/* ============================================================
   index.css — homepage-specific sections only
   Load after: base.css → menu.css
   (design tokens + reset live in base.css; header in menu.css)
   ============================================================ */

  /* ============ HERO ============ */
  .hero{
    position:relative;overflow:hidden;border-bottom:1px solid var(--line);
    background:radial-gradient(circle at 75% 50%, #020805 0%, #06140e 42%, #0e2a20 100%);
  }
  /* endless 3D tunnel — rendered with p5 (see script) */
  .hero-tunnel{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
  /* left-side gradient overlay so the hero text stays readable over the animation */
  .hero::before{
    content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
    background:linear-gradient(90deg, rgba(2,8,5,.85) 0%, rgba(2,8,5,.55) 32%, rgba(2,8,5,0) 62%);
  }
  .hero-tunnel canvas{display:block;width:100%!important;height:100%!important}
  .hero-split{
    position:relative;z-index:2;
    display:flex;align-items:center;
    min-height:64vh;padding-top:80px;padding-bottom:80px;
  }
  .hero-left{max-width:780px}
  .hero-eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:24px}
  .hero-eyebrow .lbl{color:#cfe6db}
  .hero-eyebrow .ln{height:1px;width:54px;background:rgba(255,255,255,.5)}
  .hero h1{
    color:#fff;font-weight:800;letter-spacing:-.015em;line-height:1.02;
    font-size:clamp(36px,4.4vw,62px);max-width:16ch;text-wrap:balance;
    text-shadow:0 2px 24px rgba(4,12,18,.65);
  }
  .hero-sub{text-shadow:0 1px 14px rgba(4,12,18,.55)}
  .hero h1 em{font-style:normal;color:#cfe6db}
  .hero-sub{
    color:rgba(255,255,255,.82);font-size:clamp(15px,1.2vw,17px);max-width:54ch;margin-top:26px;line-height:1.65;font-weight:400;
  }
  .hero-actions{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap}
  .btn{
    display:inline-flex;align-items:center;gap:10px;padding:15px 26px;font-size:13px;font-weight:700;
    letter-spacing:.06em;text-transform:uppercase;transition:transform .2s,background .2s,border-color .2s,color .2s;
  }
  .btn svg{width:16px;height:16px}
  .btn-primary{background:#fff;color:var(--ink)}
  .btn-primary svg{stroke:var(--ink)}
  .btn-primary:hover{transform:translateY(-2px);background:var(--steel);color:#fff}
  .btn-primary:hover svg{stroke:#fff}
  .btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
  .btn-ghost svg{stroke:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
  /* hero buttons on steel background */
  .hero .btn-primary:hover{background:var(--steel-dark);color:#fff}
  .hero .btn-primary:hover svg{stroke:#fff}
  @media(max-width:860px){
    .hero-split{min-height:0;padding-top:56px;padding-bottom:56px}
    .hero-left{max-width:none}
    .hero h1{font-size:clamp(34px,9vw,52px)}
  }

  /* ============ SECTION FRAME ============ */
  section.block{padding:120px 0;position:relative}
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:64px}
  .sec-head .index{font-family:var(--mono);font-size:13px;color:var(--steel);letter-spacing:.16em;display:block;margin-bottom:18px}
  .sec-head h2{font-size:clamp(28px,3.6vw,48px);font-weight:800;letter-spacing:-.01em;line-height:1.05;max-width:18ch}
  .sec-head p{max-width:42ch;color:var(--ink-soft);font-size:16px;line-height:1.6}
  @media(max-width:860px){.sec-head{flex-direction:column;align-items:flex-start;gap:24px}}

  /* ============ INTRO ============ */
  .intro{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .intro-top{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
  .intro-lead{font-size:clamp(22px,2.5vw,32px);font-weight:600;line-height:1.34;letter-spacing:-.01em}
  .intro-lead b{color:var(--steel);font-weight:700}
  .intro-figure img{display:block;width:100%;height:100%;max-height:460px;object-fit:cover;box-shadow:0 34px 70px -34px rgba(22,30,34,.55)}
  .intro-cols{display:grid;grid-template-columns:1fr 1fr;gap:64px;margin-top:56px;padding-top:48px;border-top:1px solid var(--line)}
  .intro-cols p{color:var(--ink-soft);font-size:16px;line-height:1.72}
  @media(max-width:920px){.intro-top{grid-template-columns:1fr;gap:36px}.intro-figure{order:-1}.intro-cols{grid-template-columns:1fr;gap:32px;margin-top:40px;padding-top:36px}}

  /* ============ EQUIPMENT (teaser) ============ */
  .equip{background:var(--concrete)}
  .equip-grid{grid-template-columns:repeat(3,1fr);margin-bottom:48px}  /* + .cell-grid */
  .equip-item{display:flex;align-items:center;gap:18px;background:var(--white);padding:22px 24px;position:relative;overflow:hidden;transition:background .3s}
  .equip-item::after{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:var(--steel);transition:width .4s}
  .equip-item:hover{background:var(--concrete)}
  .equip-item:hover::after{width:100%}
  .equip-item img{flex:none;height:54px;width:62px;object-fit:contain;object-position:center;transition:transform .35s}
  .equip-item:hover img{transform:scale(1.06)}
  .equip-item .eq-tx b{display:block;font-size:16px;font-weight:700;letter-spacing:-.01em;line-height:1.25}
  .equip-item .eq-tx span{display:block;font-family:var(--mono);font-size:11px;color:var(--ink-soft);margin-top:7px;text-transform:uppercase;letter-spacing:.05em}
  .equip-foot{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
  .equip-foot p{color:var(--ink-soft);font-size:16px;max-width:54ch;line-height:1.6}
  .equip .btn-primary{background:var(--steel);color:#fff}
  .equip .btn-primary svg{stroke:#fff}
  .equip .btn-primary:hover{background:var(--steel-deep);transform:translateY(-2px)}
  @media(max-width:860px){.equip-grid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:540px){.equip-grid{grid-template-columns:1fr}}

  /* ============ ACCESS & TRAINING (dark, grid) ============ */
  .access{background:var(--steel-dark);color:#e6eee9;position:relative;overflow:hidden}
  .access::before{content:"";position:absolute;inset:0;background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
    background-size:54px 54px;}
  .access .wrap{position:relative;z-index:2}
  .access .sec-head .index{color:#8fbcaa}
  .access .sec-head h2{color:#fff}
  .access-lead{max-width:92ch;font-size:clamp(17px,1.5vw,20px);line-height:1.65;color:#aec4ba;margin-bottom:56px}
  .promo-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
  .promo{
    background:var(--concrete);
    border:1px solid var(--line);
    box-shadow:0 28px 56px -22px rgba(0,0,0,.62);
    padding:40px 36px;position:relative;overflow:hidden;
    display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s;
  }
  .promo:hover{
    transform:translateY(-8px);
    box-shadow:0 44px 80px -22px rgba(0,0,0,.72);
  }
  .promo .ic{
    width:56px;height:56px;display:grid;place-items:center;
    background:var(--white);position:relative;z-index:1;
  }
  /* the icon's white background expands to wash the whole tile on hover */
  .promo .ic::after{
    content:"";position:absolute;inset:0;background:var(--white);z-index:-1;
    transform-origin:center;transition:transform .85s cubic-bezier(.2,.7,.2,1);
  }
  .promo:hover .ic::after{transform:scale(42)}
  .promo .ic svg{width:28px;height:28px;stroke:var(--steel);position:relative;z-index:1}
  .promo .no{position:absolute;top:34px;right:36px;z-index:2;font-family:var(--mono);font-size:12px;color:var(--line);font-weight:600;letter-spacing:.1em}
  .promo h3{position:relative;z-index:2;font-size:22px;font-weight:700;margin-top:26px;letter-spacing:-.01em;color:var(--ink)}
  .promo p{position:relative;z-index:2;color:var(--ink-soft);font-size:15px;line-height:1.65;margin-top:12px}
  .promo-subs{position:relative;z-index:2;margin-top:28px;display:flex;flex-direction:column;gap:10px;align-items:flex-start}
  .promo-link{
    display:inline-flex;align-items:center;gap:9px;
    font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:700;
    color:var(--steel);background:transparent;border:1px solid var(--line);
    padding:11px 16px;transition:background .25s,border-color .25s,color .25s;
  }
  .promo-link:hover{background:var(--steel);border-color:var(--steel);color:#fff}
  .promo-link svg{width:15px;height:15px;stroke:currentColor;transition:transform .25s}
  .promo-link:hover svg{transform:translateX(4px)}
  @media(max-width:760px){.promo-grid{grid-template-columns:1fr}.promo{padding:34px 28px}}

  /* ============ CONTACT ============ */
  .contact{background:var(--white);border-top:1px solid var(--line)}
  .contact-crumb{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:30px}
  .contact-crumb span{color:var(--line);margin:0 8px}
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px}
  .contact address{font-style:normal;font-size:17px;line-height:1.7;color:var(--ink-soft);margin-top:8px}
  .contact address b{color:var(--ink);font-weight:700;font-size:18px}
  .meta-row{display:flex;flex-wrap:wrap;gap:30px;margin-top:30px;padding-top:26px;border-top:1px solid var(--line)}
  .meta-row .k{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--steel)}
  .meta-row .v{display:block;font-family:var(--mono);font-size:14px;margin-top:6px;font-weight:500}
  .map-link{display:inline-block;margin-top:28px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--steel);font-weight:600;transition:color .2s}
  .map-link:hover{color:var(--steel-deep)}
  .contact-cards{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line)}
  .cc{background:var(--white);padding:28px 30px}
  .cc h4{font-size:16px;font-weight:700;letter-spacing:-.01em}
  .cc p{font-size:15px;color:var(--ink-soft);margin-top:12px;display:flex;gap:12px;align-items:baseline}
  .cc p .k{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);min-width:134px;flex:none}
  .cc a:hover{color:var(--steel)}
  .cc-link{display:inline-block;margin-top:18px;font-family:var(--mono);font-size:12px;color:var(--steel);font-weight:600;letter-spacing:.05em;transition:color .2s}
  .cc-link:hover{color:var(--steel-deep)}
  @media(max-width:860px){.contact-grid{grid-template-columns:1fr;gap:40px}.cc p{flex-direction:column;gap:4px}.cc p .k{min-width:0}}

  /* ============ INFRASTRUCTURE ============ */
  .infra{background:var(--steel-dark);color:#e6eee9;position:relative;overflow:hidden}
  .infra::before{content:"";position:absolute;inset:0;background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
    background-size:54px 54px;}
  .infra .wrap{position:relative;z-index:2}
  .infra .sec-head .index{color:#8fbcaa}
  .infra .sec-head h2{color:#fff}
  .infra .sec-head p{color:#aec4ba}
  .infra-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  .ic-card{
    border:1px solid rgba(255,255,255,.14);padding:32px 26px;background:rgba(255,255,255,.02);
    transition:transform .3s,background .3s,border-color .3s;position:relative;
  }
  .ic-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.06);border-color:rgba(143,176,189,.5)}
  .ic-card .ic svg{width:32px;height:32px;stroke:#8fbcaa}
  .ic-card h4{font-size:17px;font-weight:700;margin-top:24px;color:#fff;letter-spacing:-.01em}
  .ic-card p{font-size:13.5px;color:#aec4ba;margin-top:10px;line-height:1.6}
  .ic-card .tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:#7da698;margin-top:18px;display:block;text-transform:uppercase}
  @media(max-width:1000px){.infra-grid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:560px){.infra-grid{grid-template-columns:1fr}}

  /* ============ ZOOM / LOUPE MODULE ============ */
  .zoom{background:var(--white);border-bottom:1px solid var(--line)}
  .zoom-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:70px;align-items:center}
  .zoom-copy h2{font-size:clamp(28px,3.4vw,44px);font-weight:800;letter-spacing:-.01em;line-height:1.06}
  .zoom-copy .index{font-family:var(--mono);font-size:13px;color:var(--steel);letter-spacing:.16em;display:block;margin-bottom:18px}
  .zoom-copy p{color:var(--ink-soft);font-size:16px;line-height:1.7;margin-top:22px;max-width:46ch}
  .zoom-meta{margin-top:30px;border-top:1px solid var(--line);padding-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .zoom-meta div .k{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--steel)}
  .zoom-meta div .v{font-size:15px;font-weight:600;margin-top:5px;font-family:var(--mono)}
  .scope{
    position:relative;aspect-ratio:4/3;background:#0c1418;overflow:hidden;cursor:crosshair;
    border:1px solid var(--line);box-shadow:0 30px 70px -30px rgba(22,30,34,.5);
  }
  .scope canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
  .scope-overlay{position:absolute;inset:0;pointer-events:none;z-index:4}
  .scope-frame i{position:absolute;width:22px;height:22px;border:0 solid rgba(255,255,255,.4)}
  .scope-frame i:nth-child(1){top:14px;left:14px;border-top-width:1px;border-left-width:1px}
  .scope-frame i:nth-child(2){top:14px;right:14px;border-top-width:1px;border-right-width:1px}
  .scope-frame i:nth-child(3){bottom:54px;left:14px;border-bottom-width:1px;border-left-width:1px}
  .scope-frame i:nth-child(4){bottom:54px;right:14px;border-bottom-width:1px;border-right-width:1px}
  .scope-cross{position:absolute;top:50%;left:50%;width:18px;height:18px;transform:translate(-50%,-50%);opacity:.45}
  .scope-cross::before,.scope-cross::after{content:"";position:absolute;background:#fff}
  .scope-cross::before{left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%)}
  .scope-cross::after{top:50%;left:0;right:0;height:1px;transform:translateY(-50%)}
  .databar{
    position:absolute;left:0;right:0;bottom:0;height:40px;z-index:5;
    background:rgba(8,16,20,.78);backdrop-filter:blur(4px);border-top:1px solid rgba(255,255,255,.16);
    display:flex;align-items:center;gap:0;font-family:var(--mono);font-size:11px;color:#cfe6db;letter-spacing:.05em;
  }
  .databar .d{padding:0 16px;display:flex;gap:7px;align-items:baseline;border-right:1px solid rgba(255,255,255,.12)}
  .databar .d:last-child{border:0;margin-left:auto}
  .databar .d b{color:#fff;font-weight:600}
  .databar .d .k{color:#7fac9e}
  /* scale bar */
  .scalebar{display:flex;flex-direction:column;align-items:center;gap:3px;padding:0 16px}
  .scalebar .bar{width:60px;height:5px;border:1px solid #fff;border-top:0;position:relative}
  .scalebar .bar::before,.scalebar .bar::after{content:"";position:absolute;top:-4px;width:1px;height:4px;background:#fff}
  .scalebar .bar::before{left:0}.scalebar .bar::after{right:0}
  .scalebar small{font-size:9px;color:#fff;letter-spacing:.05em}
  /* loupe */
  .loupe{
    position:absolute;width:180px;height:180px;border-radius:50%;pointer-events:none;z-index:6;
    border:2px solid rgba(255,255,255,.9);box-shadow:0 0 0 1px rgba(0,0,0,.5),0 16px 40px -8px rgba(0,0,0,.7),inset 0 0 30px rgba(0,0,0,.35);
    background-repeat:no-repeat;opacity:0;transition:opacity .18s;transform:translate(-50%,-50%);
  }
  .loupe.on{opacity:1}
  .loupe::after{content:"";position:absolute;inset:0;border-radius:50%;
    background:radial-gradient(circle at 32% 28%,rgba(255,255,255,.22),transparent 42%);}
  .loupe-cross{position:absolute;top:50%;left:50%;width:26px;height:26px;transform:translate(-50%,-50%);opacity:.5}
  .loupe-cross::before,.loupe-cross::after{content:"";position:absolute;background:#fff}
  .loupe-cross::before{left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%)}
  .loupe-cross::after{top:50%;left:0;right:0;height:1px;transform:translateY(-50%)}
  .scope-hint{position:absolute;top:16px;left:50%;transform:translateX(-50%);z-index:5;
    font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.7);
    background:rgba(8,16,20,.5);padding:6px 12px;border:1px solid rgba(255,255,255,.18);transition:opacity .3s}
  @media(max-width:920px){.zoom-grid{grid-template-columns:1fr;gap:44px}}

  /* ============ RESEARCH FIELDS ============ */
  .fields{background:var(--concrete-2)}
  .field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
  .field{
    background:var(--concrete);padding:34px 30px;display:flex;align-items:center;gap:20px;
    transition:background .3s,transform .3s;position:relative;
  }
  .field:hover{background:var(--white);transform:translateY(-3px);box-shadow:0 18px 40px -22px rgba(22,30,34,.4)}
  .field .ic{width:48px;height:48px;flex:none;border:1px solid var(--line);display:grid;place-items:center;background:var(--white);transition:background .3s,border-color .3s}
  .field:hover .ic{background:var(--steel);border-color:var(--steel)}
  .field .ic svg{width:24px;height:24px;stroke:var(--steel);transition:stroke .3s}
  .field:hover .ic svg{stroke:#fff}
  .field b{font-size:16px;font-weight:700;letter-spacing:-.01em;display:block}
  .field span{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--ink-soft);text-transform:uppercase}
  @media(max-width:920px){.field-grid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:540px){.field-grid{grid-template-columns:1fr}}

  /* ============ CTA ============ */
  .cta{padding:40px 0}
  .cta .wrap{position:relative;overflow:hidden;background:var(--steel);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:50px;padding:90px 64px}
  .cta .wrap::before{content:"";position:absolute;inset:0;background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;opacity:.6}
  .cta .wrap > *{position:relative;z-index:1}
  .cta h2{font-size:clamp(28px,3.6vw,46px);font-weight:800;line-height:1.06;max-width:16ch;letter-spacing:-.01em}
  .cta p{margin-top:18px;color:rgba(255,255,255,.85);font-size:16px;max-width:46ch;line-height:1.6}
  .cta .btn-primary{background:#fff;color:var(--steel-dark)}
  .cta .btn-primary svg{stroke:var(--steel-dark)}
  .cta .btn-primary:hover{background:var(--steel-dark);color:#fff}
  .cta .btn-primary:hover svg{stroke:#fff}
  @media(max-width:860px){.cta{padding:28px 0}.cta .wrap{flex-direction:column;align-items:flex-start;gap:32px;padding:52px 32px}}

  @media(max-width:600px){section.block{padding:80px 0}.sec-head{margin-bottom:44px}}