/* InferAPI — fiducial lock / calibration plate. 2026-08-24 */
/* data-redesign="fiducial-lock-20260824" */
:root {
  --plate: #e8eef2;
  --plate-2: #d5dee6;
  --ink: #12171c;
  --mute: #5a6570;
  --cyan: #0a9bb8;
  --amber: #d97706;
  --void: #0b1014;
  --paper: #f4f7f9;
  --rule: #c5d0d8;
  --max: 1120px;
  --sans: "Avenir Next", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
::selection { background: rgba(10, 155, 184, 0.28); color: var(--ink); }

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(10, 155, 184, 0.06), transparent 28%),
    var(--plate);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.6;
}

h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.15; }
h1 { margin: 0 0 1rem; }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.05rem); margin: 0 0 0.7rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }
code { font-family: var(--mono); font-size: 0.9em; }
button { font-family: inherit; }

a { color: var(--ink); }
a:hover { color: var(--cyan); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.wrap { width: min(var(--max), calc(100% - 4.5rem)); margin: 0 auto; }

.plate-marks {
  pointer-events: none;
  position: fixed;
  inset: 10px;
  z-index: 40;
  border: 1px solid rgba(18, 23, 28, 0.12);
}
.plate-marks::before,
.plate-marks::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--ink);
}
.plate-marks::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.plate-marks::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
  background: rgba(232, 238, 242, 0.92);
  backdrop-filter: blur(10px);
}
.site-header.is-scrolled { box-shadow: 0 1px 0 var(--rule); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.4rem;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.03em;
  font-size: 1.12rem;
}
.wordmark svg { width: 26px; height: 26px; display: block; }

.nav-toggle {
  display: none;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 8px;
  padding: 0.32rem 0.65rem;
  font-size: 0.8rem;
  cursor: pointer;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
}
.nav-list a { text-decoration: none; color: var(--mute); }
.nav-list a:hover,
.nav-list a[aria-current="page"] { color: var(--ink); }

.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--paper) !important;
  text-decoration: none;
  padding: 0.52rem 0.95rem;
  border-radius: 8px;
  border: 1px solid var(--ink);
  font-size: 0.88rem;
  cursor: pointer;
  transition: filter 0.28s var(--ease), background 0.28s var(--ease), color 0.28s var(--ease);
}
.btn:hover { filter: brightness(1.14); }
.btn-ghost {
  background: transparent;
  color: var(--ink) !important;
}
.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper) !important;
}
.nav-list .btn { color: var(--paper) !important; }

.hero {
  padding: 4.4rem 0 3rem;
  display: grid;
  grid-template-columns: 1.02fr 1.08fr;
  gap: 2.6rem;
  align-items: end;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.9rem;
}
.lock-dot {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  display: inline-block;
  animation: pulse 1.8s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero h1 {
  font-size: clamp(2.15rem, 4.4vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
  font-weight: 600;
  max-width: 18ch;
}
.lede { max-width: 36rem; color: #3a444c; margin: 0 0 1.5rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }

.hero-art {
  margin: 0;
  background: var(--plate-2);
  border: 1px solid var(--ink);
  border-radius: 8px;
  overflow: hidden;
}
.hero-art svg { width: 100%; height: auto; display: block; }

.bbox,
.bbox {
  stroke-dasharray: 280;
  stroke-dashoffset: 280;
  animation: draw 1.1s var(--ease) forwards;
}
.bbox-b, .bbox-b { animation-delay: 0.25s; }
.bbox-c, .bbox-c { animation-delay: 0.45s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.scan {
  transform-box: fill-box;
  transform-origin: top;
  animation: sweep 2.8s ease-in-out infinite;
}
@keyframes sweep {
  0% { transform: translateY(0); }
  100% { transform: translateY(250px); }
}

.sdk-row { padding: 0.5rem 0 3rem; }
.sdk-row p, .code-head p { color: var(--mute); max-width: 42rem; }
.sdk-logos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}
.sdk-logos li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  font-family: var(--mono);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}
.sdk-logos li:hover { border-color: var(--cyan); transform: translateY(-2px); }
.sdk-logos svg { width: 48px; height: 32px; }

.code-sec { padding: 0 0 3.2rem; }
.code-frame {
  border-radius: 8px;
  overflow: hidden;
  background: var(--void);
  color: #e6edf2;
  border: 1px solid #1c252c;
}
.code-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: #7a8790;
  border-bottom: 1px solid #1c252c;
}
.code-meta .hud { color: var(--cyan); }
pre {
  margin: 0;
  padding: 1.15rem 1.2rem 1.35rem;
  overflow: auto;
  font: 13px/1.55 var(--mono);
}
.k { color: #7dd3e8; }
.s { color: #f0c674; }
.n { color: #e8a87c; }

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: start;
  padding: 0 0 3.2rem;
}
.json-out {
  background: var(--void);
  color: #e6edf2;
  border-radius: 8px;
  margin-top: 1rem;
}
.mini-art { margin: 0; border-radius: 8px; overflow: hidden; border: 1px solid var(--ink); }
.mini-art svg { width: 100%; height: auto; display: block; }

.langs { padding: 0 0 3rem; }
.lang-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
  margin-top: 1.2rem;
}
.lang-grid figure {
  margin: 0;
  padding: 1rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
}
.lang-grid figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}
.lang-grid p { margin: 0; font-size: 0.92rem; }

.tools {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  padding: 0 0 3.2rem;
}
.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.2rem 1.3rem 1.4rem;
}
.card svg { width: 100%; height: auto; display: block; margin-bottom: 0.8rem; }
.card p { color: #3a444c; }

.arch { padding: 0 0 3rem; }
.arch p, .cta p { color: #3a444c; max-width: 42rem; }
.arch-art {
  margin: 1.3rem 0 0;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1rem;
}
.arch-art svg { width: 100%; height: auto; display: block; }

.specs { padding: 0 0 3rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  text-align: left;
  padding: 0.72rem 1rem;
  border-bottom: 1px solid var(--rule);
}
tbody th { font-weight: 550; width: 34%; }
thead th { background: var(--ink); color: var(--paper); font-weight: 550; }

.cta {
  padding: 2.4rem 0 4.4rem;
  text-align: center;
}
.cta h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); }
.cta p { margin-left: auto; margin-right: auto; }
.cta .actions { justify-content: center; }

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2.2rem 0 2.6rem;
  font-size: 0.86rem;
  color: var(--mute);
  background: #dfe7ed;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 1.4rem;
}
.site-footer a { color: var(--mute); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }
.site-footer strong { display: block; color: var(--ink); margin-bottom: 0.4rem; }
.site-footer p { margin: 0.2rem 0; }

.page { padding: 3.2rem 0 4.6rem; }
.page h1 { font-size: clamp(2rem, 4vw, 2.8rem); max-width: 18ch; }
.page h2 { margin-top: 2rem; }
.page > p { max-width: 44rem; }
.page .lede { margin-bottom: 1.8rem; max-width: 44rem; }
.doc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.4rem 0 2rem;
}
.endpoint {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--void);
  color: #c9d4dc;
  padding: 0.7rem 1rem;
  border-radius: 8px;
}
.endpoint b { color: var(--cyan); font-weight: 500; }

form {
  display: grid;
  gap: 0.45rem;
  max-width: 28rem;
}
label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--mono);
  color: var(--mute);
  margin-top: 0.45rem;
}
input, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--rule);
  background: #fff;
  font: inherit;
  border-radius: 8px;
}
input:focus, textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: 1px;
}
.tabs {
  display: flex;
  gap: 0.4rem;
  margin: 1rem 0 0;
}
.tabs button {
  font-size: 0.82rem;
  font-family: var(--mono);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
.tabs button[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.panel[hidden] { display: none; }

.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bbox, .bbox, .scan, .lock-dot, .reveal { animation: none; transition: none; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 800px) {
  .wrap { width: min(var(--max), calc(100% - 1.5rem)); }
  .plate-marks { display: none; }
  .nav-toggle { display: inline-block; }
  .header-inner { flex-wrap: wrap; }
  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.4rem 0 0.6rem;
  }
  .nav-list.is-open { display: flex; }
  .hero,
  .split,
  .tools,
  .doc-grid,
  .foot-grid,
  .sdk-logos,
  .lang-grid {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 2.4rem; }
  .hero h1 { max-width: none; }
}