:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-muted: #eef3f8;
  --text: #18212f;
  --muted: #667085;
  --line: #d7e0ea;
  --accent: #1769aa;
  --accent-strong: #0f4f82;
  --accent-soft: #e8f3fc;
  --danger: #bd2f2f;
  --shadow: 0 12px 32px rgba(31, 45, 61, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
  padding: 0.8rem 1rem;
  transition: background 150ms ease, transform 150ms ease;
}

button:hover {
  background: var(--accent-strong);
}

button:active {
  transform: translateY(1px);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(23, 105, 170, 0.22);
  outline-offset: 2px;
}

.secondary-button {
  background: var(--surface-muted);
  color: var(--text);
}

.secondary-button:hover {
  background: #dde8f2;
}

.app-shell {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin: 0 auto;
  max-width: 920px;
  padding: 1.25rem;
}

.builder-panel,
.preview-panel,
.export-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading.compact {
  align-items: end;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 0.35rem;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  line-height: 1.1;
}

h2 {
  font-size: 1.15rem;
}

.field-form {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.2rem;
}

.control-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field span,
.check-row span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.field input,
.field select,
.html-output {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  min-height: 2.85rem;
  padding: 0.7rem 0.8rem;
  width: 100%;
}

.field-options {
  grid-column: 1 / -1;
}

.is-hidden {
  display: none;
}

.form-actions,
.export-actions,
.list-header {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
}

.form-actions {
  margin-top: 1rem;
}

.check-row {
  align-items: center;
  display: inline-flex;
  gap: 0.55rem;
}

.check-row input {
  accent-color: var(--accent);
  height: 1rem;
  width: 1rem;
}

.field-list-wrap {
  padding-top: 1.1rem;
}

.field-list {
  display: grid;
  gap: 0.65rem;
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
}

.field-item {
  align-items: center;
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr auto;
  padding: 0.8rem;
}

.field-summary {
  min-width: 0;
}

.field-summary strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.field-meta {
  color: var(--muted);
  display: block;
  font-size: 0.82rem;
  margin-top: 0.2rem;
}

.field-controls {
  display: flex;
  gap: 0.35rem;
}

.icon-button {
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--text);
  min-width: 2.25rem;
  padding: 0.45rem 0.55rem;
}

.icon-button:hover {
  background: var(--accent-soft);
}

.icon-button.remove {
  color: var(--danger);
}

.empty-state,
.preview-empty {
  color: var(--muted);
  margin: 0.8rem 0 0;
}

.generated-form {
  border: 1px dashed var(--line);
  border-radius: 8px;
  display: grid;
  gap: 1rem;
  min-height: 220px;
  padding: 1rem;
}

.preview-field {
  display: grid;
  gap: 0.4rem;
}

.preview-field label,
.choice-group legend {
  color: var(--text);
  font-weight: 800;
}

.preview-field input,
.preview-field select,
.preview-field textarea {
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 2.75rem;
  padding: 0.7rem 0.8rem;
  width: 100%;
}

.preview-field textarea {
  min-height: 7rem;
  resize: vertical;
}

.choice-group {
  border: 0;
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
}

.choice-row {
  align-items: center;
  color: var(--muted);
  display: flex;
  gap: 0.5rem;
}

.choice-row input {
  accent-color: var(--accent);
  width: auto;
}

.preview-submit {
  justify-self: start;
}

.html-output {
  display: block;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  margin-top: 0.9rem;
  min-height: 260px;
  resize: vertical;
}

@media (max-width: 620px) {
  .app-shell {
    padding: 0.75rem;
  }

  .builder-panel,
  .preview-panel,
  .export-panel {
    padding: 1rem;
  }

  .control-grid {
    grid-template-columns: 1fr;
  }

  .form-actions,
  .export-actions,
  .list-header,
  .section-heading.compact {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    width: 100%;
  }

  .field-item {
    grid-template-columns: 1fr;
  }

  .field-controls {
    justify-content: stretch;
  }

  .field-controls button {
    flex: 1;
  }
}