html, body {
  height: 100%;
}
body.builder-body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ===== Topbar ===== */
.builder-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: rgba(8, 8, 12, 0.75);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--border);
  z-index: 20;
  flex-shrink: 0;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 18px;
}
.back-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color 0.2s var(--ease);
}
.back-link:hover {
  color: var(--text);
}

.mode-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}
.mode-tabs button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all 0.3s var(--ease);
}
.mode-tabs button.active {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 16px -6px rgba(139, 92, 246, 0.7);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.save-indicator {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8rem;
  color: var(--text-faint);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.save-indicator.show {
  opacity: 1;
}
.save-indicator .dot-ok {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pulseGlow 1.6s ease-out 1;
  flex-shrink: 0;
}
.save-indicator.error {
  color: var(--accent-2);
  max-width: 220px;
}
.save-indicator.error .dot-ok {
  background: var(--accent-2);
  animation: none;
}

/* ===== App shell ===== */
.app-shell {
  flex: 1;
  display: grid;
  grid-template-columns: 400px 1fr;
  min-height: 0;
}

/* ---- Editor pane ---- */
.editor-pane {
  overflow-y: auto;
  padding: 24px 22px 80px;
  border-right: 1px solid var(--border);
  background: var(--bg-soft);
}
.editor-section {
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
}
.editor-section > summary {
  list-style: none;
  cursor: pointer;
  padding: 15px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  user-select: none;
}
.editor-section > summary::-webkit-details-marker {
  display: none;
}
.editor-section > summary .chev {
  transition: transform 0.3s var(--ease);
  color: var(--text-faint);
}
.editor-section[open] > summary .chev {
  transform: rotate(180deg);
}
.editor-section-body {
  padding: 4px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}
.field input[type="text"],
.field input[type="url"],
.field input[type="email"],
.field input[type="tel"],
.field textarea,
.field select,
.item-card input[type="text"],
.item-card textarea,
.item-card select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 11px 13px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.5;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease), transform 0.12s var(--ease);
}
.field select,
.item-card select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a99a8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 30px;
}
.field input::placeholder,
.field textarea::placeholder,
.item-card input::placeholder,
.item-card textarea::placeholder {
  color: var(--text-faint);
}
.field input[type="text"]:hover,
.field input[type="url"]:hover,
.field input[type="email"]:hover,
.field input[type="tel"]:hover,
.field textarea:hover,
.field select:hover,
.item-card input:hover,
.item-card textarea:hover,
.item-card select:hover {
  border-color: var(--border-strong);
}
.field textarea,
.item-card textarea {
  resize: none;
  min-height: 64px;
  overflow: hidden;
}
.field input:focus,
.field textarea:focus,
.field select:focus,
.item-card input:focus,
.item-card textarea:focus,
.item-card select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface-strong);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.22);
  transform: translateY(-1px);
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.field-hint {
  font-size: 0.75rem;
  color: var(--text-faint);
  margin: -6px 0 0;
  line-height: 1.5;
}
.item-card .field-hint {
  margin: 8px 0 0;
}
.field-warning {
  color: var(--accent-2) !important;
}
.mono-field {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace !important;
  font-size: 0.8rem !important;
  letter-spacing: -0.01em;
}

/* image upload */
.avatar-upload {
  display: flex;
  align-items: center;
  gap: 14px;
}
.avatar-preview {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border-strong);
}
.avatar-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.upload-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.bg-thumb {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  overflow: hidden;
  flex-shrink: 0;
}
.bg-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* emoji quick picker */
.emoji-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.emoji-picker button {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.emoji-picker button:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.emoji-picker button.selected {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.15);
}

/* theme swatches */
.swatch-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  box-shadow: 0 0 0 1px var(--border);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.swatch:hover {
  transform: scale(1.08);
}
.swatch.selected {
  box-shadow: 0 0 0 2px var(--bg-soft), 0 0 0 4px var(--accent);
}
.color-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.color-row input[type="color"] {
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: none;
  cursor: pointer;
}
.color-row span {
  font-size: 0.8rem;
  color: var(--text-faint);
}

.seg-control {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.seg-control button {
  flex: 1;
  min-width: 80px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.seg-control button.selected {
  border-color: var(--accent);
  color: #fff;
  background: var(--gradient);
}
.seg-control.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* repeatable list items (links / features) */
.item-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.item-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  padding: 12px;
  animation: fadeInUp 0.35s var(--ease) both;
}
.item-card-head {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}
.item-card-head input[type="text"],
.item-card-head select {
  padding: 8px 9px;
  font-size: 0.85rem;
}
.item-card-head input.emoji-input {
  width: 32px;
  flex: none;
  text-align: center;
  flex-shrink: 0;
  padding: 8px 2px;
}
.item-card-head input[type="text"]:not(.emoji-input) {
  flex: 1;
  min-width: 0;
}
.item-card input.mono-field {
  padding: 8px 10px;
}

/* per-item image/emoji thumbnail */
.item-icon-wrap {
  position: relative;
  flex-shrink: 0;
}
.item-icon-upload {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 0.85rem;
  transition: border-color 0.2s var(--ease);
}
.item-icon-upload:hover {
  border-color: var(--accent);
}
.item-icon-upload img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.item-icon-wrap::after {
  content: "📷";
  position: absolute;
  bottom: -5px;
  right: -5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 8px;
  line-height: 15px;
  text-align: center;
  border: 2px solid var(--bg-soft);
  pointer-events: none;
}
.item-icon-remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-2);
  color: #fff;
  border: 2px solid var(--bg-soft);
  font-size: 0.65rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

/* embeds type select */
select.type-select {
  flex-shrink: 0;
  width: 104px;
  padding: 8px 24px 8px 9px;
  font-size: 0.85rem;
  background-position: right 6px center;
  background-size: 14px;
}

.item-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
}
.item-card-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.item-card-actions button {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  transition: all 0.2s var(--ease);
}
.item-card-actions button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--text);
}
.item-card-actions button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.item-card-actions button.danger:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.add-item-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1.5px dashed var(--border-strong);
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.add-item-btn:hover {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(139, 92, 246, 0.08);
}

.danger-zone {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* ---- Preview pane ---- */
.preview-pane {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 36px;
  position: relative;
  overflow: auto;
  background:
    radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.12), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.1), transparent 45%);
}

.device-frame {
  position: relative;
  transition: width 0.4s var(--ease), height 0.4s var(--ease);
}

/* phone frame for bio mode */
.device-frame.phone {
  width: 340px;
  height: 700px;
  border-radius: 42px;
  background: #0c0c14;
  border: 8px solid #1c1b28;
  box-shadow: var(--shadow-glow), var(--shadow-soft);
  padding: 14px;
}
.device-frame.phone::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 22px;
  background: #1c1b28;
  border-radius: 14px;
  z-index: 2;
}
.device-frame.phone iframe {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 30px;
  background: #fff;
}

/* browser frame for website mode */
.device-frame.browser {
  width: 100%;
  max-width: 900px;
  height: 640px;
  border-radius: 16px;
  background: var(--surface-solid);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-glow), var(--shadow-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.browser-frame-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.browser-frame-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}
.browser-frame-url {
  margin-left: 10px;
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.75rem;
  color: var(--text-faint);
}
.device-frame.browser iframe {
  flex: 1;
  width: 100%;
  border: none;
  background: #fff;
}

/* mobile stacked layout */
.editor-toggle-btn {
  display: none;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: 46vh 1fr;
  }
  .preview-pane {
    padding: 16px;
    border-bottom: 1px solid var(--border);
  }
  .device-frame.phone {
    width: 220px;
    height: 100%;
    max-height: 400px;
  }
  .device-frame.browser {
    height: 100%;
    max-height: 380px;
  }
  .editor-pane {
    padding-bottom: 40px;
  }
}
@media (max-width: 700px) {
  .topbar-right .label-text { display: none; }
  .topbar-right .btn-sm { padding: 8px 11px; }
}
@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
  .mode-tabs button span.label-text { display: none; }
  .topbar-left { gap: 10px; }
}