:root {
  font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:#e9edf8;
  background:#0d1020;
  font-synthesis:none;
  --accent:#91c9ff;
  --dim:#a7b2ca;
  --border:#2b354d;
  --panel:#161d30;
  --muted:#1e2940;
  --danger:#ffa6b5
}
* {
  box-sizing:border-box
}
body {
  margin:0;
  min-height:100vh;
  background:radial-gradient(ellipse at 75% -40%,#243359 0,transparent 65%),#0d1020
}
body.merkle {
  --accent:#9ae5c6
}
body.beats {
  --accent:#d9aeff
}
body.diff {
  --accent:#ffce91
}
button,input,select,textarea {
  font:inherit
}
button,a,select,input {
  touch-action:manipulation
}
button,.button {
  border:1px solid var(--border);
  border-radius:9px;
  background:#202b42;
  color:inherit;
  min-height:39px;
  padding:9px 14px;
  cursor:pointer;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  font-size:13px;
  font-weight:650
}
button:hover,.button:hover {
  background:#2c3c57;
  border-color:#5d7596
}
button.primary {
  background:var(--accent);
  border-color:var(--accent);
  color:#11182b
}
button.primary:hover {
  filter:brightness(1.08)
}
button:disabled {
  opacity:.45;
  cursor:not-allowed
}
button[aria-pressed=true],.selected {
  border-color:var(--accent);
  color:var(--accent);
  background:#25314c
}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible {
  outline:3px solid var(--accent);
  outline-offset:3px
}
input,select,textarea {
  background:#10182a;
  color:inherit;
  border:1px solid var(--border);
  border-radius:8px;
  padding:10px;
  max-width:100%
}
textarea {
  resize:vertical;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:12px;
  line-height:1.65;
  width:100%
}
input[type=range] {
  padding:0;
  accent-color:var(--accent);
  height:28px;
  vertical-align:middle;
  max-width:170px
}
input[type=file] {
  font-size:12px;
  width:100%
}
.shell {
  max-width:1240px;
  margin:0 auto;
  padding:26px 32px 38px
}
.topbar {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-bottom:1px solid var(--border);
  padding-bottom:20px
}
.brand {
  font-weight:800;
  font-size:17px;
  letter-spacing:-.5px;
  color:inherit;
  text-decoration:none
}
.brand b {
  color:var(--accent)
}
.tag {
  font-size:11px;
  letter-spacing:1px;
  text-transform:uppercase;
  color:var(--accent);
  padding:7px 10px;
  border:1px solid #3b4a60;
  border-radius:100px
}
.intro {
  display:flex;
  gap:30px;
  align-items:flex-end;
  justify-content:space-between;
  margin:29px 0 23px
}
.eyebrow {
  font-size:11px;
  letter-spacing:2px;
  color:var(--accent);
  text-transform:uppercase;
  font-weight:700
}
h1 {
  font-size:clamp(28px,4vw,43px);
  letter-spacing:-1.6px;
  line-height:1.05;
  margin:10px 0 12px
}
h2 {
  font-size:16px;
  margin:0 0 12px;
  letter-spacing:-.25px
}
h3 {
  font-size:14px;
  margin:0 0 10px
}
p {
  line-height:1.6
}
.intro p {
  color:var(--dim);
  font-size:14px;
  max-width:650px;
  margin:0
}
.caption,.fine {
  font-size:12px;
  line-height:1.65;
  color:var(--dim)
}
.caption {
  margin:10px 0 0
}
.panel {
  border:1px solid var(--border);
  background:linear-gradient(145deg,#192237,#141b2c);
  border-radius:15px;
  padding:20px;
  min-width:0
}
.panel-head {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:16px
}
.panel-head h2 {
  margin:0
}
.layout {
  display:grid;
  grid-template-columns:minmax(0,1fr) 275px;
  gap:18px
}
.toolbar {
  display:flex;
  align-items:center;
  gap:9px;
  flex-wrap:wrap;
  margin-bottom:17px
}
.toolbar label {
  display:flex;
  gap:8px;
  align-items:center;
  font-size:12px;
  color:var(--dim)
}
.row {
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap
}
.stack {
  display:flex;
  flex-direction:column;
  gap:16px
}
.stat-grid {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:9px
}
.stat {
  background:#101829;
  border:1px solid #2a3650;
  border-radius:10px;
  padding:13px
}
.stat strong {
  display:block;
  font-size:23px;
  line-height:1.3;
  color:var(--accent);
  font-variant-numeric:tabular-nums
}
.stat span {
  font-size:11px;
  color:var(--dim)
}
.status {
  padding:12px 14px;
  background:#101a2d;
  border:1px solid #344960;
  border-radius:9px;
  font-size:12px;
  line-height:1.6;
  min-height:44px;
  margin-top:15px;
  overflow-wrap:anywhere
}
.status.error {
  border-color:#9a5265;
  color:var(--danger)
}
.status.success {
  border-color:#477d74;
  color:#a5e7c7
}
.label {
  display:block;
  font-size:11px;
  color:var(--dim);
  font-weight:650;
  letter-spacing:.7px;
  text-transform:uppercase;
  margin-bottom:8px
}
.mono {
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:12px;
  overflow-wrap:anywhere
}
.rule {
  border-top:1px solid var(--border);
  padding-top:15px;
  margin-top:15px
}
.badge {
  font-size:10px;
  border-radius:5px;
  padding:5px 7px;
  background:#2a3650;
  color:var(--accent);
  display:inline-block
}
.legend {
  display:flex;
  gap:15px;
  flex-wrap:wrap;
  font-size:11px;
  color:var(--dim);
  margin-top:15px
}
.legend span:before {
  content:"";
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:2px;
  margin-right:6px;
  background:var(--accent)
}
.legend .wall:before {
  background:#4c607f
}
.legend .slow:before {
  background:#b67e4e
}
.legend .visited:before {
  background:#3e628c
}
.legend .route:before {
  background:#82e6cd
}
footer {
  border-top:1px solid var(--border);
  padding-top:18px;
  margin-top:25px;
  font-size:11px;
  color:#929fbc;
  display:flex;
  justify-content:space-between;
  gap:20px
}
footer a {
  color:var(--accent)
}
code {
  font-family:ui-monospace,monospace;
  font-size:.93em
}
details {
  font-size:12px;
  color:var(--dim);
  line-height:1.6
}
summary {
  cursor:pointer;
  color:#d9e1f3
}
hr {
  border:0;
  border-top:1px solid var(--border);
  margin:16px 0
}
.fill {
  width:100%
}
.hidden {
  display:none!important
}
.inline {
  display:inline
}
.spacer {
  flex:1
}
.small {
  font-size:11px
}
.notes {
  margin:0;
  font-size:12px;
  color:var(--dim);
  line-height:1.8
}
.scroll {
  overflow:auto
}
.nowrap {
  white-space:nowrap
}
@media(max-width:800px) {
  .shell {
    padding:18px 16px
  }
  .layout {
    grid-template-columns:1fr
  }
  .intro {
    display:block
  }
  .intro .tag {
    display:none
  }
  .panel {
    padding:15px
  }
  .topbar .tag {
    font-size:9px
  }
  .toolbar {
    gap:7px
  }
  footer {
    flex-direction:column;
    gap:6px
  }
  h1 {
    font-size:33px
  }
}
@media(prefers-reduced-motion:reduce) {
  * {
    scroll-behavior:auto!important;
    animation:none!important;
    transition:none!important
  }
}
.map {
  display:grid;
  grid-template-columns:repeat(24,1fr);
  gap:3px;
  min-width:480px;
  user-select:none;
  touch-action:none
}
.cell {
  border-radius:4px;
  min-height:0;
  aspect-ratio:1;
  padding:0;
  background:#202c43;
  border:1px solid #293b56;
  font-size:10px;
  color:#8ea6cb;
  font-weight:800
}
.cell:hover {
  border-color:#dcecff
}
.cell.wall {
  background:#485c7c;
  border-color:#576e91
}
.cell.slow {
  background:#573f35;
  color:#ffcf9a
}
.cell.heavy {
  background:#674136;
  color:#ffc390
}
.cell.explored {
  background:#294e74
}
.cell.path {
  background:#88e6ce;
  color:#173b36;
  box-shadow:0 0 10px #79e4cb28
}
.cell.start {
  background:#88c5ff;
  color:#142238
}
.cell.goal {
  background:#e6b4fa;
  color:#3e2444
}
.cell.start,.cell.goal {
  border-color:transparent
}
.cell:focus-visible {
  outline-offset:0;
  position:relative;
  z-index:2
}
.stack {
  min-width:0
}
.panel-head {
  flex-wrap:wrap
}
@media(max-width:800px) {
  .layout,.proof-layout {
    grid-template-columns:minmax(0,1fr)
  }
}