/* ============================================================
   Biomarkr — site-level styles (page chrome, layout, motion).
   Brand tokens come from the design system (_ds/.../styles.css).
   This file only adds page-scaffold concerns: nav, footer,
   reading rhythm, and the scroll-reveal motion.
   ============================================================ */

html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out);
}
* { box-sizing: border-box; }
::selection { background: var(--text-primary); color: var(--surface-page); }

a { color: inherit; }

/* --- Page width system --- */
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding-left: 8%; padding-right: 8%; }
.column { max-width: 880px; }

/* --- Floating nav --- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px;
  padding: 22px 8%;
  background: linear-gradient(to bottom, rgba(var(--mist-rgb),1) 0%, rgba(var(--mist-rgb),0.86) 55%, rgba(var(--mist-rgb),0) 100%);
}
.brandmark { height: 28px; width: auto; display: block; filter: invert(var(--logo-invert,0)); }
.navpill {
  display: flex; gap: 2px; align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-pill);
  padding: 5px;
}
.navlink {
  padding: 9px 22px; font-size: 13.5px; font-weight: 500;
  color: var(--text-secondary); text-decoration: none;
  border-radius: var(--radius-pill);
  transition: background-color .2s var(--ease-out), color .2s var(--ease-out);
  white-space: nowrap;
}
.navlink:hover { background: var(--surface-raised); color: var(--text-primary); }
.navlink.active { color: var(--text-primary); background: var(--surface-raised); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.mobile-toggle { display: none; }

@media (max-width: 940px) {
  .navpill.center { display: none; }
  .mobile-toggle { display: inline-flex; }
  .nav-email { display: none; }
}

/* mobile sheet */
.mobile-sheet {
  position: fixed; inset: 0; z-index: 200;
  background: var(--surface-page);
  display: flex; flex-direction: column; padding: 28px 8%;
  opacity: 0; pointer-events: none; transition: opacity .25s var(--ease-out);
}
.mobile-sheet.open { opacity: 1; pointer-events: auto; }
.mobile-sheet a {
  font-size: 28px; font-weight: 300; letter-spacing: -0.02em;
  color: var(--text-primary); text-decoration: none; padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
}

/* --- Eyebrow + rule lockup --- */
.eyebrow {
  font-size: 12px; font-weight: 600; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-tertiary);
}
.rule { display: block; width: 60px; height: 2px; background: var(--text-primary); border: 0; }

/* --- Body type helpers --- */
.lead { font-size: 21px; line-height: 1.55; font-weight: 300; letter-spacing: -0.01em; color: var(--text-primary); }
.prose { font-size: 16px; line-height: 1.85; color: var(--text-secondary); }
.prose p { margin: 0 0 1.1em; }
.prose strong { color: var(--text-primary); font-weight: 600; }
.serif { font-family: var(--font-serif); font-weight: 300; }
.tabular { font-variant-numeric: tabular-nums; }

/* --- Section divider --- */
.hairline-top { border-top: 1px solid var(--border-subtle); }

/* --- Footer --- */
.site-footer { background: var(--surface-inverse); color: var(--grey-250); padding: 88px 8% 40px; }
.site-footer h4 { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.14em; color: var(--white); margin: 0 0 16px; }
.site-footer a { color: var(--grey-350); text-decoration: none; font-size: 14px; display: block; padding: 5px 0; transition: color .2s var(--ease-out); }
.site-footer a:hover { color: var(--white); }
[data-theme="dark"] .site-footer { border-top: 1px solid var(--border-default); }

/* --- Buttons (link styled as DS button when not React) --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 500; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: opacity .2s var(--ease-out), background-color .2s var(--ease-out), border-color .2s var(--ease-out);
  white-space: nowrap;
}
.btn-primary { background: var(--text-primary); color: var(--surface-page); }
.btn-primary:hover { opacity: .82; }
.btn-ghost { background: transparent; color: var(--text-primary); border-color: var(--border-default); }
.btn-ghost:hover { background: var(--surface-raised); border-color: var(--border-strong); }

/* --- Scroll reveal --- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  html { scroll-behavior: auto; }
}

/* --- Theme variables that depend on mode --- */
:root { --nav-bg: rgba(255,255,255,0.55); }
[data-theme="dark"] { --nav-bg: rgba(20,20,20,0.5); }

/* --- Hero entrance (translate only — never hides content if animation is frozen) --- */
@keyframes heroRise { from { transform: translateY(40px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) { [style*="heroRise"] { animation: none !important; } }

/* ============================================================
   Responsive grid system
   Inline grid-template-columns were causing overflow + orphaned
   items on small screens. These classes collapse cleanly at
   tablet/mobile breakpoints. Apply via className (never inline
   grid-template-columns, which would override the media queries).
   ============================================================ */
.r-split { display: grid; grid-template-columns: 1fr 1fr; }
.r-hero  { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.05fr); }
.r-wide  { display: grid; grid-template-columns: 1.3fr 1fr; }
.r-cta   { display: grid; grid-template-columns: 1.2fr 1fr; }
.r-faq   { display: grid; grid-template-columns: 0.6fr 1.4fr; }
.r-2     { display: grid; grid-template-columns: 1fr 1fr; }
.r-3     { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); }
.r-4     { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); }
.r-cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); }

@media (max-width: 1024px) {
  .r-cards { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 980px) {
  .r-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 880px) {
  .r-split, .r-hero, .r-wide, .r-cta, .r-faq, .r-3 { grid-template-columns: 1fr; }
  .faq-sticky { position: static !important; top: auto !important; }
}
@media (max-width: 640px) {
  .r-cards { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .r-4 { grid-template-columns: 1fr; }
  .r-2 { grid-template-columns: 1fr; }
}

/* Media never overflows its column */
img, svg, table { max-width: 100%; }

/* ============================================================
   Scroll-spy section indicator (fixed dot rail, left edge)
   ============================================================ */
.scrollspy {
  position: fixed; left: 30px; top: 50%; transform: translateY(-50%);
  z-index: 90; display: flex; flex-direction: column; gap: 4px;
  transition: opacity .35s var(--ease-out);
}
.scrollspy-dot {
  display: flex; align-items: center; gap: 13px;
  background: none; border: 0; padding: 7px 0; cursor: pointer;
  color: var(--text-secondary);
}
.scrollspy-mark {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
  background: var(--text-tertiary); opacity: 0.5;
  transition: opacity .25s var(--ease-out), background-color .25s var(--ease-out), transform .25s var(--ease-out);
}
.scrollspy-label {
  font-size: 11px; font-weight: 400; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-tertiary); white-space: nowrap;
  opacity: 0; transform: translateX(-6px); pointer-events: none;
  transition: opacity .25s var(--ease-out), transform .25s var(--ease-out);
}
.scrollspy-dot:hover .scrollspy-mark { opacity: 0.85; }
.scrollspy-dot:hover .scrollspy-label { opacity: 1; transform: none; }
.scrollspy-dot.active .scrollspy-mark {
  background: var(--text-secondary); opacity: 1; transform: scale(1.25);
}
.scrollspy-dot.active .scrollspy-label { opacity: 1; transform: none; color: var(--text-secondary); }
@media (max-width: 1180px) { .scrollspy { left: 16px; } }
@media (max-width: 980px) { .scrollspy { display: none; } }

/* ============================================================
   Contact modal (Get in touch)
   ============================================================ */
.contact-overlay {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center; padding: 24px;
  background: rgba(10,10,10,0.42);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  animation: contactFade .2s var(--ease-out);
}
@keyframes contactFade { from { opacity: 0; } to { opacity: 1; } }
.contact-card {
  position: relative; width: 100%; max-width: 440px;
  background: var(--surface-page); color: var(--text-primary);
  border: 1px solid var(--border-default); border-radius: 16px;
  padding: 38px 34px 30px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.22);
  animation: contactRise .28s var(--ease-out);
}
@keyframes contactRise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.contact-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border-default); background: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: background-color .2s var(--ease-out), border-color .2s var(--ease-out), color .2s var(--ease-out);
}
.contact-close:hover { background: var(--surface-raised); border-color: var(--border-strong); color: var(--text-primary); }
.contact-close svg { width: 18px; height: 18px; }
.contact-title { margin: 0; font-size: 26px; font-weight: 300; letter-spacing: -0.02em; }
.contact-sub { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: var(--text-secondary); max-width: 330px; }
.contact-rows { margin-top: 26px; display: flex; flex-direction: column; gap: 4px; }
.contact-row {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 12px; margin: 0 -12px; border-radius: 12px;
  text-decoration: none; color: inherit;
  transition: background-color .2s var(--ease-out);
}
.contact-row:hover { background: var(--surface-raised); }
.contact-ic {
  flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-default); color: var(--text-primary);
}
.contact-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.contact-label {
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-tertiary);
}
.contact-value { font-size: 15px; color: var(--text-primary); line-height: 1.4; }

/* Mobile polish */
@media (max-width: 700px) {
  .lead { font-size: 18px; }
  .wrap { padding-left: 6.5%; padding-right: 6.5%; }
  .site-header { padding: 16px 6.5%; }
  .site-footer { padding: 64px 6.5% 36px; }
}

/* --- Misc --- */
.pill-tag {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
  padding: 6px 13px; border-radius: var(--radius-pill);
  border: 1px solid var(--border-default); color: var(--text-secondary);
  font-family: var(--font-mono);
}
.dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }