/* cfspeed design system — dark-first, light-aware. */

@font-face {
  font-family: 'Inter';
  src: url('/fonts/inter.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('/fonts/space-grotesk.woff2') format('woff2');
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/jetbrains-mono.woff2') format('woff2');
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --bg: #04060c;
  --bg-2: #070b15;
  --card: rgba(148, 163, 184, 0.055);
  --card-solid: #0a0f1b;
  --border: rgba(148, 163, 184, 0.14);
  --border-soft: rgba(148, 163, 184, 0.08);
  --text: #e8eef8;
  --dim: #8b98ad;
  --down: #22d3ee;
  --down-2: #38bdf8;
  --up: #b794f6;
  --up-2: #c084fc;
  --ping: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --accent: #67e8f9;
  /* gauge gradient (phase-dependent) */
  --g1: #0ea5e9;
  --g2: #22d3ee;
  --g3: #a5f3fc;
  --shadow: 0 20px 60px rgba(2, 6, 16, 0.55);
  --radius: 18px;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f7fc;
    --bg-2: #eaeff8;
    --card: rgba(255, 255, 255, 0.72);
    --card-solid: #ffffff;
    --border: rgba(13, 27, 54, 0.12);
    --border-soft: rgba(13, 27, 54, 0.07);
    --text: #0c1728;
    --dim: #5b6a82;
    /* Semantic tokens darkened for WCAG AA on tinted chips/badges. */
    --down: #0e7490;
    --down-2: #0369a1;
    --up: #6d28d9;
    --up-2: #7e22ce;
    --ping: #047857;
    --warn: #b45309;
    --bad: #dc2626;
    --accent: #0e7490;
    --g1: #0284c7;
    --g2: #06b6d4;
    --g3: #22d3ee;
    --shadow: 0 20px 50px rgba(15, 40, 80, 0.12);
    color-scheme: light;
  }
}

body[data-phase='upload'] { --g1: #7c3aed; --g2: #a78bfa; --g3: #ddd6fe; }
body[data-phase='done'] { --g1: #0ea5e9; --g2: #22d3ee; --g3: #a5f3fc; }

* { box-sizing: border-box; }
[hidden] { display: none !important; }

:where(button, summary, a):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 8px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* ------------------------------- background art ------------------------------ */

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(52rem 30rem at 50% -8rem, rgba(34, 211, 238, 0.13), transparent 60%),
    radial-gradient(40rem 26rem at 82% 4rem, rgba(129, 140, 248, 0.10), transparent 62%),
    radial-gradient(34rem 22rem at 12% 12rem, rgba(56, 189, 248, 0.07), transparent 65%),
    var(--bg);
}
.bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.35) 1px, transparent 1.4px);
  background-size: 26px 26px;
  opacity: 0.14;
  mask-image: radial-gradient(60rem 38rem at 50% 0, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(60rem 38rem at 50% 0, #000 20%, transparent 75%);
}
@media (prefers-color-scheme: light) {
  .bg {
    background:
      radial-gradient(52rem 30rem at 50% -8rem, rgba(8, 145, 178, 0.10), transparent 60%),
      radial-gradient(40rem 26rem at 82% 4rem, rgba(124, 58, 237, 0.07), transparent 62%),
      var(--bg);
  }
  .bg::before { opacity: 0.20; }
}

/* ---------------------------------- header ----------------------------------- */

.top {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 24px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark { width: 22px; height: 22px; align-self: center; fill: url(#bmark); }
.brand-mark path { fill: var(--accent); }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--down-2), var(--down) 45%, var(--up-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-tag { color: var(--dim); font-size: 12.5px; }
.top-right { display: flex; align-items: center; gap: 10px; }

/* ----------------------------------- chips ------------------------------------ */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--dim);
  background: var(--card);
  white-space: nowrap;
}
.chip.accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.chip i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.mini-chip {
  font-size: 10.5px;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--dim);
  vertical-align: 1px;
}

/* ---------------------------------- buttons ----------------------------------- */

.btn {
  font: 600 13.5px var(--font-body);
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 9px 16px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s;
}
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.45; cursor: default; transform: none; }
.btn.primary {
  background: linear-gradient(120deg, color-mix(in srgb, var(--g1) 80%, transparent), color-mix(in srgb, var(--g2) 80%, transparent));
  border-color: color-mix(in srgb, var(--g2) 50%, transparent);
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}
@media (prefers-color-scheme: light) { .btn.primary { text-shadow: none; } }
.btn.ghost { background: transparent; }
.btn.sm { padding: 5px 11px; font-size: 12px; border-radius: 9px; }
.btn.ok { border-color: var(--ping); color: var(--ping); }
.btn.ok::after { content: ' ✓'; }

/* ----------------------------------- hero ------------------------------------- */

main { max-width: 1120px; margin: 0 auto; padding: 0 24px 64px; }

.hero { display: flex; flex-direction: column; align-items: center; padding-top: 14px; }

.phase-pill-wrap { height: 30px; display: flex; align-items: center; }
.phase-pill {
  font: 600 12px/1 var(--font-body);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  transition: color 0.3s, border-color 0.3s, background 0.3s;
}
body[data-phase='upload'] .phase-pill { color: var(--up); border-color: color-mix(in srgb, var(--up) 35%, transparent); background: color-mix(in srgb, var(--up) 9%, transparent); }
body[data-phase='done'] .phase-pill { color: var(--ping); border-color: color-mix(in srgb, var(--ping) 35%, transparent); background: color-mix(in srgb, var(--ping) 9%, transparent); }
body[data-phase='error'] .phase-pill { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, transparent); background: color-mix(in srgb, var(--bad) 9%, transparent); }

.gauge-wrap { position: relative; width: min(560px, 92vw); margin-top: 4px; }
.gauge { width: 100%; height: auto; display: block; }

.gauge-track { stroke: var(--border); stroke-width: 3.2; opacity: 0.9; }
.gauge-progress { stroke-width: 8; transition: none; }
.gauge-halo { stroke-width: 8; opacity: 0.38; }
.gauge-tip { fill: #fff; opacity: 0; transition: opacity 0.3s; }
.tick { stroke: var(--border); stroke-width: 1; }
.tick.major { stroke: var(--dim); stroke-width: 1.4; }
.tick-label { fill: var(--dim); font: 500 9.5px var(--font-mono); }

.gauge-center {
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}
.big-num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(56px, 12vw, 92px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
  color: var(--text);
  text-shadow: 0 0 34px color-mix(in srgb, var(--g2) 36%, transparent);
}
.big-unit {
  pointer-events: auto;
  margin-top: 2px;
  font: 600 15px var(--font-body);
  color: var(--dim);
  background: none;
  border: none;
  border-bottom: 1px dashed color-mix(in srgb, var(--dim) 55%, transparent);
  cursor: pointer;
  padding: 1px 2px;
}
.big-unit:hover { color: var(--text); }

.sub-line {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: -6px;
  min-height: 34px;
  color: var(--dim);
  font-size: 13.5px;
  opacity: 0;
  transition: opacity 0.4s;
}
.sub-line.show { opacity: 1; }
.sub-item { display: inline-flex; align-items: center; gap: 8px; }
.sub-item b { color: var(--text); font-variant-numeric: tabular-nums; font-weight: 600; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.down { background: var(--down); box-shadow: 0 0 8px var(--down); }
.dot.up { background: var(--up); box-shadow: 0 0 8px var(--up); }
.dot.ping { background: var(--ping); box-shadow: 0 0 8px var(--ping); }
.dot.warn { background: var(--warn); box-shadow: 0 0 8px var(--warn); }

.streams { display: inline-flex; align-items: flex-end; gap: 3px; height: 22px; }
.stream { width: 5px; height: 100%; display: flex; align-items: flex-end; background: color-mix(in srgb, var(--border) 60%, transparent); border-radius: 3px; overflow: hidden; }
.stream i { display: block; width: 100%; background: linear-gradient(to top, var(--g1), var(--g2)); border-radius: 3px; transition: height 0.25s ease; }
.stream.done { opacity: 0.35; }

/* ----------------------------------- tiles ------------------------------------ */

.tiles {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-top: 26px;
}
.tile {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 14px 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-height: 92px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.3s, transform 0.3s;
}
.tile.filled { border-color: var(--border); }
.tile-label { font-size: 12px; color: var(--dim); display: flex; align-items: center; gap: 7px; letter-spacing: 0.02em; }
.tile-label .dot { width: 6.5px; height: 6.5px; box-shadow: none; }
.tile-value {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  gap: 5px;
  min-height: 31px;
}
.tile-value small { font-size: 13px; color: var(--dim); font-family: var(--font-body); font-weight: 500; }
.tile-sub { font-size: 11.5px; color: var(--dim); min-height: 16px; font-variant-numeric: tabular-nums; }

.grade {
  font-family: var(--font-display);
  font-weight: 700;
  padding: 1px 10px 2px;
  border-radius: 9px;
  font-size: 22px;
}
.grade.sm { font-size: 12px; padding: 1px 7px; border-radius: 6px; }
.grade.good { color: var(--ping); background: color-mix(in srgb, var(--ping) 12%, transparent); }
.grade.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.grade.bad { color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, transparent); }

/* ---------------------------------- results ----------------------------------- */

.results { margin-top: 34px; opacity: 0.35; transition: opacity 0.5s; }
.results.revealed { opacity: 1; }
.results-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.results-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.actions { display: flex; gap: 9px; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.card.span2 { grid-column: span 2; }
.card h3 { margin: 0 0 12px; font: 600 14px var(--font-body); letter-spacing: 0.01em; }
.card h4 { margin: 14px 0 8px; font: 600 12.5px var(--font-body); color: var(--dim); }
.card h4.mt { margin-top: 18px; }
.card-head-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-head-row h3 { margin: 0; }
.dim { color: var(--dim); font-weight: 400; }

/* charts */
.chart-wrap { width: 100%; }
.chart { display: block; }
.chart .grid { stroke: var(--border-soft); stroke-width: 1; }
.chart .axis { fill: var(--dim); font: 500 10px var(--font-mono); }
.chart .avg-line { stroke-dasharray: 5 5; opacity: 0.6; stroke-width: 1.2; }
.chart .avg-label { font: 600 10px var(--font-mono); }
.chart .crosshair { stroke: var(--dim); stroke-width: 1; stroke-dasharray: 3 3; opacity: 0.7; }
.chart-line { filter: drop-shadow(0 0 6px color-mix(in srgb, currentColor 40%, transparent)); }
.chart-tip {
  position: absolute;
  top: 8px;
  display: none;
  flex-direction: column;
  gap: 2px;
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 11px;
  font-size: 11.5px;
  pointer-events: none;
  z-index: 5;
  box-shadow: var(--shadow);
}
.chart-tip b { font-family: var(--font-mono); font-size: 10.5px; color: var(--dim); }
.chart-tip span { display: inline-flex; align-items: center; gap: 6px; font-variant-numeric: tabular-nums; }
.chart-tip i { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.chart-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* histogram */
.histo { display: flex; align-items: flex-end; gap: 4px; height: 68px; }
.histo-col { flex: 1; display: flex; align-items: flex-end; }
.histo-bar {
  width: 100%;
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(to top, color-mix(in srgb, var(--ping) 55%, transparent), var(--ping));
  min-height: 2px;
}
.histo-labels { display: flex; justify-content: space-between; color: var(--dim); font: 500 10.5px var(--font-mono); margin-top: 6px; }

/* connection rows */
.conn-rows { display: flex; flex-direction: column; }
.conn-rows .row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 8.5px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13.5px;
}
.conn-rows .row:last-child { border-bottom: none; }
.conn-rows .row span:first-child { color: var(--dim); white-space: nowrap; }
.conn-rows .row span:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.conn-rows code { font-family: var(--font-mono); font-size: 12.5px; }

/* scores */
.scores { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.score {
  border: 1px solid var(--border-soft);
  border-radius: 13px;
  padding: 11px 13px;
  background: color-mix(in srgb, var(--card-solid) 40%, transparent);
}
.score-head { display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 13px; }
.score p { margin: 6px 0 0; color: var(--dim); font-size: 12px; line-height: 1.45; }

/* real world */
.realworld { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; }
.rw { display: flex; align-items: center; gap: 11px; padding: 7px 0; }
.rw-icon { font-size: 19px; width: 26px; text-align: center; }
.rw b { display: block; font-size: 12.5px; font-weight: 600; }
.rw span:last-child { color: var(--dim); font-size: 12px; font-variant-numeric: tabular-nums; }
.rw > div { min-width: 0; }

/* history */
.history-spark { display: flex; align-items: flex-end; gap: 4px; height: 44px; margin-bottom: 12px; }
.history-spark i {
  flex: 1;
  max-width: 26px;
  background: linear-gradient(to top, color-mix(in srgb, var(--down) 40%, transparent), var(--down));
  border-radius: 4px 4px 2px 2px;
  min-height: 5px;
}
.history-list { display: flex; flex-direction: column; }
.hrow {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 0.9fr 0.6fr 0.6fr;
  gap: 10px;
  align-items: center;
  padding: 7.5px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.hrow:last-child { border-bottom: none; }
.delta.good { color: var(--ping); }
.delta.bad { color: var(--bad); }

/* methodology */
.method {
  margin-top: 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--card);
  overflow: hidden;
}
.method summary {
  cursor: pointer;
  padding: 15px 20px;
  font-weight: 600;
  font-size: 13.5px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.method summary::before { content: '▸'; color: var(--accent); transition: transform 0.2s; }
.method[open] summary::before { transform: rotate(90deg); }
.method summary::-webkit-details-marker { display: none; }
.method-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 34px;
  padding: 2px 22px 18px;
}
.method-body h4 { margin: 14px 0 5px; font-size: 13px; }
.method-body p { margin: 0 0 8px; color: var(--dim); font-size: 12.8px; line-height: 1.55; }
.method-body code { font-family: var(--font-mono); font-size: 11.5px; color: var(--accent); }

/* debug + footer */
#debugPanel {
  margin-top: 18px;
  background: var(--card-solid);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  font: 11px/1.5 var(--font-mono);
  overflow: auto;
  max-height: 420px;
}
footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 24px 34px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--dim);
  font-size: 12.5px;
  border-top: 1px solid var(--border-soft);
}

/* -------------------------------- responsive ---------------------------------- */

@media (max-width: 980px) {
  .tiles { grid-template-columns: repeat(3, 1fr); }
  .grid { grid-template-columns: 1fr; }
  .card.span2 { grid-column: span 1; }
  .method-body { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .top { padding: 14px 16px 2px; flex-wrap: wrap; }
  .top-right { margin-left: auto; }
  .top-right .btn { padding: 7px 12px; font-size: 12.5px; }
  .chip { font-size: 11.5px; padding: 4px 9px; }
  .brand-tag { display: none; }
  main { padding: 0 14px 40px; }
  .tiles { grid-template-columns: repeat(2, 1fr); gap: 9px; }
  .tile { min-height: 84px; padding: 12px 13px 10px; }
  .tile-value { font-size: 22px; }
  .scores { grid-template-columns: 1fr; }
  .realworld { grid-template-columns: 1fr; }
  .hrow { grid-template-columns: 1.2fr 1fr 1fr 0.9fr; }
  .hrow span:nth-child(5), .hrow span:nth-child(6) { display: none; }
  .sub-line { gap: 16px; font-size: 12.5px; }
  footer { flex-direction: column; gap: 4px; }
}

/* ------------------------------- reduced motion -------------------------------- */

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}