:root {
  --reader-sidebar-width: 208px;
  --reader-gutter: clamp(16px, 2.4vw, 32px);
  --reader-main-max: 1440px;
  --reader-platform: #53657a;
}

.shell.app-layout {
  display: grid;
  grid-template-columns: var(--reader-sidebar-width) minmax(0, 1fr);
  width: min(100%, 1760px);
  max-width: 1760px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 0;
}

.app-sidebar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  min-width: 0;
  height: 100vh;
  height: 100dvh;
  border-right: 1px solid var(--line-soft);
  background: var(--surface);
}

.app-sidebar .hero {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  margin: 0;
  padding: 24px 16px 18px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.app-sidebar .hero-main,
.app-sidebar .hero-headline {
  min-width: 0;
}

.app-sidebar .hero-headline {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-sidebar .hero-headline > div {
  min-width: 0;
}

.app-sidebar .hero-logo {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(18, 106, 115, 0.16);
  border-radius: var(--radius);
  background: var(--surface);
}

.app-sidebar .hero h1 {
  margin: 3px 0 0;
  font-size: 18px;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.app-sidebar .hero-tag {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 760;
}

.sidebar-nav {
  min-height: 0;
  margin: 28px 0 18px;
  overflow-y: auto;
}

.app-sidebar .section-tabs {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: visible;
  padding: 0;
}

.app-sidebar .section-tab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 13px;
  text-align: left;
}

.app-sidebar .section-tab span,
.app-sidebar .section-tab strong {
  line-height: 1;
  white-space: nowrap;
}

.app-sidebar .section-tab:hover {
  border-color: var(--line-soft);
  background: var(--surface-soft);
  color: var(--ink);
}

.app-sidebar .section-tab.active {
  border-color: var(--line);
  background: var(--ink);
  color: var(--surface);
}

.app-sidebar .section-tab strong {
  min-width: 2ch;
  border-radius: 999px;
  padding: 3px 5px;
  color: inherit;
  background: rgba(128, 128, 128, 0.08);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.app-sidebar .section-tab.active strong {
  background: rgba(255, 255, 255, 0.16);
}

.app-sidebar .hero-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.app-sidebar .hero-links {
  display: grid;
  grid-template-columns: 1fr;
  width: 100%;
  gap: 6px;
}

.app-sidebar .hero-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  color: var(--ink-soft);
  background: transparent;
  font-size: 12px;
  font-weight: 720;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.app-sidebar .hero-link:hover {
  border-color: rgba(18, 106, 115, 0.34);
  background: var(--surface-soft);
  color: var(--accent);
}

.app-main {
  min-width: 0;
  padding: 24px var(--reader-gutter) 56px;
}

.app-main > * {
  width: min(100%, var(--reader-main-max));
  margin-right: auto;
  margin-left: auto;
}

.main-header {
  display: grid;
  gap: 14px;
  margin-bottom: 16px;
}

.main-header .section-summary {
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
  text-align: left;
}

.main-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

.main-toolbar .primary-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  min-width: 0;
  margin: 0;
  gap: 10px;
  align-items: center;
}

.main-toolbar #searchInput {
  min-width: 0;
}

.main-toolbar .list-sort-tools {
  display: inline-flex;
  max-width: 100%;
  flex-wrap: nowrap;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
}

.main-toolbar .list-sort-btn {
  min-width: 52px;
  min-height: 36px;
  border: 0;
  border-left: 1px solid var(--line);
  padding: 0 10px;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  white-space: nowrap;
}

.main-toolbar .list-sort-btn:first-child {
  border-left: 0;
}

.main-toolbar .list-sort-btn.active {
  color: #fff;
  background: var(--accent);
  font-weight: 780;
}

.main-header .advanced-panel {
  margin: 0;
}

.app-main .sticky-summary-bar {
  position: sticky;
  z-index: 9;
  top: 0;
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  border: 1px solid rgba(23, 23, 23, 0.08);
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--muted);
  background: rgba(246, 246, 242, 0.92);
  backdrop-filter: blur(12px);
  font-size: 12px;
}

.app-main .sticky-summary-bar strong {
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 12px;
}

.app-main .sticky-summary-bar span {
  min-width: 0;
  overflow: hidden;
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-wrap {
  margin-top: 18px;
}

.list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  padding: 0 2px;
}

.list-head h2 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
}

.list-head-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
}

.news-list {
  display: grid;
  min-width: 0;
  gap: 12px;
}

.timeline-day {
  min-width: 0;
}

.timeline-day + .timeline-day {
  margin-top: 8px;
}

.timeline-day-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 2px 10px;
  border-bottom: 1px solid var(--line-soft);
}

.timeline-date {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.2;
}

.timeline-day-meta {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.timeline-day-items {
  --timeline-time-width: 52px;
  --timeline-rail-width: 18px;
  --timeline-column-gap: 8px;
  position: relative;
  display: grid;
  gap: 10px;
  padding-top: 10px;
}

.timeline-day-items > .explore-signal {
  margin-left: calc(var(--timeline-time-width) + var(--timeline-column-gap) + var(--timeline-rail-width));
}

.timeline-day-items::before {
  content: "";
  position: absolute;
  top: 15px;
  bottom: 15px;
  left: calc(var(--timeline-time-width) + var(--timeline-column-gap) + (var(--timeline-rail-width) / 2) - 1px);
  width: 2px;
  border-radius: 999px;
  background: var(--line);
}

.timeline-row {
  display: grid;
  grid-template-columns: var(--timeline-time-width) var(--timeline-rail-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--timeline-column-gap);
  min-width: 0;
}

.timeline-time {
  padding-top: 14px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  text-align: right;
  white-space: nowrap;
}

.timeline-rail {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding-top: 15px;
}

.timeline-dot {
  width: 9px;
  height: 9px;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--reader-platform);
  box-shadow: 0 0 0 1px var(--reader-platform);
}

.news-card {
  --reader-platform: #53657a;
  display: grid;
  min-width: 0;
  gap: 8px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--reader-platform);
  border-radius: 8px;
  padding: 12px 14px;
  background: var(--surface);
}

.news-card:hover {
  border-color: color-mix(in srgb, var(--reader-platform) 42%, var(--line-soft));
  border-left-color: var(--reader-platform);
  background: #fff;
}

.platform-bilibili { --reader-platform: #1687a7; }
.platform-douyin { --reader-platform: #20242b; }
.platform-xiaohongshu { --reader-platform: #d44747; }
.platform-wechat { --reader-platform: #27885b; }
.platform-youtube { --reader-platform: #c83c3c; }
.platform-github { --reader-platform: #59636f; }
.platform-aihot { --reader-platform: #c45c26; }
.platform-rss { --reader-platform: #8a6b37; }

.meta-row {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.card-avatar {
  display: inline-flex;
  flex: 0 0 26px;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--reader-platform);
  border-radius: 50%;
  color: var(--ink);
  background: var(--surface);
  font-size: 12px;
  font-weight: 780;
  line-height: 1;
}

.site {
  min-width: 0;
  max-width: min(260px, 45vw);
  overflow: hidden;
  color: var(--ink-soft);
  font-weight: 720;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.time {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.timeline-mode .news-card .time {
  display: none;
}

.title {
  display: inline-flex;
  min-width: 0;
  flex-direction: column;
  gap: 3px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.42;
  overflow-wrap: anywhere;
  text-decoration: none;
  word-break: break-word;
}

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

.title-sub {
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.35;
}

.news-summary {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.item-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1px;
}

.flat-mode {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.flat-mode > .list-more-btn {
  grid-column: 1 / -1;
}

.group-mode {
  gap: 14px;
}

.group-mode .site-group {
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.group-mode .site-group + .site-group {
  border-top: 1px solid var(--line-soft);
}

.group-mode .source-group-list {
  gap: 8px;
  padding: 8px;
}

@media (max-width: 960px) {
  .shell.app-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .app-sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .app-sidebar .hero {
    padding: 16px var(--reader-gutter) 12px;
  }

  .sidebar-nav {
    margin: 12px 0 10px;
    overflow-x: auto;
    overflow-y: hidden;
  }

  .app-sidebar .section-tabs {
    flex-direction: row;
    width: max-content;
    min-width: 100%;
  }

  .app-sidebar .section-tab {
    flex: 0 0 auto;
    width: auto;
    min-height: 40px;
    gap: 8px;
  }

  .app-sidebar .hero-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, auto));
    align-items: center;
    margin-top: 0;
    padding-top: 10px;
  }

  .app-sidebar .hero-links {
    grid-column: 1 / -1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .app-main {
    padding: 18px var(--reader-gutter) 48px;
  }

  .app-main .sticky-summary-bar {
    position: static;
  }

  .flat-mode {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --reader-gutter: 12px;
  }

  .app-sidebar .hero {
    padding: 10px var(--reader-gutter) 8px;
  }

  .app-sidebar .hero-headline {
    gap: 8px;
  }

  .app-sidebar .hero-logo {
    width: 32px;
    height: 32px;
  }

  .app-sidebar .hero h1 {
    margin-top: 1px;
    font-size: 16px;
  }

  .app-sidebar .hero-tag {
    margin-bottom: 1px;
    font-size: 8px;
  }

  .sidebar-nav {
    margin: 8px 0 6px;
  }

  .app-sidebar .section-tabs {
    gap: 3px;
  }

  .app-sidebar .section-tab {
    min-height: 40px;
    gap: 6px;
    padding: 7px 9px;
    font-size: 12px;
  }

  .app-sidebar .hero-meta {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 5px;
    padding-top: 6px;
  }

  .app-sidebar .updated-label {
    display: none;
  }

  .app-sidebar .updated,
  .app-sidebar .data-source-pill,
  .app-sidebar .source-status-pill {
    min-height: 26px;
    padding: 4px 7px;
    font-size: 11px;
  }

  .app-sidebar .hero-links {
    flex: 1 0 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
  }

  .app-sidebar .hero-link {
    min-height: 40px;
    padding: 6px 8px;
  }

  .app-main {
    padding: 12px var(--reader-gutter) 36px;
  }

  .main-header {
    gap: 8px;
    margin-bottom: 8px;
  }

  .main-header .section-summary {
    display: -webkit-box;
    overflow: hidden;
    font-size: 12px;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .main-toolbar {
    grid-template-columns: minmax(0, 1fr);
    gap: 7px;
  }

  .main-toolbar .primary-controls {
    grid-template-columns: minmax(0, 1fr);
  }

  .main-toolbar .mode-hint {
    display: none;
  }

  .main-toolbar .list-sort-tools {
    width: 100%;
    overflow-x: auto;
  }

  .main-toolbar .list-sort-btn {
    flex: 1 0 54px;
    min-height: 40px;
  }

  .main-header .advanced-panel > summary {
    min-height: 40px;
    padding-top: 9px;
    padding-bottom: 9px;
  }

  .app-main .stats {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 0;
    padding: 6px 8px;
    overflow-x: auto;
    white-space: nowrap;
  }

  .app-main .stat-prefix {
    display: none;
  }

  .app-main .stat {
    display: inline-flex;
    min-width: max-content;
    gap: 3px;
    border: 0;
    padding: 0;
    background: transparent;
  }

  .app-main .stat + .stat::before {
    display: block;
  }

  .app-main .stat .k,
  .app-main .stat .v {
    font-size: 11px;
  }

  .app-main .sticky-summary-bar {
    margin-top: 7px;
    padding: 6px 8px;
  }

  .app-main .sticky-summary-bar strong {
    display: none;
  }

  .app-main .sticky-summary-bar span {
    width: 100%;
    text-align: left;
  }

  .list-wrap {
    margin-top: 12px;
  }

  .list-head {
    margin-bottom: 6px;
  }

  .list-head h2 {
    font-size: 18px;
  }

  .timeline-day-head {
    padding: 6px 0 8px;
  }

  .timeline-date {
    font-size: 16px;
  }

  .timeline-day-items {
    --timeline-time-width: 44px;
    --timeline-rail-width: 18px;
    --timeline-column-gap: 6px;
    gap: 8px;
    padding-top: 8px;
  }

  .timeline-day-items::before {
    top: 13px;
    bottom: 13px;
  }

  .timeline-time {
    padding-top: 12px;
    font-size: 11px;
  }

  .timeline-rail {
    padding-top: 13px;
  }

  .news-card {
    gap: 6px;
    padding: 10px;
  }

  .meta-row {
    gap: 5px;
  }

  .card-avatar {
    flex-basis: 24px;
    width: 24px;
    height: 24px;
  }

  .site {
    max-width: 150px;
  }

  .title {
    font-size: 15px;
  }

  .news-summary {
    font-size: 12px;
  }

  .category,
  .source,
  .ai-tag,
  .meta-row .signal-tag {
    padding: 2px 5px;
    font-size: 10px;
  }
}