/* ChemStore Checker — styles.css */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-primary: #0f766e;
  --color-primary-hover: #0d9488;
  --color-primary-light: #ccfbf1;
  --color-danger: #dc2626;
  --color-danger-light: #fef2f2;
  --color-danger-border: #fecaca;
  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --color-warning-border: #fde68a;
  --color-success: #16a34a;
  --color-success-light: #f0fdf4;
  --color-success-border: #bbf7d0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 100;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  font-size: 1.1rem;
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-icon {
  color: var(--color-primary);
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
  color: #fff;
  padding: 48px 0;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
}

.hero-sub {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
}

/* Checker App */
.checker-app {
  padding: 32px 0;
}

.app-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.panel h2 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.panel-hint {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

/* Presets */
.preset-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding: 12px;
  background: var(--color-surface-alt);
  border-radius: var(--radius);
}

.preset-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.btn-preset {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 4px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--color-text);
  font-family: var(--font);
  transition: all 0.15s;
}

.btn-preset:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Category groups */
.category-group {
  margin-bottom: 16px;
}

.category-group h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--color-border);
}

.chem-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.chem-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.88rem;
  transition: background 0.15s;
}

.chem-item:hover {
  background: var(--color-surface-alt);
}

.chem-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* Custom add */
.custom-add {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.custom-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  display: block;
  margin-bottom: 6px;
}

.custom-row {
  display: flex;
  gap: 8px;
}

.custom-row input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-family: var(--font);
}

.custom-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.btn-add {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s;
}

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

#custom-list {
  margin-top: 8px;
  grid-template-columns: 1fr;
}

#custom-list .chem-item {
  background: var(--color-surface-alt);
  padding: 4px 8px;
}

.btn-remove-custom {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  margin-left: auto;
  padding: 0 4px;
  line-height: 1;
}

.btn-remove-custom:hover {
  color: var(--color-danger);
}

/* Results panel */
.results-summary {
  margin-bottom: 16px;
}

.summary-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--color-text-muted);
}

.summary-empty svg {
  margin-bottom: 12px;
}

.summary-safe {
  background: var(--color-success-light);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.summary-safe h3 {
  color: var(--color-success);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.summary-safe p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.summary-danger {
  background: var(--color-danger-light);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.summary-danger h3 {
  color: var(--color-danger);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.summary-danger p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Warnings */
.results-warnings {
  margin-bottom: 16px;
}

.warning-item {
  background: var(--color-danger-light);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
}

.warning-item h4 {
  color: var(--color-danger);
  font-size: 0.95rem;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.warning-item p {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.warning-severity {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-danger);
  color: #fff;
}

/* Zones */
.results-zones {
  margin-bottom: 16px;
}

.results-zones h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.zone-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
}

.zone-card h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.zone-card ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.zone-card li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 10px;
  font-size: 0.82rem;
}

.zone-icon {
  font-size: 1.1rem;
}

/* Actions */
.results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.btn-action {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  color: var(--color-text);
  transition: all 0.15s;
}

.btn-action:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.save-notice {
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--color-success);
  font-weight: 600;
}

/* Scenario section */
.scenario-section {
  padding: 40px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.scenario-section h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.scenario-section > .container > p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.scenario-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.scenario-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.scenario-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Mistakes section */
.mistakes-section {
  padding: 40px 0;
}

.mistakes-section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.mistakes-list {
  list-style: none;
  display: grid;
  gap: 12px;
}

.mistakes-list li {
  background: var(--color-warning-light);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.92rem;
  color: var(--color-text);
}

.mistakes-list strong {
  color: var(--color-warning);
}

/* FAQ section */
.faq-section {
  padding: 40px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.faq-section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-list dt {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.faq-list dd {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Assumptions */
.assumptions-section {
  padding: 40px 0;
}

.assumptions-section h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.assumptions-section p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

.last-updated {
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-nav ul {
  display: flex;
  list-style: none;
  gap: 16px;
}

.footer-nav a {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-nav a:hover {
  color: var(--color-primary);
}

/* Print */
@media print {
  .site-header, .site-footer, .preset-bar, .results-actions, .custom-add, .btn-preset, .btn-add {
    display: none !important;
  }
  .checker-app {
    padding: 0;
  }
  .app-layout {
    grid-template-columns: 1fr;
  }
  .panel {
    box-shadow: none;
    border: 1px solid #ccc;
  }
  body {
    background: #fff;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }
  .chem-list {
    grid-template-columns: 1fr;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 14px;
  }
  .hero {
    padding: 32px 0;
  }
  .hero h1 {
    font-size: 1.3rem;
  }
  .panel {
    padding: 16px;
  }
  .preset-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .results-actions {
    flex-direction: column;
  }
  .btn-action {
    width: 100%;
    text-align: center;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}