:root {
  color-scheme: light;
  font-family:
    ui-rounded, "SF Pro Rounded", "Avenir Next", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --ink: #172033;
  --muted: #64748b;
  --blue: #2563eb;
  --violet: #7654c4;
  --green: #087154;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 9% 5%, rgb(37 99 235 / 7%), transparent 28rem),
    #f6f7fb;
  overscroll-behavior: none;
}

button,
svg {
  -webkit-tap-highlight-color: transparent;
}

.number-shell {
  width: min(100%, 1380px);
  margin: 0 auto;
  padding:
    max(18px, env(safe-area-inset-top))
    max(18px, env(safe-area-inset-right))
    max(18px, env(safe-area-inset-bottom))
    max(18px, env(safe-area-inset-left));
}

.number-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--blue);
  font-size: clamp(0.82rem, 1.5vw, 1rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 1100px;
  margin: 0;
  font-size: clamp(1.7rem, 3.8vw, 3.35rem);
  line-height: 1.03;
  letter-spacing: -0.035em;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-weight: 650;
}

.local-note {
  flex: 0 0 auto;
  margin: 4px 0 0;
  padding: 9px 14px;
  border: 1px solid #b9e5d5;
  border-radius: 999px;
  color: var(--green);
  background: #ecfdf5;
  font-size: clamp(0.74rem, 1.2vw, 0.9rem);
  font-weight: 750;
  white-space: nowrap;
}

.local-note span {
  margin-right: 5px;
  font-size: 0.7em;
}

.number-visualizer,
.number-insight {
  border: 1px solid rgb(203 213 225 / 82%);
  border-radius: 26px;
  background: rgb(255 255 255 / 94%);
  box-shadow: 0 20px 60px rgb(30 41 59 / 9%);
}

.number-visualizer {
  min-width: 0;
  padding: clamp(8px, 1.4vw, 16px);
}

.number-board {
  display: block;
  width: 100%;
  max-height: min(57dvh, 610px);
  border-radius: 20px;
  touch-action: none;
  user-select: none;
}

.board-background {
  fill: #f8fafc;
  stroke: #dbe4ef;
  stroke-width: 4;
}

.number-axis-arrow {
  fill: #64748b;
}

.number-axis {
  stroke: #64748b;
  stroke-linecap: butt;
  stroke-width: 7;
}

.number-tick line {
  stroke-linecap: round;
  stroke-width: 7;
}

.number-tick text {
  paint-order: stroke;
  stroke: #f8fafc;
  stroke-linejoin: round;
  stroke-width: 11px;
  font-size: 42px;
  font-weight: 900;
  text-anchor: middle;
}

.zero-tick line {
  stroke: #334155;
}

.zero-tick text {
  fill: #334155;
}

.positive-tick line {
  stroke: rgb(37 99 235 / 72%);
}

.positive-tick text {
  fill: var(--blue);
}

.negative-tick line {
  stroke: rgb(118 84 196 / 76%);
}

.negative-tick text {
  fill: var(--violet);
}

.number-point-control {
  transform-box: fill-box;
  transform-origin: center;
}

.point-halo {
  fill: rgb(37 99 235 / 12%);
  stroke: rgb(37 99 235 / 22%);
  stroke-width: 4;
}

.number-point {
  fill: var(--blue);
  stroke: white;
  stroke-width: 8;
  filter: drop-shadow(0 7px 10px rgb(37 99 235 / 28%));
}

.number-board[data-value-sign="negative"] .point-halo {
  fill: rgb(118 84 196 / 13%);
  stroke: rgb(118 84 196 / 24%);
}

.number-board[data-value-sign="negative"] .number-point {
  fill: var(--violet);
  filter: drop-shadow(0 7px 10px rgb(118 84 196 / 28%));
}

.number-board[data-value-sign="zero"] .point-halo {
  fill: rgb(51 65 85 / 11%);
  stroke: rgb(51 65 85 / 20%);
}

.number-board[data-value-sign="zero"] .number-point {
  fill: #334155;
  filter: drop-shadow(0 7px 10px rgb(51 65 85 / 24%));
}

.number-point-handle {
  fill: transparent;
  stroke: transparent;
  cursor: default;
  touch-action: none;
}

.number-board[data-state="free"] .number-point-handle {
  cursor: grab;
}

.number-board[data-state="free"] .number-point-handle:active {
  cursor: grabbing;
}

.number-point-handle:focus-visible {
  fill: rgb(37 99 235 / 7%);
  stroke: rgb(37 99 235 / 40%);
  stroke-width: 6;
}

.current-value rect,
.current-value path {
  fill: #172033;
}

.current-value text {
  fill: white;
  font-size: 39px;
  font-weight: 900;
  text-anchor: middle;
}

.number-insight {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px 24px;
  margin-top: 14px;
  padding: clamp(16px, 2vw, 24px);
  align-items: center;
}

.insight-text {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  font-weight: 780;
  line-height: 1.35;
}

.number-controls {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.primary-button,
.reset-button {
  min-height: 56px;
  padding: 0 20px;
  border-radius: 16px;
  font: inherit;
  font-size: clamp(0.95rem, 1.5vw, 1.08rem);
  font-weight: 850;
  touch-action: manipulation;
}

.primary-button {
  border: 2px solid var(--blue);
  color: white;
  background: var(--blue);
  box-shadow: 0 10px 24px rgb(37 99 235 / 20%);
}

.reset-button {
  border: 2px solid #cbd5e1;
  color: var(--ink);
  background: white;
}

.primary-button:disabled,
.reset-button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.primary-button:focus-visible,
.reset-button:focus-visible {
  outline: 5px solid rgb(37 99 235 / 26%);
  outline-offset: 3px;
}

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

noscript {
  display: block;
  margin-top: 14px;
  color: #a6384d;
  font-weight: 700;
}

@media (max-width: 760px) {
  .number-shell {
    padding-inline: 12px;
  }

  .number-header {
    display: block;
  }

  .local-note {
    display: inline-block;
    margin-top: 12px;
  }

  .number-insight {
    grid-template-columns: 1fr;
  }

  .number-controls {
    justify-content: stretch;
  }

  .primary-button,
  .reset-button {
    flex: 1 1 0;
  }
}

@media (max-width: 520px) {
  .number-controls {
    flex-direction: column;
  }

  .primary-button,
  .reset-button {
    width: 100%;
  }
}

@media (orientation: landscape) and (max-height: 820px) {
  .number-shell {
    padding-block: 10px;
  }

  .number-header {
    margin-bottom: 9px;
  }

  h1 {
    font-size: clamp(1.5rem, 3.2vw, 2.65rem);
  }

  .subtitle {
    margin-top: 3px;
  }

  .number-board {
    max-height: 52dvh;
  }

  .number-insight {
    margin-top: 9px;
    padding-block: 12px;
  }
}

@media (min-width: 1500px) {
  .number-shell {
    width: min(94vw, 1600px);
  }

  .number-board {
    max-height: 640px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .number-point,
  .point-halo {
    filter: none;
  }
}