/* 数学乐园 - 一年级数学小游戏样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --sky: linear-gradient(160deg, #7ec8ff 0%, #b6e2ff 55%, #e7f7ff 100%);
  --card: #ffffff;
  --ink: #2b3a55;
  --pink: #ff88b0;
  --pink-dark: #f05a8a;
  --yellow: #ffc857;
  --green: #6bc56b;
  --blue: #4aa8ff;
  --purple: #9a7bdd;
  --radius: 24px;
}

html, body { height: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: var(--sky);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app { position: relative; width: 100%; max-width: 620px; margin: 0 auto; min-height: 100vh; padding: 18px; }

.screen { display: none; animation: fadeUp 0.4s ease; }
.screen.is-active { display: block; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* 背景装饰 */
.cloud { position: fixed; font-size: 56px; opacity: 0.55; z-index: 0; animation: drift 14s ease-in-out infinite; }
.cloud-1 { top: 6%; left: -8px; }
.cloud-2 { top: 40%; right: -12px; animation-delay: -6s; font-size: 44px; }
@keyframes drift { 0%,100% { transform: translateY(0); } 50% { transform: translateY(16px); } }

/* 首页 */
#screen-home { text-align: center; padding-top: 28px; position: relative; z-index: 1; }

.game-title {
  font-size: 46px;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 3px 0 rgba(240,90,138,0.35), 0 6px 16px rgba(0,0,0,0.15);
  letter-spacing: 2px;
}
.game-subtitle { margin-top: 8px; font-size: 17px; color: #fdffff; font-weight: 600; text-shadow: 0 1px 3px rgba(0,0,0,0.12); }

.mascot { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 20px auto; max-width: 320px; }
.mascot-face { font-size: 74px; animation: bounce 2s ease-in-out infinite; display: inline-block; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.speech-bubble {
  background: #fff; border-radius: 18px 18px 18px 4px; padding: 12px 16px;
  font-size: 15px; font-weight: 600; box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

/* 板块选择 */
.board-list { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-top: 8px; }
.board-card {
  background: #fff; border-radius: var(--radius); padding: 18px 8px 14px; text-align: center;
  box-shadow: 0 8px 22px rgba(0,80,140,0.16); cursor: pointer; transition: transform 0.15s ease;
  border: 4px solid transparent;
}
.board-card:active { transform: scale(0.94); }
.board-card .bd-emoji { font-size: 46px; display: block; }
.board-card .bd-name { font-size: 19px; font-weight: 900; margin-top: 6px; display: block; }
.board-card .bd-desc { font-size: 12px; color: #7a849b; margin-top: 4px; display: block; line-height: 1.35; }
.board-card.chinese { border-color: #ff6b6b; }
.board-card.math { border-color: var(--blue); }
.board-card.english { border-color: var(--green); }

.even-columns { grid-template-columns: 1fr 1fr; }
.even-columns .full { grid-column: 1 / -1; }

/* 板块关卡列表页 */
.board-topbar { display: flex; align-items: center; gap: 12px; margin: 6px 0 18px; }
.board-title { color: #fff; font-size: 26px; font-weight: 900; text-shadow: 0 2px 4px rgba(0,0,0,0.15); }

.level-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 6px auto; max-width: 460px; }

.level-card {
  background: #fff; border-radius: var(--radius); padding: 18px 12px 16px;
  box-shadow: 0 8px 22px rgba(0,80,140,0.16); cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease; border: 4px solid transparent;
}
.level-card:active { transform: scale(0.95); }
.level-card .lv-emoji { font-size: 42px; display: block; }
.level-card .lv-name { font-size: 16px; font-weight: 800; margin-top: 6px; display: block; }
.level-card .lv-desc { font-size: 12px; color: #7a849b; margin-top: 4px; display: block; line-height: 1.35; }
.level-card.full { grid-column: 1 / -1; }
.level-card.score { border-color: var(--pink); }
.level-card.add { border-color: var(--blue); }
.level-card.sub { border-color: var(--green); }
.level-card.carry { border-color: var(--yellow); }
.level-card.compare { border-color: var(--purple); }
.level-card.splitt { border-color: var(--pink); }
.level-card.mul { border-color: #ff8f5c; }
.level-card.div { border-color: #57c7e0; }
.level-card.mixed { border-color: #ff5cd0; }

/* 语文关卡配色 */
.level-card.pinyin { border-color: #ff6b6b; }
.level-card.zishi { border-color: #ff8f5c; }
.level-card.ciyu { border-color: #b062d8; }

/* 英语关卡配色 */
.level-card.letter { border-color: #4aa8ff; }
.level-card.word { border-color: #6bc56b; }
.level-card.simple { border-color: #ffc857; }

.tip { margin-top: 22px; font-size: 13px; color: rgba(255,255,255,0.92); text-shadow: 0 1px 2px rgba(0,0,0,0.15); }

/* 游戏界面 */
#screen-game { position: relative; z-index: 1; padding-top: 4px; }

.game-topbar { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  background: #fff; border: none; width: 46px; height: 46px; border-radius: 50%;
  font-size: 22px; cursor: pointer; box-shadow: 0 4px 10px rgba(0,0,0,0.12); flex-shrink: 0;
}
.progress-wrap { flex: 1; display: flex; align-items: center; gap: 8px; }
.progress-bar { flex: 1; height: 14px; background: rgba(255,255,255,0.55); border-radius: 20px; overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, #ffd34d, #ff9a3d); border-radius: 20px; transition: width 0.4s ease; }
.progress-text { color: #fff; font-weight: 800; font-size: 15px; text-shadow: 0 1px 2px rgba(0,0,0,0.15); min-width: 40px; text-align: center; }
.stars { font-size: 14px; letter-spacing: 1px; }

.level-badge {
  background: #fff; border-radius: 40px; padding: 6px 16px; font-size: 14px; font-weight: 700;
  margin: 12px auto; width: max-content; box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.question-box {
  background: #fff; border-radius: var(--radius); padding: 30px 18px;
  text-align: center; box-shadow: 0 10px 26px rgba(0,80,140,0.14); margin-top: 6px;
}
.question-label { font-size: 14px; color: #8a94a9; font-weight: 600; }
.question-emoji { font-size: 40px; display: block; margin: 6px 0; }
.question-main { font-size: 44px; font-weight: 900; letter-spacing: 3px; margin-top: 4px; }
.question-compare { font-size: 40px; font-weight: 900; letter-spacing: 2px; }
/* 运算符：与数字协调放大 */
.op { font-size: 34px; font-weight: 800; color: var(--pink-dark); margin: 0 6px; vertical-align: middle; }
.question-main-wrap { line-height: 1.6; display: inline-block; }
.question-small { font-size: 15px; color: #6b7690; margin-top: 8px; font-weight: 600; }
.underscore { display: inline-block; border-bottom: 3px solid #ff9a3d; min-width: 1.3em; margin: 0 2px; border-radius: 2px; }

/* 点读按钮 */
.read-btn {
  display: inline-block; margin: 14px auto 0; background: linear-gradient(135deg, #4aa8ff, #7cc4ff);
  color: #fff; border: none; border-radius: 30px; padding: 10px 26px; font-size: 18px; font-weight: 800;
  cursor: pointer; box-shadow: 0 4px 12px rgba(74,168,255,0.4); letter-spacing: 1px;
}
.read-btn:active { transform: scale(0.95); }
.opt-sound {
  display: block; font-size: 18px; margin-top: 6px; cursor: pointer; opacity: 0.85;
  background: #eaf4ff; border-radius: 14px; padding: 3px 10px; width: max-content; margin-left: auto; margin-right: auto;
}
.option:hover .opt-sound { opacity: 1; }

.options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 20px; }
.option {
  background: #fff; border-radius: 22px; padding: 20px 8px; font-size: 34px; font-weight: 800;
  cursor: pointer; box-shadow: 0 6px 16px rgba(0,0,0,0.10); transition: transform 0.12s ease;
  border: 4px solid transparent;
}
/* 语文/英语文字类选项 */
.option.text { font-size: 22px; letter-spacing: 1px; padding: 18px 6px; }
.option.text .opt-emoji { font-size: 26px; display: block; margin-bottom: 4px; }
.option.text .opt-sound { font-size: 15px; color: #8a94a9; font-weight: 600; margin-top: 3px; }
.option:active { transform: scale(0.92); }
.option.correct { background: #dbf4db; border-color: var(--green); animation: pop 0.4s ease; }
.option.wrong { background: #ffe1e1; border-color: #f26666; animation: shake 0.4s ease; }
.option.disabled { pointer-events: none; }

@keyframes pop { 0%{transform:scale(1);} 50%{transform:scale(1.12);} 100%{transform:scale(1);} }
@keyframes shake { 0%,100%{transform:translateX(0);} 25%{transform:translateX(-6px);} 75%{transform:translateX(6px);} }

.feedback { text-align: center; min-height: 44px; margin-top: 18px; font-size: 18px; font-weight: 800; }
.feedback.good { color: var(--green); }
.feedback.bad { color: #f26666; }

.cta-btn {
  display: block; margin: 6px auto 0; background: linear-gradient(135deg, #ff9a3d, #ff6b6b);
  color: #fff; border: none; border-radius: 40px; padding: 14px 40px; font-size: 18px; font-weight: 800;
  cursor: pointer; box-shadow: 0 6px 16px rgba(255,107,107,0.4);
}
.cta-btn.hidden { display: none; }
.cta-btn.secondary { background: linear-gradient(135deg, #4aa8ff, #7cc4ff); box-shadow: 0 6px 16px rgba(74,168,255,0.4); margin-top: 12px; }

/* 结束界面 */
#screen-end { position: relative; z-index: 1; display: none; }
#screen-end.is-active { display: block; }
.result-card {
  background: #fff; border-radius: 30px; text-align: center; padding: 34px 20px;
  box-shadow: 0 14px 34px rgba(0,80,140,0.18); margin-top: 16px;
}
.rainbow { font-size: 56px; }
.result-title { font-size: 34px; font-weight: 900; margin-top: 6px; }
.big-medal { font-size: 90px; animation: spin 1.4s ease; }
@keyframes spin { from { transform: rotate(-40deg) scale(0.4); opacity: 0; } to { transform: none; opacity: 1; } }
.result-score { font-size: 22px; font-weight: 800; margin-top: 14px; }
.result-sub { color: #7a849b; margin-top: 8px; font-size: 15px; }
.result-actions { margin-top: 22px; }

@media (max-width: 460px) {
  .game-title { font-size: 38px; }
  .question-main { font-size: 36px; }
  .op { font-size: 28px; margin: 0 4px; }
  .level-card .lv-emoji { font-size: 36px; }
}