:root{
  --bg1:#eef4ff;
  --bg2:#f2fbff;
  --bg3:#eefcf7;
  --bg4:#f4f6ff;
  --card:rgba(255,255,255,.94);
  --card-border:rgba(255,255,255,.76);
  --text:#101828;
  --muted:#667085;
  --primary:#2457f5;
  --primary-2:#6f8fff;
  --accent:#16c7b1;
  --soft:#f4f7ff;
  --soft-2:#edf2ff;
  --shadow:0 18px 50px rgba(31,48,89,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Manrope',sans-serif;
  color:var(--text);
  min-height:100vh;
  background:
    radial-gradient(circle at 12% 10%, rgba(36,87,245,.08) 0, transparent 24%),
    radial-gradient(circle at 88% 14%, rgba(22,199,177,.06) 0, transparent 22%),
    radial-gradient(circle at 15% 88%, rgba(90,120,255,.06) 0, transparent 22%),
    linear-gradient(135deg,#eef4ff,#f2fbff 36%,#eefcf7 68%,#f4f6ff);
  transition:.3s ease;
}
body.dark{
  --card:rgba(13,18,30,.94);
  --card-border:rgba(255,255,255,.06);
  --text:#f5f7ff;
  --muted:#98a2b3;
  --primary:#6b8cff;
  --primary-2:#95abff;
  --accent:#25d5c3;
  --soft:#101723;
  --soft-2:#172132;
  --shadow:0 20px 50px rgba(0,0,0,.34);
  background:
    radial-gradient(circle at 12% 10%, rgba(76,107,255,.10) 0, transparent 24%),
    radial-gradient(circle at 88% 14%, rgba(37,213,195,.06) 0, transparent 22%),
    radial-gradient(circle at 15% 88%, rgba(76,107,255,.06) 0, transparent 22%),
    linear-gradient(135deg,#070b14,#0c1320 36%,#121926 68%,#141b28);
}
button{font:inherit}
a{text-decoration:none;color:inherit}
.page-shell{max-width:1320px;margin:0 auto;padding:18px 18px 50px}

.header-wrap{position:sticky;top:10px;z-index:1000}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;border-radius:24px;
  background:var(--card);border:1px solid var(--card-border);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);transition:.25s ease;
}
.topbar.scrolled{
  padding:12px 16px;border-radius:20px;box-shadow:0 12px 30px rgba(31,48,89,.12);
}
.topbar .logo,
.topbar .logo:link,
.topbar .logo:visited,
.topbar .logo:hover,
.topbar .logo:active{
  color:#111111 !important;
  background:none !important;
  -webkit-background-clip:initial !important;
  background-clip:initial !important;
  text-decoration:none !important;
  font-family:'Space Grotesk',sans-serif !important;
  font-size:30px !important;
  font-weight:700 !important;
  letter-spacing:-0.05em !important;
  transition:transform .2s ease, opacity .2s ease, color .2s ease !important;
}
body.dark .topbar .logo,
body.dark .topbar .logo:link,
body.dark .topbar .logo:visited,
body.dark .topbar .logo:hover,
body.dark .topbar .logo:active{
  color:#ffffff !important;
  background:none !important;
}
.topbar .logo:hover{
  transform:translateY(-1px) !important;
  opacity:.82 !important;
}

.nav-links{display:flex;align-items:center;gap:10px}
.topbar .nav-links a,
.topbar .nav-links a:link,
.topbar .nav-links a:visited,
.topbar .login-btn,
.topbar .login-btn:link,
.topbar .login-btn:visited,
.topbar .mobile-menu a,
.topbar .mobile-menu a:link,
.topbar .mobile-menu a:visited{
  color:#111111 !important;
  text-decoration:none !important;
}
body.dark .topbar .nav-links a,
body.dark .topbar .nav-links a:link,
body.dark .topbar .nav-links a:visited,
body.dark .topbar .login-btn,
body.dark .topbar .login-btn:link,
body.dark .topbar .login-btn:visited,
body.dark .topbar .mobile-menu a,
body.dark .topbar .mobile-menu a:link,
body.dark .topbar .mobile-menu a:visited{
  color:#ffffff !important;
}
.topbar .nav-links a,
.topbar .login-btn,
.topbar .mobile-menu a{
  position:relative !important;
  padding:11px 15px !important;
  border-radius:14px !important;
  font-weight:800 !important;
  font-size:14px !important;
  transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease !important;
}
.topbar .nav-links a:hover,
.topbar .login-btn:hover,
.topbar .mobile-menu a:hover{
  transform:translateY(-1px) !important;
  background:rgba(17,17,17,.06) !important;
  box-shadow:0 8px 18px rgba(17,17,17,.06) !important;
}
body.dark .topbar .nav-links a:hover,
body.dark .topbar .login-btn:hover,
body.dark .topbar .mobile-menu a:hover{
  background:rgba(255,255,255,.08) !important;
  box-shadow:0 8px 18px rgba(0,0,0,.18) !important;
}
.topbar .nav-links a.active,
.topbar .mobile-menu a.active{
  background:rgba(17,17,17,.08) !important;
  color:#111111 !important;
}
body.dark .topbar .nav-links a.active,
body.dark .topbar .mobile-menu a.active{
  background:rgba(255,255,255,.10) !important;
  color:#ffffff !important;
}
.topbar .login-btn{
  display:inline-flex !important;
  align-items:center !important;
  justify-content:center !important;
  background:transparent !important;
  border:1px solid rgba(17,17,17,.08) !important;
}
body.dark .topbar .login-btn{
  background:transparent !important;
  border:1px solid rgba(255,255,255,.10) !important;
}

.actions{display:flex;align-items:center;gap:12px;position:relative}
.topbar .theme-toggle,
.topbar .burger{
  width:46px !important;height:46px !important;border:none !important;border-radius:16px !important;
  background:var(--soft) !important;color:#111111 !important;
  display:flex !important;align-items:center !important;justify-content:center !important;cursor:pointer !important;
  transition:background .22s ease,transform .22s ease !important;
}
body.dark .topbar .theme-toggle,
body.dark .topbar .burger{
  color:#ffffff !important;
}
.topbar .theme-toggle:hover{
  transform:translateY(-1px) !important;
  background:rgba(17,17,17,.06) !important;
}
body.dark .topbar .theme-toggle:hover{
  background:rgba(255,255,255,.08) !important;
}
.topbar .theme-toggle svg{
  width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;
}
.topbar .burger{
  display:none !important;
  flex-direction:column !important;
  gap:5px !important;
}
.topbar .burger span{
  width:21px !important;height:2px !important;background:#111111 !important;border-radius:2px !important;transition:.25s ease !important;
}
body.dark .topbar .burger span{
  background:#ffffff !important;
}
.topbar .burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.topbar .burger.active span:nth-child(2){opacity:0}
.topbar .burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-menu{
  display:none;position:absolute;right:0;top:62px;width:230px;padding:10px;border-radius:20px;
  background:var(--card);border:1px solid var(--card-border);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow);
}
.mobile-menu.show{display:flex;flex-direction:column;gap:8px;animation:menuIn .18s ease}
@keyframes menuIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}

.contacts-hero{padding:54px 0 26px;text-align:center}
.contacts-badge{
  display:inline-flex;align-items:center;justify-content:center;padding:9px 14px;border-radius:999px;
  background:rgba(36,87,245,.08);color:var(--primary);font-size:13px;font-weight:800;margin-bottom:18px;
}
body.dark .contacts-badge{background:rgba(107,140,255,.12)}
.contacts-title{
  font-family:'Space Grotesk',sans-serif;font-size:56px;line-height:.98;letter-spacing:-.06em;max-width:880px;margin:0 auto 16px;
  color:var(--text);
}
.contacts-title span{color:var(--primary)}
.contacts-subtitle{
  max-width:980px;margin:0 auto;color:var(--muted);font-size:17px;line-height:1.75;
}

.contacts-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:28px}
.contact-card{
  background:var(--card);border:1px solid var(--card-border);border-radius:28px;box-shadow:var(--shadow);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:26px;
}
.contact-card.large{grid-column:1 / -1}
.contact-title{font-family:'Space Grotesk',sans-serif;font-size:28px;margin-bottom:10px;color:var(--text)}
.contact-sub{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:20px}
.contact-list{display:grid;gap:14px}
.contact-row{
  display:grid;grid-template-columns:180px 1fr auto;align-items:center;gap:14px;
  padding:16px 18px;border-radius:20px;background:linear-gradient(180deg,var(--soft),var(--soft-2));
}
.contact-meta{
  display:flex;align-items:center;gap:10px;font-size:13px;font-weight:800;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em;
}
.icon-box{
  width:38px;height:38px;border-radius:12px;background:rgba(36,87,245,.08);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
}
.icon-box svg{
  width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
}
.contact-value{font-size:16px;font-weight:700;color:var(--text);word-break:break-word}
.contact-action{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 16px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;font-size:14px;font-weight:800;white-space:nowrap;
  transition:transform .22s ease,filter .22s ease;
}
.contact-action:hover{
  transform:translateY(-1px);
  filter:brightness(1.03);
}
.contact-action.secondary{
  background:var(--soft);
  color:var(--text);
  border:1px solid rgba(36,87,245,.08);
}
.channel-card{
  margin-top:22px;background:var(--card);border:1px solid var(--card-border);border-radius:28px;
  box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:26px;
}
.channel-wrap{
  display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;
  border-radius:22px;background:linear-gradient(180deg,var(--soft),var(--soft-2));
}
.channel-left{display:flex;align-items:flex-start;gap:14px}
.channel-title{font-family:'Space Grotesk',sans-serif;font-size:24px;margin-bottom:6px;color:var(--text)}
.channel-text{color:var(--muted);font-size:15px;line-height:1.7;max-width:760px}
.channel-btn{
  display:inline-flex;align-items:center;justify-content:center;min-width:190px;padding:14px 18px;border-radius:16px;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;
  transition:transform .22s ease,filter .22s ease;
}
.channel-btn:hover{
  transform:translateY(-1px);
  filter:brightness(1.03);
}

/* hard color correction for Tilda */
.topbar .nav-links a,
.topbar .login-btn,
.topbar .mobile-menu a,
.contact-title,
.channel-title,
.contact-value,
.contact-action.secondary,
.channel-text,
.contact-sub,
.contacts-subtitle,
.contacts-title,
.contact-meta{
  color:#111111 !important;
}
body.dark .topbar .nav-links a,
body.dark .topbar .login-btn,
body.dark .topbar .mobile-menu a,
body.dark .contact-title,
body.dark .channel-title,
body.dark .contact-value,
body.dark .contact-action.secondary,
body.dark .channel-text,
body.dark .contact-sub,
body.dark .contacts-subtitle,
body.dark .contacts-title,
body.dark .contact-meta{
  color:#ffffff !important;
}
.contact-sub,
.contacts-subtitle,
.channel-text,
.contact-meta{
  color:#4b5563 !important;
}
body.dark .contact-sub,
body.dark .contacts-subtitle,
body.dark .channel-text,
body.dark .contact-meta{
  color:#cbd5e1 !important;
}
.contact-action{color:#ffffff !important}
.contact-action.secondary{
  background:#ffffff !important;
  color:#111111 !important;
  border:1px solid rgba(17,17,17,.08) !important;
}
body.dark .contact-action.secondary{
  background:#161f2d !important;
  color:#ffffff !important;
  border:1px solid rgba(255,255,255,.08) !important;
}
.channel-btn{color:#ffffff !important}
.contact-card a,
.channel-card a{text-decoration:none !important}

@media(max-width:900px){
  .contacts-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-links,.login-btn{display:none}
  .topbar .burger{display:flex !important}
  .mobile-menu{width:210px}
  .contacts-title{font-size:40px}
  .contacts-subtitle{font-size:15px}
  .contact-row{grid-template-columns:1fr;align-items:flex-start}
  .channel-wrap{flex-direction:column;align-items:flex-start}
}

/* Footer */
.bitvier-footer{
  position:relative;
  padding:34px 18px 26px;
  overflow:hidden;
}

.bitvier-footer-glow{
  position:absolute;
  inset:auto 0 0 0;
  height:220px;
  background:
    radial-gradient(circle at 15% 50%, rgba(36,87,245,.08), transparent 35%),
    radial-gradient(circle at 85% 50%, rgba(22,199,177,.06), transparent 35%);
  pointer-events:none;
}

.bitvier-footer-shell{
  position:relative;
  z-index:2;
  max-width:1320px;
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  gap:24px;
  padding:24px;
  border-radius:28px;
  background:rgba(255,255,255,.88);
  border:1px solid rgba(255,255,255,.72);
  box-shadow:0 18px 50px rgba(31,48,89,.10);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}

body.dark .bitvier-footer-shell{
  background:rgba(13,18,30,.9);
  border:1px solid rgba(255,255,255,.06);
  box-shadow:0 18px 50px rgba(0,0,0,.34);
}

.bitvier-footer-left{
  max-width:760px;
}

.bitvier-footer-logo,
.bitvier-footer-logo:link,
.bitvier-footer-logo:visited,
.bitvier-footer-logo:hover,
.bitvier-footer-logo:active{
  display:inline-block;
  margin-bottom:14px;
  font-family:'Space Grotesk',sans-serif;
  font-size:30px;
  font-weight:700;
  letter-spacing:-0.05em;
  color:#111111 !important;
  text-decoration:none !important;
  background:none !important;
  -webkit-background-clip:initial !important;
  background-clip:initial !important;
}

body.dark .bitvier-footer-logo,
body.dark .bitvier-footer-logo:link,
body.dark .bitvier-footer-logo:visited,
body.dark .bitvier-footer-logo:hover,
body.dark .bitvier-footer-logo:active{
  color:#ffffff !important;
}

.bitvier-footer-text{
  font-size:13px;
  line-height:1.7;
  color:#4b5563 !important;
  margin-bottom:18px;
}

body.dark .bitvier-footer-text{
  color:#cbd5e1 !important;
}

.bitvier-footer-partners{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.bitvier-partner{
  width:88px;
  height:62px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:8px;
  border-radius:16px;
  background:linear-gradient(180deg,#f4f7ff,#edf2ff);
  border:1px solid rgba(36,87,245,.06);
  transition:transform .2s ease, box-shadow .2s ease;
}

.bitvier-partner:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 20px rgba(36,87,245,.08);
}

body.dark .bitvier-partner{
  background:linear-gradient(180deg,#101723,#172132);
  border:1px solid rgba(255,255,255,.05);
}

.bitvier-partner img{
  width:100%;
  height:100%;
  object-fit:contain;
  border-radius:8px;
}

.bitvier-footer-right{
  min-width:300px;
  display:flex;
  flex-direction:column;
  gap:14px;
}

.bitvier-footer-card{
  padding:18px;
  border-radius:20px;
  background:linear-gradient(180deg,#f4f7ff,#edf2ff);
  border:1px solid rgba(36,87,245,.06);
}

body.dark .bitvier-footer-card{
  background:linear-gradient(180deg,#101723,#172132);
  border:1px solid rgba(255,255,255,.05);
}

.bitvier-footer-label{
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.06em;
  font-weight:800;
  color:#4b5563 !important;
  margin-bottom:8px;
}

body.dark .bitvier-footer-label{
  color:#cbd5e1 !important;
}

.bitvier-footer-value,
.bitvier-footer-value:link,
.bitvier-footer-value:visited{
  font-size:18px;
  font-weight:800;
  color:#111111 !important;
  word-break:break-word;
  text-decoration:none !important;
}

body.dark .bitvier-footer-value,
body.dark .bitvier-footer-value:link,
body.dark .bitvier-footer-value:visited{
  color:#ffffff !important;
}

.bitvier-footer-telegram,
.bitvier-footer-telegram:link,
.bitvier-footer-telegram:visited{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:800;
  color:#111111 !important;
  text-decoration:none !important;
}

body.dark .bitvier-footer-telegram,
body.dark .bitvier-footer-telegram:link,
body.dark .bitvier-footer-telegram:visited{
  color:#ffffff !important;
}

.bitvier-footer-telegram img{
  width:22px;
  height:22px;
  object-fit:contain;
}

@media(max-width:900px){
  .bitvier-footer-shell{
    flex-direction:column;
  }
  .bitvier-footer-right{
    min-width:auto;
  }
}

@media(max-width:640px){
  .bitvier-footer{
    padding:28px 14px 18px;
  }

  .bitvier-footer-shell{
    padding:18px;
    border-radius:22px;
  }

  .bitvier-partner{
    width:72px;
    height:52px;
    border-radius:14px;
  }

  .bitvier-footer-value{
    font-size:16px;
  }

  .bitvier-footer-telegram{
    font-size:15px;
  }
}