/* ============================================================
   听写助手 — 完整样式表
   设计理念：大按钮、高对比度、色彩明亮、操作极简
   响应式设计，完美适配移动端（320px ~ 1024px+）
   ============================================================ */

/* ---------- CSS 自定义属性（设计令牌） ---------- */
:root {
  /* 品牌色 */
  --color-primary:        #4F46E5;
  --color-primary-hover:  #4338CA;
  --color-primary-light:  #EEF2FF;
  --color-success:        #059669;
  --color-success-light:  #D1FAE5;
  --color-warning:        #F59E0B;
  --color-warning-light:  #FEF3C7;
  --color-danger:         #EF4444;
  --color-current:        #FBBF24;
  --color-current-bg:     #FEF9C3;

  /* 中性色 */
  --color-bg:             #F0F4FF;
  --color-surface:        #FFFFFF;
  --color-text:           #1E293B;
  --color-text-secondary: #64748B;
  --color-border:         #E2E8F0;

  /* 尺寸 */
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.03);
  --shadow-btn:  0 4px 14px rgba(79, 70, 229, 0.3);
  --shadow-lg:   0 8px 30px rgba(0, 0, 0, 0.10);

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ---------- 全局重置 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
    Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- 应用容器 ---------- */
.app-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 16px 32px;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- 头部 ---------- */
.app-header {
  text-align: center;
  padding: 24px 0 8px;
}

.app-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: 0.02em;
}

.title-icon {
  font-size: 2rem;
}

.app-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-top: 4px;
}

/* ---------- 主内容区 ---------- */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 8px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.card-label {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--color-text);
}

/* ---------- 文本输入 ---------- */
.text-input {
  width: 100%;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 1.1rem;
  font-family: inherit;
  line-height: 1.8;
  color: var(--color-text);
  background: #FAFBFC;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.text-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.text-input::placeholder {
  color: #B0B7C3;
}

.input-hint {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.word-count-badge {
  display: inline-block;
  margin-top: 10px;
  padding: 6px 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

.word-count-badge span {
  font-weight: 800;
  font-size: 1.1rem;
}

/* ---------- 设置区 ---------- */
.settings-card {
  padding-bottom: 12px;
}

.setting-row {
  margin-bottom: 18px;
}

.setting-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.setting-label {
  font-size: 1rem;
  font-weight: 600;
}

.setting-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: 999px;
}

/* ---------- 滑块 ---------- */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--color-primary-light), var(--color-primary));
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:active {
  transform: scale(1.15);
}

.slider::-moz-range-thumb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
  cursor: pointer;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  padding: 0 2px;
}

/* ---------- 按钮基础样式 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius-xl);
  padding: 14px 28px;
  font-size: 1.05rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn:active {
  transform: scale(0.96);
}

/* 主要按钮 */
.btn-primary {
  background: var(--color-primary);
  color: #FFF;
  box-shadow: var(--shadow-btn);
}

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

.btn-primary:active {
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
}

/* 开始按钮（特大） */
.btn-start {
  width: 100%;
  padding: 18px;
  font-size: 1.3rem;
  border-radius: var(--radius-lg);
}

/* 播放按钮 */
.btn-play {
  width: 120px;
  height: 56px;
  padding: 0;
  font-size: 1.1rem;
  background: var(--color-success);
  color: #FFF;
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}

.btn-play:hover {
  background: #047857;
}

/* 暂停按钮 */
.btn-pause {
  width: 120px;
  height: 56px;
  padding: 0;
  font-size: 1.1rem;
  background: var(--color-warning);
  color: #FFF;
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.btn-pause:hover {
  background: #D97706;
}

/* 图标按钮 */
.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  font-size: 1.3rem;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 50%;
}

.btn-icon:hover {
  background: #DDE4FF;
}

/* 次要按钮 */
.btn-secondary {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- 听写区域 ---------- */
.dictation-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideUp 0.35s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 进度条 ---------- */
.progress-section {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
}

.progress-text {
  font-size: 1rem;
  margin-bottom: 10px;
}

.progress-text strong {
  color: var(--color-primary);
  font-size: 1.2rem;
}

.progress-bar-track {
  width: 100%;
  height: 12px;
  background: #E8ECF4;
  border-radius: 6px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), #818CF8);
  border-radius: 6px;
  transition: width 0.4s ease;
  width: 0%;
}

/* ---------- 当前朗读词语 ---------- */
.current-word-display {
  text-align: center;
  padding: 16px 20px;
  background: var(--color-current-bg);
  border: 3px solid var(--color-current);
  border-radius: var(--radius-lg);
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.current-word-display span {
  font-size: 2rem;
  font-weight: 900;
  color: #92400E;
  letter-spacing: 0.05em;
  animation: pulseWord 1s ease-in-out infinite;
}

@keyframes pulseWord {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

/* ---------- 词语列表 ---------- */
.words-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  justify-content: center;
}

.word-chip {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 1.1rem;
  font-weight: 600;
  background: #F1F5F9;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  border: 2px solid transparent;
}

.word-chip:hover {
  background: #E2E8F0;
  transform: translateY(-1px);
}

/* 已完成 */
.word-chip.completed {
  background: var(--color-success-light);
  color: var(--color-success);
  border-color: transparent;
}

.word-chip.completed::after {
  content: ' ✓';
  font-size: 0.8rem;
}

/* 当前 */
.word-chip.current {
  background: var(--color-current-bg);
  color: #92400E;
  border-color: var(--color-current);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.35);
}

.word-chip.current.playing {
  animation: chipPulse 1s ease-in-out infinite;
}

@keyframes chipPulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(251, 191, 36, 0.35); }
  50% { box-shadow: 0 6px 20px rgba(251, 191, 36, 0.55); }
}

/* ---------- 控制栏 ---------- */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 8px 0;
}

.secondary-controls {
  display: flex;
  justify-content: center;
}

/* ---------- 庆祝动画 ---------- */
.celebration {
  text-align: center;
  padding: 20px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-success);
  animation: bounceIn 0.5s ease;
}

@keyframes bounceIn {
  0%   { opacity: 0; transform: scale(0.3); }
  40%  { transform: scale(1.08); }
  70%  { transform: scale(0.95); }
  100% { opacity: 1; transform: scale(1); }
}

/* ---------- 页脚 ---------- */
.app-footer {
  text-align: center;
  padding: 20px 0 8px;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
}

/* ============================================================
   响应式设计
   ============================================================ */

/* 平板及以上 */
@media (min-width: 600px) {
  .app-container {
    padding: 20px 24px 40px;
  }

  .app-title {
    font-size: 2.2rem;
  }

  .btn-start {
    padding: 20px;
    font-size: 1.4rem;
  }

  .current-word-display span {
    font-size: 2.4rem;
  }

  .word-chip {
    font-size: 1.2rem;
    padding: 12px 22px;
  }

  .controls-bar {
    gap: 24px;
  }

  .btn-play,
  .btn-pause {
    width: 140px;
    height: 60px;
    font-size: 1.2rem;
  }

  .btn-icon {
    width: 56px;
    height: 56px;
    font-size: 1.5rem;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .app-container {
    padding: 24px 32px 48px;
  }

  .card {
    padding: 24px;
  }

  .text-input {
    font-size: 1.15rem;
  }
}

/* 超小屏（320px 以下） */
@media (max-width: 360px) {
  .app-title {
    font-size: 1.5rem;
  }

  .btn-start {
    font-size: 1.15rem;
    padding: 16px;
  }

  .current-word-display span {
    font-size: 1.6rem;
  }

  .word-chip {
    font-size: 0.95rem;
    padding: 8px 14px;
  }

  .btn-play,
  .btn-pause {
    width: 100px;
    height: 48px;
    font-size: 1rem;
  }

  .btn-icon {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}

/* 暗色模式适配 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:             #0F172A;
    --color-surface:        #1E293B;
    --color-text:           #F1F5F9;
    --color-text-secondary: #94A3B8;
    --color-border:         #334155;
    --color-primary-light:  #1E2350;
    --color-current-bg:     #3D2E0A;
    --color-success-light:  #0A2E1F;
  }

  .text-input {
    background: #1A2332;
  }

  .word-chip {
    background: #2D3A50;
    color: #B0BEC5;
  }

  .word-chip:hover {
    background: #3A4A63;
  }

  .word-chip.current {
    color: #FDE68A;
  }

  .current-word-display span {
    color: #FDE68A;
  }

  .btn-secondary {
    background: var(--color-surface);
  }

  .btn-icon {
    background: var(--color-primary-light);
  }
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
  .current-word-display span,
  .word-chip.current.playing {
    animation: none;
  }

  .dictation-area {
    animation: none;
  }
}