@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Outfit:wght@300;400;500;600;700&display=swap');

                :root {
                  --orange:      #354dc5;
                  --orange-2:    #169106;
                  --orange-glow: rgba(232,80,10,0.22);
                  --dark:        #000000;
                  --dark-2:      #000000;
                  --dark-3:      #737272;
                  --off-white:   #f4f1ed;
                  --white:       #ffffff;
                  --gray:        #7a7a7a;
                  --ease:        cubic-bezier(.4,0,.2,1);
                  --logo-h:      96px; /* valore di fallback, JS lo aggiorna con l'altezza reale */
                }

                *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
                html { scroll-behavior: smooth; }
                body { font-family: 'Outfit', sans-serif; background: var(--dark); color: var(--white); overflow-x: hidden; padding-top: var(--logo-h); }
                ::-webkit-scrollbar { width: 3px; }
                ::-webkit-scrollbar-track { background: var(--dark); }
                ::-webkit-scrollbar-thumb { background: var(--orange); border-radius: 3px; }

                /* ── LOGO BAR ── */
                /* La barra principale */
            .logo-bar {
                position: fixed;   /* resta ancorata in alto durante lo scroll */
                top: 0; left: 0;
                width: 100%;
                z-index: 200;      /* sopra la nav, che ha z-index 199 */
                background-color: #ffffff; /* Sfondo bianco, cambialo se serve */
                padding: 20px 0;           /* Spazio sopra e sotto il logo */
                display: flex;             /* Attiva Flexbox */
                justify-content: center;   /* Centra orizzontalmente */
                align-items: center;       /* Centra verticalmente */
                border-bottom: 1px solid #eee; /* Una riga sottile di separazione (opzionale) */
            }

            /* Il contenitore del logo */
            .logo-wrapper img {
                max-width: 400px;          /* Imposta la larghezza massima del tuo logo */
                height: auto;              /* Mantiene le proporzioni */
                display: block;            /* Rimuove spazi vuoti sotto l'immagine */
            }

            /* --- RESPONSIVE MOBILE --- */
            @media (max-width: 767px) {
                .logo-wrapper img {
                    max-width: 300px;      /* Logo leggermente più piccolo su smartphone */
                }
                .footer-col {
                  text-align: center;
                }
                .logo-bar {
                    padding: 10px 0;
                }
            }
                .logo-bar-inner {
                  display: flex; flex-direction: column; align-items: center; gap: 4px;
                  pointer-events: all;
                }
                .logo-emblem {
                  width: 54px; height: 54px; border-radius: 50%;
                  border: 2px solid rgba(255,255,255,0.18);
                  background: rgba(13,13,13,0.82);
                  backdrop-filter: blur(16px);
                  display: flex; align-items: center; justify-content: center;
                  font-family: 'Cormorant Garamond', serif;
                  font-size: 15px; font-weight: 600; letter-spacing: -.5px; color: var(--white);
                  text-decoration: none;
                  transition: border-color .3s, box-shadow .3s;
                }
                .logo-emblem .o { color: var(--orange); }
                .logo-emblem:hover { border-color: var(--orange); box-shadow: 0 0 18px var(--orange-glow); }
                .logo-name { font-size: 10px; letter-spacing: 4px; text-transform: uppercase; color: rgba(255,255,255,0.5); font-weight: 500; }
                .cmyk { display: flex; gap: 3px; margin-top: 2px; }
                .cmyk span { height: 2px; width: 16px; border-radius: 2px; }

                /* ── NAV ── */
                .main-nav {
                  position: fixed; left: 50%; transform: translateX(-50%);
                  top: calc(var(--logo-h) + 47px); z-index: 199;
                  max-width: calc(100vw - 24px); /* non esce mai dai bordi dello schermo */
                  overflow-x: auto; overflow-y: hidden; /* scorrevole se il testo tradotto e troppo lungo */
                  scrollbar-width: none; -ms-overflow-style: none; /* nasconde la scrollbar */
                  background: rgba(14,14,14,0.72);
                  backdrop-filter: blur(20px);
                  border: 1px solid white;
                  border-radius: 100px;
                  padding: 10px clamp(14px, 4vw, 30px);
                  display: flex; align-items: center; gap: clamp(10px, 3vw, 30px);
                  transition: top .4s var(--ease), background .4s, box-shadow .4s;
                  white-space: nowrap;
                }
                .main-nav::-webkit-scrollbar { display: none; } /* nasconde la scrollbar su Chrome/Safari */
                .main-nav.scrolled {
                  top: calc(var(--logo-h) + 29px);
                  background: rgba(14,14,14,0.94);
                  box-shadow: 0 6px 30px rgba(0,0,0,.5);
                }
                .main-nav a {
                  font-size: clamp(11px, 2vw, 13px); font-weight: 500; letter-spacing: 1.8px;
                  text-transform: uppercase; text-decoration: none;
                  color: rgba(255,255,255,0.45);
                  transition: color .25s;
                }
                .main-nav a:hover, .main-nav a.active { color: var(--white); }
                .nav-sep { width: 1px; height: 14px; background: rgba(255,255,255,0.1); }
                .nav-cta {
                  background: var(--orange) !important; color: var(--white) !important;
                  padding: 8px 20px !important; border-radius: 100px; font-weight: 600 !important;
                  transition: background .25s, transform .25s, box-shadow .25s !important;
                }
                .nav-cta:hover { background: var(--orange-2) !important; transform: scale(1.05) !important; box-shadow: 0 4px 14px var(--orange-glow) !important; }

                /* ══ HERO CAROUSEL ══ */
                .hero { position: relative; height: 80vh; min-height: 580px; overflow: hidden; }
                .slide {
                  position: absolute; inset: 0;
                  display: flex; align-items: center; justify-content: center; text-align: center;
                  opacity: 0; transition: opacity 1s ease; pointer-events: none;
                }
                .slide.active { opacity: 1; z-index: 2; pointer-events: all; }
                .slide-bg {
                  position: absolute; inset: 0; z-index: 0;
                  background: var(--dark);
                }
                .slide-bg-emoji {
                  position: absolute; inset: 0;
                  display: flex; align-items: center; justify-content: center;
                  font-size: 280px; opacity: .1; user-select: none;
                  animation: slowZoom 14s ease-in-out infinite alternate;
                }
                @keyframes slowZoom { from { transform: scale(1); } to { transform: scale(1.1); } }
                .slide-bg::after {
                  content: ''; position: absolute; inset: 0;
                  background: linear-gradient(160deg, rgba(13,13,13,.5) 0%, rgba(13,13,13,.8) 100%);
                }
                .slide-content { position: relative; z-index: 3; max-width: 880px; padding: 0 24px; }
                .slide-tag {
                  display: inline-block;
                  border: 1px solid rgba(232,80,10,.4); color: white;
                  font-size: 14px; letter-spacing: 4px; text-transform: uppercase;
                  padding: 5px 18px; border-radius: 100px; margin-bottom: 28px;
                  opacity: 0; transform: translateY(14px);
                  transition: opacity .55s .3s, transform .55s .3s;
                }
                .slide.active .slide-tag { opacity: 1; transform: none; }
                .slide-content h1 {
                  font-family: 'Cormorant Garamond', serif;
                  font-size: clamp(54px, 9vw, 112px);
                  font-weight: 300; line-height: 1; letter-spacing: -1px; color: var(--white);
                  opacity: 0; transform: translateY(22px);
                  transition: opacity .65s .42s, transform .65s .42s;
                }
                .slide.active .slide-content h1 { opacity: 1; transform: none; }
                .slide-content h1 em { font-style: italic; color: var(--orange); }
                .slide-content p {
                  font-size: clamp(15px, 1.6vw, 17px); font-weight: 300;
                  color: rgba(255,255,255,0.52); line-height: 1.75;
                  max-width: 480px; margin: 20px auto 0;
                  opacity: 0; transform: translateY(14px);
                  transition: opacity .55s .58s, transform .55s .58s;
                }
                .slide.active .slide-content p { opacity: 1; transform: none; }
                .slide-btn {
                  display: inline-block; margin-top: 38px;
                  background: var(--orange); color: var(--white); text-decoration: none;
                  padding: 14px 38px; border-radius: 100px;
                  font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
                  opacity: 0; transform: translateY(10px);
                  transition: opacity .5s .72s, transform .5s .72s;
                }
                .slide.active .slide-btn { opacity: 1; transform: none; }
                .slide-btn:hover { background: var(--orange-2); box-shadow: 0 8px 24px var(--orange-glow); }

                .carousel-dots {
                  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
                  z-index: 10; display: flex; align-items: center; gap: 10px;
                }
                .cdot {
                  width: 6px; height: 6px; border-radius: 100px;
                  background: rgba(255,255,255,0.22); border: none; cursor: pointer;
                  transition: background .3s, width .3s; padding: 0;
                }
                .cdot.active { background: var(--orange); width: 26px; }

                .carousel-arrows {
                  position: absolute; top: 50%; transform: translateY(-50%);
                  z-index: 10; width: 100%;
                  display: flex; justify-content: space-between; padding: 0 28px;
                  pointer-events: none;
                }
                .carrow {
                  width: 48px; height: 48px; border-radius: 50%;
                  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255);
                  color: var(--white); font-size: 18px;
                  display: flex; align-items: center; justify-content: center;
                  cursor: pointer; pointer-events: all; backdrop-filter: blur(8px);
                  transition: background .25s, border-color .25s;
                }
                .carrow:hover { background: var(--orange); border-color: var(--orange); }

                /* ══ SECTIONS ══ */
                section[id] { scroll-margin-top: calc(var(--logo-h) + 90px); }
                .sec { padding: 130px 48px 100px; }
                .sec-inner { max-width: 1160px; margin: 0 auto; }
                .sec-label {
                  font-size: 14px; letter-spacing: 4px; text-transform: uppercase;
                  color: var(--orange); font-weight: 600; margin-bottom: 12px;
                  display: flex; align-items: center; gap: 10px;
                }
                .sec-label::before { content: ''; width: 24px; height: 1px; background: var(--orange); }
                .sec-title {
                  font-family: 'Cormorant Garamond', serif;
                  font-size: clamp(36px, 4vw, 58px); font-weight: 300; line-height: 1.1;
                }
                .sec-title em { font-style: italic; color: var(--orange); }
                .dark-title { color: var(--dark); }
                .dark-label::before { background: var(--orange) !important; }

                /* ══ SERVICES ══ */
                .section-services { background: var(--dark); }
                .srv-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 52px; gap: 24px; flex-wrap: wrap; }
                .srv-sub { font-size: 14px; color: white;  line-height: 1.7; font-weight: 300; }
                .srv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
                .srv-card {
                overflow: hidden; 
                background-color: #f4f1ed;
                  margin: 5px 5px 5px 5px;
                  padding-top: 22px;
                  border-radius: 12px;
                  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
                }
                    .srv-img {
                    width: 100%;
                    height: 200px; /* Imposta l'altezza che preferisci per le immagini delle card */
                    overflow: hidden;
                    margin-bottom: 20px;
                }
                .srv-img img {
            width: 100%;
            height: 100%;
            object-fit: cover; /* Fondamentale: riempie lo spazio senza schiacciare l'immagine */
            transition: transform 0.3s ease;
        }
                
                
                .srv-card::after {
                  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
                  background: var(--orange); transform: scaleX(0); transform-origin: left;
                  transition: transform .35s var(--ease);
                }
                .srv-num { font-family: 'Cormorant Garamond', serif; font-size: 70px; font-weight: 300; color: rgba(255,255,255); line-height: 1; margin-bottom: 20px; }
                .srv-ico { font-size: 30px; margin-bottom: 16px; }
                .srv-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 12px; color: #E8500A; margin-left: 10px; }
                .srv-card p { font-size: 15px; color:rgb(0, 0, 0); line-height: 1.7; font-weight: 300;margin-left: 10px; }
                .srv-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
                .srv-pill {
                  font-size: 13px; color: rgb(0, 0, 0);
                  margin: 1px;
                  margin-bottom: 5px;
                  border: 1px solid  #E8500A;;
                  padding: 4px 12px; border-radius: 100px;
                  transition: border-color .25s, color .25s;
                }
                

                /* ══ ABOUT ══ */
                .section-about { background: var(--off-white); }
                .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
                .about-text p { font-size: 15px; color: #5a5a5a; line-height: 1.9; margin-top: 18px; font-weight: 300; }
                .about-text p strong { color: var(--dark); font-weight: 600; }
                .stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
                .stat-box { background: var(--white); padding: 32px 24px; transition: background .3s; }
                .stat-box:hover { background: var(--orange); }
                .stat-box:hover .sb-num, .stat-box:hover .sb-lbl { color: var(--white); }
                .sb-num { font-family: 'Cormorant Garamond', serif; font-size: 50px; font-weight: 300; line-height: 1; color: var(--dark); transition: color .3s; }
                .sb-lbl { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: #999; margin-top: 6px; transition: color .3s; }

                /* ══ PRODUITS MARQUEE ══ */
                .section-produits { background: var(--dark-2); padding: 80px 0; overflow: hidden; }
                .produits-head { padding: 0 48px 44px; max-width: 1160px; margin: 0 auto; }
                .marquee-wrap { position: relative; overflow: hidden; }
                .marquee-wrap::before, .marquee-wrap::after {
                  content: ''; position: absolute; top: 0; bottom: 0; width: 100px; z-index: 2; pointer-events: none;
                }
                .marquee-wrap::before { left: 0; background: linear-gradient(to right, var(--dark-2), transparent); }
                .marquee-wrap::after  { right: 0; background: linear-gradient(to left,  var(--dark-2), transparent); }
                .marquee-track {
                  display: flex; gap: 10px; width: max-content;
                  animation: marquee 32s linear infinite;
                }
                .marquee-track:hover { animation-play-state: paused; }
                @keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
                .m-chip {
                  display: flex; align-items: center; gap: 8px;
                  background: var(--dark-3); border: 1px solid rgba(255,255,255,.06);
                  border-radius: 100px; padding: 11px 18px;
                  font-size: 14px; color: rgba(255,255,255); white-space: nowrap;
                  transition: border-color .25s, color .25s;
                }
                .m-chip:hover { border-color: var(--orange); color: var(--white); }
                .m-chip .ic { font-size: 15px; }

                /* ══ FINITIONS ══ */
                .section-finitions { background: var(--dark); }
                .fin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; margin-top: 44px; }
                .fin-item {
                  background: var(--dark-2); padding: 18px 20px;
                  font-size: 14px; color: rgba(255,255,255);
                  display: flex; align-items: center; gap: 8px;
                  transition: background .25s, color .25s;
                }
                .fin-item:hover { background: var(--orange); color: var(--white); }
                .fin-item::before { content: '✦'; color: var(--orange); font-size: 7px; flex-shrink: 0; transition: color .25s; }
                .fin-item:hover::before { color: var(--white); }

                /* ══ CTA BAND ══ */
                .cta-band { background: var(--orange); padding: 84px 48px; text-align: center; }
                .cta-band h2 {
                  font-family: 'Cormorant Garamond', serif;
                  font-size: clamp(34px, 5vw, 68px); font-weight: 300; color: var(--white);
                  line-height: 1.1; max-width: 680px; margin: 0 auto;
                }
                .cta-band p { font-size: 15px; color: rgba(255,255,255,.72); margin-top: 14px; font-weight: 300; }
                .btn-white {
                  display: inline-block; margin-top: 36px;
                  background: var(--white); color: var(--orange);
                  padding: 15px 42px; border-radius: 100px; text-decoration: none;
                  font-size: 13px; font-weight: 700; letter-spacing: .5px;
                  transition: transform .25s, box-shadow .25s;
                }
                .btn-white:hover { transform: translateY(-3px) scale(1.03); box-shadow: 0 10px 28px rgba(0,0,0,.22); }

                /* ══ FOOTER ══ */
                footer { background: #080808; }
                .footer-map-wrap { width: 100%; height: 360px; overflow: hidden; }
                .footer-map-wrap iframe { width: 100%; height: 100%; border: none; display: block; }
                .footer-body {
                  max-width: 1160px; margin: 0 auto;
                  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px;
                  padding: 60px 48px 36px;
                }

                /* PARTNER SECTION */
                .footer-partners {
                  padding: 30px 20px;
                  text-align: center;
                  background: #111; /* adattalo al tuo footer */
                }

                .footer-partners h4 {
                  color: #fff;
                  margin-bottom: 20px;
                  font-size: 18px;
                  letter-spacing: 1px;
                }

                .partners-logos {
                  display: flex;
                  justify-content: center;
                  align-items: center;
                  flex-wrap: wrap;
                  gap: 30px;
                }

                .partners-logos img {
                  max-height: 50px;
                  opacity: 0.8;
                  transition: all 0.3s ease;
                  
                }

                .partners-logos img:hover {
                  opacity: 1;
                  filter: grayscale(0%);
                  transform: scale(1.05);
                }

                /* RESPONSIVE */
                @media (max-width: 768px) {
                  .partners-logos {
                    gap: 40px;
                  }

                  .partners-logos img {
                    max-height: 40px;
                  }
                }
                .footer-logo-col { display: flex; flex-direction: column; align-items: flex-start; }
                .footer-logo-mark { display: flex; align-items: center; }
                .footer-logo-mark img { max-width: 180px; height: auto; display: block; }
                .footer-logo-col .logo-emblem { background: var(--dark-2); margin-bottom: 8px; }
                .footer-logo-col .logo-name { color: rgba(255,255,255); }
                .footer-logo-col .cmyk { margin-bottom: 20px; }
                .footer-logo-col p { font-size: 15px; color: rgba(255, 255, 255); line-height: 1.7; }
                .footer-col h4 { font-size: 15px; letter-spacing: 3px; text-transform: uppercase; color: orange; margin-bottom: 16px; }
                .footer-col a,
                .footer-col p,
                .footer-col address p { display: block; font-size: 15px; color: rgba(255,255,255); line-height: 1.9; text-decoration: none; font-style: normal; transition: color .25s; }
                .footer-col a:hover { color: var(--orange); }
                .footer-hr { border: none; border-top: 1px solid rgba(255,255,255); margin: 0 48px; }
                .footer-bottom { padding: 18px 48px; text-align: center; font-size: 15px; color: rgba(255,255,255); }
                .footer-legal-links { margin-top: 8px; font-size: 13px; }
                .footer-bottom a { color: rgba(255,255,255,0.75); text-decoration: underline; margin: 0 4px; transition: color .25s; }
                .footer-bottom a:hover { color: var(--orange); }
                .footer-bottom .sep { margin: 0 8px; color: rgba(255,255,255,0.35); }

                /* ══ PAGINE LEGALI (Conditions / Cookies / Mentions) ══ */
                .legal-header {
                  background: var(--dark);
                  padding: 90px 48px 60px;
                  text-align: center;
                }
                .legal-header .sec-label { justify-content: center; }
                .legal-header h1 {
                  font-family: 'Cormorant Garamond', serif;
                  font-size: clamp(36px, 5vw, 58px); font-weight: 300;
                  color: var(--white); margin-top: 10px;
                }
                .legal-page { background: var(--off-white); }
                .legal-prose { max-width: 760px; margin: 0 auto; }
                .legal-updated { font-size: 13px; color: var(--dark-3); margin-bottom: 44px; }
                .legal-prose h3 {
                  font-family: 'Cormorant Garamond', serif; font-weight: 500;
                  font-size: 26px; color: var(--dark); margin: 42px 0 14px;
                }
                .legal-prose h3:first-of-type { margin-top: 0; }
                .legal-prose p, .legal-prose li {
                  font-size: 15px; line-height: 1.9; color: #5a5a5a; font-weight: 300;
                }
                .legal-prose p { margin-bottom: 14px; }
                .legal-prose ul { padding-left: 20px; margin-bottom: 14px; }
                .legal-prose li { margin-bottom: 8px; }
                .legal-prose a { color: var(--orange); text-decoration: underline; }
                .legal-prose strong { color: var(--dark); font-weight: 600; }
                .legal-disclaimer {
                  margin-top: 50px; padding: 20px 24px;
                  background: rgba(6,42,221,0.06); border-left: 3px solid var(--orange);
                  font-size: 13px; line-height: 1.8; color: var(--dark-3);
                }

                /* ══ REVEAL ══ */
                .reveal { opacity: 0; transform: translateY(32px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
                .reveal.from-left  { transform: translateX(-32px); }
                .reveal.from-right { transform: translateX(32px); }
                .reveal.visible { opacity: 1 !important; transform: translate(0,0) !important; }

                /* ══ RESPONSIVE ══ */
                @media (max-width: 1024px) {
                  .srv-grid { grid-template-columns: 1fr 1fr; }
                  .fin-grid  { grid-template-columns: repeat(2, 1fr); }
                  .footer-body { grid-template-columns: 1fr 1fr; gap: 32px; }
                  .about-grid { grid-template-columns: 1fr; gap: 48px; }
                }
                @media (max-width: 768px) {
                  .logo-emblem { width: 46px; height: 46px; }
                  .logo-name { font-size: 9px; }
                  .main-nav { top: calc(var(--logo-h) + 37px); }
                  .main-nav.scrolled { top: calc(var(--logo-h) + 27px); }
                  .nav-sep { display: none; }
                  .sec { padding: 64px 20px; }
                  .srv-grid { grid-template-columns: 1fr; }
                  .stats-grid { grid-template-columns: 1fr 1fr; }
                  .footer-body { grid-template-columns: 1fr; padding: 40px 20px 28px; gap: 28px; }
                  .footer-hr, .footer-bottom { padding-left: 20px; padding-right: 20px; }
                  .footer-map-wrap { height: 240px; }
                  .carrow { display: none; }
                  .srv-header { flex-direction: column; align-items: flex-start; }
                  .produits-head { padding: 0 20px 36px; }
                }
                @media (max-width: 480px) {
                  .fin-grid { grid-template-columns: 1fr; }
                  .stats-grid { grid-template-columns: 1fr; }
                }

                /* ─── FLOATING LANG BUTTON ─────────────────────── */
                #lang-float {
                  position: fixed;
                  bottom: 28px;
                  right: 28px;
                  z-index: 9999;
                  display: flex;
                  align-items: center;
                  gap: 10px;
                  background: #1a1a1a;
                  border: 1px solid #444;
                  border-radius: 50px;
                  padding: 10px 18px 10px 12px;
                  cursor: pointer;
                  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
                  transition: background .25s, border-color .25s, transform .2s;
                  font-family: inherit;
                  color: #fff;
                  text-decoration: none;
                }
                #lang-float:hover {
                  background: #2a2a2a;
                  border-color: #888;
                  transform: translateY(-2px);
                }
                #lang-float img {
                  width: 26px;
                  height: 18px;
                  object-fit: cover;
                  border-radius: 3px;
                  border: 1px solid #555;
                }
                #lang-float span {
                  font-size: .75rem;
                  letter-spacing: .18em;
                  text-transform: uppercase;
                  color: #ccc;
                  transition: color .25s;
                }
                #lang-float:hover span { color: #fff; }

                /* ─── BACK TO TOP ───────────────────────────────── */
               #btn-top {
  position: fixed;
  bottom: 28px;
  right: 110px;   /* ← sposta a sinistra del bottone lingua */
  z-index: 9999;
  width: 46px;
  height: 46px;
  background: #1a1a1a;
  border: 1px solid #444;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s, transform .2s, border-color .25s;

  
}
                #btn-top.visible {
                  opacity: 1;
                  visibility: visible;
                }
                #btn-top:hover {
                  border-color: #888;
                  transform: translateY(-2px);
                }
                #btn-top svg {
                  width: 18px;
                  height: 18px;
                  stroke: #ccc;
                  fill: none;
                  stroke-width: 2;
                  transition: stroke .25s;
                }
                #btn-top:hover svg { stroke: #fff; }