  border-radius: 10px;
  transition: width 0.6s ease;
  position: relative;
}

.progress-text {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-secondary);
  min-width: 90px;
  text-align: right;
}

/* 导航选项卡 */
.nav-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  max-width: 600px;
  width: 100%;
  margin: 0 auto 20px auto;
}

.tab-btn {
  flex: 1;
  max-width: 180px;
  padding: 12px 16px;
  border: none;
  background: var(--color-card-bg);
  color: #6c757d;
  font-family: var(--font-family-title);
  font-size: 1.15rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-bounce);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 3px solid transparent;
}

.tab-btn:hover {
  transform: translateY(-3px);
  color: var(--color-text);
}

.tab-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: #ffffff;
  box-shadow: var(--shadow-pop);
  transform: scale(1.05);
}

/* 主内容容器 */
.main-content {
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
  flex-grow: 1;
  position: relative;
}

.view-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

.view-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 首页视图：关卡列表 */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 10px 0;
}

.level-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  border: 4px solid #ffffff;
  transition: var(--transition-bounce);
  cursor: pointer;
}

.level-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--color-secondary);
}

.level-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.level-title {
  font-family: var(--font-family-title);
  font-size: 1.4rem;
  color: var(--color-text);
}

.level-badge {
  background: #f0f4f8;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: bold;
}

.groups-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.group-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  transition: var(--transition-bounce);
}

.group-row:hover {
  background: #eef4f8;
}

.group-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.group-progress {
  font-size: 0.85rem;
  font-weight: bold;
  color: #6c757d;
}

.group-actions {
  display: flex;
  gap: 6px;
}

.action-btn {
  border: none;
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition-bounce);
}

.action-btn.study {
  background: var(--color-secondary);
  color: white;
}

.action-btn.test {
  background: var(--color-success);
  color: white;
}

.action-btn:hover {
  transform: scale(1.1);
}

/* 学习与测试公用：卡片容器 */
.card-wrapper {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-soft);
  max-width: 600px;
  margin: 20px auto;
  border: 6px solid #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sub-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  color: #6c757d;
  font-weight: bold;
}

.quit-btn {
  background: #f0f4f8;
  border: none;
  padding: 6px 14px;
  border-radius: 15px;
  cursor: pointer;
  font-weight: bold;
  color: #6c757d;
  transition: var(--transition-bounce);
}

.quit-btn:hover {
  background: var(--color-primary);
  color: white;
}

/* 汉字卡片主体 */
.char-card {
  width: 100%;
  aspect-ratio: 1;
  max-width: 300px;
  background: #ffffff;
  border: 4px dashed var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: center; /* 完美垂直居中对齐 */
  align-items: center;
  cursor: pointer;
  position: relative;
  transition: border-color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.02);
  margin-bottom: 24px;
  padding: 0; /* 移去顶部填充以获得纯净居中 */
}

.char-card.hovered, .char-card.active {
  background: #f5f9ff; /* 底变极浅蓝，提高冰蓝色拼音的对比度 */
  border-color: var(--color-secondary); /* hover或点击激活时框变蓝 */
  box-shadow: 0 8px 24px rgba(142, 202, 230, 0.2);
}

.char-pinyin {
  font-size: 2.2rem;
  color: var(--color-secondary);
  font-weight: bold;
  margin-bottom: 8px;
  letter-spacing: 1px;
  height: 50px; /* 固定高度，防止隐藏显现时整体高度抖动 */
  display: flex;
  align-items: center;
  justify-content: center;
}

.char-literal {
  font-size: 7.5rem;
  font-family: var(--font-family-literal), sans-serif;
  color: var(--color-text);
  line-height: 1;
  text-shadow: 2px 2px 0px rgba(142, 202, 230, 0.1);
}

/* 今日完成时，大卡片的特殊贺卡样式 (v1.6.3) */
.char-card.finished-state {
  border: 4px solid var(--color-secondary); /* 柔和的冰蓝色实线边框 */
  background: linear-gradient(135deg, #ffffff, #f0f7ff); /* 精致的奶油白-冰蓝渐变 */
  box-shadow: 0 12px 30px rgba(142, 202, 230, 0.25);
  justify-content: center; /* 垂直居中对齐 */
  padding-top: 0; /* 清除识字卡片的顶部偏置 */
  cursor: default; /* 不再是可点击手势 */
}

.char-card.finished-state:hover {
  background: linear-gradient(135deg, #ffffff, #f0f7ff); /* 保持渐变 */
  border-color: var(--color-secondary); /* 保持蓝色实线 */
  box-shadow: 0 12px 30px rgba(142, 202, 230, 0.25); /* 保持阴影，不缩放不重载 */
  transform: none;
}

/* 贺卡状态下，对文字和 🎉 的顺序与大小进行重构 */
.char-card.finished-state .char-pinyin {
  font-size: 1.25rem; /* 字号温和舒适 */
  color: #558296; /* 深冰蓝色 */
  height: auto; /* 取消固定高度 */
  margin-top: 15px; /* 产生空隙 */
  order: 2; /* 放在下方 */
}

.char-card.finished-state .char-literal {
  font-size: 5rem; /* 减小 🎉 尺寸 */
  text-shadow: none;
  order: 1; /* 放在上方 */
  animation: float 3s ease-in-out infinite; /* 微浮动动效 */
}

/* 🎉 优雅浮动的微动效 */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
  100% { transform: translateY(0px); }
}

.voice-tip {
  position: absolute;
  bottom: 15px;
  font-size: 0.85rem;
  color: #adb5bd;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 交互大按钮 */
.control-btns {
  display: flex;
  gap: 16px;
  width: 100%;
  margin-top: 10px;
}

.btn-large {
  flex: 1;
  padding: 16px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  font-family: var(--font-family-title);
  cursor: pointer;
  transition: var(--transition-bounce);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.btn-large.btn-green {
  background: var(--color-success);
  box-shadow: 0 8px 20px rgba(6, 214, 160, 0.3);
}

.btn-large.btn-red {
  background: var(--color-primary);
  box-shadow: 0 8px 20px rgba(255, 143, 163, 0.3);
}

.btn-large.btn-yellow {
  background: var(--color-accent);
  color: #725100;
  box-shadow: 0 8px 20px rgba(255, 209, 102, 0.3);
}

.btn-large.btn-blue {
  background: var(--color-secondary);
  box-shadow: 0 8px 20px rgba(142, 202, 230, 0.3);
}

.btn-large:hover {
  transform: translateY(-4px) scale(1.02);
}

.btn-large:active {
  transform: translateY(1px);
}

/* 测试结束弹窗 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(43, 45, 66, 0.4);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 100;
  padding: 20px;
}

.modal-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  max-width: 450px;
  width: 100%;
  box-shadow: var(--shadow-soft);
  text-align: center;
  border: 6px solid #ffffff;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-title {
  font-family: var(--font-family-title);
  font-size: 1.8rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.modal-text {
  font-size: 1.1rem;
  margin-bottom: 24px;
}

/* 生字本视图 */
.notebook-container {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  border: 4px solid #ffffff;
}

.notebook-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.notebook-title {
  font-family: var(--font-family-title);
  font-size: 1.6rem;
  color: var(--color-text);
}

.notebook-empty {
  text-align: center;
  padding: 60px 20px;
  color: #6c757d;
  font-size: 1.1rem;
}

.notebook-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 16px;
}

.notebook-word-card {
  background: #f8fafc;
  border-radius: var(--radius-md);
  aspect-ratio: 1; /* 正方形 */
  border: 2px solid #e2e8f0;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  cursor: pointer;
}

.notebook-word-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-secondary);
}

.nb-pinyin {
  font-size: 1rem;
  font-weight: bold;
  color: var(--color-secondary);
}

.nb-char {
  font-size: 3rem; /* 增大汉字展示，使其在正方形中更加突出 */
  font-family: var(--font-family-literal);
  color: var(--color-text);
  line-height: 1;
}

.nb-learn-btn {
  width: 100%;
  border: none;
  background: var(--color-success);
  color: white;
  padding: 6px 0;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition-bounce);
}

.nb-learn-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 8px rgba(6, 214, 160, 0.2);
}

/* 炫彩纸屑 Canvas */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 99;
}

/* 按钮微动效 */
button {
  transition: var(--transition-bounce);
}

/* 响应式适配 */
@media(max-width: 600px) {
  body {
    padding: 10px;
  }
  .brand-title {
    font-size: 1.6rem;
  }
  .nav-tabs {
    flex-wrap: wrap;
    gap: 6px;
  }
  .tab-btn {
    font-size: 0.95rem;
    padding: 10px 8px;
    flex: 1 1 45%;
  }
  .char-literal {
    font-size: 6rem;
  }
  .btn-large {
    font-size: 1.05rem;
    padding: 14px 10px;
  }
}

/* 子字词本标签页动效 */
.sub-tab-btn {
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.sub-tab-btn:hover {
  transform: translateY(-2px) scale(1.02);
  filter: brightness(1.03);
}

/* 小红花点击/认会时的弹性变大特效 */
.pop-animation {
  animation: popScale 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popScale {
  0% { transform: scale(1); }
  50% { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* 已学完组徽章样式 */
.finished-badge {
  background: rgba(6, 214, 160, 0.12);
  color: var(--color-success);
  font-weight: bold;
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}