.signal-mode-panel { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 20px; margin: 14px 20px 12px; padding: 12px 14px; border: 1px solid #2a313a; border-radius: 8px; background: #15191e; font-family: Arial, sans-serif; }
.signal-mode-main { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; min-width: 0; }
.signal-mode-label { color: #9ba6b4; font-size: 10px; font-weight: 600; line-height: 1.5; letter-spacing: .055em; }
.signal-mode-control { display: flex; flex-wrap: wrap; align-items: stretch; gap: 3px; max-width: 100%; padding: 3px; border: 1px solid #343d47; border-radius: 7px; background: #101317; }
.signal-mode-control button { flex: 1 1 auto; min-width: 0; min-height: 38px; padding: 8px 12px; border: 1px solid transparent; border-radius: 5px; background: transparent; color: #aab5c2; font: 600 12px/1.4 Arial, sans-serif; overflow-wrap: anywhere; cursor: pointer; transition: color .12s ease, background .12s ease, border-color .12s ease; }
.signal-mode-control button:hover { color: #e5efed; background: #212a2e; }
.signal-mode-control button[aria-pressed="true"] { color: #c2efdf; border-color: #39695a; background: #203b33; }
.signal-mode-control button:focus-visible { outline: 2px solid #a5e8cf; outline-offset: 3px; }
.signal-mode-panel .signal-mode-hint { grid-column: 1; min-width: 0; margin: 0; color: #9da9b8; font: 11px/1.55 Arial, sans-serif; overflow-wrap: anywhere; }
.signal-mode-panel .signal-mode-context { grid-column: 2; grid-row: 1 / 3; align-self: center; max-width: 290px; min-width: 0; margin: 0; color: #bdc9d5; font: 11px/1.55 Arial, sans-serif; overflow-wrap: anywhere; }
.signal-details .signal-mode-detail { display: block; margin-top: 4px; color: #a5b5bf; font: 10px/1.45 Arial, sans-serif; overflow-wrap: anywhere; }
@media (max-width: 800px) {
  .signal-mode-panel { grid-template-columns: minmax(0, 1fr); gap: 8px; margin-inline: 14px; padding: 12px; }
  .signal-mode-panel .signal-mode-context { grid-column: 1; grid-row: auto; max-width: none; }
}
@media (max-width: 480px) {
  .signal-mode-main { display: block; }
  .signal-mode-label { display: block; margin-bottom: 7px; }
  .signal-mode-control { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .signal-mode-control button { min-height: 44px; padding: 8px 6px; font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) { .signal-mode-control button { transition: none; } }