/* SIGNAL.253: scoped styles for /breakthroughs/. Everything is prefixed .sig-* and reuses site.css variables. */
/* Readability pass (mockup): brighter muted/meta tone, scoped to this page only. */
#signal { --sig-muted: #a3aec0; --sig-body: #d3dbe7; }
#signal .intro { color: #b9c3d2; line-height: 1.65; }
.sig-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sig-muted);
  text-transform: uppercase;
  margin: -8px 0 36px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sig-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: sig-pulse 1.8s ease-in-out infinite;
}
.sig-status.is-error .sig-dot { background: var(--magenta); box-shadow: 0 0 10px var(--magenta); animation: none; }
@keyframes sig-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

.sig-feed { display: grid; gap: 52px; margin-bottom: 48px; }
.sig-loading, .sig-empty {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.16em; color: var(--sig-muted);
}
.sig-cursor { animation: sig-pulse 1s steps(1) infinite; }

.sig-day-head {
  display: flex; align-items: baseline; gap: 14px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.22em;
  color: var(--magenta); text-transform: uppercase; margin: 0 0 20px;
}
.sig-day-head::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line-hot), transparent 80%); }
.sig-day-count { color: var(--sig-muted); letter-spacing: 0.14em; }

.sig-items { list-style: none; margin: 0; padding: 0; display: grid; gap: 24px; }

/* Items reuse .node-card for the frame (border, left rail, hover). */
.sig-item.node-card { padding: 24px 26px 22px; background: rgba(12, 14, 22, 0.9); }
.sig-item.tier-confirmed::before { background: var(--cyan); opacity: 0.9; }
.sig-item.tier-worth_reading::before { background: var(--amber); opacity: 0.9; }

.sig-item-top {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; margin-bottom: 10px;
}
.sig-title {
  font-family: var(--font-display); font-size: 16px; letter-spacing: 0.06em; line-height: 1.5; margin: 0; color: #fff;
}
.sig-title a { color: #fff; font-family: inherit; font-size: inherit; letter-spacing: inherit; }
.sig-title a:hover { color: var(--cyan-hot); text-shadow: 0 0 12px var(--cyan); }

.sig-score { text-align: right; flex-shrink: 0; display: grid; gap: 6px; justify-items: end; }
.sig-score-num {
  font-family: var(--font-display); font-size: 20px; color: var(--cyan); text-shadow: 0 0 10px rgba(61, 242, 255, 0.45); line-height: 1;
}
.sig-score-num small { font-size: 12px; color: var(--sig-muted); text-shadow: none; }
.sig-item.tier-worth_reading .sig-score-num { color: var(--amber); text-shadow: 0 0 10px rgba(255, 176, 32, 0.4); }

.chip.sig-chip.tier-confirmed { color: var(--cyan); border-color: rgba(61, 242, 255, 0.45); }
.chip.sig-chip.tier-worth_reading { color: var(--amber); border-color: rgba(255, 176, 32, 0.45); }
.chip.sig-chip { font-size: 10px; }
.chip.sig-chip.tier-watchlist { color: var(--sig-muted); border-color: rgba(124, 135, 153, 0.45); }

.sig-meta {
  font-family: var(--font-mono); font-size: 12px; color: var(--sig-muted); letter-spacing: 0.06em; line-height: 1.6; margin: 0 0 14px;
}
.sig-meta .sig-domain { color: var(--violet); text-transform: uppercase; letter-spacing: 0.16em; }
.sig-summary { margin: 0 0 16px; color: var(--sig-body); font-size: 17px; line-height: 1.7; max-width: 90ch; }
.sig-links { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 0; padding: 0; list-style: none; }
.sig-links a { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; color: var(--cyan); }
.sig-links a:hover { color: #fff; }

.sig-panel {
  background: var(--surface-2); border: 1px solid var(--line); padding: 20px 22px 22px; margin: 0 0 36px;
}
.sig-panel-head {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.22em; color: var(--cyan); text-transform: uppercase; margin-bottom: 12px;
}
.sig-panel p { margin: 0 0 16px; color: #b9c3d2; font-size: 16px; line-height: 1.7; }
.sig-panel strong { color: #fff; font-weight: 600; }
.sig-fallback { border-color: var(--line-hot); }
.sig-fallback .sig-panel-head { color: var(--magenta); }
.sig-legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-family: var(--font-mono); font-size: 12px; color: var(--sig-muted); }
.sig-legend .chip { margin-right: 8px; }

/* Lead items (score 8.5+, High confirmed): panel, stronger frame, label, divider. */
.sig-item.sig-lead.node-card {
  background: linear-gradient(100deg, rgba(61, 242, 255, 0.075), rgba(14, 18, 28, 0.94) 55%);
  border-color: rgba(61, 242, 255, 0.55);
  box-shadow: 0 0 22px rgba(61, 242, 255, 0.12), inset 0 0 0 1px rgba(61, 242, 255, 0.06);
}
.sig-item.sig-lead::before { width: 5px; opacity: 1; box-shadow: 0 0 12px var(--cyan); }
.sig-lead-tag {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--cyan); margin: 0 0 12px; display: flex; align-items: center; gap: 10px;
}
.sig-lead-tag::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, rgba(61, 242, 255, 0.5), transparent 70%); }
.sig-lead .sig-title { font-size: 17px; }
.sig-split {
  display: flex; align-items: center; gap: 12px; margin: 4px 0 -4px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--sig-muted);
}
.sig-split::before, .sig-split::after { content: ""; flex: 1; height: 0; border-top: 1px dashed rgba(124, 135, 153, 0.45); }
.sig-split::before { flex: 0 0 24px; }

@media (max-width: 820px) {
  .sig-item-top { flex-direction: column; }
  .sig-score { grid-auto-flow: column; align-items: center; justify-items: start; }
  .sig-title { font-size: 15px; }
  .sig-lead .sig-title { font-size: 16px; }
  .sig-summary { font-size: 16px; line-height: 1.65; }
  .sig-item.node-card { padding: 20px 18px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .sig-dot, .sig-cursor { animation: none; }
}