:root {
  --grid-size: 15;
  --cell-size: min(5vw, 36px);

  --bg: #f2f2f7;
  --surface: rgba(255,255,255,0.88);
  --separator: rgba(60,60,67,0.18);
  --label: #000;
  --secondary-label: rgba(60,60,67,0.68);

  --blue: #007aff;
  --cyan: #32ade6;
  --indigo: #5856d6;
  --green: #30d158;
  --red: #ff453a;
  --gold: #ffd60a;

  --wall: #1c2b4f;
  --path: #fff;
  --start: #e8f8ef;
  --end: #ffecef;
  --visited: #dcebff;
  --frontier: #9cddff;
  --current: #4cb8ff;
  --solution: #ffd60a;

  --shadow: 0 8px 28px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--label);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button, select { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.app-shell {
  max-width: 1360px;
  margin: 0 auto;
  padding:
    max(16px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-icon {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}

.app-title {
  font-size: 28px;
  line-height: 1.05;
  font-weight: 750;
  letter-spacing: -0.025em;
}

.app-subtitle {
  margin-top: 4px;
  color: var(--secondary-label);
  font-size: 14px;
  line-height: 1.35;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 11px;
  border-radius: 999px;
  background: rgba(255,255,255,0.78);
  border: 0.5px solid var(--separator);
  color: var(--secondary-label);
  font-size: 13px;
  font-weight: 600;
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
}

.status-chip.ready { color: #248a3d; }

.status-chip svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.workspace {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.sidebar {
  display: grid;
  gap: 14px;
  position: sticky;
  top: max(16px, env(safe-area-inset-top));
}

.group-card,
.info-card,
.content-panel {
  background: var(--surface);
  border: 0.5px solid rgba(255,255,255,0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
}

.group-card,
.info-card {
  border-radius: 22px;
  overflow: hidden;
}

.group-card { padding: 14px; }

.info-card {
  padding: 16px;
  background: linear-gradient(180deg, rgba(0,122,255,0.08), rgba(88,86,214,0.055));
}

.section-label,
.phase-label {
  font-size: 12px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.035em;
  color: var(--secondary-label);
  text-transform: uppercase;
}

.section-label { margin: 0 0 10px 2px; }
.phase-label { margin-bottom: 7px; color: var(--blue); }

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding: 2px;
  border-radius: 12px;
  background: rgba(118,118,128,0.12);
}

.segment {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--secondary-label);
  border-radius: 10px;
  padding: 9px 8px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, box-shadow 160ms ease, transform 110ms ease;
}

.segment svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.segment.active {
  background: #fff;
  color: var(--label);
  box-shadow: 0 1px 4px rgba(0,0,0,0.14);
}

.segment:active { transform: scale(0.98); }

.row-control {
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 15px;
}

.row-label-icon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.row-label-icon svg {
  width: 17px;
  height: 17px;
  fill: var(--secondary-label);
}

.row-control select {
  appearance: none;
  border: 0;
  background: rgba(118,118,128,0.10);
  border-radius: 10px;
  padding: 8px 28px 8px 10px;
  color: var(--blue);
  font-weight: 650;
  text-align: right;
  outline: none;
}

.ios-button {
  appearance: none;
  border: 0;
  border-radius: 14px;
  min-height: 46px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  font-weight: 650;
  cursor: pointer;
  transition: transform 110ms ease, filter 150ms ease, background-color 150ms ease, opacity 150ms ease;
}

.ios-button svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.ios-button.primary {
  color: white;
  background: var(--blue);
  box-shadow: 0 8px 20px rgba(0,122,255,0.20);
}

.ios-button.route-button {
  margin-top: 8px;
  color: white;
  background: var(--indigo);
  box-shadow: 0 8px 20px rgba(88,86,214,0.18);
}

.ios-button.secondary {
  margin-top: 8px;
  background: rgba(118,118,128,0.10);
  color: var(--label);
}

.ios-button:active {
  transform: scale(0.985);
  filter: brightness(.95);
}

.ios-button:disabled,
.segment:disabled,
select:disabled {
  opacity: 0.42;
  cursor: default;
  transform: none !important;
  filter: none !important;
}

.list-action {
  appearance: none;
  width: calc(100% + 28px);
  margin-left: -14px;
  padding: 0 14px;
  min-height: 48px;
  border: 0;
  border-top: 0.5px solid var(--separator);
  background: transparent;
  color: var(--label);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  text-align: left;
}

.list-action:first-of-type { border-top: 0; }
.list-action:active { background: rgba(118,118,128,0.08); }

.list-action-leading {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
}

.list-action-leading svg {
  width: 18px;
  height: 18px;
  fill: var(--blue);
}

.chevron {
  font-size: 24px;
  line-height: 1;
  color: rgba(60,60,67,0.3);
}

.info-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.info-card p {
  margin: 7px 0 0;
  color: var(--secondary-label);
  font-size: 13px;
  line-height: 1.45;
}

.content-panel {
  border-radius: 26px;
  padding: 18px;
  min-width: 0;
}

.content-header {
  margin-bottom: 14px;
}

.section-title {
  font-size: 26px;
  font-weight: 760;
  letter-spacing: -0.025em;
}

.status-text {
  margin-top: 5px;
  color: var(--secondary-label);
  font-size: 14px;
  line-height: 1.35;
}

.telemetry {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.metric {
  min-height: 60px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(118,118,128,0.075);
}

.metric-label {
  color: var(--secondary-label);
  font-size: 11px;
  font-weight: 650;
}

.metric-value {
  margin-top: 3px;
  font-size: 20px;
  line-height: 1.1;
  font-weight: 760;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: 12px;
  color: var(--secondary-label);
  font-size: 12px;
  font-weight: 600;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  border: 0.5px solid rgba(60,60,67,0.18);
  display: inline-block;
}

.swatch.wall { background: var(--wall); border-color: var(--wall); }
.swatch.build { background: linear-gradient(135deg, #fff 0 28%, #60e3ff 30% 58%, #7c5cff 60% 100%); }
.swatch.start { background: var(--start); border-color: var(--green); }
.swatch.end { background: var(--end); border-color: var(--red); }
.swatch.frontier { background: var(--frontier); }
.swatch.visited { background: var(--visited); }
.swatch.solution { background: var(--solution); }

.maze-card {
  position: relative;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding: 18px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 0%, rgba(0,122,255,0.055), transparent 42%),
    rgba(255,255,255,0.82);
  border: 0.5px solid rgba(60,60,67,0.12);
}

#maze {
  display: grid;
  grid-template-columns: repeat(var(--grid-size), var(--cell-size));
  grid-template-rows: repeat(var(--grid-size), var(--cell-size));
  width: max-content;
  margin: 0 auto;
  border: 2px solid var(--wall);
  border-radius: 9px;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  background: #fff;
  isolation: isolate;
}

.cell {
  position: relative;
  width: var(--cell-size);
  height: var(--cell-size);
  background: var(--path);
  border: 0.5px solid #ececf1;
  transition:
    background-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms cubic-bezier(.2,.8,.2,1),
    opacity 140ms ease;
}

.cell.wall {
  background: var(--wall);
  border-color: var(--wall);
}

.cell.carve-trail:not(.wall) {
  animation: electricTrail 700ms ease-out both;
}

.cell.carve-spark:not(.wall) {
  z-index: 3;
  animation: electricSpark 520ms cubic-bezier(.2,.9,.2,1) both;
}

.cell.carve-head:not(.wall) {
  z-index: 4;
  animation: electricHead 700ms ease-in-out infinite alternate;
}

@keyframes electricSpark {
  0% {
    transform: scale(.54);
    background: #ffffff;
    box-shadow:
      0 0 0 0 rgba(255,255,255,.95),
      0 0 0 0 rgba(62,220,255,.78),
      0 0 0 0 rgba(105,77,255,.55);
  }
  40% {
    transform: scale(1.07);
    background: #e9fbff;
    box-shadow:
      0 0 0 2px rgba(255,255,255,.95),
      0 0 14px 5px rgba(62,220,255,.68),
      0 0 26px 8px rgba(105,77,255,.36);
  }
  100% {
    transform: scale(1);
    background: #ffffff;
    box-shadow: 0 0 0 rgba(0,0,0,0);
  }
}

@keyframes electricHead {
  from {
    background: #eefcff;
    box-shadow:
      inset 0 0 0 2px rgba(255,255,255,.95),
      0 0 9px 2px rgba(50,173,230,.58),
      0 0 18px 4px rgba(88,86,214,.24);
  }
  to {
    background: #ffffff;
    box-shadow:
      inset 0 0 0 2px rgba(255,255,255,.95),
      0 0 14px 4px rgba(50,173,230,.72),
      0 0 26px 8px rgba(88,86,214,.28);
  }
}

@keyframes electricTrail {
  0% {
    background: #dff8ff;
    box-shadow: inset 0 0 0 2px rgba(50,173,230,.28);
  }
  100% {
    background: #ffffff;
    box-shadow: inset 0 0 0 0 rgba(0,0,0,0);
  }
}

.cell.frontier:not(.wall):not(.start):not(.end) {
  z-index: 2;
  background: var(--frontier);
  animation: frontierPulse 620ms ease-in-out infinite alternate;
}

.cell.current:not(.wall):not(.start):not(.end) {
  z-index: 3;
  background: var(--current);
  animation: currentPulse 420ms ease-in-out infinite alternate;
}

.cell.visited:not(.wall):not(.start):not(.end) {
  background: var(--visited);
}

.cell.new-frontier:not(.wall):not(.start):not(.end) {
  animation: frontierArrival 440ms cubic-bezier(.2,.8,.2,1) both;
}

@keyframes frontierArrival {
  0% {
    transform: scale(.72);
    background: #fff;
    box-shadow: 0 0 0 0 rgba(50,173,230,.1);
  }
  55% {
    transform: scale(1.08);
    background: #bdeeff;
    box-shadow: 0 0 14px 5px rgba(50,173,230,.34);
  }
  100% {
    transform: scale(1);
    background: var(--frontier);
    box-shadow: 0 0 0 rgba(0,0,0,0);
  }
}

@keyframes frontierPulse {
  from { box-shadow: inset 0 0 0 1px rgba(255,255,255,.42); }
  to { box-shadow: inset 0 0 0 2px rgba(255,255,255,.82), 0 0 10px rgba(50,173,230,.24); }
}

@keyframes currentPulse {
  from { transform: scale(.96); box-shadow: 0 0 6px rgba(0,122,255,.25); }
  to { transform: scale(1.08); box-shadow: 0 0 16px rgba(0,122,255,.42); }
}

.cell.solution:not(.wall):not(.start):not(.end) {
  z-index: 5;
  background: var(--solution);
}

.cell.solution-head:not(.wall):not(.start):not(.end) {
  z-index: 6;
  animation: solutionHead 500ms ease-in-out infinite alternate;
}

@keyframes solutionHead {
  from {
    transform: scale(.94);
    box-shadow: 0 0 6px rgba(255,214,10,.45);
  }
  to {
    transform: scale(1.12);
    box-shadow:
      0 0 12px 4px rgba(255,214,10,.68),
      0 0 22px 8px rgba(255,159,10,.20);
  }
}

.cell.start:not(.wall),
.cell.end:not(.wall) {
  position: relative;
  z-index: 7;
}

.cell.start:not(.wall) {
  background: var(--start);
  box-shadow: inset 0 0 0 3px var(--green);
}

.cell.end:not(.wall) {
  background: var(--end);
  box-shadow: inset 0 0 0 3px var(--red);
}

.cell.goal-burst:not(.wall) {
  animation: goalBurst 720ms cubic-bezier(.2,.8,.2,1) both;
}

@keyframes goalBurst {
  0% { transform: scale(1); }
  45% {
    transform: scale(1.22);
    box-shadow:
      inset 0 0 0 3px var(--red),
      0 0 0 5px rgba(255,69,58,.18),
      0 0 20px 8px rgba(255,69,58,.28);
  }
  100% { transform: scale(1); }
}

.cell.start::after,
.cell.end::after {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-weight: 800;
  font-size: calc(var(--cell-size) * .42);
}

.cell.start::after { content: "S"; color: #248a3d; }
.cell.end::after { content: "E"; color: #d70015; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .info-card { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .app-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

  .nav-bar { align-items: flex-start; }

  .brand-icon {
    width: 52px;
    height: 52px;
    border-radius: 13px;
  }

  .app-title { font-size: 26px; }
  .app-subtitle { display: none; }

  .sidebar { grid-template-columns: 1fr; }

  .content-panel {
    border-radius: 22px;
    padding: 14px;
  }

  .telemetry {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .maze-card { padding: 10px; }
}

@media print {
  @page { size: auto; margin: 0.5in; }

  body { background: #fff; }

  .nav-bar,
  .sidebar,
  .status-text,
  .phase-label,
  .telemetry,
  .legend,
  #offlineBadge {
    display: none !important;
  }

  .app-shell {
    max-width: none;
    padding: 0;
  }

  .workspace { display: block; }

  .content-panel,
  .maze-card {
    border: 0;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }

  .section-title {
    font-size: 26pt;
    margin-bottom: 12pt;
  }

  #maze {
    --cell-size: 0.32in;
    margin: 0 auto;
    border-radius: 0;
    break-inside: avoid;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .cell.carve-trail,
  .cell.carve-spark,
  .cell.carve-head,
  .cell.frontier,
  .cell.current,
  .cell.new-frontier,
  .cell.solution-head,
  .cell.goal-burst {
    animation: none !important;
  }

  .cell.frontier:not(.wall):not(.start):not(.end),
  .cell.current:not(.wall):not(.start):not(.end),
  .cell.visited:not(.wall):not(.start):not(.end) {
    background: #fff;
    box-shadow: none;
  }
}


/* ---------- User solve mode ---------- */

.play-card {
  background: linear-gradient(180deg, rgba(48,209,88,0.085), rgba(255,255,255,0.88));
}

.play-button {
  color: white;
  background: #34c759;
  box-shadow: 0 8px 20px rgba(52,199,89,0.18);
}

.play-button.active {
  background: #248a3d;
  box-shadow: 0 0 0 3px rgba(52,199,89,0.14), 0 8px 20px rgba(52,199,89,0.18);
}

.play-hint {
  margin-top: 9px;
  color: var(--secondary-label);
  font-size: 12px;
  line-height: 1.4;
}

.maze-stage {
  position: relative;
  width: max-content;
  margin: 0 auto;
}

#maze {
  margin: 0;
}

.user-path-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 12;
}

.user-path-glow,
.user-path-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.user-path-glow {
  stroke: rgba(0,122,255,0.26);
  stroke-width: 15;
  filter: blur(3px);
}

.user-path-line {
  stroke: #007aff;
  stroke-width: 7;
  filter: drop-shadow(0 2px 3px rgba(0,122,255,0.22));
  transition: stroke 220ms ease, filter 220ms ease;
}

.user-path-overlay.success .user-path-line {
  stroke: #30d158;
  filter:
    drop-shadow(0 0 5px rgba(48,209,88,0.6))
    drop-shadow(0 0 12px rgba(48,209,88,0.35));
}

.user-path-overlay.success .user-path-glow {
  stroke: rgba(48,209,88,0.30);
}

.user-path-head {
  fill: #fff;
  stroke: #007aff;
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 7px rgba(0,122,255,0.55));
}

.user-path-overlay.success .user-path-head {
  stroke: #30d158;
  filter: drop-shadow(0 0 10px rgba(48,209,88,0.7));
}

.maze-stage.user-solving #maze {
  cursor: crosshair;
}

.maze-stage.user-solving .cell:not(.wall) {
  transition: background-color 100ms ease, box-shadow 100ms ease;
}

.cell.user-covered:not(.wall):not(.start):not(.end) {
  background: #edf6ff;
}

.cell.user-backtrack:not(.wall):not(.start):not(.end) {
  animation: userBacktrack 260ms ease-out;
}

@keyframes userBacktrack {
  0% { background: #ffd6d3; transform: scale(1.08); }
  100% { background: #fff; transform: scale(1); }
}

.cell.user-success:not(.wall) {
  animation: userSuccessCell 660ms cubic-bezier(.2,.8,.2,1) both;
}

@keyframes userSuccessCell {
  0% { transform: scale(1); }
  45% {
    transform: scale(1.10);
    box-shadow: inset 0 0 0 2px rgba(48,209,88,0.35), 0 0 12px rgba(48,209,88,0.35);
  }
  100% { transform: scale(1); }
}

/* Success celebration */

.success-sheet[hidden] {
  display: none;
}

.success-sheet {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  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));
}

.success-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10,12,18,0.22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: successBackdropIn 240ms ease-out both;
}

.success-card {
  position: relative;
  width: min(520px, 100%);
  overflow: hidden;
  border-radius: 28px;
  padding: 28px 22px 20px;
  text-align: center;
  background: rgba(255,255,255,0.94);
  border: 0.5px solid rgba(255,255,255,0.85);
  box-shadow: 0 24px 80px rgba(0,0,0,0.20);
  animation: successCardIn 520ms cubic-bezier(.18,.85,.28,1.15) both;
}

@keyframes successBackdropIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes successCardIn {
  0% { opacity: 0; transform: translateY(18px) scale(.92); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.success-icon {
  width: 66px;
  height: 66px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  color: #7a5b00;
  background: linear-gradient(145deg, #fff3ad, #ffd60a);
  box-shadow: 0 12px 28px rgba(255,214,10,0.24);
  animation: trophyPop 760ms cubic-bezier(.2,.8,.2,1) both;
}

.success-icon svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

@keyframes trophyPop {
  0% { transform: scale(.4) rotate(-12deg); opacity: 0; }
  55% { transform: scale(1.16) rotate(4deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); }
}

.success-kicker {
  color: #248a3d;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.success-title {
  margin-top: 5px;
  font-size: 30px;
  font-weight: 780;
  letter-spacing: -0.035em;
}

.success-subtitle {
  margin-top: 6px;
  color: var(--secondary-label);
  font-size: 14px;
  line-height: 1.4;
}

.success-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 20px 0 18px;
}

.success-metrics div {
  padding: 12px 7px;
  border-radius: 14px;
  background: rgba(118,118,128,0.08);
}

.success-metrics span {
  display: block;
  font-size: 19px;
  font-weight: 760;
  font-variant-numeric: tabular-nums;
}

.success-metrics small {
  display: block;
  margin-top: 3px;
  color: var(--secondary-label);
  font-size: 10px;
  line-height: 1.2;
}

.success-close {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--blue);
  font: inherit;
  font-weight: 650;
  padding: 12px 18px 2px;
  cursor: pointer;
}

.confetti-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  width: 7px;
  height: 13px;
  border-radius: 3px;
  animation: confettiFall var(--dur) cubic-bezier(.15,.7,.25,1) var(--delay) both;
}

@keyframes confettiFall {
  0% {
    opacity: 0;
    transform: translate3d(0,-20px,0) rotate(0deg);
  }
  10% { opacity: 1; }
  100% {
    opacity: 0;
    transform: translate3d(var(--drift),560px,0) rotate(var(--spin));
  }
}

@media (max-width: 560px) {
  .success-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media print {
  .user-path-overlay,
  .success-sheet {
    display: none !important;
  }

  .cell.user-covered:not(.wall):not(.start):not(.end) {
    background: #fff;
  }
}