:root {
  --bg: #0a0d14;
  --surface: #121722;
  --surface-elevated: #192030;
  --border: rgba(255, 255, 255, 0.08);
  --text: #edf2f7;
  --text-muted: #8b9bb4;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.14);
  --amber: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.15);
  --green: #34d399;
  --radius: 14px;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  line-height: 1.48;
  -webkit-font-smoothing: antialiased;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 13, 20, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  padding: calc(env(safe-area-inset-top, 12px) + 10px) 14px 10px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

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

.brand h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

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

select, .icon-btn {
  background: var(--surface-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 0.82rem;
  font-weight: 500;
}

.icon-btn {
  width: 34px;
  height: 32px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  cursor: pointer;
}

.meta-bar {
  margin-top: 6px;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.pillar-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0 8px;
  scrollbar-width: none;
}
.pillar-scroll::-webkit-scrollbar {
  display: none;
}

.chip {
  flex: 0 0 auto;
  background: var(--surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.chip.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(56, 189, 248, 0.45);
}

.segmented-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background: var(--surface);
  padding: 4px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.tab {
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-radius: 9px;
  padding: 7px 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.tab.active {
  background: var(--surface-elevated);
  color: var(--text);
}

.badge {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 1px 7px;
  font-size: 0.72rem;
}

.feed-container {
  padding: 12px 14px calc(env(safe-area-inset-bottom, 16px) + 24px);
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  transition: opacity 0.18s ease;
}

.card.is-read {
  opacity: 0.62;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: 0.72rem;
}

.pill {
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 600;
  background: var(--surface-elevated);
  color: var(--accent);
}

.score-pill {
  padding: 2px 7px;
  border-radius: 6px;
  font-weight: 700;
  background: rgba(52, 211, 153, 0.14);
  color: var(--green);
}

.fallback-pill {
  padding: 2px 7px;
  border-radius: 6px;
  font-weight: 600;
  background: var(--amber-dim);
  color: var(--amber);
}

.source-label {
  color: var(--text-muted);
  margin-left: auto;
}

.card-title {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.32;
}

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

.card-hook {
  margin: 0;
  font-size: 0.88rem;
  color: #cbd5e1;
}

.card-details {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: none;
  flex-direction: column;
  gap: 10px;
  font-size: 0.86rem;
}

.card.expanded .card-details {
  display: flex;
}

.detail-block h4 {
  margin: 0 0 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.detail-block p, .detail-block ul {
  margin: 0;
  color: #dbe4f0;
}

.detail-block ul {
  padding-left: 18px;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.action-btn {
  background: var(--surface-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.loading-state, .empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 16px;
  font-size: 0.9rem;
}