/* ReadyServer network test — brand tokens follow readyserver.sg.
   No external fonts or CDN assets on purpose: this page measures the network,
   so it must not depend on one. */
:root {
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --green-500: #22c55e;
  --green-700: #15803d;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --red-500: #ef4444;
  --red-600: #dc2626;

  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: var(--blue-600);
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 12px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #111a2e;
    --surface-2: #0f172a;
    --border: #1e293b;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: var(--blue-400);
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 860px; margin: 0 auto; padding: 32px 20px 72px; }

header { margin-bottom: 28px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; }
.brand .dot { width: 10px; height: 10px; border-radius: 3px; background: var(--green-500); box-shadow: 0 0 12px var(--green-500); }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.1rem); line-height: 1.2; margin: 18px 0 8px; letter-spacing: -.02em; }
.lede { color: var(--muted); margin: 0; max-width: 60ch; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 20px 0;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 1.05rem; margin: 0 0 4px; letter-spacing: -.01em; }
.card .hint { color: var(--muted); font-size: .9rem; margin: 0 0 16px; }

button {
  font: inherit;
  font-weight: 600;
  border: 0;
  border-radius: 10px;
  padding: 12px 22px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: filter .15s ease, transform .05s ease;
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); }

.controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.modes { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.modes label { padding: 9px 16px; cursor: pointer; font-size: .9rem; color: var(--muted); }
.modes input { position: absolute; opacity: 0; pointer-events: none; }
.modes input:checked + span { color: #fff; }
.modes label:has(input:checked) { background: var(--accent); }

.fields { display: grid; gap: 12px; margin-top: 18px; }
@media (min-width: 620px) { .fields { grid-template-columns: 1fr 1fr; } }
.fields label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 5px; }
input[type=text], textarea {
  font: inherit; width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface-2); color: var(--text);
}
textarea { min-height: 44px; resize: vertical; }

/* progress */
#phases { list-style: none; margin: 0; padding: 0; }
#phases li {
  display: flex; align-items: baseline; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--border);
  font-size: .95rem;
}
#phases li:last-child { border-bottom: 0; }
#phases .mark { width: 1.3em; flex: none; text-align: center; color: var(--muted); }
#phases li[data-state=run] .mark { color: var(--accent); }
#phases li[data-state=done] .mark { color: var(--green-500); }
#phases li[data-state=warn] .mark { color: var(--amber-500); }
#phases li[data-state=fail] .mark { color: var(--red-500); }
#phases .name { flex: 1; }
#phases .val { font-family: var(--font-mono); font-size: .85rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.bar { height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-top: 14px; }
.bar > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--blue-500), var(--green-500)); transition: width .2s ease; }

/* results */
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.stat { background: var(--surface-2); border-radius: 10px; padding: 14px 16px; }
.stat .k { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.stat .v { font-size: 1.5rem; font-weight: 650; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.stat .u { font-size: .85rem; font-weight: 400; color: var(--muted); margin-left: 3px; }

.verdict { display: flex; gap: 12px; align-items: flex-start; padding: 16px; border-radius: 10px; margin-bottom: 18px; }
.verdict.good { background: color-mix(in srgb, var(--green-500) 12%, transparent); }
.verdict.fair { background: color-mix(in srgb, var(--amber-500) 14%, transparent); }
.verdict.poor { background: color-mix(in srgb, var(--red-500) 12%, transparent); }
.verdict .t { font-weight: 650; }
.verdict p { margin: 2px 0 0; font-size: .92rem; }

ul.flags { margin: 16px 0 0; padding-left: 20px; font-size: .93rem; }
ul.flags li { margin: 5px 0; }

table { border-collapse: collapse; width: 100%; font-size: .9rem; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; }
tr.you { background: color-mix(in srgb, var(--accent) 10%, transparent); font-weight: 600; }
.scroll { overflow-x: auto; margin: 0 -6px; padding: 0 6px; }

code, .ref { font-family: var(--font-mono); }
.ref { font-size: 1.25rem; font-weight: 650; letter-spacing: .06em; color: var(--accent); }

details { margin-top: 16px; }
summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
pre {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 9px;
  padding: 14px; overflow: auto; max-height: 340px; font-size: .78rem; line-height: 1.45;
}
footer { color: var(--muted); font-size: .85rem; margin-top: 32px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }

/* location comparison */
table.cmp th.loc { text-align: right; }
table.cmp td.v { text-align: right; }
table.cmp td.win { color: var(--green-700); font-weight: 650; }
@media (prefers-color-scheme: dark) { table.cmp td.win { color: var(--green-500); } }
table.cmp td.sep { padding-top: 16px; font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); border-bottom: 0; }
table.cmp tr.src td { font-size: .78rem; color: var(--muted); }
.chip { display: inline-block; font-size: .75rem; font-weight: 600; padding: 1px 8px; border-radius: 99px; }
.chip.good { background: color-mix(in srgb, var(--green-500) 18%, transparent); }
.chip.fair { background: color-mix(in srgb, var(--amber-500) 22%, transparent); }
.chip.poor { background: color-mix(in srgb, var(--red-500) 18%, transparent); }
#flags h3 { font-size: .95rem; margin: 20px 0 4px; }
#flags ul { margin: 0; padding-left: 20px; font-size: .93rem; }
#flags li { margin: 4px 0; }