.login-shell {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 20%, rgba(86, 166, 255, .42), transparent 34%),
    radial-gradient(circle at 82% 78%, rgba(77, 94, 255, .34), transparent 38%),
    linear-gradient(135deg, #071b43 0%, #0d4f9f 48%, #152a68 100%);
}
.login-shell::before,.login-shell::after {
  content: "";
  position: absolute;
  z-index: -1;
  pointer-events: none;
  opacity: .62;
  will-change: transform;
}
.login-shell::before {
  width: 42vmax;
  height: 42vmax;
  left: -12vmax;
  top: -16vmax;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 30%;
  background: linear-gradient(145deg,rgba(255,255,255,.18),rgba(87,185,255,.04));
  box-shadow: 38vmax 6vmax 0 -12vmax rgba(101,197,255,.22),68vmax 32vmax 0 -17vmax rgba(255,255,255,.16);
  transform: rotate(18deg);
  animation: login-shape-one 18s ease-in-out infinite alternate;
}
.login-shell::after {
  width: 34vmax;
  height: 34vmax;
  right: -9vmax;
  bottom: -13vmax;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.24);
  background: repeating-linear-gradient(45deg,transparent 0 24px,rgba(255,255,255,.08) 25px 26px);
  box-shadow: -54vmax -22vmax 0 -13vmax rgba(79,180,255,.18),-22vmax -48vmax 0 -9vmax rgba(255,255,255,.10);
  animation: login-shape-two 22s ease-in-out infinite alternate;
}
.login-card {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,.94);
  border-color: rgba(255,255,255,.72);
  box-shadow: 0 28px 80px rgba(0,12,42,.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.login-network {
  position: absolute;
  z-index: 0;
  inset: -8%;
  width: 116%;
  height: 116%;
  overflow: visible;
  pointer-events: none;
  opacity: .34;
  filter: drop-shadow(0 1px 1px rgba(15,45,78,.10));
  -webkit-mask-image: radial-gradient(ellipse 31% 46% at center,transparent 0 70%,rgba(0,0,0,.12) 82%,#000 100%);
  mask-image: radial-gradient(ellipse 31% 46% at center,transparent 0 70%,rgba(0,0,0,.12) 82%,#000 100%);
}
.network-mesh {
  transform-origin: center;
  animation: network-drift 28s ease-in-out infinite alternate;
}
.network-lines path {
  fill: none;
  stroke: #123c67;
  stroke-width: .9;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: network-line-breathe 7s ease-in-out infinite alternate;
}
.network-nodes {
  fill: #0e426f;
}
.network-nodes circle {
  transform-box: fill-box;
  transform-origin: center;
  animation: network-pulse 3.8s ease-in-out infinite alternate;
}
.network-nodes circle:nth-child(3n) { animation-delay: -1.2s; }
.network-nodes circle:nth-child(4n) { animation-delay: -2.5s; }
@keyframes network-drift {
  0% { transform: translate3d(-2%,1%,0) rotate(-1deg) scale(1); }
  50% { transform: translate3d(3%,-2%,0) rotate(1.5deg) scale(1.04); }
  100% { transform: translate3d(-1%,3%,0) rotate(-.5deg) scale(.98); }
}
@keyframes network-line-breathe {
  from { opacity: .62; }
  to { opacity: 1; }
}
@keyframes network-pulse {
  from { transform: scale(.85); opacity: .62; }
  to { transform: scale(1.15); opacity: 1; }
}
@keyframes login-shape-one {
  0% { transform: translate3d(0,0,0) rotate(18deg) scale(1); }
  50% { transform: translate3d(8vmax,5vmax,0) rotate(42deg) scale(1.08); }
  100% { transform: translate3d(3vmax,12vmax,0) rotate(72deg) scale(.92); }
}
@keyframes login-shape-two {
  0% { transform: translate3d(0,0,0) rotate(0deg) scale(1); }
  50% { transform: translate3d(-7vmax,-4vmax,0) rotate(-28deg) scale(1.12); }
  100% { transform: translate3d(-2vmax,-10vmax,0) rotate(-55deg) scale(.96); }
}
@media (prefers-reduced-motion: reduce) {
  .login-shell::before,.login-shell::after { animation: none; }
}
@media (max-width: 520px) {
  .login-shell::before { width: 56vmax; height: 56vmax; }
  .login-shell::after { width: 48vmax; height: 48vmax; }
}

/* Светлая геометрическая композиция */
.login-shell {
  background: linear-gradient(145deg,#f5f6f8 0%,#fff 46%,#eceff3 100%);
}
.login-shell::before,.login-shell::after { display: none; }
.login-geometry {
  position: absolute;
  inset: -12%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.login-geometry i {
  position: absolute;
  display: block;
  width: 68%;
  height: 58%;
  background: linear-gradient(145deg,rgba(255,255,255,1),rgba(218,222,228,.76));
  filter:
    drop-shadow(0 20px 18px rgba(29,36,47,.34))
    drop-shadow(0 4px 3px rgba(22,29,40,.22));
  transform-origin: 50% 50%;
  will-change: transform;
}
.login-geometry i:nth-child(1) {
  left: -18%; top: -7%;
  clip-path: polygon(7% 0,100% 13%,64% 100%,0 67%);
  animation: facet-one 18s ease-in-out infinite alternate;
}
.login-geometry i:nth-child(2) {
  right: -16%; top: -18%;
  clip-path: polygon(22% 0,100% 12%,77% 100%,0 76%);
  animation: facet-two 21s ease-in-out infinite alternate;
}
.login-geometry i:nth-child(3) {
  left: 6%; top: 28%;
  clip-path: polygon(18% 0,100% 35%,68% 100%,0 73%);
  animation: facet-three 24s ease-in-out infinite alternate;
}
.login-geometry i:nth-child(4) {
  right: -7%; top: 38%;
  clip-path: polygon(0 29%,81% 0,100% 78%,24% 100%);
  animation: facet-four 19s ease-in-out infinite alternate;
}
.login-geometry i:nth-child(5) {
  left: -20%; bottom: -23%;
  clip-path: polygon(0 22%,78% 0,100% 100%,19% 75%);
  animation: facet-five 23s ease-in-out infinite alternate;
}
.login-geometry i:nth-child(6) {
  right: 13%; bottom: -25%;
  clip-path: polygon(23% 0,100% 24%,72% 100%,0 66%);
  animation: facet-six 26s ease-in-out infinite alternate;
}
.login-card {
  background: rgba(255,255,255,.91);
  border: 1px solid rgba(255,255,255,.94);
  box-shadow: 0 24px 70px rgba(34,42,54,.20);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
@keyframes facet-one {
  from { transform: translate3d(-2%,0,0) rotate(-8deg); }
  to { transform: translate3d(9%,7%,0) rotate(-2deg); }
}
@keyframes facet-two {
  from { transform: translate3d(4%,-2%,0) rotate(12deg); }
  to { transform: translate3d(-8%,8%,0) rotate(5deg); }
}
@keyframes facet-three {
  from { transform: translate3d(-4%,5%,0) rotate(17deg); }
  to { transform: translate3d(7%,-5%,0) rotate(24deg); }
}
@keyframes facet-four {
  from { transform: translate3d(5%,0,0) rotate(-15deg); }
  to { transform: translate3d(-7%,-8%,0) rotate(-8deg); }
}
@keyframes facet-five {
  from { transform: translate3d(0,5%,0) rotate(8deg); }
  to { transform: translate3d(11%,-6%,0) rotate(14deg); }
}
@keyframes facet-six {
  from { transform: translate3d(3%,2%,0) rotate(-4deg); }
  to { transform: translate3d(-9%,-7%,0) rotate(-11deg); }
}
@media (prefers-reduced-motion: reduce) {
  .login-geometry i,.network-mesh,.network-lines path,.network-nodes circle { animation: none; }
}
@media (max-width: 520px) {
  .login-geometry { inset: -6% -40%; }
  .login-geometry i { width: 82%; height: 48%; }
  .login-network {
    inset: -3% -45%;
    width: 190%;
    height: 106%;
    opacity: .24;
    -webkit-mask-image: radial-gradient(ellipse 25% 45% at center,transparent 0 72%,rgba(0,0,0,.12) 84%,#000 100%);
    mask-image: radial-gradient(ellipse 25% 45% at center,transparent 0 72%,rgba(0,0,0,.12) 84%,#000 100%);
  }
  .login-card { background: rgba(255,255,255,.94); }
}

/* Серые плоскости и световая сеть */
.login-shell {
  background: linear-gradient(135deg,#e2e3e5 0%,#fafafa 48%,#d7d9dc 100%);
}
.login-geometry { inset: -18%; opacity: .78; }
.login-geometry i {
  width: 76%;
  height: 66%;
  background: linear-gradient(145deg,rgba(105,109,116,.56),rgba(204,207,211,.26));
  filter: drop-shadow(0 14px 10px rgba(50,54,61,.12));
}
.login-geometry i:nth-child(2),
.login-geometry i:nth-child(5) {
  background: linear-gradient(145deg,rgba(235,236,238,.70),rgba(133,138,145,.30));
}
.login-geometry i:nth-child(3),
.login-geometry i:nth-child(6) {
  background: linear-gradient(145deg,rgba(123,128,135,.43),rgba(247,247,248,.38));
}
.login-network {
  opacity: .72;
  filter: drop-shadow(0 0 4px rgba(255,255,255,.72));
  -webkit-mask-image: none;
  mask-image: none;
}
.network-lines path {
  stroke: rgba(255,255,255,.96);
  stroke-width: .85;
}
.network-nodes {
  fill: #fff;
  filter: drop-shadow(0 0 5px rgba(255,255,255,.96));
}
.login-card {
  background: rgba(255,255,255,.93);
  border-color: rgba(255,255,255,.96);
  box-shadow: 0 28px 80px rgba(64,68,76,.24);
}
.login-version {
  margin: 3px 0 0;
  text-align: center;
  color: #98a2b1;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .035em;
}
.login-product-logo {
  display: block;
  width: min(330px, 100%);
  height: auto;
  margin: 8px auto 2px;
}
.brand {
  align-items: flex-start;
  flex-direction: column;
  gap: 3px;
}
.menu-product-logo {
  display: block;
  width: 100%;
  height: auto;
}
.brand > small {
  padding-left: 4px;
  font-size: 11px;
  letter-spacing: .04em;
}
@media (max-width: 520px) {
  .login-geometry { inset: -8% -52%; opacity: .68; }
  .login-network {
    opacity: .58;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .login-product-logo { width: min(285px, 100%); }
}