:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4d;
  --text: #e6edf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --ok: #22c55e;
  --err: #ef4444;
  --font: "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "Consolas", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: linear-gradient(160deg, #0a0e14 0%, var(--bg) 40%, #121a24 100%);
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.wrap-wide {
  max-width: 1100px;
}

.site-header .site-brand {
  margin: 0 0 0.35rem;
}

.site-logo {
  display: block;
  max-height: 3rem;
  width: auto;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

header h1 .sub {
  font-weight: 500;
  color: var(--muted);
  font-size: 0.95rem;
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

header p.tagline {
  margin-top: 0.25rem;
  font-size: 0.88rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.row {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .row.cols-2 {
    grid-template-columns: 1fr 1fr;
  }
}

input[type="text"],
select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1218;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.check input {
  width: auto;
  accent-color: var(--accent);
}

.check label {
  margin: 0;
  color: var(--text);
  cursor: pointer;
}

button[type="submit"] {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.65rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
}

button[type="submit"]:hover {
  background: var(--accent-hover);
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.35rem;
}

.result {
  margin-top: 1.25rem;
}

.result h2 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

pre.cmd {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: #0d1218;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  color: #a5b4fc;
  margin: 0 0 1rem;
  white-space: pre-wrap;
  word-break: break-all;
}

pre.out {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: #0d1218;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 3rem;
}

.msg-err {
  color: var(--err);
  padding: 0.75rem 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.msg-ok {
  border-left: 3px solid var(--ok);
  padding-left: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

footer p {
  margin: 0.5rem 0;
}

footer a {
  color: var(--accent);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

.section-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.section-hint {
  margin-top: 0;
  margin-bottom: 1rem;
}

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.resolver-group-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 1.25rem 0 0.5rem;
}

.resolver-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.resolver-pick {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.6rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1218;
  cursor: pointer;
  margin: 0;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.resolver-pick:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.resolver-pick:hover {
  border-color: #3d4f6a;
}

.resolver-pick input {
  margin-top: 0.2rem;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.resolver-pick-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.resolver-pick-name {
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.3;
}

.resolver-pick-ip {
  font-size: 0.75rem;
  color: var(--muted);
}

.resolver-pick-ip code {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: #a5b4fc;
}

.custom-ns-row {
  margin-top: 1.25rem;
}

.results-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0d1218;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.results-table th,
.results-table td {
  padding: 0.75rem 0.85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.results-table th {
  background: rgba(0, 0, 0, 0.25);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.results-table tr:last-child td {
  border-bottom: none;
}

.results-table tr.row-err {
  background: rgba(239, 68, 68, 0.06);
}

.cell-title {
  min-width: 9rem;
}

.cell-title .cell-meta {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.2rem;
  font-weight: 400;
}

.cell-host {
  white-space: nowrap;
}

.cell-host code {
  font-family: var(--mono);
  font-size: 0.82rem;
}

.cell-out {
  min-width: 12rem;
}

.mini-cmd {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #a5b4fc;
  margin: 0 0 0.4rem;
  padding: 0.35rem 0.5rem;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-all;
}

.mini-out {
  font-family: var(--mono);
  font-size: 0.8rem;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.inline-err {
  display: block;
  color: var(--err);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.cell-ip-only code.ip-value {
  font-size: 0.95rem;
  color: var(--text);
  background: transparent;
  padding: 0;
}

code.dns-answer {
  white-space: pre-wrap;
  word-break: break-word;
}

.query-status {
  margin: 0.75rem 0 0;
  padding: 0;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--muted);
  background: transparent;
  border: none;
  max-width: 100%;
  overflow: hidden;
}

.query-status--err {
  color: var(--err);
  background: transparent;
  border: none;
}