:root{
    --black:#0c0c0c;
    --charcoal:#171717;
    --charcoal-2:#232323;
    --paper:#faf9f7;
    --paper-2:#f0efec;
    --line:#2a2a2a;
    --line-light:#dedcd7;
    --orange:#ff5a1f;
    --orange-dim:#d94c17;
    --orange-glow:#ff5a1f33;
    --ink:#111111;
    --ink-soft:#5a5852;
    --white:#ffffff;
    --radius:2px;
    --maxw:1180px;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'Inter',system-ui,sans-serif;
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,.display{
    font-family:'Barlow Condensed',sans-serif;
    font-weight:700;
    letter-spacing:0.01em;
    line-height:1.02;
    margin:0;
    color:var(--black);
  }
  a{color:inherit;text-decoration:none;}
  img,svg{display:block;max-width:100%;}
  button{font-family:inherit;cursor:pointer;}
  ::selection{background:var(--orange);color:var(--white);}
  :focus-visible{outline:2.5px solid var(--orange);outline-offset:3px;}

  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
  @media (max-width:640px){.wrap{padding:0 20px;}}

  /* ---------- header ---------- */
  header{
    position:sticky;top:0;z-index:50;
    background:rgba(12,12,12,0.94);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .headbar{
    display:flex;align-items:center;justify-content:space-between;
    height:74px;
  }
  .logo{
    display:flex;align-items:center;gap:2px;
    font-family:'Barlow Condensed',sans-serif;
    font-weight:800;
    font-size:1.65rem;
    color:var(--white);
    letter-spacing:0.02em;
  }
  .logo-img{height:52px;width:auto;display:block;}
  .logo .z{color:var(--orange);}
  .logo-mark{
    width:9px;height:9px;background:var(--orange);
    display:inline-block;margin-right:9px;
    transform:rotate(45deg);
  }
  nav.mainnav{display:flex;gap:34px;}
  nav.mainnav a{
    color:#c9c7c2;font-size:0.97rem;font-weight:500;
    padding:6px 0;border-bottom:1px solid transparent;
    transition:color .15s ease, border-color .15s ease;
  }
  nav.mainnav a:hover{color:var(--white);border-color:var(--orange);}
  .head-actions{display:flex;align-items:center;gap:16px;}
  .phone-cta{
    display:flex;align-items:center;gap:9px;
    background:var(--orange);color:var(--white);
    padding:10px 18px;
    font-weight:600;font-size:0.94rem;
    border:1px solid var(--orange);
    transition:background .15s ease;
    white-space:nowrap;
  }
  .phone-cta:hover{background:var(--orange-dim);}
  .phone-cta svg{width:16px;height:16px;flex:none;}
  .burger{display:none;background:none;border:none;padding:8px;}
  .burger span{display:block;width:22px;height:2px;background:var(--white);margin:5px 0;}
  #mobnav.open{display:block !important;}

  @media (max-width:900px){
    nav.mainnav{display:none;}
    .burger{display:block;}
  }
  @media (max-width:520px){
    .phone-cta span.txt{display:none;}
    .phone-cta{padding:10px 12px;}
  }

  /* ---------- hero ---------- */
  .hero{
    background:var(--paper-2);
    color:var(--ink);
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line-light);
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.1fr 0.9fr;
    align-items:center;
    gap:40px;
    padding:88px 0 76px;
    position:relative;
  }
  @media (max-width:900px){
    .hero-grid{grid-template-columns:1fr;padding:56px 0 48px;gap:36px;}
  }
  .eyebrow-row{
    display:flex;align-items:center;gap:10px;
    margin-bottom:22px;color:var(--ink-soft);font-size:0.86rem;font-weight:500;
  }
  .eyebrow-row .dot{width:6px;height:6px;background:var(--orange);border-radius:50%;flex:none;}
  .hero h1{
    font-size:clamp(2.6rem, 5.2vw, 4.4rem);
    color:var(--black);
    max-width:14ch;
  }
  .hero h1 em{
    font-style:normal;color:var(--orange);
  }
  .hero p.lede{
    margin-top:24px;
    font-size:1.14rem;
    color:var(--ink-soft);
    max-width:46ch;
    line-height:1.55;
  }
  .hero-actions{
    display:flex;gap:14px;margin-top:38px;flex-wrap:wrap;
  }
  .btn{
    display:inline-flex;align-items:center;gap:10px;
    padding:15px 26px;
    font-weight:600;font-size:0.98rem;
    border:1px solid transparent;
    transition:all .15s ease;
  }
  .btn-primary{background:var(--orange);color:var(--white);}
  .btn-primary:hover{background:var(--orange-dim);}
  .btn-ghost{background:transparent;color:var(--ink);border-color:#c8c6c0;}
  .btn-ghost:hover{border-color:var(--black);}
  .hero-stats{
    display:flex;gap:34px;margin-top:52px;padding-top:28px;border-top:1px solid var(--line-light);
  }
  .hero-stats div b{
    display:block;font-family:'Barlow Condensed';font-size:1.9rem;font-weight:700;color:var(--black);
  }
  .hero-stats div span{font-size:0.84rem;color:var(--ink-soft);}

  /* hero illustration: exploded gear/piston line art */
  .hero-art{position:relative;}
  .hero-art svg{width:100%;height:auto;}
  @media (max-width:900px){.hero-art{order:-1;max-width:340px;margin:0 auto;}}

  /* ---------- section shell ---------- */
  section{padding:96px 0;}
  @media (max-width:640px){section{padding:64px 0;}}
  .sec-head{
    display:flex;justify-content:space-between;align-items:flex-end;
    gap:24px;margin-bottom:52px;
    border-bottom:1px solid var(--line-light);
    padding-bottom:26px;
  }
  @media (max-width:640px){.sec-head{flex-direction:column;align-items:flex-start;gap:10px;}}
  .sec-head h2{font-size:clamp(2rem,3.6vw,2.7rem);max-width:16ch;}
  .sec-head p{color:var(--ink-soft);max-width:38ch;font-size:1.02rem;}
  .tag{
    font-size:0.82rem;color:var(--orange);font-weight:600;
    letter-spacing:0.01em;
  }

  /* ---------- activities ---------- */
  .activities{background:var(--paper);}
  .act-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-light);border:1px solid var(--line-light);}
  @media (max-width:800px){.act-grid{grid-template-columns:1fr;}}
  .act-card{background:var(--white);padding:44px 40px;position:relative;}
  .act-card .num{font-family:'Barlow Condensed';font-size:0.95rem;color:var(--ink-soft);margin-bottom:20px;display:block;}
  .act-card h3{font-size:1.9rem;margin-bottom:14px;}
  .act-card p{color:var(--ink-soft);font-size:1rem;max-width:42ch;margin-bottom:22px;}
  .act-card ul{list-style:none;padding:0;margin:0 0 24px;display:flex;flex-direction:column;gap:10px;}
  .act-card ul li{
    display:flex;align-items:center;gap:10px;font-size:0.95rem;color:var(--ink);
  }
  .act-card ul li svg{width:14px;height:14px;flex:none;color:var(--orange);}
  .act-card.featured{background:var(--white);border-left:3px solid var(--orange);}
  .act-card.featured h3{color:var(--black);}
  .act-card.featured p{color:var(--ink-soft);}
  .act-card.featured .num{color:var(--ink-soft);}
  .act-card.featured ul li{color:var(--ink);}
  .pill{
    display:inline-block;padding:5px 12px;border:1px solid var(--orange);color:var(--orange);
    font-size:0.78rem;font-weight:600;margin-bottom:18px;
  }
  .act-card.featured .link-row a{color:var(--orange-dim);}
  .link-row a{
    font-weight:600;font-size:0.92rem;display:inline-flex;align-items:center;gap:8px;color:var(--ink);
    border-bottom:1px solid currentColor;padding-bottom:2px;
  }

  /* ---------- how it works ---------- */
  .how{background:var(--paper-2);border-top:1px solid var(--line-light);border-bottom:1px solid var(--line-light);}
  .how-note{
    display:flex;gap:14px;align-items:flex-start;
    background:var(--white);border:1px solid var(--line-light);padding:20px 22px;margin-bottom:48px;max-width:640px;
  }
  .how-note svg{width:20px;height:20px;flex:none;color:var(--orange);margin-top:2px;}
  .how-note p{margin:0;font-size:0.95rem;color:var(--ink-soft);}
  .how-note strong{color:var(--ink);}
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
  @media (max-width:800px){.steps{grid-template-columns:1fr;}}
  .step{position:relative;padding-top:20px;}
  .step-num{
    font-family:'Barlow Condensed';font-weight:800;font-size:3.2rem;color:var(--black);
    -webkit-text-stroke:1.4px var(--black);
    opacity:0.9;
  }
  .step h3{font-size:1.4rem;margin:14px 0 10px;}
  .step p{color:var(--ink-soft);font-size:0.95rem;max-width:32ch;}
  .step-line{height:2px;background:var(--orange);width:34px;margin-top:16px;}

  /* ---------- contact / devis ---------- */
  .contact{background:var(--paper-2);color:var(--ink);border-top:1px solid var(--line-light);}
  .contact-grid{display:grid;grid-template-columns:0.95fr 1.05fr;gap:60px;align-items:start;}
  @media (max-width:900px){.contact-grid{grid-template-columns:1fr;gap:40px;}}
  .contact-left h2{color:var(--black);font-size:clamp(2rem,3.6vw,2.6rem);max-width:14ch;margin-bottom:20px;}
  .contact-left p{color:var(--ink-soft);max-width:38ch;margin-bottom:32px;}
  .contact-info{display:flex;flex-direction:column;gap:18px;}
  .contact-info a, .contact-info div{
    display:flex;align-items:center;gap:14px;color:var(--ink);font-size:1.02rem;font-weight:500;
  }
  .contact-info svg{width:18px;height:18px;color:var(--orange);flex:none;}
  .contact-info small{display:block;color:var(--ink-soft);font-weight:400;font-size:0.84rem;margin-top:2px;}

  form.devis{
    background:var(--white);color:var(--ink);
    padding:40px;border:1px solid var(--line-light);
    box-shadow:0 1px 0 var(--line-light);
  }
  @media (max-width:520px){form.devis{padding:28px 22px;}}
  .field-label{
    font-size:0.8rem;font-weight:600;color:var(--ink-soft);margin-bottom:8px;display:block;
  }
  .row2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
  @media (max-width:480px){.row2{grid-template-columns:1fr;}}
  .field{margin-bottom:18px;}
  .field input, .field textarea, .field select{
    width:100%;border:1px solid var(--line-light);background:var(--white);
    padding:12px 14px;font-family:'Inter';font-size:0.96rem;color:var(--ink);
  }
  .field select{
    appearance:none;-webkit-appearance:none;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235a5852' stroke-width='2.4'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right 14px center;background-size:16px;
    padding-right:38px;
  }
  .field select:invalid{color:var(--ink-soft);}
  .field textarea{resize:vertical;min-height:88px;}
  .field input:focus, .field textarea:focus, .field select:focus{outline:none;border-color:var(--orange);}
  .field-conditional{
    max-height:0;opacity:0;margin-bottom:0;overflow:hidden;
    transition:max-height .25s ease, opacity .2s ease, margin-bottom .25s ease;
  }
  .field-conditional.open{max-height:120px;opacity:1;margin-bottom:18px;}
  .devis-submit{
    width:100%;background:var(--orange);color:var(--white);border:none;
    padding:16px;font-weight:700;font-size:1rem;margin-top:6px;
    display:flex;align-items:center;justify-content:center;gap:10px;
    transition:background .15s ease;
  }
  .devis-submit:hover{background:var(--orange-dim);}
  .form-note{font-size:0.8rem;color:var(--ink-soft);margin-top:12px;text-align:center;}
  .devis-success{
    display:none;
    flex-direction:column;align-items:center;text-align:center;gap:16px;
    padding:36px 20px;
  }
  .devis-success.show{display:flex;}
  .devis-success svg{width:46px;height:46px;color:var(--orange);flex:none;}
  .devis-success p{font-size:1.05rem;line-height:1.6;color:var(--ink);max-width:34ch;margin:0;}
  .form-status.err{
    display:none;margin-top:16px;padding:12px 14px;font-size:0.88rem;
    border:1px solid #c0392b;color:#8a2c20;background:#fbeceb;
  }
  .form-status.err.show{display:block;}
  .devis-submit[disabled]{opacity:0.6;cursor:not-allowed;}

  /* ---------- footer ---------- */
  footer{background:var(--charcoal);color:#b8b6b0;padding:56px 0 26px;border-top:1px solid var(--line);}
  .foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;margin-bottom:40px;}
  @media (max-width:760px){.foot-grid{grid-template-columns:1fr;gap:32px;}}
  .foot-logo{margin-bottom:14px;}
  .foot-logo-img{height:60px;width:auto;display:block;}
  footer p{font-size:0.9rem;line-height:1.6;max-width:34ch;}
  footer h4{color:var(--white);font-size:0.85rem;font-weight:600;margin-bottom:16px;letter-spacing:0.02em;}
  footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
  footer ul a{font-size:0.9rem;color:#b8b6b0;transition:color .15s ease;}
  footer ul a:hover{color:var(--orange);}
  .foot-bottom{
    border-top:1px solid #2c2c2c;padding-top:22px;
    display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
    font-size:0.8rem;color:#7a7870;
  }

  .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none;}
    html{scroll-behavior:auto;}
  }