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

:root {
  --sf-primary: #245f55;
  --sf-primary-dark: #143d3a;
  --sf-secondary: #52ab98;
  --sf-bg: #f7faf8;
  --sf-text: #253238;
  --sf-muted: #52656c;
  --sf-border: #e5efec;
  --sf-card: #ffffff;
  --sf-shadow: 0 8px 24px rgba(25, 64, 58, 0.08);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background: var(--sf-bg);
  color: var(--sf-text);
}

a {
  text-decoration: none;
  color: inherit;
}

header {
  background-color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  padding: 12px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.logo a {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--sf-primary);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links li a {
  font-weight: 600;
  color: #3c4a50;
  transition: color 0.2s ease;
}

.nav-links li a:hover {
  color: var(--sf-primary);
}

.hero {
  background: linear-gradient(120deg, var(--sf-primary-dark), #28786b);
  color: #fff;
  padding: 92px 20px;
  text-align: center;
}

.hero-inner {
  max-width: 980px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  padding: 7px 14px;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: rgba(255,255,255,0.1);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.12;
  margin-bottom: 22px;
}

.hero p {
  font-size: 1.22rem;
  max-width: 780px;
  margin: 0 auto 30px;
  color: #e8f5f2;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: #ffffff;
  color: #174843;
  box-shadow: 0 12px 28px rgba(0,0,0,0.16);
}

.btn-secondary {
  border: 1px solid rgba(255,255,255,0.5);
  color: #ffffff;
  background: rgba(255,255,255,0.08);
}

.section {
  max-width: 1120px;
  margin: 64px auto;
  padding: 0 20px;
}

.section-header {
  max-width: 820px;
  margin-bottom: 28px;
}

.section h2 {
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  line-height: 1.18;
  margin-bottom: 12px;
  color: #174843;
}

.section-lead {
  font-size: 1.08rem;
  color: var(--sf-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--sf-card);
  padding: 26px;
  border-radius: 18px;
  box-shadow: var(--sf-shadow);
  border: 1px solid var(--sf-border);
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
  color: var(--sf-primary);
}

.card p {
  color: #506168;
  font-size: 0.98rem;
}

.highlight {
  background: #ffffff;
  border: 1px solid #dcebe7;
  border-radius: 22px;
  padding: 34px;
  box-shadow: 0 10px 28px rgba(25, 64, 58, 0.08);
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 16px;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  background: #ffffff;
  border: 1px solid var(--sf-border);
  border-radius: 16px;
  padding: 20px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--sf-primary);
  color: #fff;
  font-weight: 800;
}

.data-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.data-pill {
  background: #edf7f4;
  border: 1px solid #cfe5df;
  color: var(--sf-primary);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.92rem;
}

.cta {
  background: linear-gradient(120deg, var(--sf-primary), var(--sf-secondary));
  color: #fff;
  border-radius: 24px;
  padding: 42px 28px;
  text-align: center;
}

.cta h2 {
  color: #fff;
}

.cta p {
  max-width: 760px;
  margin: 0 auto 24px;
  color: #eaf8f5;
  font-size: 1.08rem;
}

footer {
  background-color: var(--sf-primary-dark);
  color: #fff;
  text-align: center;
  padding: 24px 10px;
  margin-top: 60px;
}

.sf-disclaimer {
  max-width: 1040px;
  margin: 18px auto 0;
  padding: 13px;
  border: 1px dashed rgba(255,255,255,0.35);
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: #e7f4f1;
  font-size: 13px;
  line-height: 1.45;
}

@media (max-width: 720px) {
  .nav-container {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding: 70px 18px;
  }

  .highlight {
    padding: 24px;
  }
}

/* Contact / pilot report page */
.page-hero {
  background: linear-gradient(120deg, var(--sf-primary-dark), #28786b);
  color: #fff;
  padding: 72px 20px;
  text-align: center;
}

.page-hero-inner {
  max-width: 880px;
  margin: 0 auto;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 16px;
}

.page-hero p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.15rem;
  color: #e8f5f2;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.contact-box {
  background: #ffffff;
  border: 1px solid var(--sf-border);
  border-radius: 20px;
  box-shadow: var(--sf-shadow);
  padding: 28px;
}

.contact-box h2 {
  font-size: 1.45rem;
  color: var(--sf-primary);
  margin-bottom: 12px;
}

.contact-box p {
  color: var(--sf-muted);
  margin-bottom: 14px;
}

.contact-email {
  display: inline-flex;
  margin-top: 10px;
  color: var(--sf-primary);
  font-weight: 800;
  word-break: break-word;
}

.check-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.check-list li {
  background: #f2faf7;
  border: 1px solid #d7ebe5;
  border-radius: 14px;
  padding: 13px 14px;
  color: #3d5056;
}

.check-list li strong {
  color: var(--sf-primary);
}

.note-box {
  background: #fffaf0;
  border: 1px solid #f2dfb8;
  border-radius: 16px;
  padding: 18px;
  color: #5c4a22;
  margin-top: 20px;
}

@media (max-width: 820px) {
  .contact-panel {
    grid-template-columns: 1fr;
  }
}

/* Food estimator live API prototype */
.food-estimator-live {
  background: var(--sf-card);
  border: 1px solid var(--sf-border);
  border-radius: 18px;
  box-shadow: var(--sf-shadow);
  padding: 28px;
}

.food-search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 18px;
}

.food-search-row input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--sf-border);
  border-radius: 12px;
  font-size: 1rem;
}

.food-results {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.food-result-item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--sf-border);
  background: #fff;
  border-radius: 14px;
  padding: 14px 16px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.food-result-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--sf-shadow);
}

.food-result-item strong {
  display: block;
  color: var(--sf-primary-dark);
  margin-bottom: 4px;
}

.food-result-item span {
  color: var(--sf-muted);
  font-size: 0.95rem;
}

.nutrition-panel {
  margin-top: 24px;
  border-top: 1px solid var(--sf-border);
  padding-top: 22px;
}

.nutrition-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.nutrition-card {
  border: 1px solid var(--sf-border);
  border-radius: 14px;
  padding: 14px;
  background: #fbfdfc;
}

.nutrition-card strong {
  display: block;
  color: var(--sf-primary-dark);
  font-size: 1.25rem;
}

.nutrition-card span {
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.source-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #f0f7f5;
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.api-status {
  margin-top: 12px;
  color: var(--sf-muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .food-search-row {
    grid-template-columns: 1fr;
  }
}

.food-result-item.active-food-result {
  border-color: var(--sf-secondary);
  background: #f0f7f5;
}

.food-result-item small {
  display: block;
  color: var(--sf-muted);
  font-size: 0.84rem;
  margin-bottom: 4px;
}

/* Element flow display */
.quantity-row {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.quantity-row label {
  font-weight: 700;
  color: var(--sf-primary-dark);
}

.quantity-row input {
  width: 120px;
  padding: 10px 12px;
  border: 1px solid var(--sf-border);
  border-radius: 10px;
  font-size: 1rem;
}

.element-flow-panel {
  margin-top: 26px;
  border-top: 1px solid var(--sf-border);
  padding-top: 22px;
}

.element-flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.element-flow-card {
  border: 1px solid var(--sf-border);
  border-radius: 14px;
  padding: 14px;
  background: #fffaf2;
}

.element-flow-card strong {
  display: block;
  color: var(--sf-primary-dark);
  font-size: 1.2rem;
}

.element-flow-card span {
  display: block;
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.element-flow-card small {
  display: block;
  margin-top: 6px;
  color: var(--sf-muted);
  font-size: 0.8rem;
}

.flow-note {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #fff6e6;
  color: var(--sf-muted);
  font-size: 0.92rem;
}

/* Recipe / product builder MVP */
.recipe-builder-panel {
  margin-top: 28px;
  border-top: 1px solid var(--sf-border);
  padding-top: 24px;
}

.recipe-builder-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0;
}

.recipe-items {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.recipe-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--sf-border);
  background: #fff;
  border-radius: 14px;
  padding: 12px 14px;
}

.recipe-item strong {
  color: var(--sf-primary-dark);
}

.recipe-item span {
  color: var(--sf-muted);
  font-size: 0.92rem;
}

.recipe-item button {
  border: 1px solid var(--sf-border);
  background: #fff;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
}

.recipe-totals {
  margin-top: 20px;
  display: grid;
  gap: 22px;
}

.recipe-total-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}

.recipe-total-card {
  border: 1px solid var(--sf-border);
  border-radius: 14px;
  padding: 14px;
  background: #f8fbfa;
}

.recipe-total-card strong {
  display: block;
  color: var(--sf-primary-dark);
  font-size: 1.18rem;
}

.recipe-total-card span {
  color: var(--sf-muted);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .recipe-item {
    grid-template-columns: 1fr;
  }
}

.mapping-badge {
  display: inline-block;
  margin: 6px 0;
  padding: 4px 8px;
  border-radius: 999px;
  background: #fff6e6;
  color: var(--sf-primary-dark);
  font-size: 0.8rem;
  font-weight: 700;
}

.mapping-note {
  display: block;
  margin-top: 6px;
  color: var(--sf-muted);
  font-size: 0.84rem;
  line-height: 1.35;
}

.base-material-panel {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--sf-border);
}

.base-material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.base-material-card {
  background: #f8fcfa;
  border: 1px solid #dcebe7;
  border-radius: 14px;
  padding: 14px;
}

.base-material-card strong {
  display: block;
  color: var(--sf-primary);
  font-size: 1.02rem;
}

.base-material-card span,
.base-material-card small {
  display: block;
  color: var(--sf-muted);
  margin-top: 4px;
  font-size: 0.9rem;
}

/* Base material cards: match nutrition and element-flow card style */
.base-material-panel {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--sf-border);
}

.base-material-panel h3 {
  margin-bottom: 6px;
  color: #174843;
}

.base-material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.base-material-card {
  background: #f8fcfa;
  border: 1px solid #dcebe7;
  border-radius: 14px;
  padding: 18px 16px;
  box-shadow: 0 6px 18px rgba(25, 64, 58, 0.05);
}

.base-material-card strong {
  display: block;
  color: #143d3a;
  font-size: 1.35rem;
  line-height: 1.15;
  margin-bottom: 8px;
}

.base-material-card span {
  display: block;
  color: var(--sf-text);
  font-weight: 600;
  margin-bottom: 6px;
}

.base-material-card small {
  display: block;
  color: var(--sf-muted);
  font-size: 0.92rem;
  line-height: 1.45;
  margin-top: 4px;
}

.base-material-panel .flow-note {
  margin-top: 14px;
}

.recipe-total-card small {
  display: block;
  color: var(--sf-muted);
  font-size: 0.88rem;
  margin-top: 4px;
}

/* Compact base-material cards: same visual size family as nutrition cards */
.base-material-grid {
  grid-template-columns: repeat(auto-fill, minmax(160px, 200px));
  justify-content: start;
}

.base-material-card {
  min-height: 120px;
}

.base-material-card strong {
  font-size: 1.55rem;
}

.base-material-card span {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--sf-muted);
}

.base-material-card small {
  font-size: 0.82rem;
  line-height: 1.35;
}

.base-material-card small:nth-of-type(n+3) {
  display: none;
}