/* Biomechanix site — brand from biomechanix.ai: black canvas, lime #CCFF00
   accent with glow, cyan #00D4FF secondary; Space Grotesk / Inter / JetBrains Mono.
   Dark-only, matching biomechanix.ai. */
:root {
  color-scheme: dark;
  --bg: #000000;
  --bg2: #0A0A0A;
  --card: #0F0F0F;           /* hsl(0 0% 6%) */
  --ink: #FFFFFF;
  --ink2: rgba(255,255,255,.88);
  --ink3: rgba(255,255,255,.66);
  --muted: #A6A6A6;          /* hsl(0 0% 65%) */
  --line: rgba(255,255,255,.10);
  --line-strong: #2E2E2E;    /* hsl(0 0% 18%) */
  --lime: #CCFF00;           /* primary — hsl(72 100% 50%) */
  --lime-hover: #D9FF52;
  --cyan: #00D4FF;
  --tint-lime: rgba(204,255,0,.10);
  --tint-cyan: rgba(0,212,255,.10);
  --tint-white: rgba(255,255,255,.06);
  --link: #CCFF00;
  --glow: 0 0 15px rgba(163,230,53,.5);
  --radius: 16px;
  --radius-sm: 12px;
  --max: 1120px;
  --display: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink2);
  font: 16px/1.6 var(--body);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--lime); outline-offset: 3px; border-radius: 6px; }

h1, h2, h3 { font-family: var(--display); color: var(--ink); margin: 0 0 .5em; }
h1 { font-size: clamp(2.3rem, 5.5vw, 4.2rem); line-height: 1.04; letter-spacing: -0.03em; font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.1; letter-spacing: -0.025em; font-weight: 700; }
h3 { font-size: 1.3rem; line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0 0 1em; }
.lede { font-size: 1.15rem; color: var(--ink3); max-width: 38em; }
.eyebrow {
  font: 500 .72rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 1rem; display: inline-block;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--card); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 5; background: rgba(0,0,0,.8); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; font: 700 1.2rem/1 var(--display); color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
/* Logo: lime square + black "B" with glow — same mark as the biomechanix.ai header/favicon */
.brand-mark {
  width: 40px; height: 40px; flex: none; border-radius: 6px;
  box-shadow: var(--glow), 0 0 22px rgba(204,255,0,.35);
}
.nav { display: flex; gap: 4px 18px; flex-wrap: wrap; font-size: .95rem; }
.nav a { color: var(--ink3); text-decoration: none; padding: 6px 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--lime); }

/* Hero */
.hero { position: relative; padding: 72px 0 56px; overflow: hidden; }
.hero::before { /* lime + cyan atmospheric glow, as on biomechanix.ai */
  content: ""; position: absolute; inset: -30% -10% auto 30%; height: 560px;
  background: radial-gradient(closest-side, rgba(204,255,0,.14), transparent 70%),
              radial-gradient(closest-side at 25% 70%, rgba(0,212,255,.10), transparent 70%);
  pointer-events: none; z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { max-width: 14em; }
.hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.2fr .8fr; } }

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 46px; padding: 0 22px;
  border-radius: 8px; font: 600 .95rem/1 var(--body); text-decoration: none; letter-spacing: -0.01em;
  border: 1px solid var(--line-strong); color: var(--ink); background: var(--card);
}
.btn-primary { background: var(--lime); color: #000; border: 0; box-shadow: var(--glow); }
.btn-primary:hover { background: var(--lime-hover); }
.btn:hover { border-color: rgba(204,255,0,.4); }

/* Sections */
section { padding: 56px 0; }
.section-alt { background: var(--bg2); }
.section-head { max-width: 40em; margin-bottom: 32px; }

/* Cards */
.grid { display: grid; gap: 16px; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; display: flex; flex-direction: column; transition: border-color .2s;
}
.card:hover { border-color: rgba(204,255,0,.3); }
.card p:last-child { margin-bottom: 0; }
.card .more { margin-top: auto; padding-top: 16px; font-weight: 600; text-decoration: none; }
.card .more::after { content: " →"; }
.card-dark { background: linear-gradient(135deg, rgba(204,255,0,.10), rgba(0,212,255,.06)); border-color: rgba(204,255,0,.30); }
.card-dark .eyebrow { color: var(--lime); }
.product-card .tag {
  align-self: flex-start; font: 500 .7rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  padding: 7px 10px; border-radius: 999px; margin-bottom: 18px; color: var(--ink2);
}
.product-card .tag-blue { background: var(--tint-lime); color: var(--lime); border: 1px solid rgba(204,255,0,.3); }
.product-card .tag-teal { background: var(--tint-cyan); color: var(--cyan); border: 1px solid rgba(0,212,255,.3); }
.product-card .tag-amber { background: var(--tint-white); border: 1px solid var(--line-strong); }
.product-card ul { padding-left: 1.1em; margin: 0 0 8px; color: var(--ink3); }
.product-card li { margin: 4px 0; }

.feature h3 { font-size: 1.1rem; }
.feature p { color: var(--ink3); font-size: .97rem; }
.feature .n { font: 500 .75rem/1 var(--mono); color: var(--lime); letter-spacing: .1em; display: block; margin-bottom: 14px; }

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); } }
.steps li { counter-increment: step; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 20px; }
.steps li::before { content: counter(step, decimal-leading-zero); font: 500 .75rem/1 var(--mono); color: var(--lime); display: block; margin-bottom: 12px; letter-spacing: .1em; }
.steps strong { display: block; font-family: var(--display); color: var(--ink); font-size: 1.05rem; margin-bottom: 4px; }
.steps span { color: var(--ink3); font-size: .95rem; }

/* Phone shots — lock the 506x900 source ratio so no layout engine can
   stretch them (flex/grid stretch, stale height attributes, etc.). */
.shots img, .hero-phone { aspect-ratio: 506 / 900; height: auto; object-fit: contain; }
.shots { display: flex; gap: 16px; overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x mandatory; }
.shots img { width: 220px; flex: none; align-self: flex-start; border-radius: 26px; border: 1px solid var(--line-strong); scroll-snap-align: start; background: var(--card); }
.hero-phone { justify-self: center; align-self: center; width: min(300px, 80%); border-radius: 34px; border: 1px solid var(--line-strong); box-shadow: 0 0 60px -10px rgba(204,255,0,.25); }

/* Callout */
.callout { border-left: 3px solid var(--lime); background: var(--card); padding: 18px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--ink3); }
.callout strong { color: var(--ink); }
.callout-amber { border-left-color: var(--cyan); }

/* Prose pages (privacy, support, delete) */
.prose { max-width: 720px; padding: 48px 0 24px; }
.prose h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); }
.prose h2 { font-size: 1.45rem; margin-top: 2em; }
.prose h3 { font-size: 1.1rem; margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li { margin: 6px 0; }
.prose .meta { color: var(--muted); font-size: .95rem; }
.table-wrap { overflow-x: auto; margin: 0 0 1em; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 500 .72rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
details { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0 18px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; color: var(--ink); padding: 16px 0; list-style-position: outside; }
details[open] summary { border-bottom: 1px solid var(--line); margin-bottom: 12px; }
details > p, details > ul { color: var(--ink3); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 56px; margin-top: 40px; font-size: .92rem; color: var(--muted); }
.site-footer .wrap { display: grid; gap: 24px; }
@media (min-width: 720px) { .site-footer .wrap { grid-template-columns: 2fr 1fr 1fr; } }
.site-footer h4 { font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink3); margin: 0 0 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: var(--ink3); text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }

/* Platform + company sections */
.built-on { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 24px; }
.built-on ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
@media (min-width: 720px) { .built-on ul { grid-template-columns: repeat(3, 1fr); } }
.built-on li { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--card); }
.built-on a, .built-on b { font: 600 1rem/1.3 var(--display); color: var(--ink); text-decoration: none; }
.built-on a:hover { color: var(--lime); }
.built-on span { font-size: .88rem; color: var(--muted); }
.company { gap: 40px; align-items: start; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; margin: 24px 0 4px; }
.facts div { border-top: 1px solid rgba(204,255,0,.4); padding-top: 12px; }
.facts b { display: block; font: 700 1.1rem/1.2 var(--display); color: var(--ink); }
.facts span { font-size: .88rem; color: var(--muted); }
.values .steps { grid-template-columns: 1fr; }
section[id] { scroll-margin-top: 72px; }
.site-footer .brand { color: var(--ink); }

/* Applications page */
.tag {
  display: inline-block; font: 500 .7rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  padding: 7px 10px; border-radius: 999px; margin-bottom: 16px; color: var(--ink2);
}
.tag-lime { background: var(--tint-lime); color: var(--lime); border: 1px solid rgba(204,255,0,.3); }
.tag-cyan { background: var(--tint-cyan); color: var(--cyan); border: 1px solid rgba(0,212,255,.3); }
.tag-white { background: var(--tint-white); border: 1px solid var(--line-strong); }
.app-list { padding-top: 16px; }
.app-row { display: grid; gap: 28px; padding: 36px 0; border-top: 1px solid var(--line); }
.app-row:first-child { border-top: 0; padding-top: 0; }
@media (min-width: 900px) { .app-row { grid-template-columns: 1.1fr .9fr; align-items: start; } }
.app-row h2 { margin-bottom: .35em; }
.app-points { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.app-points li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; color: var(--ink3); font-size: .95rem; }
.app-points b { display: block; font: 500 .7rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--lime); margin-bottom: 6px; }
.compare { min-width: 640px; }
.compare th[scope="row"] { color: var(--ink); font: 600 .9rem/1.4 var(--body); text-transform: none; letter-spacing: 0; white-space: nowrap; }
.compare thead th { color: var(--ink); font: 600 .95rem/1.3 var(--display); text-transform: none; letter-spacing: 0; }
.compare td { color: var(--ink3); }
.crumb { font: 500 .72rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); text-decoration: none; display: inline-block; margin-bottom: 14px; }
.crumb:hover { color: var(--lime); }
.crumb::before { content: "← "; }

/* Company page — team */
.person .avatar {
  width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 18px;
  background: var(--tint-lime); border: 1px solid rgba(204,255,0,.35); color: var(--lime);
  font: 700 1.1rem/1 var(--display); letter-spacing: .02em;
}
.person h3 { margin-bottom: 4px; }
.person .role { font: 500 .75rem/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); margin-bottom: 16px; }
.person p:not(.role) { color: var(--ink3); }