:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-border: #e0e2e7;
  --color-text: #1f2328;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-contrast: #ffffff;
  --color-danger: #dc2626;
  --color-on: #16a34a;
  --color-off: #9ca3af;
  --radius: 10px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  padding-bottom: env(safe-area-inset-bottom);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 {
  font-size: 1.1rem;
  margin: 0;
}

.app-main {
  padding: 12px;
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.loading,
.empty-state {
  color: var(--color-muted);
  text-align: center;
  padding: 24px 0;
}

.error-banner {
  background: #fef2f2;
  color: var(--color-danger);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 12px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.section-header h2 {
  margin: 0;
  font-size: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  touch-action: manipulation;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-muted);
  border-color: var(--color-border);
}

.login-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.product-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.product-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
}

.product-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.product-name {
  font-weight: 700;
}

.product-category,
.product-id {
  margin: 4px 0;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.badge-on {
  background: #dcfce7;
  color: var(--color-on);
}

.badge-off {
  background: #f3f4f6;
  color: var(--color-off);
}

.product-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
}

.toggle-label input {
  width: 20px;
  height: 20px;
}

.product-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
}

.product-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
  font-weight: 600;
}

.product-form input[type="text"],
.product-form input[type="url"],
.product-form textarea {
  font-size: 1rem;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
}

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
}

.required {
  color: var(--color-danger);
}

.form-error {
  background: #fef2f2;
  color: var(--color-danger);
  border: 1px solid #fecaca;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.85rem;
}

.form-actions {
  display: flex;
  gap: 8px;
}

.form-actions .btn {
  flex: 1;
}

.hint-note {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin-top: 0;
}

.hint-generated-at {
  color: var(--color-muted);
  font-size: 0.8rem;
}

.candidate-list {
  list-style: decimal;
  padding-left: 20px;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.candidate-item a {
  color: var(--color-primary);
  text-decoration: none;
  word-break: break-word;
}

.candidate-item a:hover {
  text-decoration: underline;
}

.candidate-meta {
  color: var(--color-muted);
  font-size: 0.8rem;
  margin-top: 2px;
}

@media (min-width: 480px) {
  .app-main {
    padding: 16px;
  }
}