:root {
  --bg: #020617;
  --panel: #0f172a;
  --border: rgba(255,255,255,.1);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --new: #34d399;
  --cyber: #f472b6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(2,6,23,.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 600; font-size: 1.05rem; }

#tabs { display: flex; gap: 8px; }

.tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: .85rem;
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  color: #001018;
  border-color: var(--accent);
  font-weight: 600;
}

main { max-width: 880px; margin: 0 auto; padding: 24px; }

.generated-at { color: var(--muted); font-size: .8rem; margin: 0 0 16px; }

.period-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* --- Period filter: a few meaningful buckets, not one pill per calendar day (which is mostly
   empty noise until the app has weeks of history) --- */
.period-filter {
  display: flex;
  gap: 8px;
}

.calendar-picker {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: .82rem;
  color-scheme: dark;
}

.period-pill {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: .82rem;
  cursor: pointer;
}

.period-pill .count { font-weight: 700; color: var(--text); margin-right: 5px; }
.period-pill.active { border-color: var(--accent); background: rgba(56,189,248,.12); color: var(--text); }
.period-pill.active .count { color: var(--accent); }

/* --- Section headers inside the card list: Today / Yesterday / This Week / This Month --- */
.section-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 4px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.section-header:first-child { margin-top: 0; }
.section-header::after { content: ""; flex: 1; height: 1px; background: var(--border); }

/* --- Search + sort row --- */
.controls-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.search-box {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 10px;
  font-size: .85rem;
}

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

.sort-select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 12px;
  border-radius: 10px;
  font-size: .82rem;
}

/* --- Topic chips: filter within the active lane --- */
.topic-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.topic-chip {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: .74rem;
  cursor: pointer;
}

.topic-chip.active { background: var(--new); border-color: var(--new); color: #00120b; font-weight: 700; }

/* --- Cards: a collage grid, not a single flat column --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  transition: opacity .15s;
  display: flex;
  flex-direction: column;
}

.card.is-old { opacity: .62; }
.card.is-hidden { display: none; }

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.card-title { font-weight: 600; font-size: .98rem; }
.card-title a { color: var(--text); text-decoration: none; }
.card-title a:hover { color: var(--accent); }

.badge {
  font-size: .68rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
  white-space: nowrap;
}

.badge.new { background: rgba(52,211,153,.15); color: var(--new); }
.badge.age { background: rgba(255,255,255,.06); color: var(--muted); }

.card-desc { color: var(--muted); font-size: .87rem; line-height: 1.45; margin: 0 0 10px; flex-grow: 1; }

.card-meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: .78rem;
  color: var(--muted);
}

.card-meta span { display: inline-flex; align-items: center; gap: 4px; }

.source-badge {
  font-size: .68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255,255,255,.06);
  color: var(--muted);
}

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