.ip-hero {
  position: relative;
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(72px, 9vw, 120px);
  overflow-x: clip;
  background:
    radial-gradient(circle at 18% 12%, var(--color-glow), var(--color-transparent) 34%),
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg));
}

.ip-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -180px;
  width: 460px;
  height: 460px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-pill);
  opacity: 0.58;
  pointer-events: none;
}

.ip-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin-inline: auto;
  text-align: center;
}

.ip-hero-copy h1 {
  margin: 18px 0 16px;
}

.ip-hero-copy p {
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 0;
  font-size: clamp(16px, 1.8vw, 19px);
}

.ip-tool-shell {
  position: relative;
  z-index: 2;
  max-width: 1040px;
  margin: clamp(42px, 6vw, 72px) auto 0;
  padding: clamp(20px, 3vw, 34px);
  overflow: hidden;
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(var(--color-grid-strong) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid-strong) 1px, var(--color-transparent) 1px),
    linear-gradient(145deg, var(--color-panel-raised), var(--color-bg-deep));
  background-size: 38px 38px, 38px 38px, 100% 100%;
  box-shadow: var(--shadow-panel), var(--shadow-inset);
}

.ip-tool-shell::before {
  content: "";
  position: absolute;
  top: -170px;
  left: -80px;
  width: 420px;
  height: 300px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-glow), var(--color-transparent) 70%);
  pointer-events: none;
}

.ip-tool-head {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-border);
}

.ip-tool-head h2 {
  margin: 6px 0 0;
  font-size: clamp(28px, 3.4vw, 42px);
}

.ip-tool-label,
.ip-index-label,
.ip-step-tag {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.ip-query-state {
  min-height: 34px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
  padding-inline: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-bg-deep);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.ip-query-state.is-error .status-dot {
  background: var(--color-error);
  box-shadow: 0 0 12px var(--color-error);
}

.ip-query-state.is-ready .status-dot {
  background: var(--color-success);
  box-shadow: 0 0 12px var(--color-success);
}

.ip-result-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-top: 22px;
}

.ip-result-item {
  min-width: 0;
  min-height: 142px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-content: center;
  column-gap: 14px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-inset);
}

.ip-result-primary {
  border-color: var(--color-border-bright);
  background:
    radial-gradient(circle at 0 0, var(--color-glow-soft), var(--color-transparent) 56%),
    var(--color-panel-raised);
}

.ip-result-icon {
  width: 42px;
  height: 42px;
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  background: var(--color-highlight);
}

.ip-result-icon svg {
  width: 23px;
  height: 23px;
}

.ip-result-label {
  align-self: end;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.ip-result-value {
  min-width: 0;
  align-self: start;
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.4;
}

.ip-address-value {
  color: var(--color-accent-soft);
  font-family: var(--font-mono);
}

.ip-tool-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
}

.ip-copy-feedback {
  margin: 0;
  color: var(--color-success);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-align: right;
}

.ip-fallback {
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid var(--color-error);
  border-radius: var(--radius-md);
  background: var(--color-highlight);
}

.ip-fallback strong {
  display: block;
  margin-bottom: 4px;
}

.ip-fallback p {
  margin-bottom: 0;
}

.ip-explain-layout {
  display: grid;
  grid-template-columns: minmax(180px, 0.32fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.ip-explain-index {
  position: sticky;
  top: var(--toc-top);
  display: grid;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-inset);
}

.ip-explain-index .ip-index-label {
  margin-bottom: 14px;
}

.ip-explain-index a {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
  padding-block: 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.86rem;
  transition: color var(--transition-fast);
}

.ip-explain-index a:last-child {
  border-bottom: 0;
}

.ip-explain-index a:hover {
  color: var(--color-accent-soft);
}

.ip-explain-index a span {
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.ip-explain-content {
  min-width: 0;
  border-top: 1px solid var(--color-border);
}

.ip-explain-row {
  position: relative;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 20px;
  padding-block: 28px;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--toc-top) + 32px);
}

.ip-row-marker {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 9px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  box-shadow: 0 0 18px var(--color-glow);
}

.ip-row-marker::after {
  content: "";
  position: absolute;
  top: 11px;
  left: 5px;
  width: 1px;
  height: 96px;
  background: linear-gradient(var(--color-accent-dark), var(--color-transparent));
}

.ip-explain-row:last-child .ip-row-marker::after {
  display: none;
}

.ip-explain-row h3 {
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 500;
}

.ip-explain-row p {
  margin-bottom: 0;
}

.ip-dns-section {
  border-top: 1px solid var(--color-grid-strong);
  border-bottom: 1px solid var(--color-grid-strong);
  background:
    radial-gradient(circle at 82% 18%, var(--color-glow-soft), var(--color-transparent) 32%),
    var(--color-bg-deep);
}

.ip-dns-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(36px, 7vw, 96px);
  align-items: start;
}

.ip-dns-grid .section-heading {
  position: sticky;
  top: var(--toc-top);
  margin-bottom: 0;
}

.ip-dns-flow {
  display: grid;
  gap: 12px;
}

.ip-dns-step {
  position: relative;
  padding: 24px 24px 24px 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-inset);
}

.ip-dns-step::before {
  content: "";
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: 18px;
  width: 1px;
  background: var(--color-accent-dark);
  box-shadow: 0 0 10px var(--color-accent-dark);
}

.ip-dns-step h3 {
  margin: 8px 0;
  font-size: 1.18rem;
}

.ip-dns-step p {
  margin-bottom: 0;
}

.ip-scope-note {
  max-width: 760px;
  display: flex;
  gap: 16px;
  margin-top: 30px;
  margin-left: auto;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-highlight);
}

.ip-scope-note svg {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  color: var(--color-accent);
}

.ip-scope-note strong {
  display: block;
  margin-bottom: 4px;
}

.ip-scope-note p {
  margin-bottom: 0;
}

.ip-privacy-panel {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 22px;
  max-width: 900px;
  margin-inline: auto;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, var(--color-highlight), var(--color-transparent)),
    var(--color-panel-raised);
  box-shadow: var(--shadow-card), var(--shadow-inset);
}

.ip-privacy-mark {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  background: var(--color-highlight);
}

.ip-privacy-mark svg {
  width: 30px;
  height: 30px;
}

.ip-privacy-panel h2 {
  margin: 8px 0 10px;
  font-size: clamp(28px, 3.6vw, 42px);
}

.ip-privacy-panel p {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .ip-hero::after {
    display: none;
  }

  .ip-explain-layout,
  .ip-dns-grid {
    grid-template-columns: 1fr;
  }

  .ip-explain-index,
  .ip-dns-grid .section-heading {
    position: static;
  }

  .ip-explain-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ip-explain-index .ip-index-label {
    grid-column: 1 / -1;
  }

  .ip-explain-index a:nth-last-child(2) {
    border-bottom: 0;
  }
}

@media (max-width: 640px) {
  .ip-tool-shell {
    padding: 16px;
    border-radius: var(--radius-lg);
  }

  .ip-tool-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .ip-result-grid {
    grid-template-columns: 1fr;
  }

  .ip-result-item {
    min-height: 122px;
    padding: 16px;
  }

  .ip-tool-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .ip-copy-feedback {
    min-height: 20px;
    text-align: left;
  }

  .ip-explain-index {
    display: flex;
    gap: 0;
    overflow-x: auto;
  }

  .ip-explain-index .ip-index-label {
    display: none;
  }

  .ip-explain-index a {
    min-width: 150px;
    flex: 0 0 auto;
    border-right: 1px solid var(--color-border);
    border-bottom: 0;
  }

  .ip-explain-row {
    gap: 12px;
  }

  .ip-privacy-panel {
    grid-template-columns: 1fr;
  }

  .ip-privacy-mark {
    width: 52px;
    height: 52px;
  }
}