:root {
  --color-onyx-canvas: #171721;
  --color-graphite-card: #1e1e2a;
  --color-obsidian-button: #272735;
  --color-ash-text: #c3c3cc;
  --color-ivory-text: #ededf3;
  --color-cobalt: #5266eb;
  --color-pure-white: #ffffff;
  --font-arcadia: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-arcadiadisplay: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --page-max-width: 1200px;
  --section-gap: 72px;
  --card-padding: 32px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-onyx-canvas);
  color: var(--color-ivory-text);
  font-family: var(--font-arcadia);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
h1, h2, h3 {
  font-family: var(--font-arcadiadisplay);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.015em;
  margin: 0 0 12px;
}
h1 { font-size: clamp(32px, 5vw, 49px); line-height: 1.1; }
h2 { font-size: 32px; }
h3 { font-size: 21px; line-height: 1.35; }
p { margin: 0 0 12px; }
.sub, .lede { color: var(--color-ash-text); }
.lede { font-size: 18px; line-height: 1.35; max-width: 640px; margin: 0 auto 24px; }
.sub { font-size: 18px; max-width: 640px; }
.muted { color: var(--color-ash-text); font-size: 14px; }

/* Nav — transparent over hero, blur on scroll */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: transparent;
  transition: background .25s ease;
}
.nav.scrolled {
  background: rgba(23, 23, 33, .85);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
.nav-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 500; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--color-ivory-text);
  position: relative; display: inline-block;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 5px;
  border-radius: 50%; background: var(--color-ivory-text);
}
.nav-links { display: flex; gap: 24px; }
.nav-links a { text-decoration: none; color: var(--color-ivory-text); font-size: 14px; opacity: .9; }
.nav-links a:hover { opacity: 1; text-decoration: underline; }

/* Buttons — pill only, cobalt reserved for primary */
.btn {
  display: inline-block;
  border-radius: 32px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  line-height: 1;
}
.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-primary {
  background: var(--color-cobalt);
  color: var(--color-pure-white);
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: transparent;
  color: var(--color-ivory-text);
  border-color: var(--color-ivory-text);
}
.btn-ghost:hover { background: var(--color-obsidian-button); }

/* Hero — full-bleed alpine blue-hour feel, no external image */
.hero {
  min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 128px 24px 72px;
  background:
    linear-gradient(rgba(23,23,33,.72), rgba(23,23,33,.92)),
    radial-gradient(900px 480px at 20% 10%, #2b3a8f 0%, transparent 60%),
    radial-gradient(800px 500px at 85% 25%, #3a4670 0%, transparent 55%),
    radial-gradient(1000px 600px at 50% 100%, #23233a 0%, #171721 65%),
    var(--color-onyx-canvas);
}
.hero-inner { max-width: 640px; }
.eyebrow {
  display: inline-block;
  font-size: 12px; letter-spacing: .12px;
  color: var(--color-ash-text);
  border: 1px solid var(--color-ash-text);
  border-radius: 40px;
  padding: 8px 16px;
  margin-bottom: 20px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 8px 0 16px; }
.hero-note { color: var(--color-ash-text); font-size: 14px; }
.stats { display: flex; gap: 12px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }
.stat {
  background: var(--color-graphite-card);
  border-radius: 12px;
  padding: 16px 24px;
  min-width: 150px;
}
.stat strong { display: block; font-size: 21px; font-weight: 500; }
.stat span { color: var(--color-ash-text); font-size: 14px; }

/* Sections — 1200px wrap, 72px rhythm, graphite cards, no shadows */
.section { padding: var(--section-gap) 24px; }
.wrap { max-width: var(--page-max-width); margin: 0 auto; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 32px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 32px; }
.card {
  background: var(--color-graphite-card);
  border-radius: 12px;
  padding: var(--card-padding);
  box-shadow: none;
  border: 0;
}
.step { color: var(--color-ash-text); font-size: 14px; letter-spacing: .07px; }
.price { font-size: 28px; font-weight: 500; margin-top: 12px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
.center { text-align: center; margin-top: 32px; }

/* Species pills */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span {
  border: 1px solid var(--color-ash-text);
  border-radius: 40px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-ivory-text);
}
.tags-card p { color: var(--color-ash-text); }

/* Footer — disclaimer strip */
.footer { padding: 40px 24px 56px; border-top: 1px solid var(--color-obsidian-button); }
.footer-inner { text-align: left; }
.disclaimer { color: var(--color-ash-text); font-size: 12px; letter-spacing: .01em; font-weight: 500; }
.footer a { color: var(--color-ivory-text); }

/* Responsive */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2, .split { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  h2 { font-size: 28px; }
}

/* App imagery — Mercury flat cards, no shadows */
.brand-icon {
  width: 28px; height: 28px;
  border-radius: 8px;
  display: block;
}
.app-icon {
  width: 96px; height: 96px;
  border-radius: 22px;
  display: block;
  margin: 0 auto 20px;
}
.species-strip {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 24px 0 8px;
}
.species-strip img {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--color-graphite-card);
  object-fit: cover;
}
.species-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 32px;
}
.species-card { text-align: left; }
.species-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  object-fit: cover;
  background: var(--color-obsidian-button);
  display: block;
  margin-bottom: 16px;
}
.species-card h3 { margin-bottom: 4px; }
.species-card p { color: var(--color-ash-text); font-size: 14px; margin: 0; }

@media (max-width: 900px) {
  .species-grid { grid-template-columns: repeat(2, 1fr); }
  .app-icon { width: 80px; height: 80px; }
}

/* SEO guides — same Mercury tokens */
.breadcrumb { color: var(--color-ash-text); font-size: 14px; margin-bottom: 16px; }
.breadcrumb a { color: var(--color-ash-text); }
.article-hero { padding: 128px 24px 40px; }
.article-hero .wrap { max-width: 800px; }
.article-hero img.hero-species {
  width: 120px; height: 120px; border-radius: 24px;
  display: block; margin-bottom: 20px;
  background: var(--color-graphite-card);
}
.prose { max-width: 800px; margin: 0 auto; }
.prose h2 { font-size: 24px; margin-top: 40px; }
.prose ul, .prose ol { color: var(--color-ash-text); line-height: 1.7; }
.prose li { margin-bottom: 8px; }
.faq { margin-top: 16px; display: grid; gap: 12px; }
.faq .card h3 { font-size: 18px; }
.faq .card p { color: var(--color-ash-text); margin: 0; }
.related { margin-top: 40px; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 16px; }
.related-grid a {
  background: var(--color-graphite-card); border-radius: 12px;
  padding: 20px; text-decoration: none; display: block;
}
.related-grid a strong { display: block; margin-bottom: 4px; }
.related-grid a span { color: var(--color-ash-text); font-size: 14px; }
.guide-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 32px; }
.guide-list a {
  background: var(--color-graphite-card); border-radius: 12px;
  padding: 20px; text-decoration: none;
}
.guide-list img { width: 56px; height: 56px; border-radius: 12px; display: block; margin-bottom: 12px; }
.guide-list strong { display: block; }
.guide-list span { color: var(--color-ash-text); font-size: 14px; }
@media (max-width: 900px) {
  .related-grid, .guide-list { grid-template-columns: repeat(2, 1fr); }
}

/* Data-driven library — linked cards + most-played badges */
a.card { text-decoration: none; color: inherit; display: block; }
a.card:hover { background: var(--color-obsidian-button); }
.badge {
  display: inline-block; font-size: 12px; font-weight: 500;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--color-ivory-text);
  border: 1px solid var(--color-ash-text);
  border-radius: 40px; padding: 4px 12px; margin-bottom: 12px;
}