/* ========================================
   STROKE TEXT MODULE
   ======================================== */

/* --- Canvas layer stack --- */
.st-canvas-stack {
  position: relative;
  display: inline-block;
  line-height: 0;
}

.st-canvas-stack canvas {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 48px - 48px);
  border-radius: 12px;
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
}

.st-canvas-stack .st-base-canvas {
  position: relative;
  z-index: 1;
}

.st-canvas-stack .st-text-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.st-canvas-stack .st-overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: auto;
  cursor: crosshair;
}

/* --- Tab bar --- */
.st-tab-bar {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 8px;
}

.st-tab-btn {
  flex: 1;
  padding: 7px 4px;
  font-size: 0.65rem;
  font-weight: 600;
  text-align: center;
  background: transparent;
  color: var(--muted);
  border: none;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.st-tab-btn:not(:last-child) {
  border-right: 1px solid var(--line);
}

.st-tab-btn:hover {
  background: rgba(171, 255, 203, 0.06);
  color: var(--text);
}

.st-tab-btn.active {
  background: rgba(171, 255, 203, 0.12);
  color: var(--accent);
}

/* --- Tab panels --- */
.st-tab-panel {
  display: none;
}

.st-tab-panel.active {
  display: block;
}

/* --- Segmented control (fill type, stroke pos, line join) --- */
.st-segment-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.st-fill-type-btn,
.st-stroke-pos-btn,
.st-join-btn {
  flex: 1;
  padding: 5px 6px;
  font-size: 0.65rem;
  font-weight: 600;
  text-align: center;
  background: transparent;
  color: var(--muted);
  border: none;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  white-space: nowrap;
}

.st-fill-type-btn:not(:last-child),
.st-stroke-pos-btn:not(:last-child),
.st-join-btn:not(:last-child) {
  border-right: 1px solid var(--line);
}

.st-fill-type-btn:hover,
.st-stroke-pos-btn:hover,
.st-join-btn:hover {
  background: rgba(171, 255, 203, 0.06);
  color: var(--text);
}

.st-fill-type-btn.active,
.st-stroke-pos-btn.active,
.st-join-btn.active {
  background: rgba(171, 255, 203, 0.12);
  color: var(--accent);
}

/* --- Alignment radio group --- */
.st-align-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.st-align-btn {
  flex: 1;
  padding: 5px 6px;
  font-size: 0.65rem;
  font-weight: 600;
  text-align: center;
  background: transparent;
  color: var(--muted);
  border: none;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.st-align-btn:not(:last-child) {
  border-right: 1px solid var(--line);
}

.st-align-btn:hover {
  background: rgba(171, 255, 203, 0.06);
}

.st-align-btn.active {
  background: rgba(171, 255, 203, 0.12);
  color: var(--accent);
}

/* --- Preset cards row --- */
.st-presets-row {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 4px 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(171, 255, 203, 0.2) transparent;
}

.st-presets-row::-webkit-scrollbar {
  height: 4px;
}

.st-presets-row::-webkit-scrollbar-thumb {
  background: rgba(171, 255, 203, 0.2);
  border-radius: 2px;
}

.st-preset-card {
  flex-shrink: 0;
  width: 80px;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color 120ms ease, transform 120ms ease;
  background: rgba(255, 255, 255, 0.02);
}

.st-preset-card:hover {
  border-color: rgba(171, 255, 203, 0.4);
  transform: translateY(-1px);
}

.st-preset-card:active {
  transform: translateY(0);
}

.st-preset-thumb {
  width: 80px;
  height: 40px;
  line-height: 0;
}

.st-preset-thumb canvas {
  width: 100%;
  height: 100%;
  border-radius: 0;
  box-shadow: none;
}

.st-preset-name {
  font-size: 0.55rem;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
  padding: 3px 2px 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.02em;
}

/* --- Subsection styling --- */
.st-subsection {
  padding-left: 10px;
  border-left: 2px solid var(--line);
  margin-left: 2px;
  margin-bottom: 2px;
}

/* --- Conditional sections --- */
.st-solid-only,
.st-grad-only {
  transition: opacity 120ms ease;
}

/* --- Double stroke sub-panel --- */
.st-double-stroke-sub {
  padding-left: 10px;
  border-left: 2px solid var(--line);
  margin-left: 2px;
}

/* --- Glow layers indicator --- */
.st-layers-dots {
  display: flex;
  gap: 3px;
  margin-left: 6px;
}

.st-layers-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(171, 255, 203, 0.2);
  transition: background 120ms ease;
}

.st-layers-dot.active {
  background: var(--accent);
}