/* CDN Testbed — instrument-panel aesthetic.
   Tokens: paper #EDF0F3 · panel #FFFFFF · ink #1B2733 · slate #5C6B7A
           signal amber #E8A13D · pass green #2E8B6E · fail red #C4453B
   Type: system sans for headings, ui-monospace for every measured value.
   No external fonts on purpose: every request must belong to the CDN test. */

:root {
  --paper: #EDF0F3;
  --panel: #FFFFFF;
  --ink: #1B2733;
  --slate: #5C6B7A;
  --line: #D5DCE3;
  --amber: #E8A13D;
  --amber-soft: #FBF0DC;
  --green: #2E8B6E;
  --red: #C4453B;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
}

/* ---------- masthead ---------- */
.masthead {
  background: var(--ink);
  color: #EDF0F3;
  border-bottom: 3px solid var(--amber);
}
.masthead-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 800;
}
.brand .sub {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #9DB0C0;
}
.edge-status {
  font-family: var(--mono);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 6px 12px;
  border-radius: 999px;
}
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--slate);
}
.dot.ok { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.bad { background: var(--red); }

/* ---------- layout ---------- */
main {
  max-width: 1100px;
  margin: 28px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.span-2 { grid-column: 1 / -1; }
@media (max-width: 820px) {
  main { grid-template-columns: 1fr; }
}

/* ---------- panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  box-shadow: 0 1px 2px rgba(27,39,51,0.05);
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.panel h2 {
  margin: 0;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.panel-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 10px; }
.hint { color: var(--slate); font-size: 0.85rem; margin: 6px 0 12px; }
.hint code, .checks code { font-family: var(--mono); font-size: 0.8em; background: var(--paper); padding: 1px 5px; border-radius: 4px; }
.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--slate);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
}
.empty { color: var(--slate); font-size: 0.85rem; }

/* ---------- controls ---------- */
.btn {
  font: inherit;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 7px;
  padding: 7px 16px;
  cursor: pointer;
}
.btn.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
  font-weight: 600;
}
.btn.primary:hover { background: #2A3B4D; }
.btn:focus-visible, .input:focus-visible, .select:focus-visible, .toggle input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.btn[disabled] { opacity: 0.55; cursor: wait; }
.toggle { font-size: 0.82rem; color: var(--slate); display: inline-flex; gap: 6px; align-items: center; }
.select, .input {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.82rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 7px 10px;
  background: var(--panel);
  color: var(--ink);
}
.inline-form { display: flex; gap: 8px; }
.inline-form .input { flex: 1; min-width: 0; }

/* ---------- waterfall (signature element) ---------- */
.waterfall { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.wf-row {
  display: grid;
  grid-template-columns: 220px 1fr 130px;
  gap: 12px;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.75rem;
}
@media (max-width: 640px) {
  .wf-row { grid-template-columns: 1fr; gap: 3px; }
}
.wf-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wf-name .badge {
  display: inline-block;
  font-size: 0.62rem;
  padding: 0 5px;
  border-radius: 3px;
  margin-left: 6px;
  background: var(--amber-soft);
  color: #8A5E17;
}
.wf-name .badge.mem { background: #E2EFE9; color: var(--green); }
.wf-track {
  position: relative;
  height: 14px;
  background: var(--paper);
  border-radius: 3px;
  overflow: hidden;
}
.wf-ttfb, .wf-dl {
  position: absolute;
  top: 0; bottom: 0;
  min-width: 1px;
  transition: width 0.4s ease, left 0.4s ease;
}
.wf-ttfb { background: var(--amber); }
.wf-dl { background: var(--ink); }
.wf-figs { text-align: right; color: var(--slate); white-space: nowrap; }
.wf-figs strong { color: var(--ink); }

/* ---------- throughput ---------- */
.tp-readout { margin: 10px 0 4px; }
.tp-figure {
  font-family: var(--mono);
  display: flex;
  align-items: baseline;
  gap: 8px;
}
#tp-value { font-size: 2.6rem; font-weight: 700; letter-spacing: -0.02em; }
.tp-unit { color: var(--slate); font-size: 0.85rem; }
.tp-meta { font-family: var(--mono); font-size: 0.75rem; color: var(--slate); margin: 2px 0 8px; }
.tp-bar {
  height: 8px;
  background: var(--paper);
  border-radius: 4px;
  overflow: hidden;
}
.tp-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--amber);
  transition: width 0.15s linear;
}

/* ---------- cache checks ---------- */
.checks {
  list-style: none;
  padding: 0;
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 0.8rem;
}
.checks li { padding: 5px 0 5px 22px; position: relative; }
.checks li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--line);
}
.checks li.pass::before { background: var(--green); }
.checks li.fail::before { background: var(--red); }
.checks li.pass { color: var(--green); }
.checks li.fail { color: var(--red); }
.checks li.pending { color: var(--slate); }

/* ---------- mono output blocks ---------- */
.mono-out {
  font-family: var(--mono);
  font-size: 0.74rem;
  background: var(--ink);
  color: #D8E2EB;
  border-radius: 7px;
  padding: 12px 14px;
  margin: 8px 0 0;
  min-height: 20px;
  max-height: 260px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.mono-out:empty { display: none; }
.mono-out .hl { color: var(--amber); }

/* ---------- catalog ---------- */
.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}
.card h3 { margin: 0 0 2px; font-size: 0.85rem; }
.card .sku { font-family: var(--mono); font-size: 0.68rem; color: var(--slate); }
.card .price { font-family: var(--mono); font-weight: 700; margin-top: 6px; }
.card .stock { font-size: 0.72rem; color: var(--green); }
.card .stock.low { color: var(--red); }

/* ---------- gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 10px;
}
.gallery figure { margin: 0; }
.gallery img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.gallery figcaption {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--slate);
  margin-top: 5px;
}

/* ---------- footer ---------- */
footer {
  max-width: 1100px;
  margin: 10px auto 40px;
  padding: 0 24px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.72rem;
}

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