:root{
    --blue:#0066FF;
    --blue-deep:#0033A0;
    --navy:#0B1220;
    --navy-soft:#101a30;
    --grey:#6B7280;
    --offwhite:#F5F7FA;
    --white:#ffffff;
    --line: rgba(11,18,32,0.08);
    --line-dark: rgba(255,255,255,0.10);
    --radius: 14px;
    --maxw: 1220px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:'IBM Plex Sans', sans-serif;
    color:var(--navy);
    background:var(--white);
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block; max-width:100%;}
  a{color:inherit; text-decoration:none;}
  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 32px;}
  h1,h2,h3,h4{font-family:'Space Grotesk', sans-serif; font-weight:600; letter-spacing:-0.01em; color:var(--navy);}
  .mono{font-family:'IBM Plex Mono', monospace;}
  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:12.5px;
    font-weight:500;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--blue);
    display:flex; align-items:center; gap:10px;
  }
  .eyebrow::before{content:""; width:22px; height:1.5px; background:var(--blue);}
  section{padding:96px 0;}
  @media (max-width:720px){ section{padding:64px 0;} .wrap{padding:0 20px;} }

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    font-family:'IBM Plex Sans', sans-serif;
    font-weight:600; font-size:15px;
    padding:14px 26px;
    border-radius:8px;
    cursor:pointer;
    border:1.5px solid transparent;
    transition:all .18s ease;
    white-space:nowrap;
  }
  .btn-primary{ background:var(--blue); color:#fff; }
  .btn-primary:hover{ background:var(--blue-deep); transform:translateY(-1px); }
  .btn-ghost{ border-color:var(--line); color:var(--navy); background:transparent;}
  .btn-ghost:hover{ border-color:var(--blue); color:var(--blue); }
  .btn-ghost-dark{ border-color:var(--line-dark); color:#fff; }
  .btn-ghost-dark:hover{ border-color:var(--blue); color:var(--blue); }

  /* ---------- Header ---------- */
  header{
    position:sticky; top:0; z-index:100;
    background:rgba(255,255,255,0.86);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  header .wrap{display:flex; align-items:center; justify-content:space-between; height:88px;}
  .logo{display:flex; align-items:center; gap:10px;}
  .logo img{height:46px; width:auto;}
  nav{display:flex; align-items:center; gap:36px;}
  nav .navlinks{display:flex; gap:32px;}
  nav a.navlink{font-size:14.5px; font-weight:500; color:var(--navy); opacity:0.75; transition:opacity .15s;}
  nav a.navlink:hover{opacity:1; color:var(--blue);}
  .header-actions{display:flex; align-items:center; gap:14px;}
  .btn-sm{padding:10px 20px; font-size:14px;}
  .menu-toggle{display:none;}
  @media (max-width:900px){
    nav .navlinks{display:none;}
    .header-actions .btn-ghost{display:none;}
  }

  /* ---------- Hero ---------- */
  .hero{
    background:var(--navy);
    color:#fff;
    padding:64px 0 88px;
    overflow:hidden;
    position:relative;
  }
  .hero .wrap{
    display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center;
  }
  @media (max-width:960px){ .hero .wrap{grid-template-columns:1fr;} .hero{padding:48px 0 56px;} }
  .hero-eyebrow{
    font-family:'IBM Plex Mono', monospace; font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
    color:#7fa8ff; display:flex; align-items:center; gap:10px; margin-bottom:22px;
  }
  .hero-eyebrow::before{content:""; width:22px; height:1.5px; background:#7fa8ff;}
  .hero h1{
    font-size:clamp(38px,5vw,58px);
    line-height:1.05;
    color:#fff;
    margin-bottom:22px;
  }
  .hero p.lead{
    font-size:18px; color:#c4cde0; max-width:480px; margin-bottom:26px;
  }
  .hero-tags{ display:flex; gap:22px; margin-bottom:36px; flex-wrap:wrap;}
  .hero-tags span{
    font-family:'IBM Plex Mono', monospace; font-size:13px; color:#fff;
    display:flex; align-items:center; gap:8px;
  }
  .hero-tags span::before{content:""; width:6px; height:6px; border-radius:50%; background:var(--blue);}
  .hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }

  /* ---------- Heatmap signature visual ---------- */
  .heatmap-card{
    position:relative;
    background:radial-gradient(120% 100% at 30% 0%, #131f3a, var(--navy-soft) 60%);
    border:1px solid var(--line-dark);
    border-radius:18px;
    padding:20px;
    box-shadow: 0 30px 80px -20px rgba(0,51,160,0.55);
  }
  .heatmap-topbar{
    display:flex; justify-content:space-between; align-items:center;
    font-family:'IBM Plex Mono', monospace; font-size:11px; color:#8fa2c9;
    margin-bottom:6px; letter-spacing:.06em;
  }
  .heatmap-topbar .dot{width:7px; height:7px; border-radius:50%; background:#2ee6a8; display:inline-block; margin-right:6px; box-shadow:0 0 8px #2ee6a8;}
  .iso-room-img{
    width:100%; height:auto; display:block; border-radius:10px;
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.6);
  }
  .heatmap-legend{
    display:flex; justify-content:space-between; align-items:center;
    margin-top:8px; font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:#8fa2c9;
  }
  .legend-bar{ flex:1; height:5px; margin:0 12px; border-radius:3px;
    background:linear-gradient(to right, #0066FF, #34c759, #ffd60a, #ff9500, #ff3b30);}


  /* ---------- Benefits ---------- */
  .benefits-grid{
    display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:44px;
  }
  @media (max-width:900px){ .benefits-grid{grid-template-columns:1fr 1fr;} }
  @media (max-width:560px){ .benefits-grid{grid-template-columns:1fr;} }
  .benefit-card{
    border:1px solid var(--line); border-radius:var(--radius); padding:28px 24px;
    transition: border-color .18s, transform .18s;
  }
  .benefit-card:hover{ border-color:var(--blue); transform:translateY(-3px); }
  .benefit-icon{
    width:40px; height:40px; border-radius:9px; background:var(--offwhite);
    display:flex; align-items:center; justify-content:center; margin-bottom:18px;
  }
  .benefit-icon svg{width:20px; height:20px; stroke:var(--blue);}
  .benefit-card h3{ font-size:17px; margin-bottom:8px; }
  .benefit-card p{ font-size:14.5px; color:var(--grey); }

  .section-head{ max-width:640px; }
  .section-head h2{ font-size:clamp(26px,3vw,36px); margin:14px 0 12px; }
  .section-head p{ color:var(--grey); font-size:16px; }

  /* ---------- Services ---------- */
  .services-grid{ display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-top:44px; }
  @media (max-width:860px){ .services-grid{grid-template-columns:1fr;} }
  .service-card{
    background:var(--offwhite);
    border-radius:20px;
    padding:40px 36px;
    display:flex; flex-direction:column;
    border-top:3px solid var(--blue);
  }
  .service-card.deep{ border-top-color:var(--blue-deep); }
  .service-num{ font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--blue); letter-spacing:.1em; margin-bottom:14px;}
  .service-card h3{ font-size:24px; margin-bottom:18px; }
  .service-list{ list-style:none; margin-bottom:28px; flex:1; }
  .service-list li{
    font-size:14.5px; padding:9px 0; border-bottom:1px solid var(--line);
    display:flex; align-items:center; gap:10px; color:var(--navy);
  }
  .service-list li:last-child{border-bottom:none;}
  .service-list li::before{content:""; width:5px; height:5px; background:var(--blue); border-radius:50%; flex-shrink:0;}

  /* ---------- How we work ---------- */
  .steps{ margin-top:52px; }
  .steps-row{
    display:grid; grid-template-columns:repeat(8,1fr); gap:0;
    position:relative;
  }
  @media (max-width:960px){ .steps-row{grid-template-columns:repeat(4,1fr); row-gap:36px;} }
  @media (max-width:560px){ .steps-row{grid-template-columns:repeat(2,1fr);} }
  .step{ position:relative; padding-right:14px; }
  .step-num{
    font-family:'IBM Plex Mono', monospace; font-weight:600; font-size:13px; color:var(--blue);
    border:1.5px solid var(--blue); width:30px; height:30px; border-radius:50%;
    display:flex; align-items:center; justify-content:center; margin-bottom:14px; background:#fff; position:relative; z-index:2;
  }
  .step-line{
    position:absolute; top:15px; left:30px; right:-14px; height:1.5px; background:var(--line); z-index:1;
  }
  .step:last-child .step-line{ display:none; }
  .step h4{ font-size:14.5px; font-weight:600; line-height:1.3; }

  /* ---------- Deliverables ---------- */
  .deliv-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:44px; }
  @media (max-width:860px){ .deliv-grid{grid-template-columns:1fr 1fr;} }
  @media (max-width:560px){ .deliv-grid{grid-template-columns:1fr;} }
  .deliv-item{
    display:flex; align-items:center; gap:14px;
    border:1px solid var(--line); border-radius:12px; padding:18px 20px;
  }
  .deliv-item .dot{ width:8px; height:8px; border-radius:2px; background:var(--blue); flex-shrink:0; }
  .deliv-item span{ font-size:15px; font-weight:500; }

  /* ---------- Suitable for ---------- */
  .suitable-band{ background:var(--navy); color:#fff; }
  .suitable-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:44px; }
  @media (max-width:860px){ .suitable-grid{grid-template-columns:repeat(2,1fr);} }
  .suitable-item{
    border:1px solid var(--line-dark); border-radius:12px; padding:20px 18px;
    font-size:15px; font-weight:500; color:#e6ebf5;
    transition:border-color .18s;
  }
  .suitable-item:hover{ border-color:var(--blue); }
  .suitable-band .eyebrow{ color:#7fa8ff; }
  .suitable-band .eyebrow::before{ background:#7fa8ff; }
  .suitable-band .section-head h2{ color:#fff; }
  .suitable-band .section-head p{ color:#9aa7c2; }

  /* ---------- Why choose us ---------- */
  .why-list{ margin-top:44px; display:flex; flex-direction:column; }
  .why-item{
    display:grid; grid-template-columns:80px 1fr; gap:24px; align-items:center;
    padding:26px 0; border-top:1px solid var(--line);
  }
  .why-item:last-child{ border-bottom:1px solid var(--line); }
  .why-item .why-num{ font-family:'IBM Plex Mono', monospace; color:var(--blue); font-size:14px; }
  .why-item h4{ font-size:18px; margin-bottom:4px; }
  .why-item p{ color:var(--grey); font-size:14.5px; }

  /* ---------- Estimate calculator ---------- */
  .estimator{ margin-top:44px; display:flex; flex-direction:column; gap:36px; }
  .est-step-head{ display:flex; align-items:center; gap:12px; margin-bottom:16px; }
  .est-step-num{
    font-family:'IBM Plex Mono', monospace; font-weight:600; font-size:13px; color:#fff;
    background:var(--blue); width:28px; height:28px; border-radius:50%;
    display:flex; align-items:center; justify-content:center; flex-shrink:0;
  }
  .est-step-head h3{ font-size:17px; }
  .chip-grid{ display:flex; flex-wrap:wrap; gap:10px; }
  .chip{
    font-family:'IBM Plex Sans', sans-serif; font-size:14px; font-weight:500;
    padding:11px 18px; border-radius:999px; border:1.5px solid var(--line);
    background:#fff; color:var(--navy); cursor:pointer; transition:all .15s;
  }
  .chip:hover{ border-color:var(--blue); }
  .chip.active{ background:var(--blue); border-color:var(--blue); color:#fff; }
  .check-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:10px; }
  @media (max-width:860px){ .check-grid{ grid-template-columns:1fr 1fr; } }
  @media (max-width:560px){ .check-grid{ grid-template-columns:1fr; } }
  .check-item{
    display:flex; align-items:center; gap:10px; font-size:14px; color:var(--navy);
    border:1.5px solid var(--line); border-radius:10px; padding:11px 14px; background:#fff;
    cursor:pointer; transition:border-color .15s;
  }
  .check-item:hover{ border-color:var(--blue); }
  .check-item input{ accent-color:var(--blue); width:16px; height:16px; flex-shrink:0; }
  .est-summary{
    background:var(--navy); color:#fff; border-radius:20px; padding:36px 40px;
    display:flex; flex-direction:column; gap:22px;
  }
  @media (max-width:640px){ .est-summary{ padding:28px 24px; } }
  .est-summary .eyebrow{ color:#7fa8ff; }
  .est-summary .eyebrow::before{ background:#7fa8ff; }
  .est-summary-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:18px; }
  @media (max-width:860px){ .est-summary-grid{ grid-template-columns:repeat(2,1fr); } }
  .est-summary-row{ display:flex; flex-direction:column; gap:4px; }
  .est-summary-row span{ font-family:'IBM Plex Mono', monospace; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:#8fa2c9; }
  .est-summary-row strong{ font-size:16px; font-weight:600; }
  .est-price{
    display:flex; align-items:baseline; justify-content:space-between;
    border-top:1px solid var(--line-dark); border-bottom:1px solid var(--line-dark);
    padding:18px 0;
  }
  .est-price span{ font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:#8fa2c9; }
  .est-price strong{ font-size:28px; font-family:'Space Grotesk', sans-serif; color:#fff; }
  .est-actions{ display:flex; gap:14px; flex-wrap:wrap; }
  .est-actions .btn-ghost{ border-color:var(--line-dark); color:#fff; }
  .est-actions .btn-ghost:hover{ border-color:var(--blue); color:var(--blue); }

  /* ---------- CTA ---------- */
  .cta-band{
    background:linear-gradient(135deg, var(--blue-deep), var(--blue));
    color:#fff; border-radius:24px; padding:64px 48px; text-align:center;
    margin:0 32px;
  }
  @media (max-width:640px){ .cta-band{ padding:44px 24px; } }
  .cta-band h2{ color:#fff; font-size:clamp(26px,3.4vw,38px); margin-bottom:14px; }
  .cta-band p{ color:#dbe6ff; font-size:16px; margin-bottom:30px; }
  .cta-band .btn-primary{ background:#fff; color:var(--blue-deep); }
  .cta-band .btn-primary:hover{ background:var(--offwhite); }
  .cta-actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

  /* ---------- Footer ---------- */
  footer{ background:var(--navy); color:#9aa7c2; padding:64px 0 32px; margin-top:40px; }
  .footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px; }
  @media (max-width:760px){ .footer-grid{grid-template-columns:1fr 1fr; row-gap:32px;} }
  .footer-brand img{ height:26px; margin-bottom:14px; }
  .footer-brand p{ font-size:14px; max-width:260px; line-height:1.6; }
  .footer-col h5{
    font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:.1em; text-transform:uppercase;
    color:#fff; margin-bottom:16px; font-weight:500;
  }
  .footer-col a{ display:block; font-size:14.5px; padding:6px 0; color:#9aa7c2; transition:color .15s; }
  .footer-col a:hover{ color:var(--blue); }
  .footer-bottom{
    border-top:1px solid var(--line-dark); padding-top:24px;
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
    font-size:13px; color:#6b7998;
  }
  .footer-legal{
    margin-top:14px; font-size:12px; color:#54628a; line-height:1.6;
  }