:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-elev-2: #1c2330;
  --border: #262d3a;
  --text: #e6edf3;
  --text-dim: #8b98a9;
  --accent: #4dd4ac;
  --accent-dim: #2b7f69;
  --warn: #e3b341;
  --danger: #f85149;
  --h0: #f0f6fc;
  --h1: #4dd4ac;
  --h2: #58a6ff;
  --h3: #bc8cff;
  --h4: #ff8fab;
  --ghost: #6e7681;
  --q-good: #3fb950;
  --q-fair: #d6b13a;
  --q-weak: #e8883a;
  --q-bad: #f4544c;
  --q-unknown: #4a5361;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 18px;
  height: 56px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand button {
  align-self: center; background: var(--bg-elev-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px; padding: 6px 10px; font-size: 12px; cursor: pointer;
}
.brand button:hover { border-color: var(--accent-dim); color: var(--accent); }
.brand h1 { font-size: 15px; font-weight: 600; margin: 0; letter-spacing: .2px; }
.brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); align-self: center;
  box-shadow: 0 0 10px var(--accent);
}
.source { font-size: 11px; color: var(--text-dim); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.netstats { display: flex; gap: 18px; margin-left: auto; }
.netstat { text-align: right; }
.netstat .v { font-size: 14px; font-weight: 600; font-variant-numeric: tabular-nums; }
.netstat .k { font-size: 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .6px; }

.controls { display: flex; align-items: center; gap: 10px; }
.controls input[type="search"] {
  background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 6px 10px; font-size: 12px; width: 220px; outline: none;
}
.controls input[type="search"]:focus { border-color: var(--accent-dim); }
.toggle { font-size: 12px; color: var(--text-dim); display: flex; align-items: center; gap: 5px; cursor: pointer; user-select: none; }
.toggle input { accent-color: var(--accent); }
.controls select {
  background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 6px 8px; font-size: 12px; cursor: pointer;
}
.controls button {
  background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 6px 10px; font-size: 12px; cursor: pointer;
}
.controls button:hover { border-color: var(--accent-dim); color: var(--accent); }

/* ---------- layout ---------- */
main { flex: 1 1 auto; display: flex; min-height: 0; }
#graph { position: relative; flex: 1 1 auto; min-width: 0; }
#canvas { width: 100%; height: 100%; display: block; cursor: grab; }
#canvas:active { cursor: grabbing; }

.hint {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
  font-size: 11px; color: var(--text-dim); background: rgba(22,27,34,.85);
  padding: 6px 12px; border-radius: 20px; border: 1px solid var(--border);
  pointer-events: none; transition: opacity .3s; max-width: 70%; text-align: center;
}
.hint.ok { color: var(--accent); border-color: var(--accent-dim); }
.hint.warn { color: var(--warn); border-color: #6b5320; }

.legend {
  position: absolute; top: 14px; left: 14px;
  background: rgba(22,27,34,.9); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; font-size: 11px; color: var(--text-dim);
  backdrop-filter: blur(6px);
}
.legend-title { font-size: 10px; text-transform: uppercase; letter-spacing: .6px; margin-bottom: 6px; color: var(--text); }
.legend-row { display: flex; align-items: center; gap: 7px; line-height: 1.7; }
.legend-sep { height: 1px; background: var(--border); margin: 7px 0; }
.legend-note { font-size: 10px; color: #5b6573; margin-top: 5px; }
.legend .legend-title + .legend-row { margin-top: 1px; }
.swatch { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.swatch.h0 { background: var(--h0); } .swatch.h1 { background: var(--h1); }
.swatch.h2 { background: var(--h2); } .swatch.h3 { background: var(--h3); }
.swatch.h4 { background: var(--h4); }
.shape { width: 10px; height: 10px; display: inline-block; background: var(--text-dim); }
.shape.circle { border-radius: 50%; }
.shape.square { border-radius: 2px; }
.shape.ghost { border-radius: 50%; background: none; border: 1px dashed var(--ghost); }

/* ---------- graph elements ---------- */
.ring { fill: none; stroke: #1e2633; stroke-width: 1px; }
.ring-label {
  fill: #47505f; font-size: 9px; text-anchor: middle;
  text-transform: uppercase; letter-spacing: .8px;
}

.link { stroke: #303948; stroke-width: 1.2px; fill: none; stroke-linecap: round; }
.lnk line.hit { stroke: transparent; stroke-width: 14px; pointer-events: stroke; }
.lnk { cursor: crosshair; }

.link.q-good { stroke: var(--q-good); stroke-opacity: .55; }
.link.q-fair { stroke: var(--q-fair); stroke-opacity: .7; }
.link.q-weak { stroke: var(--q-weak); stroke-opacity: .85; }
.link.q-bad  { stroke: var(--q-bad);  stroke-opacity: .95; }
.link.q-unknown { stroke: var(--q-unknown); stroke-opacity: .8; stroke-dasharray: 4 4; }
.link.binding { stroke: #4b3b66; stroke-dasharray: 3 3; }
.link.dim { stroke-opacity: .18; }
.link.path { stroke-opacity: 1; filter: drop-shadow(0 0 5px currentColor); }
.link.path.q-unknown { stroke: var(--accent); }

.node { cursor: pointer; }
.node .body { stroke: #0e1116; stroke-width: 1.5px; }
.node .halo { fill: none; stroke-width: 2px; stroke-opacity: 0; }
.node .halo.q-weak { stroke: var(--q-weak); stroke-opacity: .85; }
.node .halo.q-bad { stroke: var(--q-bad); stroke-opacity: .95; }
.node.ghost .body { fill: none !important; stroke: var(--ghost); stroke-dasharray: 2 2; }
.node.dim { opacity: .13; }
.node.selected .body { stroke: #fff; stroke-width: 2.5px; }
.node.onpath .body { stroke: var(--accent); stroke-width: 2px; }
.node.match .body { stroke: var(--warn); stroke-width: 3px; }
.node.match { filter: drop-shadow(0 0 7px var(--warn)); }
.node.match text { fill: var(--warn); opacity: 1; font-weight: 600; }
.node text {
  font-size: 10px; fill: var(--text-dim); text-anchor: middle;
  pointer-events: none; paint-order: stroke;
  stroke: var(--bg); stroke-width: 3px; stroke-linejoin: round;
}
.node text.minor { font-size: 9px; opacity: .75; }
.node.selected text, .node.onpath text { fill: var(--text); opacity: 1; }
.node.selected text { font-weight: 600; }

.tooltip {
  position: absolute; pointer-events: none; z-index: 10;
  background: rgba(28,35,48,.97); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 10px; font-size: 11px; max-width: 260px;
  box-shadow: 0 6px 20px rgba(0,0,0,.45); opacity: 0; transition: opacity .12s;
}
.tooltip .t-name { font-weight: 600; color: var(--text); margin-bottom: 2px; }
.tooltip .t-meta { color: var(--text-dim); }

/* ---------- side panel ---------- */
.panel {
  flex: 0 0 360px; background: var(--bg-elev); border-left: 1px solid var(--border);
  overflow-y: auto; padding: 18px;
}
.panel-empty { color: var(--text-dim); }
.panel-empty h2 { font-size: 14px; color: var(--text); margin: 0 0 8px; }
.panel-empty p { font-size: 12px; line-height: 1.6; margin: 0; }

.p-head h2 { font-size: 16px; margin: 0 0 4px; line-height: 1.3; }
.p-head .sub { font-size: 12px; color: var(--text-dim); }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 18px; }
.badge {
  font-size: 10px; text-transform: uppercase; letter-spacing: .5px;
  padding: 3px 8px; border-radius: 20px; border: 1px solid var(--border); color: var(--text-dim);
}
.badge.type { color: var(--accent); border-color: var(--accent-dim); }
.badge.warn { color: var(--warn); border-color: #6b5320; }
.badge.danger { color: var(--danger); border-color: #6b2b28; }

.section { margin-bottom: 20px; }
.section h3 {
  font-size: 10px; text-transform: uppercase; letter-spacing: .8px;
  color: var(--text-dim); margin: 0 0 8px; font-weight: 600;
}
.kv { display: grid; grid-template-columns: 116px 1fr; gap: 4px 10px; font-size: 12px; }
.kv dt { color: var(--text-dim); }
.kv dd { margin: 0; word-break: break-word; font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }

.route { list-style: none; margin: 0; padding: 0; }
.route li { display: flex; align-items: center; gap: 8px; padding: 5px 0; font-size: 12px; }
.route li + li { border-top: 1px solid var(--border); }
.route .step {
  width: 20px; height: 20px; border-radius: 50%; flex: 0 0 auto;
  display: grid; place-items: center; font-size: 10px; font-weight: 600; color: #0e1116;
}
.route .rname { flex: 1 1 auto; cursor: pointer; }
.route .rname:hover { color: var(--accent); }
.route .raddr { color: var(--text-dim); font-family: ui-monospace, Menlo, monospace; font-size: 10px; }

.bar { height: 5px; border-radius: 3px; background: var(--bg-elev-2); overflow: hidden; margin-top: 4px; }
.bar > span { display: block; height: 100%; background: var(--accent); }
.bar.warn > span { background: var(--warn); }
.bar.danger > span { background: var(--danger); }

.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chip {
  font-size: 10px; padding: 2px 6px; border-radius: 4px;
  background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text-dim);
  font-family: ui-monospace, Menlo, monospace;
}
.ep { border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; margin-bottom: 8px; }
.ep h4 { margin: 0 0 6px; font-size: 11px; color: var(--text); }
.ep .ep-label { font-size: 10px; color: var(--text-dim); margin: 6px 0 3px; }

/* ---------- link quality ---------- */
.q-dot {
  width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: 0 0 auto;
}
.q-dot.q-good { background: var(--q-good); }
.q-dot.q-fair { background: var(--q-fair); }
.q-dot.q-weak { background: var(--q-weak); }
.q-dot.q-bad { background: var(--q-bad); }
.q-dot.q-unknown { background: var(--q-unknown); }

.q-text-good { color: var(--q-good); }
.q-text-fair { color: var(--q-fair); }
.q-text-weak { color: var(--q-weak); }
.q-text-bad { color: var(--q-bad); }
.q-text-unknown { color: var(--text-dim); }

.bar.q-bar-good > span { background: var(--q-good); }
.bar.q-bar-fair > span { background: var(--q-fair); }
.bar.q-bar-weak > span { background: var(--q-weak); }
.bar.q-bar-bad > span { background: var(--q-bad); }
.bar.q-bar-unknown > span { background: var(--q-unknown); }

.qhead { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.qhead .qpct { margin-left: auto; font-variant-numeric: tabular-nums; color: var(--text-dim); font-weight: 500; }

.weaklinks { list-style: none; margin: 0; padding: 0; font-size: 12px; }
.weaklinks li {
  display: flex; align-items: center; gap: 8px; padding: 6px 0; cursor: pointer;
}
.weaklinks li + li { border-top: 1px solid var(--border); }
.weaklinks li:hover .wl-name { color: var(--accent); }
.wl-name { flex: 1 1 auto; min-width: 0; }
.wl-via { color: var(--text-dim); font-size: 10px; display: block; }
.wl-rate { flex: 0 0 auto; font-variant-numeric: tabular-nums; font-weight: 600; }

.note { font-size: 11px; line-height: 1.6; color: var(--text-dim); margin: 0; }
.linkish { cursor: pointer; }
.linkish:hover { color: var(--accent); }
.stat-warn { color: var(--q-weak); }

.route li .wl-rate { font-size: 11px; }

/* ---------- dump loader ---------- */
.loader {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center; padding: 24px;
  background: rgba(8,10,14,.82); backdrop-filter: blur(4px);
}
.loader[hidden] { display: none; }
.loader-card {
  position: relative; width: min(560px, 100%); max-height: 100%; overflow-y: auto;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 12px;
  padding: 26px 26px 22px; box-shadow: 0 20px 60px rgba(0,0,0,.6);
}
.loader-card h2 { font-size: 16px; margin: 0 0 6px; }
.loader-sub { font-size: 12px; line-height: 1.6; color: var(--text-dim); margin: 0 0 18px; }
.loader-close {
  position: absolute; top: 12px; right: 12px; width: 26px; height: 26px; line-height: 1;
  background: none; border: 1px solid var(--border); border-radius: 6px;
  color: var(--text-dim); font-size: 16px; cursor: pointer;
}
.loader-close:hover { color: var(--text); border-color: var(--accent-dim); }

.dropzone {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  border: 1.5px dashed var(--border); border-radius: 10px;
  padding: 26px 18px; text-align: center; background: var(--bg);
  transition: border-color .15s, background .15s;
}
.dropzone strong { font-size: 13px; font-weight: 600; }
.dropzone span { font-size: 11px; color: var(--text-dim); }
.dropzone code { font-family: ui-monospace, Menlo, monospace; }
.dropzone button {
  margin-top: 8px; background: var(--bg-elev-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px; padding: 6px 12px; font-size: 12px; cursor: pointer;
}
.dropzone button:hover { border-color: var(--accent-dim); color: var(--accent); }
.dropzone.over { border-color: var(--accent); background: rgba(77,212,172,.07); }
.dropzone.over strong { color: var(--accent); }

.loader-or {
  display: flex; align-items: center; gap: 10px; margin: 16px 0 10px;
  font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .6px;
}
.loader-or::before, .loader-or::after { content: ""; flex: 1 1 auto; height: 1px; background: var(--border); }

.loader-card textarea {
  width: 100%; height: 118px; resize: vertical;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 10px; outline: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; line-height: 1.5;
}
.loader-card textarea:focus { border-color: var(--accent-dim); }
.loader-card textarea::placeholder { color: #4a5361; }

.loader-actions { display: flex; align-items: center; gap: 12px; margin-top: 14px; }
.loader-actions .toggle { margin-right: auto; }
.primary-btn {
  background: var(--accent); border: 1px solid var(--accent); color: #0e1116;
  border-radius: 6px; padding: 7px 16px; font-size: 12px; font-weight: 600; cursor: pointer;
}
.primary-btn:hover { background: #63e0bb; }
.ghost-btn {
  background: none; border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 6px; padding: 6px 10px; font-size: 12px; cursor: pointer;
}
.ghost-btn:hover { color: var(--danger); border-color: #6b2b28; }

.loader-msg { font-size: 12px; line-height: 1.5; margin: 14px 0 0; }
.loader-msg.bad { color: var(--danger); }
.loader-msg.warn { color: var(--warn); }
.loader-msg.ok { color: var(--accent); }