/* ==========================================================
   DESIGN TOKENS
   Palette and type loosely follow the U.S. Web Design System
   (Public Sans + Merriweather, navy/slate neutrals).
   ========================================================== */
:root {
  --color-bg: #f3f5f8;
  --color-surface: #ffffff;
  --color-surface-alt: #edf1f6;
  --color-border: #d4dbe4;
  --color-text: #1c2733;
  --color-text-muted: #4f5d6b;
  --color-primary: #1a4480;
  --color-primary-dark: #162e51;
  --color-primary-darker: #0f1f38;
  --color-primary-light: #e5edf8;
  --color-accent: #0f7c8a;

  --color-warning-bg: #fbf4d8;
  --color-warning-border: #e5a000;
  --color-warning-text: #3d2f00;

  --color-risk-low: #2f9e5c;
  --color-risk-moderate: #d9a91a;
  --color-risk-high: #c05600;
  --color-risk-veryhigh: #b50909;

  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 6px;

  --shadow-sm: 0 1px 2px rgba(15, 31, 56, 0.08);
  --shadow-md: 0 4px 16px rgba(15, 31, 56, 0.10);

  --max-width: 1080px;
  --font-sans: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Merriweather", Georgia, Cambria, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

a { color: var(--color-primary); text-underline-offset: 2px; }
a:hover { color: var(--color-primary-dark); }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1px 5px;
}

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

section {
  padding: 72px 0;
  scroll-margin-top: 64px;
}

/* Alternate white and slate bands between sections */
#predict, #methodology { background: var(--color-surface); }
#about, #methodology, #limitations { border-top: 1px solid var(--color-border); }

h1, h2, h3 { line-height: 1.25; }

h2.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.85rem;
  margin: 0 0 14px;
  color: var(--color-primary-dark);
}

p.section-subtitle {
  color: var(--color-text-muted);
  margin: 0 0 32px;
  max-width: 700px;
  font-size: 1.04rem;
}

/* ==========================================================
   HEADER / NAV
   ========================================================== */
.site-banner {
  background: var(--color-primary-darker);
  color: #c9d5e5;
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}

.site-banner .container {
  padding-top: 6px;
  padding-bottom: 6px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
  font-size: 1.05rem;
}

.brand .brand-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.brand .brand-mark svg { width: 22px; height: 22px; }

.nav-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 6px 0;
  border-bottom: 3px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ==========================================================
   HERO
   ========================================================== */
.hero {
  padding: 80px 0 64px;
  color: #ffffff;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='200' viewBox='0 0 600 200'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.07' stroke-width='1.5'%3E%3Cpath d='M0 40 C150 10 150 70 300 40 C450 10 450 70 600 40'/%3E%3Cpath d='M0 90 C150 60 150 120 300 90 C450 60 450 120 600 90'/%3E%3Cpath d='M0 140 C150 110 150 170 300 140 C450 110 450 170 600 140'/%3E%3Cpath d='M0 190 C150 160 150 220 300 190 C450 160 450 220 600 190'/%3E%3C/g%3E%3C/svg%3E"),
    linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 55%, var(--color-primary-darker) 100%);
  border-bottom: 4px solid var(--color-accent);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a9c8ea;
  border-left: 3px solid var(--color-accent);
  padding: 2px 0 2px 10px;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.2vw, 2.85rem);
  line-height: 1.2;
  margin: 0 0 18px;
  color: #ffffff;
  max-width: 800px;
}

.hero p.lead {
  font-size: 1.12rem;
  color: #d5e1ef;
  max-width: 660px;
  margin: 0 0 28px;
}

.hero .disclaimer { max-width: 760px; }

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.btn:focus-visible { outline: 3px solid #2491ff; outline-offset: 2px; }
.btn:disabled { opacity: 0.7; cursor: progress; }

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

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

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

.btn-secondary:hover { background: var(--color-primary-light); color: var(--color-primary-dark); }

/* Buttons on the dark hero */
.hero .btn-primary { background: #ffffff; color: var(--color-primary-dark); }
.hero .btn-primary:hover { background: var(--color-primary-light); }
.hero .btn-secondary { background: transparent; color: #ffffff; border-color: rgba(255, 255, 255, 0.75); }
.hero .btn-secondary:hover { background: rgba(255, 255, 255, 0.1); color: #ffffff; }

/* ==========================================================
   DISCLAIMER BANNER (reused near top and near results)
   ========================================================== */
.disclaimer {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--color-warning-bg);
  border-left: 8px solid var(--color-warning-border);
  color: var(--color-warning-text);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 28px 0;
  font-size: 0.94rem;
}

.disclaimer .disclaimer-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-warning-text);
  color: var(--color-warning-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
  margin-top: 1px;
}

.disclaimer strong { display: block; margin-bottom: 2px; font-size: 1rem; }

.disclaimer[hidden] { display: none; }

/* ==========================================================
   ABOUT SECTION
   ========================================================== */
.about-graphs {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 820px;
  margin: 8px auto 0;
}

.graph-card {
  margin: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-md);
}

.graph-card img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
}

.graph-card figcaption {
  margin: 14px 2px 2px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.sources-list {
  list-style: none;
  max-width: 820px;
  margin: 24px auto 0;
  padding: 16px 20px;
  display: grid;
  gap: 8px;
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-primary);
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

.sources-list a {
  color: var(--color-primary);
  font-weight: 600;
}

/* ==========================================================
   FORM / PREDICTION SECTION
   ========================================================== */
.predict-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

form#pfas-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

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

.field.full-width {
  grid-column: 1 / -1;
}

.field label {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-text);
}

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

.field input,
.field select {
  padding: 11px 13px;
  border: 1px solid #8d98a6;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.12s ease;
}

.field select {
  appearance: none;
  padding-right: 40px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%231c2733' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}

.field select:invalid { color: var(--color-text-muted); }
.field select option { color: var(--color-text); }

.field input:focus,
.field select:focus {
  outline: 3px solid #2491ff;
  outline-offset: 0;
  border-color: var(--color-primary);
}

.field input.invalid,
.field select.invalid {
  border-color: var(--color-risk-veryhigh);
  box-shadow: inset 0 0 0 1px var(--color-risk-veryhigh);
}

.field .error-text {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-risk-veryhigh);
  min-height: 1em;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 4px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.form-note {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ==========================================================
   RESULTS SECTION
   ========================================================== */
#results-section {
  display: none;
  border-top: 1px solid var(--color-border);
}

#results-section.visible {
  display: block;
}

.results-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.estimate-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 8px 0 28px;
}

.estimate-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 5px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.estimate-tile.q50 { border-top-color: var(--color-accent); }
.estimate-tile.q95,
.estimate-tile.q99 { border-top-color: var(--color-border); }

.estimate-tile .estimate-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.estimate-tile .estimate-value {
  font-family: var(--font-serif);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 6px 0 6px;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.estimate-tile .estimate-value .lt {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-right: 4px;
}

.estimate-tile .estimate-desc {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin: 0;
}

.estimate-tile .estimate-warning {
  margin: 10px 0 0;
  font-size: 0.8rem;
  color: var(--color-warning-text);
  background: var(--color-warning-bg);
  border-left: 3px solid var(--color-warning-border);
  padding: 6px 10px;
}

.estimate-tile .estimate-cap {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-warning-text);
  background: var(--color-warning-bg);
  border-left: 3px solid var(--color-warning-border);
  padding: 2px 8px;
}

.estimate-tile .estimate-cap[hidden] { display: none; }

.risk-score-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.score-tile {
  padding: 4px 0;
}

.score-tile .score-label {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.score-tile .score-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
}

.meter-track {
  width: 100%;
  height: 10px;
  background: var(--color-surface-alt);
  border-radius: 999px;
  overflow: hidden;
  margin: 10px 0 4px;
}

.meter-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.4s ease;
}

#results-summary-text {
  color: var(--color-text-muted);
  margin: 0 0 10px;
}

/* ==========================================================
   METHODOLOGY / LIMITATIONS
   ========================================================== */
.method-steps {
  display: grid;
  gap: 16px;
  margin-top: 8px;
}

.method-step {
  display: flex;
  gap: 18px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}

.method-step .step-num {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.95rem;
}

.method-step h3 {
  font-family: var(--font-serif);
  margin: 2px 0 6px;
  font-size: 1.05rem;
  color: var(--color-primary-dark);
}

.method-step p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.formula-box {
  margin-top: 24px;
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
}

.formula-box .formula-line {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  margin-bottom: 14px;
}

.formula-box p {
  margin: 14px 0 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.formula-table {
  border-collapse: collapse;
  width: 100%;
  max-width: 560px;
  font-size: 0.92rem;
  background: var(--color-surface);
}

.formula-table th,
.formula-table td {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
}

.formula-table th {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
}

.compounds {
  margin-top: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}

.compounds h3 {
  font-family: var(--font-serif);
  color: var(--color-primary-dark);
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.compounds > p {
  margin: 0 0 16px;
  color: var(--color-text-muted);
  font-size: 0.94rem;
  max-width: 760px;
}

.compound-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 6px 20px;
}

.compound-list li {
  display: grid;
  grid-template-columns: 8.5em 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.86rem;
}

.compound-list abbr {
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
  font-variant-numeric: tabular-nums;
}

.compound-list span { color: var(--color-text-muted); overflow-wrap: anywhere; }

#author {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.author {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 32px;
  align-items: center;
}

.author-text {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-text);
}

.author-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.author-photos img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

@media (max-width: 760px) {
  .author { grid-template-columns: 1fr; gap: 20px; }
}

.limitations-list {
  display: grid;
  gap: 12px;
  margin-top: 8px;
  padding: 0;
  list-style: none;
}

.limitations-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 6px solid var(--color-risk-high);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.94rem;
  color: var(--color-text);
}

.limitations-list li strong {
  color: var(--color-primary-dark);
}

/* ==========================================================
   FOOTER
   ========================================================== */
footer.site-footer {
  background: var(--color-primary-darker);
  color: #c9d5e5;
  border-top: 4px solid var(--color-accent);
  padding: 48px 0 32px;
}

footer .disclaimer {
  margin-top: 0;
}

footer .footer-bottom {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: #a9b8cc;
}

/* ==========================================================
   WHY IT MATTERS (top of page)
   ========================================================== */
.threat {
  background: #f7f1e8;
  border-bottom: 1px solid #e3d6c3;
  padding: 32px 0 28px;
  color: var(--color-text);
}

.threat-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.threat h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: #5a2a14;
  margin: 0 0 10px;
}

.threat p {
  margin: 0 0 10px;
  font-size: 0.97rem;
  color: #3b2f26;
}

.threat-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 3px solid #b5651d;
}

.threat-facts li {
  padding: 8px 0 8px 16px;
  font-size: 0.92rem;
  color: #3b2f26;
}

.threat-facts li + li { border-top: 1px solid #e3d6c3; }

.threat-facts b {
  font-family: var(--font-serif);
  color: #8a3b12;
  margin-right: 4px;
}

.threat-sources {
  margin-top: 14px;
  font-size: 0.78rem;
  color: #6b5a4a;
}

.threat-sources a { color: #6b3a1c; }

@media (max-width: 760px) {
  .threat-inner { grid-template-columns: 1fr; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
}

/* ==========================================================
   ENGAGEMENT: hero stats, steps, location picker, results extras
   ========================================================== */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 860px;
}

.hero-stat {
  background: rgba(15, 31, 56, 0.55);
  padding: 16px 18px;
}

.hero-stat .num {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.hero-stat .lbl {
  font-size: 0.82rem;
  color: #b9cbe2;
}

.steps {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  counter-reset: step;
}

.steps li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-weight: 600;
  font-size: 0.94rem;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.9rem;
}

.loc-block {
  grid-column: 1 / -1;
}

.loc-block .loc-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.loc-block .loc-title {
  font-weight: 700;
  font-size: 0.92rem;
}

.loc-block .loc-title span {
  display: block;
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.loc-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-small {
  padding: 7px 14px;
  font-size: 0.85rem;
}

#loc-map {
  height: 340px;
  border: 1px solid #8d98a6;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  cursor: crosshair;
}

.loc-status {
  min-height: 1.2em;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.loc-status.error { color: var(--color-risk-veryhigh); font-weight: 600; }

.nav-links a.nav-cta {
  background: var(--color-primary);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border-bottom: none;
}

.nav-links a.nav-cta:hover { background: var(--color-primary-dark); color: #ffffff; }

.us-only-note {
  margin: 0 0 10px;
  padding: 9px 14px;
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text);
}

.results-context {
  margin: 0 0 20px;
  padding: 12px 16px;
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
}

.results-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 760px) {
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: 1fr; }
  #loc-map { height: 280px; }
}

/* ==========================================================
   RESPONSIVE
   ========================================================== */

@media (max-width: 860px) {
  .estimate-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  section { padding: 48px 0; }
  .hero { padding: 56px 0 44px; }
  form#pfas-form { grid-template-columns: 1fr; }
  .predict-panel, .results-panel { padding: 22px; }
  .nav-links { gap: 14px; }
  .nav-inner { flex-wrap: nowrap; padding: 10px 16px; }
  .brand { font-size: 0.95rem; gap: 8px; }
  .brand .brand-mark { width: 30px; height: 30px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-links a.nav-cta { white-space: nowrap; }
  .estimate-row { grid-template-columns: 1fr; }
}

/* ==========================================================
   WHY I BUILT THIS PAGE
   ========================================================== */
.story {
  max-width: 720px;
}

.story p {
  font-size: 1.1rem;
  line-height: 1.75;
  margin: 0 0 18px;
}

.story .story-lead {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  line-height: 1.6;
  color: var(--color-primary-dark);
}

.story-photo {
  margin: 28px 0;
}

.story-photo img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.story-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.author-more {
  display: inline-block;
  margin-top: 14px;
  font-weight: 700;
  font-size: 1rem;
}

/* ==========================================================
   EXTRA TREES MODEL NOTE
   ========================================================== */
.method-subhead {
  font-family: var(--font-serif);
  color: var(--color-primary-dark);
  font-size: 1.15rem;
  margin: 32px 0 0;
}

.ml-box {
  margin-top: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.ml-box h3 {
  font-family: var(--font-serif);
  color: var(--color-primary-dark);
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.ml-box p {
  margin: 0 0 10px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 780px;
}

.ml-box p:last-child { margin-bottom: 0; }

/* ==========================================================
   PLAINER LAYOUT (2026-10 refresh)
   ========================================================== */
.hero-facts {
  margin: 28px 0 0;
  max-width: 660px;
  font-size: 0.95rem;
  color: #c3d3e8;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 16px;
}

/* steps: a simple numbered line instead of cards */
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
  margin: 0 0 20px;
  counter-reset: step;
}

.steps li {
  display: block;
  background: none;
  border: 0;
  padding: 0;
  font-weight: 500;
  color: var(--color-text-muted);
}

.steps li::before {
  content: counter(step) ". ";
  display: inline;
  width: auto;
  height: auto;
  background: none;
  color: var(--color-primary-dark);
  font-family: inherit;
  font-weight: 700;
  font-size: inherit;
}

/* methodology inputs: a plain list, no numbered cards */
.method-steps { gap: 0; }

.method-step {
  display: block;
  background: none;
  border: 0;
  border-top: 1px solid var(--color-border);
  border-radius: 0;
  padding: 16px 0;
}

.method-step:last-child { border-bottom: 1px solid var(--color-border); }
.method-step .step-num { display: none; }

/* limitations: ordinary bullets */
.limitations-list {
  list-style: disc;
  padding-left: 1.2em;
  gap: 10px;
}

.limitations-list li {
  background: none;
  border: 0;
  border-radius: 0;
  padding: 0 0 0 4px;
}

/* results: plain key under the numbers */
.read-key {
  margin: 4px 0 24px;
  padding: 16px 0 0;
  border-top: 1px solid var(--color-border);
}

.read-key h3 {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  color: var(--color-primary-dark);
  margin: 0 0 8px;
}

.read-key ul {
  margin: 0 0 10px;
  padding-left: 1.2em;
  color: var(--color-text);
  font-size: 0.93rem;
}

.read-key li + li { margin-top: 6px; }

.read-key .results-context {
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.risk-score-row {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  margin-top: 8px;
}

.ml-box {
  border-left-width: 1px;
}

/* ==========================================================
   PFOS EATING GUIDELINES (results)
   ========================================================== */
.advisory {
  margin: 0 0 24px;
  padding: 16px 0 0;
  border-top: 1px solid var(--color-border);
}

.advisory h3 {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  color: var(--color-primary-dark);
  margin: 0 0 6px;
}

.advisory > p {
  margin: 0 0 12px;
  font-size: 0.93rem;
  max-width: 720px;
}

.advisory-table-wrap { overflow-x: auto; }

.advisory-table {
  border-collapse: collapse;
  width: 100%;
  max-width: 520px;
  font-size: 0.93rem;
}

.advisory-table th,
.advisory-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
}

.advisory-table th {
  font-weight: 700;
  background: var(--color-surface-alt);
}

.advisory-table td:first-child {
  border-left: 5px solid transparent;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.advisory-table .lvl-1 td:first-child { border-left-color: #2e8540; }
.advisory-table .lvl-2 td:first-child { border-left-color: #7fb135; }
.advisory-table .lvl-3 td:first-child { border-left-color: #e5a000; }
.advisory-table .lvl-4 td:first-child { border-left-color: #d9701a; }
.advisory-table .lvl-5 td:first-child { border-left-color: #b50909; }
.advisory-table .lvl-5 td:last-child { font-weight: 700; color: #b50909; }

.advisory-note {
  margin: 10px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 720px;
}

.ml-box h4 {
  font-size: 0.98rem;
  color: var(--color-primary-dark);
  margin: 18px 0 6px;
}

.ml-box ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 780px;
}

.ml-box li + li { margin-top: 6px; }
.ml-box li strong { color: var(--color-text); }

.exact-warning {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 10px 0 0;
  padding: 7px 10px;
  background: var(--color-warning-bg);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  line-height: 1.4;
  color: var(--color-warning-text);
}

.exact-warning svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 1px;
}

/* ==========================================================
   FOREVERCATCH BRANDING
   ========================================================== */
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-tag {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.74rem;
  color: var(--color-text-muted);
  margin-top: 3px;
}

.hero h1 {
  margin-bottom: 6px;
}

.hero-sub {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  color: #d5e1ef;
  margin: 0 0 20px;
}

@media (max-width: 640px) {
  .brand-tag { display: none; }
}

.threat h2 {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.threat-sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: #8a5a3a;
  margin-top: 4px;
}

.read-tip {
  margin: 0 0 12px;
  padding: 10px 14px;
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  color: var(--color-text);
  max-width: 760px;
}