/* Geist / Geist Mono — self-hosted (SIL OFL 1.1, see fonts/OFL.txt) so the
   page has no external dependency and works offline. */
@font-face {
  font-family: "Geist";
  src: url("fonts/Geist.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("fonts/GeistMono.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: light;

  --plane: #f9f9f7;
  --surface: #fcfcfb;
  --sunken: #f2f1ed;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --ink-muted: #898781;
  --rule: rgba(11, 11, 11, 0.09);
  --rule-strong: #d9d8d1;
  --grid: #e6e5de;

  --accent: #2a78d6; /* chart series + links; validated against the chart surface */
  --accent-deep: #1c5cab; /* filled controls, where white text needs the contrast */
  --accent-wash: rgba(42, 120, 214, 0.07);
  --good: #0ca30c;
  --critical: #d03b3b;

  --sans: "Geist", system-ui, -apple-system, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r-sm: 5px;
  --r-md: 7px;
  --r-lg: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --plane: #0c0c0b;
    --surface: #161615;
    --sunken: #111110;
    --ink: #f7f7f5;
    --ink-2: #b4b3ab;
    --ink-muted: #82817a;
    --rule: rgba(255, 255, 255, 0.10);
    --rule-strong: #34342f;
    --grid: #262624;

    --accent: #3987e5;
    --accent-deep: #3987e5;
    --accent-wash: rgba(57, 135, 229, 0.13);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 0 28px; }

@media (max-width: 700px) {
  .wrap { padding: 0 18px; }
}

/* ============================ masthead ============================ */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.masthead .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 15px;
  padding-bottom: 15px;
}

.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }

.brand h1 {
  margin: 0;
  font-size: 15px;
  font-weight: 560;
  letter-spacing: -0.014em;
  white-space: nowrap;
}

.tag {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-muted);
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  padding: 2px 8px 1px;
  white-space: nowrap;
}

.masthead-right { display: flex; align-items: center; gap: 16px; }

/* "live" pulse, shown only while auto-send is running */
.live {
  display: none;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
}
.live.on { display: inline-flex; }
.live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--good);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.28; }
}

.source-link {
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.source-link:hover { color: var(--ink); }
.source-link svg { width: 14px; height: 14px; }

/* ============================ intro ============================ */

.intro {
  margin: 34px 0 26px;
  max-width: 62ch;
}

.intro h2 {
  margin: 0 0 8px;
  font-size: 25px;
  font-weight: 560;
  letter-spacing: -0.028em;
  line-height: 1.22;
}

.intro p { margin: 0; font-size: 14.5px; color: var(--ink-2); }
.intro a { color: var(--accent); text-decoration: none; }
.intro a:hover { text-decoration: underline; }

/* ============================ segmented control ============================ */

.picker { margin-bottom: 16px; }

.segmented {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--sunken);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}
.segmented::-webkit-scrollbar { display: none; }

.segmented button {
  appearance: none;
  border: 1px solid transparent;
  background: none;
  border-radius: var(--r-sm);
  padding: 6px 13px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 480;
  color: var(--ink-2);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.14s ease, color 0.14s ease;
}
.segmented button:hover { color: var(--ink); }

.segmented button[aria-selected="true"] {
  background: var(--surface);
  border-color: var(--rule-strong);
  color: var(--ink);
  font-weight: 540;
  box-shadow: 0 1px 2px rgba(11, 11, 11, 0.05);
}
.segmented button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ============================ params ============================ */

.params {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.param {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-md);
  padding: 5px 10px 5px 12px;
  height: 34px;
}
.param.hidden { display: none; }

.param > span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-muted);
  white-space: nowrap;
}

.param input {
  width: 52px;
  border: none;
  background: none;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  padding: 0;
  text-align: right;
  -moz-appearance: textfield;
}
.param input::-webkit-outer-spin-button,
.param input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.param input:focus { outline: none; }
.param:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }

.param.text input { width: 106px; text-align: left; font-family: var(--sans); }

/* ============================ buttons ============================ */

.btn {
  appearance: none;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-md);
  padding: 0 14px;
  height: 34px;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.14s ease, border-color 0.14s ease;
}
.btn:hover { background: var(--sunken); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn:active { transform: translateY(0.5px); }

.btn-primary {
  color: #fff;
  background: var(--accent-deep);
  border-color: transparent;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent-deep) 88%, #000); }

.btn-quiet {
  background: none;
  border-color: transparent;
  color: var(--ink-2);
  padding: 0 8px;
}
.btn-quiet:hover { background: var(--sunken); color: var(--ink); }

/* ============================ chart ============================ */

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.card-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px 12px;
  flex-wrap: wrap;
}

.card-head h3 {
  margin: 0;
  font-size: 13.5px;
  font-weight: 560;
  letter-spacing: -0.008em;
}
.card-head p { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-muted); }

/* inline readouts — replaces the usual row of big stat tiles */
.readout {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.readout div { display: flex; align-items: baseline; gap: 5px; }
.readout b {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 560;
  letter-spacing: -0.01em;
}
.readout span { font-size: 12px; color: var(--ink-muted); }
.readout .mark { width: 2px; height: 10px; border-radius: 1px; align-self: center; }
.readout .mark.up { background: var(--good); }
.readout .mark.down { background: var(--critical); }

.canvas-shell { position: relative; padding: 0 18px; }
#chart { display: block; width: 100%; height: 252px; }

.tooltip {
  position: absolute;
  pointer-events: none;
  z-index: 5;
  min-width: 126px;
  padding: 7px 9px;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-sm);
  box-shadow: 0 6px 20px rgba(11, 11, 11, 0.11);
  font-size: 12px;
  line-height: 1.45;
  opacity: 0;
  transition: opacity 0.1s ease;
}
.tooltip.visible { opacity: 1; }
.tooltip .tt-time { font-family: var(--mono); font-size: 10.5px; color: var(--ink-muted); }
.tooltip .tt-row { display: flex; align-items: center; gap: 6px; margin-top: 2px; }
.tooltip .tt-val { font-family: var(--mono); font-weight: 560; margin-left: auto; }

.card-foot {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 18px 14px;
  border-top: 1px solid var(--rule);
  margin-top: 8px;
  font-size: 12px;
  color: var(--ink-2);
}
.card-foot span { display: inline-flex; align-items: center; gap: 7px; }

.swatch { display: inline-block; flex-shrink: 0; }
.swatch.line { width: 13px; height: 2px; border-radius: 1px; background: var(--accent); }

/* Allowed vs rejected read by direction as well as hue — green/red alone is
   not separable with red-green colour blindness. */
.swatch.up,
.swatch.down {
  position: relative;
  width: 11px;
  height: 13px;
  border-bottom: 1px solid var(--rule-strong);
}
.swatch.down { border-bottom: none; border-top: 1px solid var(--rule-strong); }
.swatch.up::after,
.swatch.down::after {
  content: "";
  position: absolute;
  left: 4px;
  width: 2px;
  height: 8px;
  border-radius: 1px;
}
.swatch.up::after { top: 0; background: var(--good); }
.swatch.down::after { bottom: 0; background: var(--critical); }

/* ============================ traffic actions ============================ */

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0 0;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-md);
  height: 34px;
  padding: 0 12px;
  font-size: 13.5px;
  color: var(--ink-2);
}
.switch input[type="checkbox"] { width: 14px; height: 14px; margin: 0; accent-color: var(--accent-deep); }
.switch input[type="range"] { width: 96px; accent-color: var(--accent-deep); }
.switch .rate { font-family: var(--mono); font-size: 12px; color: var(--ink); min-width: 34px; }

/* ============================ request log ============================ */

.log { margin-top: 24px; }
/* pull the quiet button's inset padding back so its text aligns with the column */
.log > .btn-quiet { margin-left: -8px; }

.log-table {
  width: 100%;
  margin-top: 12px;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
}
.log-table caption {
  text-align: left;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-muted);
  padding-bottom: 8px;
}
.log-table th,
.log-table td { text-align: left; padding: 6px 14px 6px 0; border-bottom: 1px solid var(--rule); }
.log-table th {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--ink-muted);
  position: sticky;
  top: 0;
  background: var(--plane);
}
.log-table td.allowed { color: var(--good); }
.log-table td.rejected { color: var(--critical); }
.log-scroll { max-height: 264px; overflow-y: auto; }

/* ============================ reference ============================ */

.reference { margin: 44px 0 72px; }

.reference h3 {
  margin: 0 0 3px;
  font-size: 13.5px;
  font-weight: 560;
}
.reference > p { margin: 0 0 4px; font-size: 13px; color: var(--ink-muted); }

.ref-row {
  display: grid;
  grid-template-columns: 190px 150px 1fr;
  gap: 18px;
  align-items: start;
  padding: 15px 0 15px 14px;
  border-bottom: 1px solid var(--rule);
  border-left: 2px solid transparent;
}
.ref-row[data-active="true"] { border-left-color: var(--accent); }

.ref-row h4 {
  margin: 0;
  font-size: 13.5px;
  font-weight: 540;
  letter-spacing: -0.008em;
}
.ref-row .meta { font-family: var(--mono); font-size: 11.5px; color: var(--ink-muted); }
.ref-row .meta i { font-style: normal; color: var(--ink-2); }
.ref-row p { margin: 0; font-size: 13px; color: var(--ink-2); }

@media (max-width: 760px) {
  .ref-row { grid-template-columns: 1fr; gap: 5px; }
}

/* ============================ misc ============================ */

.error { margin: 12px 0 0; font-size: 13px; color: var(--critical); min-height: 1em; }

.snippet {
  margin: 0;
  padding: 12px 14px;
  background: var(--sunken);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-2);
  overflow-x: auto;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}