:root {
  --bg: #0d1117;
  --card: #161b22;
  --card-2: #1c2330;
  --border: #2d333b;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --accent-2: #1f6feb;
  --danger: #da3633;
  --ok: #3fb950;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -200px, #16233a 0%, var(--bg) 60%);
  color: var(--fg);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", Roboto, sans-serif;
  min-height: 100vh;
}

header {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 8px;
  text-align: center;
}

header h1 {
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: -0.5px;
}

.tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 2px 10px;
  vertical-align: middle;
  margin-left: 8px;
}

.sub { color: var(--muted); font-size: 13.5px; margin: 0; }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 20px 80px;
  display: grid;
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.card h2 {
  margin: 0 0 4px;
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 16px;
}

label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
label.full { grid-column: 1 / -1; }

input, select, textarea {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
  outline: none;
  transition: border-color .15s;
}

input:focus, select:focus, textarea:focus { border-color: var(--accent); }

textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }

.switches {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 4px 0;
}

.chk { flex-direction: row; align-items: center; gap: 7px; color: var(--fg); font-size: 13.5px; cursor: pointer; }
.chk input { width: auto; accent-color: var(--accent); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

button {
  background: var(--card-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 14px;
  cursor: pointer;
  transition: all .15s;
}

button:hover { border-color: var(--muted); }

button.primary { background: var(--accent-2); border-color: var(--accent); }
button.primary:hover { background: var(--accent); }
button.ghost { background: transparent; }
button.danger { color: #ff7b72; border-color: var(--danger); }
button.danger:hover { background: var(--danger); color: #fff; }

.row { display: flex; gap: 12px; margin: 14px 0; }

.result {
  display: block;
  margin-top: 16px;
  word-break: break-all;
  background: var(--bg);
  border: 1px dashed var(--accent);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: ui-monospace, monospace;
  font-size: 12.5px;
  color: var(--accent);
}

.preview {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  max-height: 340px;
  overflow: auto;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-all;
}

.msg { display: block; margin-top: 12px; font-size: 13px; min-height: 20px; }
.msg.ok { color: var(--ok); }
.msg.err { color: #ff7b72; }

code { background: var(--card-2); padding: 1px 6px; border-radius: 5px; font-size: 12.5px; }

h3 { font-size: 14px; margin: 0 0 10px; color: var(--fg); }
h3 small { color: var(--muted); font-weight: 400; }

/* ---- top navigation ---- */
.topnav {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 14px 0 4px;
}
.navlink {
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: all .15s;
}
.navlink:hover { color: var(--fg); border-color: var(--border); }
.navlink.active { color: var(--accent); border-color: var(--accent); background: rgba(47,129,247,.08); }

/* ---- tabs ---- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tab {
  background: var(--card-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 13.5px;
  cursor: pointer;
  transition: all .15s;
}
.tab:hover { border-color: var(--muted); }
.tab.active { background: var(--accent-2); border-color: var(--accent); }

/* ---- chips / provider list ---- */
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 4px 10px;
  font-size: 12.5px;
}
.provlist { display: flex; flex-wrap: wrap; gap: 6px; }
.provrow { display: inline-flex; align-items: center; gap: 6px; }
.provrow code { font-size: 12px; }
.provbeh {
  font-size: 10.5px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0 5px;
  text-transform: uppercase;
}

/* ---- rule list ---- */
.rulelist { margin: 0; padding: 0; list-style: none; }
.rule {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
}
.rule:last-child { border-bottom: none; }
.rule code { background: transparent; padding: 0; word-break: break-all; }
.rule-act {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 11.5px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 8px;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- node table ---- */
.tablewrap { overflow-x: auto; margin-top: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 12px; position: sticky; top: 0; background: var(--card); }
td.num { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
td.name { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
td.mono { font-family: ui-monospace, monospace; font-size: 12px; }
tbody tr:hover { background: rgba(255,255,255,.02); }

.badge {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 8px;
  font-size: 11.5px;
  text-transform: uppercase;
}
button.mini { padding: 3px 10px; font-size: 11.5px; }

.errors {
  background: rgba(218,54,51,.08);
  border: 1px solid rgba(218,54,51,.4);
  border-radius: 8px;
  padding: 12px 14px;
  margin-top: 14px;
  font-size: 12.5px;
}
.errors ul { margin: 8px 0 0; padding-left: 20px; }
.errors code { font-size: 11.5px; }

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .row { flex-direction: column; }
  .rule { flex-direction: column; align-items: flex-start; gap: 4px; }
}