body {
  background: #f4efe6;
  color: #0d0d0d;
}

.installation-page {
  width: min(1100px, 92%);
  margin: 0 auto;
  padding: 120px 0 80px;
}

.installation-page .section-kicker {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: 18px;
}

.installation-page h1 {
  font-size: clamp(48px, 7vw, 86px);
  line-height: 0.95;
  letter-spacing: -3px;
  margin: 0;
}

.installation-page .intro {
  max-width: 680px;
  margin: 25px 0 55px;
  font-size: 17px;
  line-height: 1.8;
  opacity: 0.65;
}

.device-info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.device-info div {
  padding: 23px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.045);
  backdrop-filter: blur(12px);
  transition: 0.3s ease;
}

.device-info div:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.25);
}

.device-info span {
  display: block;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  opacity: 0.45;
  margin-bottom: 10px;
}

.device-info strong {
  display: block;
  font-size: 15px;
}

.guide-card {
  padding: 38px;
  margin-bottom: 20px;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,0.11);
  background: linear-gradient(
    135deg,
    rgba(255,255,255,0.07),
    rgba(255,255,255,0.025)
  );
  backdrop-filter: blur(15px);
}

.guide-card h2 {
  font-size: 30px;
  letter-spacing: -1px;
  margin: 0 0 28px;
}

.guide-card h3 {
  font-size: 16px;
  margin: 0 0 18px;
}

.guide-card p {
  font-size: 15px;
  line-height: 1.8;
  opacity: 0.7;
}

.guide-card ul,
.guide-card ol {
  margin: 0;
  padding-left: 25px;
}

.guide-card li {
  padding-left: 7px;
  margin-bottom: 17px;
  font-size: 15px;
  line-height: 1.7;
  opacity: 0.75;
}

.guide-card li::marker {
  opacity: 0.5;
}

.warning-card {
  padding: 32px 38px;
  margin: 25px 0;
  border-radius: 25px;
  border: 1px solid rgba(255,190,80,0.25);
  background: rgba(255,190,80,0.06);
}

.warning-card h2 {
  margin: 0 0 15px;
  font-size: 24px;
}

.warning-card p {
  margin: 8px 0;
  line-height: 1.7;
  font-size: 14px;
  opacity: 0.7;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  color: inherit;
  text-decoration: none;
  transition: 0.3s ease;
}

.back-button:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,0.1);
}

@media (max-width: 850px) {
  .installation-page {
    padding-top: 80px;
  }

  .device-info {
    grid-template-columns: repeat(2, 1fr);
  }

  .guide-card {
    padding: 28px;
  }
}

@media (max-width: 520px) {
  .installation-page {
    width: 90%;
    padding-top: 65px;
  }

  .installation-page h1 {
    font-size: 48px;
    letter-spacing: -2px;
  }

  .device-info {
    grid-template-columns: 1fr;
  }

  .guide-card,
  .warning-card {
    padding: 23px;
    border-radius: 20px;
  }

  .guide-card h2 {
    font-size: 25px;
  }
  .installation-page a {
  color: #0066cc;
  text-decoration: underline;
}

.installation-page a {
  font-size: 16px;
}
}