: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: #7c3aed;
  --orange: #d97706;
  --green: #087154;
  --teal: #0f8a8a;
}

* {
  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;
}

.unique-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));
}

.unique-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(1.65rem, 3.65vw, 3.2rem);
  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;
}

.unique-visualizer,
.unique-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%);
}

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

.unique-board {
  display: block;
  width: 100%;
  max-height: min(63dvh, 710px);
  border-radius: 20px;
  touch-action: manipulation;
}

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

.base-line {
  stroke: #334155;
  stroke-linecap: round;
  stroke-width: 9;
}

.construction-arc {
  fill: none;
  stroke-linecap: round;
  stroke-width: 7;
}

.arc-a {
  stroke: var(--violet);
  stroke-dasharray: 15 10;
}

.arc-b {
  stroke: var(--teal);
  stroke-dasharray: 7 11;
}

.sss-triangle,
.ambiguity-triangle {
  stroke-linejoin: round;
  stroke-width: 8;
}

.upper-triangle {
  fill: rgb(37 99 235 / 13%);
  stroke: var(--blue);
}

.lower-triangle {
  fill: rgb(217 119 6 / 7%);
  stroke: var(--orange);
  stroke-dasharray: 17 11;
  opacity: 0.58;
}

.unique-board[data-state="comparing"] .lower-triangle {
  opacity: 0.82;
}

.unique-board[data-state="overlay"] .lower-triangle {
  fill: transparent;
  opacity: 0.92;
}

.intersection-dot {
  fill: white;
  stroke-width: 7;
}

.upper-dot,
.near-dot {
  stroke: var(--blue);
}

.lower-dot {
  stroke: var(--orange);
}

.far-dot {
  stroke: var(--violet);
}

.vertex-dot {
  fill: var(--ink);
  stroke: white;
  stroke-width: 6;
}

.side-mark {
  stroke-linecap: round;
  stroke-width: 8;
}

.base-mark {
  stroke: #334155;
}

.slanted-mark {
  stroke: var(--green);
}

.point-label,
.case-label,
.summary-heading,
.summary-result {
  paint-order: stroke;
  stroke: #f8fafc;
  stroke-linejoin: round;
  font-weight: 900;
}

.point-label {
  fill: var(--ink);
  stroke-width: 12px;
  font-size: 38px;
  text-anchor: middle;
}

.intersection-label {
  fill: #5b3bb5;
}

.case-label {
  fill: var(--green);
  stroke-width: 10px;
  font-size: 34px;
  letter-spacing: 0.08em;
}

.is-building .construction-arc,
.is-building .sss-triangle,
.is-building .intersection-dot,
.is-building .side-mark {
  animation: calm-build 680ms ease-out both;
}

.is-building .arc-b,
.is-building .lower-triangle,
.is-building .lower-dot {
  animation-delay: 170ms;
}

.is-building .case-label {
  animation: reveal-label 360ms 900ms ease-out both;
}

@keyframes calm-build {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes reveal-label {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.given-circle {
  fill: none;
  stroke: var(--teal);
  stroke-width: 7;
  stroke-dasharray: 13 10;
}

.angle-ray {
  stroke: var(--orange);
  stroke-linecap: round;
  stroke-width: 8;
}

.angle-arc {
  fill: none;
  stroke: var(--orange);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 8;
}

.near-triangle {
  fill: rgb(37 99 235 / 12%);
  stroke: var(--blue);
}

.far-triangle {
  fill: rgb(124 58 237 / 8%);
  stroke: var(--violet);
  stroke-dasharray: 18 11;
}

.ambiguity-mark {
  stroke: var(--green);
}

.summary-group {
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

.unique-board[data-state="summary"] .summary-group {
  opacity: 1;
}

.summary-card {
  fill: rgb(255 255 255 / 96%);
  stroke: #cbd5e1;
  stroke-width: 4;
}

.summary-heading {
  fill: var(--muted);
  stroke-width: 8px;
  font-size: 26px;
}

.summary-result {
  fill: var(--green);
  stroke-width: 9px;
  font-size: 31px;
}

.summary-result-two {
  fill: var(--violet);
  font-size: 27px;
}

.summary-divider {
  stroke: #dbe4ef;
  stroke-width: 3;
}

.unique-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;
}

.unique-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) {
  .unique-shell {
    padding-inline: 12px;
  }

  .unique-header {
    display: block;
  }

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

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

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

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

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

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

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

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

  .eyebrow {
    margin-bottom: 2px;
  }

  h1 {
    font-size: clamp(1.45rem, 3.1vw, 2.55rem);
  }

  .subtitle {
    margin-top: 3px;
  }

  .unique-board {
    max-height: 57dvh;
  }

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

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

  .unique-board {
    max-height: 720px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .is-building .construction-arc,
  .is-building .sss-triangle,
  .is-building .intersection-dot,
  .is-building .side-mark,
  .is-building .case-label {
    animation: none;
  }

  .summary-group {
    transition: none;
  }
}