/* ===== PHYSICS MODULE SPECIFIC STYLES ===== */

/* Projectile canvas trail colors */
.proj-trail-0 { color: #4fc3f7; }
.proj-trail-1 { color: #ff7043; }
.proj-trail-2 { color: #66bb6a; }
.proj-trail-3 { color: #ab47bc; }
.proj-trail-4 { color: #ffd54f; }

/* Trajectory comparison legend */
.traj-legend {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-top: 0.5rem; font-size: 0.75rem;
}
.traj-legend-item {
  display: flex; align-items: center; gap: 0.3rem;
  padding: 2px 8px; border-radius: 4px;
  background: var(--bg-tertiary);
}

/* Zoom controls overlay */
.zoom-controls {
  display: flex; align-items: center; gap: 0.35rem;
  position: absolute; bottom: 10px; right: 10px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 4px 8px; box-shadow: var(--shadow-sm);
  z-index: 5; user-select: none;
}
.zoom-controls .btn-sm { min-width: 30px; padding: 0.25rem 0.5rem; font-size: 1rem; font-weight: 700; line-height: 1; }
.zoom-level { font-size: 0.75rem; color: var(--text-muted); min-width: 38px; text-align: center; font-variant-numeric: tabular-nums; }

/* Wave pattern display */
#wave-canvas { background: var(--canvas-bg); }

/* Pendulum energy display  */
.energy-bar-container h4 {
  font-size: 0.85rem; margin-bottom: 0.4rem;
}

/* ===== NUCLEAR DECAY — Isotope Search ===== */
.nuc-search-wrap {
  position: relative;
  margin-bottom: 0.5rem;
}
.nuc-search-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.nuc-search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.nuc-search-input::placeholder {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.nuc-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  max-height: 260px;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: var(--shadow-xl);
  z-index: 100;
}
.nuc-dd-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  font-size: 0.82rem;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.12s;
}
.nuc-dd-item:last-child { border-bottom: none; }
.nuc-dd-item:hover, .nuc-dd-item.nuc-dd-focused {
  background: var(--accent-subtle);
}
.nuc-dd-empty {
  color: var(--text-muted);
  cursor: default;
  font-style: italic;
}
.nuc-dd-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.nuc-dd-label {
  font-weight: 600;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nuc-dd-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.nuc-selected-display {
  padding: 0.4rem 0.65rem;
  background: var(--bg-tertiary);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}