/* BlackGrid Labs — public site.
 * Mirrors the axismeridi.com/blackgrid dark-page design:
 *   warm-black bg (#0a0a0a) · parchment-white text (#f4f3ee) ·
 *   Helvetica Neue (light 300 headlines, 500 labels) · SF Mono for data/meta.
 *   Status amber #d4a155 / green #5fb486 / red #d97a7a. */

:root {
  --bg:           #0a0a0a;
  --ink:          #f4f3ee;
  --ink-soft:     #bcb8af;
  --ink-body:     #c0bdb6;
  --muted:        #a3a09a;
  --muted-2:      #888884;
  --rule:         #262626;
  --rule-soft:    rgba(255,255,255,0.04);
  --surface:      rgba(255,255,255,0.025);
  --amber:        #d4a155;
  --green:        #5fb486;
  --red:          #d97a7a;
  --sans: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;
  --maxw: 1200px;
  --pad-x: 32px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: var(--ink); color: var(--bg); }

/* ─── Layout ───────────────────────────────────────────────── */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
@media (max-width: 720px) { :root { --pad-x: 22px; } }

/* ─── Header ───────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,10,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: inline-flex; align-items: baseline; gap: 8px;
  font-family: var(--sans);
  color: var(--ink);
  letter-spacing: -0.008em;
}
.brand-name { font-size: 16px; font-weight: 500; }
.brand-mark { font-family: var(--mono); font-size: 11px; color: var(--muted-2); letter-spacing: 0.18em; }

.nav { display: flex; gap: 28px; align-items: center; }
.nav-link {
  font-family: var(--sans);
  font-size: 13px; font-weight: 400;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav-link:hover { color: var(--ink); }
.nav-link.active { color: var(--ink); border-bottom-color: var(--ink); }

@media (max-width: 720px) {
  .nav .nav-link { display: none; }
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
  font-family: var(--sans);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  font-size: 14px;
  letter-spacing: 0.005em;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s, color 0.18s, border-color 0.18s;
}
.btn-arrow { font-size: 13px; transition: transform 0.18s; }
.btn:hover .btn-arrow { transform: translateX(3px); }
.btn-primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn-primary:hover { background: #e8e6df; border-color: #e8e6df; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: #303030;
}
.btn-ghost:hover { border-color: var(--ink); }
.btn-sm { padding: 9px 16px; font-size: 13px; }

/* ─── Eyebrow / labels ─────────────────────────────────────── */
.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted);
  margin: 0;
}
.eyebrow-line {
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow-line::before {
  content: '';
  width: 28px; height: 1px;
  background: var(--muted);
}

/* ─── Page head ────────────────────────────────────────────── */
.page-head {
  padding: 88px 0 56px;
  max-width: 880px;
}
.page-headline {
  font-family: var(--sans);
  font-size: clamp(44px, 6vw, 84px);
  line-height: 1.0;
  font-weight: 300;
  letter-spacing: -0.032em;
  color: var(--ink);
  margin: 18px 0 28px;
}
.page-headline em { font-style: italic; font-weight: 300; }
.page-sub {
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  font-weight: 400;
  max-width: 660px;
  margin: 0 0 36px;
}
.page-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── Lab status strip ─────────────────────────────────────── */
.lab-strip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  padding: 18px 24px;
  margin: 48px 0 0;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--rule);
  align-items: center;
}
@media (max-width: 720px) { .lab-strip { grid-template-columns: 1fr; gap: 14px; } }
.lab-strip-active {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--amber); font-weight: 500; white-space: nowrap;
}
.lab-strip-active::before {
  content: '';
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(212,161,85,0.55);
  animation: labPulse 2.6s ease-in-out infinite;
}
@keyframes labPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(212,161,85,0.55); }
  60%      { box-shadow: 0 0 0 7px rgba(212,161,85,0); }
}
.lab-strip-stats { display: flex; flex-wrap: wrap; gap: 22px; align-items: baseline; }
.lab-strip-stat {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.lab-strip-stat-key {
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 9px;
  margin-right: 6px;
  font-weight: 500;
  font-family: var(--sans);
}
.lab-strip-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted-2);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  text-align: right;
  white-space: nowrap;
}

/* ─── Sections inside the page ─────────────────────────────── */
.lab-section { margin-top: 80px; padding: 0 0 88px; }
.lab-section:first-of-type { margin-top: 56px; }
.lab-section-head {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 36px;
  gap: 24px; flex-wrap: wrap;
}
.lab-section-headline {
  font-family: var(--sans);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  letter-spacing: -0.024em;
  color: var(--ink);
  margin: 0; line-height: 1.05;
}
.lab-section-headline em { font-style: italic; }
.lab-section-meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted-2);
  text-transform: uppercase;
  font-weight: 500;
}

/* ─── Track (research) — 3 col grid ────────────────────────── */
.track-x {
  display: grid;
  grid-template-columns: 110px 1.1fr 1fr;
  gap: 40px;
  padding: 38px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.track-x:last-of-type { border-bottom: none; }
@media (max-width: 980px) { .track-x { grid-template-columns: 1fr; gap: 22px; padding: 28px 0; } }
.track-x-id {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  padding-top: 4px;
}
.track-x-id-num {
  display: block;
  color: var(--ink);
  font-size: 22px;
  font-weight: 300;
  font-family: var(--sans);
  letter-spacing: -0.012em;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.track-x-name {
  font-family: var(--sans);
  font-size: 21px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  line-height: 1.2;
}
.track-x-detail + .track-x-detail { margin-top: 16px; }
.track-x-detail-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  margin-bottom: 6px;
  display: block;
}
.track-x-detail-text {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-body);
  margin: 0;
}
.track-x-detail-text strong { color: var(--ink); font-weight: 500; }

/* ─── Lab artifact (data block) ────────────────────────────── */
.lab-artifact {
  background: var(--surface);
  border: 1px solid var(--rule);
  margin-top: 4px;
}
.lab-artifact-head {
  display: flex; justify-content: space-between;
  padding: 11px 14px;
  border-bottom: 1px solid var(--rule);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  font-family: var(--sans);
}
.lab-artifact-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  padding: 7px 14px;
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid var(--rule-soft);
}
.lab-artifact-row:last-of-type { border-bottom: none; }
.lab-artifact-row-key { color: var(--ink-body); }
.lab-artifact-row-val { color: var(--ink); text-align: right; }
.lab-artifact-row-tag {
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  text-align: right;
  white-space: nowrap;
}
.lab-artifact-row-tag--good { color: var(--green); }
.lab-artifact-row-tag--warn { color: var(--amber); }
.lab-artifact-row-tag--fail { color: var(--red); }
.lab-artifact-foot {
  padding: 11px 14px;
  border-top: 1px solid var(--rule);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  font-family: var(--sans);
  display: flex;
  justify-content: space-between;
  gap: 14px;
}
.lab-artifact-foot strong { color: var(--ink); font-weight: 500; }

/* ─── Lab notes (timeline) ─────────────────────────────────── */
.lab-log { list-style: none; margin: 12px 0 0; padding: 0; }
.lab-log-entry {
  display: grid;
  grid-template-columns: 130px 1fr 110px;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.lab-log-entry:last-child { border-bottom: none; }
@media (max-width: 720px) { .lab-log-entry { grid-template-columns: 1fr; gap: 6px; } }
.lab-log-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted-2);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.lab-log-text {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-body);
  margin: 0;
}
.lab-log-text strong { color: var(--ink); font-weight: 500; }
.lab-log-tag {
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  white-space: nowrap;
  text-align: right;
}

/* ─── Papers ───────────────────────────────────────────────── */
.papers { list-style: none; margin: 12px 0 0; padding: 0; }
.paper {
  display: grid;
  grid-template-columns: 60px 1fr 160px;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.paper:last-child { border-bottom: none; }
@media (max-width: 720px) { .paper { grid-template-columns: auto 1fr; gap: 14px; } .paper-status { grid-column: 1 / -1; padding-top: 4px; } }
.paper-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted-2);
  letter-spacing: 0.04em;
}
.paper-title {
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin: 0 0 4px;
  line-height: 1.35;
}
.paper-meta {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted-2);
  margin: 0;
  letter-spacing: 0.02em;
}
.paper-status {
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  white-space: nowrap;
  text-align: right;
}
.paper-status--draft { color: var(--amber); }
.paper-status--public { color: var(--green); }

/* ─── Prose (About) ────────────────────────────────────────── */
.prose { max-width: 720px; font-family: var(--sans); font-size: 16.5px; line-height: 1.7; color: var(--ink-soft); }
.prose p { margin: 0 0 22px 0; }
.prose p strong { color: var(--ink); font-weight: 500; }
.prose h3 { font-family: var(--sans); color: var(--ink); font-size: 22px; font-weight: 500; margin: 40px 0 14px 0; letter-spacing: -0.012em; }
.prose ul { padding-left: 22px; margin: 0 0 22px; }
.prose li { margin-bottom: 10px; }
.prose li strong { color: var(--ink); font-weight: 500; }
.prose em { font-style: italic; }

/* ─── Pillars (home) ───────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  margin-top: 36px;
}
.pillar {
  padding: 36px 32px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.pillar:nth-child(3n) { border-right: none; }
@media (max-width: 980px) {
  .pillars { grid-template-columns: 1fr; }
  .pillar { border-right: none; }
}
.pillar-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  margin-bottom: 18px;
}
.pillar-num b { color: var(--ink); font-weight: 500; }
.pillar-name { font-family: var(--sans); font-size: 20px; font-weight: 500; letter-spacing: -0.014em; color: var(--ink); margin: 0 0 12px 0; }
.pillar-text { font-family: var(--sans); font-size: 14.5px; line-height: 1.6; color: var(--ink-body); margin: 0 0 20px; }
.pillar-link {
  font-family: var(--sans);
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
  transition: color 0.15s;
}
.pillar-link:hover { color: var(--ink); }

/* ─── Services grid ────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--rule);
  margin-top: 36px;
}
.service {
  padding: 36px 32px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex; flex-direction: column;
}
.service:nth-child(2n) { border-right: none; }
@media (max-width: 980px) {
  .services-grid { grid-template-columns: 1fr; }
  .service { border-right: none; }
}
.service-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--muted-2);
  font-weight: 500;
  margin-bottom: 16px;
}
.service-name { font-family: var(--sans); font-size: 22px; font-weight: 500; letter-spacing: -0.014em; color: var(--ink); margin: 0 0 8px 0; }
.service-tag {
  font-family: var(--sans); font-size: 9px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--muted-2); font-weight: 500;
  margin-bottom: 18px;
}
.service-text { font-family: var(--sans); font-size: 14.5px; line-height: 1.6; color: var(--ink-body); margin: 0 0 22px; flex: 1; }
.service-stat {
  display: flex; gap: 22px; flex-wrap: wrap;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px;
  color: var(--muted-2);
  font-variant-numeric: tabular-nums;
}
.service-stat strong { color: var(--ink); font-weight: 500; }

/* ─── Principles (About) ───────────────────────────────────── */
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  margin-top: 40px;
}
.principle {
  padding: 32px 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.principle:nth-child(3n) { border-right: none; }
@media (max-width: 980px) {
  .principle-grid { grid-template-columns: 1fr; }
  .principle { border-right: none; }
}
.principle-num {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.22em; color: var(--muted-2); font-weight: 500;
  margin-bottom: 14px;
}
.principle-name { font-family: var(--sans); font-size: 19px; font-weight: 500; letter-spacing: -0.014em; color: var(--ink); margin: 0 0 10px 0; }
.principle-text { font-family: var(--sans); font-size: 14px; line-height: 1.6; color: var(--ink-body); margin: 0; }

/* ─── Contact form ─────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  margin-top: 8px;
}
@media (max-width: 980px) { .contact-layout { grid-template-columns: 1fr; gap: 40px; } }
.contact-info { font-family: var(--sans); color: var(--ink-soft); font-size: 14.5px; line-height: 1.7; }
.contact-info h3 {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 500;
  margin: 32px 0 8px 0;
}
.contact-info h3:first-child { margin-top: 0; }
.contact-info a { color: var(--ink); border-bottom: 1px solid var(--rule); padding-bottom: 1px; }
.contact-info a:hover { border-bottom-color: var(--ink); }
.contact-info p { margin: 0 0 8px; }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field-label {
  font-family: var(--sans); font-size: 10px;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
}
.field-input, .field-textarea {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  padding: 12px 14px;
  font-size: 15px; font-family: var(--sans);
  width: 100%;
  transition: border-color 0.18s;
}
.field-input:focus, .field-textarea:focus { outline: none; border-color: var(--ink); }
.field-textarea { min-height: 160px; resize: vertical; line-height: 1.55; }
.field-input--err, .field-textarea--err { border-color: var(--red); }
.notice {
  padding: 14px 18px;
  font-family: var(--sans); font-size: 13px;
  background: rgba(95,180,134,0.06);
  border: 1px solid rgba(95,180,134,0.3);
  color: var(--green);
  margin-bottom: 24px;
}
.notice-error {
  background: rgba(217,122,122,0.06);
  border-color: rgba(217,122,122,0.3);
  color: var(--red);
}

.blackgrid-foot {
  margin-top: 56px;
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: 16px;
  font-family: var(--sans); font-size: 13px;
  color: var(--muted);
}
.blackgrid-foot-link {
  border-bottom: 1px solid var(--rule); padding-bottom: 2px;
  color: var(--ink); font-weight: 500; font-size: 13px;
  letter-spacing: 0.02em;
}
.blackgrid-foot-link:hover { border-bottom-color: var(--ink); }

/* ─── End CTA ──────────────────────────────────────────────── */
.end-cta {
  padding: 110px 0 120px;
  border-top: 1px solid var(--rule);
}
@media (max-width: 980px) { .end-cta { padding: 80px 0 90px; } }
.end-cta-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: end;
}
@media (max-width: 980px) { .end-cta-grid { grid-template-columns: 1fr; gap: 32px; } }
.end-cta-headline {
  font-family: var(--sans);
  font-size: clamp(40px, 5.6vw, 78px);
  line-height: 0.98;
  font-weight: 300;
  letter-spacing: -0.032em;
  color: var(--ink);
  margin: 16px 0 0;
}
.end-cta-sub {
  font-family: var(--sans);
  font-size: 17px; line-height: 1.55;
  color: var(--ink-soft);
  max-width: 480px;
  margin: 0 0 28px;
}
.end-cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 56px 0 32px 0;
  font-family: var(--sans);
  font-size: 13px; color: var(--muted-2);
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
.footer-col h4 {
  font-family: var(--sans);
  font-size: 10px; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--muted-2); font-weight: 500; margin: 0 0 14px 0;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  font-family: var(--sans);
  color: var(--ink-soft); font-size: 14px;
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--ink); }
.footer-tag {
  font-family: var(--sans); font-size: 14px; line-height: 1.6;
  color: var(--ink-soft); margin: 0 0 12px 0;
  max-width: 360px;
}
.footer-tag b { color: var(--ink); font-weight: 500; }
.footer-bottom {
  border-top: 1px solid var(--rule);
  padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 11px; color: var(--muted-2); font-family: var(--mono);
  letter-spacing: 0.04em;
}