/* Home: the street is the hero (a real rope you can pull), the controls under it, the rulebook knotted on the page-long rope, wiring, proof, finale. */
.fine { color: var(--mut); font-size: 14.5px; max-width: 900px; }
.mono.addr { color: var(--teal); word-break: break-all; font-size: 13.5px; }
.hl { color: var(--pink); position: relative; white-space: nowrap; }
.hl::after { content: ''; position: absolute; left: 0; right: 0; bottom: -5px; height: 7px; background: var(--teal); border-radius: 4px; opacity: .9; }

/* ---- the street */
.hero { padding: 0; }
.hero-scene { position: relative; width: 100%; background: #06031a; border-bottom: 1px solid var(--line); overflow: hidden; }
.street { position: relative; }
.hero-scene canvas { display: block; width: 100%; image-rendering: pixelated; touch-action: pan-y; }
.hero-copy { position: absolute; left: max(176px, 12.4vw); top: 26px; max-width: 760px; pointer-events: none; }
.hero-copy a { pointer-events: auto; }
.hero h1 { font-size: clamp(34px, 4.4vw, 62px); line-height: 1.02; text-shadow: 0 2px 24px rgba(5, 2, 20, .85); }
.hero-copy .lead { font-size: 17.5px; margin: 12px 0 16px; max-width: 560px; text-shadow: 0 2px 16px rgba(5, 2, 20, .9); }
.hero-copy .eyebrow { text-shadow: 0 1px 10px rgba(5, 2, 20, .9); }
.hud { position: absolute; right: 24px; top: 24px; width: 292px; padding: 14px 16px; background: rgba(14, 8, 44, .82); backdrop-filter: blur(6px); }
.hud-t { display: flex; flex-direction: column; margin-bottom: 8px; } .hud-t b { font-family: var(--pix); font-size: 17px; } .hud-t span { font-size: 12.5px; color: var(--dim); }
.gauge { font-size: 13px; color: var(--mut); display: grid; grid-template-columns: 1fr auto; gap: 3px 10px; align-items: end; margin-top: 8px; }
.gauge .gbar { grid-column: 1 / -1; height: 12px; background: var(--bg); border: 2px solid var(--line); border-radius: 8px; overflow: hidden; }
.gauge .gbar i { display: block; height: 100%; width: 100%; background: var(--pink); transition: width .5s, background .3s; }
.gauge b { color: var(--ink); font-family: var(--mono); font-weight: 500; font-size: 12.5px; }
.drag-hint { margin: 12px 0 0; font-size: 13px; color: var(--ink); display: flex; gap: 8px; align-items: center; } .drag-hint i { width: 10px; height: 10px; background: var(--teal); border-radius: 50%; flex: none; animation: pulse 1.6s infinite; }
@keyframes pulse { 50% { transform: scale(1.6); opacity: .5; } }
.labels { position: absolute; left: 0; right: 0; bottom: 9px; height: 22px; pointer-events: none; }
.labels span { position: absolute; transform: translateX(-50%); font-size: 12px; color: var(--mut); white-space: nowrap; font-family: var(--pix); font-weight: 600; letter-spacing: .02em; }
.bubble { position: absolute; transform: translate(-50%, -100%); padding: 5px 11px; border-radius: 8px; font: 700 13px var(--mono); white-space: nowrap; pointer-events: none; z-index: 3; border: 2px solid; }
.bubble::after { content: ''; position: absolute; left: 50%; bottom: -7px; width: 10px; height: 10px; transform: translateX(-50%) rotate(45deg); background: inherit; border-right: 2px solid; border-bottom: 2px solid; border-color: inherit; }
.bubble.ok { background: #14452b; color: #6df0a8; border-color: #6df0a8; } .bubble.no { background: #4a1414; color: #ff8a82; border-color: #ff3b30; }

/* ---- controls and errands under the street */
.walk { padding: 0 0 80px; }
.controls { padding: 20px 24px; margin-top: 26px; position: relative; z-index: 3; }
.c-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; margin-bottom: 4px; } .c-head h3 { font-size: 22px; } .hint { color: var(--mut); font-size: 14px; margin: 0; }
.ctl-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.15fr); gap: 8px 26px; align-items: center; margin-top: 8px; }
.ctl { display: block; font-size: 14px; color: var(--mut); margin: 8px 0; } .ctl b { float: right; color: var(--ink); font-family: var(--mono); font-weight: 500; }
.ctl input[type=range] { width: 100%; margin-top: 8px; accent-color: var(--pink); }
.toggles { display: grid; gap: 4px; }
.chk { display: flex; gap: 10px; align-items: center; font-size: 14.5px; color: var(--ink); margin: 4px 0; cursor: pointer; } .chk input { accent-color: var(--pink); width: 18px; height: 18px; }
.c-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px; margin-top: 10px; padding-top: 14px; border-top: 1px dashed var(--line); }
.btns { display: flex; flex-wrap: wrap; gap: 8px; }
.clock { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--mono); font-size: 13px; color: var(--mut); }
.btn.on { background: var(--gold); color: #1a1000; border-color: #ffd23f; box-shadow: 3px 3px 0 #7a5000; }
.sumd { margin-top: 12px; border-radius: 10px; } .sumd summary { padding: 10px 16px; font-size: 15px; }
.sum { padding: 4px 18px 14px; font-size: 14px; color: var(--mut); line-height: 1.5; } .sum p { margin: 0 0 6px; } .sum p:last-child { color: var(--dim); }
.title.mini { font-size: clamp(24px, 3vw, 34px); margin: 34px 0 12px; }
.errands { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 12px 0; }
.err { text-align: left; background: var(--card); border: 2px solid var(--line); color: var(--ink); border-radius: 10px; padding: 10px 12px; cursor: pointer; font: 500 14px/1.35 var(--sans); transition: border-color .15s, transform .1s; }
.err:hover { border-color: var(--teal); transform: translateY(-1px); } .err:disabled { opacity: .5; cursor: wait; transform: none; }
.err b { display: block; font-size: 14.5px; } .err small { color: var(--mut); font-size: 12.5px; }
.err.bad small::before { content: 'a bad idea: '; color: #ff8a82; }
.duo { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 18px; margin-top: 14px; align-items: start; }
.console { padding: 16px 18px; min-height: 150px; }
.c-empty { color: var(--dim); font-size: 14.5px; }
.c-row { display: grid; grid-template-columns: 78px 1fr; gap: 6px 12px; font-size: 14px; margin: 5px 0; align-items: baseline; } .c-row > span:first-child { color: var(--dim); font-family: var(--pix); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.c-row code { font-family: var(--mono); font-size: 12.5px; color: var(--teal); word-break: break-all; }
.verdict { display: inline-block; font-family: var(--mono); font-weight: 600; font-size: 13.5px; padding: 2px 10px; border-radius: 6px; } .verdict.ok { background: rgba(109,240,168,.15); color: #6df0a8; } .verdict.no { background: rgba(255,59,48,.18); color: #ff8a82; }
.why { color: var(--ink); }
.s-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.s-log { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; max-height: 230px; overflow: auto; font-size: 13.5px; }
.s-log li { display: flex; gap: 10px; align-items: baseline; padding: 6px 10px; background: var(--card); border-radius: 8px; border-left: 4px solid var(--line); color: var(--mut); }
.s-log li.ok { border-left-color: #6df0a8; } .s-log li.no { border-left-color: #ff3b30; } .s-log li.meta { border-left-color: var(--gold); }
.s-log li .t { font-family: var(--mono); font-size: 12px; color: var(--dim); flex: none; width: 74px; } .s-log li .m { margin-left: auto; font-size: 12px; font-family: var(--mono); color: var(--dim); flex: none; }
.s-log li .m.same { color: #6df0a8; } .s-log li .m.diff { color: #ff6b6b; }
.s-res { margin: 10px 0 0; font-size: 14.5px; color: var(--mut); min-height: 22px; } .s-res b { color: var(--ink); }

/* ---- the rope that runs down the page (rail.js draws it) */
body.has-rail { position: relative; }
#rail { position: absolute; left: 0; top: 0; width: 300px; height: 100%; z-index: 4; pointer-events: none; overflow: visible; }
#rail .coin circle.r { transition: fill .4s, stroke .4s; } #rail .coin text { font: 800 11px var(--pix); text-anchor: middle; }
@media (min-width: 1200px) {
  .has-rail main section:not(.finale) .wrap, .has-rail main .narrow { width: min(1100px, 100% - 250px); margin-left: 200px; margin-right: auto; }
}
@media (max-width: 1199px) { #rail { display: none; } .hero-copy { left: 24px; } }

/* ---- rulebook */
.rules { padding: 80px 0; }
.rules-in { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 34px; margin-top: 32px; align-items: start; }
.ridx { position: sticky; top: 90px; display: grid; gap: 4px; }
.ridx a { display: flex; gap: 12px; align-items: center; padding: 9px 12px; color: var(--mut); border-radius: 10px; font-size: 15px; text-decoration: none; font-weight: 500; }
.ridx a i { font-style: normal; font-family: var(--pix); font-weight: 800; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: var(--card2); color: var(--ink); font-size: 13px; flex: none; }
.ridx a:hover { color: var(--ink); background: var(--card); } .ridx a.on { color: var(--ink); background: var(--card2); } .ridx a.on i { background: var(--gold); color: #1a1000; }
.rcards { display: grid; gap: 18px; }
.rcard { padding: 24px 26px; scroll-margin-top: 90px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 22px; align-items: start; }
.rcard h3 { font-size: 26px; margin-bottom: 8px; } .rcard p { color: var(--mut); margin: 0 0 8px; font-size: 16px; }
.rcard .num { font-family: var(--pix); font-weight: 800; color: var(--gold); font-size: 14px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 6px; }
.demo { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 6px 12px; }
.demo .row { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 14px; } .demo .row:last-child { border: 0; }
.demo .row span:first-child { color: var(--ink); } .demo .row .verdict { flex: none; }
.demo .cap { font-size: 12.5px; color: var(--dim); padding: 8px 0 4px; }

/* ---- wiring, proof, finale */
#how { padding: 80px 0; } .steps3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
.step { padding: 24px; } .step h3 { font-size: 24px; margin: 6px 0 8px; } .step p { color: var(--mut); font-size: 15.5px; }
.step .sn { width: 38px; height: 38px; border-radius: 50%; background: var(--pink); display: grid; place-items: center; font: 800 18px var(--pix); }
.step pre.code { white-space: pre-wrap; word-break: break-all; font-size: 12px; max-height: 150px; overflow: auto; }
#proof, #faq, .rules { border-block: 1px solid var(--line); }
#proof { padding: 80px 0; } .stats4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 30px 0 22px; }
.stats4 .px { padding: 20px; } .stats4 b { display: block; font-family: var(--pix); font-weight: 800; font-size: clamp(38px, 4.4vw, 56px); line-height: 1; color: var(--teal); } .stats4 span { color: var(--mut); font-size: 14.5px; display: block; margin-top: 8px; }
#limits { padding: 80px 0; } #faq { padding: 80px 0; }
.finale { position: relative; padding: 0 0 80px; border-top: 1px solid var(--line); }
.finale picture img { width: 100%; image-rendering: pixelated; }
.fin-in { margin-top: -10px; } .fin-in .title { margin: 28px 0 10px; } .fin-in .cta { margin-top: 22px; }

@media (max-width: 1040px) {
  .rules-in { grid-template-columns: 1fr; } .ridx { position: static; grid-auto-flow: column; overflow-x: auto; } .ridx a span { display: none; }
  .rcard { grid-template-columns: 1fr; } .steps3, .stats4 { grid-template-columns: 1fr 1fr; }
  .ctl-grid { grid-template-columns: 1fr 1fr; } .duo { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .hero-copy { position: static; padding: 26px 20px 12px; max-width: none; } .hero-scene { display: flex; flex-direction: column; }
  .street { order: 2; } .hero-copy { order: 1; } .hud { position: static; order: 3; width: auto; margin: 10px 16px; }
}
@media (max-width: 760px) {
  .errands { grid-template-columns: 1fr 1fr; } .steps3, .stats4 { grid-template-columns: 1fr; } .ctl-grid { grid-template-columns: 1fr; }
  .walk, #how, #proof, #limits, #faq, .rules { padding-top: 56px; padding-bottom: 56px; } .controls { margin-top: 0; }
}
@media (max-width: 480px) { .errands { grid-template-columns: 1fr; } .c-row { grid-template-columns: 1fr; } }