:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2330;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2d9cdb;
  --accent2: #7c3aed;
  --green: #3fb950;
  --red: #f85149;
  --yellow: #d29922;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: linear-gradient(90deg, #101623, #1a1f2e);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; gap: 12px; align-items: center; }
.logo { font-size: 28px; }
.brand h1 { font-size: 18px; font-weight: 700; }
.brand p { font-size: 12px; color: var(--muted); }

.status { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); }
.dot.ok { background: var(--green); box-shadow: 0 0 8px var(--green); }
.dot.bad { background: var(--red); }

.tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: .15s;
}
.tab:hover { color: var(--text); border-color: var(--accent); }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.container { flex: 1; padding: 20px 24px; max-width: 1080px; width: 100%; margin: 0 auto; }

.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 16px;
}
.input-card h2 { font-size: 16px; margin-bottom: 6px; }
.hint { font-size: 12.5px; color: var(--muted); margin-bottom: 14px; }

.form-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.input, .select {
  flex: 1 1 180px;
  min-width: 0;
  padding: 10px 12px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--mono);
  outline: none;
}
.input:focus, .select:focus { border-color: var(--accent); }
.input.narrow { flex: 0 0 90px; }
.select { flex: 0 0 120px; cursor: pointer; }

.btn {
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  transition: .15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.small { padding: 5px 10px; font-size: 12px; }

.quick-btns { display: flex; align-items: center; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
.quick-label { font-size: 12px; color: var(--muted); margin-right: 4px; }

.check { display: flex; align-items: center; gap: 5px; font-size: 13px; color: var(--muted); cursor: pointer; }
.check input { accent-color: var(--accent); }

.warn { font-size: 12.5px; color: var(--yellow); margin-top: 10px; }
.warn code, .hint code { background: var(--panel2); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; font-family: var(--mono); }

.result { display: none; }
.result.show { display: block; }

.res-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 14px; }
.res-head { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--panel2); }
.res-head h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
.res-title { font-size: 13px; font-family: var(--mono); color: var(--accent); }
.res-body { padding: 14px 16px; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge.available { background: rgba(63,185,80,.15); color: var(--green); border: 1px solid var(--green); }
.badge.registered { background: rgba(248,81,73,.15); color: var(--red); border: 1px solid var(--red); }
.badge.open { background: rgba(63,185,80,.15); color: var(--green); border: 1px solid var(--green); }
.badge.closed { background: rgba(153,153,153,.12); color: var(--muted); border: 1px solid var(--border); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.kv { background: var(--panel2); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.kv .k { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.kv .v { font-size: 13px; font-family: var(--mono); margin-top: 3px; word-break: break-all; white-space: pre-wrap; }

table.dns { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 13px; }
table.dns th, table.dns td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); word-break: break-all; }
table.dns th { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .4px; }
table.dns tr:last-child td { border-bottom: none; }
table.dns .type-tag { color: var(--accent2); font-weight: 600; }

pre.raw {
  background: #0a0d12;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  color: #9ecbff;
  max-height: 420px;
  overflow-y: auto;
}
pre.raw::-webkit-scrollbar { height: 8px; width: 8px; }
pre.raw::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-box { color: var(--red); background: rgba(248,81,73,.08); border: 1px solid rgba(248,81,73,.3); border-radius: 8px; padding: 12px 14px; font-size: 14px; }

.bottombar { text-align: center; padding: 14px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); }