.sigfig-app {
  display: block;
}

.sigfig-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 16px;
}

.sigfig-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg);
  border-radius: 10px;
  padding: 6px 14px;
  font-weight: 600;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.sigfig-tab[aria-selected="true"] {
  background: var(--primary-bg);
  border-color: var(--primary-bg);
  color: var(--primary-fg);
  transform: translateY(-1px);
}

.sigfig-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sigfig-panel {
  margin-bottom: 16px;
}

.sigfig-field-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.sigfig-field {
  flex: 1 1 220px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sigfig-field span {
  font-weight: 600;
}

.sigfig-field .input,
.sigfig-field select,
.sigfig-field textarea {
  width: 100%;
}

.sigfig-field textarea {
  min-height: 140px;
  resize: vertical;
}

.sigfig-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.sigfig-error {
  margin-top: 12px;
  color: #b91c1c;
  font-weight: 600;
}

.sigfig-results {
  display: grid;
  gap: 16px;
}

.sigfig-summary {
  display: grid;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}

.sigfig-summary-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}

.sigfig-summary-label {
  min-width: 160px;
  font-weight: 600;
  color: var(--muted);
}

.sigfig-summary-value {
  font-weight: 700;
  font-size: 1.15rem;
}

.sigfig-summary-detail {
  font-size: 0.9rem;
  color: var(--muted);
}

.sigfig-steps {
  font-variant-numeric: tabular-nums;
  padding-left: 20px;
}

.sigfig-steps li {
  margin-bottom: 6px;
}

.sigfig-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.sigfig-table th,
.sigfig-table td {
  border-bottom: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

.sigfig-table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

.sigfig-hint {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 8px;
}

@media (max-width: 720px) {
  .sigfig-field {
    flex: 1 1 100%;
  }
  .sigfig-summary-label {
    min-width: auto;
  }
}