:root {
  --bg: #f6f7f9;
  --bg-elev: #ffffff;
  --bg-sunken: #eef0f3;
  --border: #e2e5ea;
  --border-strong: #cfd4dc;
  --text: #1c2128;
  --text-dim: #656d78;
  --text-faint: #98a0ab;
  --accent: #3b6cff;
  --accent-weak: #e8eeff;
  --match: #1a8a4a;
  --match-bg: #e5f5ea;
  --nomatch: #8a919b;
  --nomatch-bg: #eceef1;
  --unknown: #a66a00;
  --unknown-bg: #fbefd8;
  --reject: #c8321f;
  --reject-bg: #fce7e3;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(20,25,35,.06), 0 4px 16px rgba(20,25,35,.05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --bg-elev: #161b22;
    --bg-sunken: #0b0e13;
    --border: #262c36;
    --border-strong: #333b47;
    --text: #e6edf3;
    --text-dim: #9aa4b2;
    --text-faint: #6b7683;
    --accent: #5b86ff;
    --accent-weak: #1a2540;
    --match: #4ac57e;
    --match-bg: #12291d;
    --nomatch: #7d8794;
    --nomatch-bg: #1a1f27;
    --unknown: #e0a445;
    --unknown-bg: #2a2113;
    --reject: #f0715c;
    --reject-bg: #2c1512;
    --shadow: 0 1px 3px rgba(0,0,0,.3), 0 6px 20px rgba(0,0,0,.25);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  font-size: 26px; color: var(--accent);
  width: 40px; height: 40px; display: grid; place-items: center;
  background: var(--accent-weak); border-radius: 10px;
}
.title { font-weight: 700; font-size: 17px; letter-spacing: -.2px; }
.subtitle { color: var(--text-dim); font-size: 12px; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - 65px); }
.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 14px 12px; overflow-y: auto;
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600; font-size: 12px; text-transform: uppercase;
  letter-spacing: .5px; color: var(--text-dim); margin-bottom: 10px; padding: 0 4px;
}
.profile-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.profile-item {
  padding: 9px 10px; border-radius: 8px; cursor: pointer;
  display: flex; flex-direction: column; gap: 2px; border: 1px solid transparent;
}
.profile-item:hover { background: var(--bg-sunken); }
.profile-item.active { background: var(--accent-weak); border-color: var(--accent); }
.profile-item .name { font-weight: 600; }
.profile-item .meta { font-size: 11px; color: var(--text-faint); }
.empty-hint { color: var(--text-faint); font-size: 12px; padding: 8px 4px; }

.content { padding: 22px 26px; overflow-y: auto; max-width: 1100px; width: 100%; }

/* ---------- forms ---------- */
.card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 18px;
}
.card-head {
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.card-head h2 { margin: 0; font-size: 14px; font-weight: 650; }
.card-body { padding: 16px; }
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }
label.lbl { display: block; font-weight: 600; margin-bottom: 6px; font-size: 12.5px; }
label.lbl .hint { font-weight: 400; color: var(--text-faint); margin-left: 6px; font-size: 11.5px; }
input[type=text], input[type=url], textarea, select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border-strong);
  border-radius: 8px; background: var(--bg); color: var(--text);
  font-family: inherit; font-size: 13.5px; outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-weak); }
textarea { resize: vertical; font-family: var(--mono); font-size: 12.5px; line-height: 1.55; }
textarea.code { min-height: 180px; white-space: pre; }
textarea.inputs { min-height: 90px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.row > .field { flex: 1; margin-bottom: 0; min-width: 160px; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.check input { width: auto; }

/* ---------- buttons ---------- */
.btn {
  border: 1px solid var(--border-strong); background: var(--bg-elev); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 600;
  font-family: inherit; transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--bg-sunken); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--bg-sunken); }
.btn.danger { color: var(--reject); border-color: transparent; background: transparent; }
.btn.danger:hover { background: var(--reject-bg); }
.btn.small { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .spacer { flex: 1; }

/* ---------- badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px;
  border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: .2px;
  white-space: nowrap;
}
.badge.kind-domain { background: var(--accent-weak); color: var(--accent); }
.badge.kind-ip { background: var(--bg-sunken); color: var(--text-dim); }
.badge.kind-invalid { background: var(--reject-bg); color: var(--reject); }
.badge.match { background: var(--match-bg); color: var(--match); }
.badge.no_match { background: var(--nomatch-bg); color: var(--nomatch); }
.badge.unknown { background: var(--unknown-bg); color: var(--unknown); }
.badge.reject { background: var(--reject-bg); color: var(--reject); }
.badge.final { background: var(--bg-sunken); color: var(--text-dim); }

/* ---------- results ---------- */
.result-card { margin-bottom: 16px; }
.result-head {
  display: flex; align-items: center; gap: 12px; padding: 13px 16px; cursor: pointer;
  border-bottom: 1px solid transparent;
}
.result-card.open .result-head { border-bottom-color: var(--border); }
.result-head .input-name { font-family: var(--mono); font-weight: 700; font-size: 14px; }
.result-head .caret { color: var(--text-faint); transition: transform .15s; margin-left: auto; }
.result-card.open .result-head .caret { transform: rotate(90deg); }
.outcome-chips { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 8px;
  font-size: 12px; background: var(--bg-sunken); border: 1px solid var(--border);
}
.chip .k { color: var(--text-faint); font-weight: 600; }
.chip .v { font-family: var(--mono); font-weight: 700; }
.chip.route .v { color: var(--accent); }
.chip.dns .v { color: var(--text); }
.chip.reject { background: var(--reject-bg); border-color: transparent; }
.chip.reject .v { color: var(--reject); }

.result-body { padding: 4px 16px 16px; display: none; }
.result-card.open .result-body { display: block; }

.section-title {
  font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--text-dim);
  font-weight: 700; margin: 18px 0 8px;
}
.assume-warn {
  background: var(--unknown-bg); color: var(--unknown); border: 1px solid transparent;
  padding: 8px 12px; border-radius: 8px; font-size: 12.5px; margin: 6px 0 12px;
  display: flex; gap: 8px; align-items: flex-start;
}
.ip-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.ip-chip { font-family: var(--mono); font-size: 12px; background: var(--bg-sunken); border: 1px solid var(--border); padding: 3px 8px; border-radius: 6px; }

/* trace steps */
.steps { display: flex; flex-direction: column; gap: 6px; }
.step {
  border: 1px solid var(--border); border-radius: 9px; overflow: hidden; background: var(--bg);
}
.step.s-match { border-color: var(--match); }
.step.s-unknown { border-left: 3px solid var(--unknown); }
.step.s-selected { box-shadow: 0 0 0 2px var(--match) inset; }
.step-head {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px; cursor: pointer;
}
.step-head:hover { background: var(--bg-sunken); }
.step .idx {
  font-family: var(--mono); font-size: 11px; color: var(--text-faint);
  min-width: 26px; text-align: center; background: var(--bg-sunken); border-radius: 5px; padding: 1px 4px;
}
.step .summary { font-family: var(--mono); font-size: 12.5px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.step .action-text { font-size: 11.5px; color: var(--text-dim); white-space: nowrap; }
.step .effect { font-size: 11.5px; color: var(--unknown); padding: 0 12px 8px 48px; }
.step-detail { padding: 4px 12px 10px 12px; border-top: 1px dashed var(--border); display: none; }
.step.expanded .step-detail { display: block; }
.step.dimmed { opacity: .62; }

.cond {
  display: grid; grid-template-columns: 130px auto 1fr; gap: 8px; align-items: baseline;
  padding: 4px 0; font-size: 12.5px; border-bottom: 1px solid var(--border);
}
.cond:last-child { border-bottom: none; }
.cond .cf { font-weight: 600; font-family: var(--mono); font-size: 12px; }
.cond .cv { font-family: var(--mono); color: var(--text-dim); word-break: break-word; }
.cond .cnote { color: var(--text-faint); font-size: 11.5px; grid-column: 1 / -1; margin-left: 130px; }
.cond .group-tag { font-size: 10px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .3px; }
.cond .matched-val { color: var(--match); font-family: var(--mono); font-size: 11.5px; }

.ruleset-box { margin: 6px 0 6px 12px; padding: 8px 10px; background: var(--bg-sunken); border-radius: 8px; border: 1px solid var(--border); }
.ruleset-box .rs-head { display: flex; gap: 8px; align-items: center; font-size: 12px; }
.ruleset-box .rs-meta { color: var(--text-faint); font-size: 11px; }
.ruleset-box .rs-err { color: var(--reject); font-size: 11.5px; margin-top: 4px; }

.decision {
  margin-top: 10px; padding: 12px 14px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--bg-sunken); display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.decision.route { border-color: var(--accent); background: var(--accent-weak); }
.decision.reject { border-color: var(--reject); background: var(--reject-bg); }
.decision .d-label { font-size: 12px; color: var(--text-dim); font-weight: 700; text-transform: uppercase; letter-spacing: .5px; }
.decision .d-value { font-family: var(--mono); font-weight: 700; font-size: 15px; }
.decision.route .d-value { color: var(--accent); }
.decision.reject .d-value { color: var(--reject); }
.decision .d-sub { font-size: 12px; color: var(--text-dim); }
.arrow { color: var(--text-faint); }

/* ---------- modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10,14,20,.5); display: grid; place-items: center; z-index: 50;
}
.modal {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 14px;
  width: min(560px, 92vw); box-shadow: var(--shadow); max-height: 88vh; overflow: auto;
}
.modal .card-head { position: sticky; top: 0; background: var(--bg-elev); }

/* ---------- toast ---------- */
.toast-root { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 60; }
.toast {
  background: var(--bg-elev); border: 1px solid var(--border-strong); border-left: 3px solid var(--accent);
  padding: 10px 14px; border-radius: 8px; box-shadow: var(--shadow); font-size: 13px; max-width: 340px;
  animation: slidein .2s ease;
}
.toast.err { border-left-color: var(--reject); }
.toast.ok { border-left-color: var(--match); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } }

.muted { color: var(--text-dim); }
.mono { font-family: var(--mono); }
.spinner { display: inline-block; width: 15px; height: 15px; border: 2px solid var(--border-strong); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.placeholder { text-align: center; color: var(--text-faint); padding: 60px 20px; }
.placeholder .big { font-size: 40px; opacity: .5; margin-bottom: 10px; }
.file-list { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.file-row { display: flex; align-items: center; gap: 8px; font-size: 12.5px; background: var(--bg-sunken); padding: 6px 10px; border-radius: 7px; }
.file-row .fname { font-family: var(--mono); font-weight: 600; }
.file-row .fmeta { color: var(--text-faint); font-size: 11px; }