/* Food Safety Tools — styles
 * Scoped under .fst-root. No global selectors, no element-only rules.
 * Mobile-first. Tap targets ~44px. Inputs >=16px. Body text >=13px.
 */

.fst-root {
  --fst-indigo: #4f46e5;
  --fst-indigo-600: #4338ca;
  --fst-indigo-50: #eef2ff;
  --fst-text: #111827;
  --fst-muted: #6b7280;
  --fst-border: #d1d5db;
  --fst-bg: #ffffff;
  --fst-warn: #b91c1c;
  --fst-warn-bg: #fef2f2;
  --fst-ok: #047857;
  --fst-ok-bg: #ecfdf5;
  --fst-radius: 10px;
  --fst-shadow: 0 1px 2px rgba(17, 24, 39, 0.06), 0 1px 3px rgba(17, 24, 39, 0.08);

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fst-text);
  background: var(--fst-bg);
  line-height: 1.5;
  font-size: 14px;
  max-width: 960px;
  margin: 24px auto;
  padding: 16px;
  box-sizing: border-box;
}

.fst-root *,
.fst-root *::before,
.fst-root *::after { box-sizing: border-box; }

.fst-root .fst-banner,
.fst-root .fst-tabs,
.fst-root .fst-panel,
.fst-root .fst-result,
.fst-root .fst-error,
.fst-root .fst-footer,
.fst-root .fst-tool,
.fst-root .fst-disclaimer {
  font-size: 14px;
}

.fst-root h1,
.fst-root h2,
.fst-root h3 { color: var(--fst-text); margin: 0 0 8px 0; }
.fst-root h2 { font-size: 20px; }
.fst-root h3 { font-size: 16px; }

.fst-root .fst-loading {
  padding: 24px;
  text-align: center;
  color: var(--fst-muted);
}

.fst-root .fst-noscript {
  border: 1px solid var(--fst-warn);
  background: var(--fst-warn-bg);
  color: var(--fst-warn);
  padding: 16px;
  border-radius: var(--fst-radius);
  margin-bottom: 16px;
}

.fst-root .fst-noscript p { margin: 0; }

/* Banner */
.fst-root .fst-banner {
  background: var(--fst-indigo-50);
  border: 1px solid var(--fst-indigo);
  border-radius: var(--fst-radius);
  padding: 16px;
  margin-bottom: 16px;
}
.fst-root .fst-banner h2 { color: var(--fst-indigo-600); margin-bottom: 6px; }
.fst-root .fst-banner p { margin: 0; color: var(--fst-text); }

/* Tabs */
.fst-root .fst-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  padding: 8px;
  background: #f9fafb;
  border: 1px solid var(--fst-border);
  border-radius: var(--fst-radius);
  position: sticky;
  top: 0;
  z-index: 5;
}
.fst-root .fst-tab {
  appearance: none;
  border: 1px solid var(--fst-border);
  background: var(--fst-bg);
  color: var(--fst-text);
  padding: 10px 12px;
  min-height: 44px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.fst-root .fst-tab:hover { background: var(--fst-indigo-50); }
.fst-root .fst-tab[aria-selected="true"] {
  background: var(--fst-indigo);
  border-color: var(--fst-indigo);
  color: #fff;
}
.fst-root .fst-tab:focus-visible {
  outline: 2px solid var(--fst-indigo);
  outline-offset: 2px;
}

.fst-root .fst-tab-select { display: none; }

/* Mobile narrow: swap tab strip for select */
@media (max-width: 480px) {
  .fst-root .fst-tabs { display: none; }
  .fst-root .fst-tab-select { display: block; }
}

/* Panel */
.fst-root .fst-panel {
  background: var(--fst-bg);
  border: 1px solid var(--fst-border);
  border-radius: var(--fst-radius);
  padding: 16px;
  box-shadow: var(--fst-shadow);
}
.fst-root .fst-panel[hidden] { display: none; }

.fst-root .fst-form { display: grid; gap: 12px; }
@media (min-width: 600px) {
  .fst-root .fst-form { grid-template-columns: 1fr 1fr; }
  .fst-root .fst-form .fst-field-full { grid-column: 1 / -1; }
}

.fst-root .fst-field { display: flex; flex-direction: column; gap: 4px; }
.fst-root .fst-field-full { grid-column: 1 / -1; }

.fst-root .fst-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--fst-text);
}
.fst-root .fst-help {
  font-size: 13px;
  color: var(--fst-muted);
  margin: 0;
}

.fst-root .fst-input,
.fst-root .fst-select {
  font-size: 16px;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--fst-border);
  border-radius: 8px;
  background: var(--fst-bg);
  color: var(--fst-text);
  width: 100%;
}
.fst-root .fst-input:focus,
.fst-root .fst-select:focus {
  border-color: var(--fst-indigo);
  outline: 2px solid var(--fst-indigo);
  outline-offset: 1px;
}
.fst-root .fst-input[aria-invalid="true"],
.fst-root .fst-select[aria-invalid="true"] {
  border-color: var(--fst-warn);
  outline-color: var(--fst-warn);
}

.fst-root .fst-radio-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.fst-root .fst-radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 6px 12px;
  border: 1px solid var(--fst-border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}
.fst-root .fst-radio-group input { transform: scale(1.2); }

/* Errors */
.fst-root .fst-error {
  display: none;
  background: var(--fst-warn-bg);
  color: var(--fst-warn);
  border: 1px solid var(--fst-warn);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  margin-top: 4px;
}
.fst-root .fst-error.is-shown { display: block; }

/* Buttons */
.fst-root .fst-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
  grid-column: 1 / -1;
}
.fst-root .fst-btn {
  appearance: none;
  border: 1px solid var(--fst-indigo);
  background: var(--fst-indigo);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  padding: 10px 16px;
  min-height: 44px;
  border-radius: 8px;
  cursor: pointer;
}
.fst-root .fst-btn:hover { background: var(--fst-indigo-600); }
.fst-root .fst-btn:focus-visible {
  outline: 2px solid var(--fst-indigo);
  outline-offset: 2px;
}
.fst-root .fst-btn-reset {
  background: transparent;
  color: var(--fst-indigo);
  border: 1px solid transparent;
}
.fst-root .fst-btn-reset:hover { background: var(--fst-indigo-50); }

/* Result */
.fst-root .fst-result {
  margin-top: 16px;
  border: 2px solid var(--fst-indigo);
  background: var(--fst-indigo-50);
  border-radius: var(--fst-radius);
  padding: 16px;
}
.fst-root .fst-result[hidden] { display: none; }
.fst-root .fst-result h3 { color: var(--fst-indigo-600); }
.fst-root .fst-result .fst-result-primary {
  font-size: 18px;
  font-weight: 700;
  color: var(--fst-text);
  margin: 0 0 8px 0;
}
.fst-root .fst-result .fst-result-explain {
  margin: 0 0 8px 0;
  color: var(--fst-text);
}
.fst-root .fst-result .fst-result-source {
  font-size: 13px;
  color: var(--fst-muted);
  margin: 0;
}

.fst-root .fst-result.is-warn {
  border-color: var(--fst-warn);
  background: var(--fst-warn-bg);
}
.fst-root .fst-result.is-warn h3,
.fst-root .fst-result.is-warn .fst-result-primary { color: var(--fst-warn); }

.fst-root .fst-result.is-ok {
  border-color: var(--fst-ok);
  background: var(--fst-ok-bg);
}
.fst-root .fst-result.is-ok h3,
.fst-root .fst-result.is-ok .fst-result-primary { color: var(--fst-ok); }

/* Disclaimer */
.fst-root .fst-disclaimer {
  background: #fffbeb;
  border: 1px solid #f59e0b;
  color: #92400e;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 13px;
  margin-top: 12px;
  grid-column: 1 / -1;
}

/* Footer */
.fst-root .fst-footer {
  margin-top: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--fst-border);
  color: var(--fst-muted);
  font-size: 13px;
  text-align: center;
}
.fst-root .fst-footer a { color: var(--fst-indigo); }