:root{font-family:Trebuchet MS,Arial Rounded MT Bold,system-ui,sans-serif;color:#253238;background:#efe8cf;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;overflow-x:hidden}button{font:inherit;color:inherit;-webkit-tap-highlight-color:transparent}button:focus-visible{outline:4px solid #fff;box-shadow:0 0 0 7px #3b82f6;z-index:10}.game{min-height:100vh;display:flex;flex-direction:column;transition:background .3s;--ground: #85cb67;--ground-dark: #62b34c;--sky: #d8f2c2}.theme-jungle{--ground: #80c964;--ground-dark: #5bad47;--sky: #d8f4c9;background:linear-gradient(#dff6d4,#a8d99b)}.theme-desert{--ground: #edc36d;--ground-dark: #d6a94c;--sky: #ffedbb;background:linear-gradient(#fff0c4,#eac06a)}.theme-city{--ground: #a8bec5;--ground-dark: #8fa8b0;--sky: #dcecf3;background:linear-gradient(#e8f4f7,#b1cbd2)}.topbar{min-height:78px;padding:8px clamp(10px,3vw,28px);display:flex;align-items:center;gap:14px;background:#ffffffd1;border-bottom:4px solid rgba(48,71,55,.15);box-shadow:0 3px 12px #20381d22}.brand{flex:1;display:flex;justify-content:center;align-items:center;gap:11px;text-align:left;line-height:1}.brand>span{font-size:clamp(34px,5vw,51px);filter:drop-shadow(0 3px 0 #ffffff)}h1{font-size:clamp(24px,4vw,38px);margin:0;color:#153a43;letter-spacing:-.6px}.brand p{margin:4px 0 0;color:#53706f;font-weight:700;font-size:clamp(13px,1.8vw,17px)}.round-button{width:54px;height:54px;flex:0 0 54px;border:0;border-radius:17px;background:#fff;font-size:28px;cursor:pointer;box-shadow:0 4px #b7c8c2,0 6px 12px #334b4430}.round-button:active{transform:translateY(3px);box-shadow:0 1px #b7c8c2}.toolbar{padding:10px clamp(8px,2vw,22px);display:flex;align-items:stretch;gap:9px;background:#213a3eeb;overflow-x:auto;overscroll-behavior-inline:contain}.toolbar button{min-width:74px;min-height:58px;padding:5px 10px;border:0;border-radius:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap;box-shadow:0 4px #00000045;background:#f8fbf9}.toolbar button span{font-size:27px}.toolbar button b{font-size:15px}.toolbar .tool[aria-pressed=true]{background:#ffdb4d;box-shadow:0 4px #d69d18,inset 0 0 0 3px #fff4ac;transform:translateY(-1px)}.toolbar button:active{transform:translateY(3px);box-shadow:0 1px #0000004d}.toolbar-gap{flex:1;min-width:6px}.toolbar .small-action{min-width:66px;padding-inline:8px}.small-action:disabled{opacity:.45;cursor:default}.small-action.danger{background:#ffe4de}.small-action.danger.armed{background:#ff8d75;animation:wiggle .45s ease-in-out 2}.board-shell{flex:1;padding:clamp(9px,2.3vw,22px);min-height:0;display:flex;flex-direction:column}.board-scroll{flex:1;min-height:300px;display:flex;overflow:auto;border:7px solid #fff9e3;border-radius:24px;box-shadow:0 8px #4b422840,0 14px 22px #3444222d;background:var(--ground);touch-action:none}.board{--cols: 12;margin:auto;display:grid;grid-template-columns:repeat(var(--cols),minmax(48px,1fr));width:100%;min-width:calc(var(--cols) * 48px);aspect-ratio:12 / 8;min-height:384px;background-color:var(--ground);background-image:linear-gradient(#ffffff12 1px,transparent 1px),linear-gradient(90deg,#ffffff12 1px,transparent 1px);background-size:calc(100% / 12) 12.5%;-webkit-user-select:none;user-select:none}.cell{position:relative;min-width:48px;min-height:48px;border:0;padding:0;overflow:visible;background:transparent;cursor:crosshair;touch-action:none}.cell:hover{background:#ffffff1c}.decor{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;font-size:clamp(20px,2.6vw,35px);opacity:.75;filter:drop-shadow(0 3px 1px #2c4a3033)}.road-layer,.rail-layer{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.road-layer{z-index:2}.rail-layer{z-index:3}.road-layer .hub,.road-layer .arm{position:absolute;background-color:#59636a;background-image:linear-gradient(115deg,#ffffff08 25%,transparent 25%,transparent 75%,#00000008 75%)}.road-layer .hub{z-index:2;width:64%;height:64%;left:18%;top:18%;border-radius:16%;box-shadow:inset 0 0 0 2px #424b50}.road-layer:has(.arm) .hub{border-radius:6%;box-shadow:none}.road-layer .arm{z-index:1}.road-layer .arm.n,.road-layer .arm.s{width:64%;height:52%;left:18%;border-left:3px solid #d9d2bd;border-right:3px solid #d9d2bd;box-shadow:inset 3px 0 #f4f0df55,inset -3px 0 #f4f0df55}.road-layer .arm.n{top:0}.road-layer .arm.s{bottom:0}.road-layer .arm.e,.road-layer .arm.w{height:64%;width:52%;top:18%;border-top:3px solid #d9d2bd;border-bottom:3px solid #d9d2bd;box-shadow:inset 0 3px #f4f0df55,inset 0 -3px #f4f0df55}.road-layer .arm.e{right:0}.road-layer .arm.w{left:0}.road-layer .arm:after{content:"";position:absolute;z-index:3;border-radius:2px}.road-layer .arm.n:after,.road-layer .arm.s:after{width:3px;height:100%;left:calc(50% - 1.5px);top:0;background:repeating-linear-gradient(0deg,#ffd659 0 8px,transparent 8px 15px)}.road-layer .arm.e:after,.road-layer .arm.w:after{width:100%;height:3px;left:0;top:calc(50% - 1.5px);background:repeating-linear-gradient(90deg,#ffd659 0 8px,transparent 8px 15px)}.road-layer .hub:after{content:"";position:absolute;width:8px;height:8px;left:calc(50% - 4px);top:calc(50% - 4px);border-radius:50%;background:#ffd659;box-shadow:0 0 0 2px #4b555b}.rail-layer .hub,.rail-layer .arm{position:absolute;background-color:#71523c}.rail-layer .hub{width:36%;height:36%;left:32%;top:32%;background:repeating-linear-gradient(90deg,#b89063 0,#b89063 5px,#4a3d35 5px,#4a3d35 9px);border-left:4px solid #e0e4dc;border-right:4px solid #e0e4dc}.rail-layer .arm.n,.rail-layer .arm.s{width:36%;height:50%;left:32%;background:repeating-linear-gradient(0deg,#b89063 0,#b89063 5px,#4a3d35 5px,#4a3d35 9px);border-left:4px solid #e0e4dc;border-right:4px solid #e0e4dc}.rail-layer .arm.n{top:0}.rail-layer .arm.s{bottom:0}.rail-layer .arm.e,.rail-layer .arm.w{height:36%;width:50%;top:32%;background:repeating-linear-gradient(90deg,#b89063 0,#b89063 5px,#4a3d35 5px,#4a3d35 9px);border-top:4px solid #e0e4dc;border-bottom:4px solid #e0e4dc}.rail-layer .arm.e{right:0}.rail-layer .arm.w{left:0}.is-crossing .rail-layer{filter:drop-shadow(0 1px 0 #fff)}.crossing-control{position:absolute;z-index:10;width:38px;height:20px;pointer-events:none}.crossing-one{left:1px;top:1px}.crossing-two{right:1px;bottom:1px;transform:rotate(180deg)}.crossing-light{position:absolute;left:0;top:3px;width:13px;height:13px;border:3px solid #20282a;border-radius:50%;background:#5d2828;box-shadow:0 2px #1118}.gate-arm{position:absolute;left:10px;top:8px;width:30px;height:6px;border:1px solid #8d2a28;border-radius:3px;transform-origin:2px 50%;transform:rotate(-58deg);background:repeating-linear-gradient(90deg,#fff 0,#fff 6px,#e6423b 6px,#e6423b 12px);box-shadow:0 2px 1px #1117;transition:transform .28s ease-in-out}.gate-closed .gate-arm{transform:rotate(0)}.gate-closed .crossing-light{background:#ff2929;box-shadow:0 0 9px #ff1f1f,0 2px #1118;animation:crossing-flash .5s steps(1) infinite}.gate-closed .crossing-two .crossing-light{animation-delay:.25s}.traffic-light{position:absolute;z-index:8;width:11px;height:25px;border-radius:4px;background:#1e2628;padding:2px;display:flex;flex-direction:column;gap:1px;box-shadow:0 1px 2px #111;animation:pop .3s ease-out}.traffic-light i{flex:1;border-radius:50%;background:#4e5c5b}.traffic-light i:first-child{background:#ff4b45;box-shadow:0 0 5px #ff4b45}.tl-one{left:4px;top:3px}.tl-two{right:4px;bottom:3px;transform:rotate(180deg)}.game[data-green-axis=horizontal] .traffic-light.horizontal i:first-child,.game[data-green-axis=vertical] .traffic-light.vertical i:first-child{background:#4e5c5b;box-shadow:none}.game[data-green-axis=horizontal] .traffic-light.horizontal i:last-child,.game[data-green-axis=vertical] .traffic-light.vertical i:last-child{background:#52dc69;box-shadow:0 0 5px #52dc69}.vehicle{position:absolute;z-index:12;left:50%;top:50%;font-size:clamp(22px,2.5vw,31px);line-height:1;pointer-events:none;filter:drop-shadow(0 3px 1px #17202588)}.vehicle.horizontal{animation:vehicle-horizontal 1.1s ease-in-out infinite alternate}.vehicle.vertical{animation:vehicle-vertical 1.1s ease-in-out infinite alternate}.vehicle.stopped.horizontal{animation:none;transform:translate(-50%,-50%)}.vehicle.stopped.vertical{animation:none;transform:translate(-50%,-50%) rotate(90deg)}.vehicle.train{z-index:13;font-size:clamp(24px,2.8vw,34px)}.vehicle.car+.vehicle.train{margin-left:9px}.tip{align-self:center;margin-top:13px;background:#fff;border-radius:999px;padding:7px 22px;box-shadow:0 3px #c8bfa0;color:#3d5a56;font-weight:800;font-size:clamp(14px,2vw,18px);text-align:center}footer{min-height:34px;padding:5px 20px;display:flex;justify-content:space-between;gap:20px;color:#36504b;font-size:14px;font-weight:700;background:#ffffff73}.modal{position:fixed;z-index:50;top:0;right:0;bottom:0;left:0;padding:20px;background:#142326ad;display:none;place-items:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal.open{display:grid}.modal-card{position:relative;width:min(650px,100%);max-height:95vh;overflow-y:auto;padding:clamp(22px,5vw,42px);text-align:center;border-radius:30px;background:#fffdf4;border:6px solid #fff;box-shadow:0 13px #1b2c2c55,0 25px 50px #101e1e66;animation:modal-in .35s cubic-bezier(.2,1.6,.4,1)}.modal h2{margin:0;font-size:clamp(28px,5vw,43px);color:#183f45}.modal-card>p{margin:5px 0 22px;font-size:18px;color:#58706c}.mascot{font-size:62px;margin-top:-18px;animation:train-bob 1.2s ease-in-out infinite}.map-options{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.map-option{min-height:148px;border:0;border-radius:23px;cursor:pointer;display:flex;flex-direction:column;justify-content:center;gap:3px;box-shadow:inset 0 -7px #0002,0 6px 10px #1d32242f;transition:transform .15s}.map-option:hover{transform:translateY(-5px) rotate(-1deg)}.map-option span{font-size:59px}.map-option b{font-size:22px}.map-option.jungle{background:#a8dc83}.map-option.desert{background:#f5cf73}.map-option.city{background:#b9d4dc}.modal-close{position:absolute;right:15px;top:15px;width:48px;height:48px;border:0;border-radius:50%;background:#e7ece8;cursor:pointer;font-size:21px}.help-card{text-align:left}.help-card h2{text-align:center;margin-bottom:20px}.help-step{display:flex;gap:15px;align-items:center;margin:13px 0;padding:11px;background:#f1f6ec;border-radius:17px}.help-step>span{width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;border-radius:50%;background:#ffcf43;font-size:25px;font-weight:800}.help-step b{font-size:20px}.help-step p{margin:0;color:#5a716d;line-height:1.2}.lets-build{width:100%;min-height:56px;margin-top:15px;border:0;border-radius:17px;background:#50bd66;color:#fff;font-size:21px;font-weight:800;box-shadow:0 5px #288b3e;cursor:pointer}.toast{position:fixed;z-index:100;left:50%;bottom:55px;transform:translate(-50%,30px);opacity:0;pointer-events:none;padding:12px 23px;border-radius:16px;background:#162d31ed;color:#fff;font-size:18px;font-weight:800;text-align:center;transition:.25s;box-shadow:0 5px 18px #0005}.toast.show{opacity:1;transform:translate(-50%)}@keyframes crossing-flash{50%{background:#5d2828;box-shadow:0 2px #1118}}@keyframes pop{0%{transform:scale(0)}to{transform:scale(1)}}@keyframes modal-in{0%{opacity:0;transform:scale(.75)}}@keyframes train-bob{50%{transform:translate(8px) rotate(3deg)}}@keyframes wiggle{25%{transform:rotate(-3deg)}75%{transform:rotate(3deg)}}@keyframes vehicle-horizontal{0%{transform:translate(-65%,-50%)}to{transform:translate(-35%,-50%)}}@keyframes vehicle-vertical{0%{transform:translate(-50%,-65%) rotate(90deg)}to{transform:translate(-50%,-35%) rotate(90deg)}}@media(max-width:650px){.topbar{min-height:64px}.brand p{display:none}.round-button{width:48px;height:48px;flex-basis:48px}.toolbar{padding-block:7px}.toolbar button{min-height:50px;min-width:66px;flex-direction:column;gap:0;padding:2px 7px}.toolbar button span{font-size:23px}.toolbar button b{font-size:12px}.board-shell{padding:8px}.board-scroll{border-width:5px;border-radius:17px}.map-options{grid-template-columns:1fr}.map-option{min-height:90px;flex-direction:row;align-items:center;gap:15px}.map-option span{font-size:47px}.modal-card{padding:25px 18px}.mascot{font-size:48px}footer span:last-child{display:none}}@media(max-height:540px)and (orientation:landscape){.topbar{min-height:54px;padding-block:3px}.round-button{width:44px;height:44px;flex-basis:44px;font-size:23px}.brand>span{font-size:31px}h1{font-size:24px}.toolbar{position:absolute;z-index:20;left:5px;top:61px;bottom:auto;width:120px;display:grid;grid-template-columns:repeat(2,52px);align-content:start;gap:6px;overflow:visible;background:#263d40d9;border-radius:15px}.toolbar button{min-height:52px;min-width:52px;width:52px;flex:none;padding:2px}.toolbar button span{font-size:26px}.toolbar button b,.toolbar-gap{display:none}.board-shell{padding:7px 7px 7px 128px}.board-scroll{min-height:270px}.tip,footer{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}