/* ================================================
   InfoHub — 5-Theme CSS
   Aesthetic: Japanese magazine + Notion early + print
   No AI味: no perfect alignment, no 12px+ radius, no gradients
   ================================================ */

/* ── Theme A: 纸白 (Default) ─────────────────────── */
:root {
  --bg-primary:     #FAFAF8;
  --bg-card:        #FFFFFF;
  --bg-hover:       #F5F5F0;
  --bg-input:       #FFFFFF;
  --text-primary:   #1A1A1A;
  --text-secondary: #6B6B6B;
  --text-muted:     #999999;
  --text-read:      #B0B0A8;
  --border:         #E8E8E3;
  --border-light:   #F0F0EB;
  --accent:         #C85A2A;
  --accent-hover:   #A84820;
  --tag-tech-bg:    #E8F0E8;
  --tag-tech-text:  #3A5A3A;
  --tag-data-bg:    #EDF2FA;
  --tag-data-text:  #3A5A7A;
  --tag-sec-bg:     #FAEDEA;
  --tag-sec-text:   #7A3A2A;
  --shadow:         0 1px 3px rgba(0,0,0,0.06);
  --overlay-bg:    rgba(0,0,0,0.45);
  --modal-bg:      rgba(0,0,0,0.3);
}

/* ── Theme B: 墨灰 ─────────────────────── */
[data-theme="ink"] {
  --bg-primary:     #1C1C1E;
  --bg-card:        #252527;
  --bg-hover:       #2F2F31;
  --bg-input:       #252527;
  --text-primary:   #F0F0F2;
  --text-secondary: #A8A8AD;
  --text-muted:     #6E6E73;
  --text-read:      #4A4A50;
  --border:         #38383A;
  --border-light:   #2F2F31;
  --accent:         #BF9D6A;
  --accent-hover:   #CAAA7A;
  --tag-tech-bg:    #2A352A;
  --tag-tech-text:  #8AAA8A;
  --tag-data-bg:    #2A2E3A;
  --tag-data-text:  #8A9ACA;
  --tag-sec-bg:     #3A2A2A;
  --tag-sec-text:   #CA8A8A;
  --shadow:         0 1px 3px rgba(0,0,0,0.5);
  --overlay-bg:    rgba(0,0,0,0.75);
  --modal-bg:      rgba(0,0,0,0.65);
}

/* ── Theme C: 霜蓝 ─────────────────────── */
[data-theme="frost"] {
  --bg-primary:     #F7F9FC;
  --bg-card:        #FFFFFF;
  --bg-hover:       #EDF2F7;
  --bg-input:       #FFFFFF;
  --text-primary:   #1A2638;
  --text-secondary: #5A6A7A;
  --text-muted:     #8A9AAA;
  --text-read:      #B0BEC8;
  --border:         #D8E2EC;
  --border-light:   #EEF3F8;
  --accent:         #3B6EA5;
  --accent-hover:   #2D5A8A;
  --tag-tech-bg:    #E8F2FC;
  --tag-tech-text:  #2A5A8A;
  --tag-data-bg:    #EAF0FA;
  --tag-data-text:  #3A6A9A;
  --tag-sec-bg:     #F5EBE8;
  --tag-sec-text:   #7A4A3A;
  --shadow:         0 1px 3px rgba(50,80,120,0.08);
  --overlay-bg:    rgba(20,40,70,0.45);
  --modal-bg:      rgba(20,40,70,0.3);
}

/* ── Theme D: 青瓷 ─────────────────────── */
[data-theme="celadon"] {
  --bg-primary:     #F5F8F6;
  --bg-card:        #FFFFFF;
  --bg-hover:       #ECF2EE;
  --bg-input:       #FFFFFF;
  --text-primary:   #1A2E24;
  --text-secondary: #5A6E5C;
  --text-muted:     #8A9E8C;
  --text-read:      #A0B8A8;
  --border:         #D4E0D8;
  --border-light:   #E8F0EC;
  --accent:         #3D7A5C;
  --accent-hover:   #2E5E45;
  --tag-tech-bg:    #E8F5EE;
  --tag-tech-text:  #2A5E42;
  --tag-data-bg:    #EAF5F0;
  --tag-data-text:  #2A7A62;
  --tag-sec-bg:     #FAEEE8;
  --tag-sec-text:   #7A3A2A;
  --shadow:         0 1px 3px rgba(40,80,60,0.08);
  --overlay-bg:    rgba(20,50,40,0.45);
  --modal-bg:      rgba(20,50,40,0.3);
}

/* ── Theme E: 暗红 ─────────────────────── */
[data-theme="vermilion"] {
  --bg-primary:     #1A1512;
  --bg-card:        #261E1A;
  --bg-hover:       #322824;
  --bg-input:       #261E1A;
  --text-primary:   #F2EDE8;
  --text-secondary: #A89E94;
  --text-muted:     #6A5E54;
  --text-read:      #4A4038;
  --border:         #3A302A;
  --border-light:   #2E2620;
  --accent:         #C45A3A;
  --accent-hover:   #A84828;
  --tag-tech-bg:    #282420;
  --tag-tech-text:  #8A7A6A;
  --tag-data-bg:    #2A2520;
  --tag-data-text:  #8A7A9A;
  --tag-sec-bg:     #3A2220;
  --tag-sec-text:   #CA7A6A;
  --shadow:         0 1px 3px rgba(0,0,0,0.4);
  --overlay-bg:    rgba(0,0,0,0.7);
  --modal-bg:      rgba(0,0,0,0.55);
}

/* ── Base Reset ─────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'Georgia', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s, color 0.2s;
}

/* ── Typography ─────────────────────── */
h1, h2, h3 {
  font-family: 'Noto Serif SC', 'Georgia', serif;
  font-weight: 600;
  line-height: 1.3;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

/* ── Header ─────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: 56px;
  padding: 0 24px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  gap: 24px;
}

.header-left {
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.logo-text {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.logo-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 300;
}

.nav-tabs {
  display: flex;
  gap: 2px;
  flex: 1;
}

.tab,
.bookmark-tab,
.digest-tab {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  border-radius: 5px;
  transition: background 0.15s, color 0.15s;
  /* subtle: intentional slight asymmetry */
  letter-spacing: 0.2px;
}

.tab:hover,
.bookmark-tab:hover,
.digest-tab:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tab.active,
.bookmark-tab.active,
.digest-tab.active {
  background: var(--bg-hover);
  color: var(--text-primary);
  font-weight: 500;
}

.header-right {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
}

.icon-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* ── Theme Switcher ─────────────────────── */
.theme-switcher {
  position: relative;
}

.theme-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s;
}

.theme-btn:hover {
  border-color: var(--text-muted);
}

.theme-preview {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 3px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  display: none;
  gap: 4px;
  flex-direction: column;
  min-width: 110px;
  box-shadow: var(--shadow);
  z-index: 200;
}

.theme-dropdown.open {
  display: flex;
}

.theme-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.1s;
}

.theme-option:hover {
  background: var(--bg-hover);
}

.theme-swatch {
  display: block;
  width: 20px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

.theme-name {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── Main Layout ─────────────────────── */
.main-layout {
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
  min-height: calc(100vh - 56px - 44px);
}

/* ── Sidebar ─────────────────────── */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  padding: 20px 16px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sources-toggle {
  font-size: 11px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  cursor: pointer;
  color: var(--accent);
}

.sources-toggle:hover {
  color: var(--accent-hover);
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.filter-item {
  padding: 6px 10px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  border-radius: 5px;
  text-align: left;
  transition: background 0.1s, color 0.1s;
}

.filter-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.filter-item.active {
  background: var(--bg-hover);
  color: var(--text-primary);
  font-weight: 500;
}

.sources-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.source-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.1s;
}

.source-item:hover {
  background: var(--bg-hover);
}

.source-item.active {
  background: var(--bg-hover);
  font-weight: 600;
  color: var(--accent);
}

.source-status {
  font-size: 10px;
  flex-shrink: 0;
  width: 12px;
  text-align: center;
}

.source-name {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.add-source-btn {
  margin-top: 6px;
  padding: 6px 10px;
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  border-radius: 5px;
  text-align: left;
  transition: border-color 0.15s, color 0.15s;
}

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

.sidebar-stats {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 6px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.stat-num {
  font-family: 'Georgia', serif;
  font-size: 18px;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Content ─────────────────────── */
.content {
  flex: 1;
  padding: 20px 28px;
  min-width: 0;
}

/* ── Search Bar ─────────────────────── */
.search-bar {
  position: relative;
  margin-bottom: 20px;
}

.search-input {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.search-input:focus {
  border-color: var(--accent);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
  padding: 2px 4px;
}

.search-clear:hover {
  color: var(--text-primary);
}

/* ── Articles List ─────────────────────── */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.date-group {
  margin-bottom: 4px;
}

.date-header {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  padding: 14px 0 6px 2px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 8px;
}

.article-card {
  padding: 16px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  border: 1px solid transparent;
}

.article-card:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.category-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.6;
}

.category-tag.tech {
  background: var(--tag-tech-bg);
  color: var(--tag-tech-text);
}

.category-tag.data {
  background: var(--tag-data-bg);
  color: var(--tag-data-text);
}

.category-tag.security {
  background: var(--tag-sec-bg);
  color: var(--tag-sec-text);
}

.article-source {
  font-size: 13px;
  color: var(--text-muted);
}

.trans-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  line-height: 1.5;
  font-family: inherit;
  letter-spacing: 0.1px;
  user-select: none;
}

.trans-badge.machine {
  background: var(--bg-hover);
  color: var(--text-muted);
  border: 1px solid var(--border-light);
}

.trans-badge.ai {
  background: rgba(43, 92, 127, 0.08);
  color: var(--accent);
  border: 1px solid rgba(43, 92, 127, 0.22);
  font-weight: 500;
}

.overlay-trans-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  line-height: 1.5;
}

.overlay-trans-badge.machine {
  background: var(--bg-hover);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.overlay-trans-badge.ai {
  background: rgba(43, 92, 127, 0.1);
  color: var(--accent);
  border: 1px solid rgba(43, 92, 127, 0.25);
  font-weight: 500;
}

.btn-refine-single {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 12px;
  background: transparent;
  color: var(--accent);
  border: 1px dashed var(--accent);
  border-radius: 4px;
  cursor: pointer;
  margin-left: 8px;
  transition: all 0.15s ease;
}

.btn-refine-single:hover {
  background: var(--bg-hover);
}

.btn-refine-single:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.article-dot {
  color: var(--border);
  font-size: 11px;
}

.article-time {
  font-size: 13px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.article-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card.is-read .article-title {
  color: var(--text-read);
}

.article-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.article-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-hover);
  padding: 2px 8px;
  border-radius: 3px;
  cursor: pointer;
  transition: color 0.1s;
}

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

/* ── Loading / Empty States ─────────────────────── */
.loading-state,
.empty-state,
.error-state {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* Skeleton loading animation */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 13px 12px;
  margin-bottom: 8px;
}

.skeleton-line {
  height: 16px;
  background: var(--bg-hover);
  border-radius: 3px;
  margin-bottom: 6px;
}

.skeleton-line.title {
  width: 80%;
  height: 18px;
}

.skeleton-line.subtitle {
  width: 60%;
}

.skeleton-line.short {
  width: 40%;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.loading-skeleton {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.empty-state .empty-icon {
  font-size: 28px;
  margin-bottom: 10px;
  display: block;
}

.empty-state .empty-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Load More ─────────────────────── */
.load-more {
  padding: 24px 0 8px;
  text-align: center;
}

.load-more-btn {
  padding: 9px 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.load-more-btn:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* ── Footer ─────────────────────── */
.footer {
  height: 44px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  max-width: 1280px;
  margin: 0 auto;
}

.footer-divider {
  color: var(--border);
}

.fetch-btn {
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: inherit;
  padding: 4px 10px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.fetch-btn:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.fetch-btn.loading {
  opacity: 0.6;
  cursor: default;
}

/* ── Detail Overlay ─────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.overlay-card {
  background: var(--bg-card);
  border-radius: 6px;
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 24px 28px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}

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

.overlay-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.overlay-category {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 500;
}

.overlay-category.tech {
  background: var(--tag-tech-bg);
  color: var(--tag-tech-text);
}

.overlay-category.data {
  background: var(--tag-data-bg);
  color: var(--tag-data-text);
}

.overlay-category.security {
  background: var(--tag-sec-bg);
  color: var(--tag-sec-text);
}

.overlay-source {
  font-size: 12px;
  color: var(--text-muted);
}

.overlay-time {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.overlay-close {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-left: 8px;
}

.overlay-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.overlay-title {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.overlay-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.overlay-summary {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.85;
  padding: 16px 18px;
  background: var(--bg-hover);
  border-radius: 6px;
  border-left: 3px solid var(--border);
  margin-bottom: 20px;
  white-space: pre-wrap;
}

.overlay-summary .summary-block + .summary-block {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}

.overlay-summary .summary-lang {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
  font-weight: 500;
}

.overlay-summary .summary-toggle {
  cursor: pointer;
  user-select: none;
  transition: color 0.1s;
}

.overlay-summary .summary-toggle:hover {
  color: var(--text-secondary);
}

.overlay-summary .summary-text {
  color: var(--text-secondary);
  line-height: 1.85;
}

.overlay-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
  gap: 10px;
}

.overlay-link {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

.overlay-nav {
  display: flex;
  gap: 8px;
}

.overlay-nav-btn {
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: inherit;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}

.overlay-nav-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ── Modal ─────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  background: var(--modal-bg);
  z-index: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#loginModal {
  z-index: 700;
}

#sourceModal {
  z-index: 750;
}

.modal-card {
  background: var(--bg-card);
  border-radius: 6px;
  width: 100%;
  max-width: 420px;
  padding: 24px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.modal-header h3 {
  font-size: 17px;
  color: var(--text-primary);
}

.modal-close {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 4px;
}

.modal-close:hover {
  background: var(--bg-hover);
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select {
  padding: 8px 11px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

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

.form-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 4px;
}

.btn-cancel {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.1s;
}

.btn-cancel:hover {
  background: var(--bg-hover);
}

.btn-submit {
  padding: 8px 18px;
  border: none;
  border-radius: 5px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s;
}

.btn-submit:hover {
  background: var(--accent-hover);
}

.btn-delete {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}

.btn-delete:hover {
  background: var(--tag-sec-bg);
  color: var(--tag-sec-text);
  border-color: var(--tag-sec-text);
}

/* ── Toast ─────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 13px;
  z-index: 900;
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  transition: opacity 0.2s;
}

.toast.toast-success {
  background: #3A7A4A;
  color: white;
}

.toast.toast-error {
  background: #C44A3A;
  color: white;
}

.toast.toast-warning {
  background: #B88A2A;
  color: white;
}

.toast.toast-info {
  background: var(--text-primary);
  color: var(--bg-primary);
}

/* ── Responsive ─────────────────────── */
@media (max-width: 1199px) {
  .sidebar {
    width: 180px;
  }
  .content {
    padding: 18px 20px;
  }
}

@media (max-width: 900px) {
  /* Mobile: Sidebar becomes drawer */
  .sidebar {
    position: fixed;
    top: 56px;
    left: -220px;
    height: calc(100vh - 56px);
    z-index: 100;
    transition: left 0.3s ease;
    overflow-y: auto;
    box-shadow: 2px 0 8px rgba(0,0,0,0.1);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  /* Overlay for sidebar */
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 99;
  }
  
  .sidebar-overlay.active {
    display: block;
  }
  
  /* Mobile menu button */
  .mobile-menu-btn {
    display: none;
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 101;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 20px;
    cursor: pointer;
  }
  
  .main-layout.mobile {
    padding-left: 50px;
  }
  
  .content {
    padding: 16px;
  }
}

@media (max-width: 600px) {
  .header {
    padding: 0 14px;
    gap: 10px;
    height: 48px;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .logo-sub {
    display: none;
  }
  
  .nav-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .tab,
  .bookmark-tab,
  .digest-tab {
    padding: 5px 10px;
    font-size: 13px;
    flex-shrink: 0;
  }
  
  .overlay-card {
    padding: 18px 16px;
    margin: 10px;
    max-height: calc(100vh - 20px);
  }
  
  .overlay-title {
    font-size: 18px;
  }
  
  .overlay-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .overlay-nav {
    justify-content: space-between;
  }
  
  .footer {
    flex-direction: column;
    gap: 8px;
    padding: 12px 14px;
    height: auto;
  }
  
  .footer-divider {
    display: none;
  }
}

/* ── Scrollbar ─────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ── Utility ─────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}

/* ── Admin & Settings Panel ─────────────────────── */
.modal-card.admin-modal-card {
  max-width: 660px;
  width: 95%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 22px 24px;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 14px;
}

.admin-title-area {
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-title-area h3 {
  font-size: 17px;
  margin: 0;
  color: var(--text-primary);
}

.admin-tabs {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 18px;
  padding-bottom: 2px;
  overflow-x: auto;
}

.admin-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 6px 12px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

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

.admin-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

.admin-panel {
  display: none;
}

.admin-panel.active {
  display: block;
}

/* ── LLM Settings Presets ─────────────────────── */
.preset-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.preset-btn {
  font-size: 11px;
  padding: 3px 8px;
  border: 1px dashed var(--border);
  border-radius: 4px;
  background: var(--bg-hover);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.1s;
}

.preset-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.section-divider {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 16px 0 10px;
  padding-bottom: 4px;
  border-bottom: 1px dashed var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Visitor Analytics ─────────────────────── */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.analytics-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg-hover);
}

.analytics-num {
  font-family: 'Georgia', serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.analytics-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.analytics-subtext {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.analytics-trend {
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 12px;
  margin-bottom: 16px;
  background: var(--bg-card);
}

.analytics-trend-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.trend-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  padding: 4px 0;
  border-bottom: 1px solid var(--border-light);
}

.trend-row:last-child {
  border-bottom: none;
}

.trend-date {
  width: 80px;
  color: var(--text-muted);
  font-family: 'Georgia', serif;
}

.trend-bars {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.trend-bar-pv {
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  min-width: 2px;
}

.trend-val {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: 'Georgia', serif;
  width: 50px;
  text-align: right;
}

.analytics-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.analytics-list-box {
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 12px;
  background: var(--bg-card);
}

.analytics-list-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.analytics-list-item {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  padding: 4px 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

.analytics-list-item:last-child {
  border-bottom: none;
}

.analytics-list-key {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 180px;
}

/* ── Source Management In Admin ─────────────────────── */
.admin-sources-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 6px;
  margin-bottom: 14px;
}

.admin-source-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: 4px;
  background: var(--bg-hover);
  font-size: 12px;
}

.admin-source-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.admin-source-name {
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-source-actions {
  display: flex;
  gap: 6px;
}

.btn-mini {
  padding: 2px 7px;
  font-size: 11px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
}

.btn-mini:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.btn-mini.danger {
  color: #C44A3A;
  border-color: #E8B4AC;
}

.btn-mini.danger:hover {
  background: #FAEDEA;
}

/* ── Login Modal ─────────────────────── */
.login-card {
  max-width: 380px;
  width: 90%;
  padding: 26px 24px;
}

.login-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  margin-bottom: 16px;
}

.auth-badge {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3A7A4A;
  margin-left: 4px;
}

.icon-btn.has-auth::after {
  content: '';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── Bookmarks & Syndication & Popular Tags ───────── */
.bookmark-tab {
  position: relative;
}

.bookmark-tab.active {
  color: var(--accent);
}

.feed-link-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
  text-decoration: none;
}

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

.card-bookmark-btn {
  margin-left: auto;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  line-height: 1;
}

.card-bookmark-btn:hover {
  color: var(--accent);
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.card-bookmark-btn.active {
  color: var(--accent);
}

.card-bookmark-btn.active svg {
  fill: currentColor;
}

.overlay-action-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.overlay-btn-bookmark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
  font-family: inherit;
}

.overlay-btn-bookmark:hover {
  background: var(--bg-hover);
  color: var(--accent);
  border-color: var(--border);
}

.overlay-btn-bookmark.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-hover);
}

.overlay-btn-bookmark.active svg {
  fill: currentColor;
}

.popular-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 4px 0;
}

.topic-tag {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 12px;
  padding: 3px 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.12s ease;
  font-family: inherit;
  line-height: 1.4;
}

.topic-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-hover);
}

.topic-tag.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

.topic-tag .tag-count {
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.topic-tag.active .tag-count {
  color: rgba(255, 255, 255, 0.85);
}

/* ── 每日早报 (Daily Digest) 杂志风排版 ──────────────────────────────── */
.digest-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.digest-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.digest-date-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.digest-select {
  padding: 4px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 5px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

.digest-select:focus {
  border-color: var(--accent);
}

.digest-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.digest-action-btn {
  padding: 5px 11px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 5px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
}

.digest-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.digest-action-btn:active {
  transform: translateY(1px);
}

.digest-paper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 28px 32px;
  position: relative;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

@media (max-width: 640px) {
  .digest-paper {
    padding: 18px 16px;
  }
}

.digest-header {
  border-bottom: 2px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 22px;
}

.digest-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 23px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
  line-height: 1.3;
}

.digest-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'Georgia', serif;
}

.digest-lead {
  background: var(--bg-hover);
  border-left: 3px solid var(--accent);
  border-radius: 0 5px 5px 0;
  padding: 14px 18px;
  margin-bottom: 26px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
}

.digest-lead strong {
  display: inline-block;
  margin-right: 6px;
  color: var(--accent);
}

.digest-section {
  margin-bottom: 28px;
}

.digest-section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 14px;
}

.digest-items-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.digest-item-card {
  padding: 12px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 5px;
  transition: border-color 0.15s ease;
}

.digest-item-card:hover {
  border-color: var(--border);
}

.digest-item-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.digest-item-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  text-decoration: none;
}

.digest-item-title:hover {
  color: var(--accent);
}

.digest-item-source {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  font-family: inherit;
}

.digest-item-body {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.digest-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.digest-item-tag {
  font-size: 11px;
  padding: 1px 6px;
  background: var(--bg-hover);
  color: var(--text-muted);
  border-radius: 3px;
}

.digest-footer {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}