/* ---------- Tokens ---------- */
:root {
  --navy: #142F86;
  --ink: #0B1338;
  --signal: #2F5FE0;
  --bg: #F5F6F9;
  --white: #FFFFFF;
  --slate: #5C6470;
  --hairline: #DCE0EA;

  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --max-w: 1120px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--navy);
  color: var(--white);
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 16px; top: 16px; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--navy);
  color: var(--white);
}
.btn-primary:hover { background: var(--signal); }
.btn-ghost {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--hairline);
}
.btn-ghost:hover { border-color: var(--navy); }
.btn-small { padding: 9px 16px; font-size: 0.88rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(245, 246, 249, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
  z-index: 50;
}
.header-row {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 76px;
}
.brand { display: flex; align-items: center; }
.brand-logo { height: 32px; width: auto; }
.main-nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 0.95rem;
  font-weight: 500;
}
.main-nav a { text-decoration: none; color: var(--ink); }
.main-nav a:hover { color: var(--signal); }
.header-row .btn-small { margin-left: 8px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
}

/* ---------- Hero ---------- */
.hero { padding: 88px 0 96px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.3rem, 4vw, 3.4rem);
  line-height: 1.12;
  color: var(--ink);
}
.hero-sub {
  margin-top: 22px;
  font-size: 1.15rem;
  color: var(--slate);
  max-width: 46ch;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-note {
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--slate);
}
.hero-note code {
  background: var(--white);
  border: 1px solid var(--hairline);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.hero-art { display: flex; justify-content: center; }
.cable-art { width: 100%; max-width: 340px; height: auto; }
.cable-line { stroke: var(--navy); stroke-width: 6; stroke-linecap: round; }
.cable-dot { fill: var(--navy); }
.plug-body { fill: var(--white); stroke: var(--navy); stroke-width: 6; }
.plug-pins line { stroke: var(--navy); stroke-width: 4; stroke-linecap: round; }

/* ---------- Section shared ---------- */
.section-head { max-width: 56ch; margin-bottom: 44px; }
.section-head h2 {
  font-size: clamp(1.7rem, 2.6vw, 2.1rem);
}
.section-head p {
  margin-top: 10px;
  color: var(--slate);
  font-size: 1.05rem;
}

/* ---------- Services ---------- */
.services { padding: 96px 0; }
.service-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
}
.service-list li {
  padding: 28px 24px 28px 0;
  border-bottom: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
}
.service-list li:nth-child(3n) { border-right: none; padding-right: 0; }
.service-list li:nth-child(3n+1) { padding-left: 0; }
.service-list h3 { font-size: 1.08rem; margin-bottom: 8px; }
.service-list p { color: var(--slate); font-size: 0.95rem; margin: 0; }

/* ---------- Process ---------- */
.process { padding: 96px 0; background: var(--white); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--signal);
  display: block;
  margin-bottom: 14px;
}
.steps h3 { font-size: 1.15rem; margin-bottom: 8px; }
.steps p { color: var(--slate); margin: 0; }

/* ---------- About ---------- */
.about { padding: 96px 0; }
.about-grid { max-width: 760px; }
.about h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.3rem);
  color: var(--navy);
}
.about p {
  margin-top: 20px;
  font-size: 1.08rem;
  color: var(--ink);
}

/* ---------- CTA ---------- */
.cta { background: var(--ink); color: var(--white); padding: 72px 0; }
.cta-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.cta h2 { font-size: clamp(1.6rem, 2.4vw, 2rem); }
.cta p { margin-top: 10px; color: #B9C0D4; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-actions .btn-primary { background: var(--signal); }
.cta-actions .btn-primary:hover { background: var(--white); color: var(--ink); }
.cta-actions .btn-ghost { color: var(--white); border-color: #3A4270; }
.cta-actions .btn-ghost:hover { border-color: var(--white); }

/* ---------- Footer ---------- */
.site-footer { padding: 36px 0; }
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-logo { height: 22px; width: auto; opacity: 0.85; }
.footer-row p { font-size: 0.85rem; color: var(--slate); margin: 0; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 220px; margin: 0 auto; }
  .service-list { grid-template-columns: repeat(2, 1fr); }
  .service-list li:nth-child(3n) { border-right: 1px solid var(--hairline); padding-right: 24px; }
  .service-list li:nth-child(3n+1) { padding-left: 0; }
  .service-list li:nth-child(2n) { border-right: none; padding-right: 0; }
  .service-list li:nth-child(2n+1) { padding-left: 0; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--hairline);
    padding: 8px 24px 16px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-bottom: 1px solid var(--hairline); }
  .main-nav a:last-child { border-bottom: none; }
  .nav-toggle { display: flex; }
  .service-list { grid-template-columns: 1fr; }
  .service-list li { border-right: none !important; padding: 24px 0 !important; }
  .header-row .btn-small { display: none; }
}