:root {
  --bg0: #0f1419;
  --bg1: #1a2332;
  --text: #e8eef5;
  --muted: #8b9bb0;
  --ok: #2f9e6b;
  --warn: #c9952a;
  --bad: #c44b4b;
  --unknown: #5a6a7c;
  --accent: #4d8fbf;
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #243247 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1c2a22 0%, transparent 50%),
    var(--bg0);
}

.page {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.brand {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0.35rem 0 0.5rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  color: var(--muted);
  max-width: 36rem;
  line-height: 1.45;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin: 1.75rem 0 1rem;
}

button#run {
  appearance: none;
  border: 0;
  border-radius: 0.4rem;
  padding: 0.7rem 1.25rem;
  font: inherit;
  font-weight: 600;
  color: #0b1218;
  background: var(--accent);
  cursor: pointer;
}

button#run:disabled {
  opacity: 0.55;
  cursor: wait;
}

.btn-cancel {
  appearance: none;
  border: 1px solid #8a4a4a;
  border-radius: 0.4rem;
  padding: 0.65rem 1.1rem;
  font: inherit;
  font-weight: 600;
  color: #f0d0d0;
  background: color-mix(in srgb, var(--bad) 35%, var(--bg1));
  cursor: pointer;
}

.spinner {
  width: 1.15rem;
  height: 1.15rem;
  border: 2px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

body.is-running .layers {
  opacity: 0.98;
}

.status {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.summary {
  margin: 0 0 1.5rem;
  padding: 1rem 1.1rem;
  background: color-mix(in srgb, var(--bg1) 88%, white 4%);
  border-left: 3px solid var(--accent);
  line-height: 1.45;
}

.layers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 900px) {
  .layers {
    grid-template-columns: 0.85fr 0.85fr 1.15fr 1.5fr;
    gap: 0.75rem;
  }
}

@media (min-width: 720px) and (max-width: 899px) {
  .layers {
    grid-template-columns: 1fr 1fr;
  }
}

.layer {
  margin: 0;
  padding: 0.9rem 0.85rem;
  background: var(--bg1);
  border-top: 4px solid var(--unknown);
  min-height: 8.5rem;
}

.layer[data-status="ok"] {
  border-top-color: var(--ok);
}
.layer[data-status="warn"] {
  border-top-color: var(--warn);
}
.layer[data-status="bad"] {
  border-top-color: var(--bad);
}
.layer[data-status="unknown"] {
  border-top-color: var(--unknown);
}
.layer[data-status="standby"],
.layer[data-status="planned"] {
  border-top-color: var(--unknown);
}

.uplinks {
  list-style: none;
  margin: 0.65rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.uplink {
  padding: 0.45rem 0.5rem;
  border-left: 3px solid var(--unknown);
  background: color-mix(in srgb, var(--bg0) 55%, transparent);
}

/* Primary: gray until measured; green only when OK */
.uplink-primary[data-status="unknown"] {
  opacity: 1;
  background: color-mix(in srgb, var(--bg0) 55%, transparent);
  border-left-color: var(--unknown);
  box-shadow: none;
}

.uplink-primary[data-status="ok"] {
  opacity: 1;
  background: color-mix(in srgb, var(--ok) 28%, var(--bg1));
  border-left-color: var(--ok);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ok) 45%, transparent);
}

.uplink-primary[data-status="warn"] {
  background: color-mix(in srgb, var(--warn) 28%, var(--bg1));
  border-left-color: var(--warn);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--warn) 45%, transparent);
}

.uplink-primary[data-status="bad"] {
  background: color-mix(in srgb, var(--bad) 28%, var(--bg1));
  border-left-color: var(--bad);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--bad) 45%, transparent);
}

.uplink-primary[data-status="ok"] .uplink-role {
  color: color-mix(in srgb, var(--ok) 70%, white);
  font-weight: 700;
}

/* Standby backup: gray until measured; yellow when standby/ok after test */
.uplink-standby[data-status="unknown"] {
  opacity: 1;
  background: color-mix(in srgb, var(--bg0) 55%, transparent);
  border-left-color: var(--unknown);
}

.uplink-standby[data-status="standby"],
.uplink-standby[data-status="ok"],
.uplink-standby[data-status="warn"] {
  opacity: 1;
  background: color-mix(in srgb, var(--warn) 14%, var(--bg1));
  border-left-color: var(--warn);
}

.uplink-standby[data-status="bad"] {
  background: color-mix(in srgb, var(--bad) 18%, var(--bg1));
  border-left-color: var(--bad);
}

.uplink-standby[data-status="standby"] .uplink-role,
.uplink-standby[data-status="ok"] .uplink-role,
.uplink-standby[data-status="warn"] .uplink-role {
  color: color-mix(in srgb, var(--warn) 75%, white);
  font-weight: 650;
}

.uplink-standby[data-status="unknown"] .uplink-role {
  color: var(--muted);
  font-weight: 400;
}

/* Planned: muted gray */
.uplink-planned {
  opacity: 0.65;
  background: color-mix(in srgb, var(--bg0) 60%, transparent);
  border-left-color: #6b7c90;
}

.uplink-planned .uplink-role {
  color: var(--muted);
}

.uplink[data-status="ok"] {
  border-left-color: var(--ok);
}
.uplink[data-status="warn"] {
  border-left-color: var(--warn);
}
.uplink[data-status="bad"] {
  border-left-color: var(--bad);
}
.uplink[data-status="standby"] {
  border-left-color: var(--warn);
}
.uplink[data-status="planned"] {
  border-left-color: #6b7c90;
}
.uplink[data-status="unknown"] {
  border-left-color: var(--unknown);
}

.uplink-head {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.78rem;
}

.uplink-label {
  font-weight: 650;
  letter-spacing: 0.04em;
}

.uplink-role {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.uplink-metrics {
  margin-top: 0.2rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.targets {
  margin: 0.55rem 0 0;
  display: grid;
  gap: 0.65rem;
}

.target-group-title {
  margin: 0 0 0.3rem;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}

.target-group[data-audience="gamer"] .target-group-title {
  color: #7eb6e8;
}

.target-group[data-audience="family"] .target-group-title {
  color: #c4a574;
}

.target-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.target {
  margin: 0;
  padding: 0.4rem 0.45rem;
  border-left: 3px solid var(--unknown);
  background: color-mix(in srgb, var(--bg0) 50%, transparent);
}

.target[data-status="ok"] {
  border-left-color: var(--ok);
}
.target[data-status="warn"] {
  border-left-color: var(--warn);
}
.target[data-status="bad"] {
  border-left-color: var(--bad);
}

.target .has-tip {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  width: 100%;
}

.target-label {
  font-weight: 650;
  font-size: 0.82rem;
  min-width: 0;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.target-metrics {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  flex-shrink: 0;
}

/* Custom hover tips — native title + cursor:help was unreliable */
.has-tip {
  position: relative;
  display: block;
}

.has-tip[data-tip]:hover::after,
.has-tip[data-tip]:focus-visible::after {
  content: attr(data-tip);
  position: absolute;
  left: 0;
  bottom: calc(100% + 6px);
  z-index: 20;
  min-width: 12rem;
  max-width: 18rem;
  padding: 0.45rem 0.55rem;
  border-radius: 0.3rem;
  background: #0a0e13;
  color: #e8eef5;
  border: 1px solid #3a4a5c;
  font-size: 0.72rem;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: normal;
  text-transform: none;
  white-space: normal;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.uplink .has-tip[data-tip]:hover::after {
  left: 0;
  right: auto;
}

.layer-id {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--muted);
}

.layer-metrics {
  margin: 0.55rem 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.35;
}

.layer-why {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.35;
}

.advanced {
  margin-top: 2rem;
  color: var(--muted);
}

.advanced pre {
  overflow: auto;
  padding: 0.85rem;
  background: #0a0e13;
  color: #c5d0dc;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.4;
}

.raw-title {
  margin: 1.25rem 0 0.4rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
}

.raw-note {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.path-section {
  margin-top: 2rem;
  padding: 1rem 1.1rem 1.15rem;
  background: color-mix(in srgb, var(--bg1) 92%, white 3%);
  border-top: 3px solid color-mix(in srgb, var(--accent) 55%, var(--unknown));
}

.path-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.25rem;
  margin-bottom: 0.85rem;
}

.path-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.path-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.path-empty {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.path-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.path-table th {
  text-align: left;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 650;
  padding: 0.35rem 0.5rem 0.55rem;
  border-bottom: 1px solid #2a3544;
}

.path-table td {
  padding: 0.45rem 0.5rem;
  vertical-align: middle;
  border-bottom: 1px solid color-mix(in srgb, #2a3544 70%, transparent);
}

.path-table tr[data-kind="jump"] {
  background: color-mix(in srgb, var(--warn) 12%, transparent);
}

.path-table tr[data-kind="timeout"] {
  background: color-mix(in srgb, var(--bad) 10%, transparent);
}

.path-hop {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  width: 2.5rem;
}

.path-host {
  font-weight: 600;
  min-width: 8rem;
}

.path-host small {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  margin-top: 0.1rem;
}

.path-rtt {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  width: 5.5rem;
}

.path-delta {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
  width: 5rem;
}

.path-delta[data-kind="jump"] {
  color: var(--warn);
  font-weight: 650;
}

.path-delta[data-kind="timeout"] {
  color: var(--bad);
  font-weight: 650;
}

.path-bar-cell {
  width: 40%;
  min-width: 7rem;
}

.path-bar {
  height: 0.55rem;
  border-radius: 0.15rem;
  background: color-mix(in srgb, var(--unknown) 35%, transparent);
  overflow: hidden;
}

.path-bar > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--accent) 75%, var(--ok)),
    var(--accent)
  );
  min-width: 2px;
}

.path-bar[data-kind="jump"] > span {
  background: linear-gradient(90deg, var(--warn), #e0b040);
}

.path-bar[data-kind="timeout"] {
  background: color-mix(in srgb, var(--bad) 25%, transparent);
}

.path-bar[data-kind="timeout"] > span {
  width: 100% !important;
  background: repeating-linear-gradient(
    -45deg,
    color-mix(in srgb, var(--bad) 55%, transparent),
    color-mix(in srgb, var(--bad) 55%, transparent) 4px,
    transparent 4px,
    transparent 8px
  );
}

.path-callout {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.4;
}

.path-callout.path-note {
  font-size: 0.82rem;
  opacity: 0.92;
}

.path-callout strong {
  color: var(--text);
  font-weight: 650;
}