:root{
    --ink:#11304a;
    --ink-soft:#1b3a54;
    --body:#5c6675;
    --muted:#8b93a2;
    --bg:#fbfdfd;
    --bg-alt:#f5f7fa;
    --card:#ffffff;
    --border:#e7ebf0;
    --shadow:0 6px 24px rgba(17,48,74,.06);
    --teal:#0e6a70;
    --rust:#a8503d;
    --orange:#c8592e;
    --testi-bg:#fbf0ea;
    --grad:linear-gradient(115deg,var(--teal) 0%,var(--rust) 100%);
    --radius:16px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    *{animation-duration:.001ms !important;animation-iteration-count:1 !important;}
  }
  body{
    margin:0;background:var(--bg);color:var(--ink);
    font-family:'Inter',Arial,sans-serif;line-height:1.6;font-size:16px;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul{margin:0;padding:0;list-style:none;}
  p{margin:0;}
  h1,h2,h3{margin:0;font-family:'Lora',Georgia,serif;font-weight:600;color:var(--ink);letter-spacing:-0.01em;}
  .wrap{max-width:1220px;margin:0 auto;padding:0 40px;}
  @media (max-width:640px){.wrap{padding:0 22px;}}
  .grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}

  /* ---------------- header ---------------- */
  header{position:sticky;top:0;z-index:60;background:rgba(251,253,253,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);}
  .nav{display:flex;align-items:center;justify-content:space-between;padding:18px 40px;max-width:1220px;margin:0 auto;}
  .brand{display:flex;align-items:center;gap:10px;font-family:'Lora',serif;font-weight:600;font-size:19px;color:var(--ink);}
  .brand img{height:30px;width:30px;}
  .nav-links{display:flex;gap:32px;}
  .nav-links a{color:var(--body);font-size:14.5px;font-weight:500;transition:color .15s;}
  .nav-links a:hover{color:var(--ink);}
  .nav-right{display:flex;align-items:center;gap:18px;}
  .btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:transform .15s,box-shadow .15s;white-space:nowrap;}
  .btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(168,80,61,.25);}
  .btn-grad:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(168,80,61,.32);}
  .btn-outline{border-color:var(--border);color:var(--ink);background:#fff;}
  .btn-outline:hover{border-color:var(--muted);}
  .burger{display:none;background:none;border:none;font-size:22px;color:var(--ink);cursor:pointer;}
  .mobile-panel{display:none;}
  @media (max-width:880px){
    .nav-links{display:none;}
    .nav-right .btn-outline{display:none;}
    .burger{display:block;}
    .mobile-panel.open{display:flex;flex-direction:column;padding:6px 40px 22px;border-top:1px solid var(--border);}
    .mobile-panel a{padding:12px 0;border-bottom:1px solid var(--border);color:var(--body);font-size:15px;}
  }

  section{padding:110px 0;}
  @media (max-width:700px){section{padding:64px 0;}}
  .alt{background:var(--bg-alt);}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--body);
    border:1px solid var(--border);border-radius:999px;padding:7px 16px;margin-bottom:22px;background:#fff;
  }
  .eyebrow-plain{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--orange);margin-bottom:16px;display:block;text-transform:uppercase;}
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--orange);display:inline-block;}
  .section-head{max-width:640px;margin-bottom:52px;}
  .section-head h2{font-size:clamp(28px,3.6vw,38px);line-height:1.22;}
  .section-head p{margin-top:16px;color:var(--body);font-size:16.5px;}

  /* ---------------- hero ---------------- */
  .hero{position:relative;padding-top:78px;padding-bottom:0;overflow:hidden;}
  .hero::before{
    content:"";position:absolute;top:-160px;left:-160px;width:480px;height:480px;border-radius:50%;
    background:radial-gradient(circle,rgba(14,106,112,.10),transparent 70%);pointer-events:none;
  }
  .hero::after{
    content:"";position:absolute;top:-80px;right:-200px;width:560px;height:560px;border-radius:50%;
    background:radial-gradient(circle,rgba(168,80,61,.08),transparent 70%);pointer-events:none;
  }
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;}
  @media (max-width:940px){.hero-grid{grid-template-columns:1fr;}}
  .hero h1{font-size:clamp(36px,5vw,56px);line-height:1.12;}
  .hero h1 em{font-style:italic;font-weight:600;}
  .hero p.lede{margin-top:22px;color:var(--body);font-size:17.5px;max-width:480px;}
  .hero-ctas{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}

  .hero-visual{position:relative;}
  .device-frame{position:relative;z-index:2;}
  .laptop{background:#e6e9ec;border-radius:14px 14px 0 0;padding:10px 10px 0;box-shadow:0 30px 60px rgba(17,48,74,.18);}
  .laptop-screen{background:#fff;border-radius:8px;overflow:hidden;aspect-ratio:16/15;display:flex;flex-direction:column;}
  .laptop-base{height:12px;background:linear-gradient(#d7dbdf,#c3c8cd);border-radius:0 0 10px 10px;margin:0 -4px;}
  .dash-topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid #eef1f4;}
  .dash-brand{display:flex;align-items:center;gap:6px;font-weight:700;font-size:12px;color:var(--ink);font-family:'Inter';}
  .dash-brand .sq{width:14px;height:14px;border-radius:4px;background:var(--grad);}
  .dash-avatar{width:18px;height:18px;border-radius:50%;background:var(--grad);}
  .dash-body{display:flex;flex:1;min-height:0;}
  .dash-side{width:26%;background:#fafbfc;border-right:1px solid #eef1f4;padding:10px 8px;display:flex;flex-direction:column;gap:6px;}
  .dash-side .item{height:7px;border-radius:3px;background:#e7ebee;}
  .dash-side .item.active{background:var(--teal);opacity:.85;}
  .dash-main{flex:1;padding:12px 14px;display:flex;flex-direction:column;gap:9px;min-height:0;}
  .dash-greet{font-size:11px;color:var(--muted);font-weight:600;display:flex;justify-content:space-between;align-items:center;}
  .dash-greet .pill{background:#eaf4f3;color:var(--teal);font-size:8px;font-weight:700;padding:3px 7px;border-radius:20px;}
  .dash-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;}
  .dash-stats .card{background:#f7f9fa;border-radius:6px;padding:6px 8px;}
  .dash-stats .num{font-size:11px;font-weight:700;color:var(--ink);}
  .dash-stats .lbl{font-size:7px;color:var(--muted);margin-top:1px;}
  .dash-stats .up{font-size:7px;color:var(--teal);font-weight:700;margin-top:2px;}
  .dash-row{display:flex;gap:9px;flex:1;min-height:0;}
  .dash-chart{flex:1.4;background:#f7f9fa;border-radius:6px;position:relative;overflow:hidden;min-height:60px;padding:8px;}
  .dash-chart .chart-lbl{font-size:7px;color:var(--muted);font-weight:700;margin-bottom:2px;}
  .dash-chart svg{position:absolute;left:0;right:0;bottom:0;width:100%;height:70%;}
  .dash-list{flex:1;background:#f7f9fa;border-radius:6px;padding:8px;display:flex;flex-direction:column;gap:6px;min-height:0;}
  .dash-list .chart-lbl{font-size:7px;color:var(--muted);font-weight:700;margin-bottom:1px;}
  .dash-list .li{display:flex;align-items:center;gap:6px;}
  .dash-list .ic{width:14px;height:14px;border-radius:4px;background:var(--grad);flex:none;}
  .dash-list .tx{flex:1;height:5px;border-radius:3px;background:#e7ebee;}
  .dash-bars{display:flex;align-items:flex-end;gap:5px;height:78%;}
  .dash-bars div{flex:1;background:linear-gradient(180deg,var(--teal),var(--rust));border-radius:2px 2px 0 0;opacity:.85;}
  .dash-donut{flex:.7;background:#f7f9fa;border-radius:6px;padding:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;}
  .donut-ring{width:44px;height:44px;border-radius:50%;background:conic-gradient(var(--teal) 0deg 345deg, #e7ebee 345deg 360deg);display:flex;align-items:center;justify-content:center;position:relative;}
  .donut-ring::before{content:"";width:28px;height:28px;border-radius:50%;background:#f7f9fa;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);}
  .donut-num{position:relative;font-size:7px;font-weight:700;color:var(--ink);z-index:1;}
  .phone{
    position:absolute;right:-28px;bottom:-30px;width:34%;background:#1f2530;border-radius:22px;padding:8px;
    box-shadow:0 24px 50px rgba(17,48,74,.25);z-index:3;
  }
  .phone-screen{background:#fff;border-radius:14px;aspect-ratio:9/20;overflow:hidden;padding:10px 8px;display:flex;flex-direction:column;gap:6px;}
  .phone-greet{font-size:8px;color:var(--muted);font-weight:600;}
  .phone-stats{display:flex;gap:5px;}
  .phone-stats div{flex:1;background:#f7f9fa;border-radius:5px;padding:5px;}
  .phone-stats .num{font-size:8px;font-weight:700;color:var(--ink);}
  .phone-stats .lbl{font-size:5.5px;color:var(--muted);}
  .phone-chart{height:20%;background:#f7f9fa;border-radius:6px;overflow:hidden;position:relative;padding:5px;}
  .phone-chart .chart-lbl{font-size:6px;color:var(--muted);font-weight:700;}
  .phone-chart svg{position:absolute;left:0;right:0;bottom:0;width:100%;height:65%;}
  .phone-bars{height:16%;background:#f7f9fa;border-radius:6px;padding:5px;display:flex;flex-direction:column;}
  .phone-bars .chart-lbl{font-size:6px;color:var(--muted);font-weight:700;margin-bottom:2px;}
  .phone-bars .dash-bars{height:100%;gap:3px;}
  .phone-list{flex:1;background:#f7f9fa;border-radius:6px;padding:6px;display:flex;flex-direction:column;gap:5px;min-height:0;}
  .phone-list .chart-lbl{font-size:6px;color:var(--muted);font-weight:700;margin-bottom:1px;}
  .phone-list .li{display:flex;align-items:center;gap:5px;}
  .phone-list .ic{width:10px;height:10px;border-radius:3px;background:var(--grad);flex:none;}
  .phone-list .tx{flex:1;height:4px;border-radius:3px;background:#e7ebee;}

  .uptime-chip{
    position:absolute;left:-18px;bottom:-26px;z-index:4;background:#fff;border:1px solid var(--border);
    border-radius:12px;padding:14px 18px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;
  }
  .uptime-chip .ic{width:34px;height:34px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex:none;}
  .uptime-chip .ic svg{width:17px;height:17px;color:#fff;}
  .uptime-chip .num{font-family:'Lora',serif;font-size:21px;color:var(--ink);line-height:1;}
  .uptime-chip .lbl{font-size:10.5px;letter-spacing:.05em;color:var(--muted);margin-top:3px;text-transform:uppercase;}

  /* capability strip (static, no motion) */
  .cap-strip{margin-top:100px;background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:30px 0;}
  .cap-grid{max-width:1220px;margin:0 auto;padding:0 40px;display:flex;flex-wrap:wrap;justify-content:center;gap:14px 34px;}
  @media (max-width:640px){.cap-grid{padding:0 22px;gap:12px 22px;}}
  .cap-item{display:flex;align-items:center;gap:10px;font-size:13.5px;font-weight:600;color:var(--ink-soft);white-space:nowrap;}
  .cap-item .ic-sm{width:28px;height:28px;border-radius:8px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex:none;}
  .cap-item .ic-sm svg{width:14px;height:14px;color:#fff;}

  /* ---------------- about ---------------- */
  .about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:start;}
  @media (max-width:880px){.about-grid{grid-template-columns:1fr;}}
  .about-copy h2{font-size:clamp(26px,3.4vw,34px);line-height:1.28;margin-bottom:22px;}
  .about-copy p{color:var(--body);font-size:16px;margin-bottom:16px;}
  .feat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px 24px;display:flex;gap:16px;margin-bottom:18px;}
  .feat-card:last-child{margin-bottom:0;}
  .badge{width:42px;height:42px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex:none;}
  .badge svg{width:20px;height:20px;color:#fff;}
  .feat-card h3{font-size:16.5px;margin-bottom:6px;}
  .feat-card p{color:var(--body);font-size:14px;margin:0;}

  /* ---------------- services ---------------- */
  .card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
  @media (max-width:980px){.card-grid{grid-template-columns:repeat(2,1fr);}}
  @media (max-width:560px){.card-grid{grid-template-columns:1fr;}}
  .svc-card{
    position:relative;background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);
    padding:28px 24px;overflow:hidden;transition:transform .18s,box-shadow .18s;
  }
  .svc-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(17,48,74,.10);}
  .svc-num{position:absolute;top:14px;right:20px;font-family:'Lora',serif;font-size:44px;color:var(--ink);opacity:.06;line-height:1;}
  .svc-card h3{font-size:18px;margin:16px 0 10px;line-height:1.3;}
  .svc-card p{color:var(--body);font-size:14px;margin-bottom:16px;}
  .svc-card .divider{border-top:1px solid var(--border);margin:14px 0 12px;}
  .svc-card ul li{font-size:13.5px;color:var(--ink-soft);padding-left:14px;position:relative;margin-bottom:7px;}
  .svc-card ul li::before{content:"";position:absolute;left:0;top:7px;width:5px;height:5px;border-radius:50%;background:var(--orange);}

  /* ---------------- industries ---------------- */
  .photo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
  @media (max-width:980px){.photo-grid{grid-template-columns:repeat(2,1fr);}}
  @media (max-width:560px){.photo-grid{grid-template-columns:1fr;}}
  .ind-card{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);overflow:hidden;transition:transform .18s,box-shadow .18s;}
  .ind-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(17,48,74,.10);}
  .ind-photo{height:150px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;}
  .ind-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(255,255,255,.14),rgba(0,0,0,.12));}
  .ind-photo svg{width:40px;height:40px;color:rgba(255,255,255,.92);position:relative;z-index:1;}
  .ind-body{padding:20px 22px 24px;}
  .ind-card h3{font-size:15.5px;margin-bottom:8px;}
  .ind-card p{color:var(--body);font-size:13.5px;}

  /* ---------------- security ---------------- */
  .sec-banner{background:var(--grad);border-radius:28px;padding:56px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;color:#fff;}
  @media (max-width:900px){.sec-banner{grid-template-columns:1fr;padding:36px 26px;}}
  .sec-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);border-radius:999px;padding:7px 16px;font-size:12.5px;font-weight:600;letter-spacing:.05em;margin-bottom:20px;}
  .sec-eyebrow svg{width:13px;height:13px;}
  .sec-banner h2{color:#fff;font-size:clamp(26px,3.2vw,34px);line-height:1.25;margin-bottom:16px;}
  .sec-banner > div:first-child p{color:rgba(255,255,255,.86);font-size:15.5px;max-width:420px;}
  .sec-feats{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  @media (max-width:480px){.sec-feats{grid-template-columns:1fr;}}
  .sec-feat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:14px;padding:18px;backdrop-filter:blur(6px);}
  .sec-feat h3{color:#fff;font-size:15.5px;margin-bottom:8px;font-family:'Lora',serif;}
  .sec-feat p{color:rgba(255,255,255,.82);font-size:13px;margin:0;}

  .stat-strip{display:grid;grid-template-columns:repeat(4,1fr);text-align:center;}
  @media (max-width:640px){.stat-strip{grid-template-columns:1fr 1fr;row-gap:36px;}}
  .stat-strip .num{font-family:'Lora',serif;font-size:clamp(30px,3.6vw,42px);color:var(--ink);}
  .stat-strip .num.rust{color:var(--rust);}
  .stat-strip .lbl{margin-top:8px;font-size:12.5px;letter-spacing:.05em;color:var(--muted);text-transform:uppercase;}

  /* ---------------- testimonials ---------------- */
  /* testimonial carousel */
  #testimonials{background:var(--testi-bg);overflow:hidden;}
  .testi-carousel{max-width:1220px;margin:0 auto;padding:0 40px;display:flex;align-items:center;gap:18px;}
  @media (max-width:700px){.testi-carousel{padding:0 14px;gap:8px;}}
  .testi-viewport{flex:1;overflow:hidden;}
  .testi-track{display:flex;gap:24px;transition:transform .45s cubic-bezier(.22,.8,.28,1);}
  .testi-arrow{
    flex:none;width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;border:none;cursor:pointer;
    display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(168,80,61,.28);
    transition:transform .15s;
  }
  .testi-arrow:hover{transform:scale(1.06);}
  .testi-arrow svg{width:19px;height:19px;}
  .quote-card{
    flex:0 0 min(640px,78vw);background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow);
    padding:40px 40px 32px;display:flex;flex-direction:column;gap:20px;align-items:center;text-align:center;
  }
  @media (max-width:640px){.quote-card{padding:28px 24px 24px;}}
  .quote-card .org-tag{display:flex;align-items:center;gap:9px;color:var(--teal);font-weight:600;font-size:13px;letter-spacing:.02em;}
  .quote-card .org-tag .ic-sm{width:26px;height:26px;border-radius:8px;background:var(--grad);display:flex;align-items:center;justify-content:center;}
  .quote-card .org-tag .ic-sm svg{width:13px;height:13px;color:#fff;}
  .quote-card .mark{width:38px;height:28px;color:var(--rust);opacity:.35;}
  .quote-card p.q{font-family:'Lora',serif;font-size:18px;line-height:1.6;color:var(--ink);max-width:480px;}
  .quote-who{display:flex;flex-direction:column;align-items:center;gap:2px;}
  .quote-who .name{font-weight:700;font-size:15px;color:var(--ink);}
  .quote-who .org{font-size:13px;color:var(--muted);}
  .testi-dots{display:flex;justify-content:center;gap:10px;margin-top:30px;}
  .testi-dots button{width:10px;height:10px;border-radius:50%;border:none;background:transparent;box-shadow:inset 0 0 0 1.5px var(--rust);cursor:pointer;padding:0;transition:background .2s;}
  .testi-dots button.active{background:var(--rust);}

  /* ---------------- contact ---------------- */
  .contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;}
  @media (max-width:900px){.contact-grid{grid-template-columns:1fr;}}
  .contact-info{margin-top:34px;}
  .contact-info-item{padding:16px 0;border-top:1px solid var(--border);}
  .contact-info-item h4{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:6px;}
  .contact-info-item p{font-size:15px;color:var(--ink);}
  .contact-card{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow);padding:34px;}
  form{display:grid;gap:20px;}
  .row-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
  @media (max-width:520px){.row-2{grid-template-columns:1fr;}}
  label{display:block;font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:8px;}
  input,select,textarea{
    width:100%;background:#fff;border:1px solid var(--border);border-radius:10px;color:var(--ink);
    font-family:'Inter';font-size:14.5px;padding:11px 13px;outline:none;transition:border-color .15s;
  }
  input::placeholder,textarea::placeholder{color:#b7bec9;}
  input:focus,select:focus,textarea:focus{border-color:var(--teal);}
  textarea{resize:vertical;min-height:96px;}
  form .btn{width:100%;justify-content:center;padding:14px;font-size:15px;}
  .form-note{font-size:12.5px;color:var(--muted);text-align:center;display:flex;align-items:center;justify-content:center;gap:6px;}
  .form-note svg{width:13px;height:13px;color:var(--orange);}
  .form-status{font-size:13.5px;text-align:center;min-height:18px;margin:0;}
  .form-status.success{color:var(--teal);font-weight:600;}
  .form-status.error{color:var(--rust);font-weight:600;}

  /* ---------------- footer ---------------- */
  footer{background:var(--bg-alt);padding:64px 0 30px;border-top:1px solid var(--border);}
  .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:36px;}
  @media (max-width:700px){.foot-grid{grid-template-columns:1fr;gap:28px;}}
  .foot-brand{display:flex;align-items:center;gap:9px;font-family:'Lora',serif;font-weight:600;font-size:18px;margin-bottom:14px;color:var(--ink);}
  .foot-brand img{height:24px;width:24px;}
  .foot-grid p{color:var(--body);font-size:14px;max-width:320px;}
  .foot-grid h4{font-size:12.5px;color:var(--muted);font-weight:600;letter-spacing:.05em;text-transform:uppercase;margin-bottom:14px;}
  .foot-grid ul li{margin-bottom:10px;}
  .foot-grid ul a{color:var(--ink-soft);font-size:14.5px;}
  .foot-grid ul a:hover{color:var(--orange);}
  .foot-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px;}
  .foot-bottom span{display:flex;align-items:center;gap:6px;}
  .foot-bottom svg{width:13px;height:13px;color:var(--orange);}

  /* ---------------- back to top ---------------- */
  .to-top{
    position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
    background:var(--grad);color:#fff;border:none;cursor:pointer;z-index:70;
    display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px rgba(17,48,74,.28);
    opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .25s,transform .25s;
  }
  .to-top.visible{opacity:1;transform:translateY(0);pointer-events:auto;}
  .to-top:hover{transform:translateY(-2px);}
  .to-top svg{width:20px;height:20px;}
  @media (max-width:640px){.to-top{right:16px;bottom:16px;width:44px;height:44px;}}