/* Assay marketing site — canonical brand tokens & primitives */

:root {
  /* Color — core */
  --color-primary: #630ED4;
  --color-primary-variant: #520ba6;
  --color-primary-soft: rgba(99, 14, 212, 0.08);
  --color-obsidian: #1A1A2E;
  --color-obsidian-soft: rgba(26, 26, 46, 0.6);
  --color-surface: #fcf8f9;
  --color-gallery-white: #ffffff;
  --color-on-surface: #1A1A2E;
  --color-on-surface-variant: #4a4455;
  --color-on-primary: #ffffff;
  --color-outline: #7b7487;
  --color-outline-variant: #ccc3d8;

  /* Semantic */
  --color-verification: #00B894;
  --color-verification-soft: rgba(0, 184, 148, 0.12);
  --color-amber-truth: #F59E0B;
  --color-amber-soft: rgba(245, 158, 11, 0.14);
  --color-error: #ba1a1a;
  --color-error-soft: rgba(186, 26, 26, 0.12);

  /* Surface elevation */
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f5f2f3;
  --color-surface-container: #f0edee;
  --color-surface-container-high: #ebe7e8;
  --color-surface-container-highest: #e0dbdd;

  /* Type */
  --font-headline: "Newsreader", "Charter", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-quote: "Cormorant Garamond", "Newsreader", Georgia, serif;
  --font-mono: "Space Mono", "JetBrains Mono", ui-monospace, monospace;

  /* Shadows */
  --shadow-deep: 6px 6px 0 var(--color-obsidian);
  --shadow-jumbo: 8px 8px 0 var(--color-obsidian);
  --shadow-card-hover: 6px 6px 0 var(--color-primary);
  --shadow-deep-on-dark: 6px 6px 0 var(--color-primary);

  /* Motion */
  --ease-standard: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-decelerate: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-emphasize: cubic-bezier(0.2, 0.0, 0, 1);
  --motion-fast: 160ms;
  --motion-base: 240ms;
  --motion-slow: 400ms;

  /* Layout */
  --container-default: 1200px;
  --container-text: 880px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-on-surface);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* Typography primitives */
.eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  margin: 0 0 20px;
}
.eyebrow.on-dark { color: rgba(255,255,255,0.55); }
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--color-verification);
  margin-right: 10px;
  vertical-align: middle;
  transform: translateY(-1px);
}

h1, h2, h3, h4 {
  font-family: var(--font-headline);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0 0 16px;
}
.display {
  font-size: clamp(48px, 6.4vw, 88px);
  letter-spacing: -0.025em;
  font-weight: 500;
}
.h1 { font-size: clamp(40px, 4.8vw, 64px); }
.h2 { font-size: clamp(34px, 3.6vw, 52px); }
.h3 { font-size: clamp(24px, 2vw, 30px); line-height: 1.2; }
.h4 { font-family: var(--font-body); font-size: 20px; font-weight: 600; letter-spacing: -0.005em; line-height: 1.3; }

p { margin: 0 0 16px; }
.lead { font-size: 20px; line-height: 1.55; color: var(--color-on-surface); }
.lead.on-dark { color: rgba(255,255,255,0.78); }
.muted { color: var(--color-on-surface-variant); }
.muted.on-dark { color: rgba(255,255,255,0.6); }
.mono { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0; }
.quote-serif { font-family: var(--font-quote); font-style: italic; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-color: var(--color-verification); text-underline-offset: 4px; text-decoration-thickness: 2px; }

/* Container */
.container { max-width: var(--container-default); margin: 0 auto; padding: 0 32px; }
.container-text { max-width: var(--container-text); margin: 0 auto; padding: 0 32px; }

/* Section padding */
section { padding: 96px 0; position: relative; }
section.dark { background: var(--color-obsidian); color: #fff; }
section.dark .muted { color: rgba(255,255,255,0.6); }
section.tight { padding: 64px 0; }
section.tall { padding: 128px 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.005em;
  border: 1.5px solid var(--color-obsidian);
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  transition: transform var(--motion-fast) var(--ease-standard),
              box-shadow var(--motion-fast) var(--ease-standard),
              background var(--motion-fast) var(--ease-standard);
  box-shadow: var(--shadow-deep);
  cursor: pointer;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--color-obsidian);
  text-decoration: none;
  background: var(--color-primary-variant);
}
.btn:active { transform: translate(0, 0); box-shadow: 3px 3px 0 var(--color-obsidian); }
.btn .arrow { transition: transform var(--motion-fast) var(--ease-standard); }
.btn:hover .arrow { transform: translateX(3px); }

.btn.on-dark { border-color: var(--color-primary); box-shadow: 6px 6px 0 var(--color-primary); }
.btn.on-dark:hover { box-shadow: 8px 8px 0 var(--color-primary); }

.btn.secondary {
  background: transparent; color: var(--color-obsidian); border-color: var(--color-obsidian); box-shadow: none;
}
.btn.secondary.on-dark { color: #fff; border-color: #fff; }
.btn.secondary:hover { background: var(--color-obsidian); color: #fff; box-shadow: none; transform: none; }

.btn.ghost { background: transparent; border: none; color: var(--color-obsidian); padding: 8px 0; box-shadow: none; }
.btn.ghost:hover { background: transparent; box-shadow: none; transform: none; color: var(--color-primary); }
.btn.ghost.on-dark { color: #fff; }

/* Confidence badge — the brand glyph */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid currentColor;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: transparent;
}
.badge.verified { color: var(--color-verification); }
.badge.amber { color: var(--color-amber-truth); }
.badge.error { color: var(--color-error); }
.badge .score { font-family: var(--font-mono); font-weight: 400; text-transform: none; letter-spacing: 0; opacity: 0.85; }
.badge .glyph {
  display: inline-block; width: 12px; height: 12px;
}

/* Nav — v2 canonical (matches Homepage Desktop v2) */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(26, 26, 46, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav .brand { display: flex; align-items: center; gap: 10px; }
.nav .brand img { height: 24px; width: auto; }
.nav .menu { display: flex; align-items: center; gap: 28px; }
.nav .menu a {
  color: rgba(255,255,255,0.78); font-size: 14px; font-weight: 500;
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-standard);
}
.nav .menu a:hover { color: #fff; text-decoration: none; }
.nav .menu a.has-dropdown::after { content: " ▾"; font-size: 9px; opacity: 0.55; }
.nav-cta {
  background: var(--color-primary); color: #fff;
  padding: 9px 16px; font-size: 13px; font-weight: 600;
  text-decoration: none;
  transition: background var(--motion-fast) var(--ease-standard);
  border: none;
}
.nav-cta:hover { background: var(--color-primary-variant); color: #fff; text-decoration: none; }

/* Mega menu */
.nav-dropdown { position: relative; }
.nav-mega {
  position: absolute; top: calc(100% + 6px); left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: #fff; color: var(--color-obsidian);
  border: 1px solid var(--color-obsidian);
  box-shadow: var(--shadow-deep);
  min-width: 360px; padding: 14px;
  opacity: 0; pointer-events: none;
  transition: opacity 200ms var(--ease-standard),
              transform 200ms var(--ease-standard);
}
.nav-dropdown:hover .nav-mega,
.nav-dropdown:focus-within .nav-mega { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.nav-mega a {
  display: block; padding: 10px 12px; color: var(--color-obsidian); text-decoration: none;
  border-bottom: 1px solid var(--color-outline-variant);
  transition: background var(--motion-fast) var(--ease-standard);
}
.nav-mega a:last-child { border-bottom: none; }
.nav-mega a:hover { background: var(--color-surface); text-decoration: none; }
.nav-mega a strong { display: block; font-weight: 600; font-size: 14px; margin-bottom: 2px; }
.nav-mega a span { font-size: 12px; color: var(--color-on-surface-variant); }

/* Footer */
footer.site-footer {
  background: var(--color-obsidian); color: rgba(255,255,255,0.7);
  padding: 80px 0 40px;
}
footer.site-footer .grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 64px;
}
footer.site-footer h5 {
  font-family: var(--font-body); font-size: 12px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.55);
  margin: 0 0 20px;
}
footer.site-footer ul { list-style: none; padding: 0; margin: 0; }
footer.site-footer li { margin-bottom: 12px; }
footer.site-footer a { color: rgba(255,255,255,0.75); font-size: 14px; }
footer.site-footer a:hover { color: #fff; text-decoration: underline; text-decoration-color: var(--color-verification); }
footer.site-footer .brand img { height: 26px; margin-bottom: 16px; }
footer.site-footer .tagline { color: rgba(255,255,255,0.75); font-size: 15px; max-width: 280px; }
footer.site-footer .legal {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 32px;
  font-size: 13px; color: rgba(255,255,255,0.5);
}
footer.site-footer .socials { display: flex; gap: 16px; }
footer.site-footer .socials a { color: rgba(255,255,255,0.6); font-size: 13px; }

/* Card baseline */
.card {
  background: var(--color-gallery-white);
  border: 1.5px solid var(--color-obsidian);
  box-shadow: var(--shadow-deep);
  padding: 28px;
  transition: transform var(--motion-base) var(--ease-standard),
              box-shadow var(--motion-base) var(--ease-standard);
}
.card.hoverable:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--color-primary);
}
.card.on-dark { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.18); box-shadow: 6px 6px 0 var(--color-primary); color: #fff; }

/* Green underline accent */
.u-green {
  background-image: linear-gradient(to bottom, transparent 78%, var(--color-verification) 78%, var(--color-verification) 94%, transparent 94%);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  padding: 0 2px;
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms var(--ease-decelerate), transform 700ms var(--ease-decelerate); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(16px); transition: opacity 600ms var(--ease-decelerate), transform 600ms var(--ease-decelerate); }
.reveal-stagger.visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 400ms; }

/* Email capture inline */
.email-capture {
  display: flex; gap: 0;
  border: 1.5px solid var(--color-obsidian);
  background: #fff;
  box-shadow: var(--shadow-deep);
  max-width: 560px;
}
.email-capture.on-dark { border-color: #fff; box-shadow: 6px 6px 0 var(--color-primary); background: rgba(255,255,255,0.04); }
.email-capture input {
  flex: 1; padding: 16px 20px; border: none; outline: none; background: transparent;
  font-family: var(--font-body); font-size: 15px; color: var(--color-obsidian); min-width: 0;
}
.email-capture.on-dark input { color: #fff; }
.email-capture.on-dark input::placeholder { color: rgba(255,255,255,0.5); }
.email-capture button {
  padding: 0 26px; border: none; background: var(--color-primary); color: #fff;
  font-family: var(--font-body); font-size: 15px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
  border-left: 1.5px solid var(--color-obsidian);
  transition: background var(--motion-fast) var(--ease-standard);
}
.email-capture.on-dark button { border-left-color: #fff; }
.email-capture button:hover { background: var(--color-primary-variant); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
}