:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  min-height: 100vh;
  background: radial-gradient(circle at top, #0b1227 0%, #0f172a 70%);
  color: #e5e7eb;
}
.app { max-width: 760px; margin: 0 auto; padding: 24px 16px 40px; }
h1 { margin: 0; font-size: 1.7rem; }
header p { margin-top: 8px; color: #9ca3af; }

.ip-card {
  margin-top: 24px;
  background: linear-gradient(135deg, #1e3a5f, #162032);
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 28px 24px;
}
.ip-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.ip-row-v6 {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #1e3a5f;
}
.ip-block {
  flex: 1;
  min-width: 0;
}
.ip-label {
  display: block;
  font-size: 0.78rem;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.ip-value {
  font-size: 2rem;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.02em;
  word-break: break-all;
}
.ip-value-sm {
  font-size: 1.1rem;
  color: #7dd3fc;
}
.copy-btn {
  border: 1px solid #334155;
  background: #1f2937;
  color: #e5e7eb;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  flex-shrink: 0;
}
.copy-btn:hover { border-color: #38bdf8; }

.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.details-grid.hidden { display: none; }
.detail-card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: 14px 16px;
}
.detail-label {
  font-size: 0.75rem;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.detail-value {
  font-size: 0.97rem;
  color: #e5e7eb;
  word-break: break-word;
}

.toolbar { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 10px; }
button {
  border: 1px solid #334155;
  background: #1f2937;
  color: #e5e7eb;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
}
button:hover { border-color: #38bdf8; }

.status { margin-top: 12px; font-size: 0.88rem; color: #9ca3af; min-height: 20px; }

.network-tools {
  margin-top: 28px;
}

.network-tools h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: #cbd5e1;
}

.network-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.network-card {
  display: block;
  text-decoration: none;
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: 12px 14px;
}

.network-card .name {
  color: #e5e7eb;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.network-card .desc {
  color: #9ca3af;
  font-size: 0.84rem;
  line-height: 1.4;
}

.network-card:hover {
  border-color: #38bdf8;
}

.seo-content {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #1f2937;
  color: #6b7280;
  font-size: 0.88rem;
  line-height: 1.6;
}
.seo-content h2 { font-size: 1rem; color: #9ca3af; margin-bottom: 8px; }
.seo-content p { margin: 6px 0; }