:root {
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --primary-light: #cffafe;
  --yellow: #fbbf24;
  --yellow-dark: #d97706;
  --yellow-light: #fef3c7;
  --green: #10b981;
  --green-dark: #059669;
  --green-light: #d1fae5;
  --coral: #f43f5e;
  --coral-light: #ffe4e6;
  --purple: #8b5cf6;
  --purple-light: #ede9fe;
  --blue: #3b82f6;
  --blue-light: #dbeafe;
  --bg-gradient: linear-gradient(135deg, #e0f2fe 0%, #fef3c7 50%, #dcfce7 100%);
  --card-bg: #ffffff;
  --ink: #1e293b;
  --ink-light: #475569;
  --border-thick: 3px solid #cbd5e1;
}

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

body {
  font-family: "Chalkboard SE", "Comic Sans MS", "PingFang TC", "Noto Sans TC", system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  user-select: none;
}

/* 🎈 Top Classroom Navigation Bar (Candy Style) */
.classroom-header {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 3px solid #fed7aa;
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 3px 12px rgba(251, 146, 60, 0.1);
  z-index: 50;
  flex-wrap: wrap;
  gap: 8px;
}

.lesson-info {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.lesson-day-badge {
  background: #f59e0b;
  color: white;
  padding: 4px 10px;
  border-radius: 9999px;
  font-weight: 900;
  font-size: 0.85rem;
  box-shadow: 0 3px 0 #b45309;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.lesson-title-text {
  font-size: 1.1rem;
  font-weight: 900;
  color: #0f172a;
  letter-spacing: -0.01em;
  white-space: nowrap;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.classroom-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
  flex-wrap: wrap;
  flex: 1;
}

/* 🦁 4 Student Star Widget - Anchored to Far Right, Vertical Dropdown (上下收合，完全不影響原按鈕排版) */
.students-star-widget {
  position: relative;
  display: inline-flex;
  align-items: center;
  z-index: 100;
  margin-left: auto;
}

.star-toggle-btn {
  background: #f59e0b;
  color: white;
  border: 2px solid #d97706;
  border-radius: 9999px;
  padding: 5px 11px;
  font-size: 0.84rem;
  font-weight: 900;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 3px 0 #b45309;
  transition: all 0.15s ease;
  white-space: nowrap;
  user-select: none;
}

.star-toggle-btn:hover {
  background: #d97706;
  transform: translateY(-1px);
  box-shadow: 0 4px 0 #b45309;
}

.star-toggle-btn:active {
  transform: translateY(2px);
  box-shadow: none;
}

.star-total-badge {
  background: #fef3c7;
  color: #78350f;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 900;
  border: 1px solid #fde68a;
  line-height: 1.2;
}

.toggle-icon {
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.16);
  padding: 2px 7px;
  border-radius: 9999px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
}

/* 🌟 Vertical Floating Panel: 下拉展開卡片，懸浮於畫面右上角，完全不佔橫向版面 */
.students-bar {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 295px;
  background: #ffffff;
  border: 2.5px solid #f59e0b;
  border-radius: 18px;
  padding: 12px;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.2), 0 4px 12px rgba(245, 158, 11, 0.25);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
  transform-origin: top right;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* 學生星星收合狀態 (向上垂直收合隱藏) */
.students-star-widget.collapsed .students-bar {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px) scale(0.96);
}

/* 面板頂部小標題與收合快捷紐 */
.students-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px 2px 8px 2px;
  border-bottom: 1.5px dashed #fed7aa;
  font-size: 0.82rem;
  font-weight: 900;
  color: #9a3412;
}

.cloud-sync-badge {
  font-size: 0.72rem;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  padding: 1px 7px;
  border-radius: 999px;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.2px;
  transition: all 0.2s ease;
}

.star-panel-close-btn {
  background: #fee2e2;
  border: 1px solid #fca5a5;
  color: #991b1b;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.15s;
}

.star-panel-close-btn:hover {
  background: #fecaca;
  transform: scale(1.05);
}

/* 面板內四位學生垂直條列 */
.students-bar-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.student-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  padding: 7px 12px;
  border-radius: 14px;
  box-shadow: 0 2px 0 #e2e8f0;
  transition: all 0.15s ease;
}

.student-pill:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

.student-pill-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pill-avatar {
  font-size: 1.25rem;
  line-height: 1;
}

.pill-name-tag {
  font-size: 1.25rem;
  font-weight: 900;
  color: #0f172a;
  line-height: 1;
  margin-left: 2px;
}

.student-pill-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pill-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 900;
  cursor: pointer;
  transition: all 0.1s;
  line-height: 1;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
  user-select: none;
}

.pill-btn-minus {
  background: #ffffff;
  color: #dc2626;
  border: 1.5px solid #fca5a5;
}

.pill-btn-minus:hover {
  background: #fee2e2;
  border-color: #dc2626;
  transform: scale(1.1);
}

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

.pill-btn-plus {
  background: #f59e0b;
  color: #ffffff;
  border: 1.5px solid #d97706;
}

.pill-btn-plus:hover {
  background: #d97706;
  transform: scale(1.1);
}

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

.pill-stars {
  color: #78350f;
  background: #fef3c7;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.95rem;
  font-weight: 900;
  border: 1.5px solid #fde68a;
  min-width: 58px;
  text-align: center;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  box-sizing: border-box;
  line-height: 1;
}

/* 面板底部快捷按鈕：全員+1 / 重設歸零 */
.students-bar-footer {
  display: flex;
  gap: 6px;
  padding-top: 8px;
  border-top: 1.5px dashed #fed7aa;
  margin-top: 2px;
}

.star-panel-btn-all {
  flex: 1;
  background: #fef3c7;
  border: 1.5px solid #f59e0b;
  color: #92400e;
  font-size: 0.82rem;
  font-weight: 900;
  padding: 5px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.star-panel-btn-all:hover {
  background: #fde68a;
  transform: translateY(-1px);
}

.star-panel-btn-reset {
  background: #fff1f2;
  border: 1.5px solid #fecdd3;
  color: #be123c;
  font-size: 0.82rem;
  font-weight: 900;
  padding: 5px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.star-panel-btn-reset:hover {
  background: #ffe4e6;
  transform: translateY(-1px);
}

/* Chunky 3D Buttons */
.c-btn {
  background: white;
  color: var(--ink);
  border: 2.5px solid #cbd5e1;
  padding: 5px 10px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 3px 0 #94a3b8;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.c-btn:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #94a3b8;
}

.c-btn:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #94a3b8;
}

.c-icon-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--ink);
  flex-shrink: 0;
}

.c-icon-btn svg {
  display: block;
}

.c-btn-primary {
  background: #06b6d4;
  color: white;
  border-color: #0891b2;
  box-shadow: 0 4px 0 #0e7490;
}

.c-btn-primary:hover {
  background: #0891b2;
  box-shadow: 0 6px 0 #0e7490;
}

.c-btn-accent {
  background: #f59e0b;
  color: white;
  border-color: #d97706;
  box-shadow: 0 4px 0 #b45309;
}

.c-btn-accent:hover {
  background: #d97706;
}

.date-selector-select {
  background: white;
  color: var(--ink);
  border: 2.5px solid #f59e0b;
  padding: 5px 8px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 3px 0 #d97706;
  outline: none;
  max-width: 175px;
  text-overflow: ellipsis;
}

/* 🎪 Main Classroom Viewport & Slide Canvas */
.slide-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  position: relative;
  min-height: 0;
  overflow-y: auto;
}

.slide-canvas {
  width: min(1200px, 98vw);
  height: min(720px, calc(100vh - 85px));
  min-height: 420px;
  background: #ffffff;
  color: var(--ink);
  border-radius: 28px;
  border: 4px solid #fbbf24;
  box-shadow: 0 12px 28px rgba(245, 158, 11, 0.15), 0 0 0 6px rgba(255, 255, 255, 0.8);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  transition: transform 0.3s ease;
}

/* 🎨 Slide Top Step Bar (Toy Block Tabs) */
.slide-top {
  padding: 8px 18px;
  border-bottom: 3px solid #fef3c7;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fffdf5;
  flex-shrink: 0;
}

.slide-step-indicator {
  display: flex;
  gap: 10px;
}

.step-dot {
  padding: 5px 14px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 900;
  background: #f1f5f9;
  color: #64748b;
  cursor: pointer;
  border: 2px solid #cbd5e1;
  box-shadow: 0 3px 0 #94a3b8;
  transition: all 0.15s;
}

.step-dot:hover {
  transform: translateY(-2px);
}

.step-dot:active {
  transform: translateY(2px);
  box-shadow: none;
}

.step-dot.active {
  background: #06b6d4;
  color: white;
  border-color: #0891b2;
  box-shadow: 0 3px 0 #0e7490;
}

.slide-time-tag {
  font-weight: 900;
  color: #b45309;
  font-size: 0.88rem;
  background: #fef3c7;
  border: 2px solid #fde68a;
  padding: 2px 10px;
  border-radius: 9999px;
}

/* 🎠 Slide Content Area - 頂部對齊與充足邊距，絕不切到頂部標題 */
.slide-content {
  flex: 1;
  min-height: 0;
  padding: 12px 20px 16px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start !important;
  align-items: center;
  text-align: center;
  overflow-y: auto;
  overflow-x: hidden;
  background: #fafaf9;
  box-sizing: border-box;
  width: 100%;
}

.slide-title {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 900;
  color: #0f172a;
  margin-top: 2px;
  margin-bottom: 6px;
  line-height: 1.25;
}

.slide-subtitle {
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  color: #475569;
  max-width: 850px;
  margin-top: 0;
  margin-bottom: 10px;
  line-height: 1.35;
  font-weight: 700;
}

/* Slide Bottom Controls */
.slide-bottom {
  padding: 6px 20px;
  border-top: 2px solid #fef3c7;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #fffdf5;
  flex-shrink: 0;
}

.nav-hint {
  font-size: 0.82rem;
  font-weight: 800;
  color: #94a3b8;
  letter-spacing: 0.2px;
}

/* Giant Floating Arrow Buttons */
.slide-nav-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: white;
  border: 3.5px solid #f59e0b;
  color: #f59e0b;
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.25), 0 3px 0 #d97706;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.15s;
  z-index: 20;
}

.slide-nav-btn:hover {
  background: #fbbf24;
  color: white;
  transform: translateY(-50%) scale(1.1);
}

.slide-nav-btn:active {
  transform: translateY(-50%) scale(0.95);
  box-shadow: 0 2px 0 #d97706;
}

.slide-prev { left: 18px; }
.slide-next { right: 18px; }

/* ----------------------------------------------------
   📖 Slide 1: Picture Book Story Island (故事島)
---------------------------------------------------- */
.story-wrapper {
  width: 100%;
  max-width: 980px;
  background: #ffffff;
  border: 4px solid #fdba74;
  border-radius: 28px;
  padding: 24px 32px;
  text-align: left;
  box-shadow: 0 12px 24px rgba(251, 146, 60, 0.12);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  transition: all 0.3s ease;
}

.story-wrapper.story-speaking-glow {
  border-color: #f59e0b;
  box-shadow: 0 0 0 8px rgba(245, 158, 11, 0.25), 0 16px 32px rgba(251, 146, 60, 0.25);
  background: #fffdfa;
}

.story-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 3px dashed #fed7aa;
  padding-bottom: 12px;
  flex-wrap: wrap;
}

.tts-btn {
  background: #fef08a;
  color: #854d0e;
  border: 2px solid #facc15;
  box-shadow: 0 3px 0 #eab308;
  font-size: 0.95rem;
  font-weight: 900;
  padding: 6px 16px;
  border-radius: 9999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  transition: all 0.15s;
}

.tts-btn:hover {
  background: #fde047;
  transform: translateY(-2px);
  box-shadow: 0 5px 0 #eab308;
}

.tts-btn:active {
  transform: translateY(2px);
  box-shadow: none;
}

.tts-btn.speaking {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
  box-shadow: 0 3px 0 #f87171;
  animation: pulseSpeaking 1.2s infinite;
}

@keyframes pulseSpeaking {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.story-badge {
  background: #fef3c7;
  color: #b45309;
  font-size: 0.95rem;
  font-weight: 900;
  padding: 6px 14px;
  border-radius: 9999px;
  border: 2px solid #fde68a;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.story-title {
  font-size: 1.7rem;
  font-weight: 900;
  color: #7c2d12;
}

/* 🎯 字嗨注音字型 (Bpmf Zihi Kai Std · 右側直排教育部標準楷體注音) */
.zhuyin-mode {
  font-family: "Bpmf Zihi Kai Std", "Bpmf Iansui", "BiauKai", "DFKai-SB", serif !important;
  letter-spacing: 0.04em;
}

.plain-text-mode {
  font-family: inherit;
  letter-spacing: normal;
}

/* 相容既有 ruby 標籤若被使用 */
ruby {
  font-size: inherit;
  margin: 0 1px;
}

rt {
  font-size: 0.5em;
  font-weight: 900;
  color: #b45309;
}

.story-body {
  font-size: 1.42rem;
  line-height: 2.6 !important;
  color: #334155;
  white-space: normal;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 14px;
  transition: all 0.2s ease;
}

.story-body:hover {
  background: rgba(254, 243, 199, 0.45);
  box-shadow: inset 0 0 0 2px #fde68a;
}

.story-question-box {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border: 3px solid #10b981;
  border-radius: 18px;
  padding: 16px 22px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.1);
}

.story-question-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.story-question-title {
  font-size: 1rem;
  font-weight: 900;
  color: #047857;
  margin-bottom: 4px;
}

.story-question-text {
  font-size: 1.25rem;
  font-weight: 900;
  color: #064e3b;
  line-height: 1.45;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.story-question-text:hover {
  background: rgba(16, 185, 129, 0.15);
}

/* ----------------------------------------------------
   💡 Slide 2: Superpower Cards (超能力卡片)
---------------------------------------------------- */
.visual-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.visual-step {
  background: white;
  padding: 24px 16px;
  border-radius: 24px;
  border: 4px solid #67e8f9;
  box-shadow: 0 10px 0 #06b6d4;
  transition: all 0.2s;
}

.visual-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 0 #06b6d4;
}

.step-num {
  width: 44px;
  height: 44px;
  background: #f59e0b;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.3rem;
  margin: 0 auto 10px;
  box-shadow: 0 3px 0 #b45309;
}

.step-text {
  font-size: 1.3rem;
  font-weight: 900;
  color: #0f172a;
}

/* ----------------------------------------------------
   🎮 Slide 3: Carnival Playground Games
---------------------------------------------------- */
.game-container {
  width: 100%;
  max-width: 950px;
  background: #ffffff;
  border-radius: 30px;
  padding: 28px;
  border: 4px solid #38bdf8;
  box-shadow: 0 12px 24px rgba(56, 189, 248, 0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

/* Thermometer Game */
.thermo-stage {
  display: flex;
  gap: 36px;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.thermo-tube {
  width: 56px;
  height: 250px;
  background: #f1f5f9;
  border-radius: 28px;
  position: relative;
  border: 4px solid #64748b;
  box-shadow: inset 0 4px 8px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column-reverse;
  padding: 6px;
  overflow: hidden;
}

.thermo-fluid {
  width: 100%;
  height: 20%;
  background: #10b981;
  border-radius: 20px;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.thermo-levels {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.thermo-btn {
  padding: 12px 22px;
  border-radius: 16px;
  border: 3px solid #cbd5e1;
  background: white;
  font-size: 1.15rem;
  font-weight: 900;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 0 #94a3b8;
  transition: all 0.15s;
}

.thermo-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #94a3b8;
}

.thermo-btn:active {
  transform: translateY(3px);
  box-shadow: none;
}

.avatar-display {
  font-size: 6rem;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  filter: drop-shadow(0 6px 12px rgba(0,0,0,0.15));
}

/* Turtle Breathing Circle */
.breathing-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.breathe-circle {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, #38bdf8 0%, #0284c7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.7rem;
  font-weight: 900;
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.35);
  border: 6px solid #e0f2fe;
  transition: all 3s ease-in-out;
}

.breathe-circle.expanding {
  transform: scale(1.6);
  background: radial-gradient(circle, #fbbf24 0%, #d97706 100%);
  box-shadow: 0 15px 45px rgba(217, 119, 6, 0.45);
}

.breathe-circle.shrinking {
  transform: scale(0.9);
  background: radial-gradient(circle, #34d399 0%, #059669 100%);
}

/* Radar Target */
.radar-screen {
  width: 340px;
  height: 250px;
  background: #f0fdf4;
  border-radius: 24px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 4px solid #10b981;
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.15);
}

.radar-target {
  width: 76px;
  height: 76px;
  border: 4px dashed #f59e0b;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f59e0b;
  font-size: 2rem;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(254, 243, 199, 0.7);
}

.radar-target.locked {
  border: 5px solid #10b981;
  background: rgba(16, 185, 129, 0.3);
  color: #10b981;
  transform: scale(1.2);
}

/* ----------------------------------------------------
   🏆 Slide 4: Four Kids Star Scoreboard (榮譽頒獎台)
---------------------------------------------------- */
.student-scoreboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  width: 100%;
  max-width: 960px;
  margin: 8px auto 14px;
}

.student-score-card {
  background: white;
  border: 3.5px solid #1e293b;
  border-radius: 22px;
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  box-shadow: 0 6px 0 #1e293b;
  position: relative;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.student-score-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 9px 0 #1e293b;
}

/* 🎯 Slide 4 清楚學生姓名：無框框、純淨醒目大字 */
.card-name-plate {
  font-size: 2.3rem;
  font-weight: 900;
  color: #0f172a;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0 4px;
  letter-spacing: 0.05em;
  box-shadow: none;
  line-height: 1;
}

.card-star-display {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #fef9c3;
  border: 2px solid #fde047;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 1.25rem;
  font-weight: 900;
  color: #854d0e;
  box-shadow: 0 3px 0 #facc15;
}

.card-actions {
  display: flex;
  gap: 6px;
  width: 100%;
  margin-top: 2px;
}
  margin-top: 6px;
}

.btn-add-star {
  flex: 1.4;
  background: #fbbf24;
  color: #78350f;
  border: 3px solid #f59e0b;
  border-radius: 14px;
  padding: 10px;
  font-weight: 900;
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: 0 4px 0 #d97706;
  transition: all 0.15s;
}

.btn-add-star:hover {
  background: #f59e0b;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #d97706;
}

.btn-add-star:active {
  transform: translateY(3px);
  box-shadow: none;
}

.btn-minus-star {
  flex: 1;
  background: #fee2e2;
  color: #991b1b;
  border: 3px solid #fca5a5;
  border-radius: 14px;
  padding: 10px 8px;
  font-weight: 900;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 0 #f87171;
  transition: all 0.15s;
}

.btn-minus-star:hover {
  background: #fecaca;
  transform: translateY(-2px);
}

.btn-minus-star:active {
  transform: translateY(3px);
  box-shadow: none;
}

/* Puzzle Blocks for I-Message */
.puzzle-board {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.puzzle-block {
  padding: 18px 28px;
  border-radius: 18px;
  font-size: 1.3rem;
  font-weight: 900;
  cursor: pointer;
  transition: all 0.15s;
  border: 3px solid;
  box-shadow: 0 6px 0 rgba(0,0,0,0.1);
}

.puzzle-block:hover {
  transform: translateY(-3px);
}

.puzzle-block:active {
  transform: translateY(3px);
  box-shadow: none;
}

.block-blue { background: #dbeafe; color: #1e40af; border-color: #60a5fa; }
.block-yellow { background: #fef9c3; color: #854d0e; border-color: #facc15; }
.block-green { background: #dcfce7; color: #166534; border-color: #4ade80; }

/* 🖥️ 擬真滿版全螢幕模式 (適用於 iPad、Safari、不支援全螢幕 API 或 Google 協作平台嵌入) */
body.simulated-fullscreen {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 999999 !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: hidden !important;
  background: var(--bg) !important;
  display: flex !important;
  flex-direction: column !important;
}

body.simulated-fullscreen .slide-viewport {
  flex: 1 !important;
  height: calc(100vh - 65px) !important;
  max-height: calc(100vh - 65px) !important;
}

body.simulated-fullscreen .slide-canvas {
  max-height: calc(100vh - 85px) !important;
}

/* 🎭 角色大劇場專用樣式 */
.roleplay-theater-wrapper {
  width: 100%;
  max-width: 1050px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rp-header-banner {
  background: #ffffff;
  border: 2px solid #e2e8f0;
  border-radius: 18px;
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.rp-badge {
  background: #ede9fe;
  color: #6d28d9;
  font-size: 0.95rem;
  font-weight: 900;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1.5px solid #c4b5fd;
}

.rp-scenario-text {
  font-size: 1.05rem;
  color: #1e293b;
  line-height: 1.6;
  margin-top: 4px;
}

.rp-controls-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.rp-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 1200px) {
  .lesson-title-text {
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .date-selector-select {
    max-width: 180px;
  }
}

@media (max-width: 990px) {
  .lesson-title-text {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .date-selector-select {
    max-width: 150px;
  }
  .c-btn {
    padding: 5px 10px;
    font-size: 0.82rem;
  }
  .star-toggle-btn {
    padding: 5px 11px;
    font-size: 0.84rem;
  }
}

@media (max-width: 860px) {
  .rp-grid {
    grid-template-columns: 1fr;
  }
}

.rp-card {
  background: #ffffff;
  border: 2px solid #e2e8f0;
  border-top: 6px solid #3b82f6;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}

.rp-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.rp-card.rp-card-speaking {
  border-color: #f59e0b !important;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.35), 0 8px 20px rgba(0,0,0,0.12) !important;
  transform: scale(1.02);
}

.rp-card-header {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.rp-student-tag {
  font-size: 0.95rem;
  font-weight: 900;
  padding: 3px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.rp-role-title {
  font-size: 1.05rem;
  font-weight: 900;
  flex: 1;
}

.rp-card-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.rp-section-box {
  border-radius: 12px;
  padding: 10px 12px;
}

.rp-action-box {
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
}

.rp-label {
  font-size: 0.82rem;
  font-weight: 900;
  margin-bottom: 4px;
}

.rp-action-label {
  color: #475569;
}

.rp-action-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #1e293b;
  font-weight: 700;
}

.rp-dialogue-box {
  background: #fefce8;
  border: 1.5px solid #fef08a;
}

.rp-dialogue-label {
  color: #854d0e;
}

.rp-speech-bubble {
  background: #ffffff;
  border: 2px solid #facc15;
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: #0f172a;
  font-weight: 800;
  box-shadow: 0 2px 4px rgba(0,0,0,0.03);
}

.role-tts-btn {
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  color: #b45309;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s;
}

.role-tts-btn:hover {
  background: #fef3c7;
  transform: translateY(-1px);
}

.rp-tip-box {
  font-size: 0.82rem;
  color: #64748b;
  line-height: 1.5;
  background: #f1f5f9;
  padding: 8px 10px;
  border-radius: 8px;
  margin-top: auto;
}

/* 🌟 童趣繪本風紙膠帶與慶祝特效 */
.washi-tape-strip {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-1deg);
  width: 160px;
  height: 26px;
  background: rgba(254, 240, 138, 0.95);
  border: 1px dashed rgba(202, 138, 4, 0.45);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
  clip-path: polygon(2% 0%, 98% 2%, 99% 98%, 1% 97%);
  z-index: 100;
  pointer-events: none;
}
.washi-tape-yellow {
  background: rgba(254, 240, 138, 0.95);
  border-color: rgba(202, 138, 4, 0.45);
}