.builder-layout {
  display: grid;
  grid-template-columns: var(--left-panel-width, 400px) 6px 1fr;
  height: 100vh;
  overflow: hidden;
  transition: grid-template-columns 0.22s ease;
}

.builder-layout.panel-collapsed {
  grid-template-columns: 40px 6px 1fr;
}

/* Resize handle between left panel and preview */
.builder-resize-handle {
  background: var(--border);
  cursor: col-resize;
  position: relative;
  transition: background 0.15s;
  z-index: 5;
  flex-shrink: 0;
}
.builder-resize-handle::after {
  content: '';
  position: absolute;
  inset: 0 -4px;
}
.builder-resize-handle:hover,
.builder-resize-handle.is-dragging {
  background: var(--accent);
}
.builder-layout.panel-collapsed .builder-resize-handle {
  cursor: default;
  pointer-events: none;
  background: var(--border);
}

/* LEFT PANEL */
.builder-panel {
  border-right: none;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Strip shown when panel is collapsed */
.panel-expand-strip {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: absolute;
  inset: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 10;
  cursor: pointer;
}

.builder-layout.panel-collapsed .panel-expand-strip {
  display: flex;
}

.panel-expand-strip-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 18px;
  padding: 10px 6px;
  border-radius: var(--radius);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.panel-expand-strip-btn:hover { color: var(--accent); }

/* Collapse button in panel header */
.panel-collapse-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px 6px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1;
  flex-shrink: 0;
  margin-left: auto;
  transition: color 0.15s, background 0.15s;
}
.panel-collapse-btn:hover { color: var(--text-primary); background: var(--background); }

.builder-panel-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 4px;
}

.builder-panel-header .builder-back { width: 100%; }
.builder-panel-header .builder-campaign-name { flex: 1; min-width: 0; }
.builder-panel-header .builder-template-name { width: 100%; }

.builder-back {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 12.5px;
  cursor: pointer;
  margin-bottom: 8px;
  background: none;
  border: none;
  padding: 0;
}
.builder-back:hover { color: var(--accent); }

.builder-campaign-name {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.builder-template-name {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* MODE TOGGLE */
.mode-toggle {
  display: flex;
  gap: 4px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.mode-btn {
  flex: 1;
  padding: 7px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: none;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.mode-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* TABS */
.builder-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.builder-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  transition: all 0.15s;
}

.builder-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* PANEL CONTENT */
.panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.panel-content--html {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* FIELD GROUPS */
.field-group { margin-bottom: 16px; }

.field-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-secondary);
  margin-bottom: 10px;
  cursor: pointer;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.field-group-header:hover { color: var(--text-primary); }
.field-group-content { padding-top: 4px; }
.field-group-content.collapsed { display: none; }

.field-row { margin-bottom: 12px; }

.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.field-optional {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-tertiary);
  background: var(--background);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 3px;
}

.field-row input,
.field-row textarea,
.field-row select {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--surface);
  outline: none;
  transition: border-color 0.15s;
}

.field-row input:focus,
.field-row textarea:focus,
.field-row select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
}

.field-row textarea { min-height: 70px; resize: vertical; }

/* COLOR FIELD */
.color-field {
  display: flex;
  gap: 6px;
  align-items: center;
}

.color-field input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 2px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  cursor: pointer;
  flex-shrink: 0;
}

.color-field input[type="text"] {
  flex: 1;
  font-family: monospace;
}

/* STYLE TAB */
.style-section {
  margin-bottom: 20px;
}

.style-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-tertiary);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.style-section-hint {
  font-size: 11px;
  color: var(--text-tertiary);
  margin: -4px 0 10px;
  line-height: 1.5;
}

.style-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 10px;
}

.style-row-label {
  font-size: 12.5px;
  color: var(--text-secondary);
  font-weight: 500;
  flex: 1;
}

/* STATUS PANEL */
.delete-campaign-panel {
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.delete-campaign-btn {
  color: var(--text-tertiary);
  font-size: 12px;
  width: 100%;
  justify-content: center;
  transition: all 0.15s;
}
.delete-campaign-btn:hover {
  color: var(--danger);
  background: var(--danger-light);
  border-color: var(--danger);
}

.status-panel {
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  background: var(--background);
  flex-shrink: 0;
}

.status-panel-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.status-panel select { margin-bottom: 8px; }

/* SAVE STATUS */
.save-status {
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
}
.save-status.saved   { color: var(--success); }
.save-status.saving  { color: var(--warning); }
.save-status.unsaved { color: var(--text-secondary); }

/* RIGHT PANEL - PREVIEW */
.preview-panel {
  display: flex;
  flex-direction: column;
  background: #e5e7eb;
  overflow: hidden;
}

.preview-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.preview-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  flex: 1;
}

.preview-refresh-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 5px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}
.preview-refresh-btn:hover { color: var(--accent); background: var(--accent-light); }
.preview-refresh-btn svg { display: block; }
.preview-refresh-btn.spinning svg { animation: spin 0.5s linear; }

.device-btns {
  display: flex;
  gap: 4px;
}

.device-btn {
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: none;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.device-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.export-dropdown {
  position: relative;
}

.export-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  z-index: 100;
  display: none;
}

.export-menu.open { display: block; }

.export-item {
  display: block;
  width: 100%;
  padding: 10px 16px;
  background: none;
  border: none;
  text-align: left;
  font-size: 13.5px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.1s;
}

.export-item:hover { background: var(--background); }
.export-item:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.export-item:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg); }

.export-item-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.export-item--admin {
  color: #D97706;
  font-weight: 500;
}
.export-item--admin:hover { background: #FEF3C7; }

/* DEVICE FRAMES */
.preview-area {
  flex: 1;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px;
}

.preview-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

/* frame-shell: wraps notch + screen + home-bar */
.frame-shell { flex-shrink: 0; }

.frame-shell.desktop .frame-screen {
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  border-radius: 4px;
}

.frame-shell.tablet {
  background: #1c1c1e;
  border-radius: 14px;
  padding: 3px;
}
.frame-shell.tablet .frame-screen { border-radius: 8px; overflow: hidden; }
.frame-shell.tablet .notch,
.frame-shell.tablet .home-bar { display: flex; }

.frame-shell.mobile {
  background: #1c1c1e;
  border-radius: 18px;
  padding: 3px;
}
.frame-shell.mobile .frame-screen { border-radius: 10px; overflow: hidden; }
.frame-shell.mobile .notch,
.frame-shell.mobile .home-bar { display: flex; }

.notch {
  display: none;
  justify-content: center;
  align-items: center;
  padding: 6px 0 3px;
  background: #1c1c1e;
}
.notch-pill {
  width: 40px;
  height: 4px;
  background: #3a3a3c;
  border-radius: 3px;
}

.home-bar {
  display: none;
  justify-content: center;
  align-items: center;
  padding: 5px 0;
  background: #1c1c1e;
}
.home-pill {
  width: 32px;
  height: 3px;
  background: #3a3a3c;
  border-radius: 2px;
}

.frame-screen {
  background: #fff;
  overflow: hidden;
  transition: width 0.2s ease;
  position: relative; /* needed for ei-overlay absolute positioning */
}

#ei-overlay {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  cursor: default;
}

#preview-iframe {
  display: block;
  width: 100%;
  border: 0;
  background: #F3F4F6;
  min-height: 400px;
}

.device-label {
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: .04em;
}

/* CODE PANEL */
.code-panel {
  background: #1a1a2e;
  border-top: 1px solid #333;
  flex-shrink: 0;
  max-height: 300px;
  display: none;
}

.code-panel.open { display: block; }

.code-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.code-panel-header span { color: rgba(255,255,255,0.6); font-size: 12px; }

.code-content {
  font-family: 'Courier New', monospace;
  font-size: 12px;
  color: #e2e8f0;
  padding: 14px 16px;
  overflow: auto;
  max-height: 250px;
  white-space: pre;
}

/* AI PANEL */
.ai-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  min-height: 0;
}

.ai-panel-header {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.ai-panel-title {
  font-size: 13px;
  font-weight: 700;
  flex: 1;
}

.undo-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.undo-btn {
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.undo-btn.active {
  background: var(--primary);
  color: #fff;
}

.ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

.ai-msg {
  max-width: 85%;
  padding: 10px 13px;
  border-radius: var(--radius-lg);
  font-size: 13px;
  line-height: 1.5;
}

.ai-msg.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 3px;
}

.ai-msg.assistant {
  align-self: flex-start;
  background: var(--background);
  border: 1px solid var(--border);
  border-bottom-left-radius: 3px;
}

.ai-update-chip {
  font-size: 11.5px;
  padding: 4px 10px;
  background: var(--success-light);
  color: var(--success);
  border-radius: 999px;
  border: 1px solid rgba(5,150,105,0.2);
  margin-top: 4px;
  align-self: flex-start;
  font-weight: 600;
}

.ai-typing {
  display: flex;
  gap: 4px;
  padding: 10px 13px;
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 3px;
  align-self: flex-start;
  width: fit-content;
}

.ai-typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-tertiary);
  animation: bounce 1.2s infinite;
}
.ai-typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

.ai-input-area {
  padding: 10px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.ai-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: var(--font);
  resize: none;
  min-height: 36px;
  max-height: 100px;
  outline: none;
}

.ai-input:focus { border-color: var(--accent); }

/* ═══════════════════════════════════════════════════════════════
   PERSONALIZATION FEATURE STYLES
   ═══════════════════════════════════════════════════════════════ */

/* ── Settings Tab: Personalization config section ── */
.pers-section {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 16px;
  background: #F0F4FF;
}
.pers-section-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pers-section-hint {
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
}
.pers-dim-row {
  margin-bottom: 10px;
}
.pers-dim-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  user-select: none;
}
.pers-dim-label input[type="checkbox"] {
  width: 15px;
  height: 15px;
  cursor: pointer;
  accent-color: var(--primary);
  flex-shrink: 0;
}
.pers-dim-attr {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  background: var(--bg);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-family: 'Courier New', monospace;
  margin-left: 4px;
}
.pers-level-row {
  display: flex;
  gap: 5px;
  margin-top: 6px;
  margin-left: 23px;
  flex-wrap: wrap;
}
.pers-level-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-secondary);
  user-select: none;
}
.pers-level-chip input[type="checkbox"] {
  width: 12px;
  height: 12px;
  cursor: pointer;
  accent-color: var(--primary);
}

/* National accounts "Manage..." button sits inline with chips */
.pers-manage-accounts-btn {
  font-size: 11px !important;
  padding: 2px 9px !important;
  height: auto !important;
  align-self: center;
  margin-left: 2px;
}

/* ── Settings Tab: Subject/Preview variant inputs ── */
.pers-settings-vars {
  margin-top: 5px;
}
.pers-settings-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}
.pers-settings-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 66px;
  flex-shrink: 0;
}
.pers-settings-input {
  flex: 1;
  font-size: 13px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  border-left: 3px solid var(--primary);
}

/* ── Content Tab: Per-field variant accordion ── */
.pers-accordion {
  margin-top: 5px;
}
.pers-acc-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 0;
}
.pers-acc-toggle:hover {
  text-decoration: underline;
}
.pers-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: white;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  padding: 0 5px;
  min-width: 16px;
  height: 16px;
  line-height: 1;
}
.pers-acc-content {
  margin-top: 6px;
  border-left: 2px solid var(--primary);
  padding-left: 10px;
}
.pers-variant-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
}
.pers-variant-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 72px;
  flex-shrink: 0;
}
.pers-var-input {
  flex: 1;
  font-size: 12px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
}

/* ── Inline Editor Modal: Variant tab strip ── */
.pers-tabs {
  display: flex;
  gap: 0;
  margin: -12px -16px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-wrap: wrap;
  overflow-x: auto;
}
.pers-tab {
  padding: 7px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
}
.pers-tab:hover { color: var(--primary); }
.pers-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.pers-tab-hint {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  margin: -4px 0 6px;
  padding: 0 1px;
}