:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --bg-subtle: #fbfbfd;
  --fill: #f5f5f7;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --accent: #0071e3;
  --hairline: #d2d2d7;
  --danger: #d70015;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Top nav ---------- */

.topnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
}

.topnav-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  height: 52px;
}

.wordmark {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tabs {
  display: flex;
  gap: 2px;
  background: var(--fill);
  padding: 3px;
  border-radius: 8px;
}

.tab {
  border: none;
  background: none;
  padding: 6px 14px;
  font-size: 12.5px;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}

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

.tab.active {
  background: #fff;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  font-weight: 600;
}

/* ---------- Page shell ---------- */

.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 22px 120px;
}

.tab-panel {
  animation: fadein 0.15s ease;
}

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

.hero {
  text-align: center;
  padding: 56px 0 28px;
}

.hero h1 {
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.hero-sub {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- Search ---------- */

.search-wrap {
  margin-bottom: 28px;
}

#searchInput,
#mineSearchInput {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 12px;
  background: var(--fill);
  font-size: 15px;
  color: var(--text);
  outline: none;
  font-family: inherit;
}

#searchInput::placeholder,
#mineSearchInput::placeholder {
  color: var(--text-secondary);
}

#searchInput:focus,
#mineSearchInput:focus {
  background: #ececee;
}

/* ---------- Letter nav (plain text, no icons) ---------- */

.letter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  justify-content: center;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--hairline);
}

.letter-btn {
  border: none;
  background: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
}

.letter-btn:hover {
  background: var(--fill);
  color: var(--text);
}

.letter-btn.active {
  background: var(--text);
  color: #fff;
  font-weight: 600;
}

/* ---------- Custom word form ---------- */

.add-word-wrap {
  text-align: center;
  margin-bottom: 28px;
}

.text-btn {
  border: none;
  background: none;
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  padding: 4px;
}

.text-btn:hover {
  text-decoration: underline;
}

.custom-form {
  margin: 16px auto 0;
  max-width: 420px;
  text-align: left;
  background: var(--bg-subtle);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 18px;
}

.custom-form input,
.custom-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 10px;
  font-family: inherit;
  outline: none;
  resize: vertical;
  background: #fff;
  color: var(--text);
}

.custom-form input:focus,
.custom-form textarea:focus {
  border-color: var(--accent);
}

.custom-form-actions {
  display: flex;
  gap: 8px;
}

.pill-btn {
  border: none;
  padding: 9px 18px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  background: var(--text);
  color: #fff;
}

.pill-btn.secondary {
  background: var(--fill);
  color: var(--text);
}

.pill-btn:hover {
  opacity: 0.82;
}

.custom-form-msg {
  font-size: 12px;
  margin-top: 8px;
  min-height: 14px;
}

.custom-form-msg.error {
  color: var(--danger);
}

.custom-form-msg.success {
  color: #1d7a3c;
}

/* ---------- Result list ---------- */

.result-meta {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.running-head {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 28px 0 8px;
}

.entry-list {
  display: flex;
  flex-direction: column;
}

.entry-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline);
}

.entry-main {
  min-width: 0;
}

.entry-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.entry-word {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.entry-phon {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.entry-tags {
  display: inline-flex;
  gap: 8px;
}

.entry-tag {
  font-size: 11px;
  color: var(--text-secondary);
}

.entry-trans {
  margin-top: 4px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.entry-sentence {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
  font-style: italic;
  padding-left: 12px;
  border-left: 2px solid var(--hairline);
}

.entry-sentence mark {
  background: none;
  color: var(--text);
  font-weight: 600;
  font-style: normal;
}

.entry-sentence-tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 10px;
  font-style: normal;
  color: var(--text-secondary);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 0 6px;
}

.entry-meta-line {
  margin-top: 6px;
  font-size: 11.5px;
  color: var(--text-secondary);
}

.entry-meta-line a {
  color: var(--text-secondary);
  text-decoration: none;
}

.entry-meta-line a:hover {
  text-decoration: underline;
}

.entry-actions {
  flex-shrink: 0;
  display: flex;
  gap: 8px;
}

.entry-action {
  border: 1px solid var(--hairline);
  background: none;
  color: var(--text);
  font-size: 12.5px;
  padding: 6px 14px;
  border-radius: 16px;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

.entry-action:hover {
  border-color: var(--text);
}

.entry-action.added {
  color: var(--text-secondary);
  border-color: var(--hairline);
  cursor: default;
}

.entry-action.added:hover {
  border-color: var(--hairline);
}

.entry-action.danger {
  color: var(--danger);
}

.entry-action.danger:hover {
  border-color: var(--danger);
}

.load-more-wrap {
  text-align: center;
  margin: 28px 0;
}

.empty-state,
.loading-state {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 60px 20px;
  line-height: 1.6;
}

/* ---------- Stats ---------- */

.stats-section {
  margin-bottom: 40px;
}

.stats-title {
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 4px;
}

.stats-sub {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.stat-row {
  display: grid;
  grid-template-columns: 104px 1fr 92px;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
}

.stat-label {
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stat-bar-track {
  height: 6px;
  background: var(--fill);
  border-radius: 3px;
  overflow: hidden;
}

.stat-bar-fill {
  height: 100%;
  background: var(--text);
  border-radius: 3px;
}

.stat-value {
  font-size: 11.5px;
  color: var(--text-secondary);
  text-align: right;
}

.stats-total {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 24px;
}

/* ---------- Responsive ---------- */

@media (max-width: 600px) {
  .hero {
    padding: 40px 0 22px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .page {
    padding: 0 16px 100px;
  }
  .stat-row {
    grid-template-columns: 80px 1fr 70px;
  }
}

/* ---------- 我的词库：排序 + 折叠 ---------- */

.list-toolbar {
  max-width: 720px;
  margin: 0 auto 16px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.seg {
  display: flex;
  gap: 2px;
  padding: 2px;
  background: var(--fill);
  border-radius: 980px;
}

.seg-btn {
  border: none;
  background: none;
  font-family: inherit;
  font-size: 12px;
  padding: 5px 14px;
  border-radius: 980px;
  cursor: pointer;
  color: var(--text-secondary);
  white-space: nowrap;
}

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

.seg-btn.active {
  background: var(--bg);
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

/* A–Z 排序时的字母分隔 */
.letter-divider {
  max-width: 720px;
  margin: 22px auto 2px;
  padding: 0 22px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.letter-divider:first-child {
  margin-top: 0;
}

/* 折叠：只留单词那一行，方便快速检索 */
.entry-row.collapsed {
  cursor: pointer;
  padding: 9px 0; /* 折叠后收紧行高，一屏能看更多词 */
}

.entry-row.collapsed .entry-trans,
.entry-row.collapsed .entry-sentence,
.entry-row.collapsed .entry-meta-line {
  display: none;
}

.entry-row.collapsed .entry-head {
  margin-bottom: 0;
}

/* ---------- 最近浏览 / 最近删除 面板 ---------- */

.panel-note {
  max-width: 720px;
  margin: 0 auto 20px;
  padding: 0 22px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.panel-actions {
  max-width: 720px;
  margin: 0 auto 18px;
  padding: 0 22px;
  display: flex;
  justify-content: flex-end;
}

/* ---------- LaTeX 导出面板 ---------- */

.export-panel {
  max-width: 720px;
  margin: 0 auto 22px;
  padding: 20px 22px 18px;
  background: var(--bg-subtle);
  border: 1px solid var(--hairline);
  border-radius: 14px;
}

.export-panel .panel-note {
  max-width: none;
  margin: 0 0 18px;
  padding: 0;
}

.export-panel code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  background: var(--fill);
  border-radius: 4px;
  padding: 1px 5px;
}

.export-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-bottom: 18px;
}

.export-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.export-field.wide {
  flex: 1 1 100%;
}

.export-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.export-field input[type="text"] {
  width: 100%;
  max-width: 320px;
  padding: 8px 11px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: var(--bg);
  color: var(--text);
}

.export-field input[type="text"]:focus {
  border-color: var(--accent);
}

.export-panel .seg {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  background: var(--fill);
  border-radius: 980px;
}

.export-checks {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.export-checks label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}

.export-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.export-actions .custom-form-msg {
  margin: 0;
}

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

.entry-actions {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  flex-shrink: 0;
}

.entry-added-note {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  padding: 6px 0;
}

.entry-action.confirming {
  color: var(--danger);
  border-color: var(--danger);
  font-weight: 600;
}

.text-btn.confirming {
  font-weight: 600;
}

/* ---------- 发音按钮 ---------- */

.speak-btn {
  border: 1px solid var(--hairline);
  background: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 10.5px;
  line-height: 1;
  padding: 3px 7px;
  margin-left: 5px;
  border-radius: 980px;
  cursor: pointer;
  vertical-align: 1px;
}

.speak-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.speak-btn:active {
  background: var(--fill);
}

.sentence-speak {
  display: inline-flex;
  gap: 4px;
  margin-left: 6px;
  white-space: nowrap;
  font-style: normal;
}

.entry-sentence + .entry-sentence {
  margin-top: 8px;
}

.toolbar-note {
  font-size: 11.5px;
  color: var(--text-secondary);
}

/* ---------- 设置页 ---------- */

.setting-block {
  max-width: 680px;
  margin: 0 auto 34px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--hairline);
}

.setting-block:last-child {
  border-bottom: none;
}

.setting-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.setting-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.setting-desc b {
  color: var(--text);
  font-weight: 600;
}

.setting-block .seg {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  background: var(--fill);
  border-radius: 980px;
}

/* 预览：模拟一段正文，卡片压在上面 */
.setting-preview {
  position: relative;
  margin-top: 18px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 18px;
  background: var(--bg);
  overflow: hidden;
}

.preview-page {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text);
}

.preview-card {
  position: absolute;
  right: 26px;
  top: 34px;
  width: 232px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.16);
  padding: 12px 14px;
  transition: opacity 0.12s ease;
}

.preview-card:hover {
  opacity: 1 !important;
}

.preview-card-word {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.preview-card-trans {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.entry-tag.mastered {
  color: #1d7a3c;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .entry-tag.mastered {
    color: #30d158;
  }
}

/* ---------- 深色模式 ---------- */

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --bg-subtle: #242426;
    --fill: #2c2c2e;
    --text: #f5f5f7;
    --text-secondary: #98989d;
    --accent: #0a84ff;
    --hairline: #3a3a3c;
    --danger: #ff453a;
  }

  .topnav {
    background: rgba(28, 28, 30, 0.82);
  }

  .tab.active {
    background: #3a3a3c;
    box-shadow: none;
  }

  .custom-form input,
  .custom-form textarea {
    background: #1c1c1e;
  }

  /* 深色下 --text 变成浅色，白字会看不见，改用背景色当字色 */
  .letter-btn.active,
  .pill-btn {
    color: var(--bg);
  }
}

/* ── 同步到 kucha.org ── */
.cloud-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
.cloud-row input[type="password"] {
  flex: 1 1 220px; min-width: 180px; padding: 7px 10px;
  border: 1px solid var(--line, #d8d8d8); border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px;
}
.cloud-auto { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-size: 13px; }
.cloud-auto input { margin: 0; }
.cloud-status {
  margin-top: 10px; font-size: 12.5px; line-height: 1.7;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.cloud-status.ok { color: #2ea043; }
.cloud-status.bad { color: #d1242f; }