/* ============================================================
   DEBUG.CSS — FlowField debug panel
   Toggle with backtick (`)
   ============================================================ */

.ff-debug {
  position: fixed;
  top: 4rem;
  right: 1.25rem;
  z-index: 9999;

  display: flex;
  flex-direction: column;
  gap: 0.45rem;

  min-width: 270px;
  padding: 0.85rem 1rem 0.9rem;

  background: rgba(0, 0, 0, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);

  font-family: ui-monospace, 'Cascadia Code', monospace;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.8);
  user-select: none;
}

/* ── header ── */

.ff-debug__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.3rem;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.45;
}

.ff-debug__header-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.ff-debug__close {
  all: unset;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  opacity: 0.4;
  transition: opacity 120ms;
  padding: 0 2px;
}

.ff-debug__close:hover {
  opacity: 1;
}

.ff-debug__header kbd {
  font-family: inherit;
  font-size: 0.65rem;
  padding: 1px 5px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-bottom-width: 2px;
  border-radius: 3px;
  opacity: 0.8;
}

/* ── rows ── */

.ff-debug__row {
  display: grid;
  grid-template-columns: 6rem 1fr 3rem;
  align-items: center;
  gap: 0.5rem;
  cursor: default;
}

.ff-debug__label {
  opacity: 0.6;
  white-space: nowrap;
}

.ff-debug__value {
  text-align: right;
  opacity: 0.9;
  font-variant-numeric: tabular-nums;
}

/* ── range slider ── */

.ff-debug__slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

.ff-debug__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  transition: background 120ms;
}

.ff-debug__slider:hover::-webkit-slider-thumb {
  background: #ffffff;
}

.ff-debug__slider::-moz-range-thumb {
  width: 9px;
  height: 9px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
}

/* ── section label ── */

.ff-debug__section-label {
  margin-top: 0.35rem;
  padding-bottom: 0.15rem;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.35;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* ── divider ── */

.ff-debug__divider {
  height: 1px;
  margin: 0.2rem 0;
  background: rgba(255, 255, 255, 0.08);
}

/* ── checkbox row ── */

.ff-debug__row--check {
  grid-template-columns: 6rem auto 1fr;
  cursor: pointer;
}

.ff-debug__check {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: #00d7b0;
  border-radius: 2px;
}

.ff-debug__value--check {
  /* placeholder — keeps grid alignment */
}

/* ── reset button ── */

.ff-debug__reset {
  all: unset;
  margin-top: 0.35rem;
  padding: 0.3rem 0;
  text-align: center;
  font-family: inherit;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 150ms, border-color 150ms;
}

.ff-debug__reset:hover {
  opacity: 0.9;
  border-color: rgba(255, 255, 255, 0.4);
}

/* ── persistent toggle button ── */

.ff-debug-toggle {
  all: unset;
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 9999;

  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 0.85rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.5);
  color: rgba(255, 255, 255, 0.35);
  cursor: pointer;

  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: color 150ms, border-color 150ms, background 150ms;
}

.ff-debug-toggle:hover {
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(0, 0, 0, 0.7);
}

/* ── fps counter ── */

.ff-fps {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: 9999;

  font-family: 'Courier New', monospace;
  font-size: 0.7rem;
  color: rgba(40, 30, 30, 0.4);
  pointer-events: none;
  user-select: none;
}