/* ---------- design tokens ---------- */
:root {
  --bg: #0a0c10;
  --bg-elev: #11141b;
  --bg-elev-2: #161a24;
  --border: #232838;
  --border-strong: #2f3548;
  --fg: #e6e8ee;
  --fg-mute: #8a94a8;
  --fg-dim: #5a6378;

  --accent: #5eead4;        /* teal */
  --accent-2: #7cc4ff;       /* cyan */
  --grad: linear-gradient(135deg, #5eead4 0%, #7cc4ff 100%);
  --grad-soft: linear-gradient(135deg, rgba(94,234,212,.12), rgba(124,196,255,.08));

  --ok: #6ddf8a;
  --warn: #f5c66b;
  --fail: #ff7a7a;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.02) inset, 0 0 0 1px rgba(255,255,255,0.02);
  --shadow-hover: 0 0 0 1px var(--border-strong), 0 10px 40px -10px rgba(94,234,212,0.10);

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 80% -10%, rgba(124,196,255,0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(94,234,212,0.06), transparent 60%),
    var(--bg);
  color: var(--fg);
  font-family: Inter, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); background: var(--bg-elev-2); padding: 1px 6px; border-radius: 4px; font-size: 12px; }

/* ---------- header ---------- */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,12,16,0.7);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--grad);
  box-shadow: 0 4px 20px -4px rgba(94,234,212,0.6);
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute; inset: 5px;
  border-radius: 4px;
  background: var(--bg);
}
.brand h1 { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.brand-sub { margin: 0; font-size: 12px; color: var(--fg-mute); }

.header-actions { display: flex; gap: 12px; align-items: center; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--fg-mute);
}
.status-pill .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--fg-dim);
  box-shadow: 0 0 0 0 transparent;
}
.status-pill.ok .dot { background: var(--ok); box-shadow: 0 0 12px var(--ok); }
.status-pill.warn .dot { background: var(--warn); }
.status-pill.fail .dot { background: var(--fail); }
.status-pill.live .dot { background: var(--accent); animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: 0.5; transform: scale(1.4); }
}

.primary-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  background: var(--grad);
  color: #0a0c10;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: 0 4px 16px -4px rgba(94,234,212,0.4);
}
.primary-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px -4px rgba(94,234,212,0.6); }
.primary-btn:active { transform: translateY(0); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.ghost-btn {
  background: transparent;
  color: var(--fg-mute);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 6px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.ghost-btn:hover { color: var(--fg); border-color: var(--border-strong); }

/* ---------- main layout ---------- */
main {
  max-width: 1200px;
  margin: 32px auto;
  padding: 0 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  padding: 32px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -1px; right: -1px;
  width: 320px; height: 320px;
  background: var(--grad-soft);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-main { position: relative; z-index: 1; }
.hero-label {
  font-size: 12px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.hero-value {
  font-family: var(--mono);
  font-size: 72px;
  font-weight: 500;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.03em;
}
.hero-unit { font-size: 24px; margin-left: 12px; color: var(--fg-mute); -webkit-text-fill-color: var(--fg-mute); }
.hero-meta {
  margin-top: 12px;
  display: flex; align-items: center; gap: 12px;
  color: var(--fg-mute);
  font-size: 13px;
}
.dot-sep {
  width: 3px; height: 3px; border-radius: 50%; background: var(--fg-dim);
}
.hero-side {
  display: flex; flex-direction: column; gap: 12px;
  min-width: 180px;
}
.hero-stat {
  padding: 12px 16px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.hero-stat-label { font-size: 11px; color: var(--fg-mute); text-transform: uppercase; letter-spacing: 0.06em; }
.hero-stat-value { font-family: var(--mono); font-size: 18px; margin-top: 4px; }

/* ---------- settings bar ---------- */
.settings-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
  padding: 14px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.settings-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.settings-group label {
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.settings-group select,
.settings-group input[type="number"] {
  background: var(--bg-elev-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 10px;
  font: inherit;
  font-family: var(--mono);
  font-size: 13px;
  min-width: 96px;
}
.settings-group select:focus,
.settings-group input:focus {
  outline: none;
  border-color: var(--accent);
}
.settings-summary {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-mute);
  padding-bottom: 8px;
}

/* ---------- progress ---------- */
.progress-card {
  padding: 16px 20px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.progress-head {
  display: flex; justify-content: space-between;
  font-size: 13px;
  margin-bottom: 8px;
}
#progress-mbps { font-family: var(--mono); color: var(--accent); font-weight: 500; }
.progress-bar {
  height: 6px;
  background: var(--bg-elev-2);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--grad);
  border-radius: 999px;
  width: 0%;
  transition: width 0.2s ease;
}

/* ---------- card ---------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-head h2 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: -0.01em; }
.card-sub { font-size: 12px; color: var(--fg-mute); font-family: var(--mono); }

/* ---------- node grid (last test) ---------- */
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  padding: 20px;
}
.node-tile {
  padding: 16px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}
.node-tile:hover { border-color: var(--border-strong); }
.node-tile-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.node-tile-name { font-weight: 500; font-size: 13px; }
.node-tile-bps { font-family: var(--mono); font-size: 22px; font-weight: 500; color: var(--accent); }
.node-tile-meta { font-size: 11px; color: var(--fg-mute); margin-top: 6px; }
.node-tile.fail .node-tile-bps { color: var(--fail); font-size: 13px; }

.empty {
  padding: 32px;
  text-align: center;
  color: var(--fg-mute);
  font-size: 13px;
}

/* ---------- data table ---------- */
.table-wrap { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-mute);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev-2);
}
.data-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: rgba(255,255,255,0.015); }
.data-table .num { font-family: var(--mono); text-align: right; }
.data-table .mono { font-family: var(--mono); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge.ok    { background: rgba(109,223,138,0.12); color: var(--ok); }
.badge.warn  { background: rgba(245,198,107,0.14); color: var(--warn); }
.badge.fail  { background: rgba(255,122,122,0.12); color: var(--fail); }
.badge.cat   { background: var(--bg-elev-2); color: var(--fg-mute); border: 1px solid var(--border); }
.badge.method { background: rgba(124,196,255,0.10); color: var(--accent-2); font-family: var(--mono); }

/* ---------- category grid (latency dashboard) ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  padding: 20px;
}
.cat-tile {
  padding: 16px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}
.cat-name { font-size: 11px; color: var(--fg-mute); text-transform: uppercase; letter-spacing: 0.06em; }
.cat-best { font-family: var(--mono); font-size: 28px; font-weight: 500; margin-top: 8px; }
.cat-best .unit { font-size: 14px; color: var(--fg-mute); margin-left: 4px; }
.cat-range { font-size: 12px; color: var(--fg-mute); font-family: var(--mono); margin-top: 4px; }
.cat-meta { font-size: 11px; color: var(--fg-mute); margin-top: 10px; display: flex; justify-content: space-between; }

/* ---------- filter chips ---------- */
.filter-bar { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-mute);
  padding: 4px 12px;
  border-radius: 999px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.chip:hover { color: var(--fg); }
.chip.active {
  background: var(--bg-elev-2);
  color: var(--accent);
  border-color: rgba(94,234,212,0.4);
}

/* ---------- footer ---------- */
footer {
  max-width: 1200px;
  margin: 24px auto 48px;
  padding: 16px 32px;
  font-size: 11px;
  color: var(--fg-dim);
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  main { padding: 0 16px; }
  .app-header { padding: 14px 16px; }
  .hero { grid-template-columns: 1fr; padding: 24px; }
  .hero-value { font-size: 56px; }
  .hero-side { flex-direction: row; flex-wrap: wrap; }
  .hero-stat { flex: 1; min-width: 100px; }
}