/* ============================================================ tokens */
:root {
  --bg: #f5f7fb;
  --bg-grad: radial-gradient(1200px 500px at 50% -120px, rgba(59, 130, 246, 0.10), transparent 70%);
  --surface: #ffffff;
  --surface-2: #f3f6fb;
  --surface-3: #e9eef6;
  --border: #e3e8f0;
  --border-strong: #cfd7e3;
  --text: #0b1324;
  --text-2: #334155;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --accent-soft: rgba(37, 99, 235, 0.10);
  --c-down: #0891b2;
  --c-down-2: #2563eb;
  --c-up: #8b5cf6;
  --c-up-2: #d946ef;
  --c-lat: #f59e0b;
  --c-jit: #10b981;
  --c-unloaded: #2563eb;
  --grid: #e8edf4;
  --great: #059669;
  --good: #16a34a;
  --average: #d97706;
  --poor: #ea580c;
  --bad: #dc2626;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -8px rgba(15, 23, 42, 0.08);
  --radius: 14px;
  --radius-sm: 8px;
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #070b14;
    --bg-grad: radial-gradient(1200px 520px at 50% -140px, rgba(59, 130, 246, 0.18), transparent 70%);
    --surface: #0e1524;
    --surface-2: #131c2f;
    --surface-3: #1a253b;
    --border: #1e2a41;
    --border-strong: #2a3854;
    --text: #e8edf7;
    --text-2: #c3cddd;
    --muted: #8a97ad;
    --accent: #4f8bff;
    --accent-soft: rgba(79, 139, 255, 0.14);
    --c-down: #22d3ee;
    --c-down-2: #4f8bff;
    --c-up: #a78bfa;
    --c-up-2: #e879f9;
    --c-lat: #fbbf24;
    --c-jit: #34d399;
    --c-unloaded: #4f8bff;
    --grid: #1b263b;
    --great: #34d399;
    --good: #4ade80;
    --average: #fbbf24;
    --poor: #fb923c;
    --bad: #f87171;
    --shadow-sm: none;
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.02) inset;
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --bg: #070b14;
  --bg-grad: radial-gradient(1200px 520px at 50% -140px, rgba(59, 130, 246, 0.18), transparent 70%);
  --surface: #0e1524;
  --surface-2: #131c2f;
  --surface-3: #1a253b;
  --border: #1e2a41;
  --border-strong: #2a3854;
  --text: #e8edf7;
  --text-2: #c3cddd;
  --muted: #8a97ad;
  --accent: #4f8bff;
  --accent-soft: rgba(79, 139, 255, 0.14);
  --c-down: #22d3ee;
  --c-down-2: #4f8bff;
  --c-up: #a78bfa;
  --c-up-2: #e879f9;
  --c-lat: #fbbf24;
  --c-jit: #34d399;
  --c-unloaded: #4f8bff;
  --grid: #1b263b;
  --great: #34d399;
  --good: #4ade80;
  --average: #fbbf24;
  --poor: #fb923c;
  --bad: #f87171;
  --shadow-sm: none;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.02) inset;
  color-scheme: dark;
}

/* ============================================================ base */
* { box-sizing: border-box; }
html, body { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  background: var(--bg-grad), var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  font: 13.5px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h2 { font-size: 14.5px; display: flex; align-items: center; gap: 8px; }
h2 svg { color: var(--muted); }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 0.92em; letter-spacing: -0.01em; }
[hidden] { display: none !important; }
svg use { pointer-events: none; }

/* ============================================================ top bar */
.topbar {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; max-width: 1160px; margin: 0 auto; padding: 9px 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand-name { font-weight: 700; font-size: 16px; letter-spacing: -0.02em; }
.brand-tag { font-size: 11px; color: var(--muted); padding: 2px 8px; border: 1px solid var(--border); border-radius: 99px; }
.top-actions { display: flex; align-items: center; gap: 6px; }
.seg { display: inline-flex; padding: 3px; border: 1px solid var(--border); border-radius: 99px; background: var(--surface); }
.seg button { border: 0; background: transparent; color: var(--muted); padding: 3px 9px; border-radius: 99px; font: 600 11px var(--font); cursor: pointer; }
.seg button.active { background: var(--text); color: var(--bg); }

/* ============================================================ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: 34px; padding: 0 12px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: var(--radius-sm); font: 500 13px var(--font); cursor: pointer; text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: background .15s, border-color .15s, color .15s, transform .06s, box-shadow .15s;
}
.btn:hover { border-color: var(--border-strong); background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible, .seg button:focus-visible, .info:focus-visible, .tabs button:focus-visible, .copy:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn.ghost { background: transparent; border-color: transparent; box-shadow: none; color: var(--text-2); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.icon { width: 34px; padding: 0; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); background: var(--accent); }
.btn.danger { color: var(--bad); }
#btn-theme .i-sun { display: none; }
:root[data-theme='dark'] #btn-theme .i-sun { display: block; }
:root[data-theme='dark'] #btn-theme .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) #btn-theme .i-sun { display: block; }
  :root:not([data-theme='light']) #btn-theme .i-moon { display: none; }
}

/* ============================================================ layout */
.container { max-width: 1160px; margin: 0 auto; padding: 16px 16px 32px; display: grid; gap: 14px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px; min-width: 0;
}
.card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.card-head h2 { flex: 1; }
.chip { display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); font-size: 11px; color: var(--text-2); white-space: nowrap; }
.chip.sm { height: 18px; padding: 0 6px; font-size: 10px; font-weight: 600; }
.chip:empty { display: none; }
.banner {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); border-radius: var(--radius); padding: 12px 16px;
}
.banner-text { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; color: var(--accent); }
.banner-text strong { color: var(--text); }

/* ============================================================ hero */
.hero { display: grid; grid-template-columns: minmax(240px, 320px) 1fr; gap: 22px; padding: 22px; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: -40% auto auto -10%; width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(closest-side, var(--accent-soft), transparent); pointer-events: none;
}
.hero > * { position: relative; }
.hero-gauge { display: flex; flex-direction: column; align-items: center; gap: 14px; }

.gauge { position: relative; width: 100%; max-width: 270px; aspect-ratio: 1; }
.gauge-svg { width: 100%; height: 100%; display: block; overflow: visible; }
.gauge-track { fill: none; stroke: var(--surface-3); stroke-width: 15; stroke-linecap: round; }
.gauge-fill { fill: none; stroke: url(#g-down); stroke-width: 15; stroke-linecap: round; stroke-dasharray: 100 200; stroke-dashoffset: 100; transition: stroke-dashoffset .35s cubic-bezier(.2,.8,.2,1), opacity .2s; filter: drop-shadow(0 0 10px color-mix(in srgb, var(--c-down) 45%, transparent)); }
.gauge.upload .gauge-fill { stroke: url(#g-up); filter: drop-shadow(0 0 10px color-mix(in srgb, var(--c-up) 45%, transparent)); }
#g-down stop:first-child { stop-color: var(--c-down-2); }
#g-down stop:last-child { stop-color: var(--c-down); }
#g-up stop:first-child { stop-color: var(--c-up-2); }
#g-up stop:last-child { stop-color: var(--c-up); }
.gauge-tick { fill: var(--muted); font: 500 10.5px var(--font); font-variant-numeric: tabular-nums; }
.gauge-tick-line { stroke: var(--border-strong); stroke-width: 1.5; }
.gauge-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; padding-top: 8px; }
.gauge-phase { display: flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; min-height: 18px; }
.gauge-phase svg { color: var(--c-down); }
.gauge.upload .gauge-phase svg { color: var(--c-up); }
.gauge-value { font-size: clamp(40px, 8vw, 54px); font-weight: 700; letter-spacing: -0.035em; line-height: 1.05; font-variant-numeric: tabular-nums; }
.gauge-unit { font-size: 13px; color: var(--muted); font-weight: 500; }

.controls { display: flex; gap: 10px; }
.btn.play { height: 38px; padding: 0 18px; border-radius: 99px; font-weight: 600; min-width: 120px; box-shadow: 0 6px 18px -6px color-mix(in srgb, var(--accent) 70%, transparent); }
.controls .btn:not(.play) { height: 38px; border-radius: 99px; padding: 0 15px; }
.btn.play .i-pause { display: none; }
body.running .btn.play .i-play { display: none; }
body.running .btn.play .i-pause { display: block; }

.hero-side { display: flex; flex-direction: column; gap: 10px; justify-content: center; min-width: 0; }
.metrics-main { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric {
  --c: var(--accent);
  position: relative; background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 11px 14px 8px; min-width: 0; overflow: hidden; transition: border-color .2s, box-shadow .2s;
}
.metric.m-down { --c: var(--c-down); }
.metric.m-up { --c: var(--c-up); }
.metric.m-lat { --c: var(--c-lat); }
.metric.m-jit { --c: var(--c-jit); }
.metric header { display: flex; align-items: center; gap: 7px; color: var(--text-2); font-size: 12px; font-weight: 500; }
.m-icon { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 6px; color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); }
.m-value { font-size: 25px; font-weight: 700; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; margin-top: 4px; line-height: 1.1; }
.m-value small { font-size: 11.5px; color: var(--muted); margin-left: 5px; font-weight: 500; letter-spacing: 0; }
.spark { display: block; width: 100%; height: 22px; margin-top: 4px; overflow: visible; }
.spark .sp-line { fill: none; stroke: var(--c); stroke-width: 1.6; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.spark .sp-area { fill: color-mix(in srgb, var(--c) 14%, transparent); stroke: none; }
.metric.active, .mini.active { border-color: color-mix(in srgb, var(--c, var(--accent)) 60%, transparent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c, var(--accent)) 14%, transparent); }
.metric.active .m-icon { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--c) 0%, transparent), 0 0 0 0 color-mix(in srgb, var(--c) 30%, transparent); transform: scale(1.06); } }

.metrics-sub { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mini { display: flex; flex-direction: column; gap: 1px; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); min-width: 0; }
.mini-label { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mini-value { font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.mini-value b { font-size: 15px; font-weight: 650; color: var(--text); }

.hero-foot { grid-column: 1 / -1; border-top: 1px solid var(--border); padding-top: 14px; display: grid; gap: 8px; }
.stepper { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.stepper li { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); font-weight: 500; min-width: 0; }
.stepper li > span:last-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stepper .dot { flex: none; display: grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--border-strong); color: transparent; background: var(--surface); transition: all .2s; }
.stepper li.active { color: var(--text); }
.stepper li.active .dot { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); animation: ring 1.4s ease-in-out infinite; }
.stepper li.done { color: var(--text-2); }
.stepper li.done .dot { background: var(--good); border-color: var(--good); color: #fff; }
@keyframes ring { 50% { box-shadow: 0 0 0 7px transparent; } }
.progress-row { display: flex; align-items: center; gap: 12px; }
.progress { flex: 1; height: 5px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.progress-bar { height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--c-down-2), var(--c-down), var(--c-up)); background-size: 200% 100%; transition: width .35s ease; }
body.running .progress-bar { animation: flow 2s linear infinite; }
@keyframes flow { to { background-position: -200% 0; } }
.progress-pct { font-size: 11px; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 36px; text-align: right; }
.status-line { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-2); flex-wrap: wrap; min-height: 20px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
body.running .status-dot { background: var(--good); animation: blink 1s infinite; }
body.finished .status-dot { background: var(--good); }
body.paused .status-dot { background: var(--average); }
body.error .status-dot { background: var(--bad); }
@keyframes blink { 50% { opacity: .3; } }
.live { color: var(--muted); font-variant-numeric: tabular-nums; margin-left: auto; }

/* ============================================================ connection path */
.path { display: grid; grid-template-columns: 1fr minmax(110px, 180px) 1fr; gap: 14px; align-items: stretch; }
.endpoint { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; min-width: 0; }
.ep-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.ep-icon { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; flex: none; }
.ep-icon.client { color: var(--c-down); background: color-mix(in srgb, var(--c-down) 14%, transparent); }
.ep-icon.server { color: var(--c-up); background: color-mix(in srgb, var(--c-up) 14%, transparent); }
.ep-title { font-weight: 600; }
.ep-sub { font-size: 12px; color: var(--muted); overflow-wrap: anywhere; }
.ip-row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; padding: 8px 10px; border-radius: 8px; background: var(--surface); border: 1px solid var(--border); }
.ip-label { font-size: 11px; color: var(--muted); width: 100%; }
.ip { font-size: 15px; font-weight: 500; color: var(--text); overflow-wrap: anywhere; min-width: 0; flex: 1; }
.copy { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface-2); color: var(--muted); cursor: pointer; flex: none; }
.copy:hover { color: var(--accent); border-color: var(--accent); }
.ep-list { margin: 10px 0 0; display: grid; gap: 6px; }
.ep-list > div { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; }
.ep-list dt { color: var(--muted); white-space: nowrap; }
.ep-list dd { margin: 0; font-weight: 500; text-align: right; overflow-wrap: anywhere; min-width: 0; }

.link { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; }
.link-line { position: relative; width: 100%; height: 2px; background: repeating-linear-gradient(90deg, var(--border-strong) 0 6px, transparent 6px 12px); }
.link-line::before, .link-line::after { content: ''; position: absolute; top: 50%; width: 8px; height: 8px; border-radius: 50%; transform: translateY(-50%); }
.link-line::before { left: -4px; background: var(--c-down); }
.link-line::after { right: -4px; background: var(--c-up); }
.pulse { position: absolute; top: 50%; left: 0; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); transform: translate(-50%, -50%); box-shadow: 0 0 12px var(--accent); opacity: 0; }
body.running .pulse { animation: travel 1.6s ease-in-out infinite; }
@keyframes travel { 0% { left: 0; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { left: 100%; opacity: 0; } }
.link-stats { text-align: center; font-size: 12px; color: var(--muted); }
.link-stats b { font-size: 18px; color: var(--text); font-weight: 700; font-variant-numeric: tabular-nums; }

/* ============================================================ quality */
.quality { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.q { --qc: var(--muted); background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; display: grid; gap: 11px; }
.q-top { display: flex; gap: 10px; align-items: flex-start; }
.q-icon { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; color: var(--accent); background: var(--accent-soft); flex: none; }
.q-title { font-weight: 600; font-size: 13px; }
.q-desc { font-size: 11px; color: var(--muted); line-height: 1.4; margin-top: 2px; }
.meter { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.meter i { height: 5px; border-radius: 99px; background: var(--surface-3); transition: background .3s; }
.q-cls { font-size: 12.5px; font-weight: 650; color: var(--qc); display: flex; justify-content: space-between; }
.q-cls small { color: var(--muted); font-weight: 500; font-size: 11px; }
.q[data-cls='bad'] { --qc: var(--bad); }
.q[data-cls='poor'] { --qc: var(--poor); }
.q[data-cls='average'] { --qc: var(--average); }
.q[data-cls='good'] { --qc: var(--good); }
.q[data-cls='great'] { --qc: var(--great); }
.q[data-lvl='1'] .meter i:nth-child(-n + 1),
.q[data-lvl='2'] .meter i:nth-child(-n + 2),
.q[data-lvl='3'] .meter i:nth-child(-n + 3),
.q[data-lvl='4'] .meter i:nth-child(-n + 4),
.q[data-lvl='5'] .meter i { background: var(--qc); }

/* ============================================================ tabs & details */
.tabs { display: flex; gap: 4px; padding: 4px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 14px; overflow-x: auto; scrollbar-width: none; }
.tabs button { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 7px; border: 0; background: transparent; color: var(--muted); padding: 7px 12px; border-radius: 7px; font: 500 12.5px var(--font); cursor: pointer; white-space: nowrap; }
.tabs button:hover { color: var(--text); }
.tabs button[aria-selected='true'] { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm), 0 0 0 1px var(--border); }
.panel-hint { margin: 0 0 12px; font-size: 12px; color: var(--muted); max-width: 820px; }
.panel-kpi { display: flex; align-items: baseline; gap: 8px; margin-bottom: 14px; }
.kpi-value { font-size: 32px; font-weight: 700; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.kpi-unit { font-size: 13px; color: var(--muted); font-weight: 500; margin-right: 8px; }
.stats-3, .stats-4 { display: grid; gap: 10px; margin-bottom: 12px; }
.stats-3 { grid-template-columns: repeat(3, 1fr); }
.stats-4 { grid-template-columns: repeat(4, 1fr); }
.stat { --c: var(--border-strong); position: relative; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px 10px 14px; overflow: hidden; }
.stat::before { content: ''; position: absolute; left: 0; top: 10px; bottom: 10px; width: 3px; border-radius: 0 3px 3px 0; background: var(--c); }
.stat.s-unloaded { --c: var(--c-unloaded); }
.stat.s-down { --c: var(--c-down); }
.stat.s-up { --c: var(--c-up); }
.s-label { font-size: 11px; color: var(--muted); font-weight: 500; }
.s-value { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.s-value small { font-size: 11.5px; color: var(--muted); margin-left: 4px; font-weight: 500; }
.s-sub { font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums; }
.s-sub b { color: var(--text-2); font-weight: 600; }
.inc-bad { color: var(--bad); font-weight: 600; }
.inc-ok { color: var(--good); font-weight: 600; }
.chart-box { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-top: 10px; }
.chart-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 6px; }
.legend { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; color: var(--muted); font-size: 11px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; margin-left: 8px; }
.lg-ok { background: var(--good); } .lg-lost { background: var(--bad); } .lg-sent { background: var(--muted); opacity: .45; }

/* charts */
.chart-wrap { width: 100%; min-height: 40px; }
.chart { display: block; overflow: visible; }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .tick { fill: var(--muted); font: 10.5px var(--font); font-variant-numeric: tabular-nums; }
.chart .row-label { fill: var(--text); font: 600 12px var(--font); }
.chart .row-sub { fill: var(--muted); font: 10.5px var(--font); }
.chart .whisker { stroke-width: 1.5; }
.chart .box { fill-opacity: .16; stroke-width: 1.5; }
.chart .median { stroke: var(--text); stroke-width: 2; }
.chart .dot { fill-opacity: .8; }
.chart .dot:hover { fill-opacity: 1; r: 4.5; }
.chart .trend { fill: none; stroke-width: 1.6; stroke-opacity: .55; }

/* packets */
.packets { display: grid; grid-template-columns: repeat(100, 1fr); gap: 2px; }
.packets i { display: block; aspect-ratio: 1; border-radius: 2px; background: var(--surface-3); transition: background .15s; }
.packets i.ok { background: var(--good); opacity: .8; }
.packets i.lost { background: var(--bad); }
.packets i.sent { background: var(--muted); opacity: .45; }
.alert { margin: 12px 0 0; padding: 10px 14px; border-radius: 10px; background: color-mix(in srgb, var(--average) 12%, transparent); color: var(--text-2); font-size: 13px; border: 1px solid color-mix(in srgb, var(--average) 35%, transparent); }

/* ============================================================ actions */
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.actions-left { display: flex; gap: 8px; flex-wrap: wrap; }
.switch { display: inline-flex; align-items: center; gap: 10px; color: var(--text-2); font-size: 12.5px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track { position: relative; width: 34px; height: 20px; border-radius: 99px; background: var(--surface-3); border: 1px solid var(--border-strong); transition: background .2s; }
.switch .track::after { content: ''; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); transition: transform .2s; }
.switch input:checked + .track { background: var(--accent); border-color: var(--accent); }
.switch input:checked + .track::after { transform: translateX(14px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ============================================================ faq */
.faq { display: grid; gap: 6px; }
.faq details { border: 1px solid var(--border); border-radius: 10px; padding: 0 14px; background: var(--surface-2); transition: background .2s; }
.faq details[open] { background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 500; font-size: 13px; padding: 11px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--muted); font-size: 18px; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { margin: 0 0 12px; color: var(--muted); font-size: 12.5px; }

/* ============================================================ popover / dialog / toast */
.info { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 8px; border: 1px solid transparent; background: transparent; color: var(--muted); cursor: pointer; flex: none; }
.info:hover { background: var(--surface-2); color: var(--text); }
.popover {
  position: fixed; z-index: 50; max-width: min(340px, calc(100vw - 32px));
  background: var(--text); color: var(--bg); padding: 9px 11px; border-radius: 8px; font-size: 12px; line-height: 1.45;
  box-shadow: 0 12px 32px rgba(0,0,0,.25);
}
.dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 22px; width: min(900px, calc(100vw - 32px)); box-shadow: 0 24px 64px rgba(0,0,0,.3); }
.dialog::backdrop { background: rgba(2, 6, 23, .55); backdrop-filter: blur(3px); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.dialog-foot { display: flex; justify-content: flex-end; margin-top: 14px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 12px; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
th { color: var(--muted); font-weight: 500; font-size: 11px; background: var(--surface-2); }
td .btn { height: 26px; padding: 0 9px; font-size: 11.5px; }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 60; max-width: calc(100vw - 32px); overflow-wrap: anywhere;
  background: var(--text); color: var(--bg); padding: 9px 14px; border-radius: 8px; font-size: 12.5px; box-shadow: 0 12px 32px rgba(0,0,0,.25);
  animation: toast-in .2s ease-out;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } }
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 8px 16px 32px; }

/* ============================================================ responsive */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; padding: 18px; }
  .path { grid-template-columns: 1fr; }
  .link { flex-direction: row; padding: 4px 8px; }
  .link-line { width: 2px; height: 48px; background: repeating-linear-gradient(180deg, var(--border-strong) 0 6px, transparent 6px 12px); flex: none; }
  .link-line::before { left: 50%; top: -4px; transform: translateX(-50%); }
  .link-line::after { left: 50%; right: auto; top: auto; bottom: -4px; transform: translateX(-50%); }
  .link-stats { text-align: left; }
  body.running .pulse { animation-name: travel-v; }
  @keyframes travel-v { 0% { top: 0; left: 50%; opacity: 0; } 15%, 85% { opacity: 1; } 100% { top: 100%; left: 50%; opacity: 0; } }
  .quality { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { padding-top: 12px; }
  .card { padding: 14px; }
  .hide-sm, .brand-tag { display: none; }
  .stats-3 { grid-template-columns: 1fr; }
  .stats-4 { grid-template-columns: 1fr 1fr; }
  .metrics-sub { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .mini { padding: 8px 10px; }
  .mini-value b { font-size: 14px; }
  .m-value { font-size: 22px; }
  .stepper { grid-template-columns: repeat(4, auto); justify-content: space-between; }
  .stepper li > span:last-child { display: none; }
  .stepper li.active > span:last-child { display: inline; }
  .tabs button span { display: none; }
  .tabs button[aria-selected='true'] span { display: inline; }
  .packets { grid-template-columns: repeat(50, 1fr); }
  .live { margin-left: 0; width: 100%; }
}
@media (max-width: 420px) {
  .hide-xs { display: none; }
  .metrics-main { gap: 8px; }
  .metric { padding: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ============================================================ compact icon sizes */
.q-icon svg, .ep-icon svg { width: 18px; height: 18px; }
.metric header svg, .mini-label svg { width: 13px; height: 13px; }
.tabs button svg, h2 svg { width: 15px; height: 15px; }
.btn svg { width: 15px; height: 15px; }
.stepper .dot svg { width: 10px; height: 10px; }