:root {
    --orange: #E8521A;
    --orange-dark: #C94210;
    --orange-dim: rgba(232, 82, 26, 0.1);
    --orange-glow: rgba(232, 82, 26, 0.2);
    --navy: #0F2444;
    --navy-dark: #091830;
    --navy-dim: rgba(15, 36, 68, 0.07);
    --bg: #F7F6F3;
    --bg-card: #FFFFFF;
    --bg-elevated: #EEECEA;
    --border: rgba(15, 36, 68, 0.14);
    --border-subtle: rgba(0, 0, 0, 0.07);
    --text-primary: #0F2444;
    --text-secondary: #4A5568;
    --text-muted: #9AA5B1;
    --font-display: 'Syne', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;

    /* Legacy --cyan mapped to orange accent */
    --cyan: var(--orange);
    --cyan-dim: var(--orange-dim);
    --cyan-glow: var(--orange-glow);
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  /* ─── CANVAS BACKGROUND ─── */
  #bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.5;
  }

  /* ─── NOISE OVERLAY ─── */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 180px;
    opacity: 0.4;
  }

  /* ─── NAV ─── */
  nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 5%;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(247, 246, 243, 0.94);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
  }

  .nav-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .nav-logo span {
    color: var(--cyan);
  }

  .nav-logo-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 12px var(--cyan);
    animation: pulse-dot 2s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--cyan); }
    50% { opacity: 0.6; box-shadow: 0 0 3px var(--cyan); }
  }

  .nav-links {
    display: flex;
    gap: 36px;
    list-style: none;
  }

  .nav-links a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
  }

  .nav-links a:hover { color: var(--cyan); }

  .nav-cta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--orange);
    text-decoration: none;
    border: 1.5px solid var(--orange);
    padding: 8px 20px;
    border-radius: 4px;
    transition: all 0.2s;
    background: var(--orange-dim);
  }

  .nav-cta:hover {
    background: var(--orange);
    color: #FFFFFF;
    box-shadow: 0 4px 16px var(--orange-glow);
  }

  /* ─── HERO ─── */
  .hero {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 5%;
    padding-top: 72px;
  }

  .hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 28px;
    opacity: 0;
    animation: fade-up 0.8s ease forwards 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hero-eyebrow::before {
    content: '';
    display: inline-block;
    width: 32px;
    height: 1px;
    background: var(--cyan);
  }

  .hero-headline {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(3rem, 7vw, 6.5rem);
    line-height: 0.95;
    letter-spacing: -0.03em;
    max-width: 900px;
    opacity: 0;
    animation: fade-up 0.8s ease forwards 0.4s;
  }

  .hero-headline .accent { color: var(--cyan); }

  .hero-headline .line-2 {
    display: block;
    color: var(--text-secondary);
    font-weight: 600;
  }

  .hero-sub {
    margin-top: 32px;
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 540px;
    line-height: 1.7;
    opacity: 0;
    animation: fade-up 0.8s ease forwards 0.6s;
  }

  .hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 48px;
    opacity: 0;
    animation: fade-up 0.8s ease forwards 0.8s;
    flex-wrap: wrap;
  }

  .btn-primary {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #FFFFFF;
    background: var(--orange);
    padding: 14px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    box-shadow: 0 4px 20px var(--orange-glow);
  }

  .btn-primary:hover {
    background: var(--orange-dark);
    box-shadow: 0 8px 32px rgba(232, 82, 26, 0.35);
    transform: translateY(-1px);
  }

  .btn-secondary {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--navy);
    background: transparent;
    padding: 14px 32px;
    border-radius: 4px;
    text-decoration: none;
    border: 1.5px solid var(--border);
    transition: all 0.2s;
  }

  .btn-secondary:hover {
    background: var(--navy-dim);
    border-color: var(--navy);
  }

  .hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 80px;
    padding-top: 48px;
    border-top: 1px solid var(--border-subtle);
    opacity: 0;
    animation: fade-up 0.8s ease forwards 1s;
    flex-wrap: wrap;
  }

  .stat-item {}

  .stat-value {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
  }

  .stat-value span { color: var(--cyan); }

  .stat-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 6px;
  }

  /* ─── SECTION COMMON ─── */
  section {
    position: relative;
    z-index: 2;
    padding: 120px 5%;
  }

  .section-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .section-label::before {
    content: '//';
    opacity: 0.5;
  }

  .section-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2rem, 4vw, 3.2rem);
    letter-spacing: -0.03em;
    line-height: 1.05;
    max-width: 640px;
  }

  .section-title .accent { color: var(--cyan); }

  /* ─── SERVICES ─── */
  #services {
    background: linear-gradient(180deg, transparent 0%, rgba(232, 82, 26, 0.03) 50%, transparent 100%);
  }

  .services-header {
    margin-bottom: 48px;
  }

  .services-header .section-title {
    max-width: 520px;
  }

  .services-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 580px;
    line-height: 1.7;
    margin-top: 16px;
  }

  .services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 16px;
  }

  .service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 28px 28px 24px;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .service-card:hover {
    border-color: var(--border);
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.08), 0 0 0 1px rgba(15, 36, 68, 0.12);
  }

  .service-card.featured {
    border-color: var(--border);
    background: linear-gradient(145deg, #FFFFFF 0%, #FDF0EA 100%);
    border-color: rgba(232, 82, 26, 0.2);
  }

  .service-card.featured::after {
    content: 'Core Service';
    position: absolute;
    top: -1px;
    right: 24px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #FFFFFF;
    background: var(--orange);
    padding: 3px 10px;
    border-radius: 0 0 6px 6px;
  }

  .service-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--cyan-dim);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 16px;
    transition: box-shadow 0.25s, background 0.25s;
    flex-shrink: 0;
  }

  .service-card:hover .service-icon-wrap {
    box-shadow: 0 0 20px rgba(27, 58, 107, 0.15);
    background: var(--navy-dim);
  }

  .service-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.98rem;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.2;
  }

  .service-desc {
    font-size: 0.84rem;
    color: var(--text-secondary);
    line-height: 1.65;
    flex: 1;
  }

  .service-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 16px 0;
  }

  .service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .tag {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--cyan);
    background: var(--cyan-dim);
    border: 1px solid var(--border);
    padding: 3px 9px;
    border-radius: 3px;
  }

  /* ─── WHY AD2LAB ─── */
  #why {
    border-top: 1px solid var(--border-subtle);
  }

  .why-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-top: 64px;
  }

  .why-points {
    display: flex;
    flex-direction: column;
    gap: 32px;
  }

  .why-point {
    display: flex;
    gap: 20px;
    align-items: flex-start;
  }

  .why-point-num {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--cyan);
    letter-spacing: 0.1em;
    padding-top: 4px;
    flex-shrink: 0;
  }

  .why-point-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
  }

  .why-point-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
  }

  .why-visual {
    position: relative;
    aspect-ratio: 1;
    max-width: 440px;
  }

  .why-visual-inner {
    width: 100%;
    height: 100%;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 12px;
    background: #0D1520;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    overflow: hidden;
  }

  .why-visual-inner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 60% 40%, rgba(0,212,255,0.06) 0%, transparent 60%);
    pointer-events: none;
  }

  .code-line {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.8;
    color: var(--text-muted);
  }

  .code-line .k { color: #7B9FBF; }
  .code-line .s { color: #7ECBA0; }
  .code-line .f { color: var(--cyan); }
  .code-line .c { color: #5A7A9A; }
  .code-line .v { color: #F0A868; }
  .code-line .n { color: var(--text-secondary); }

  .code-cursor {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--cyan);
    vertical-align: middle;
    animation: blink 1.1s step-end infinite;
    margin-left: 2px;
  }

  @keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
  }

  /* ─── PROCESS ─── */
  #process {
    border-top: 1px solid var(--border-subtle);
  }

  .process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    overflow: hidden;
    margin-top: 64px;
  }

  .process-step {
    background: var(--bg-card);
    padding: 36px 28px;
    position: relative;
    overflow: hidden;
  }

  .process-step::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    opacity: 0;
    transition: opacity 0.3s;
  }

  .process-step:hover::after { opacity: 1; }

  .step-num {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--border);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 20px;
    transition: color 0.3s;
  }

  .process-step:hover .step-num { color: var(--cyan-dim); }

  .step-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 10px;
  }

  .step-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.65;
  }

  /* ─── CONTACT ─── */
  #contact {
    border-top: 1px solid var(--border-subtle);
  }

  .contact-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
  }

  .contact-left .section-title { max-width: 440px; }

  .contact-detail {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
  }

  .contact-item-icon {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: var(--cyan-dim);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
  }

  .contact-item-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
  }

  .contact-item-value {
    font-size: 0.95rem;
    color: var(--text-secondary);
  }

  .contact-item-value a {
    color: var(--cyan);
    text-decoration: none;
  }

  .contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 40px;
  }

  .form-group {
    margin-bottom: 20px;
  }

  .form-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
  }

  .form-input,
  .form-select,
  .form-textarea {
    width: 100%;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    -webkit-appearance: none;
  }

  .form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2300D4FF' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
  }

  .form-textarea {
    resize: vertical;
    min-height: 110px;
  }

  .form-input:focus,
  .form-select:focus,
  .form-textarea:focus {
    border-color: var(--orange);
    box-shadow: 0 0 0 3px var(--orange-dim);
  }

  .form-input::placeholder,
  .form-textarea::placeholder {
    color: var(--text-muted);
  }

  .form-submit {
    width: 100%;
    background: var(--orange);
    color: #FFFFFF;
    border: none;
    border-radius: 6px;
    padding: 14px 24px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 20px var(--orange-glow);
    margin-top: 4px;
  }

  .form-submit:hover {
    background: var(--orange-dark);
    box-shadow: 0 8px 32px rgba(232, 82, 26, 0.35);
    transform: translateY(-1px);
  }

  /* ─── FOOTER ─── */
  footer {
    position: relative;
    z-index: 2;
    padding: 40px 5%;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
  }

  .footer-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
  }

  .footer-logo span { color: var(--cyan); }

  .footer-copy {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
  }

  .footer-links {
    display: flex;
    gap: 24px;
    list-style: none;
  }

  .footer-links a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
  }

  .footer-links a:hover { color: var(--cyan); }

  /* ─── ANIMATIONS ─── */
  @keyframes fade-up {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ─── SCROLLBAR ─── */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

  /* ─── RESPONSIVE ─── */
  @media (max-width: 900px) {
    .why-grid, .contact-inner { grid-template-columns: 1fr; gap: 48px; }
    .why-visual { display: none; }
    .process-steps { grid-template-columns: 1fr 1fr; }
    .nav-links { display: none; }
    .hero-stats { gap: 32px; }
  }

  @media (max-width: 540px) {
    .process-steps { grid-template-columns: 1fr; }
    .services-header { flex-direction: column; }
  }

  /* ─── GLOW LINE ─── */
  .glow-line {
    display: block;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--cyan) 30%, var(--cyan) 70%, transparent 100%);
    opacity: 0.3;
    margin: 0;
  }

  /* ─── BADGE ─── */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--cyan);
    background: var(--cyan-dim);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 20px;
  }

  .badge-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--cyan);
    animation: pulse-dot 2s ease-in-out infinite;
  }