/* ================================================================
   ORION Observatory — Signal Feed
   YouTube RSS feed viewer
   ================================================================ */

.signal-filter-card {
  padding: 14px;
}

.signal-filter-shell {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.signal-filter-toggle {
  width: 100%;
  border: 1px solid var(--hair2);
  border-radius: 14px;
  background:
    radial-gradient(80% 120% at 0% 50%, rgba(var(--glow),0.06), transparent 68%),
    rgba(255,255,255,0.018);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 58px;
  padding: 12px 14px;
  text-align: left;
}

.signal-filter-toggle span {
  min-width: 0;
}

.signal-filter-toggle b,
.signal-filter-toggle strong {
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.signal-filter-toggle small {
  color: var(--muted);
  display: block;
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  letter-spacing: 0;
  line-height: 1.5;
  margin-top: 5px;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: none;
  white-space: nowrap;
}

.signal-filter-toggle strong {
  border: 1px solid var(--hair2);
  border-radius: 999px;
  color: var(--bg);
  background: var(--accent);
  flex: 0 0 auto;
  padding: 7px 10px;
}

.signal-filter-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.signal-filter-group {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.signal-filter-group__label {
  color: var(--muted);
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  letter-spacing: 0;
  padding-top: 10px;
  text-transform: none;
}

.signal-filter-group__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── Signal Dismiss Button ──
   44×44 hit area via padding (finding 11 / B1.10) — the button itself fills
   the corner flush (top:0; right:0), while the visible circle stays a small
   24px glyph centred inside it. Since (44-24)/2 = 10, the drawn circle lands
   exactly where the old 24×24 button (top:10;right:10) used to sit. */
.signal-dismiss {
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  z-index: 2;
}
.signal-dismiss__glyph {
  align-items: center;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  display: flex;
  font-size: var(--fs-sm);
  height: 24px;
  justify-content: center;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
  width: 24px;
}
.signal-dismiss:hover .signal-dismiss__glyph {
  background: rgba(255,255,255,0.14);
  color: var(--text);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  /* Phase C rule 4: hero collapses to eyebrow + one 26px line, no copy
     paragraph — the app header already carries "Signal" as the page
     title, so the in-content hero (desktop: eyebrow + two-line title +
     secondary line + copy sentence) is redundant weight at this width. */
  #view-signal .section-heading {
    margin-bottom: var(--sp-4);
  }

  #view-signal .section-heading__title {
    font-size: 26px;
    line-height: 1.2;
    margin-top: 8px;
    max-width: none;
  }

  #view-signal .section-heading__title br,
  #view-signal .section-heading__secondary,
  #view-signal .section-heading__copy {
    display: none;
  }

  .signal-filter-toggle {
    align-items: flex-start;
    flex-direction: column;
  }

  .signal-filter-group {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .signal-filter-group__label {
    padding-top: 0;
  }
}

/* ── E1: custom topic pills ── */
.signal-concept-pill {
  align-items: center;
  display: inline-flex;
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  letter-spacing: 0;
  min-height: 40px;
  padding: 0;
  border: 1px solid var(--hair);
  border-radius: 99px;
  background: none;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.signal-concept-pill--active {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.signal-concept-pill:hover { color: var(--text); border-color: var(--muted); }

/* ── Repaired Signal controls ── */
#view-signal .orion-action,
#view-signal .orion-input,
.signal-tab,
.signal-topic-select,
.signal-topic-remove,
.signal-live-channel,
.signal-channel-filter,
.signal-add summary,
.signal-topic-options summary,
.signal-channel-topic-option {
  font-family: var(--f-body);
  text-transform: none;
}

#view-signal .orion-action,
.signal-tab {
  font-size: var(--fs-sm);
}

#view-signal .orion-input {
  font-size: var(--fs-sm);
  min-height: 44px;
}

#view-signal .orion-chip {
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  letter-spacing: 0;
  text-transform: none;
}

.signal-tab {
  letter-spacing: 0;
}

.signal-topic-select,
.signal-topic-remove {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: var(--fs-sm);
  min-height: 38px;
}

.signal-topic-select {
  padding: 7px 4px 7px 11px;
}

.signal-topic-remove {
  min-width: 34px;
  padding: 7px 10px 7px 4px;
}

.signal-topic-add {
  padding: 7px 11px;
}

.signal-add {
  border-top: 1px solid var(--hair);
  margin-top: 16px;
  padding-top: 10px;
}

.signal-add > summary,
.signal-topic-options > summary {
  align-items: center;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  font-size: var(--fs-sm);
  font-weight: 600;
  justify-content: space-between;
  list-style: none;
  min-height: 44px;
  padding: 8px 10px;
}

.signal-add > summary::-webkit-details-marker,
.signal-topic-options > summary::-webkit-details-marker {
  display: none;
}

.signal-add > summary::after {
  color: var(--faint);
  content: '＋';
}

.signal-add[open] > summary::after {
  content: '−';
}

.signal-add__body {
  display: grid;
  gap: 10px;
  padding: 6px 4px 4px;
}

.signal-add__body > p,
.signal-add__hint,
.signal-add__status,
.signal-empty-copy,
.signal-empty-state {
  font-family: var(--f-body);
}

.signal-add__body > p {
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.5;
  margin: 0;
}

.signal-add__hint,
.signal-add__status,
.signal-empty-copy {
  color: var(--faint);
  font-size: var(--fs-sm);
  line-height: 1.4;
}

.signal-empty-copy {
  padding: 12px 0;
  text-align: center;
}

.signal-topic-options {
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 0;
}

.signal-channel-filter {
  background: none;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  min-height: 40px;
  min-width: 0;
  padding: 0;
  text-align: left;
}

.signal-channel-topics {
  color: var(--faint);
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  line-height: 1.35;
  margin-top: 2px;
}

.signal-channel-action {
  border-radius: 999px;
  flex-shrink: 0;
  padding: 7px 9px;
}

.signal-icon-action {
  align-items: center;
  display: inline-flex;
  flex-shrink: 0;
  justify-content: center;
  min-width: 44px;
  padding: 7px 9px;
}

/* Layout (display/min-height/44px hit area) comes from .check-row
   (design-system.css, finding 11 / B1.10) — this rule only tightens the
   gap for Signal's chip-cloud presentation. */
.signal-channel-topic-option {
  gap: 5px;
}

.signal-live-channel {
  border: 1px solid var(--hair);
  border-radius: 10px;
  cursor: pointer;
  font-size: var(--fs-sm);
  min-height: 44px;
  overflow: hidden;
  padding: 8px 12px;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  width: 100%;
}

.signal-eyebrow {
  color: var(--faint);
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.signal-following {
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--f-body);
  font-size: var(--fs-sm);
  padding: 2px 6px;
}

.signal-active-filter {
  color: var(--muted);
  font-family: var(--f-body);
  font-size: var(--fs-sm);
}

.signal-active-filter strong {
  color: var(--text);
}

.signal-active-filter .orion-action {
  margin-left: 4px;
  padding: 6px 9px;
}

/* "My Channels" side panel — sticky with its own scroller on the desktop
   two-column split. Below 900px .orion-split (design-system.css) drops to
   one column, so this becomes a normal stacked block; without this reset
   it kept position:sticky + overflow-y:auto + a viewport-relative
   max-height, opening a second, nested scroll container underneath
   .main-content's — the exact thing Phase C rule 2 forbids. */
.signal-channels-panel {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

@media (max-width: 900px) {
  .signal-channels-panel {
    position: static;
    max-height: none;
    overflow-y: visible;
  }
}

@media (max-width: 640px) {
  #view-signal .orion-action,
  #view-signal .orion-input,
  .signal-tab,
  .signal-concept-pill,
  .signal-topic-select,
  .signal-topic-remove,
  .signal-live-channel,
  .signal-channel-filter {
    min-height: 44px;
  }

  .signal-topic-remove {
    min-width: 44px;
  }
}