:root {
  --bg: #0f1317;
  --panel: #1a2028;
  --line: #2f3743;
  --text: #eef3fb;
  --muted: #9eabbf;
  --accent: #6de1c2;
  --accent-2: #5ab2ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 15% -10%, #263245, var(--bg) 40%);
}

.wrap {
  width: min(100% - 2rem, 960px);
  margin: 0 auto;
  padding: 3rem 0;
}

.hero {
  margin-bottom: 1.25rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
}

h2,
h3 {
  margin: 0;
}

.sub {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.card + .card {
  margin-top: 1rem;
}

#ip-output {
  margin: 0.35rem 0 0;
  color: var(--accent);
  font-size: clamp(1.25rem, 4vw, 1.9rem);
  font-weight: 700;
}

.tab-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.tab-btn {
  border: 1px solid var(--line);
  background: #11161e;
  color: var(--text);
  border-radius: 0.5rem;
  padding: 0.55rem 0.6rem;
  cursor: pointer;
  font: inherit;
}

.tab-btn.active {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.tab-panel {
  display: none;
  margin-top: 1rem;
}

.tab-panel.active {
  display: block;
}

.panel-note {
  margin: 0.4rem 0 0.75rem;
  color: var(--muted);
}

.diag-table {
  width: 100%;
  border-collapse: collapse;
}

.diag-table tr {
  border-bottom: 1px solid var(--line);
}

.diag-table td {
  vertical-align: top;
  padding: 0.55rem 0.35rem;
}

.diag-table td:first-child {
  width: 30%;
  color: var(--muted);
}

.copy-btn {
  border: 1px solid var(--accent);
  color: var(--accent);
  background: transparent;
  border-radius: 0.45rem;
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}

#debug-json {
  margin-top: 0.7rem;
  background: #0d1118;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.75rem;
  overflow: auto;
  max-height: 420px;
  color: #c7d3e5;
}

@media (max-width: 760px) {
  .tab-list {
    grid-template-columns: 1fr 1fr;
  }

  .diag-table td:first-child {
    width: 42%;
  }
}

.geo-title {
  margin: 1rem 0 0.35rem;
}