:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-soft: #eff4ff;
  --tag: #e0ecff;
  --tag-text: #1d4ed8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-size: 32px;
}

.topbar h1 {
  font-size: 20px;
  margin: 0;
}

.sub {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
}

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

#dateSelect {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  color: var(--text);
}

#refreshBtn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 16px;
  color: var(--primary);
}

#refreshBtn:hover {
  background: var(--primary-soft);
}

.container {
  max-width: 880px;
  margin: 24px auto;
  padding: 0 16px;
}

.headline {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  border-radius: 16px;
  padding: 22px 24px;
  margin-bottom: 18px;
}

.date-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.18);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  margin-bottom: 10px;
}

.headline h2 {
  margin: 0 0 12px;
  font-size: 22px;
}

.digest {
  white-space: pre-wrap;
  font-size: 14px;
  opacity: 0.95;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.chip {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}

.chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.rank {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  min-width: 28px;
}

.item-body {
  flex: 1;
}

.item-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 6px;
}

.item-title a {
  color: var(--text);
  text-decoration: none;
}

.item-title a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.tag {
  background: var(--tag);
  color: var(--tag-text);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 6px;
}

.score {
  font-size: 12px;
  color: var(--muted);
}

.item-summary {
  font-size: 14px;
  color: #374151;
  margin: 0;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 40px 0;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 24px;
}

.hidden {
  display: none !important;
}