:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text2: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --orange: #db6d28;
  --purple: #bc8cff;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", monospace;
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── NAV ─────────────────────────────────── */
.nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-weight: 700;
  color: var(--text);
  padding: 12px 8px;
  margin-right: 8px;
  font-size: 15px;
  white-space: nowrap;
}

.nav a {
  color: var(--text2);
  padding: 12px 10px;
  font-size: 13px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav a:hover, .nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* ─── LAYOUT ──────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 16px;
}

.page-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text);
}

/* ─── CARDS ───────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── FORMS ───────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 13px;
  color: var(--text2);
  font-weight: 500;
}

input, select, textarea {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  width: 100%;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 100px;
  font-family: "Courier New", monospace;
  font-size: 12px;
}

/* ─── BUTTONS ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--bg3);
  color: var(--text);
  text-decoration: none;
}

.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0d1117;
}

.btn-primary:hover { background: #79c0ff; border-color: #79c0ff; color: #0d1117; }

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-green { border-color: var(--green); color: var(--green); }
.btn-green:hover { background: var(--green); color: #0d1117; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* ─── TABLES ──────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  background: var(--bg3);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text2);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  font-family: "Courier New", monospace;
  font-size: 12px;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.03); }

/* ─── STATUS BADGES ───────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  white-space: nowrap;
}

.badge-CONNECTED, .badge-OK, .badge-GOOD,
.badge-UNIVERSAL_GOOD { background: rgba(63,185,80,.15); color: var(--green); border: 1px solid rgba(63,185,80,.3); }

.badge-SSL_ERROR_CONNECTED { background: rgba(88,166,255,.15); color: var(--accent); border: 1px solid rgba(88,166,255,.3); }

.badge-MAYBE, .badge-OPERATOR_SPECIFIC_GOOD,
.badge-HTTP_ERROR { background: rgba(210,153,34,.15); color: var(--yellow); border: 1px solid rgba(210,153,34,.3); }

.badge-BAD, .badge-FAILED, .badge-TIMEOUT,
.badge-DNS_ERROR, .badge-NO_ROUTE,
.badge-BLOCKED_OR_RESET, .badge-TLS_ERROR { background: rgba(248,81,73,.15); color: var(--red); border: 1px solid rgba(248,81,73,.3); }

.badge-CONNECTION_REFUSED { background: rgba(219,109,40,.15); color: var(--orange); border: 1px solid rgba(219,109,40,.3); }

.badge-NO_DATA { background: rgba(139,148,158,.15); color: var(--text2); border: 1px solid var(--border); }

/* ─── WARNINGS ────────────────────────────── */
.alert {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 12px;
  font-size: 13px;
}

.alert-warning { background: rgba(210,153,34,.1); border: 1px solid rgba(210,153,34,.3); color: var(--yellow); }
.alert-success { background: rgba(63,185,80,.1); border: 1px solid rgba(63,185,80,.3); color: var(--green); }
.alert-info { background: rgba(88,166,255,.1); border: 1px solid rgba(88,166,255,.3); color: var(--accent); }

/* ─── METRICS ROW ─────────────────────────── */
.metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.metric {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  min-width: 120px;
  text-align: center;
}

.metric-val {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.metric-label {
  font-size: 11px;
  color: var(--text2);
  margin-top: 2px;
}

/* ─── FILTERS ─────────────────────────────── */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  align-items: flex-end;
}

.filters form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  width: 100%;
}

.filters select, .filters input {
  width: auto;
  min-width: 140px;
}

/* ─── CODE BLOCK ──────────────────────────── */
.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  font-family: "Courier New", monospace;
  font-size: 12px;
  overflow-x: auto;
  white-space: pre;
  color: var(--text2);
  position: relative;
}

.copy-btn-abs {
  position: absolute;
  top: 6px;
  right: 6px;
}

/* ─── OPERATOR MATRIX ─────────────────────── */
.matrix-GOOD { background: rgba(63,185,80,.2); color: var(--green); }
.matrix-MAYBE { background: rgba(210,153,34,.2); color: var(--yellow); }
.matrix-BAD { background: rgba(248,81,73,.2); color: var(--red); }
.matrix-NO_DATA { background: transparent; color: var(--text2); }

/* ─── TABS ────────────────────────────────── */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text2);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: all 0.15s;
  margin-bottom: -1px;
}

.tab-btn.active, .tab-btn:hover {
  color: var(--text);
  border-bottom-color: var(--accent);
}

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

/* ─── EXPORT LIST ─────────────────────────── */
.export-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 10px;
}

.export-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  gap: 12px;
}

.export-name { font-size: 13px; color: var(--text); }
.export-desc { font-size: 11px; color: var(--text2); margin-top: 2px; }

/* ─── RESPONSIVE ──────────────────────────── */
@media (max-width: 640px) {
  .container { padding: 12px 10px; }
  .card { padding: 14px; }
  .form-grid { grid-template-columns: 1fr; }
  .nav a { padding: 10px 6px; font-size: 12px; }
  .metric-val { font-size: 18px; }
  .page-title { font-size: 16px; }
  td, th { padding: 6px 8px; font-size: 11px; }
}