/* Signal — section-specific styles. Layered on top of site.css. */

/* Landing page list ------------------------------------------------------- */

.signal-intro {
  padding: 60px 0 20px;
}

.signal-intro p {
  color: var(--muted);
  max-width: 720px;
  margin: 0;
}

.signal-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 8px;
}

.signal-filter {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.signal-filter:hover,
.signal-filter[aria-pressed="true"] {
  background: var(--brand);
  color: var(--brand-contrast);
  border-color: var(--brand);
}

.signal-list {
  padding: 20px 0 60px;
}

.signal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  display: block;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.signal-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.16);
}

.signal-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.signal-card h2 {
  margin: 0 0 8px;
  font-size: 1.3rem;
}

.signal-card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.signal-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Chips ------------------------------------------------------------------- */

.signal-chip {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.signal-chip-link {
  background: rgba(29, 78, 216, 0.1);
  color: var(--brand-dark);
  border-color: rgba(29, 78, 216, 0.25);
}

.signal-chip-roundup {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-dark);
  border-color: rgba(245, 158, 11, 0.35);
}

.signal-chip-note {
  background: rgba(15, 23, 42, 0.06);
  color: var(--text);
  border-color: var(--border);
}

.tag-light {
  background: var(--surface-alt);
  color: rgba(15, 23, 42, 0.78);
  border: 1px solid var(--border);
  font-size: 0.78rem;
}

/* Single post ------------------------------------------------------------- */

.signal-post {
  padding: 60px 0 80px;
}

.signal-post .container {
  max-width: 760px;
  margin: 0 auto;
}

.signal-eyebrow {
  margin: 0 0 16px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.signal-eyebrow a {
  color: var(--brand);
}

.signal-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.signal-post h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 16px;
}

.signal-lead {
  font-size: 1.15rem;
  color: var(--text);
  margin: 0 0 32px;
}

.signal-body p,
.signal-item p {
  font-size: 1.02rem;
  margin: 0 0 16px;
}

.signal-items {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin: 0 0 40px;
}

.signal-item {
  border-left: 3px solid var(--brand);
  padding-left: 20px;
}

.signal-item h2 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

/* Per-item OG thumbnail injected by build-signal.ps1.
   Treated as an optional enhancement: if missing (older post or fetch failed),
   the item still reads cleanly without it. */
.signal-item-thumb {
  margin: 0 0 16px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-alt, #f1f5f9);
  border: 1px solid var(--border, #e2e8f0);
  aspect-ratio: 16 / 9;
  max-height: 220px;
}

.signal-item-thumb a {
  display: block;
  width: 100%;
  height: 100%;
  text-decoration: none;
}

.signal-item-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, opacity 0.2s ease;
}

.signal-item-thumb a:hover img,
.signal-item-thumb a:focus-visible img {
  transform: scale(1.02);
  opacity: 0.95;
}

.signal-source-inline {
  font-size: 0.92rem;
  color: var(--muted);
}

.signal-source-inline a {
  color: var(--brand);
  text-decoration: underline;
}

.signal-sources {
  margin: 32px 0;
  padding: 20px 24px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.signal-sources h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.signal-sources ul {
  margin: 0;
  padding-left: 20px;
}

.signal-sources a {
  color: var(--brand);
  text-decoration: underline;
}

.signal-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.signal-back {
  margin-top: 32px;
}

/* Empty state ------------------------------------------------------------- */

.signal-empty {
  padding: 40px 24px;
  text-align: center;
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  border-radius: 14px;
  color: var(--muted);
}