/* =============================================
   Global Hotspots — 全球热点汇总
   (c) 2025 | Dark-first, responsive dashboard
   ============================================= */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg: #0a0a0f;
  --bg-surface: #12121c;
  --bg-card: #181825;
  --bg-card-hover: #1e1e32;
  --bg-elevated: #202038;
  --border: #1e1e32;
  --border-light: #2a2a45;
  --text-primary: #e2e8f0;
  --text-secondary: #8892b0;
  --text-muted: #555d73;
  --accent: #6366f1;
  --accent-glow: rgba(99,102,241,0.25);
  --accent-text: #a5b4fc;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
  --font-sans: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono: "SF Mono","Fira Code","Consolas",monospace;
}
[data-theme="light"] {
  --bg: #f0f2f5;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f7fa;
  --bg-elevated: #f8f9fb;
  --border: #e2e5ea;
  --border-light: #eef0f4;
  --text-primary: #1a1a2e;
  --text-secondary: #5a6278;
  --text-muted: #9ca3af;
  --accent: #4f46e5;
  --accent-glow: rgba(79,70,229,0.12);
  --accent-text: #6366f1;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
}
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent-text); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition);
}
nav {
  display: flex; align-items: center; gap: 1.5rem;
  max-width: 1400px; margin: 0 auto; padding: 0 1.5rem; height: 56px;
}
.logo {
  font-size: 1.125rem; font-weight: 700; letter-spacing: 0;
  color: var(--text-primary); white-space: nowrap;
  display: flex; align-items: center; gap: 0.4rem;
}
.logo-icon {
  width: 24px; height: 24px; background: var(--accent);
  border-radius: 6px; display: inline-flex; align-items: center;
  justify-content: center; font-size: 0.75rem; color: #fff; flex-shrink: 0;
}
.tabs-wrapper {
  display: flex; align-items: center; flex: 1;
  overflow-x: auto; scrollbar-width: none; gap: 0.25rem;
}
.tabs-wrapper::-webkit-scrollbar { display: none; }
.tab {
  flex-shrink: 0; background: transparent; border: none;
  color: var(--text-secondary); font-size: 0.8125rem;
  font-family: var(--font-sans); padding: 0.25rem 0.75rem;
  height: 32px; border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--transition); white-space: nowrap;
  font-weight: 500; letter-spacing: 0;
}
.tab:hover { color: var(--text-primary); background: var(--bg-elevated); }
.tab.active { color: #fff; background: var(--accent); }
.controls { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.icon-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-secondary); width: 32px; height: 32px;
  border-radius: var(--radius-sm); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent-text); background: var(--accent-glow); }
.icon-btn:active { transform: scale(0.92); }
.icon-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.status-bar {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1400px; margin: 0 auto; padding: 0.35rem 1.5rem;
  font-size: 0.75rem; color: var(--text-muted);
  border-top: 1px solid var(--border); letter-spacing: 0;
}
.status-bar label { display: flex; align-items: center; gap: 0.35rem; cursor: pointer; user-select: none; }
.status-bar input[type="checkbox"] { accent-color: var(--accent); }
#updateStatus { display: flex; align-items: center; gap: 0.4rem; }
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #22c55e; flex-shrink: 0; display: inline-block;
}
.status-dot.loading { background: #f59e0b; animation: pulse 1.2s ease-in-out infinite; }
.status-dot.error { background: #ef4444; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
main { max-width: 1400px; margin: 0 auto; padding: 1.25rem 1.5rem 3rem; }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1rem; padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.section-header h2 { font-size: 1.1rem; font-weight: 600; letter-spacing: 0; color: var(--text-primary); }
.section-header .source-badge { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; padding: 0.15rem 0.5rem; border-radius: 4px; letter-spacing: 0; }
.section + .section { margin-top: 2rem; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 0.75rem;
}
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem;
  transition: all var(--transition); cursor: pointer;
  display: flex; flex-direction: column; gap: 0.35rem;
}
.card:hover {
  border-color: var(--accent); background: var(--bg-card-hover);
  box-shadow: var(--shadow); transform: translateY(-1px);
}
.card:active { transform: translateY(0); }
.card-top { display: flex; align-items: center; gap: 0.5rem; }
.card-rank { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); min-width: 1.5rem; font-family: var(--font-mono); letter-spacing: 0; }
.card-source { font-size: 0.65rem; font-weight: 600; text-transform: uppercase; padding: 0.08rem 0.45rem; border-radius: 3px; letter-spacing: 0.3px; line-height: 1.4; }
.card-title { font-size: 0.9rem; font-weight: 600; line-height: 1.45; color: var(--text-primary); letter-spacing: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-summary { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; letter-spacing: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; align-items: center; gap: 1rem; margin-top: auto; padding-top: 0.35rem; font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0; }
.card-meta span { display: flex; align-items: center; gap: 0.25rem; }
.card-meta svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.heat-bar { height: 2px; border-radius: 1px; background: var(--border); margin-top: 0.25rem; overflow: hidden; }
.heat-bar-fill { height: 100%; border-radius: 1px; transition: width 0.6s ease; }
.src-hackernews { background: #ff6600; color: #fff; }
.src-reddit { background: #ff4500; color: #fff; }
.src-weibo { background: #e6162d; color: #fff; }
.src-zhihu { background: #0066ff; color: #fff; }
.src-github { background: #6e5494; color: #fff; }
.bar-hackernews { background: linear-gradient(90deg,#ff6600,#ff8833); }
.bar-reddit { background: linear-gradient(90deg,#ff4500,#ff6a33); }
.bar-weibo { background: linear-gradient(90deg,#e6162d,#ff3344); }
.bar-zhihu { background: linear-gradient(90deg,#0066ff,#3388ff); }
.bar-github { background: linear-gradient(90deg,#6e5494,#9b7fc0); }
.loading-state,.error-state,.empty-state {
  grid-column: 1 / -1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 3rem 1rem; text-align: center;
  color: var(--text-secondary); gap: 0.75rem;
}
.spinner { width: 28px; height: 28px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.error-state { color: #ef4444; }
@media (max-width: 768px) {
  nav { padding: 0 1rem; gap: 0.75rem; height: 50px; }
  .logo { font-size: 1rem; }
  .tab { font-size: 0.75rem; padding: 0.25rem 0.55rem; }
  main { padding: 0.75rem 1rem 2rem; }
  .card-grid { grid-template-columns: 1fr; gap: 0.6rem; }
  .status-bar { padding: 0.3rem 1rem; font-size: 0.7rem; flex-wrap: wrap; gap: 0.25rem; }
  .section-header h2 { font-size: 1rem; }
}
@media (min-width: 769px) and (max-width: 1100px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1400px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }
.card { animation: fadeUp 0.35s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.card:nth-child(1) { animation-delay: 0s; }
.card:nth-child(2) { animation-delay: 0.03s; }
.card:nth-child(3) { animation-delay: 0.06s; }
.card:nth-child(4) { animation-delay: 0.09s; }
.card:nth-child(5) { animation-delay: 0.12s; }
.card:nth-child(6) { animation-delay: 0.15s; }
.card:nth-child(7) { animation-delay: 0.18s; }
.card:nth-child(8) { animation-delay: 0.21s; }
.card:nth-child(9) { animation-delay: 0.24s; }
.card:nth-child(10) { animation-delay: 0.27s; }
.card:nth-child(11) { animation-delay: 0.3s; }
.card:nth-child(12) { animation-delay: 0.33s; }
[data-theme="dark"] ::-webkit-scrollbar { width: 6px; height: 6px; }
[data-theme="dark"] ::-webkit-scrollbar-track { background: transparent; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
.footer-note { text-align: center; padding: 1.5rem; font-size: 0.7rem; color: var(--text-muted); border-top: 1px solid var(--border); letter-spacing: 0; max-width: 1400px; margin: 0 auto; }
.footer-note a { color: var(--accent-text); }
.card-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.15rem;
}
.suggestion-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.65rem;
  font-family: var(--font-sans);
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0;
  line-height: 1.3;
}
.suggestion-btn:hover {
  border-color: var(--accent);
  color: var(--accent-text);
  background: var(--accent-glow);
}
.suggestion-btn.open {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.suggestion-btn svg {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.suggestion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin 0.3s ease;
  opacity: 0;
  margin-top: 0;
}
.suggestion-panel.open {
  max-height: 600px;
  opacity: 1;
  margin-top: 0.5rem;
}
.suggestion-item {
  background: var(--bg-elevated);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  margin-bottom: 0.35rem;
  border-left: 2px solid var(--accent);
}
.suggestion-item:last-child {
  margin-bottom: 0;
}
.suggestion-label {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--accent-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.1rem;
}
.suggestion-text {
  font-size: 0.73rem;
  color: var(--text-secondary);
  line-height: 1.5;
  letter-spacing: 0;
}
@media (max-width: 768px) {
  .suggestion-item {
    padding: 0.4rem 0.55rem;
  }
  .suggestion-text {
    font-size: 0.7rem;
  }
}
.card.closing-suggestions .suggestion-panel.open {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
}
.search-bar {
  max-width: 1400px; margin: 0 auto; padding: 0.3rem 1.5rem;
  border-top: 1px solid var(--border);
}
.search-bar-inner {
  display: flex; align-items: center; gap: 0.4rem;
  background: var(--bg-elevated); border-radius: 6px;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}
.search-bar-inner:focus-within {
  border-color: var(--accent);
}
.search-icon {
  flex-shrink: 0;
  fill: none; stroke: var(--text-muted); stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}
.search-bar input {
  flex: 1; background: transparent; border: none;
  color: var(--text-primary); font-size: 0.8rem;
  font-family: var(--font-sans); outline: none;
  letter-spacing: 0;
}
.search-bar input::placeholder { color: var(--text-muted); }
.search-clear {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 0.7rem; padding: 0.15rem 0.3rem;
  border-radius: 3px; transition: all var(--transition);
}
.search-clear:hover { background: var(--accent-glow); color: var(--accent-text); }
#searchClear { display: none; }

.skeleton {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem;
  display: flex; flex-direction: column; gap: 0.6rem;
  pointer-events: none;
}
.skeleton-line {
  height: 12px; border-radius: 6px;
  background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--border) 50%, var(--bg-elevated) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
.skeleton-line.wide { width: 92%; }
.skeleton-line.medium { width: 68%; }
.skeleton-line.narrow { width: 42%; }
.skeleton-line.tiny { width: 22%; height: 8px; }
.skeleton-meta { display: flex; gap: 1rem; margin-top: auto; }
.skeleton-meta .skeleton-line { height: 8px; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.no-results {
  grid-column: 1 / -1; text-align: center;
  padding: 2rem 1rem; color: var(--text-muted);
  font-size: 0.85rem; letter-spacing: 0;
}

@media (max-width: 768px) {
  .search-bar { padding: 0.25rem 1rem; }
  .search-bar input { font-size: 0.75rem; }
}
.fav-btn {
  background: none; border: none; cursor: pointer;
  padding: 0; margin-left: auto; line-height: 1;
  font-size: 0.85rem; color: var(--text-muted);
  transition: all var(--transition); flex-shrink: 0;
}
.fav-btn:hover { color: #f59e0b; transform: scale(1.15); }
.fav-btn.active { color: #f59e0b; }

.tab[data-section="favorites"]:not(.active) { color: #f59e0b; }
.tab[data-section="favorites"]:not(.active):hover { background: rgba(245,158,11,0.12); }
.source-status { display: inline-flex; align-items: center; gap: 0.3rem; margin-left: 0.5rem; }
.source-status .s-stat {
  display: inline-flex; align-items: center; gap: 0.2rem;
  font-size: 0.65rem; font-weight: 500;
  opacity: 0.35; transition: opacity var(--transition); letter-spacing: 0;
}
.source-status .s-stat.ok { opacity: 1; }
.source-status .s-stat.loading { opacity: 0.6; animation: pulse 1.2s ease-in-out infinite; }
.source-status .s-stat.fail { opacity: 0.8; }
.source-status .s-stat-dot {
  width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0;
}
@media (max-width: 768px) {
  .source-status { display: none; }
  .status-bar { font-size: 0.65rem; }
}
.suggestion-panel.open {
  max-height: 800px;
  opacity: 1;
  margin-top: 0.5rem;
}
.sugg-section {
  background: var(--bg-elevated);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  margin-bottom: 0.35rem;
  border-left: 3px solid var(--border);
}
.sugg-section:last-child { margin-bottom: 0; }
.sugg-section.type-insight { border-left-color: #6366f1; }
.sugg-section.type-data { border-left-color: #22c55e; }
.sugg-section.type-action { border-left-color: #f59e0b; }
.sugg-section.type-risk { border-left-color: #ef4444; }
.sugg-header {
  display: flex; align-items: center; gap: 0.3rem;
  margin-bottom: 0.1rem;
}
.sugg-icon { font-size: 0.72rem; flex-shrink: 0; }
.sugg-label {
  font-size: 0.6rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sugg-text {
  font-size: 0.72rem; color: var(--text-secondary);
  line-height: 1.55; letter-spacing: 0;
}
.sugg-text strong {
  color: var(--accent-text); font-weight: 600;
}
.sugg-text em {
  font-style: normal; color: var(--text-primary);
  font-weight: 500;
}
@media (max-width: 768px) {
  .sugg-section { padding: 0.4rem 0.55rem; }
  .sugg-text { font-size: 0.7rem; }
}
.src-youtube { background: #FF0000; color: #fff; }
.src-bilibili { background: #00A1D6; color: #fff; }
.bar-youtube { background: linear-gradient(90deg,#FF0000,#ff4444); }
.bar-bilibili { background: linear-gradient(90deg,#00A1D6,#33bbee); }