:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-soft: #f4f4f5;
  --ink: #09090b;
  --muted: #52525b;
  --line: #e4e4e7;
  --line-strong: #d4d4d8;
  --teal: #0f766e;
  --teal-dark: #115e59;
  --teal-soft: #ccfbf1;
  --danger: #b91c1c;
  --shadow: 0 1px 2px rgba(24, 24, 27, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
}

button,
input {
  font: inherit;
}

button,
label,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

.app-shell {
  display: flex;
  width: min(100%, 64rem);
  min-height: 100vh;
  margin: 0 auto;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.25rem 1rem;
}

.site-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand,
.eyebrow,
.label,
dt,
.record-meta {
  margin: 0;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.page-title {
  margin: 0.25rem 0 0;
  color: var(--ink);
  font-size: 2rem;
  font-weight: 950;
  letter-spacing: 0;
  line-height: 1.1;
}

.tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nav-link,
.primary-button,
.dark-button,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 800;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease, opacity 150ms ease;
}

.nav-link {
  min-height: 2.5rem;
  padding: 0 1rem;
  border-color: var(--line-strong);
  background: var(--surface);
  color: #3f3f46;
  font-size: 0.875rem;
}

.nav-link:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.nav-link.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.panel {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.section-title {
  margin: 0.25rem 0 0;
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 950;
  letter-spacing: 0;
  line-height: 1.2;
}

.icon-button {
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  border-color: var(--line);
  background: var(--surface-soft);
  color: #3f3f46;
}

.icon-button:hover {
  background: #e4e4e7;
}

.button-icon {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.ip-box {
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface-soft);
}

.label,
dt,
.record-meta {
  color: #71717a;
}

.ip-value {
  margin-top: 0.5rem;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(2rem, 9vw, 3rem);
  font-weight: 950;
  line-height: 1.05;
}

.action-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.primary-button,
.dark-button {
  min-height: 2.75rem;
  gap: 0.5rem;
  padding: 0 1rem;
  color: #ffffff;
  font-size: 0.875rem;
}

.primary-button {
  background: var(--teal);
}

.primary-button:hover {
  background: var(--teal-dark);
}

.dark-button {
  background: var(--ink);
}

.dark-button:hover {
  background: #27272a;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.nav-link:focus-visible,
.primary-button:focus-visible,
.dark-button:focus-visible,
.icon-button:focus-visible,
.text-input:focus-visible,
.record-toggle input:focus-visible + span {
  outline: 4px solid var(--teal-soft);
  outline-offset: 2px;
}

.status-text {
  min-height: 1.5rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.5rem;
}

.is-error,
.dns-error {
  color: var(--danger);
}

.dns-error {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.5rem;
}

.details-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
}

.detail-item {
  min-width: 0;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

dd {
  margin: 0.25rem 0 0;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-weight: 800;
}

.dns-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-input {
  width: 100%;
  min-height: 3rem;
  padding: 0 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.5rem;
  outline: none;
  background: var(--surface);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
}

.text-input:focus {
  border-color: var(--teal);
}

.text-input::placeholder {
  color: #a1a1aa;
}

.record-fieldset {
  margin: 1rem 0 0;
  padding: 0;
  border: 0;
}

.record-types {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.record-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.record-toggle span {
  display: inline-flex;
  min-width: 3.5rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  padding: 0 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.5rem;
  background: var(--surface);
  color: #3f3f46;
  cursor: pointer;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.875rem;
  font-weight: 800;
}

.record-toggle input:checked + span {
  border-color: var(--teal);
  background: #f0fdfa;
  color: var(--teal-dark);
}

.dns-results {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.result-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface);
}

.result-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.result-title {
  margin: 0;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 1.125rem;
  font-weight: 950;
  letter-spacing: 0;
}

.result-provider {
  margin: 0.25rem 0 0;
  color: #71717a;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.status-badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: #3f3f46;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.record-list {
  display: grid;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.record-item,
.empty-result {
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface-soft);
}

.empty-result {
  margin: 0.75rem 0 0;
  border-style: dashed;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.5rem;
}

.record-data {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.5rem;
}

.record-meta,
.authority-title {
  margin-top: 0.25rem;
}

.authority-title {
  margin: 1rem 0 0;
  color: #71717a;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

::selection {
  background: var(--teal-soft);
  color: var(--teal-dark);
}

@media (min-width: 640px) {
  .app-shell {
    padding-right: 1.5rem;
    padding-left: 1.5rem;
  }

  .site-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-title {
    font-size: 2.25rem;
  }

  .panel {
    padding: 1.5rem;
  }

  .action-row {
    flex-direction: row;
    align-items: center;
  }

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

  .dns-form {
    grid-template-columns: 1fr auto;
  }

  .result-header {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .app-shell {
    padding-right: 2rem;
    padding-left: 2rem;
  }

  .details-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}