:root{
    --navy:#071E3A;        /* Deep Optics Navy */
    --navy-2:#06172D;      /* Instrument Navy */
    --copper:#C46A32;      /* Copper Beam */
    --copper-bright:#E08A4C;
    --white:#F7F8FA;       /* Lab White */
    --gray:#6F7785;        /* Engineering Gray */
    --line:#D8DDE4;
    --font:'Avenir Next','Avenir','Helvetica Neue','Segoe UI',Helvetica,Arial,sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:var(--font);color:var(--navy);background:var(--white);line-height:1.65}

  /* ===== NAV ===== */
  nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(6,23,45,.94);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:space-between;padding:0 5%;height:66px;border-bottom:1px solid rgba(196,106,50,.35)}
  .brand{display:flex;align-items:center;gap:.8rem;text-decoration:none}
  .brand svg{height:38px;width:auto}
  .logo-img{height:34px;width:auto;display:block}
  footer .logo-img{height:30px}
  .wordmark{color:#F7F8FA;font-size:1.02rem;font-weight:500;letter-spacing:.46em;font-family:'Avenir Next','Avenir','Century Gothic','Futura','Helvetica Neue',sans-serif}
  .lam{display:inline-block;transform:rotate(180deg);letter-spacing:0}
  .nav-links{display:flex;gap:2.2rem;list-style:none}
  .nav-links a{color:#B9C2CE;text-decoration:none;font-size:.9rem;letter-spacing:.22em;text-transform:uppercase;transition:color .2s}
  .nav-links a:hover{color:var(--copper-bright)}
  .nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px 2px}
  .nav-toggle span{display:block;width:24px;height:2px;background:#F7F8FA;margin:5px 0;transition:transform .2s,opacity .2s}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media(max-width:760px){
    .nav-toggle{display:block}
    .nav-links{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;background:rgba(6,23,45,.97);backdrop-filter:blur(10px);border-bottom:1px solid rgba(196,106,50,.35);padding:.4rem 0 .8rem}
    .nav-links.open{display:flex}
    .nav-links a{display:block;padding:.95rem 6%;font-size:1.05rem;letter-spacing:.18em}
  }

  /* ===== HERO ===== */
  header{position:relative;min-height:96vh;display:flex;align-items:center;padding:130px 5% 110px;overflow:hidden;color:#F7F8FA;background:var(--navy-2)}
  .hero-photo{position:absolute;inset:0;background:url(images/banner.jpg) center right / cover no-repeat;pointer-events:none}
  .hero-overlay{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg, rgba(6,23,45,.9) 0%, rgba(6,23,45,.6) 42%, rgba(6,23,45,.08) 72%, rgba(6,23,45,0) 100%),linear-gradient(0deg, rgba(6,23,45,.55) 0%, rgba(6,23,45,0) 30%)}
  .hero-inner{position:relative;z-index:2;max-width:1250px;margin:0 auto;width:100%}
  .hero-kicker{display:flex;align-items:center;gap:1rem;color:var(--copper-bright);font-size:1rem;letter-spacing:.4em;text-transform:uppercase;margin-bottom:1.6rem}
  .hero-kicker::before{content:"";width:46px;height:1px;background:var(--copper)}
  header h1{font-size:clamp(2rem,4.2vw,3.3rem);font-weight:600;line-height:1.3;letter-spacing:.01em;white-space:nowrap}
  @media(max-width:640px){header h1{white-space:normal}}
  header h1 span{color:var(--copper-bright)}
  .hero-sub{margin-top:1.6rem;font-size:clamp(1.08rem,2vw,1.3rem);color:#AEB9C6;max-width:640px;font-weight:400}
  .hero-tag{margin-top:2.6rem;display:flex;align-items:center;gap:1.1rem;color:var(--copper-bright);font-size:.8rem;letter-spacing:.5em;text-transform:uppercase}
  .hero-tag::before,.hero-tag::after{content:"";height:1px;width:56px;background:var(--copper)}
  .hero-cta{margin-top:2.8rem;display:flex;gap:1rem;flex-wrap:wrap}
  .btn{display:inline-block;padding:1rem 2.6rem;font-size:.92rem;font-weight:600;letter-spacing:.25em;text-transform:uppercase;text-decoration:none;transition:all .18s ease;border:1px solid transparent}
  .btn-primary{background:var(--copper);color:#fff;clip-path:polygon(0 0,calc(100% - 14px) 0,100% 100%,14px 100%)}
  .btn-primary:hover{background:var(--copper-bright)}
  .btn-ghost{border-color:rgba(247,248,250,.4);color:#F7F8FA}
  .btn-ghost:hover{border-color:var(--copper-bright);color:var(--copper-bright)}

  /* keyword strip */
  .kw-strip{background:var(--navy);border-top:1px solid rgba(196,106,50,.3);border-bottom:1px solid rgba(196,106,50,.3);padding:1.1rem 5%;display:flex;flex-wrap:wrap;justify-content:center;gap:2.6rem}
  .kw{display:flex;align-items:center;gap:.6rem;color:#8E9BAB;font-size:.72rem;letter-spacing:.28em;text-transform:uppercase}
  .kw svg{width:18px;height:18px;stroke:var(--copper);fill:none;stroke-width:1.5}

  /* ===== SECTIONS ===== */
  section{padding:96px 5%}
  .section-head{max-width:1150px;margin:0 auto}
  .section-label{display:flex;align-items:center;gap:.9rem;color:var(--copper);font-size:.95rem;letter-spacing:.4em;text-transform:uppercase;font-weight:600;margin-bottom:1rem}
  .section-label::before{content:"";width:34px;height:1px;background:var(--copper)}
  h2{font-size:clamp(1.9rem,3.8vw,2.8rem);font-weight:600;line-height:1.2;letter-spacing:.01em}
  .lead{margin-top:1.1rem;font-size:1.15rem;color:var(--gray);max-width:740px}

  /* MISSION */
  .mission{background:var(--white)}
  .mission-grid{max-width:860px;margin:0 auto}
  @media(max-width:880px){.mission-grid{grid-template-columns:1fr;gap:3rem}}
  .mission-visual svg{width:100%;height:auto;display:block}

  /* PILLARS */
  .pillars{background:#EEF1F5;position:relative}
  .pillars::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--line)}
  .cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:1.4rem;margin:2.8rem auto 0;max-width:1150px}
  .card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:border-color .2s,transform .2s}
  .card:hover{border-color:var(--copper);transform:translateY(-4px)}
  .card-img{border-bottom:1px solid var(--line);background:var(--navy-2)}
  .card-img svg{width:100%;height:auto;display:block}
  .card-img img{width:100%;height:auto;display:block;aspect-ratio:2/1;object-fit:cover}
  .card-body{padding:1.7rem 1.8rem 2rem}
  .card-num{color:var(--copper);font-size:.85rem;letter-spacing:.3em;margin-bottom:.6rem}
  .card h3{font-size:1.22rem;font-weight:600;letter-spacing:.06em;margin-bottom:.6rem;text-transform:uppercase}
  .card p{color:var(--gray);font-size:1.03rem}

  /* EXPERTISE / KEYWORDS */
  .expertise{background:var(--navy-2);color:#F7F8FA;position:relative;overflow:hidden}
  .expertise h2{color:#F7F8FA}
  .exp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin:2.6rem auto 0;max-width:1150px}
  .exp-item{border:1px solid rgba(247,248,250,.14);padding:1.8rem 1.6rem;transition:border-color .2s,background .2s;background:rgba(247,248,250,.02)}
  .exp-item:hover{border-color:var(--copper);background:rgba(196,106,50,.06)}
  .exp-icon{width:56px;height:56px;margin-bottom:1.2rem}
  .exp-icon svg{width:100%;height:100%}
  .exp-item strong{display:block;color:var(--copper-bright);font-size:1.02rem;letter-spacing:.22em;text-transform:uppercase;margin-bottom:.5rem}
  .exp-item span{color:#9AA6B4;font-size:1rem}
  .exp-global{margin:3rem auto 0;max-width:1150px;display:flex;align-items:center;gap:1.2rem;color:#8E9BAB;font-size:.78rem;letter-spacing:.35em;text-transform:uppercase}
  .exp-global::before{content:"";width:46px;height:1px;background:var(--copper)}
  .exp-global b{color:#F7F8FA;font-weight:600}

  /* CONTACT */
  .contact{background:var(--white)}
  .contact-wrap{max-width:620px;margin:0 auto}
  form{margin-top:2.4rem;display:grid;gap:1rem}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
  @media(max-width:560px){.form-row{grid-template-columns:1fr}}
  input,textarea{width:100%;padding:1rem 1.15rem;border:1px solid var(--line);background:#fff;font-size:1.02rem;font-family:inherit;transition:border-color .2s;border-radius:0}
  input:focus,textarea:focus{outline:none;border-color:var(--copper)}
  textarea{min-height:140px;resize:vertical}
  .form-submit{background:var(--navy);color:#fff;border:none;padding:1.1rem;font-size:.95rem;font-weight:600;letter-spacing:.3em;text-transform:uppercase;cursor:pointer;transition:background .2s}
  .form-submit:hover{background:var(--copper)}
  .form-note{font-size:.88rem;color:var(--gray);text-align:center}
  .thanks{display:none;margin-top:2rem;padding:1.6rem;border:1px solid var(--copper);color:var(--navy);font-weight:600;text-align:center}

  /* FOOTER */
  footer{background:var(--navy-2);color:#7E8B9A;padding:2.6rem 5%;font-size:.9rem;border-top:1px solid rgba(196,106,50,.35)}
  .footer-inner{max-width:1150px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;flex-wrap:wrap}
  .footer-brand{display:flex;align-items:center;gap:.7rem}
  .footer-brand svg{height:30px;width:auto}
  .footer-brand .wordmark{font-size:.85rem}
  .footer-tag{letter-spacing:.3em;text-transform:uppercase;color:var(--copper);font-size:.8rem}