/* ============================================
   全局变量&主题
   ============================================ */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f7f4;
  --bg-tertiary: #f0efe8;
  --text-primary: #1a1a1a;
  --text-secondary: #555;
  --text-tertiary: #999;
  --border-color: #e0dfd8;
  --border-hover: #c8c7c0;
  --accent-bg: #faece7;
  --accent-text: #993c1d;
  --accent-border: #d85a30;
  --highlight-bg: #f5c4b3;
  --info-bg: #e6f1fb;
  --info-text: #185fa5;
  --success-bg: #eaf3de;
  --success-text: #3b6d11;
  --warning-bg: #faeeda;
  --warning-text: #854f0b;
  --danger-bg: #fcebeb;
  --danger-text: #a32d2d;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 10px;
  --radius-sm: 6px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
}

/* 暗色模式 */
[data-theme="dark"] {
  --bg-primary: #1a1a1e;
  --bg-secondary: #252528;
  --bg-tertiary: #2c2c30;
  --text-primary: #e8e8e8;
  --text-secondary: #aaa;
  --text-tertiary: #777;
  --border-color: #3a3a3e;
  --border-hover: #505054;
  --accent-bg: #3c2a22;
  --accent-text: #f0997b;
  --info-bg: #1a2a3a;
  --info-text: #85b7eb;
  --success-bg: #1a2a1a;
  --success-text: #97c459;
  --warning-bg: #2a2a1a;
  --warning-text: #ef9f27;
  --danger-bg: #2a1a1a;
  --danger-text: #f09595;
  --shadow: 0 2px 12px rgba(0,0,0,0.2);
}

/* ============================================
   全局样式
   ============================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}
input, textarea, select, button { font-family: inherit; font-size: inherit; }
button {
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: 13px;
  transition: opacity 0.15s;
}
button:hover { opacity: 0.85; }
button:active { opacity: 0.7; }
input[type="text"],
input[type="url"],
textarea {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 9px 13px;
  outline: none;
  transition: border-color 0.15s;
}
input:focus, textarea:focus { border-color: var(--accent-border); }
textarea { resize: vertical; }

/* ============================================
   应用布局
   ============================================ */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
  background: var(--bg-primary);
  box-shadow: var(--shadow);
}

/* 顶部导航 */
.nav-bar {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 0 4px;
  flex-shrink: 0;
}
.nav-item {
  padding: 13px 24px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  user-select: none;
}
.nav-item:hover { color: var(--text-primary); }
.nav-item.active {
  color: var(--text-primary);
  font-weight: 600;
  border-bottom-color: var(--accent-border);
}
.nav-spacer { flex: 1; }
.nav-badge {
  font-size: 11px;
  color: var(--accent-text);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 6px;
}

/* 页面容器 */
.page {
  display: none;
  flex: 1;
  overflow: hidden;
}
.page.active { display: flex; }

/* ============================================
   页面一：原文录�?   ============================================ */
.page-input {
  flex-direction: column;
  padding: 28px 32px;
  overflow-y: auto;
}
.page-input .section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.page-input .section-desc {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}
.page-input .url-row {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
}
.page-input .url-row input { flex: 1; }
.page-input .url-row button {
  background: var(--info-bg);
  color: var(--info-text);
  font-weight: 500;
  white-space: nowrap;
}
.page-input .divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 22px 0;
}
.page-input .divider-line {
  flex: 1;
  height: 1px;
  background: var(--border-color);
}
.page-input .divider-text {
  font-size: 12px;
  color: var(--text-tertiary);
}
.page-input #inputTextarea {
  width: 100%;
  min-height: 200px;
  line-height: 1.7;
  font-size: 14px;
}
.page-input .input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}
.page-input .input-footer-left { display: flex; gap: 8px; }
.page-input .input-footer-left button {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 12px;
}
.page-input .input-footer-right { display: flex; gap: 10px; }
.page-input .input-footer-right button:first-child {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}
.page-input .input-footer-right .btn-save {
  background: var(--accent-bg);
  color: var(--accent-text);
  font-weight: 600;
}
.page-input #fetchStatus {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 6px;
  min-height: 18px;
}

/* ============================================
   页面二：语料�?阅读
   ============================================ */
.page-library {
  flex-direction: row;
}

/* 左侧文章列表 */
.library-sidebar {
  width: 270px;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.library-sidebar .search-box {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}
.library-sidebar .search-box input { width: 100%; }
.library-sidebar .article-list {
  flex: 1;
  overflow-y: auto;
}
.article-item {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background 0.1s;
}
.article-item:hover { background: var(--bg-secondary); }
.article-item.active { background: var(--info-bg); }
.article-item .title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-item .meta {
  font-size: 12px;
  color: var(--text-tertiary);
  display: flex;
  gap: 12px;
}
.article-item .progress-bar {
  margin-top: 7px;
  height: 3px;
  background: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
}
.article-item .progress-bar .fill {
  height: 100%;
  background: var(--accent-border);
  border-radius: 2px;
  transition: width 0.3s;
}

/* 右侧阅读视图 */
.library-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}
.reader-toolbar {
  padding: 12px 22px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.reader-toolbar .info { flex: 1; }
.reader-toolbar .info .title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.reader-toolbar .info .meta {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 1px;
}
.reader-toolbar .actions { display: flex; gap: 8px; }
.reader-toolbar .actions button {
  font-size: 12px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
}
.reader-toolbar .actions button:hover {
  background: var(--bg-secondary);
}

/* 阅读内容 */
.reader-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
  line-height: 1.9;
  font-size: 15px;
  color: var(--text-primary);
}
.reader-content p { margin-bottom: 16px; }
.reader-content .word {
  cursor: pointer;
  border-bottom: 1.5px dashed transparent;
  padding: 1px 0;
  transition: all 0.1s;
  border-radius: 2px;
}
.reader-content .word:hover {
  background: var(--accent-bg);
  border-bottom-color: var(--accent-border);
}
.reader-content .word.marked {
  background: var(--accent-bg);
  border-bottom: 1.5px dashed var(--accent-border);
}
.reader-content .sentence-selected {
  background: var(--info-bg);
  border-radius: 3px;
}
.reader-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 14px;
  gap: 12px;
}
.reader-empty .icon { font-size: 40px; opacity: 0.4; }

/* 查词弹出�?*/
.word-popup {
  position: absolute;
  right: 30px;
  top: 80px;
  width: 370px;
  max-height: calc(100% - 100px);
  overflow-y: auto;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  z-index: 100;
  display: none;
}
.word-popup.show { display: block; }
.word-popup .popup-header {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.word-popup .popup-header .word-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}
.word-popup .popup-header .phonetic {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.word-popup .popup-header .pos {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 1px;
}
.word-popup .popup-header .popup-actions { display: flex; gap: 6px; align-items: center; }
.word-popup .popup-header .popup-actions button {
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 5px;
}
.word-popup .popup-header .btn-listen {
  background: var(--info-bg);
  color: var(--info-text);
}
.word-popup .popup-header .btn-save-kb {
  background: var(--accent-bg);
  color: var(--accent-text);
  font-weight: 500;
}
.word-popup .popup-header .btn-save-kb.saved {
  background: var(--success-bg);
  color: var(--success-text);
}
.word-popup .popup-header .btn-close {
  background: transparent;
  color: var(--text-tertiary);
  font-size: 18px;
  padding: 4px 8px;
  line-height: 1;
}
.word-popup .popup-body { padding: 14px 20px; }
.word-popup .popup-section { margin-bottom: 14px; }
.word-popup .popup-section:last-child { margin-bottom: 0; }
.word-popup .popup-section .label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 5px;
}
.word-popup .popup-section .body-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.word-popup .popup-section .body-text .example-word {
  color: var(--accent-text);
  font-weight: 600;
}
.word-popup .popup-loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-tertiary);
  font-size: 13px;
}
.word-popup .popup-loading .spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-border);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 句子浮层 */
.sentence-popup {
  position: absolute;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  z-index: 99;
  padding: 14px 18px;
  display: none;
  max-width: 460px;
}
.sentence-popup.show { display: block; }
.sentence-popup .orig { font-size: 14px; color: var(--text-primary); margin-bottom: 6px; }
.sentence-popup .trans { font-size: 13px; color: var(--text-secondary); }
.sentence-popup .grammar { font-size: 12px; color: var(--text-tertiary); margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border-color); }

/* ============================================
   页面三：知识�?复习
   ============================================ */
.page-knowledge {
  flex-direction: column;
}

/* 统计头部 */
.kb-stats {
  display: flex;
  gap: 12px;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}
.kb-stats .stat-card {
  flex: 1;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: center;
  min-width: 90px;
}
.kb-stats .stat-card .stat-label {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.kb-stats .stat-card .stat-value {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}
.kb-stats .stat-card .stat-value.warning { color: var(--warning-text); }
.kb-stats .stat-card .stat-value.success { color: var(--success-text); }

/* 主体 */
.kb-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* 左侧：艾宾浩斯时间轴 */
.kb-timeline {
  width: 210px;
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  flex-shrink: 0;
}
.kb-timeline .tl-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.1s;
}
.kb-timeline .tl-item:hover { background: var(--bg-secondary); }
.kb-timeline .tl-item.active { background: var(--info-bg); }
.kb-timeline .tl-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.kb-timeline .tl-item .tl-text { flex: 1; }
.kb-timeline .tl-item .tl-label { font-size: 13px; color: var(--text-primary); }
.kb-timeline .tl-item .tl-count {
  font-size: 11px;
  color: var(--text-tertiary);
}
.kb-timeline .tl-item .tl-count.due { color: var(--accent-text); font-weight: 600; }
.kb-timeline .tl-footer {
  padding: 14px 16px;
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* 右侧：知识点卡片 */
.kb-cards {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}
.kb-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}
.kb-card:hover { border-color: var(--border-hover); }
.kb-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}
.kb-card .card-header .card-word {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}
.kb-card .card-header .card-phonetic {
  font-size: 13px;
  color: var(--text-secondary);
  margin-left: 8px;
}
.kb-card .card-header .card-pos {
  font-size: 12px;
  color: var(--text-tertiary);
}
.kb-card .card-header .card-badge {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 5px;
  font-weight: 500;
}
.kb-card .card-badge.unknown { background: var(--danger-bg); color: var(--danger-text); }
.kb-card .card-badge.fuzzy { background: var(--warning-bg); color: var(--warning-text); }
.kb-card .card-badge.mastered { background: var(--success-bg); color: var(--success-text); }
.kb-card .card-def {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}
.kb-card .card-sentence {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.6;
  border-left: 2px solid var(--border-color);
  padding-left: 12px;
  margin-bottom: 10px;
}
.kb-card .card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.kb-card .card-footer .card-actions { display: flex; gap: 4px; }
.kb-card .card-footer .card-btn {
  width: 30px;
  height: 24px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 24px;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-tertiary);
  padding: 0;
  transition: all 0.1s;
}
.kb-card .card-footer .card-btn:hover { opacity: 0.8; }
.kb-card .card-footer .card-btn.btn-yes { color: var(--success-text); border-color: var(--success-text); }
.kb-card .card-footer .card-btn.btn-yes.active { background: var(--success-bg); }
.kb-card .card-footer .card-btn.btn-so { color: var(--warning-text); border-color: var(--warning-text); }
.kb-card .card-footer .card-btn.btn-so.active { background: var(--warning-bg); }
.kb-card .card-footer .card-btn.btn-no { color: var(--danger-text); border-color: var(--danger-text); }
.kb-card .card-footer .card-btn.btn-no.active { background: var(--danger-bg); }
.kb-card .card-footer .card-link {
  font-size: 12px;
  color: var(--info-text);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}
.kb-card .card-footer .card-link:hover { text-decoration: underline; }

/* 句子类型卡片 */
.kb-card.card-sentence .card-header .card-word {
  font-size: 14px;
  font-weight: 500;
}

/* 知识库空状�?*/
.kb-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  gap: 10px;
}
.kb-empty .icon { font-size: 36px; opacity: 0.4; }

/* ============================================
   页面四：设置
   ============================================ */
.page-settings {
  flex-direction: column;
  padding: 28px 32px;
  overflow-y: auto;
}
.page-settings .settings-section {
  margin-bottom: 28px;
}
.page-settings .settings-section .section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
.page-settings .settings-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.page-settings .settings-row label {
  width: 110px;
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.page-settings .settings-row input[type="text"],
.page-settings .settings-row input[type="password"] {
  flex: 1;
  max-width: 400px;
}
.page-settings .settings-row .hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-left: 124px;
  margin-top: -6px;
  margin-bottom: 10px;
}
.page-settings .btn-save-setting {
  background: var(--accent-bg);
  color: var(--accent-text);
  font-weight: 500;
  margin-left: 124px;
}
.page-settings .settings-actions { display: flex; gap: 10px; margin-left: 124px; }
.page-settings .settings-actions button {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 12px;
}

/* 开关样�?*/
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
  display: inline-block;
}
.toggle-switch input { display: none; }
.toggle-switch .slider {
  position: absolute;
  inset: 0;
  background: var(--border-color);
  border-radius: 12px;
  transition: 0.2s;
}
.toggle-switch .slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 2px;
  top: 2px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}
.toggle-switch input:checked + .slider { background: var(--accent-border); }
.toggle-switch input:checked + .slider::before { transform: translateX(20px); }

/* ============================================
   提示消息
   ============================================ */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.toast.show { opacity: 1; }

/* ============================================
   滚动条美�?   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ============================================
   响应�?   ============================================ */
/* ============================================
   移动端适配
   ============================================ */
@media (max-width: 768px) {
  .library-sidebar { width: 200px; }
  .kb-timeline { width: 160px; }
  .word-popup {
    right: 10px;
    left: 10px;
    width: auto;
    top: 70px;
  }
  .kb-stats { flex-wrap: wrap; }
  .kb-stats .stat-card { min-width: 70px; }
  .reader-content { font-size: 16px; padding: 16px 18px; }
  .page-input { padding: 18px 16px; }
  .page-settings { padding: 18px 16px; }
  .nav-item { padding: 12px 14px; font-size: 13px; }
  .input-footer { flex-direction: column; gap: 10px; }
  .input-footer-left, .input-footer-right { width: 100%; }
  .input-footer-right { justify-content: flex-end; }
}

/* 手机竖屏极窄适配 */
@media (max-width: 480px) {
  .library-sidebar { width: 140px; }
  .kb-timeline { width: 120px; }
  .kb-timeline .tl-item { padding: 10px 12px; font-size: 12px; }
  .kb-cards { padding: 10px 12px; }
  .kb-card { padding: 14px 14px; }
  .reader-toolbar { padding: 10px 14px; flex-wrap: wrap; }
  .reader-toolbar .actions { width: 100%; justify-content: flex-end; }
  .nav-item { padding: 10px 10px; font-size: 12px; }
  .word-popup { right: 6px; left: 6px; top: 60px; width: auto; }
  .word-popup .popup-header { padding: 12px 14px; }
  .word-popup .popup-body { padding: 10px 14px; }
}