/* Material 3 基础设计变量 (浅色模式) */
:root {
  --md-sys-color-primary: #0B57D0;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #D3E3FD;
  --md-sys-color-on-primary-container: #041E49;
  --md-sys-color-surface: #F8F9FA;
  --md-sys-color-surface-container: #FFFFFF;
  --md-sys-color-on-surface: #1F1F1F;
  --md-sys-color-on-surface-variant: #444746;
  --md-sys-color-outline: #747775;
  --md-sys-color-outline-variant: #C4C7C5;
  --md-sys-color-surface-tint: #E9EEF6;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 深色模式自动自适应 */
@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-primary: #A8C7FA;
    --md-sys-color-on-primary: #041E49;
    --md-sys-color-primary-container: #0842A0;
    --md-sys-color-on-primary-container: #D3E3FD;
    --md-sys-color-surface: #121316;
    --md-sys-color-surface-container: #1E1F22;
    --md-sys-color-on-surface: #E3E3E3;
    --md-sys-color-on-surface-variant: #C4C7C5;
    --md-sys-color-outline: #8E918F;
    --md-sys-color-outline-variant: #444746;
    --md-sys-color-surface-tint: #2B2D31;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 16px;
  line-height: 1.5;
}

/* 顶部栏 */
.app-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0 16px;
}

.app-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--md-sys-color-primary);
}

.app-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 8px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.main-content {
  flex: 1;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* M3 药丸胶囊搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 28px;
  padding: 4px 6px 4px 18px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.search-box:focus-within {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 2px 8px rgba(11, 87, 208, 0.15);
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface);
  font-size: 16px;
  outline: none;
  min-width: 0;
}

.search-box input::placeholder {
  color: var(--md-sys-color-outline);
}

.icon-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 15px;
  transition: background-color 0.2s;
}

.icon-btn:hover {
  background-color: var(--md-sys-color-surface-tint);
}

.search-action-btn {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}

.search-action-btn:active {
  opacity: 0.85;
}

/* M3 结果卡片 */
.card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: 20px;
  padding: 20px;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.word-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding-bottom: 12px;
}

.word-text {
  font-size: 26px;
  font-weight: 700;
  color: var(--md-sys-color-primary);
}

.phonetic-text {
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  font-family: monospace;
}

.audio-btn {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.star-btn {
  background-color: var(--md-sys-color-surface-tint);
  color: var(--md-sys-color-outline);
  font-size: 18px;
  line-height: 1;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.star-btn:hover {
  color: #F59E0B;
  transform: scale(1.1);
}

.star-btn.active {
  background-color: #FEF3C7;
  color: #D97706;
  text-shadow: 0 0 6px rgba(245, 158, 11, 0.3);
  transform: scale(1.05);
}

@media (prefers-color-scheme: dark) {
  .star-btn.active {
    background-color: #78350F;
    color: #FBBF24;
  }
}

/* 中文释义核心卡片 */
.cn-meanings-box {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.cn-meaning-line {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}

/* 汉英互译对译词列表 */
.zh-box-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--md-sys-color-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.en-targets-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.en-target-chip {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 12px;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.en-target-chip:hover {
  background-color: var(--md-sys-color-surface-tint);
  border-color: var(--md-sys-color-primary);
  transform: translateY(-1px);
}

.en-target-chip .arrow-icon {
  font-size: 13px;
  opacity: 0.7;
}

/* 双语例句展示 */
.sentences-box {
  margin-bottom: 16px;
}

.sentence-item {
  margin-bottom: 8px;
  padding: 10px 12px;
  background-color: var(--md-sys-color-surface-tint);
  border-radius: 10px;
}

.sentence-en {
  font-size: 14px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  line-height: 1.5;
}

.sentence-cn {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 3px;
}

.sub-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 10px;
}

/* 释义列表条目 */
.meaning-item {
  margin-bottom: 12px;
}

.part-of-speech {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  font-style: italic;
  padding: 2px 8px;
  border-radius: 6px;
  background-color: var(--md-sys-color-surface-tint);
  color: var(--md-sys-color-primary);
  margin-right: 8px;
}

.definition-text {
  font-size: 15px;
  color: var(--md-sys-color-on-surface);
}

.example-text {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 4px;
  padding-left: 10px;
  border-left: 2px solid var(--md-sys-color-primary);
}

/* 提示与状态 */
.status-tip {
  text-align: center;
  font-size: 14px;
  color: var(--md-sys-color-outline);
  padding: 24px 0;
}

/* 记录与生词本管理区 */
.records-section {
  margin-top: 8px;
}

.records-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.tabs-group {
  display: inline-flex;
  gap: 6px;
  background-color: var(--md-sys-color-surface-container);
  padding: 4px;
  border-radius: 20px;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.tab-chip {
  background: transparent;
  border: none;
  border-radius: 16px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.tab-chip:hover {
  color: var(--md-sys-color-primary);
}

.tab-chip.active {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.tab-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 10px;
  background-color: rgba(255, 255, 255, 0.25);
  line-height: 1.2;
}

.tab-chip:not(.active) .tab-badge {
  background-color: var(--md-sys-color-surface-tint);
  color: var(--md-sys-color-on-surface-variant);
}

.text-action-btn {
  background: transparent;
  border: none;
  font-size: 12px;
  color: var(--md-sys-color-outline);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.2s, background-color 0.2s;
}

.text-action-btn:hover {
  color: #BA1A1A;
  background-color: var(--md-sys-color-surface-tint);
}

.empty-tip {
  font-size: 13px;
  color: var(--md-sys-color-outline);
  text-align: center;
  padding: 24px 16px;
  background-color: var(--md-sys-color-surface-container);
  border: 1px dashed var(--md-sys-color-outline-variant);
  border-radius: 16px;
  line-height: 1.6;
}

/* 历史记录与生词本标签 Chips */
.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  background-color: var(--md-sys-color-surface-tint);
  border-color: var(--md-sys-color-primary);
}

/* 生词本特别药丸卡片 */
.starred-chip {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 16px;
  padding: 6px 10px 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  transition: all 0.2s;
}

.starred-chip:hover {
  border-color: #F59E0B;
  background-color: var(--md-sys-color-surface-tint);
  transform: translateY(-1px);
}

.starred-chip .starred-word {
  font-weight: 600;
  color: var(--md-sys-color-primary);
}

.starred-chip .starred-brief {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 12px;
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.starred-chip .remove-star-btn {
  background: transparent;
  border: none;
  color: var(--md-sys-color-outline);
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
}

.starred-chip .remove-star-btn:hover {
  color: #BA1A1A;
  background-color: rgba(186, 26, 26, 0.1);
}

/* 密钥鉴权弹窗 */
.auth-dialog {
  border: none;
  border-radius: 24px;
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  margin: auto;
  max-width: 90vw;
  width: 360px;
  padding: 24px;
}

.auth-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.auth-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.auth-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

.auth-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-desc {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 16px;
  line-height: 1.4;
}

.auth-box input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-size: 15px;
  outline: none;
  text-align: center;
}

.auth-box input:focus {
  border-color: var(--md-sys-color-primary);
}

.key-error {
  font-size: 12px;
  color: #BA1A1A;
  margin-top: 8px;
}

/* 底部版本与检查更新栏 */
.app-footer {
  margin-top: 32px;
  padding-bottom: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.version-btn {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 20px;
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  transition: all 0.2s ease;
}

.version-btn:hover {
  background-color: var(--md-sys-color-surface-tint);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-primary);
}

.version-btn:active {
  transform: scale(0.97);
}

.version-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10B981;
}

.version-text {
  font-weight: 500;
}

.update-action {
  color: var(--md-sys-color-primary);
  font-weight: 600;
}

.update-status-tip {
  font-size: 12px;
  color: var(--md-sys-color-primary);
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}