:root {
  color-scheme: light dark;
  --bg: light-dark(#f4f6fa, #0d1118);
  --surface: light-dark(#ffffff, #161c25);
  --surface-strong: light-dark(#eef5ff, #14243a);
  --text: light-dark(#172033, #edf3ff);
  --muted: light-dark(#687187, #9da9bd);
  --border: light-dark(#dce2ec, #2c3544);
  --grid: light-dark(#e8edf4, #242d3b);
  --primary: light-dark(#1f6feb, #58a6ff);
  --primary-soft: light-dark(#dbeafe, #17365f);
  --secondary: light-dark(#ea7b31, #ff9c5a);
  --good: light-dark(#137a4e, #42d392);
  --warn: light-dark(#a35c00, #ffc266);
  --danger: light-dark(#b42318, #ff7b72);
  --shadow: 0 18px 45px light-dark(rgb(34 49 78 / 9%), rgb(0 0 0 / 28%));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
}

.access-gate {
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  place-items: center;
  padding: 24px;
}

.access-card {
  width: min(100%, 520px);
  padding: clamp(24px, 6vw, 42px);
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.access-card .eyebrow {
  margin-bottom: 12px;
}

.access-card h1 {
  font-size: clamp(1.8rem, 7vw, 2.8rem);
}

.access-card .lede {
  margin: 0 auto;
}

.access-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  padding: 0 20px;
  border-radius: 11px;
  background: var(--primary);
  color: light-dark(#ffffff, #08111f);
  font-weight: 700;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button,
input[type="range"] {
  cursor: pointer;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 30px;
}

.page-header,
.section-heading,
.boundary-head,
footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  letter-spacing: -0.025em;
}

.eyebrow {
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lede {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
}

.rate-chip {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.rate-chip {
  display: grid;
  gap: 2px;
  min-width: 180px;
  padding: 10px 16px;
}

.rate-chip span,
.summary-card span,
.summary-card small,
footer {
  color: var(--muted);
}

.rate-chip span {
  font-size: 0.72rem;
}

.rate-chip strong,
.summary-card strong,
.boundary-head strong,
.number-field input {
  font-variant-numeric: tabular-nums;
}

.load-panel {
  display: flex;
  align-items: end;
  gap: 12px;
  margin: 28px 0 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.load-panel label,
.boundary-control {
  display: grid;
  gap: 8px;
}

.load-panel label > span:first-child,
.boundary-head span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.input-with-suffix,
.number-field {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--bg);
}

.input-with-suffix input,
.number-field input {
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}

.input-with-suffix input {
  width: 82px;
  padding: 10px 4px 10px 12px;
}

.input-with-suffix span,
.number-field span {
  color: var(--muted);
}

.input-with-suffix > span:last-child {
  padding-right: 12px;
}

.load-panel button,
.target-control button {
  min-height: 42px;
  padding: 0 18px;
  border: 0;
  border-radius: 11px;
  background: var(--primary);
  color: light-dark(#ffffff, #08111f);
  font-weight: 700;
}

.load-panel button:disabled,
.target-control button:disabled {
  cursor: wait;
  opacity: 0.6;
}

.status {
  align-self: center;
  margin: 0 0 0 4px;
  color: var(--muted);
  font-size: 0.82rem;
}

.status.error {
  color: var(--danger);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.summary-card {
  display: grid;
  gap: 7px;
  min-height: 132px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
}

.summary-card-primary {
  background: var(--surface-strong);
}

.summary-card strong {
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

.summary-card small {
  align-self: end;
}

.router-panel {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.forecast {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.forecast.in-range strong {
  color: var(--good);
}

.forecast.out-of-range strong {
  color: var(--warn);
}

.target-control {
  display: grid;
  flex: 0 0 auto;
  gap: 7px;
  width: min(100%, 330px);
}

.target-control > label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.target-input-wrap input {
  width: 74px;
}

.target-control small {
  color: var(--muted);
  font-size: 0.72rem;
}

.target-control button {
  justify-self: start;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  margin-top: 22px;
}

.boundary-control input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

.number-field {
  width: 150px;
}

.number-field span {
  padding-left: 10px;
}

.number-field input {
  width: 100%;
  padding: 8px 10px 8px 5px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 22px 0 8px;
}

.legend-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--text);
}

.legend-button[aria-pressed="false"] {
  opacity: 0.38;
}

.legend-dot,
.legend-diamond {
  width: 10px;
  height: 10px;
  background: var(--primary);
}

.legend-dot {
  border-radius: 50%;
}

.legend-diamond {
  border-radius: 1px;
  background: var(--secondary);
  transform: rotate(45deg) scale(0.8);
}

.chart-wrap {
  position: relative;
  min-height: 520px;
}

#payment-chart {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart-frame,
.chart-axis,
.chart-grid {
  vector-effect: non-scaling-stroke;
}

.chart-frame,
.chart-axis {
  stroke: var(--border);
}

.chart-grid {
  stroke: var(--grid);
}

.chart-label,
.chart-axis-title {
  fill: var(--muted);
  font-size: 12px;
}

.chart-axis-title {
  fill: var(--text);
}

.payment-dot {
  fill: var(--primary);
  opacity: 0.76;
  stroke: var(--surface);
  stroke-width: 0.7;
  vector-effect: non-scaling-stroke;
}

.payment-dot.ip2 {
  fill: var(--secondary);
}

.payment-dot.active {
  opacity: 1;
  stroke: var(--text);
  stroke-width: 1.5;
}

.chart-hit {
  fill: transparent;
  pointer-events: all;
}

.tooltip {
  position: absolute;
  z-index: 2;
  max-width: 260px;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  pointer-events: none;
  font-size: 0.78rem;
}

.tooltip strong,
.tooltip span {
  display: block;
}

.tooltip span {
  margin-top: 3px;
  color: var(--muted);
}

footer {
  flex-wrap: wrap;
  padding: 18px 2px 0;
  font-size: 0.75rem;
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 22px, 680px);
    padding-top: 24px;
  }

  .page-header,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .rate-chip,
  .target-control {
    align-self: flex-start;
  }

  .load-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .status {
    align-self: flex-start;
    margin-left: 0;
  }

  .summary-grid,
  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .summary-card:last-child {
    grid-column: 1 / -1;
  }

  .router-panel {
    padding: 16px;
  }

  .chart-wrap {
    min-height: 450px;
  }
}

@media (max-width: 460px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .summary-card:last-child {
    grid-column: auto;
  }
}