/* ===== CNSTECH Networks — networks.css ===== */

/* --- Custom Properties --- */
:root {
  --bg: #0c0e13;
  --bg-card: #13161d;
  --bg-card-hover: #191d27;
  --bg-section-alt: #101318;
  --surface: #1a1e28;
  --border: #23283480;
  --border-active: #00e5ff30;
  --text: #d0d4dc;
  --text-dim: #8a90a0;
  --text-heading: #eef0f4;
  --cyan: #00e5ff;
  --cyan-dim: #00e5ff60;
  --cyan-glow: #00e5ff18;
  --white: #fff;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1140px;
  --header-h: 64px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--white); }
ul { list-style: none; }

/* Focus */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

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

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 14, 19, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo-link { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 34px; width: auto; }
.nav-list {
  display: flex;
  gap: 32px;
}
.nav-list a {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 4px 0;
  position: relative;
}
.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width var(--transition);
}
.nav-list a:hover::after { width: 100%; }
.nav-list a:hover { color: var(--white); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  z-index: 110;
}
.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
  border-radius: 2px;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  font-size: 0.82rem;
}
.breadcrumb ol {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb li { display: flex; align-items: center; gap: 6px; }
.breadcrumb li:not(:last-child)::after {
  content: '›';
  color: var(--text-dim);
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current] { color: var(--text); }

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 64px 0 80px;
  overflow: hidden;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  color: var(--text-heading);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.hero-intro {
  margin-top: 18px;
  font-size: 1.05rem;
  color: var(--text);
  max-width: 540px;
}
.hero-ctas {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-chips {
  margin-top: 24px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.chip {
  display: inline-block;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--cyan-glow);
  border: 1px solid var(--border-active);
  border-radius: 20px;
  color: var(--cyan);
  letter-spacing: 0.01em;
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.hero-img {
  width: 100%;
  aspect-ratio: 1198 / 800;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  letter-spacing: 0.01em;
}
.btn-primary {
  background: var(--cyan);
  color: var(--bg);
}
.btn-primary:hover {
  background: #33ecff;
  color: var(--bg);
  box-shadow: 0 0 20px var(--cyan-dim);
}
.btn-secondary {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--cyan-dim);
}
.btn-secondary:hover {
  background: var(--cyan-glow);
  color: var(--white);
  border-color: var(--cyan);
}

/* ===== NETWORK TOPOLOGY ANIMATION ===== */
.network-topology {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.35;
}
.topo-node {
  position: absolute;
  color: var(--cyan);
}
.topo-switch { bottom: 50px; left: 50%; transform: translateX(-50%); }
.topo-ap { bottom: 90px; left: 25%; }
.topo-pc { bottom: 20px; left: 30%; }
.topo-cam { bottom: 20px; right: 28%; }

.topo-line {
  position: absolute;
  background: var(--cyan-dim);
  height: 1px;
}
.topo-line-1 { width: 120px; bottom: 64px; left: calc(25% + 14px); transform: rotate(-25deg); transform-origin: left center; }
.topo-line-2 { width: 100px; bottom: 40px; left: calc(50% - 50px); transform: rotate(60deg); transform-origin: center; }
.topo-line-3 { width: 120px; bottom: 44px; right: calc(28% + 14px); transform: rotate(25deg); transform-origin: right center; }

.packet {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--cyan);
}
.packet-1 {
  bottom: 64px;
  left: calc(25% + 14px);
  animation: packetMove1 3s ease-in-out infinite;
}
.packet-2 {
  bottom: 50px;
  left: 50%;
  animation: packetMove2 4s ease-in-out infinite 1s;
}
.packet-3 {
  bottom: 44px;
  right: 28%;
  animation: packetMove3 3.5s ease-in-out infinite 0.5s;
}

@keyframes packetMove1 {
  0% { transform: translate(0, 0); opacity: 0; }
  10% { opacity: 1; }
  50% { transform: translate(100px, -20px); opacity: 1; }
  90% { opacity: 0; }
  100% { transform: translate(120px, -24px); opacity: 0; }
}
@keyframes packetMove2 {
  0% { transform: translate(0, 0); opacity: 0; }
  10% { opacity: 1; }
  50% { transform: translate(-40px, 30px); opacity: 1; }
  90% { opacity: 0; }
  100% { transform: translate(-50px, 40px); opacity: 0; }
}
@keyframes packetMove3 {
  0% { transform: translate(0, 0); opacity: 0; }
  10% { opacity: 1; }
  50% { transform: translate(-100px, -16px); opacity: 1; }
  90% { opacity: 0; }
  100% { transform: translate(-120px, -20px); opacity: 0; }
}

/* ===== SECTION COMMON ===== */
section {
  padding: 72px 0;
}
section:nth-child(even of .reveal-section) {
  background: var(--bg-section-alt);
}
section h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  color: var(--text-heading);
  font-weight: 700;
  margin-bottom: 36px;
  letter-spacing: -0.01em;
}
.section-intro {
  max-width: 680px;
  color: var(--text);
  margin-bottom: 36px;
  font-size: 1rem;
}

/* ===== SERVICES CARDS ===== */
.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
}
.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-2px);
}
.card-icon {
  color: var(--cyan);
  margin-bottom: 16px;
}
.service-card h3 {
  font-size: 1rem;
  color: var(--text-heading);
  font-weight: 600;
  margin-bottom: 10px;
}
.service-card p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ===== PROCESS ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  position: relative;
}
.process-step {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  column-gap: 18px;
  min-height: 178px;
  padding: 24px 22px;
  background:
    linear-gradient(180deg, rgba(0, 229, 255, 0.07), transparent 42%),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), transparent);
  opacity: 0.45;
}
.process-step:last-child {
  grid-column: 1 / -1;
  min-height: 0;
}
.process-step:hover {
  transform: translateY(-2px);
  border-color: var(--border-active);
  background:
    linear-gradient(180deg, rgba(0, 229, 255, 0.1), transparent 44%),
    var(--bg-card-hover);
}
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--cyan-glow);
  border: 1px solid var(--border-active);
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  grid-row: 1 / span 2;
  margin-bottom: 0;
}
.process-step h3 {
  grid-column: 2;
  font-size: 1rem;
  color: var(--text-heading);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 12px;
}
.process-step p {
  grid-column: 2;
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.65;
  max-width: 720px;
}
.process-connector {
  display: none;
}

/* ===== ECOSYSTEM ===== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.eco-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}
.eco-card svg { flex-shrink: 0; color: var(--cyan); }
.eco-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  color: var(--white);
  transform: translateX(4px);
}

/* ===== SPACES ===== */
.spaces-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.space-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.space-item svg { flex-shrink: 0; color: var(--cyan-dim); margin-top: 2px; }
.space-item h3 {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}
.space-item:hover {
  border-color: var(--border-active);
  background: var(--bg-card-hover);
}

/* ===== PRECISION ===== */
.precision-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 720px;
}
.precision-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  border-left: 2px solid var(--cyan-dim);
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: var(--transition);
}
.precision-item:hover {
  border-left-color: var(--cyan);
  background: var(--bg-card-hover);
}
.precision-marker {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 9px;
}
.precision-item p {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 740px;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item summary {
  cursor: pointer;
  padding: 20px 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--cyan);
  font-weight: 400;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item[open] summary::after {
  content: '−';
}
.faq-item summary:hover { color: var(--cyan); }
.faq-answer {
  padding: 0 0 20px;
}
.faq-answer p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ===== FINAL CTA ===== */
.final-cta {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-section-alt) 0%, var(--bg) 100%);
  padding: 80px 0;
  position: relative;
}
.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
}
.final-cta h2 {
  max-width: 640px;
  margin: 0 auto 20px;
}
.final-cta p {
  max-width: 560px;
  margin: 0 auto 32px;
  color: var(--text);
  font-size: 1rem;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
}
.footer-brand img { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-dim);
  max-width: 320px;
  line-height: 1.6;
}
.footer-nav h3,
.footer-contact h3 {
  font-size: 0.85rem;
  color: var(--text-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.footer-nav ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-nav a,
.footer-contact a {
  font-size: 0.88rem;
  color: var(--text-dim);
}
.footer-nav a:hover,
.footer-contact a:hover { color: var(--cyan); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 40px auto 0;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-bottom p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ===== REVEAL ANIMATION ===== */
.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal-item { opacity: 1; transform: none; }
  .packet { display: none; }
  html { scroll-behavior: auto; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-visual { max-width: 560px; }
  .service-cards { grid-template-columns: repeat(2, 1fr); }
  .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
  .spaces-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .process-step {
    grid-column: auto;
    min-height: 0;
  }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: span 2; }
  .network-topology { display: none; }
}

@media (max-width: 640px) {
  :root { --header-h: 56px; }
  body { font-size: 15px; }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(12, 14, 19, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .nav-list {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  .nav-list a {
    font-size: 1.1rem;
  }

  /* Hamburger open state */
  .nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  section { padding: 48px 0; }
  .hero { padding: 40px 0 56px; }
  .service-cards { grid-template-columns: 1fr; }
  .ecosystem-grid { grid-template-columns: 1fr; }
  .spaces-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand { grid-column: span 1; }
  .process-step { grid-template-columns: 44px 1fr; gap: 0 16px; padding: 20px 18px; }
  .step-num { width: 40px; height: 40px; font-size: 0.8rem; }
  .hero-ctas { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .cta-buttons .btn { width: 100%; max-width: 300px; }
}

/* Google reviews footer link */
.site-footer .footer-review-link,
footer .footer-review-link,
.cnstech-home-2026 footer .footer-review-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  margin-top: .85rem;
  padding: .58rem .85rem;
  border: 1px solid rgba(0, 214, 255, .35);
  border-radius: 8px;
  background: rgba(0, 214, 255, .08);
  color: #00d6ff;
  font-size: .875rem;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
}

.site-footer .footer-review-link:hover,
footer .footer-review-link:hover,
.cnstech-home-2026 footer .footer-review-link:hover {
  border-color: rgba(0, 214, 255, .65);
  background: rgba(0, 214, 255, .14);
  color: #fff;
}