.isolation-stack {
  display: grid;
  max-width: 900px;
  gap: 12px;
  margin: 34px 0;
}

.isolation-layer {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 17px;
  padding: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(115deg, color-mix(in srgb, var(--cyan) 7%, transparent), transparent 48%),
    color-mix(in srgb, var(--surface-solid) 76%, transparent);
}

.isolation-layer::after {
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(var(--cyan), var(--violet));
  content: "";
}

.isolation-layer i {
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--cyan) 30%, var(--line));
  border-radius: 12px;
  background: color-mix(in srgb, var(--cyan) 8%, transparent);
  color: var(--cyan);
  font-size: 1.1rem;
}

.isolation-layer strong,
.isolation-layer span {
  display: block;
}

.isolation-layer strong {
  color: var(--text);
  font-size: 0.83rem;
}

.isolation-layer span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.5;
}

.isolation-layer > em {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  font-style: normal;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hardening-grid {
  display: grid;
  max-width: 900px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
  margin: 32px 0;
}

.hardening-grid > div {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-solid) 74%, transparent);
}

.hardening-grid i {
  color: var(--cyan);
  font-size: 1.1rem;
}

.hardening-grid h3 {
  margin: 15px 0 8px;
  color: var(--text);
  font-size: 0.86rem;
}

.hardening-grid p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 0.72rem;
  line-height: 1.65;
}

.article-code {
  max-width: 900px;
  margin: 28px 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--cyan) 24%, var(--line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--bg-deep) 86%, transparent);
}

.article-code > div {
  padding: 13px 17px;
  border-bottom: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-code pre {
  max-width: 100%;
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  color: var(--muted-strong);
  white-space: pre;
}

.article-code pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.73rem;
  line-height: 1.72;
}

@media (max-width: 720px) {
  .isolation-layer {
    grid-template-columns: 43px minmax(0, 1fr);
  }

  .isolation-layer > em {
    grid-column: 2;
  }

  .hardening-grid {
    grid-template-columns: 1fr;
  }
}