*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0f1117;
  --surface: #1a1d27;
  --border:  #2a2d3a;
  --accent:  #7c3aed;
  --accent2: #a78bfa;
  --text:    #e2e8f0;
  --muted:   #64748b;
  --green:   #22c55e;
  --red:     #ef4444;
  --yellow:  #f59e0b;
  --mono:    'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app { max-width: 920px; margin: 0 auto; padding: 2rem 1.5rem; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

h1 { font-size: 1.6rem; font-weight: 700; color: var(--accent2); }
nav { display: flex; gap: .5rem; }

.tab-btn {
  padding: .45rem 1.1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: .9rem;
  transition: all .15s;
}
.tab-btn:hover  { color: var(--text); border-color: var(--accent); }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.tab { display: none; }
.tab.active { display: block; }

/* ── FORM ───────────────────────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}
.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: .85rem; color: var(--muted); font-weight: 500; }
.hint { font-weight: 400; font-size: .78rem; color: var(--muted); }

input[type=url],
input[type=text],
input[type=number],
select,
textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: .55rem .75rem;
  font-size: .9rem;
  outline: none;
  transition: border-color .15s;
  width: 100%;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
textarea { font-family: var(--mono); resize: vertical; }

.range-row { display: flex; align-items: center; gap: .75rem; }
.range-row input[type=range]  { flex: 1; accent-color: var(--accent); }
.range-row input[type=number] { width: 80px; flex-shrink: 0; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: .65rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, opacity .15s;
}
.btn-primary:hover    { background: #6d28d9; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-secondary {
  background: transparent;
  color: var(--accent2);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: .4rem 1rem;
  font-size: .85rem;
  cursor: pointer;
  transition: background .15s;
}
.btn-secondary:hover { background: rgba(124,58,237,.15); }

/* TOGGLE SWITCH */
.toggle-row { display: flex; align-items: center; gap: .75rem; margin-top: .15rem; }
.toggle { display: flex; align-items: center; gap: .55rem; cursor: pointer; }
.toggle input { display: none; }
.toggle-track {
  width: 38px; height: 20px;
  background: var(--border);
  border-radius: 999px;
  position: relative;
  transition: background .2s;
  flex-shrink: 0;
}
.toggle-track::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  background: #fff;
  border-radius: 50%;
  top: 3px; left: 3px;
  transition: transform .2s;
}
.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle input:checked + .toggle-track::after { transform: translateX(18px); }
.toggle-label { font-size: .88rem; color: var(--text); }

/* DEVICE TOGGLE */
.device-toggle { display: flex; gap: 0; margin-top: .15rem; }
.device-toggle input[type=radio] { display: none; }
.device-btn {
  flex: 1;
  text-align: center;
  padding: .45rem .75rem;
  font-size: .85rem;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s, color .15s;
  color: var(--muted);
  background: transparent;
}
.device-btn:first-of-type { border-radius: 6px 0 0 6px; }
.device-btn:last-of-type  { border-radius: 0 6px 6px 0; border-left: none; }
.device-toggle input[type=radio]:checked + .device-btn {
  background: var(--accent); color: #fff; border-color: var(--accent);
}

/* PILLS */
.pill {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  padding: .15rem .5rem;
  border-radius: 999px;
  letter-spacing: .04em;
}
.pill.cached   { background: rgba(34,197,94,.12);   color: #4ade80; }
.pill.no-cache { background: rgba(245,158,11,.12);  color: #fbbf24; }
.pill.bust     { background: rgba(239,68,68,.12);   color: #f87171; }
.pill.gzip     { background: rgba(124,58,237,.15);  color: var(--accent2); }
.pill.no-gzip  { background: rgba(100,116,139,.12); color: var(--muted); }
.pill.desktop  { background: rgba(56,189,248,.12);  color: #38bdf8; }
.pill.mobile   { background: rgba(251,146,60,.12);  color: #fb923c; }

/* ── RESULT HEADER ──────────────────────────────────────────────────────────── */
.result-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}
.result-header h2 { font-size: 1.1rem; }

.badge {
  font-size: .75rem; font-weight: 600;
  padding: .25rem .65rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.badge.running   { background: rgba(245,158,11,.15); color: var(--yellow); }
.badge.completed { background: rgba(34,197,94,.15);  color: var(--green); }
.badge.failed    { background: rgba(239,68,68,.15);  color: var(--red); }

/* ── GAUGE CIRCLES ──────────────────────────────────────────────────────────── */
#gauges-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1rem 1.2rem;
  margin-bottom: 1rem;
}

.gauges-main {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.gauge-wrap {
  position: relative;
  width: 130px;
  flex-shrink: 0;
}

.gauge-svg {
  width: 130px;
  height: 130px;
  transform: rotate(-90deg);
  overflow: visible;
}

.gauge-track {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}

.gauge-ring {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 314.16;
  stroke-dashoffset: 314.16;
  transition: stroke-dashoffset .7s cubic-bezier(.4,0,.2,1),
              stroke .5s ease;
  filter: drop-shadow(0 0 5px currentColor);
}

/* Pulse animation while test is live */
@keyframes gauge-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .7; }
}
#gauges-panel.live .gauge-ring {
  animation: gauge-pulse 2s ease-in-out infinite;
}

.gauge-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.gauge-value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--mono);
  line-height: 1;
}
.gauge-sub {
  font-size: .75rem;
  color: var(--muted);
  margin-top: .1rem;
}
.gauge-title {
  font-size: .72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: .35rem;
}

/* ── STATS STRIP ────────────────────────────────────────────────────────────── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: .5rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.stat-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .2rem;
}
.sc-val {
  font-size: 1.05rem;
  font-weight: 700;
  font-family: var(--mono);
  transition: color .4s;
}
.sc-lbl {
  font-size: .68rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ── TIMING WATERFALL ───────────────────────────────────────────────────────── */
.waterfall-wrap {
  margin-top: .75rem;
  border-top: 1px solid var(--border);
  padding-top: .9rem;
}
.waterfall-title {
  font-size: .78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .6rem;
}
.wf-hint { font-weight: 400; text-transform: none; letter-spacing: 0; }

.wf-row {
  display: grid;
  grid-template-columns: 120px 1fr 70px;
  align-items: center;
  gap: .5rem;
  margin-bottom: .35rem;
}
.wf-label { font-size: .78rem; color: var(--muted); white-space: nowrap; }
.wf-bar-wrap {
  background: var(--border);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.wf-bar {
  height: 100%;
  border-radius: 999px;
  width: 0%;
  transition: width .6s cubic-bezier(.4,0,.2,1);
}
.wf-val { font-size: .78rem; font-family: var(--mono); color: var(--text); text-align: right; }

/* Phase colours */
.wf-blocked    { background: #818cf8; } /* indigo  — DNS/blocked */
.wf-connecting { background: #38bdf8; } /* sky     — TCP connect */
.wf-tls        { background: #a78bfa; } /* purple  — TLS */
.wf-sending    { background: #34d399; } /* emerald — sending */
.wf-ttfb       { background: #f59e0b; } /* amber   — TTFB (most important) */
.wf-receiving  { background: #60a5fa; } /* blue    — receiving */

.wf-p95-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-top: .4rem;
  padding-top: .4rem;
  border-top: 1px dashed var(--border);
  flex-wrap: wrap;
}
.wf-p95-label { font-size: .72rem; color: var(--muted); }
.wf-p95-val   { font-size: .85rem; font-weight: 700; font-family: var(--mono); color: var(--yellow); }

/* ── BANDWIDTH ROW ──────────────────────────────────────────────────────────── */
.bw-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .8rem 1rem;
  margin-top: .75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  flex-wrap: wrap;
}
.bw-item { display: flex; align-items: center; gap: .5rem; }
.bw-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
}
.bw-val {
  font-size: .95rem;
  font-weight: 700;
  font-family: var(--mono);
  transition: color .4s;
}
.bw-divider { width: 1px; height: 1.2rem; background: var(--border); flex-shrink: 0; }
.bw-warning {
  font-size: .78rem;
  color: var(--yellow);
  background: rgba(245,158,11,.08);
  border: 1px solid rgba(245,158,11,.25);
  border-radius: 6px;
  padding: .25rem .65rem;
  margin-left: auto;
}

/* ── THRESHOLD BANNER ───────────────────────────────────────────────────────── */
#threshold-banner {
  border-radius: 8px;
  padding: .85rem 1rem;
  margin-top: 1rem;
  border: 1px solid;
}
.threshold-banner.pass { background: rgba(34,197,94,.08);  border-color: rgba(34,197,94,.3);  color: var(--green); }
.threshold-banner.fail { background: rgba(239,68,68,.08);  border-color: rgba(239,68,68,.3);  color: var(--red); }
.threshold-banner ul   { list-style: none; margin-top: .4rem; padding: 0; }
.threshold-banner li   { font-size: .85rem; padding: .15rem 0; font-family: var(--mono); }
.threshold-banner li.pass { color: var(--green); }
.threshold-banner li.fail { color: var(--red); }

/* ── COLLAPSIBLE LOG ────────────────────────────────────────────────────────── */
#log-details {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
#log-details summary {
  padding: .6rem 1rem;
  cursor: pointer;
  font-size: .85rem;
  color: var(--muted);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .5rem;
}
#log-details summary::before {
  content: '▶';
  font-size: .7rem;
  transition: transform .15s;
}
#log-details[open] summary::before { transform: rotate(90deg); }
#log-details summary:hover { color: var(--text); background: rgba(255,255,255,.02); }

#output-log {
  background: #0a0c12;
  padding: 1rem;
  font-family: var(--mono);
  font-size: .78rem;
  line-height: 1.6;
  max-height: 380px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: #a5f3fc;
  border-top: 1px solid var(--border);
}

/* ── HISTORY ────────────────────────────────────────────────────────────────── */
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.history-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .9rem 1.1rem;
  margin-bottom: .75rem;
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: .85rem;
  align-items: center;
  cursor: pointer;
  transition: border-color .15s;
}
.history-item:hover { border-color: var(--accent); }

.history-left { display: flex; align-items: center; justify-content: center; }

.mini-gauge { width: 44px; height: 44px; overflow: visible; }

.history-body { min-width: 0; }
.history-body .row1 {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
}
.history-body .url  { font-weight: 600; word-break: break-all; font-size: .9rem; }
.history-body .meta { font-size: .78rem; color: var(--muted); }
.history-summary    { font-size: .78rem; color: var(--muted); margin-top: .3rem; font-family: var(--mono); }

.history-item .actions { display: flex; align-items: center; }
.btn-del {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  padding: .25rem;
  border-radius: 4px;
  transition: color .15s;
}
.btn-del:hover { color: var(--red); }

.empty { color: var(--muted); font-size: .9rem; }

/* ── HISTORY DETAIL ─────────────────────────────────────────────────────────── */
#history-detail {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 1.2rem;
  margin-bottom: .75rem;
}
.detail-title {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--accent2);
  word-break: break-all;
}

.detail-gauges {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.dg-wrap { position: relative; width: 80px; text-align: center; }
.dg-svg  { width: 80px; height: 80px; transform: rotate(-90deg); overflow: visible; }
.dg-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.dg-val   { font-size: 1.2rem; font-weight: 800; font-family: var(--mono); line-height: 1; }
.dg-unit  { font-size: .65rem; color: var(--muted); }
.dg-title { font-size: .6rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-top: .3rem; }

.detail-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: .5rem;
  margin-bottom: 1rem;
}
.detail-stat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem .6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .2rem;
}
.ds-val { font-size: .95rem; font-weight: 700; font-family: var(--mono); }
.ds-lbl { font-size: .65rem; color: var(--muted); text-transform: uppercase; }

#history-detail details { margin-top: .5rem; }
#history-detail details summary {
  cursor: pointer;
  font-size: .82rem;
  color: var(--muted);
  padding: .3rem 0;
  user-select: none;
  list-style: none;
}
#history-detail details summary:hover { color: var(--text); }
#history-detail pre {
  background: #0a0c12;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .75rem;
  font-family: var(--mono);
  font-size: .75rem;
  max-height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: #a5f3fc;
  margin-top: .5rem;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .form-grid  { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .stats-strip { grid-template-columns: repeat(3, 1fr); }
  .gauges-main { gap: 1.5rem; }
  .gauge-wrap, .gauge-svg { width: 110px; height: 110px; }
  .gauge-value { font-size: 1.6rem; }
  .history-item { grid-template-columns: 40px 1fr auto; }
}