:root {
  --bg: #0a0c10;
  --surface: #11151b;
  --surface-2: #161b23;
  --border: #222934;
  --border-strong: #2e3744;
  --text: #e7eaf0;
  --muted: #8b96a6;
  --faint: #5c6675;

  --accent: #5b8cff;
  --accent-strong: #7aa2ff;
  --accent-ink: #0a0c10;

  --ok: #2fbf71;
  --warn: #f2a93b;
  --bad: #f05252;
  --dead: #e0457b;

  --band-ok: rgba(47, 191, 113, 0.07);
  --band-fail: rgba(240, 82, 82, 0.1);
  --band-mixed: rgba(242, 169, 59, 0.09);
  --grid: rgba(139, 150, 166, 0.14);

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 8px 30px rgba(0, 0, 0, 0.25);

  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --surface-2: #f1f3f6;
    --border: #e3e7ed;
    --border-strong: #d2d8e1;
    --text: #121722;
    --muted: #5b6676;
    --faint: #8a94a3;
    --accent: #2f62e8;
    --accent-strong: #1f4fd0;
    --accent-ink: #ffffff;
    --ok: #16924f;
    --warn: #c47a0a;
    --bad: #d63333;
    --dead: #c22a62;
    --band-ok: rgba(22, 146, 79, 0.07);
    --band-fail: rgba(214, 51, 51, 0.08);
    --band-mixed: rgba(196, 122, 10, 0.09);
    --grid: rgba(91, 102, 118, 0.15);
    --shadow: 0 1px 2px rgba(18, 23, 34, 0.04), 0 8px 24px rgba(18, 23, 34, 0.05);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px / 1.55 var(--font);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.05em 0.35em;
  border-radius: 5px;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.01em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- top bar ------------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 600;
  min-width: 0;
}
.brand span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.brand:hover {
  text-decoration: none;
}
.brand-mark {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex: none;
}
.topnav {
  display: flex;
  gap: 20px;
  font-size: 14px;
  flex: none;
}
.topnav a {
  color: var(--muted);
}
.topnav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* --- hero ---------------------------------------------------------------- */
.hero {
  padding: 56px 0 28px;
  max-width: 760px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--faint);
}
body[data-run="running"] .live-dot {
  background: var(--bad);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.3;
  }
}
h1 {
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}
.lede {
  color: var(--muted);
  font-size: 17px;
  margin: 16px 0 0;
  max-width: 680px;
}

/* --- cards --------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  padding: 18px 20px 0;
}
.card-head h2 {
  font-size: 15px;
  font-weight: 600;
}
.card-sub {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

/* --- control ------------------------------------------------------------- */
.control {
  padding: 20px;
}
.control-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 44px;
  padding: 0 20px;
  font: 600 15px var(--font);
  color: var(--accent-ink);
  background: var(--accent);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s, opacity 0.15s;
}
.btn svg {
  width: 14px;
  height: 14px;
}
.btn:hover:not(:disabled) {
  background: var(--accent-strong);
}
.btn:active:not(:disabled) {
  transform: translateY(1px);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}
.status {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  flex: 1;
  min-width: 200px;
}
.status strong {
  color: var(--text);
  font-weight: 600;
}
.clock {
  margin: 0;
  font-family: var(--mono);
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}
.clock-total {
  color: var(--faint);
  font-size: 15px;
}

.timeline {
  position: relative;
  margin-top: 22px;
  padding-bottom: 22px;
}
.timeline-track {
  display: flex;
  height: 34px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.seg {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 10px;
  min-width: 0;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-right: 1px solid var(--border);
}
.seg:last-child {
  border-right: 0;
}
.seg[data-kind="ok"] {
  background: var(--band-ok);
  color: var(--ok);
}
.seg[data-kind="fail"] {
  background: var(--band-fail);
  color: var(--bad);
}
.seg[data-kind="mixed"] {
  background: var(--band-mixed);
  color: var(--warn);
}
.seg.is-active {
  box-shadow: inset 0 -3px 0 currentColor;
}
.timeline-push {
  position: absolute;
  left: 0;
  bottom: 4px;
  height: 16px;
  border-left: 1px solid var(--faint);
  border-right: 1px solid var(--faint);
  border-bottom: 1px solid var(--faint);
  border-radius: 0 0 4px 4px;
}
.timeline-push span {
  position: absolute;
  left: 50%;
  top: 1px;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 12px;
  color: var(--faint);
  white-space: nowrap;
}
.playhead {
  position: absolute;
  top: -4px;
  height: 42px;
  width: 2px;
  left: 0;
  background: var(--text);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.2s;
}
.playhead::before {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text);
}
body[data-run="running"] .playhead,
body[data-run="finished"] .playhead {
  opacity: 1;
}

.phase-now {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 4px;
}
.phase-now p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.phase-chip {
  flex: none;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.phase-chip[data-kind="ok"] {
  color: var(--ok);
  border-color: color-mix(in srgb, var(--ok) 35%, transparent);
}
.phase-chip[data-kind="fail"] {
  color: var(--bad);
  border-color: color-mix(in srgb, var(--bad) 35%, transparent);
}
.phase-chip[data-kind="mixed"] {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 35%, transparent);
}

/* --- KPIs ---------------------------------------------------------------- */
.kpis {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.kpi h3 {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--muted);
}
.kpi-value {
  margin: 6px 0 0;
  font: 600 30px / 1.1 var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.kpi-value small {
  font-size: 14px;
  color: var(--faint);
  font-weight: 500;
  margin-left: 4px;
}
.kpi-sub {
  margin: 6px 0 0;
  font-size: 12.5px;
  color: var(--faint);
}
.kpi-delivered .kpi-value {
  color: var(--ok);
}
.kpi-pending .kpi-value {
  color: var(--warn);
}
.kpi-dead .kpi-value {
  color: var(--dead);
}
.meter {
  height: 4px;
  background: var(--surface-2);
  border-radius: 4px;
  margin-top: 12px;
  overflow: hidden;
}
.meter span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--ok);
  border-radius: 4px;
  transition: width 0.6s ease;
}

.kpi-breaker {
  transition: border-color 0.3s, background 0.3s;
}
.breaker-value {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
}
.breaker-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ok);
  flex: none;
}
.kpi-breaker[data-state="open"] {
  border-color: color-mix(in srgb, var(--bad) 55%, transparent);
  background: color-mix(in srgb, var(--bad) 8%, var(--surface));
}
.kpi-breaker[data-state="open"] .breaker-dot {
  background: var(--bad);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--bad) 25%, transparent);
  animation: pulse 1s ease-in-out infinite;
}
.kpi-breaker[data-state="open"] .breaker-value {
  color: var(--bad);
}
.kpi-breaker[data-state="half_open"] {
  border-color: color-mix(in srgb, var(--warn) 55%, transparent);
}
.kpi-breaker[data-state="half_open"] .breaker-dot {
  background: var(--warn);
}
.kpi-breaker[data-state="half_open"] .breaker-value {
  color: var(--warn);
}

/* --- chart --------------------------------------------------------------- */
.legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 2px 0 0;
  padding: 0;
  font-size: 12.5px;
  color: var(--muted);
}
.legend li,
.codes-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
}
.sw-delivered {
  background: var(--ok);
}
.sw-pending {
  background: var(--warn);
}
.sw-dead {
  background: var(--dead);
}
.sw-breaker,
.sw-fail {
  background: var(--bad);
}

.chart-wrap {
  position: relative;
  padding: 8px 12px 14px;
}
.chart {
  display: block;
  width: 100%;
  height: 340px;
  overflow: visible;
}
.chart text {
  font-family: var(--mono);
  font-size: 11px;
  fill: var(--faint);
}
.chart .grid {
  stroke: var(--grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.chart .band-ok {
  fill: var(--band-ok);
}
.chart .band-fail {
  fill: var(--band-fail);
}
.chart .band-mixed {
  fill: var(--band-mixed);
}
.chart .line {
  fill: none;
  stroke-width: 2.25;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.chart .l-delivered {
  stroke: var(--ok);
}
.chart .l-pending {
  stroke: var(--warn);
}
.chart .l-dead {
  stroke: var(--dead);
}
.chart .area-delivered {
  fill: color-mix(in srgb, var(--ok) 10%, transparent);
}
.chart .lane-bg {
  fill: var(--surface-2);
}
.chart .lane-open {
  fill: var(--bad);
}
.chart .lane-half {
  fill: var(--warn);
}
.chart .lane-closed {
  fill: color-mix(in srgb, var(--ok) 45%, transparent);
}
.chart .now {
  stroke: var(--text);
  stroke-width: 1;
  stroke-dasharray: 3 3;
  vector-effect: non-scaling-stroke;
  opacity: 0.5;
}
.chart .dot {
  fill: var(--surface);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}
.chart .hover-line {
  stroke: var(--muted);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.chart-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
}
.chart-empty[hidden] {
  display: none;
}
.chart-tip {
  position: absolute;
  pointer-events: none;
  z-index: 2;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font: 12px / 1.5 var(--mono);
  box-shadow: var(--shadow);
  min-width: 150px;
}
.chart-tip b {
  font-weight: 600;
}
.chart-tip .t {
  color: var(--muted);
  margin-bottom: 2px;
}
.chart-tip .c-delivered {
  color: var(--ok);
}
.chart-tip .c-pending {
  color: var(--warn);
}
.chart-tip .c-dead {
  color: var(--dead);
}
.chart-tip .row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

/* --- split: log + receiver ---------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.log-scroll {
  position: relative;
  max-height: 420px;
  overflow: auto;
  margin-top: 12px;
  border-top: 1px solid var(--border);
}
.log {
  width: 100%;
  border-collapse: collapse;
  font: 12.5px / 1.4 var(--mono);
  font-variant-numeric: tabular-nums;
}
.log th {
  position: sticky;
  top: 0;
  background: var(--surface);
  text-align: left;
  font-weight: 500;
  color: var(--faint);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.log td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.log td:first-child,
.log th:first-child {
  padding-left: 20px;
}
.log td.dim {
  color: var(--muted);
}
.log tr.is-new {
  animation: flash 1.2s ease-out;
}
@keyframes flash {
  from {
    background: color-mix(in srgb, var(--accent) 14%, transparent);
  }
}
.pill {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 5px;
  font-weight: 600;
  font-size: 11.5px;
}
.pill-2xx {
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 13%, transparent);
}
.pill-5xx {
  color: var(--bad);
  background: color-mix(in srgb, var(--bad) 13%, transparent);
}
.pill-4xx {
  color: var(--dead);
  background: color-mix(in srgb, var(--dead) 13%, transparent);
}
.pill-err {
  color: var(--warn);
  background: color-mix(in srgb, var(--warn) 13%, transparent);
}
.outcome-delivered {
  color: var(--ok);
}
.outcome-retry {
  color: var(--warn);
}
.outcome-dead {
  color: var(--dead);
}
.log-empty {
  margin: 0;
  padding: 28px 20px;
  color: var(--muted);
  font-size: 14px;
}
.log-empty[hidden] {
  display: none;
}

.receiver {
  display: flex;
  flex-direction: column;
}
.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 16px 20px 0;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.stats div {
  background: var(--surface);
  padding: 12px 14px;
}
.stats dt {
  font-size: 12px;
  color: var(--muted);
}
.stats dd {
  margin: 4px 0 0;
  font: 600 20px var(--mono);
  font-variant-numeric: tabular-nums;
}
.codes {
  margin: 18px 20px 0;
}
.codes-bar {
  display: flex;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  background: var(--surface-2);
}
.codes-bar span {
  height: 100%;
  transition: width 0.5s ease;
}
.codes-legend {
  list-style: none;
  display: flex;
  gap: 16px;
  padding: 0;
  margin: 10px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}
.codes-legend b {
  color: var(--text);
  font-family: var(--mono);
  font-weight: 600;
}
.note {
  margin: auto 20px 20px;
  padding-top: 18px;
  font-size: 13px;
  color: var(--muted);
}

/* --- how it works ------------------------------------------------------- */
.how {
  padding: 64px 0 24px;
}
.how h2 {
  font-size: 24px;
  letter-spacing: -0.02em;
}
.flow {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin: 18px 0 24px;
  font-family: var(--mono);
  font-size: 13px;
}
.flow li {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  white-space: nowrap;
}
.flow li small {
  color: var(--faint);
  margin-left: 4px;
}
.flow li:not(:last-child) {
  margin-right: 22px;
  position: relative;
}
.flow li:not(:last-child)::after {
  content: "→";
  color: var(--faint);
  position: absolute;
  right: -19px;
  top: 50%;
  transform: translateY(-50%);
}
.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.how-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
}
.how-card h3 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.how-card p {
  color: var(--muted);
  font-size: 14px;
  margin: 8px 0 14px;
}
.how-card a {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 12.5px;
}
.how-card a::after {
  content: " ↗";
}
.num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font: 600 12px var(--mono);
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 24px 0 40px;
  color: var(--faint);
  font-size: 13px;
}
.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer p {
  margin: 0;
}

/* --- responsive --------------------------------------------------------- */
@media (max-width: 1000px) {
  .kpis {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .split {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 640px) {
  .wrap {
    padding: 0 16px;
  }
  .topnav a:first-child {
    display: none;
  }
  .hero {
    padding: 36px 0 20px;
  }
  .lede {
    font-size: 15.5px;
  }
  .kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .kpi-breaker {
    grid-column: span 2;
  }
  .kpi-value {
    font-size: 24px;
  }
  .chart {
    height: 260px;
  }
  .seg {
    font-size: 0;
    padding: 0;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .clock {
    margin-left: auto;
  }
  .phase-now {
    flex-direction: column;
    gap: 6px;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .log th:nth-child(3),
  .log td:nth-child(3),
  .log th:nth-child(5),
  .log td:nth-child(5) {
    display: none;
  }
  .log td,
  .log th {
    padding-left: 8px;
    padding-right: 8px;
  }
}

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