/* ITB.guru — Industrial Technology Bridge
   Recreated from design reference (ITB Site.dc.html). Tokens per handoff README. */

/* ---------- Fonts (self-hosted) ---------- */
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 400 900;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/archivo-var.woff2) format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/plexmono-400.woff2) format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/plexmono-500.woff2) format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/plexmono-600.woff2) format('woff2');
}

/* ---------- Tokens ---------- */
:root {
  --bg: #0E0F0D;
  --bg-alt: #121310;
  --bg-footer: #0B0C0A;
  --line: #26271F;
  --line-2: #3B3C33;
  --badge-line: #3A3626;
  --text: #ECEAE4;
  --text-2: #B9B7AB;
  --muted: #8A897E;
  --faint: #4E4F45;
  --amber: #E8A33D;
  --amber-hi: #F2C170;
}

/* ---------- Base ---------- */
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}
body {
  font-family: 'Archivo', sans-serif;
  color: var(--text);
  min-width: 320px;
}
::selection {
  background: var(--amber);
  color: var(--bg);
}
a {
  color: var(--amber);
  text-decoration: none;
}
a:hover {
  color: var(--amber-hi);
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.mono {
  font-family: 'IBM Plex Mono', monospace;
}

/* 1200px content column with full-height hairline borders */
.col {
  max-width: 1200px;
  margin: 0 auto;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  padding-left: 32px;
  padding-right: 32px;
}

.kicker {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.btn-solid {
  display: inline-block;
  background: var(--amber);
  color: var(--bg);
  font-weight: 700;
}
.btn-solid:hover {
  background: var(--amber-hi);
  color: var(--bg);
}
.btn-outline {
  display: inline-block;
  border: 1px solid var(--line-2);
  color: var(--text);
  font-weight: 600;
}
.btn-outline:hover {
  border-color: var(--amber);
  color: var(--text);
}

/* ---------- Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 0 32px;
  min-height: 64px;
  background: rgba(14, 15, 13, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.brand-mark {
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.5px;
}
.brand-sub {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
}
.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 28px;
  font-size: 14px;
  font-weight: 500;
}
.site-nav a {
  color: var(--text-2);
}
.site-nav a:hover {
  color: var(--text);
}
.site-nav .btn-solid {
  padding: 9px 18px;
  font-size: 13px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: 96px;
  padding-bottom: 88px;
}
.availability {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--amber);
  border: 1px solid var(--badge-line);
  padding: 6px 12px;
  margin-bottom: 36px;
}
.availability-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse-dot 2s infinite;
}
.hero-kicker {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(42px, 6.5vw, 80px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -2px;
  margin: 0 0 28px;
  max-width: 920px;
  text-wrap: balance;
}
.hero-sub {
  font-size: 19px;
  line-height: 1.6;
  color: var(--text-2);
  max-width: 640px;
  margin: 0 0 40px;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-ctas a {
  padding: 15px 30px;
  font-size: 15px;
}
.hero-corner {
  position: absolute;
  right: 32px;
  bottom: 24px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--faint);
  text-align: right;
  line-height: 1.8;
}

/* ---------- Industry strip ---------- */
.industry-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
}
.industry-strip {
  display: flex;
  flex-wrap: wrap;
  padding-left: 0;
  padding-right: 0;
}
.industry-strip div {
  flex: 1 1 140px;
  padding: 18px 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  border-right: 1px solid var(--line);
  text-align: center;
  letter-spacing: 1px;
}
.industry-strip div:last-child {
  border-right: none;
}

/* ---------- Sections ---------- */
.section {
  padding-top: 88px;
  padding-bottom: 88px;
}
.section-alt {
  border-top: 1px solid var(--line);
  background: var(--bg-alt);
}
.section-plain {
  border-top: 1px solid var(--line);
}

/* ---------- Services ---------- */
.services h2 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 56px;
  max-width: 700px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.service-card {
  background: var(--bg-alt);
  padding: 36px 32px;
}
.service-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--amber);
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px;
}
.service-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
  margin: 0 0 20px;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chips span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--line-2);
  padding: 4px 8px;
}

/* ---------- Track record ---------- */
.record-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 64px;
}
.record-grid h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 24px;
}
.record-grid p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-2);
  margin: 0 0 20px;
}
.record-grid p:last-child {
  margin-bottom: 0;
}
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}
.stat {
  background: var(--bg);
  padding: 28px 24px;
}
.stat-big {
  font-size: 40px;
  font-weight: 900;
  color: var(--amber);
  letter-spacing: -1px;
}
.stat-small {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.stat-caption {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
  margin-top: 6px;
}

/* ---------- Lab ---------- */
.lab h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 16px;
}
.lab-intro {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-2);
  max-width: 620px;
  margin: 0 0 48px;
}
.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.lab-card {
  display: block;
  border: 1px solid var(--line);
  padding: 28px;
  color: var(--text);
  background: var(--bg-alt);
}
.lab-card:hover {
  border-color: var(--amber);
  color: var(--text);
}
.lab-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.lab-path {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--amber);
}
.lab-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  color: var(--bg);
  background: var(--amber);
  padding: 3px 8px;
}
.lab-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.lab-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

/* ---------- Writing ---------- */
.writing h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  margin: 0 0 48px;
}
.post-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}
.post-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 24px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
}
.post-row:hover {
  color: var(--amber);
}
.post-title {
  font-size: 18px;
  font-weight: 600;
}
.post-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- Contact ---------- */
.contact {
  padding-top: 104px;
  padding-bottom: 104px;
  text-align: center;
}
.contact .kicker {
  margin-bottom: 20px;
}
.contact h2 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  letter-spacing: -1.5px;
  margin: 0 auto 20px;
  max-width: 720px;
  text-wrap: balance;
}
.contact-sub {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 40px;
}
.contact-ctas {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.contact-ctas a {
  padding: 16px 34px;
  font-size: 15px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-footer);
}
.site-footer .col {
  padding-top: 28px;
  padding-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer div {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--faint);
}