/* ==========================================================================
   Root Harmonic Studio — 8 Canonical Proportion Systems Meter & Role Shifter
   Standards: Strict Cascade Specificity | Zero Margin for Component Spacing
   ========================================================================== */

.ratio-meter-section {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ratio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.ratio-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ratio-title-wrap .material-symbols-outlined {
  font-size: 20px;
  color: var(--accent-emerald-text);
}

.ratio-title-group {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.ratio-title {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-main);
}

.ratio-hint {
  font-size: 0.66rem;
  color: var(--text-dim);
}

.ratio-controls-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.ratio-action-btn {
  background-color: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  user-select: none;
  box-shadow: var(--shadow-sm);
}

.ratio-action-btn .material-symbols-outlined {
  font-size: 15px;
  color: var(--accent-emerald-text);
}

.ratio-action-btn:hover {
  background-color: var(--surface-subtle-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* 8 Canonical Proportion Selector Strip */
.proportion-pills {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  background-color: var(--pill-track-bg);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}

.prop-pill {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.prop-pill:hover:not(.active) {
  color: var(--text-main);
  background-color: var(--surface-subtle-hover);
}

.prop-pill.active {
  background-color: #10B981;
  color: #FFFFFF;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

/* Live Ratio Industry Use-Case Banner */
.ratio-usecase-banner {
  background-color: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-sm);
  padding: 7px 11px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.ratio-usecase-badge {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald-text);
  border: 1px solid rgba(16, 185, 129, 0.35);
  font-size: 0.64rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.ratio-usecase-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.ratio-bar {
  display: flex;
  height: 32px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--swatch-border);
}

.ratio-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: filter 0.18s ease, width 0.25s ease;
  user-select: none;
  padding: 0 6px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ratio-segment[hidden] {
  display: none;
}

.ratio-segment:hover {
  filter: brightness(1.08);
  z-index: 2;
}

.ratio-segment .segment-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.segment-canvas {
  background-color: var(--preview-bg);
  color: var(--preview-text);
}

.segment-structure {
  background-color: var(--preview-surface);
  color: var(--preview-text);
  border-left: 1px solid var(--preview-border);
  border-right: 1px solid var(--preview-border);
}

.segment-accent {
  background-color: var(--preview-accent);
  color: #0E1116;
  border-right: 1px solid var(--preview-border);
}

.segment-root {
  background-color: var(--preview-primary);
  color: #0E1116;
}

.ratio-legend {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.ratio-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.ratio-legend-item[hidden] {
  display: none;
}

.ratio-legend-item:hover {
  background-color: var(--surface-subtle-hover);
  color: var(--text-main);
}

.ratio-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid var(--swatch-border);
}

.dot-canvas { background-color: var(--preview-bg); }
.dot-structure { background-color: var(--preview-surface); }
.dot-accent { background-color: var(--preview-accent); }
.dot-root { background-color: var(--preview-primary); }