@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300..700&display=swap');

:root {
  --font-family: 'Fredoka', sans-serif;
  --bg-sky: linear-gradient(180deg, #6ec6ff 0%, #a4e2fc 60%, #cceeff 100%);
  --bg-grass: linear-gradient(180deg, #6cbe58 0%, #4a9e36 100%);
  --color-cloud: #ffffff;
  --color-text-dark: #2c3e50;
  --color-text-light: #ffffff;
  --color-primary: #ff7675;
  --color-success: #2ecc71;
  --color-danger: #e74c3c;
  --color-warning: #f1c40f;
  
  --shadow-block: 0 8px 0 #d35400;
  --shadow-block-hover: 0 4px 0 #d35400;
  
  --shadow-cloud: 0 15px 30px rgba(0, 0, 0, 0.08), inset 0 -8px 0 rgba(0, 0, 0, 0.05);
  --shadow-panel: 0 20px 45px rgba(0, 0, 0, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

body {
  font-family: var(--font-family);
  background: var(--bg-sky);
  min-height: 100vh;
  overflow: hidden;
  color: var(--color-text-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* 漂浮背景雲朵 */
.bg-cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.65);
  border-radius: 100px;
  filter: blur(4px);
  z-index: 0;
  pointer-events: none;
  animation: floatBG 30s linear infinite;
}

.bg-cloud::before, .bg-cloud::after {
  content: '';
  position: absolute;
  background: rgba(255, 255, 255, 0.65);
  border-radius: 50%;
}

.bg-cloud-1 {
  width: 180px;
  height: 60px;
  top: 15%;
  left: -200px;
  animation-duration: 40s;
}
.bg-cloud-1::before { width: 80px; height: 80px; top: -40px; left: 30px; }
.bg-cloud-1::after { width: 100px; height: 100px; top: -50px; left: 80px; }

.bg-cloud-2 {
  width: 250px;
  height: 80px;
  top: 45%;
  left: -300px;
  animation-duration: 55s;
  animation-delay: -10s;
}
.bg-cloud-2::before { width: 110px; height: 110px; top: -55px; left: 40px; }
.bg-cloud-2::after { width: 130px; height: 130px; top: -65px; left: 110px; }

.bg-cloud-3 {
  width: 150px;
  height: 50px;
  top: 70%;
  left: -200px;
  animation-duration: 35s;
  animation-delay: -20s;
}
.bg-cloud-3::before { width: 70px; height: 70px; top: -35px; left: 25px; }
.bg-cloud-3::after { width: 80px; height: 80px; top: -40px; left: 65px; }

@keyframes floatBG {
  0% { transform: translateX(0); left: -300px; }
  100% { transform: translateX(calc(100vw + 600px)); left: -300px; }
}

/* 遊戲容器 */
.app-container {
  width: 100%;
  max-width: 900px;
  height: 100vh;
  max-height: 760px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  z-index: 10;
  padding: 20px;
}

/* 頂部 HUD */
.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  border: 3px solid #ffffff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  animation: slideDown 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.hud-left, .hud-right, .hud-center {
  display: flex;
  align-items: center;
  gap: 15px;
}

.hud-item {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.heart {
  color: #ff4757;
  font-size: 1.6rem;
  filter: drop-shadow(0 2px 4px rgba(255, 71, 87, 0.2));
  animation: heartPulse 1.5s infinite alternate;
}

.heart.lost {
  color: #ccd1d9;
  animation: none;
  transform: scale(0.9);
  opacity: 0.6;
}

.btn-icon {
  background: #ffffff;
  border: 3px solid #e2e8f0;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: 0 4px 0 #cbd5e1;
  transition: all 0.1s ease;
}

.btn-icon:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #cbd5e1;
}

.btn-icon:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #cbd5e1;
}

/* 關卡選擇畫面 */
.screen {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.hidden {
  display: none !important;
}

#lobby-screen {
  animation: fadeIn 0.5s ease-out;
}

.game-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: #2e86de;
  text-shadow: 4px 4px 0px #ffffff, 8px 8px 20px rgba(46, 134, 222, 0.2);
  margin-bottom: 5px;
  text-align: center;
  letter-spacing: 2px;
}

.game-subtitle {
  font-size: 1.2rem;
  color: #576574;
  margin-bottom: 40px;
  font-weight: 500;
}

.category-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 25px;
  width: 100%;
  max-width: 800px;
  padding: 10px;
}

.category-card {
  background: rgba(255, 255, 255, 0.9);
  border: 4px solid #ffffff;
  border-radius: 28px;
  padding: 30px 20px;
  cursor: pointer;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
}

.card-vowels_single::before { background: linear-gradient(90deg, #ff7675, #ffb8b8); }
.card-vowels_double::before { background: linear-gradient(90deg, #0984e3, #74b9ff); }
.card-consonants::before { background: linear-gradient(90deg, #00b894, #55efc4); }

.category-card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  border-color: rgba(255,255,255,1);
}

.card-vowels_single:hover { box-shadow: 0 20px 40px rgba(255, 118, 117, 0.15); }
.card-vowels_double:hover { box-shadow: 0 20px 40px rgba(9, 132, 227, 0.15); }
.card-consonants:hover { box-shadow: 0 20px 40px rgba(0, 184, 148, 0.15); }

.category-icon {
  font-size: 3.5rem;
  margin-bottom: 15px;
  display: inline-block;
  transition: transform 0.3s ease;
}

.category-card:hover .category-icon {
  transform: scale(1.2) rotate(5deg);
}

.category-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 8px;
}

.category-desc {
  font-size: 0.95rem;
  color: #8395a7;
  margin-bottom: 15px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  border-top: 2px dashed #f1f2f6;
  padding-top: 15px;
}

.score-badge {
  font-size: 0.85rem;
  font-weight: 700;
  background: #f1f2f6;
  padding: 4px 10px;
  border-radius: 12px;
  color: #576574;
}

.stars-badge {
  display: flex;
  color: #ffe066;
  font-size: 1.1rem;
  gap: 2px;
}

/* 遊戲主畫面 */
#game-screen {
  justify-content: space-between;
  padding: 10px 0;
  animation: fadeIn 0.4s ease-out;
}

/* 頂部進度條 */
.progress-container {
  width: 100%;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  height: 12px;
  overflow: hidden;
  border: 2px solid #ffffff;
  margin-top: 10px;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ff7675, #ffeaa7);
  border-radius: 8px;
  transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

/* 雲朵單字放置區 */
.word-cloud-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  min-height: 280px;
}

.cloud-wrapper {
  position: relative;
  width: 420px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: floatCloud 6s ease-in-out infinite alternate;
}

.main-cloud {
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--color-cloud);
  border-radius: 100px;
  box-shadow: var(--shadow-cloud);
  z-index: 1;
  border: 4px solid #ffffff;
}

.main-cloud::before, .main-cloud::after {
  content: '';
  position: absolute;
  background: var(--color-cloud);
  border-radius: 50%;
  border-top: 4px solid #ffffff;
}

.main-cloud::before {
  width: 200px;
  height: 200px;
  top: -90px;
  left: 50px;
}

.main-cloud::after {
  width: 220px;
  height: 220px;
  top: -110px;
  right: 50px;
}

/* 覆蓋掉雲朵內側的白底圓圈邊界 */
.cloud-patch {
  position: absolute;
  width: 320px;
  height: 140px;
  background: #ffffff;
  top: 40px;
  left: 50px;
  border-radius: 40px;
  z-index: 2;
}

.cloud-content {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-top: 20px;
}

.word-display {
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.word-letter {
  display: inline-block;
}

/* 放置目標格 */
.drop-zone {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 85px;
  height: 65px;
  border: 4px dashed #bdc3c7;
  border-radius: 16px;
  background: #f8f9fa;
  margin: 0 8px;
  transition: all 0.2s ease;
  vertical-align: middle;
  position: relative;
}

.drop-zone.drag-over {
  border-color: #3498db;
  background: #ebf5fb;
  transform: scale(1.08);
  box-shadow: 0 0 15px rgba(52, 152, 219, 0.3);
}

.drop-zone.correct {
  border-color: var(--color-success);
  background: #e8f8f5;
  border-style: solid;
}

.drop-zone.wrong {
  border-color: var(--color-danger);
  background: #fdedec;
  border-style: solid;
  animation: shake 0.5s ease;
}

/* 雲朵內的發音按鈕 */
.btn-speak-cloud {
  background: linear-gradient(135deg, #74b9ff, #0984e3);
  color: #ffffff;
  border: none;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 6px 12px rgba(9, 132, 227, 0.3), inset 0 -3px 0 rgba(0, 0, 0, 0.15);
  transition: all 0.15s ease;
  border: 3px solid #ffffff;
  margin-left: 10px;
}

.btn-speak-cloud:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 16px rgba(9, 132, 227, 0.4), inset 0 -3px 0 rgba(0, 0, 0, 0.15);
}

.btn-speak-cloud:active {
  transform: scale(0.95);
}

/* Combo 動畫提示 */
.combo-banner {
  position: absolute;
  top: -30px;
  background: linear-gradient(135deg, #ff7675, #fdcb6e);
  color: #ffffff;
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: 0 6px 15px rgba(255, 118, 117, 0.3);
  border: 3px solid #ffffff;
  transform: scale(0) rotate(-5deg);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 5;
  pointer-events: none;
}

.combo-banner.show {
  transform: scale(1.1) rotate(-5deg);
  animation: bounce 0.6s ease infinite alternate;
}

/* 底部草地與積木區 */
.bottom-area {
  position: relative;
  width: 100%;
  height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 32px 32px 0 0;
  background: var(--bg-grass);
  border: 4px solid #ffffff;
  border-bottom: none;
  box-shadow: 0 -12px 30px rgba(0, 0, 0, 0.08);
  padding: 20px;
}

/* 草地上隨機小草 */
.grass-deco {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 20px;
  background-image: radial-gradient(circle at 10px 20px, transparent 12px, #6cbe58 12px);
  background-size: 20px 20px;
  top: -12px;
  left: 0;
}

/* 積木容器 */
.blocks-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  width: 100%;
  max-width: 760px;
  z-index: 5;
}

/* 字母積木樣式 */
.block {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 70px;
  background: linear-gradient(135deg, #ff9f43, #ff7979);
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: 700;
  border-radius: 18px;
  cursor: grab;
  box-shadow: 0 8px 0 #d35400, 0 10px 20px rgba(0, 0, 0, 0.15);
  border: 3px solid #ffffff;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  position: relative;
  touch-action: none; /* 禁用預設觸控動作，便於自訂觸控拖曳 */
}

.block:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 0 #d35400, 0 12px 24px rgba(0, 0, 0, 0.2);
}

.block:active {
  cursor: grabbing;
  transform: translateY(4px);
  box-shadow: 0 4px 0 #d35400, 0 4px 10px rgba(0, 0, 0, 0.1);
}

.block.dragging {
  opacity: 0.6;
  transform: scale(1.1);
}

/* 為了讓積木顏色豐富，新增多個色系 */
.block:nth-child(2n) {
  background: linear-gradient(135deg, #2ecc71, #1abc9c);
  box-shadow: 0 8px 0 #27ae60, 0 10px 20px rgba(0, 0, 0, 0.15);
}
.block:nth-child(2n):hover {
  box-shadow: 0 12px 0 #27ae60, 0 12px 24px rgba(0, 0, 0, 0.2);
}
.block:nth-child(2n):active {
  box-shadow: 0 4px 0 #27ae60, 0 4px 10px rgba(0, 0, 0, 0.1);
}

.block:nth-child(3n) {
  background: linear-gradient(135deg, #9b59b6, #8e44ad);
  box-shadow: 0 8px 0 #7d3c98, 0 10px 20px rgba(0, 0, 0, 0.15);
}
.block:nth-child(3n):hover {
  box-shadow: 0 12px 0 #7d3c98, 0 12px 24px rgba(0, 0, 0, 0.2);
}
.block:nth-child(3n):active {
  box-shadow: 0 4px 0 #7d3c98, 0 4px 10px rgba(0, 0, 0, 0.1);
}

.block:nth-child(4n) {
  background: linear-gradient(135deg, #3498db, #2980b9);
  box-shadow: 0 8px 0 #2471a3, 0 10px 20px rgba(0, 0, 0, 0.15);
}
.block:nth-child(4n):hover {
  box-shadow: 0 12px 0 #2471a3, 0 12px 24px rgba(0, 0, 0, 0.2);
}
.block:nth-child(4n):active {
  box-shadow: 0 4px 0 #2471a3, 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* 觸控拖曳中的臨時虛擬積木 */
.drag-proxy {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  width: 80px;
  height: 70px;
  background: linear-gradient(135deg, #ff9f43, #ff7979);
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: 700;
  border-radius: 18px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.25);
  border: 3px solid #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%) scale(1.1);
  opacity: 0.9;
}

/* 彈窗樣式 (共用玻璃擬態) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(44, 62, 80, 0.6);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.modal-card {
  background: rgba(255, 255, 255, 0.95);
  border: 6px solid #ffffff;
  border-radius: 36px;
  width: 100%;
  max-width: 460px;
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow-panel);
  position: relative;
  transform: scale(0.7);
  animation: modalPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.modal-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--color-text-dark);
}

.modal-card.success .modal-title {
  color: var(--color-success);
}

.modal-card.fail .modal-title {
  color: var(--color-danger);
}

.modal-stars {
  font-size: 3rem;
  color: #ffd23f;
  margin: 20px 0;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.modal-star {
  opacity: 0.2;
  transform: scale(0.8);
  transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-star.active {
  opacity: 1;
  transform: scale(1.1);
  animation: starBounce 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-body {
  font-size: 1.2rem;
  color: #576574;
  margin-bottom: 30px;
  line-height: 1.6;
}

.modal-score {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2c3e50;
  margin: 10px 0;
  background: #f1f2f6;
  padding: 10px;
  border-radius: 16px;
}

.modal-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, #ff7675, #ff4757);
  color: #ffffff;
  border: none;
  font-size: 1.2rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 18px;
  cursor: pointer;
  box-shadow: 0 6px 0 #c0392b;
  transition: all 0.1s ease;
  border: 3px solid #ffffff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 #c0392b;
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 4px 0 #c0392b;
}

.btn-secondary {
  background: linear-gradient(135deg, #74b9ff, #0984e3);
  color: #ffffff;
  border: none;
  font-size: 1.2rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 18px;
  cursor: pointer;
  box-shadow: 0 6px 0 #2980b9;
  transition: all 0.1s ease;
  border: 3px solid #ffffff;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 #2980b9;
}

.btn-secondary:active {
  transform: translateY(2px);
  box-shadow: 0 4px 0 #2980b9;
}

/* 動畫效果庫 */
@keyframes slideDown {
  0% { transform: translateY(-100px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes modalPop {
  0% { transform: scale(0.7); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes floatCloud {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(1deg); }
  100% { transform: translateY(5px) rotate(-1deg); }
}

@keyframes heartPulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.15); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

@keyframes bounce {
  0% { transform: scale(1) translateY(0) rotate(-5deg); }
  100% { transform: scale(1.05) translateY(-5px) rotate(-5deg); }
}

@keyframes starBounce {
  0% { transform: scale(0); }
  80% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

/* 煙火/星星 Canvas 特效容器 */
#particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99;
}

/* 學習模式專用樣式 */
.study-tile {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: linear-gradient(135deg, #ffeaa7, #fdcb6e);
  color: #2c3e50;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 18px;
  cursor: pointer;
  box-shadow: 0 6px 0 #e67e22, 0 8px 16px rgba(0, 0, 0, 0.08);
  border: 3px solid #ffffff;
  transition: all 0.15s ease;
}

.study-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 9px 0 #e67e22, 0 10px 20px rgba(0, 0, 0, 0.12);
}

.study-tile:active {
  transform: translateY(3px);
  box-shadow: 0 3px 0 #e67e22, 0 4px 8px rgba(0, 0, 0, 0.08);
}

.study-tile.active {
  background: linear-gradient(135deg, #ff7675, #ff4757);
  color: #ffffff;
  box-shadow: 0 6px 0 #c0392b, 0 8px 16px rgba(255, 118, 117, 0.2);
}

.study-word-card {
  background: #ffffff;
  border: 3px solid #ffffff;
  border-radius: 18px;
  padding: 16px 10px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 6px 15px rgba(0,0,0,0.05);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.study-word-card:hover {
  transform: scale(1.05) translateY(-3px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  border-color: #ffeaa7;
}

.study-word-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-dark);
}

.study-word-text u {
  color: #ff7675;
  text-decoration: underline;
  font-weight: 800;
  text-underline-offset: 4px;
}

.study-word-speaker {
  font-size: 1.1rem;
  color: #95a5a6;
  transition: color 0.2s;
}

.study-word-card:hover .study-word-speaker {
  color: #0984e3;
}

/* 響應式調整 */
@media (max-width: 600px) {
  .game-title { font-size: 2.5rem; }
  .cloud-wrapper { width: 320px; height: 180px; }
  .main-cloud::before { width: 140px; height: 140px; top: -60px; left: 40px; }
  .main-cloud::after { width: 160px; height: 160px; top: -80px; right: 40px; }
  .cloud-patch { width: 240px; height: 110px; top: 30px; left: 40px; }
  .word-display { font-size: 2.2rem; }
  .drop-zone { width: 65px; height: 50px; border-radius: 12px; }
  .btn-speak-cloud { width: 42px; height: 42px; font-size: 1.2rem; }
  .block { width: 65px; height: 55px; font-size: 1.4rem; border-radius: 12px; }
  .hud { padding: 8px 12px; gap: 8px; }
  .hud-item { font-size: 1rem; }
  .heart { font-size: 1.2rem; }
  .btn-icon { width: 36px; height: 36px; font-size: 1rem; }
}