:root {
    --blue: #6ab8ee;
    --blue-deep: #4a9fd4;
    --blue-light: rgba(106, 184, 238, 0.08);
    --blue-glow: rgba(106, 184, 238, 0.15);
    --dark: #1a2332;
    --dark-soft: #243040;
    --mid: #6b7b8d;
    --light: #f5f7fa;
    --white: #ffffff;
    --border: rgba(106, 184, 238, 0.12);
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

  body {
    font-family: 'PT Sans', sans-serif;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
  }

  /* ── Utility ── */
  .container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .section-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }
  .section-label::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--blue);
  }

  .section-title {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--dark);
  }

  /* ── Top Bar ── */
  .topbar {
    background: var(--dark);
    padding: 0.6rem 0;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.6);
  }
  .topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .topbar-items {
    display: flex;
    gap: 2rem;
    align-items: center;
  }
  .topbar-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }
  .topbar a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    transition: color 0.2s;
  }
  .topbar a:hover { color: var(--blue); }
  .topbar-icon {
    width: 14px; height: 14px;
    stroke: var(--blue);
    fill: none;
    stroke-width: 1.5;
  }

  /* ── Header ── */
  .header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0,0,0,0.04);
    transition: box-shadow 0.3s;
  }
  .header.scrolled {
    box-shadow: 0 1px 24px rgba(0,0,0,0.06);
  }
  .header .container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    height: 72px;
  }

  /* Logo block overlaps header/hero boundary */
  .header.scrolled .logo-block {
    transform: translateY(0) scale(0.9);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  }
  .logo-block {
    position: absolute;
    left: max(2rem, calc((100% - 1180px) / 2 + 2rem));
    top: 50%;
    transform: translateY(0);
    z-index: 110;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100px;
    padding: 18px 12px 14px;
    background: var(--white);
    border: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
    transition: box-shadow 0.3s, transform 0.3s;
  }
  .logo-block:hover {
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
    transform: translateY(0) scale(1.03);
  }
  .logo-block img {
    height: 48px;
    margin-bottom: 8px;
  }
  .logo-block-name {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: var(--dark);
    line-height: 1;
  }
  .logo-block-sub {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.5rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    color: var(--mid);
    margin-top: 3px;
  }

  /* Placeholder in header for spacing */
  .logo-spacer {
    width: 120px;
  }
  .nav { display: flex; gap: 2.25rem; align-items: center; }
  .nav a {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--mid);
    text-decoration: none;
    position: relative;
    transition: color 0.25s;
  }
  .nav a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--blue);
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .nav a:hover { color: var(--dark); }
  .nav a:hover::after { width: 100%; }

  .burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
  }
  .burger span {
    display: block;
    width: 24px; height: 2px;
    background: var(--dark);
    transition: all 0.3s;
  }

  /* ── Hero ── */
  .hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    background: var(--dark);
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
      radial-gradient(ellipse at 30% 50%, rgba(106,184,238,0.06) 0%, transparent 50%),
      radial-gradient(ellipse at 80% 30%, rgba(106,184,238,0.04) 0%, transparent 40%);
    z-index: 1;
  }

  /* Blueprint grid */
  .hero-grid {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0.035;
    background-image:
      linear-gradient(rgba(106,184,238,1) 1px, transparent 1px),
      linear-gradient(90deg, rgba(106,184,238,1) 1px, transparent 1px);
    background-size: 50px 50px;
  }
  .hero-grid-fine {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0.02;
    background-image:
      linear-gradient(rgba(106,184,238,1) 0.5px, transparent 0.5px),
      linear-gradient(90deg, rgba(106,184,238,1) 0.5px, transparent 0.5px);
    background-size: 10px 10px;
  }

  /* Scanning line */
  .hero-scan {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--blue) 50%, transparent 100%);
    opacity: 0.15;
    animation: scanDown 6s linear infinite;
    z-index: 1;
  }
  @keyframes scanDown {
    0% { top: 0; }
    100% { top: 100%; }
  }

  /* Engineering schematic SVG */
  .hero-schematic {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 460px; height: 380px;
    z-index: 1;
    opacity: 0;
    animation: schematicReveal 1.5s 0.8s ease-out forwards;
  }
  @keyframes schematicReveal {
    from { opacity: 0; transform: translateY(-50%) translateX(40px); }
    to { opacity: 1; transform: translateY(-50%) translateX(0); }
  }
  .hero-schematic svg {
    width: 100%; height: 100%;
  }

  /* Animated circuit paths */
  .circuit-path {
    stroke: var(--blue);
    fill: none;
    stroke-width: 1;
    opacity: 0.2;
    stroke-dasharray: 8 4;
    animation: circuitFlow 3s linear infinite;
  }
  .circuit-path-glow {
    stroke: var(--blue);
    fill: none;
    stroke-width: 2;
    opacity: 0.08;
    filter: blur(3px);
    stroke-dasharray: 8 4;
    animation: circuitFlow 3s linear infinite;
  }
  @keyframes circuitFlow {
    to { stroke-dashoffset: -24; }
  }
  .circuit-node {
    fill: var(--blue);
    opacity: 0.3;
  }
  .circuit-node-ring {
    stroke: var(--blue);
    fill: none;
    stroke-width: 1;
    opacity: 0.15;
    animation: nodePulse 3s ease-in-out infinite;
  }
  @keyframes nodePulse {
    0%, 100% { r: 8; opacity: 0.15; }
    50% { r: 14; opacity: 0.05; }
  }
  .schematic-label {
    font-family: 'JetBrains Mono', 'Montserrat', monospace;
    font-size: 8px;
    fill: var(--blue);
    opacity: 0.25;
    letter-spacing: 0.1em;
  }
  .schematic-box {
    stroke: var(--blue);
    fill: rgba(106,184,238,0.02);
    stroke-width: 0.8;
    opacity: 0.2;
  }
  .schematic-box-active {
    stroke: var(--blue);
    fill: rgba(106,184,238,0.04);
    stroke-width: 1;
    opacity: 0.3;
    animation: boxPulse 4s ease-in-out infinite;
  }
  @keyframes boxPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.15; }
  }

  /* Corner markers */
  .hero-corner {
    position: absolute;
    width: 40px; height: 40px;
    z-index: 1;
    opacity: 0.12;
  }
  .hero-corner--tl { top: 2rem; left: 2rem; border-top: 2px solid var(--blue); border-left: 2px solid var(--blue); }
  .hero-corner--tr { top: 2rem; right: 2rem; border-top: 2px solid var(--blue); border-right: 2px solid var(--blue); }
  .hero-corner--bl { bottom: 2rem; left: 2rem; border-bottom: 2px solid var(--blue); border-left: 2px solid var(--blue); }
  .hero-corner--br { bottom: 2rem; right: 2rem; border-bottom: 2px solid var(--blue); border-right: 2px solid var(--blue); }

  /* Data readout */
  .hero-readout {
    position: absolute;
    bottom: 3rem;
    right: 5%;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    color: var(--blue);
    opacity: 0.2;
    z-index: 2;
    text-align: right;
    line-height: 1.8;
    animation: heroFadeUp 0.8s 1.2s ease-out both;
  }

  .hero .container {
    position: relative;
    z-index: 2;
  }
  .hero-content {
    max-width: 640px;
  }
  .hero-overline {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--blue);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    animation: heroFadeUp 0.8s 0.2s ease-out forwards;
  }
  .hero-overline::before {
    content: '';
    width: 40px; height: 1px;
    background: var(--blue);
  }
  .hero h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.05;
    color: var(--white);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: heroFadeUp 0.8s 0.35s ease-out forwards;
  }
  .hero p {
    font-size: 1.15rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.55);
    max-width: 480px;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: heroFadeUp 0.8s 0.5s ease-out forwards;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--white);
    background: var(--blue);
    border: none;
    padding: 1rem 2.25rem;
    cursor: pointer;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    animation: heroFadeUp 0.8s 0.65s ease-out forwards;
  }
  .btn-primary:hover {
    background: var(--blue-deep);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(106,184,238,0.3);
  }
  .btn-primary svg {
    width: 16px; height: 16px;
    fill: none; stroke: currentColor;
    stroke-width: 2;
    transition: transform 0.3s;
  }
  .btn-primary:hover svg { transform: translateX(3px); }

  @keyframes heroFadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ── Services ── */
  .services {
    padding: 7rem 0;
    background: var(--white);
  }
  .services-head {
    margin-bottom: 4rem;
  }
  .services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  .services-grid {
    perspective: 1200px;
  }
  .service-card {
    position: relative;
    padding: 2.25rem 1.75rem;
    border: 1px solid rgba(0,0,0,0.06);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    cursor: default;
    transform-style: preserve-3d;
    transform: rotateX(0) rotateY(0);
    background: var(--white);
  }
  .service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: var(--blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .service-card::after {
    content: '';
    position: absolute;
    bottom: -8px; left: 8px; right: 8px;
    height: 8px;
    background: rgba(106,184,238,0.06);
    filter: blur(4px);
    transform: translateZ(-10px);
    transition: all 0.5s;
    opacity: 0;
  }
  .service-card:hover {
    border-color: var(--border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.08), 0 2px 8px rgba(106,184,238,0.1);
    transform: translateY(-8px) rotateX(2deg) scale(1.02);
  }
  .service-card:hover::before { transform: scaleX(1); }
  .service-card:hover::after { opacity: 1; }
  .service-card-img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    margin-bottom: 1.25rem;
    filter: saturate(0.8);
    transition: filter 0.4s;
  }
  .service-card:hover .service-card-img {
    filter: saturate(1);
  }
  .service-card-num {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
  }
  .service-card-icon {
    width: 40px; height: 40px;
    margin-bottom: 1.25rem;
    stroke: var(--blue);
    fill: none;
    stroke-width: 1.5;
  }
  .service-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.75rem;
    line-height: 1.3;
  }
  .service-card p {
    font-size: 0.88rem;
    color: var(--mid);
    line-height: 1.6;
  }

  /* ── About ── */
  .about {
    padding: 7rem 0;
    background: var(--light);
    position: relative;
  }
  .about::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 40%; height: 100%;
    background: linear-gradient(135deg, transparent 60%, var(--blue-light) 100%);
    pointer-events: none;
  }
  .about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
  }
  .about-text p {
    font-size: 1.05rem;
    color: var(--mid);
    line-height: 1.8;
    margin-top: 1.5rem;
  }
  .about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
  }
  .about-stats {
    perspective: 600px;
  }
  .stat {
    text-align: center;
    padding: 1.75rem 1rem;
    background: var(--white);
    border: 1px solid rgba(0,0,0,0.04);
    position: relative;
    transform-style: preserve-3d;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .stat:hover {
    transform: translateY(-4px) rotateX(4deg);
    box-shadow: 0 12px 32px rgba(0,0,0,0.06);
  }
  .stat::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 32px; height: 2px;
    background: var(--blue);
  }
  .stat-value {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
  }
  .stat-value span { color: var(--blue); }
  .stat-label {
    font-size: 0.82rem;
    color: var(--mid);
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }

  .about-visual {
    position: relative;
    height: 400px;
    perspective: 800px;
  }
  .about-img {
    width: 100%; height: 100%;
    background-position: center; background-size: cover; background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
    transform: rotateY(-4deg) rotateX(2deg);
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 20px 20px 60px rgba(0,0,0,0.15), -5px -5px 20px rgba(106,184,238,0.05);
  }
  .about-img:hover {
    transform: rotateY(-1deg) rotateX(1deg);
  }
  .about-img::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
      repeating-linear-gradient(0deg, transparent, transparent 29px, rgba(106,184,238,0.06) 29px, rgba(106,184,238,0.06) 30px),
      repeating-linear-gradient(90deg, transparent, transparent 29px, rgba(106,184,238,0.06) 29px, rgba(106,184,238,0.06) 30px);
  }
  .about-img-text {
    position: absolute;
    bottom: 2rem; left: 2rem;
    font-family: 'Montserrat', sans-serif;
    font-size: 4rem;
    font-weight: 800;
    color: rgba(255,255,255,0.06);
    letter-spacing: -0.03em;
    line-height: 0.9;
  }
  .about-accent {
    position: absolute;
    top: -24px; right: -24px;
    width: 120px; height: 120px;
    border: 2px solid var(--blue);
    opacity: 0.15;
  }

  /* ── Projects ── */
  .projects {
    padding: 7rem 0;
    background: var(--white);
  }
  .projects-head {
    margin-bottom: 4rem;
  }
  .projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .projects-grid {
    perspective: 1000px;
  }
  .project-card {
    position: relative;
    height: 360px;
    overflow: hidden;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.6s;
  }
  .project-card:nth-child(1) { transform: rotateY(2deg); }
  .project-card:nth-child(3) { transform: rotateY(-2deg); }
  .project-card:hover {
    transform: rotateY(0deg) translateZ(20px) scale(1.03);
    box-shadow: 0 30px 60px rgba(0,0,0,0.2);
    z-index: 2;
  }
  .project-card-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .project-card:hover .project-card-bg { transform: scale(1.08); }
  .project-card:nth-child(1) .project-card-bg {
    background-position: center; background-size: cover; background-repeat: no-repeat;
  }
  .project-card:nth-child(2) .project-card-bg {
    background-position: center; background-size: cover; background-repeat: no-repeat;
  }
  .project-card:nth-child(3) .project-card-bg {
    background-position: center; background-size: cover; background-repeat: no-repeat;
  }
  .project-card-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(180deg, transparent 40%, rgba(26,35,50,0.85) 100%);
  }
  .project-card-content {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 2rem;
    z-index: 2;
  }
  .project-card-tag {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--blue);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
  }
  .project-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1.3;
  }
  .project-card-line {
    width: 32px; height: 2px;
    background: var(--blue);
    margin-top: 1rem;
    transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .project-card:hover .project-card-line { width: 64px; }

  /* Grid pattern overlay for project cards */
  .project-card-pattern {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
      radial-gradient(circle at 20% 80%, rgba(106,184,238,0.08) 0%, transparent 50%);
    pointer-events: none;
  }

  /* ── Technologies ── */
  .tech {
    padding: 7rem 0;
    background: var(--dark);
    position: relative;
    overflow: hidden;
  }
  .tech::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(ellipse at 20% 50%, rgba(106,184,238,0.05) 0%, transparent 60%);
  }
  .tech .section-title { color: var(--white); }
  .tech-subtitle {
    font-size: 1rem;
    color: rgba(255,255,255,0.4);
    margin-top: 0.75rem;
    max-width: 420px;
  }
  .tech-head { margin-bottom: 4rem; }
  .tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(255,255,255,0.06);
    position: relative;
  }
  .tech-grid {
    perspective: 1200px;
  }
  .tech-item {
    background: var(--dark);
    padding: 2.5rem 1.5rem;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    transform-style: preserve-3d;
  }
  .tech-item:hover {
    background: var(--dark-soft);
    transform: translateZ(16px) scale(1.04);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    z-index: 2;
  }
  .tech-item-icon {
    width: 36px; height: 36px;
    margin: 0 auto 1rem;
    stroke: var(--blue);
    fill: none;
    stroke-width: 1.5;
  }
  .tech-item h4 {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.04em;
    margin-bottom: 0.4rem;
  }
  .tech-item p {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.35);
  }

  /* ── Contact ── */
  .contact {
    padding: 7rem 0;
    background: var(--light);
  }
  .contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    margin-top: 4rem;
  }
  .contact-info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
  }
  .contact-info-icon {
    width: 20px; height: 20px;
    stroke: var(--blue);
    fill: none;
    stroke-width: 1.5;
    flex-shrink: 0;
    margin-top: 2px;
  }
  .contact-info-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--mid);
    margin-bottom: 0.3rem;
  }
  .contact-info-value {
    font-size: 1rem;
    color: var(--dark);
  }
  .contact-info-value a {
    color: var(--dark);
    text-decoration: none;
    transition: color 0.2s;
  }
  .contact-info-value a:hover { color: var(--blue); }

  .contact-form { display: flex; flex-direction: column; gap: 1.25rem; }
  .form-field {
    position: relative;
  }
  .form-field input,
  .form-field textarea {
    width: 100%;
    font-family: 'PT Sans', sans-serif;
    font-size: 0.95rem;
    padding: 1rem 0;
    border: none;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    background: transparent;
    color: var(--dark);
    outline: none;
    transition: border-color 0.3s;
    resize: none;
  }
  .form-field input:focus,
  .form-field textarea:focus {
    border-bottom-color: var(--blue);
  }
  .form-field input::placeholder,
  .form-field textarea::placeholder {
    color: var(--mid);
  }
  .btn-submit {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--white);
    background: var(--dark);
    border: none;
    padding: 1rem 2.5rem;
    cursor: pointer;
    align-self: flex-start;
    transition: all 0.35s;
    margin-top: 0.5rem;
  }
  .btn-submit:hover {
    background: var(--blue);
    box-shadow: 0 8px 32px rgba(106,184,238,0.25);
    transform: translateY(-2px);
  }

  /* ── Footer ── */
  .footer {
    background: var(--dark);
    padding: 3rem 0;
    border-top: 1px solid rgba(255,255,255,0.04);
  }
  .footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
  }
  .footer-copy {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.35);
  }
  .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  .footer-logo img {
    height: 30px;
    opacity: 0.5;
  }
  .footer-logo-text {
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.25);
  }
  .footer-links {
    display: flex;
    gap: 1.5rem;
  }
  .footer-links a {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.35);
    text-decoration: none;
    transition: color 0.2s;
  }
  .footer-links a:hover { color: var(--blue); }

  /* ── Responsive ── */
  @media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-visual { height: 300px; }
  }

  @media (max-width: 768px) {
    .topbar { display: none; }
    .nav { display: none; }
    .nav.open {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: 72px; left: 0; right: 0;
      background: var(--white);
      padding: 2rem;
      gap: 1.25rem;
      border-bottom: 1px solid rgba(0,0,0,0.06);
      box-shadow: 0 12px 32px rgba(0,0,0,0.08);
    }
    .burger { display: flex; }
    .logo-block { left: 1.5rem !important; width: 80px; padding: 12px 8px 10px; }
    .logo-block img { height: 36px; }
    .logo-block-name { font-size: 0.7rem; }
    .logo-spacer { width: 90px; }
    .hero { min-height: 80vh; }
    .hero h1 { font-size: 2.4rem; }
    .hero-schematic { display: none; }
    .hero-readout { display: none; }
    .services-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .project-card { height: 280px; }
    .tech-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .stat-value { font-size: 1.6rem; }
    .footer .container { flex-direction: column; text-align: center; }
  }

  @media (max-width: 480px) {
    .about-stats { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
  }