/* ---------- Mode Settings (top-level, right after mode tabs) ---------- */
.mode-settings-wrap {
  margin: 32px auto;
  max-width: 1100px;
  padding: 0 24px;
}
.mode-settings-wrap .settings-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 26px;
  margin-top: 18px;
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
}
.mode-settings-wrap .settings-section:first-child {
  margin-top: 0;
}
.mode-settings-wrap .settings-section-title {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 700;
}

/* ---------- Live Preview Section ---------- */
#preview-section .step-num {
  font-size: 22px;
  color: #fff;
}
.preview-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  margin-top: 16px;
}
@media (max-width: 900px) {
  .preview-grid { grid-template-columns: 1fr; }
}
.preview-stage {
  background: #0c0c10;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--line);
}
.preview-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview-canvas-wrap img,
.preview-canvas-wrap video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}
.preview-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 24px;
}
.preview-empty-icon {
  font-size: 48px;
  opacity: 0.4;
}
.preview-empty-text {
  color: var(--muted);
  font-size: 14px;
  max-width: 320px;
}
.preview-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(2px);
}
.preview-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  gap: 12px;
  flex-wrap: wrap;
}
.preview-scene-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.preview-scene-tab {
  padding: 6px 14px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  transition: all .15s;
}
.preview-scene-tab:hover {
  border-color: var(--accent);
}
.preview-scene-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.preview-mode-btns {
  display: flex;
  gap: 6px;
}
.preview-info {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.preview-info-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.preview-info-val {
  font-weight: 600;
  font-size: 14px;
  word-break: break-all;
}
.preview-info-tip {
  margin-top: 6px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.preview-info-tip ul {
  margin: 4px 0 0 16px;
  padding: 0;
}
.preview-info-tip li {
  margin-bottom: 4px;
  line-height: 1.4;
}
.bg-grid .bg-card.preview-active {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
  transform: scale(0.97);
}