:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --text: #1b1a19;
  --muted: #6a6560;
  --border: #e5e1dc;
  --accent: #0f766e;
  --good: #0c7a43;
  --ni: #b26a00;
  --poor: #c62828;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312;
    --surface: #1e1d1b;
    --text: #f2efea;
    --muted: #a59f97;
    --border: #36332f;
    --accent: #2dd4bf;
    --good: #4ade80;
    --ni: #fbbf24;
    --poor: #f87171;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 17px/1.6 Georgia, "Times New Roman", serif;
  background: var(--bg);
  color: var(--text);
}

.wrap { max-width: 720px; margin: 0 auto; padding: 24px 16px 140px; }

nav { font: 14px/1.4 system-ui, sans-serif; display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 24px; }
nav a, .toggle a { color: var(--accent); }

.explain {
  font: 15px/1.5 system-ui, sans-serif;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 24px;
}
.explain p { margin: 0 0 6px; }
.toggle { font-weight: 600; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; color: #fff; }
.badge.bad { background: var(--poor); }
.badge.good { background: var(--good); }

h1 { line-height: 1.2; }
img { max-width: 100%; height: auto; display: block; border-radius: 8px; margin: 16px 0; }

.promo {
  font: 15px/1.4 system-ui, sans-serif;
  background: #fde68a;
  color: #3b2f00;
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}
.promo-slot { min-height: 52px; margin-bottom: 16px; }
.promo-slot .promo { margin-bottom: 0; }

.hero {
  padding: 48px 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0f766e, #134e4a);
  color: #f0fdfa;
}
.hero h1 { font-size: clamp(2rem, 6vw, 3.25rem); margin: 0 0 12px; }
.hero p { margin: 0; font-size: 1.15rem; }

.product {
  display: grid;
  gap: 12px;
  font: 16px/1.5 system-ui, sans-serif;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.product button {
  font: inherit;
  font-weight: 600;
  padding: 12px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  justify-self: start;
}
.cart-count { font-variant-numeric: tabular-nums; }

.vitals {
  position: fixed;
  right: 16px;
  bottom: 16px;
  min-width: 210px;
  font: 14px/1.4 system-ui, sans-serif;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: 0 8px 24px rgb(0 0 0 / .12);
}
.vitals .row { display: flex; justify-content: space-between; gap: 16px; margin-top: 6px; }
.vitals output { font-weight: 700; font-variant-numeric: tabular-nums; }
.vitals [data-rating="good"] output { color: var(--good); }
.vitals [data-rating="needs-improvement"] output { color: var(--ni); }
.vitals [data-rating="poor"] output { color: var(--poor); }
.vitals .note { margin: 8px 0 0; color: var(--muted); font-size: 12px; }

@media (max-width: 480px) {
  .vitals { left: 16px; right: 16px; }
}