.security-visual {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  background:
    radial-gradient(circle at 50% 50%, rgba(91, 42, 134, 0.32), transparent 34%),
    linear-gradient(145deg, rgba(19, 40, 61, 0.92), rgba(8, 22, 35, 0.98));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 28px 70px rgba(0, 0, 0, 0.22);
  isolation: isolate;
}

.security-visual::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  content: "";
  mask-image: radial-gradient(circle, #000 15%, transparent 78%);
}

.security-links {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.security-links path,
.security-links circle {
  fill: none;
  stroke: rgba(25, 166, 161, 0.58);
  stroke-width: 2;
  stroke-dasharray: 7 9;
  vector-effect: non-scaling-stroke;
}

.security-links circle {
  stroke: rgba(255, 255, 255, 0.11);
  stroke-dasharray: 3 8;
}

.security-core-card,
.security-node {
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--white);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.security-core-card {
  top: 50%;
  left: 50%;
  width: 158px;
  min-height: 166px;
  align-items: center;
  padding: 24px 16px;
  transform: translate(-50%, -50%);
  border-color: rgba(255, 255, 255, 0.22);
  border-radius: 28px;
  background: linear-gradient(145deg, #66309a, #3a1a60);
  box-shadow: 0 24px 65px rgba(72, 30, 116, 0.5);
  text-align: center;
}

.security-lock {
  display: grid;
  width: 58px;
  height: 58px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 18px;
  background: rgba(7, 21, 34, 0.38);
}

.security-lock svg {
  width: 38px;
  height: 38px;
  fill: none;
  stroke: var(--white);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 4;
}

.security-core-card strong,
.security-node strong {
  color: var(--white);
  font-size: 0.8rem;
  line-height: 1.2;
}

.security-core-card small,
.security-node small {
  margin-top: 5px;
  color: #aebfcb;
  font-size: 0.65rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.security-core-card small {
  color: #e0d3ee;
}

.security-node {
  width: 130px;
  min-height: 78px;
  padding: 15px 16px 14px 33px;
  border-radius: 15px;
  background: rgba(11, 29, 45, 0.86);
}

.security-node > span {
  position: absolute;
  top: 18px;
  left: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 5px rgba(25, 166, 161, 0.13), 0 0 18px rgba(25, 166, 161, 0.72);
}

.security-node-guest { top: 7%; left: 5%; }
.security-node-business { top: 7%; right: 5%; }
.security-node-cloud { right: 5%; bottom: 7%; }
.security-node-backup { bottom: 7%; left: 5%; }

.security-node-business > span,
.security-node-backup > span {
  background: #ff956d;
  box-shadow: 0 0 0 5px rgba(255, 149, 109, 0.12), 0 0 18px rgba(255, 149, 109, 0.55);
}

@media (max-width: 1080px) {
  .split-section { gap: 54px; }
  .security-node { width: 122px; }
}

@media (max-width: 860px) {
  .security-visual {
    width: min(100%, 620px);
    min-height: 470px;
    margin-inline: auto;
    transform: none;
  }
}

@media (max-width: 580px) {
  .security-visual {
    min-height: 400px;
    border-radius: 22px;
    transform: none;
  }

  .security-core-card {
    width: 124px;
    min-height: 132px;
    padding: 18px 10px;
    border-radius: 22px;
  }

  .security-lock {
    width: 46px;
    height: 46px;
    margin-bottom: 10px;
    border-radius: 14px;
  }

  .security-lock svg {
    width: 31px;
    height: 31px;
  }

  .security-node {
    width: 108px;
    min-height: 66px;
    padding: 12px 8px 11px 26px;
  }

  .security-node > span {
    top: 16px;
    left: 11px;
    width: 7px;
    height: 7px;
  }

  .security-node strong,
  .security-core-card strong { font-size: 0.7rem; }
  .security-node small { display: none; }
  .security-node-guest,
  .security-node-backup { left: 3%; }
  .security-node-business,
  .security-node-cloud { right: 3%; }
}