/* ============================================================
   Learn Mode Builder — scoped styles
   Only rules actually referenced by learn_builder.html or
   dynamically injected by builder.js are kept here.
   ============================================================ */

/* ── CSS Variables ── */
:root {
  --builder-bg:          #f8f9fc;
  --builder-surface:     #ffffff;
  --builder-surface-2:   #f1f3f9;
  --builder-surface-3:   #e8ecf4;
  --builder-border:      rgba(0,0,0,0.08);
  --builder-border-2:    rgba(0,0,0,0.14);
  --builder-text:        #0f172a;
  --builder-text-muted:  #64748b;
  --builder-text-dim:    #94a3b8;
  --builder-accent:      #6366f1;
  --builder-accent-glow: rgba(99,102,241,0.2);
  --builder-accent-2:    #8b5cf6;
  --builder-green:       #16a34a;
  --builder-orange:      #d97706;
  --builder-red:         #dc2626;
  --builder-blue:        #2563eb;
  --builder-cyan:        #0891b2;
  --builder-radius:      10px;
  --builder-radius-sm:   6px;
  --builder-shadow:      0 2px 12px rgba(0,0,0,0.10);
  --builder-shadow-lg:   0 8px 32px rgba(0,0,0,0.14);
  --transition:          0.18s cubic-bezier(0.4,0,0.2,1);
}

/* ════════════════════════════════════════════════════════════
   BUTTONS (.bldr-btn / .bldr-btn-primary)
   Used by: stage action buttons in right panel header
   ════════════════════════════════════════════════════════════ */
.bldr-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--builder-radius-sm);
  font-size: var(--fs-xs);
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid var(--builder-border-2);
  background: var(--builder-surface-3);
  color: var(--builder-text);
  transition: all var(--transition);
  white-space: nowrap;
  flex: 1;
  justify-content: center;
}

.bldr-btn:hover {
  background: var(--builder-surface-2);
  border-color: rgba(99,102,241,0.3);
}

.bldr-btn-primary {
  background: linear-gradient(135deg, var(--builder-accent), var(--builder-accent-2));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 0 1px rgba(99,102,241,0.3), 0 2px 8px rgba(99,102,241,0.25);
  flex: 1.2;
}

.bldr-btn-primary:hover {
  background: linear-gradient(135deg, #4f52e8, #7c3aed);
  box-shadow: 0 0 0 1px rgba(99,102,241,0.5), 0 4px 16px rgba(99,102,241,0.35);
  transform: translateY(-1px);
}

.bldr-btn-primary:active { transform: translateY(0); }

/* ════════════════════════════════════════════════════════════
   RIGHT PANEL — STICKY HEADER (preset selector + collapse btn)
   Mirrors practice right-panel layout from right-panel.css
   ════════════════════════════════════════════════════════════ */
.bldr-sticky-header {
  display: flex;
  align-items: center;
  gap: 8px;
  /* negative margin to counter .panel's padding so it sits flush at the top */
  margin: -1rem -1rem 0;
  padding: 10px 12px 10px;
  border-bottom: 1px solid var(--p-border, #e2e8f0);
  background: var(--p-surface, #fff);
  flex-shrink: 0;
  position: relative;
}

/* The custom dropdown wrapper fills remaining space */
.bldr-sticky-header .bldr-pcs {
  flex: 1 1 0;
  min-width: 0;
}

/* ── Custom dropdown (bldr-pcs) — same visual as .preset-custom-select ── */
.bldr-pcs-native { display: none; }   /* hidden; builder.js uses it as data store */

.bldr-pcs {
  position: relative;
}

.bldr-pcs-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 9px 12px;
  background: var(--p-surface, #fff);
  border: 1.5px solid var(--p-border, #e2e8f0);
  border-radius: 10px;
  color: var(--p-text, #1e293b);
  font-family: inherit;
  font-size: var(--fs-md);
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, box-shadow 0.15s;
  gap: 8px;
}

.bldr-pcs-trigger:hover {
  border-color: var(--p-primary, #3b82f6);
}

.bldr-pcs-trigger:focus-visible {
  outline: 2px solid var(--p-primary, #3b82f6);
  outline-offset: 2px;
}

.bldr-pcs-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bldr-pcs-chevron {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--p-muted, #64748b);
  transition: transform 0.2s;
}

.bldr-pcs.open .bldr-pcs-chevron {
  transform: rotate(180deg);
}

.bldr-pcs-list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1.5px solid var(--p-border, #e2e8f0);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(15,23,42,0.12);
  z-index: 200;
  max-height: 280px;
  overflow-y: auto;
  padding: 4px;
}

.bldr-pcs.open .bldr-pcs-list {
  display: block;
}

.bldr-pcs-item {
  padding: 9px 12px;
  border-radius: 7px;
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--p-text, #1e293b);
  cursor: pointer;
  transition: background 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bldr-pcs-item:hover {
  background: var(--p-surface-2, #f8fafc);
}

.bldr-pcs-item.selected {
  color: var(--p-primary, #3b82f6);
  font-weight: 700;
  background: rgba(59,130,246,0.06);
}

/* ── Stage inline row (inside Stage Details tab) ── */
.bldr-stage-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 4px;
}

/* The stage dropdown fills remaining space */
.bldr-stage-inline .bldr-pcs--stage {
  flex: 1 1 0;
  min-width: 0;
}

.bldr-stage-inline .bldr-pcs-trigger {
  font-size: var(--fs-base);
  font-weight: 500;
  padding: 7px 10px;
  border-radius: 8px;
}

.bldr-stage-btns {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

/* ── Tab bar — same visual as #prp-header-tabs in right-panel.css ── */
.bldr-header-tabs {
  display: flex;
  align-items: stretch;
  width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
  gap: 0;
  border-bottom: 1px solid var(--p-border-soft, #e2e8f0);
  background: var(--p-surface, #fff);
  flex-shrink: 0;
  margin: 0 -1rem;
  width: calc(100% + 2rem);
}

.bldr-header-tabs::-webkit-scrollbar { display: none; }

.bldr-tab {
  flex: 1 1 0;
  min-width: 0;
  padding: 10px 6px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--p-muted, #64748b);
  font-family: inherit;
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
  position: relative;
}

/* Vertical separator between every pair of tabs */
.bldr-tab + .bldr-tab::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--p-border-soft, #e2e8f0);
}

/* Hide the separator when either the tab itself or its predecessor is active */
.bldr-tab.active::before,
.bldr-tab.active + .bldr-tab::before {
  display: none;
}

.bldr-tab:hover {
  color: var(--p-text, #1e293b);
}

.bldr-tab.active {
  color: var(--p-primary, #3b82f6);
  border-bottom-color: var(--p-primary, #3b82f6);
}

/* ── Bottom action bar ── */
.bldr-panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: auto -1rem -1rem;
  padding: 10px 12px;
  border-top: 1px solid var(--p-border, #e2e8f0);
  background: var(--p-surface, #fff);
  flex-shrink: 0;
}

/* Ghost "Save Stage" button */
.bldr-save-btn {
  padding: 10px 14px;
  font-size: var(--fs-base);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Big "Simulate" button */
.bldr-simulate-btn {
  flex: 1;
  padding: 12px;
  font-size: var(--fs-md);
  font-weight: 700;
  border-radius: 12px;
}

/* ── Simulation output inside Simulate tab ── */
.bldr-simulate-body {
  display: flex;
  flex-direction: column;
}

.bldr-sim-output {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0;
}

.bldr-sim-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 100%;
  min-height: 180px;
  color: var(--p-text-muted, #94a3b8);
  text-align: center;
  padding: 2rem 1rem;
}

.bldr-sim-placeholder svg {
  opacity: 0.4;
}

.bldr-sim-placeholder p {
  font-size: var(--fs-sm);
  line-height: 1.5;
  margin: 0;
}


/* ════════════════════════════════════════════════════════════
   STAGE STRIP (bottom of canvas)
   ════════════════════════════════════════════════════════════ */
.bldr-stage-strip {
  height: 88px;
  flex-shrink: 0;
  background: var(--builder-surface);
  border-top: 1px solid var(--builder-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 10px;
  overflow-x: auto;
}

.bldr-stage-strip::-webkit-scrollbar { height: 3px; }

/* Stage cards — dynamically injected by builder.js */
.bldr-stage-card {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 10px 18px;
  min-width: 140px;
  max-width: 190px;
  background: var(--builder-surface-2);
  border: 1px solid var(--builder-border);
  border-radius: var(--builder-radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.bldr-stage-card:hover {
  border-color: rgba(99,102,241,0.35);
  background: var(--builder-surface-3);
}

.bldr-stage-card.active {
  background: rgba(99,102,241,0.08);
  border-color: rgba(99,102,241,0.45);
  box-shadow: 0 0 12px rgba(99,102,241,0.1);
}

.bldr-stage-card.active::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--builder-accent), var(--builder-accent-2));
  border-radius: 99px;
}

.bldr-stage-num {
  font-size: var(--fs-xss);
  font-weight: 800;
  color: var(--builder-text-muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.bldr-stage-card.active .bldr-stage-num { color: var(--builder-accent); }

.bldr-stage-name {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--builder-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bldr-stage-status { display: flex; align-items: center; gap: 4px; }

.bldr-stage-check { width: 15px; height: 15px; color: var(--builder-green); }

.bldr-stage-actions { display: flex; gap: 5px; margin-top: 3px; }

.bldr-stage-action-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--builder-text-muted);
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition);
  padding: 0;
}

.bldr-stage-action-btn svg {
  width: 14px;
  height: 14px;
}

.bldr-stage-action-btn:hover {
  background: rgba(0,0,0,0.06);
  color: var(--builder-text);
}

/* "+ New Stage" add button in the strip */
.bldr-stage-add-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--builder-border-2);
  border-radius: var(--builder-radius-sm);
  background: transparent;
  color: var(--builder-text-muted);
  font-size: var(--fs-lg);
  font-weight: 400;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}

.bldr-stage-add-btn:hover {
  border-color: var(--builder-accent);
  color: var(--builder-accent);
  background: rgba(99,102,241,0.05);
}


/* ════════════════════════════════════════════════════════════
   RIGHT PANEL — flex column layout + tab show/hide
   ════════════════════════════════════════════════════════════ */

#right-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  /* Reduce panel padding so sticky header/tabs bleed edge-to-edge */
  padding: 1rem;
}

/* Override the global --right-panel-w clamp (max 285px) — builder needs more room */
body .layout {
  --right-panel-w: clamp(320px, 26vw, 440px);
}

/* Tab panel sections: hidden by default — !important guards against right-panel.css overrides */
.bldr-right-panel { display: none !important; }

/* Active tab: flex col, fills remaining height, scrollable */
.bldr-right-panel.active {
  display: flex !important;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.bldr-right-panel.active .section-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 0 24px;
}

/* ── Form fields ── */
.bldr-field { margin-bottom: 14px; }

.bldr-field-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--builder-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.bldr-field-req { color: var(--builder-accent); font-size: var(--fs-xs); }

.bldr-input,
.bldr-textarea {
  width: 100%;
  background: var(--builder-surface-3);
  border: 1px solid var(--builder-border);
  border-radius: var(--builder-radius-sm);
  color: var(--builder-text);
  font-size: var(--fs-xs);
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
  resize: none;
}

.bldr-input { height: 34px; padding: 0 10px; }

.bldr-textarea { padding: 8px 10px; min-height: 80px; line-height: 1.5; }

.bldr-input:focus,
.bldr-textarea:focus {
  border-color: rgba(99,102,241,0.55);
  box-shadow: 0 0 0 2px rgba(99,102,241,0.12);
}

.bldr-input::placeholder,
.bldr-textarea::placeholder { color: var(--builder-text-dim); }

/* ── Section headers ── */
.bldr-section { margin-bottom: 20px; }

.bldr-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.bldr-section-title {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--builder-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bldr-section-title::before {
  content: '';
  width: 3px;
  height: 12px;
  background: var(--builder-accent);
  border-radius: 2px;
  display: inline-block;
}

.bldr-add-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 28px;
  padding: 0 10px;
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: var(--builder-radius-sm);
  color: var(--builder-accent);
  font-size: var(--fs-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.bldr-add-btn:hover {
  background: rgba(99,102,241,0.15);
  border-color: rgba(99,102,241,0.45);
}

/* ── Components list (dynamically built by builder.js) ── */
.bldr-components-list { display: flex; flex-direction: column; gap: 6px; }

.bldr-comp-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 10px;
  background: var(--builder-surface-2);
  border: 1px solid var(--builder-border);
  border-radius: var(--builder-radius-sm);
  transition: border-color var(--transition);
}

.bldr-comp-item:hover { border-color: var(--builder-border-2); }

.bldr-comp-icon {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--builder-accent);
  margin-top: 4px;
  flex-shrink: 0;
}

.bldr-comp-body { flex: 1; min-width: 0; }

.bldr-comp-name {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--builder-text);
  margin-bottom: 2px;
}

.bldr-comp-desc { font-size: var(--fs-xs); color: var(--builder-text-muted); line-height: 1.45; }

.bldr-comp-delete {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--builder-text-dim);
  cursor: pointer;
  border-radius: 3px;
  transition: all var(--transition);
  flex-shrink: 0;
  padding: 0;
  font-size: var(--fs-xs);
}

.bldr-comp-delete:hover { background: rgba(239,68,68,0.15); color: var(--builder-red); }

/* ── Design decision cards (dynamically built by builder.js) ── */
.bldr-decisions { display: flex; flex-direction: column; gap: 8px; }

.bldr-decision-card {
  background: var(--builder-surface-2);
  border: 1px solid var(--builder-border);
  border-left: 3px solid var(--builder-accent);
  border-radius: var(--builder-radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}

.bldr-decision-card.type-added   { border-left-color: var(--builder-green); }
.bldr-decision-card.type-missing { border-left-color: var(--builder-orange); }
.bldr-decision-card.type-risk    { border-left-color: var(--builder-red); }
.bldr-decision-card.type-scale   { border-left-color: var(--builder-blue); }
.bldr-decision-card.type-perf    { border-left-color: var(--builder-cyan); }
.bldr-decision-card.type-rely    { border-left-color: var(--builder-green); }
.bldr-decision-card.type-fault   { border-left-color: var(--builder-orange); }

.bldr-decision-header {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  gap: 6px;
}

.bldr-decision-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.bldr-decision-card.type-added   .bldr-decision-dot { background: var(--builder-green); }
.bldr-decision-card.type-missing .bldr-decision-dot { background: var(--builder-orange); }
.bldr-decision-card.type-risk    .bldr-decision-dot { background: var(--builder-red); }
.bldr-decision-card.type-scale   .bldr-decision-dot { background: var(--builder-blue); }
.bldr-decision-card.type-perf    .bldr-decision-dot { background: var(--builder-cyan); }
.bldr-decision-card.type-rely    .bldr-decision-dot { background: var(--builder-green); }
.bldr-decision-card.type-fault   .bldr-decision-dot { background: var(--builder-orange); }

.bldr-decision-type-label {
  font-size: var(--fs-xss);
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.bldr-decision-card.type-added   .bldr-decision-type-label { color: var(--builder-green); }
.bldr-decision-card.type-missing .bldr-decision-type-label { color: var(--builder-orange); }
.bldr-decision-card.type-risk    .bldr-decision-type-label { color: var(--builder-red); }
.bldr-decision-card.type-scale   .bldr-decision-type-label { color: var(--builder-blue); }
.bldr-decision-card.type-perf    .bldr-decision-type-label { color: var(--builder-cyan); }
.bldr-decision-card.type-rely    .bldr-decision-type-label { color: var(--builder-green); }
.bldr-decision-card.type-fault   .bldr-decision-type-label { color: var(--builder-orange); }

.bldr-decision-textarea {
  width: 100%;
  padding: 6px 10px 8px;
  background: transparent;
  border: none;
  border-top: 1px solid var(--builder-border);
  color: var(--builder-text-muted);
  font-size: var(--fs-xs);
  font-family: inherit;
  line-height: 1.55;
  resize: none;
  min-height: 56px;
  outline: none;
  transition: color var(--transition);
}

.bldr-decision-textarea:focus { color: var(--builder-text); }
.bldr-decision-textarea::placeholder { color: var(--builder-text-dim); font-style: italic; }

/* ── Notes textarea ── */
.bldr-notes-textarea {
  width: 100%;
  min-height: 300px;
  background: var(--builder-surface-2);
  border: 1px solid var(--builder-border);
  border-radius: var(--builder-radius-sm);
  color: var(--builder-text);
  font-size: var(--fs-xs);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  padding: 12px;
  outline: none;
  resize: vertical;
  line-height: 1.6;
  transition: border-color var(--transition);
}

.bldr-notes-textarea:focus { border-color: rgba(99,102,241,0.5); }
.bldr-notes-textarea::placeholder { color: var(--builder-text-dim); font-style: italic; }

/* ── Tags ── */
.bldr-tags-input {
  width: 100%;
  height: 34px;
  padding: 0 10px;
  background: var(--builder-surface-3);
  border: 1px solid var(--builder-border);
  border-radius: var(--builder-radius-sm);
  color: var(--builder-text);
  font-size: var(--fs-xs);
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.bldr-tags-input:focus { border-color: rgba(99,102,241,0.5); }
.bldr-tags-input::placeholder { color: var(--builder-text-dim); }

/* ── Divider ── */
.bldr-divider {
  height: 1px;
  background: var(--builder-border);
  margin: 12px 0;
}

/* ── Autosave indicator ── */
.bldr-autosave {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--fs-xs);
  color: var(--builder-text-dim);
  padding: 8px 0 0;
}

.bldr-autosave-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--builder-text-dim);
  transition: background var(--transition);
}

.bldr-autosave.saved  .bldr-autosave-dot { background: var(--builder-green); }
.bldr-autosave.saving .bldr-autosave-dot {
  background: var(--builder-orange);
  animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ════════════════════════════════════════════════════════════
   EMPTY STATES
   ════════════════════════════════════════════════════════════ */
.bldr-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 32px 24px;
  text-align: center;
}

.bldr-empty-title { font-size: var(--fs-xs); font-weight: 600; color: var(--builder-text-muted); }
.bldr-empty-sub { font-size: var(--fs-xss); color: var(--builder-text-dim); line-height: 1.5; max-width: 200px; }

/* ════════════════════════════════════════════════════════════
   TOAST NOTIFICATIONS (dynamically injected by builder.js)
   ════════════════════════════════════════════════════════════ */
.bldr-toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.bldr-toast {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #ffffff;
  border: 1px solid var(--builder-border-2);
  border-radius: var(--builder-radius);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--builder-text);
  box-shadow: var(--builder-shadow-lg);
  animation: toast-in 0.25s cubic-bezier(0.4,0,0.2,1);
  pointer-events: auto;
  max-width: 340px;
}

.bldr-toast.success { border-color: rgba(34,197,94,0.3); }
.bldr-toast.error   { border-color: rgba(239,68,68,0.3); }
.bldr-toast.info    { border-color: rgba(99,102,241,0.3); }
.bldr-toast-icon    { font-size: var(--fs-sm); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════════════════════
   LOADING OVERLAY (dynamically injected by builder.js)
   ════════════════════════════════════════════════════════════ */
.bldr-loading {
  position: absolute;
  inset: 0;
  background: rgba(248,249,252,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  backdrop-filter: blur(4px);
}

.bldr-loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(99,102,241,0.2);
  border-top-color: var(--builder-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ════════════════════════════════════════════════════════════
   MODAL (dynamically injected by builder.js)
   ════════════════════════════════════════════════════════════ */
.bldr-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.4);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  animation: fadein 0.2s ease;
}

.bldr-modal {
  background: var(--builder-surface-2);
  border: 1px solid var(--builder-border-2);
  border-radius: var(--builder-radius);
  padding: 24px;
  width: 380px;
  max-width: 90vw;
  box-shadow: var(--builder-shadow-lg);
  animation: slidein 0.2s cubic-bezier(0.4,0,0.2,1);
}

.bldr-modal-title { font-size: var(--fs-base); font-weight: 700; color: var(--builder-text); margin-bottom: 8px; }
.bldr-modal-sub   { font-size: var(--fs-xs); color: var(--builder-text-muted); line-height: 1.5; margin-bottom: 20px; }
.bldr-modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
@keyframes slidein {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ════════════════════════════════════════════════════════════
   BUILDER MODE — LAYOUT FIXES (index.html SPA)
   ════════════════════════════════════════════════════════════ */

/* 1. Canvas wrapper: flex column so #canvas takes remaining space
      and #bldr-stage-strip sits pinned at the bottom */
body.builder-mode .canvas-wrapper {
  display: flex;
  flex-direction: column;
}

body.builder-mode #canvas {
  flex: 1;
  min-height: 0;
  height: auto; /* override any fixed height */
}

/* 2. Right panel: #builder-right-view must be a flex column that fills
      the full panel height so .bldr-panel-actions is pushed to the bottom */
#builder-right-view {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

/* When hidden, override display:flex back to none */
#builder-right-view.hidden {
  display: none !important;
}

/* Bottom action bar: no longer relies on margin:auto — pinned naturally
   as the last non-flex-1 child of the flex column */
.bldr-panel-actions {
  margin-top: auto; /* push to bottom if panel has leftover space */
}