:root{--bg:#101b22;--panel:#16262e;--mint:#c1f5bf;--cream:#f3eee0;--muted:#8fa7aa;--red:#ff6875;--gold:#ffda84;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--cream);font-family:"PingFang SC","Microsoft YaHei",sans-serif;-webkit-tap-highlight-color:transparent}body::before{content:"";position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 50% 40%,#28403e88,transparent 60%)}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer;color:inherit;border:0}button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:4px}button:disabled{cursor:default;opacity:.35}.hidden{display:none!important}.game-shell{position:relative;max-width:560px;height:100dvh;height:100svh;min-height:480px;margin:auto;display:flex;flex-direction:column;padding:0 18px}.brand-bar{height:76px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;color:var(--cream);text-decoration:none}.brand-icon{font-size:37px;color:var(--mint)}.brand b{font-size:19px;letter-spacing:3px}.brand small{display:block;font:8px/1.8 monospace;letter-spacing:2px;color:var(--muted)}.tools{display:flex;gap:8px}.icon-button{width:40px;height:40px;background:#ffffff07;border:1px solid #ffffff18;border-radius:50%;font-size:18px}.icon-button:hover{background:#ffffff18}.game-view{position:relative;flex:1;min-height:0;overflow:hidden;border:1px solid #bdded51c;border-radius:24px;background:#13242b;display:flex;flex-direction:column;box-shadow:0 24px 80px #0003}.field-wrap{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;overflow:hidden}.field{position:relative;height:100%;max-width:100%;aspect-ratio:600/760;touch-action:none;user-select:none}canvas{display:block;width:100%;height:100%;object-fit:contain}.screen{position:absolute;inset:0;z-index:4;display:flex;flex-direction:column;padding:30px}.home{background:linear-gradient(180deg,#13242b55,transparent 48%,#13242bf2 73%)}.eyebrow{font:9px/1.5 monospace;letter-spacing:2px;color:var(--muted);display:flex;align-items:center;gap:8px;margin:0}.eyebrow i{height:5px;width:5px;border-radius:50%;background:var(--mint)}.hero-title{margin-top:22px;pointer-events:none}.hero-title h1{font-size:clamp(65px,11vh,100px);font-weight:800;letter-spacing:-7px;line-height:1;margin:0}.hero-title h1 span{color:var(--mint)}.hero-title p{margin:16px 0;color:#bdcec9;font-size:13px;letter-spacing:5px}.home-bottom{margin-top:auto}.mode-picker{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mode-picker button{display:grid;grid-template-columns:30px 1fr;gap:4px;text-align:left;align-items:center;padding:16px;background:#20343b;border:1px solid #ffffff13;border-radius:15px;font-weight:700;font-size:15px}.mode-picker button>span{grid-row:span 2;font-size:29px;font-weight:400}.mode-picker small{grid-column:2;font:10px monospace;color:var(--muted)}.mode-picker .selected{border-color:var(--mint);background:#c1f5bf13;color:var(--mint)}.levels{display:flex;gap:8px;margin:14px 0}.levels button{flex:1;background:transparent;min-height:45px;border-radius:10px;border:1px solid #ffffff14;font:14px monospace}.levels button.active{background:var(--cream);color:var(--bg)}.levels button small{display:block;font-size:8px;margin-top:4px;color:#98b28e}.primary{width:100%;height:56px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 22px;background:var(--mint);color:#142624;border-radius:14px;font-size:16px;font-weight:800;margin-top:12px;box-shadow:0 4px 0 #7eae8533}.primary:hover{background:#d6ffd4}.primary:active{transform:translateY(2px)}.home-hint{display:flex;gap:8px;align-items:center;justify-content:center;margin-top:18px;font-size:10px;color:var(--muted)}.home-hint i{height:3px;width:3px;background:var(--muted);margin:0 12px;border-radius:50%}.home-hint span{font-size:19px;color:var(--cream)}.desktop-note{text-align:center;font-size:10px;letter-spacing:3px;color:#738d90;padding:16px;flex-shrink:0}.desktop-note span{font:8px monospace;letter-spacing:2px;display:block;margin-top:6px}.hud{flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:17px 20px 14px;position:relative;gap:12px;background:#15282e;z-index:2}.hud small{font-size:10px;color:var(--muted);display:block;margin-bottom:5px}.hud b{font:700 24px monospace}.hud b span{font-size:12px;color:var(--muted);margin-left:3px}.hud-score{text-align:center}.hud-right{display:flex;align-items:center;gap:12px}.hud-right>span{color:var(--mint);font-size:17px;letter-spacing:3px}.progress{position:absolute;bottom:0;left:0;width:100%;height:2px;background:#ffffff08}.progress i{display:block;background:var(--mint);width:0;height:100%;transition:width .1s}.controls{height:104px;padding:12px 5px max(12px,var(--safe-bottom));display:flex;align-items:center;gap:18px;flex-shrink:0;touch-action:none}.control-guide{display:flex;align-items:center;gap:8px;font-size:10px;color:var(--muted)}.control-cross{font-size:35px;color:var(--cream)}.control-guide small{display:block;font:8px monospace;margin-top:5px}.energy-wrap{flex:1;min-width:35px}.energy-caption{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);margin-bottom:7px}.energy-track{height:5px;background:#ffffff13;border-radius:5px;overflow:hidden}.energy-track i{display:block;width:0;height:100%;background:var(--mint);transition:width .1s}.overload .energy-track i{background:#c4b5ff}.dash{width:76px;height:76px;border-radius:50%;background:var(--mint);color:#142624;display:flex;flex-direction:column;align-items:center;justify-content:center;border:3px solid #e1ffdd;flex-shrink:0;touch-action:none}.dash b{font-size:33px;line-height:.9}.dash span{font-size:10px;font-weight:700;margin-top:4px}.dash small{font:7px monospace;margin-top:3px}.dash.cooldown{background:#263b44;color:#93aaaf;border-color:#425962}.toast{position:absolute;top:12%;left:50%;transform:translate(-50%,-8px);white-space:nowrap;background:#14292cee;color:var(--mint);border:1px solid #c1f5bf40;padding:9px 17px;border-radius:30px;font-size:12px;pointer-events:none;opacity:0;transition:opacity .15s,transform .15s;z-index:2}.toast.show{opacity:1;transform:translate(-50%,0)}.joystick{position:absolute;width:94px;height:94px;border:1px solid #d5f0e25c;border-radius:50%;background:#b5ddd515;transform:translate(-50%,-50%);pointer-events:none}.joystick i{position:absolute;left:50%;top:50%;width:34px;height:34px;background:#c1f5bf88;border:2px solid #dfffec;border-radius:50%;transform:translate(-50%,-50%)}.result,.compact-screen,.tutorial{background:#14262bf5;backdrop-filter:blur(12px);align-items:center;justify-content:center;text-align:center}.result-symbol{color:var(--mint);font-size:70px;line-height:1.1}.result .eyebrow{justify-content:center;margin:12px 0}.screen h2{font-size:30px;letter-spacing:1px;margin:10px 0}.stars{color:var(--gold);font-size:24px;letter-spacing:9px;margin:8px}.result-number{font:700 clamp(42px,8vh,68px) monospace;letter-spacing:-3px;margin-top:15px}.muted{font-size:11px;color:var(--muted);line-height:1.7;margin:8px 0}.result-stats{display:flex;width:100%;justify-content:space-evenly;border-block:1px solid #ffffff12;padding:16px 0;margin:15px 0}.result-stats b{display:block;font:22px monospace}.result-stats small{font-size:10px;color:var(--muted);display:block;margin-top:6px}.secondary-actions{display:flex;justify-content:space-between;width:100%;margin-top:20px}.secondary-actions button,.text-button{background:none;color:var(--muted);font-size:12px;min-height:44px;padding:8px 12px}.pause-art{font-size:65px;color:var(--mint);margin-bottom:20px}.compact-screen .primary{max-width:280px;margin:30px 0 12px}.tutorial{padding:24px;gap:15px}.tutorial-heading{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:5px}.tutorial h2{font-size:23px}.lesson{width:100%;text-align:left;border-bottom:1px solid #ffffff13;padding-bottom:12px;display:flex;gap:18px;align-items:center}.lesson b{font-size:13px;display:block}.lesson small{font-size:10px;color:var(--muted);display:block;margin-top:8px;line-height:1.7}.demo{width:116px;height:95px;background:#0e1e25;border:1px solid #ffffff10;border-radius:14px;position:relative;overflow:hidden;flex-shrink:0}.demo-core{position:absolute;width:17px;height:17px;border-radius:5px;background:var(--mint);left:24px;top:40px;box-shadow:0 0 15px #c1f5bf55;z-index:1}.demo-finger{position:absolute;left:20px;top:58px;color:#fff8;font-size:24px;animation:slide 3s ease-in-out infinite}.move-demo .demo-core{animation:slide 3s ease-in-out infinite}.demo-path{position:absolute;left:30px;top:47px;width:56px;border-top:1px dashed #c1f5bf55}.demo-beam{position:absolute;left:57px;top:0;height:100%;border-left:2px dashed var(--gold)}.warn-demo .demo-beam{animation:warn 3s infinite}.warn-demo .demo-core{animation:evade 3s infinite;left:49px}.dash-demo .demo-beam{border-left:4px solid var(--red);box-shadow:0 0 14px #ff687577}.dash-demo .demo-core{animation:dash 3s infinite}.demo-burst{position:absolute;right:9px;bottom:8px;color:var(--mint);font-size:19px}.tutorial .primary{margin-top:0}.playing .desktop-note{display:none}
@keyframes slide{0%,15%,100%{transform:translateX(0)}50%,70%{transform:translateX(52px)}}@keyframes warn{0%,55%,100%{border-left:2px dashed var(--gold);opacity:.65;box-shadow:none}60%,90%{border-left:5px solid var(--red);opacity:1;box-shadow:0 0 18px #ff6875}}@keyframes evade{0%,20%,100%{transform:translateX(0)}45%,90%{transform:translateX(-28px)}}@keyframes dash{0%,30%,100%{transform:translateX(0);background:var(--mint)}39%,75%{transform:translateX(65px);background:#c4b5ff;box-shadow:-20px 0 0 #c4b5ff44,-40px 0 0 #c4b5ff18}}
@media(min-width:850px){.game-shell{padding-top:5px;padding-bottom:5px}.game-shell::before{content:"L / D";position:fixed;left:calc(50% - 480px);top:45%;font:700 74px monospace;letter-spacing:-8px;color:#c1f5bf10;pointer-events:none}.game-shell::after{content:"";position:fixed;right:calc(50% - 490px);top:52%;font:9px monospace;letter-spacing:4px;color:#8fa7aa66;writing-mode:vertical-rl}}
@media(max-width:600px){.game-shell{padding:var(--safe-top) 10px 0;min-height:440px}.brand-bar{height:58px;padding:0 8px}.game-view{border-radius:19px}.home{padding:25px}.hero-title{margin-top:20px}.desktop-note{padding:12px;font-size:9px}.desktop-note span{display:none}.controls{height:100px;gap:13px;padding-bottom:max(10px,var(--safe-bottom))}.hud{padding:13px 15px 11px}.hud b{font-size:21px}.hud-right{gap:6px}.control-guide small{display:none}.dash small{display:none}.dash{width:74px;height:74px}.mode-picker button{padding:13px;font-size:14px}.home-hint{margin-top:14px}}
@media(max-height:700px){.brand-bar{height:52px}.screen{padding:20px}.hero-title{margin-top:12px}.hero-title h1{font-size:64px}.hero-title p{margin-top:10px}.eyebrow{font-size:8px}.home-hint{margin-top:10px}.mode-picker button{padding:10px}.levels{margin:8px 0}.levels button{min-height:37px}.primary{height:48px;margin-top:7px}.desktop-note{padding:9px}.result-symbol{font-size:38px}.result .eyebrow{margin:5px}.screen h2{font-size:25px}.result-number{font-size:42px;margin-top:3px}.result-stats{padding:10px 0;margin:8px 0}.secondary-actions{margin-top:8px}.tutorial{gap:10px}.demo{height:80px;width:100px}.controls{height:86px}.dash{height:68px;width:68px}.lesson{padding-bottom:8px}.tutorial h2{font-size:20px}}
@media(orientation:landscape) and (max-height:520px){.game-shell{max-width:900px;min-height:300px;padding:0 12px}.brand-bar{height:45px}.game-view{margin-right:104px}.controls{position:absolute;right:12px;top:52px;bottom:10px;height:auto;width:87px;flex-direction:column;justify-content:flex-end;gap:15px}.control-guide{display:none}.energy-wrap{flex:0;width:70px}.desktop-note{display:none}.home{display:grid;grid-template-columns:1fr 1fr;gap:10px 30px}.home>.eyebrow{grid-column:1}.hero-title{grid-column:1;grid-row:2}.home-bottom{grid-column:2;grid-row:1/4;margin:auto 0}.hero-title h1{font-size:70px}.home-hint{display:none}.hud{padding:6px 14px}.hud small{margin-bottom:0}.hud b{font-size:17px}.hud-right .icon-button{height:30px;width:30px}.result{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.result-symbol,.result .eyebrow,.result h2,.result .stars,.result-number,.result>p{grid-column:1;margin:0}.result-stats{grid-column:2;grid-row:2/4}.result .primary{grid-column:2;grid-row:4}.result .secondary-actions{grid-column:2;grid-row:5}.tutorial{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.tutorial-heading{grid-column:1/4}.lesson{display:flex;flex-direction:column;gap:7px;border:0}.lesson small{margin-top:3px;font-size:8px}.lesson b{font-size:10px}.tutorial .primary{grid-column:1/4;height:37px}.demo{height:75px}.compact-screen .primary{margin-top:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.move-demo .demo-core{transform:translateX(45px)}.warn-demo .demo-core{transform:translateX(-28px)}.dash-demo .demo-core{transform:translateX(65px)}}

.field-wrap{touch-action:none}.field:focus{outline:none}

@media(pointer:coarse){.icon-button{min-width:44px;min-height:44px}.levels button{min-height:44px}}

/* Three compact chapter rows keep every mechanic one tap away. */
.levels{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin:9px 0}.chapter-name{grid-column:1/-1;font-size:9px;letter-spacing:2px;color:var(--muted);text-align:left;margin:4px 0 1px}.levels button{min-height:42px;padding:4px;font-size:13px}.levels button small{font-size:8px;margin-top:3px}.home .hero-title{margin-top:8px}.home .hero-title h1{font-size:65px}.home .hero-title p{margin-top:8px}.home .home-hint{margin-top:9px}.home{overflow-y:auto}.hud b{font-size:21px}
@media(max-height:700px){.home{padding:15px 20px}.home .hero-title h1{font-size:42px}.home .hero-title p{font-size:10px;margin-top:3px}.home .eyebrow{display:none}.home .home-hint{display:none}.chapter-name{margin-top:2px}.levels{gap:3px;margin:5px 0}.levels button{min-height:38px}.home .mode-picker button{padding:8px}.home .primary{height:42px}.home .hero-title{margin-top:0}}
@media(pointer:coarse){.levels button{min-height:44px}}
@media(orientation:landscape) and (max-height:520px){.home{align-items:center}.home .hero-title{grid-column:1;grid-row:1/3}.home .home-bottom{grid-column:2;grid-row:1/3}.home .hero-title h1{font-size:65px}.chapter-name{font-size:8px}.levels button{min-height:30px}.levels button small{display:none}.home .mode-picker button{padding:5px}.home .primary{height:34px}}

@media(pointer:coarse) and (orientation:landscape) and (max-height:520px){.home .levels{max-height:120px;overflow-y:auto;overscroll-behavior:contain}.home .levels button{min-height:44px}.home .home-bottom{min-height:0;width:100%}.home .primary{flex-shrink:0}}