/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--itx-blue);
  color: #fff;
}

.btn--primary:hover {
  background: var(--itx-blue-dark);
}

.btn--outline {
  border: 1px solid var(--itx-border-on-dark);
  color: var(--itx-text-on-dark);
}

.btn--outline:hover {
  border-color: var(--itx-blue-light);
  color: var(--itx-blue-light);
}

.btn--outline-light {
  border: 1px solid var(--itx-ink);
  color: var(--itx-ink);
}

.btn--outline-light:hover {
  border-color: var(--itx-blue);
  color: var(--itx-blue);
}

/* ---------- Eyebrow label ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--itx-blue);
  margin-bottom: var(--space-sm);
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(26, 23, 24, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--itx-border-on-dark);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--itx-text-on-dark);
  font-size: 1.15rem;
  text-transform: uppercase;
}

.brand img {
  width: 34px;
  height: 34px;
}

.nav {
  display: none;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--itx-text-on-dark-muted);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--itx-text-on-dark);
}

.nav__link[aria-current="page"] {
  position: relative;
}

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--itx-blue);
}

.nav__cta {
  display: none;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--itx-text-on-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding-block: var(--space-sm);
  border-top: 1px solid var(--itx-border-on-dark);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav__link {
  padding: 12px 4px;
  font-weight: 600;
  color: var(--itx-text-on-dark-muted);
  border-bottom: 1px solid var(--itx-border-on-dark);
}

.mobile-nav__link:last-of-type {
  border-bottom: none;
}

.mobile-nav__link[aria-current="page"] {
  color: var(--itx-blue-light);
}

.mobile-nav__cta {
  margin-top: var(--space-sm);
  text-align: center;
  justify-content: center;
}

@media (min-width: 1024px) {
  .nav {
    display: flex;
  }
  .nav__cta {
    display: inline-flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-3xl) var(--space-2xl);
}

.contact-hero {
  padding-block: var(--space-3xl);
}

.hero__lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  margin-top: var(--space-md);
  max-width: 56ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* ---------- Cards / feature grid ---------- */
.card {
  background: var(--itx-bg-white);
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  height: 100%;
}

.is-dark .card,
.section--grid-dark .card {
  background: var(--itx-ink-soft);
  border-color: var(--itx-border-on-dark);
}

.card__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--itx-blue);
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.card h3 {
  margin-bottom: var(--space-xs);
}

.card p {
  font-size: 0.95rem;
  max-width: none;
}

.card__link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--itx-blue);
}

.card__link:hover {
  color: var(--itx-blue-dark);
}

/* ---------- Checklist ---------- */
.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  color: var(--itx-text-body);
}

.is-dark .checklist li,
.section--grid-dark .checklist li {
  color: var(--itx-text-on-dark);
}

.checklist li::before {
  content: "+";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: rgba(16, 155, 203, 0.12);
  color: var(--itx-blue);
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1;
}

/* ---------- Diagram: rack ---------- */
.rack {
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  background: var(--itx-bg-white);
  max-width: 420px;
}

.rack__label {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--itx-blue);
  margin-bottom: var(--space-sm);
  display: block;
}

.rack__unit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: 12px 14px;
  border: 1px solid var(--itx-border);
  border-radius: 4px;
  margin-bottom: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--itx-text-body);
  background: var(--itx-bg-light);
}

.rack__unit span:first-child {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--itx-blue);
  font-weight: 700;
}

.rack__unit--growth {
  border-style: dashed;
  background: transparent;
  color: var(--itx-text-muted);
  font-weight: 500;
  justify-content: center;
}

/* ---------- Diagram: network tree ---------- */
.network-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: var(--space-lg);
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-md);
  background: var(--itx-bg-white);
}

.network-diagram__node {
  padding: 12px 20px;
  border: 1px solid var(--itx-border);
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.88rem;
  text-align: center;
  background: var(--itx-bg-light);
  color: var(--itx-text-body);
}

.network-diagram__node--dashed {
  border-style: dashed;
  background: transparent;
  color: var(--itx-blue-dark);
}

.network-diagram__connector {
  width: 1px;
  height: 22px;
  background: var(--itx-border);
}

.network-diagram__row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 22px;
  position: relative;
  padding-top: 22px;
  border-top: 1px solid var(--itx-border);
  width: 100%;
}

.network-diagram__row .network-diagram__node {
  flex: 1 1 120px;
  background: var(--itx-bg-white);
}

.network-diagram__caption {
  margin-top: var(--space-md);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--itx-text-muted);
  text-align: center;
}

/* ---------- Diagram: floor plan ---------- */
.floorplan {
  display: grid;
  gap: var(--space-sm);
}

.floorplan__zone {
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  background: var(--itx-bg-white);
  min-height: 96px;
  position: relative;
}

.floorplan__zone-label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--itx-text-muted);
}

.floorplan__icons {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.floorplan__icons span {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--itx-blue);
  display: inline-block;
}

@media (min-width: 640px) {
  .floorplan {
    grid-template-columns: repeat(3, 1fr);
  }
}

.icon-legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: var(--space-md);
}

.icon-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--itx-text-body);
}

.icon-legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--itx-blue);
  flex-shrink: 0;
}

/* ---------- Stats / certs ---------- */
.stat {
  padding: var(--space-lg);
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-md);
}

.stat__value {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--itx-blue);
  letter-spacing: -0.01em;
}

.stat__label {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--itx-text-muted);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--space-sm);
}

.pill {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--itx-border);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--itx-text-body);
  background: var(--itx-bg-white);
}

a.pill:hover {
  border-color: var(--itx-blue);
  color: var(--itx-blue);
}

a.pill[aria-current="true"] {
  background: var(--itx-blue);
  border-color: var(--itx-blue);
  color: #fff;
}

.jumpnav {
  margin-top: var(--space-lg);
}

.service-block {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--itx-border);
}

.service-block:first-of-type {
  border-top: none;
}

.service-block__index {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--itx-text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

/* ---------- Table ---------- */
.pricing-table {
  min-width: 640px;
  border: 1px solid var(--itx-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.pricing-table th,
.pricing-table td {
  text-align: left;
  padding: 16px 20px;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--itx-border);
}

.pricing-table thead th {
  background: var(--itx-ink);
  color: var(--itx-text-on-dark-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pricing-table tbody tr:last-child td {
  border-bottom: none;
}

.pricing-table tbody tr:nth-child(odd) {
  background: var(--itx-bg-light);
}

.pricing-table td:first-child {
  font-weight: 700;
  color: var(--itx-ink);
}

/* ---------- CTA band ---------- */
.cta-band {
  padding-block: var(--space-2xl);
  background: var(--itx-ink);
  text-align: center;
}

.cta-band h2 {
  color: var(--itx-text-on-dark);
}

.cta-band p {
  margin: var(--space-sm) auto 0;
  color: var(--itx-text-on-dark-muted);
}

.cta-band__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* ---------- Contact block ---------- */
.contact-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.contact-block__item {
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 700;
  color: var(--itx-text-on-dark);
  border-bottom: 1px solid var(--itx-border-on-dark);
  padding-bottom: var(--space-sm);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.contact-block__item:hover {
  color: var(--itx-blue-light);
}

.contact-block__label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--itx-text-on-dark-muted);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--itx-ink);
  color: var(--itx-text-on-dark-muted);
  padding-block: var(--space-xl) var(--space-lg);
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--itx-text-on-dark);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.site-footer__brand img {
  width: 30px;
  height: 30px;
}

.site-footer__tagline {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  max-width: 40ch;
}

.site-footer__cols {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.site-footer__col h4 {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--itx-text-on-dark);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.site-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer__col a {
  font-size: 0.9rem;
  color: var(--itx-text-on-dark-muted);
}

.site-footer__col a:hover {
  color: var(--itx-blue-light);
}

.site-footer__bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--itx-border-on-dark);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

@media (min-width: 768px) {
  .site-footer__top {
    flex-direction: row;
    justify-content: space-between;
  }
  .site-footer__cols {
    grid-template-columns: repeat(3, 1fr);
    flex: 1;
    justify-content: flex-end;
    max-width: 560px;
    margin-left: auto;
  }
}