:root {
  --navy: #002a68;
  --cyan: #00b0de;
  --navy-2: #001a44;
  --cyan-2: #008fb8;
  --bg: #ffffff;
  --bg-alt: #f4f8fc;
  --text: #0c1a36;
  --muted: #5a6478;
  --line: #e3eaf2;
  --shadow: 0 10px 30px rgba(0, 42, 104, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 42, 104, 0.14);
  --radius: 14px;
  --radius-sm: 10px;
  --container: 1200px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--navy); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--cyan); }

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

/* ------- Header ------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 16px rgba(0,42,104,.05);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.logo-img { height: 40px; width: auto; }
.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}
.nav a {
  font-weight: 500;
  font-size: 15px;
  color: var(--text);
  position: relative;
  padding: 6px 0;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav a:hover::after { transform: scaleX(1); }

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  background: #fff;
}
.lang-btn {
  border: 0;
  background: transparent;
  padding: 6px 12px;
  font: inherit;
  font-weight: 600;
  font-size: 13px;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.lang-btn.active {
  background: var(--navy);
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 0; background: transparent;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}
.menu-toggle span {
  width: 22px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

/* ------- Sections ------- */
.section {
  padding: 96px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-alt);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 20px;
  color: var(--navy);
}
.h1 .accent {
  display: block;
  background: linear-gradient(90deg, var(--navy), var(--cyan));
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}
.h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--navy);
}
.h3 {
  font-size: 22px;
  line-height: 1.3;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--navy);
}
.lead {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 28px;
  max-width: 540px;
}
.muted { color: var(--muted); margin: 0; }

/* ------- Row layouts ------- */
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.row.reverse .col.text { order: 2; }
.row.reverse .col.image { order: 1; }
.col.image {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.col.image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: calc(var(--radius) - 4px);
  display: block;
}

/* ------- About logo ------- */
.about-logo {
  width: 65% !important;
  height: auto !important;
  max-width: 65% !important;
  max-height: 100% !important;
  object-fit: contain;
}

/* ------- Hero visual (animated) ------- */
.hero-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 30% 30%, rgba(0,176,222,.10), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(0,42,104,.10), transparent 60%),
    linear-gradient(135deg, #f7fbff 0%, #eaf4fb 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  isolation: isolate;
}

.hero-visual .pcb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: .85;
}
.pcb-traces path {
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  animation: traceDraw 2.6s var(--ease) forwards;
}
.pcb-traces path:nth-child(1) { animation-delay: .1s; }
.pcb-traces path:nth-child(2) { animation-delay: .25s; }
.pcb-traces path:nth-child(3) { animation-delay: .4s; }
.pcb-traces path:nth-child(4) { animation-delay: .15s; }
.pcb-traces path:nth-child(5) { animation-delay: .3s; }
.pcb-traces path:nth-child(6) { animation-delay: .45s; }
.pcb-traces path:nth-child(7) { animation-delay: .6s; }
.pcb-traces path:nth-child(8) { animation-delay: .55s; }
.pcb-traces path:nth-child(9) { animation-delay: .35s; }
@keyframes traceDraw {
  to { stroke-dashoffset: 0; }
}

.pcb-flows .flow {
  stroke-dasharray: 18 82;
  stroke-dashoffset: 100;
  filter: drop-shadow(0 0 4px rgba(0,176,222,.7));
  animation: flowMove 3.6s linear infinite;
}
.flow-1 { animation-delay: 0s; }
.flow-2 { animation-delay: 1.2s; }
.flow-3 { animation-delay: 2.4s; }
@keyframes flowMove {
  to { stroke-dashoffset: 0; }
}

.pcb-pads circle {
  filter: drop-shadow(0 0 3px rgba(0,176,222,.55));
  animation: padBlink 4s ease-in-out infinite;
}
.pcb-pads circle:nth-child(2n)  { animation-delay: .8s; }
.pcb-pads circle:nth-child(3n)  { animation-delay: 1.6s; }
.pcb-pads circle:nth-child(5n)  { animation-delay: 2.4s; }
@keyframes padBlink {
  0%, 100% { opacity: .9; }
  50%      { opacity: .35; }
}

.pcb-chips .chip {
  animation: chipGlow 3s ease-in-out infinite;
}
.chip-2 { animation-delay: 1.5s; }
@keyframes chipGlow {
  0%, 100% { filter: drop-shadow(0 0 0 rgba(0,176,222,0)); }
  50%      { filter: drop-shadow(0 0 6px rgba(0,176,222,.7)); }
}

.hero-visual .pulse {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 2px solid rgba(0,176,222,.35);
  transform: translate(-50%, -50%) scale(0.4);
  animation: pulse 3.6s var(--ease) infinite;
  z-index: 0;
}
.hero-visual .pulse-1 { width: 220px; height: 220px; animation-delay: 0s; }
.hero-visual .pulse-2 { width: 220px; height: 220px; animation-delay: 1.2s; border-color: rgba(0,42,104,.28); }
.hero-visual .pulse-3 { width: 220px; height: 220px; animation-delay: 2.4s; border-color: rgba(0,176,222,.22); }

@keyframes pulse {
  0%   { transform: translate(-50%, -50%) scale(0.4); opacity: .9; }
  80%  { opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
}

.hero-visual .orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 1px dashed rgba(0,42,104,.18);
  transform: translate(-50%, -50%);
  z-index: 0;
}
.hero-visual .orbit-1 {
  width: 70%;
  aspect-ratio: 1;
  animation: spin 28s linear infinite;
}
.hero-visual .orbit-2 {
  width: 90%;
  aspect-ratio: 1;
  border-color: rgba(0,176,222,.18);
  animation: spin 40s linear infinite reverse;
}
@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-visual .ecg {
  position: relative;
  width: 90%;
  height: auto;
  z-index: 2;
}
.ecg-baseline {
  fill: none;
  stroke: rgba(0,42,104,.12);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}
.ecg-path {
  fill: none;
  stroke: url(#ecgGrad);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: ecgDraw 4s var(--ease) infinite;
}
.ecg-dot {
  fill: var(--cyan);
  filter: drop-shadow(0 0 8px rgba(0,176,222,.7));
  offset-path: path("M0,150 L120,150 L150,150 L165,120 L180,180 L195,80 L210,210 L225,150 L260,150 L285,150 L300,110 L315,190 L330,150 L380,150 L405,150 L420,130 L435,170 L450,150 L600,150");
  offset-rotate: 0deg;
  animation: ecgTravel 4s var(--ease) infinite;
}
@keyframes ecgDraw {
  0%   { stroke-dashoffset: 1400; }
  60%  { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 0; opacity: .9; }
}
@keyframes ecgTravel {
  0%   { offset-distance: 0%;   opacity: 0; }
  10%  { opacity: 1; }
  60%  { offset-distance: 100%; opacity: 1; }
  70%, 100% { offset-distance: 100%; opacity: 0; }
}

.hero-visual .hex {
  position: absolute;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(0,42,104,.18);
  color: var(--navy);
  z-index: 3;
  animation: float 6s ease-in-out infinite;
}
.hero-visual .hex svg { width: 26px; height: 26px; }
.hero-visual .hex-a { top: 14%; left: 12%; animation-delay: 0s; color: var(--navy); }
.hero-visual .hex-b { top: 22%; right: 12%; animation-delay: 1.4s; color: var(--cyan); }
.hero-visual .hex-c { bottom: 14%; left: 22%; animation-delay: 2.8s; color: var(--navy); }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50%      { transform: translateY(-12px) rotate(2deg); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-visual .pulse,
  .hero-visual .orbit,
  .hero-visual .hex,
  .ecg-path,
  .ecg-dot,
  .pcb-traces path,
  .pcb-flows .flow,
  .pcb-pads circle,
  .pcb-chips .chip { animation: none; }
  .ecg-path { stroke-dashoffset: 0; }
  .pcb-traces path { stroke-dashoffset: 0; }
  .pcb-flows { display: none; }
  .ecg-dot { display: none; }
}

/* ------- Hero ------- */
.hero {
  padding-top: 80px;
  padding-bottom: 80px;
  background:
    radial-gradient(1000px 500px at 90% -10%, rgba(0,176,222,.10), transparent 60%),
    radial-gradient(700px 400px at -10% 100%, rgba(0,42,104,.08), transparent 60%);
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-weight: 600;
  font-size: 15px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--navy), var(--cyan));
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 176, 222, 0.35);
}
.btn-primary:hover { color: #fff; box-shadow: 0 12px 28px rgba(0, 176, 222, 0.45); }
.btn-secondary {
  background: #fff;
  color: var(--navy);
  border-color: var(--line);
  box-shadow: var(--shadow);
}
.btn-secondary:hover { color: var(--navy); border-color: var(--cyan); }
.phone {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.phone a {
  color: var(--navy);
  font-weight: 600;
  margin-left: 6px;
}

/* ------- Services ------- */
.service { margin-bottom: 96px; }
.service:last-child { margin-bottom: 0; }

/* ------- Brands ------- */
.brand-strip {
  list-style: none;
  margin: 0;
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.brand-strip li {
  text-align: center;
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 18px;
  color: var(--navy);
  padding: 16px 8px;
  position: relative;
  transition: color .25s var(--ease), transform .25s var(--ease);
}
.brand-strip li:hover {
  color: var(--cyan);
  transform: translateY(-2px);
}
.brand-strip li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px; top: 25%;
  width: 1px; height: 50%;
  background: var(--line);
}

/* ------- Why us cards ------- */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,176,222,.4);
}
.card p { margin: 0; color: var(--muted); }
.card-icon {
  width: 56px; height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,42,104,.08), rgba(0,176,222,.16));
  color: var(--navy);
  margin-bottom: 16px;
}

/* ------- Specialists ------- */
.specialists-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 460px));
  gap: 28px;
  justify-content: center;
}
.specialist-card {
  display: flex;
  gap: 22px;
  align-items: center;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.specialist-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,176,222,.4);
}
.specialist-photo {
  flex-shrink: 0;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-alt);
  border: 3px solid #fff;
  box-shadow: 0 8px 24px rgba(0,42,104,.18);
}
.specialist-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.specialist-info { flex: 1; min-width: 0; }
.specialist-name { margin-bottom: 8px; }
.specialist-info p { margin: 0; color: var(--muted); font-size: 15px; }

@media (max-width: 720px) {
  .specialist-card { flex-direction: column; text-align: center; gap: 16px; padding: 22px; }
  .specialist-photo { width: 110px; height: 110px; }
}

/* ------- Contact grid ------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,176,222,.4);
  color: var(--text);
}
.contact-icon {
  width: 52px; height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  color: #fff;
  flex-shrink: 0;
}
.contact-wa { background: #25D366; }
.contact-viber { background: #7360F2; }
.contact-tg { background: #229ED9; }
.contact-email { background: linear-gradient(135deg, var(--navy), var(--cyan)); }
.contact-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}
.contact-value {
  display: block;
  font-weight: 600;
  font-size: 16px;
  color: var(--navy);
}

/* ------- Footer ------- */
.site-footer {
  background: var(--navy);
  color: #cad6e8;
  padding: 36px 0;
  margin-top: 40px;
}
.site-footer a { color: #fff; }
.site-footer a:hover { color: var(--cyan); }
.footer-inner {
  display: flex;
  justify-content: center;
}
.footer-inner img {
  height: 36px;
  filter: brightness(0) invert(1);
  opacity: .95;
}

/* ------- Reveal animation ------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ------- Responsive ------- */
@media (max-width: 960px) {
  .row { grid-template-columns: 1fr; gap: 32px; }
  .row.reverse .col.text { order: 1; }
  .row.reverse .col.image { order: 0; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .brand-strip { grid-template-columns: repeat(2, 1fr); }
  .brand-strip li:not(:last-child)::after { display: none; }
  .section { padding: 72px 0; }
  .service { margin-bottom: 64px; }
}

@media (max-width: 720px) {
  .container { padding: 0 18px; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px 18px 16px;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 24px rgba(0,42,104,.08);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav a:last-child { border-bottom: 0; }
  .menu-toggle { display: flex; order: 3; }
  .lang-switch { order: 2; margin-left: auto; padding: 2px; }
  .lang-btn { padding: 5px 10px; font-size: 12px; }
  .logo-img { height: 34px; }
  .header-inner { gap: 8px; height: 64px; }
  .nav { top: 64px; }

  .section { padding: 56px 0; }
  .hero { padding-top: 32px; padding-bottom: 56px; }
  .section-head { margin-bottom: 36px; }
  .lead { font-size: 16px; }
  .h3 { font-size: 19px; }

  .cards { grid-template-columns: 1fr; gap: 16px; }
  .card { padding: 22px 20px; }
  .col.image { aspect-ratio: 16 / 10; padding: 8px; }
  .hero-visual { aspect-ratio: 5 / 4; }
  .hero-visual .hex { width: 42px; height: 42px; }
  .hero-visual .hex svg { width: 22px; height: 22px; }
  .hero-visual .pulse-1,
  .hero-visual .pulse-2,
  .hero-visual .pulse-3 { width: 160px; height: 160px; }
  .service { margin-bottom: 48px; }

  .brand-strip { grid-template-columns: repeat(3, 1fr); padding: 20px; gap: 12px; }
  .brand-strip li { font-size: 14px; letter-spacing: 0.12em; padding: 10px 4px; }
  .brand-strip li:not(:last-child)::after { display: none; }

  .contact-card { padding: 18px; gap: 14px; }
  .contact-icon { width: 44px; height: 44px; }
  .contact-value { font-size: 15px; }

  .btn { padding: 12px 18px; font-size: 14px; }
  .cta-row { gap: 10px; }

  .footer-inner { justify-content: center; }
}

@media (max-width: 420px) {
  .h1 { font-size: 32px; }
  .brand-strip { grid-template-columns: repeat(2, 1fr); }
  .btn { flex: 1 1 calc(50% - 10px); justify-content: center; }
}