:root {
  --bg: #0f1220;
  --bg-soft: #171a2b;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e8eaf6;
  --text-dim: #8b90a8;
  --text-untyped: #5a5f78;
  --accent: #6c8cff;
  --accent-2: #22d3ee;
  --correct: #34d399;
  --error: #f87171;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-soft: #ffffff;
  --card: rgba(0, 0, 0, 0.03);
  --card-border: rgba(0, 0, 0, 0.08);
  --text: #1f2333;
  --text-dim: #6b7280;
  --text-untyped: #b4b9c9;
  --accent: #4f6ef7;
  --accent-2: #0891b2;
  --star: #9aa3c2;
  --star-glow: rgba(79, 110, 247, 0.5);
  --shadow: 0 20px 60px rgba(31, 41, 90, 0.12);
}

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

.hidden {
  display: none !important;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ---------- 背景装饰 ---------- */
.bg-decoration {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

/* 星空粒子层：星星闪烁 + 漂浮光点（由 JS 生成） */
.stars {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.stars .star {
  position: absolute;
  border-radius: 50%;
  background: var(--star, #ffffff);
  box-shadow: 0 0 6px var(--star-glow, rgba(255, 255, 255, 0.8));
  animation: twinkle ease-in-out infinite;
}

.stars .dust {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.65), rgba(108, 140, 255, 0.08));
  filter: blur(1px);
  animation: dustFloat ease-in-out infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.15; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

@keyframes dustFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.2; }
  50% { transform: translate(7px, -14px); opacity: 0.85; }
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.2;
  animation: float 12s ease-in-out infinite;
}

.orb-1 { width: 380px; height: 380px; background: var(--accent); top: -120px; left: -80px; }
.orb-2 { width: 320px; height: 320px; background: var(--accent-2); bottom: -100px; right: -60px; animation-delay: -4s; }
.orb-3 { width: 260px; height: 260px; background: #a78bfa; top: 40%; left: 70%; animation-delay: -8s; }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.06); }
}

/* ---------- 布局 ---------- */
.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ---------- 顶部 ---------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon { font-size: 26px; }

.logo-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-sub {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 5px;
  backdrop-filter: blur(10px);
}

.nav-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-btn:hover { color: var(--text); }

.nav-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(108, 140, 255, 0.4);
}

.nav-divider {
  width: 1px;
  height: 24px;
  background: var(--card-border);
  margin: 0 6px;
  align-self: center;
}

.header-actions { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  width: 42px;
  height: 42px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  font-size: 18px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.icon-btn:hover { transform: scale(1.08); }

.account-btn.logged-in {
  width: auto;
  min-width: 42px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  border-color: var(--accent);
  white-space: nowrap;
}

/* ---------- 统计栏 ---------- */
.stats-bar {
  display: flex;
  justify-content: space-around;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 90px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 1px;
}

.stat-value {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text);
}

.stat-unit {
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 打字区域 ---------- */
.typing-area {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  cursor: text;
}

.text-display {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 2;
  min-height: 160px;
  max-height: 220px;
  overflow-y: auto;
  padding: 8px 4px;
  user-select: none;
  white-space: pre-wrap;
  word-break: break-word;
}

.text-display .char {
  border-radius: 4px;
  transition: background 0.08s ease, color 0.08s ease;
}

.text-display .char.correct { color: var(--correct); }
.text-display .char.incorrect {
  color: var(--error);
  background: rgba(248, 113, 113, 0.18);
  text-decoration: underline;
  text-decoration-color: var(--error);
}
.text-display .char.current {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 2px rgba(108, 140, 255, 0.5);
  animation: blink 1s infinite;
}

@keyframes blink {
  50% { box-shadow: 0 0 0 2px rgba(108, 140, 255, 0.15); }
}

.text-display .char.untyped { color: var(--text-untyped); }

.hidden-input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.focus-hint {
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  margin-top: 18px;
  opacity: 0.9;
  animation: pulse 2s ease-in-out infinite;
}

.focus-hint.hidden { display: none; }

@keyframes pulse {
  0%, 50% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* ---------- 键盘 ---------- */
.keyboard {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  user-select: none;
}

.key-row {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.key {
  min-width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  transition: all 0.1s ease;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.15);
}

.key.key-wide { min-width: 70px; }
.key.key-wider { min-width: 96px; }
.key.key-space { min-width: 300px; }

.key.pressed {
  background: var(--accent);
  color: #fff;
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

/* ---------- 结果弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.3s ease;
}

.modal.hidden { display: none; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px 44px;
  max-width: 520px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow);
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-title {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 24px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.result-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.result-num {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.result-label {
  font-size: 12px;
  color: var(--text-dim);
}

.result-rating {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  min-height: 26px;
}

.result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* 自定义计时输入 */
.custom-form {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

.custom-input {
  width: 160px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
  background: var(--bg-soft);
  border: 2px solid var(--card-border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s ease;
}

.custom-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.2);
}

.custom-input.invalid {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.2);
}

.custom-unit {
  font-size: 14px;
  color: var(--text-dim);
}

.btn {
  border: none;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(108, 140, 255, 0.4);
}

.btn-primary:hover { transform: translateY(-2px); }

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--card-border);
}

.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }

.btn-danger {
  background: var(--error);
  color: #fff;
  box-shadow: 0 6px 20px rgba(248, 113, 113, 0.35);
}

.btn-danger:hover { transform: translateY(-2px); }

/* ---------- 错题管理 ---------- */
.wrong-modal-card { max-width: 500px; text-align: left; }
.wrong-modal-card .modal-title { text-align: center; }
.wrong-manage-list {
  max-height: 45vh;
  overflow-y: auto;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.wrong-manage-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 10px 12px;
}
.wrong-manage-info { flex: 1; min-width: 0; }
.wrong-manage-word { font-weight: 700; font-size: 15px; }
.wrong-manage-cn {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.wrong-manage-count { font-size: 11px; color: var(--text-dim); flex-shrink: 0; }
.wrong-remove-btn {
  border: none;
  background: rgba(248, 113, 113, 0.12);
  color: var(--error);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s ease;
}
.wrong-remove-btn:hover { background: rgba(248, 113, 113, 0.25); transform: scale(1.05); }
.wrong-empty { text-align: center; color: var(--text-dim); font-size: 14px; margin-bottom: 16px; }

/* ---------- 账号 ---------- */
.account-modal-card { max-width: 400px; }
.account-field { margin-bottom: 14px; text-align: left; }
.account-field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.account-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 11px 14px;
  font-size: 15px;
  color: var(--text);
  background: var(--card);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s ease;
}
.account-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.2); }
.account-msg { min-height: 22px; font-size: 13px; font-weight: 600; color: var(--accent-2); margin-bottom: 10px; }
.account-actions { display: flex; gap: 10px; justify-content: center; margin-bottom: 12px; }
.account-status { font-size: 12px; color: var(--text-dim); margin-bottom: 12px; }
.account-hint { font-size: 11px; color: var(--text-dim); text-align: center; margin-top: 10px; }

/* ---------- 欢迎使用引导 ---------- */
.welcome-card { max-width: 560px; text-align: left; }
.welcome-sub { font-size: 13px; color: var(--text-dim); text-align: center; margin: -6px 0 16px; line-height: 1.6; }
.welcome-steps { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.welcome-step { display: flex; gap: 12px; align-items: flex-start; background: var(--bg-soft); border: 1px solid var(--card-border); border-radius: 12px; padding: 11px 14px; }
.welcome-num { flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.welcome-step b { display: block; font-size: 14px; color: var(--text); margin-bottom: 2px; }
.welcome-step p { margin: 0; font-size: 12px; color: var(--text-dim); line-height: 1.6; }
.welcome-points { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 16px; }
.welcome-points span { font-size: 12px; font-weight: 700; color: var(--text-dim); background: var(--card); border: 1px solid var(--card-border); border-radius: 999px; padding: 5px 12px; }
.welcome-card .result-actions { text-align: center; }
.account-agree { display: flex; align-items: flex-start; gap: 6px; font-size: 11px; color: var(--text-dim); margin-bottom: 10px; text-align: left; line-height: 1.5; }
.account-agree input { margin-top: 2px; accent-color: var(--accent); }
.account-divider { border: none; border-top: 1px solid var(--card-border); margin: 12px 0 10px; }
.account-change .custom-label { margin-bottom: 8px; }
.account-change .btn { width: 100%; }

/* ---------- 滚动条 ---------- */
.text-display::-webkit-scrollbar { width: 6px; }
.text-display::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 3px; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .app { padding: 16px 12px 40px; }
  .text-display { font-size: 17px; }
  .stats-bar { flex-wrap: wrap; }
  .key { min-width: 28px; height: 34px; font-size: 11px; }
  .key-wide { min-width: 44px; }
  .key-wider { min-width: 60px; }
  .key-space { min-width: 160px; }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 英语学习视图 ---------- */
.learn-view {
  animation: fadeIn 0.3s ease;
}

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

.learn-cats,
.learn-modes {
  display: flex;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 5px;
  backdrop-filter: blur(10px);
}

.cat-btn,
.mode-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cat-btn:hover,
.mode-btn:hover { color: var(--text); }

.mode-ghost-btn {
  border: 1px dashed var(--card-border);
  background: transparent;
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-ghost-btn:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(108, 140, 255, 0.4);
}

.cat-btn.active,
.mode-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 14px rgba(108, 140, 255, 0.4);
}

.cat-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  color: var(--text-dim);
}

.learn-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.learn-progress {
  margin-bottom: 24px;
}

.progress-text {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.progress-track {
  height: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-tag {
  color: var(--accent);
  font-weight: 700;
  margin-right: 4px;
}

/* ---------- 复习模式（错题本旁） ---------- */
.review-badge {
  display: inline-block;
  min-width: 18px;
  padding: 1px 6px;
  margin-left: 6px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--accent);
  background: rgba(108, 140, 255, 0.15);
  border-radius: 10px;
}
#reviewCatBtn.active .review-badge {
  color: #fff;
  background: rgba(255, 255, 255, 0.25);
}

.word-display {
  text-align: center;
  padding: 20px 0 28px;
}

.word-en {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--text);
  min-height: 60px;
  transition: all 0.3s ease;
}

.word-en.revealed {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.word-en.sentence {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.5px;
  line-height: 1.7;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* 听写模式：给翻译默写（中文翻译作为默写提示，比英文略小） */
.word-en.dict-translate {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.6;
  color: var(--text);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.word-phonetic-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

.word-phonetic {
  font-size: 18px;
  color: var(--accent-2);
  font-family: var(--font-mono);
}

/* 手动播放发音按钮 */
.play-btn {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--accent-2);
  font-size: 15px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.play-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.1);
  box-shadow: 0 4px 14px rgba(108, 140, 255, 0.4);
}

.play-btn:active {
  transform: scale(0.9);
}

.play-btn.playing {
  background: var(--accent);
  color: #fff;
  animation: pulse-ring 0.8s ease infinite;
}

/* 词形变化按钮 */
.forms-btn {
  height: 32px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.forms-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(108, 140, 255, 0.4);
}

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

/* 词形弹窗 */
.forms-card { max-width: 460px; }

.forms-body {
  text-align: left;
  max-height: 55vh;
  overflow-y: auto;
  margin-bottom: 20px;
}

.forms-group { margin-bottom: 16px; }

.forms-group-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 8px;
}

.forms-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  margin-bottom: 6px;
}

.forms-item-label {
  font-size: 13px;
  color: var(--text-dim);
}

.forms-item-value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.forms-empty {
  color: var(--text-dim);
  text-align: center;
  padding: 16px 0;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(108, 140, 255, 0.5); }
  100% { box-shadow: 0 0 0 12px rgba(108, 140, 255, 0); }
}

.word-cn {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-top: 14px;
}

.word-example {
  margin-top: 20px;
  padding: 14px 20px;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.example-en {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
}

.example-cn {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 6px;
}

.word-extras {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}
.word-synonym,
.word-root {
  font-size: 13px;
  color: var(--text-dim);
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 10px 14px;
  text-align: left;
  line-height: 1.6;
}
.word-synonym::before { content: '🔁 '; }
.word-root::before { content: '🧠 '; }

/* ---------- 记忆度自评 ---------- */
.mastery-stats {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 10px;
  font-weight: 600;
}
.mastery-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}
.mastery-label { font-size: 13px; color: var(--text-dim); font-weight: 700; }
.mastery-btn {
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.2s ease;
}
.mastery-btn:hover { transform: translateY(-2px); border-color: var(--text-dim); }
.mastery-btn.m-known.active { border-color: #6fcf6f; color: #6fcf6f; background: rgba(111, 207, 111, 0.12); }
.mastery-btn.m-hesitant.active { border-color: #f2c94c; color: #f2c94c; background: rgba(242, 201, 76, 0.12); }
.mastery-btn.m-unknown.active { border-color: #f87171; color: #f87171; background: rgba(248, 113, 113, 0.12); }
mark.hl-word {
  background: rgba(108, 140, 255, 0.25);
  color: var(--accent);
  font-weight: 700;
  border-radius: 4px;
  padding: 0 2px;
}
#reviewToggle.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(108, 140, 255, 0.12);
}

.learn-type-area {
  max-width: 460px;
  margin: 0 auto;
}

.learn-input-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.learn-input-row .learn-input {
  flex: 1;
  min-width: 0;
}

.reveal-answer-btn {
  flex-shrink: 0;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--bg-soft);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.reveal-answer-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(108, 140, 255, 0.1);
}

.learn-input {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  letter-spacing: 1px;
  color: var(--text);
  background: var(--bg-soft);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.learn-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.2);
}

.learn-input.correct-input {
  border-color: var(--correct);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.2);
}

.learn-input.wrong-input {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.2);
  animation: shake 0.3s ease;
}

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

.learn-feedback {
  min-height: 24px;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  color: var(--text-dim);
}

/* 句子逐字母拼写反馈 */
.learn-spell {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 2;
  margin-bottom: 12px;
  text-align: left;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 10px 14px;
  min-height: 44px;
  user-select: none;
  word-break: break-word;
}

.learn-spell.hidden { display: none; }

.spell-ok { color: var(--correct); }

.spell-bad {
  color: var(--error);
  background: rgba(248, 113, 113, 0.2);
  border-radius: 3px;
  text-decoration: underline;
  text-decoration-color: var(--error);
}

.spell-next {
  color: var(--accent);
  background: rgba(108, 140, 255, 0.25);
  border-radius: 3px;
}

.spell-muted { color: var(--text-untyped); }

.learn-feedback.ok { color: var(--correct); }
.learn-feedback.bad { color: var(--error); }

.learn-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.learn-action-row {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.learn-tip {
  font-size: 12px;
  color: var(--text-dim);
}

/* 学习完成徽章 */
.learn-badge {
  font-size: 56px;
  margin-bottom: 8px;
}

/* ---------- 英文语音缺失提示 ---------- */
.voice-hint {
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: #fbbf24;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}

.voice-hint.hidden { display: none; }

@media (max-width: 720px) {
  .app { padding: 14px 10px calc(44px + env(safe-area-inset-bottom)); }
  .word-en { font-size: 32px; }
  .word-en.dict-translate { font-size: 24px; }
  .word-cn { font-size: 17px; }
  .learn-topbar { flex-direction: column; align-items: stretch; }
  .learn-cats, .learn-modes { justify-content: center; flex-wrap: wrap; }
  .cat-btn, .mode-btn, .mode-ghost-btn { font-size: 12px; padding: 7px 9px; }
  .learn-card { padding: 20px 16px; border-radius: 16px; }
  .learn-input-row .learn-input { font-size: 18px; padding: 12px 14px; }
  .reveal-answer-btn { padding: 0 12px; font-size: 13px; }
  .learn-spell { font-size: 16px; padding: 8px 10px; }
  .learn-tip { font-size: 11px; line-height: 1.7; text-align: center; }
  .learn-action-row { flex-wrap: wrap; }
  .learn-action-row .btn { padding: 8px 12px; font-size: 13px; }
  .modal-card { padding: 22px 18px; border-radius: 18px; width: 94%; }
  .modal-title { font-size: 20px; }
  .custom-word-list { max-height: 46vh; }
  .pet-wrap { right: 10px; bottom: 10px; }
  .pet canvas { width: 96px; height: 96px; }
  .pet-bubble { bottom: 100px; font-size: 12px; white-space: normal; max-width: 220px; }
}

/* ---------- 麻薯桌宠 ---------- */
.pet-wrap {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  pointer-events: none;
}

.pet {
  position: relative;
  cursor: pointer;
  user-select: none;
  pointer-events: auto;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.18));
}

.pet-wardrobe-btn {
  pointer-events: auto;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--card);
  color: var(--text);
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease;
}
.pet-wardrobe-btn:hover { transform: scale(1.12) rotate(-10deg); }

.pet canvas {
  width: 128px;
  height: 128px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.pet-bubble {
  position: absolute;
  bottom: 132px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  color: #333;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 10px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation: bubbleIn 0.25s ease;
}

.pet-bubble::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #fff;
}

.pet-bubble.hidden { display: none; }

@keyframes bubbleIn {
  from { opacity: 0; transform: translate(-50%, 6px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.pet-idle { animation: petFloat 3s ease-in-out infinite; }
.pet-typing { animation: petType 0.3s ease-in-out infinite; }
.pet-correct { animation: petJump 0.5s ease; }
.pet-wrong { animation: petSad 0.6s ease; }

@keyframes petFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes petType {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(2px) rotate(2deg); }
}

@keyframes petJump {
  0% { transform: translateY(0); }
  40% { transform: translateY(-18px); }
  100% { transform: translateY(0); }
}

@keyframes petSad {
  0% { transform: translateY(0); }
  50% { transform: translateY(6px); }
  100% { transform: translateY(0); }
}

/* ---------- 投喂面板 ---------- */
.pet-feed-panel {
  position: fixed;
  right: 16px;
  bottom: 178px;
  z-index: 85;
  width: 176px;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 12px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}
.pet-feed-panel.hidden { display: none; }
.pet-feed-title { font-size: 13px; font-weight: 700; margin-bottom: 8px; text-align: center; }
.pet-feed-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 8px; }
.pet-food-btn {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: 10px;
  font-size: 22px;
  padding: 6px 0;
  cursor: pointer;
  transition: transform 0.15s ease;
}
.pet-food-btn:hover { transform: scale(1.15); }
.pet-food-btn.locked { opacity: 0.5; filter: grayscale(0.8); cursor: not-allowed; }
.pet-food-btn.locked:hover { transform: none; }
.pet-food-btn.ready { border: 2px solid #6fcf6f; animation: petReadyPulse 1.2s ease infinite; }
.pet-feed-hint { font-size: 11px; color: var(--text-dim); text-align: center; margin-top: 6px; }
.pet-feed-count { font-size: 11px; color: var(--text-dim); text-align: center; }

/* ---------- 麻薯衣橱 ---------- */
.pet-modal-card { max-width: 430px; width: 92%; }
.pet-time-bar { margin-bottom: 14px; }
.pet-time-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.pet-time-label { font-weight: 700; }
.pet-next-unlock { color: var(--text-dim); font-size: 12px; }
.pet-time-track {
  height: 10px;
  border-radius: 999px;
  background: var(--card-border);
  overflow: hidden;
}
.pet-time-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #ffb3c1, #ffd93d);
  transition: width 0.6s ease;
}
.pet-outfit-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}
.pet-outfit-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 6px;
  border-radius: 14px;
  border: 2px solid var(--card-border);
  background: var(--card);
  cursor: pointer;
  transition: all 0.2s ease;
}
.pet-outfit-item:hover:not(.locked) { transform: translateY(-3px); border-color: #ffb3c1; }
.pet-outfit-item.active { border-color: #ff9eb5; box-shadow: 0 0 0 3px rgba(255, 158, 181, 0.25); }
.pet-outfit-item.locked { opacity: 0.55; cursor: not-allowed; filter: grayscale(0.6); }
.pet-outfit-item.ready { border-color: #6fcf6f; animation: petReadyPulse 1.2s ease infinite; }
.pet-outfit-preview { font-size: 34px; line-height: 1.2; }
.pet-outfit-name { font-size: 13px; font-weight: 700; }
.pet-outfit-need { font-size: 11px; color: var(--text-dim); }
.pet-decor-section { margin-bottom: 14px; }
.pet-decor-title { font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.pet-decor-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.pet-decor-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 4px;
  border-radius: 12px;
  border: 2px solid var(--card-border);
  background: var(--card);
  cursor: pointer;
  transition: all 0.2s ease;
}
.pet-decor-item:hover:not(.locked) { transform: translateY(-3px); border-color: #ffb3c1; }
.pet-decor-item.active { border-color: #ff9eb5; box-shadow: 0 0 0 3px rgba(255, 158, 181, 0.25); }
.pet-decor-item.locked { opacity: 0.55; cursor: not-allowed; filter: grayscale(0.6); }
.pet-decor-item.ready { border-color: #6fcf6f; animation: petReadyPulse 1.2s ease infinite; }
.pet-decor-emoji { font-size: 24px; line-height: 1.2; }
.pet-decor-name { font-size: 12px; font-weight: 700; }
.pet-decor-need { font-size: 10px; color: var(--text-dim); }
.pet-tip { font-size: 12px; color: var(--text-dim); text-align: center; margin: 0 0 12px; }
@keyframes petReadyPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(111, 207, 111, 0.25); }
  50% { box-shadow: 0 0 0 6px rgba(111, 207, 111, 0.45); }
}

.learn-stage {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  background: rgba(108, 140, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(108, 140, 255, 0.3);
}

.learn-stage.stage-medium {
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-2);
  border-color: rgba(34, 211, 238, 0.35);
}

.learn-stage.stage-long {
  background: rgba(167, 139, 250, 0.15);
  color: #a78bfa;
  border-color: rgba(167, 139, 250, 0.35);
}

.learn-stage.hidden { display: none; }

/* 作文范文英文题目（背诵时显示在顶部） */
.learn-prompt {
  font-size: 15px;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.6;
  margin-bottom: 10px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  word-break: break-word;
}

/* ---------- 自定义背词 ---------- */
.custom-modal-card {
  max-width: 660px;
  text-align: left;
  display: flex;
  flex-direction: column;
  max-height: 92vh;
  overflow-y: auto;
}
.custom-modal-card .modal-title { text-align: center; flex-shrink: 0; }
.custom-modal-card .custom-section { flex-shrink: 0; }
.custom-modal-card .custom-section-list {
  flex: 1 1 auto;
  min-height: 120px;
  display: flex;
  flex-direction: column;
}
.custom-modal-card .custom-section-list .custom-word-list {
  flex: 1 1 auto;
  min-height: 80px;
}
.custom-modal-card .result-actions { flex-shrink: 0; }

.custom-section { margin-bottom: 18px; }
.custom-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.custom-source-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.custom-source-btn {
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
}
.custom-source-btn:hover { color: var(--text); border-color: var(--text-dim); }
.custom-source-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.custom-search {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-soft);
  border: 2px solid var(--card-border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s ease;
  margin-bottom: 10px;
}
.custom-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.2);
}

.custom-letter-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.custom-lf {
  min-width: 34px;
  padding: 5px 8px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all 0.2s ease;
}
.custom-lf:hover { color: var(--text); border-color: var(--text-dim); }
.custom-lf.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* 短语模式：标题筛选（四六级分组） */
.custom-lf-title {
  min-width: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  white-space: normal;
}
.custom-lf-group {
  flex: 1 1 100%;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 2px 0;
}

.custom-word-list {
  flex: 1 1 auto;
  min-height: 100px;
  max-height: none;
  overflow-y: auto;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--bg-soft);
}
.custom-word-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.15s ease;
  border-bottom: 1px solid var(--card-border);
}
.custom-word-item:last-child { border-bottom: none; }
.custom-word-item:hover { background: var(--card); }
.custom-word-item.on { background: rgba(108, 140, 255, 0.12); }
.cwi-check {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  cursor: pointer;
  flex-shrink: 0;
}
.cwi-en {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
  min-width: 110px;
}
.cwi-ph {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  min-width: 110px;
}
.cwi-cn {
  font-size: 13px;
  color: var(--text-dim);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.custom-letter-tools {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 9px;
}

.custom-textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 84px;
  resize: vertical;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-soft);
  border: 2px solid var(--card-border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s ease;
  margin-bottom: 10px;
}
.custom-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.2);
}

.custom-selected {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 96px;
  overflow-y: auto;
}
.custom-chip {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 3px 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text);
}
.custom-empty {
  font-size: 13px;
  color: var(--text-dim);
}
.custom-count {
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 1px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
}

/* ---------- 移动端覆盖（文件末尾，确保优先级） ---------- */
@media (max-width: 720px) {
  .pet-wrap { right: 10px; bottom: 10px; }
  .pet canvas { width: 96px; height: 96px; }
  .pet-bubble { bottom: 100px; font-size: 12px; white-space: normal; max-width: 220px; }
  .pet-wardrobe-btn { width: 30px; height: 30px; font-size: 15px; }
}