:root{--ink:#17241d;--muted:#68736b;--paper:#f2eee5;--card:#fcfaf5;--line:#d8d5ca;--green:#216b49;--lime:#b6d13e;--blue:#4f91bd;--orange:#e27b4b;--shadow:0 15px 42px rgba(31,49,38,.11);--accent:#216b49;--accent-soft:#deebe2}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--paper)}body{min-height:100vh;background-image:radial-gradient(rgba(32,73,49,.075) 1px,transparent 1px);background-size:17px 17px}button,input{font:inherit}button{color:inherit}.shell{height:100vh;min-height:650px;display:grid;grid-template-rows:65px 77px 1fr}.topbar{display:flex;align-items:center;gap:20px;padding:0 22px;border-bottom:1px solid var(--line);background:rgba(252,250,245,.95)}.brand{min-width:185px;display:flex;align-items:center;gap:10px}.brand-mark{width:35px;height:35px;display:grid;place-items:center;border-radius:50%;background:var(--ink);color:#fff;font:800 10px ui-monospace,monospace}.brand-copy{display:flex;flex-direction:column}.brand-copy b{font-size:15px;letter-spacing:.08em}.brand-copy small{font-size:7px;color:var(--muted);letter-spacing:.15em}.nav{min-width:0;flex:1;display:flex;justify-content:center;gap:4px}.nav a{padding:9px 9px;border-radius:999px;color:#7a817c;text-decoration:none;font-size:10px;white-space:nowrap;transition:.2s}.nav a span{font-family:ui-monospace,monospace;opacity:.55;margin-right:3px}.nav a:hover{background:#ebe8df;color:var(--ink)}.nav a.active{background:var(--ink);color:#fff}.offline{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:10px;white-space:nowrap}.offline i{width:7px;height:7px;border-radius:50%;background:#56a26b;box-shadow:0 0 0 4px rgba(86,162,107,.14)}
.brief{padding:11px 22px;display:grid;grid-template-columns:minmax(230px,.8fr) minmax(300px,1.2fr) auto;gap:24px;align-items:center;border-bottom:1px solid var(--line)}.eyebrow{display:block;color:var(--accent);font:800 8px ui-monospace,monospace;letter-spacing:.15em}.brief h1{margin:3px 0 0;font:700 clamp(20px,2vw,27px)/1.1 Georgia,"Songti SC",serif}.brief>p{margin:0;color:var(--muted);font-size:11px;line-height:1.55}.targets{display:flex;gap:6px;justify-content:flex-end}.target{padding:7px 8px;border:1px solid var(--line);border-radius:7px;background:rgba(255,255,255,.5);color:var(--muted);font-size:9px;white-space:nowrap;transition:.2s}.target.pass{color:#2b6a3d;background:#e2f0dc;border-color:#9cbe91}
.workspace{min-height:0;display:grid;grid-template-columns:minmax(230px,.74fr) minmax(480px,2fr) minmax(250px,.82fr);gap:11px;padding:11px}.panel{min-height:0;border:1px solid var(--line);border-radius:13px;background:rgba(252,250,245,.97);box-shadow:0 7px 22px rgba(40,56,46,.05);overflow:hidden}.controls,.evidence{padding:15px;display:flex;flex-direction:column}.panel-title{display:flex;align-items:center;justify-content:space-between}.panel-title>div{display:flex;align-items:center;gap:8px}.panel-title h2{font-size:13px;margin:0}.step{width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;color:var(--accent);font:800 8px ui-monospace,monospace}.reset{width:29px;height:29px;border:1px solid var(--line);border-radius:50%;background:transparent;cursor:pointer;font-size:17px}.reset:hover{background:#ece9df;transform:rotate(-18deg)}.control{display:block;margin-top:19px}.control-head{display:flex;justify-content:space-between;align-items:baseline;font-size:11px;font-weight:650}.control-head b{color:var(--accent);font:800 17px ui-monospace,monospace}input[type=range]{width:100%;height:4px;margin:14px 0 4px;appearance:none;border-radius:9px;background:linear-gradient(90deg,var(--accent) var(--fill),#dddcd4 var(--fill));cursor:pointer}input[type=range]::-webkit-slider-thumb{appearance:none;width:16px;height:16px;border:3px solid var(--card);border-radius:50%;background:var(--accent);box-shadow:0 0 0 1px var(--accent)}.scale{display:flex;justify-content:space-between;color:#989e99;font-size:8px}.prediction{margin-top:18px;padding:13px;border-radius:10px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 18%,var(--line))}.tiny{color:var(--accent);font:800 8px ui-monospace,monospace;letter-spacing:.1em}.prediction p{margin:6px 0 10px;font-size:10px;line-height:1.45}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}.choice{padding:6px 2px;border:1px solid #cbd1ca;border-radius:6px;background:rgba(255,255,255,.55);font-size:9px;cursor:pointer}.choice:hover,.choice.active{background:var(--accent);border-color:var(--accent);color:#fff}.prediction-note{min-height:14px;margin-top:7px;color:var(--muted);font-size:8px;line-height:1.4}.run{width:100%;margin-top:auto;padding:12px;border:0;border-radius:9px;background:var(--ink);color:#fff;cursor:pointer;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:7px}.run:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(29,40,33,.17)}.run i{font-style:normal;text-align:right}.run small{text-align:right;opacity:.45;font:7px ui-monospace,monospace}
.simulation{display:grid;grid-template-rows:37px minmax(270px,1fr) 122px}.sim-head{display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line);color:var(--muted);font:8px ui-monospace,monospace;letter-spacing:.08em}.sim-head>span:first-child{display:flex;align-items:center;gap:6px}.live{width:6px;height:6px;border-radius:50%;background:#5aa66e;box-shadow:0 0 0 3px rgba(90,166,110,.15)}.sim-head strong{font-size:15px;color:var(--ink)}.stage{position:relative;overflow:hidden;background:linear-gradient(#c8e1dc 0 62%,#ddceb0 62%)}.stage-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(34,76,52,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(34,76,52,.08) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,#000,transparent 80%)}.stage-art{position:absolute;inset:0}.stage-message{position:absolute;z-index:20;left:50%;bottom:10px;transform:translateX(-50%);padding:7px 11px;border-radius:999px;background:rgba(23,36,29,.84);color:#fff;font-size:8px;white-space:nowrap}.sensor{position:absolute;z-index:10;padding:7px 9px;border-radius:7px;background:rgba(252,250,245,.92);box-shadow:0 5px 15px rgba(35,60,45,.12);font-size:8px;color:var(--muted)}.sensor b{display:block;color:var(--ink);font:800 15px ui-monospace,monospace}.sensor-a{left:7%;bottom:8%}.sensor-b{right:7%;top:17%}.chart-wrap{padding:9px 13px 7px;border-top:1px solid var(--line);background:#f7f4ed}.chart-head{display:flex;justify-content:space-between;color:var(--muted);font-size:8px;margin-bottom:3px}.legend{display:flex;align-items:center;gap:5px}.legend i{width:12px;height:2px;margin-left:6px}.legend .a{background:var(--accent)}.legend .b{background:var(--blue)}canvas{display:block;width:100%;height:89px}
/* Irrigation */.irrigation .stage{background:linear-gradient(#c4dfd9 0 62%,#8b664b 62%)}.greenhouse{position:absolute;inset:10% 7% 0;border:2px solid rgba(35,70,53,.4);border-bottom:0;border-radius:44% 44% 0 0}.sun{position:absolute;top:13%;left:12%;width:40px;height:40px;border-radius:50%;background:#efc466;box-shadow:0 0 0 12px rgba(239,196,102,.17)}.pipe{position:absolute;z-index:7;top:20%;left:50%;width:4px;height:57px;background:#3e5548}.pipe:after{content:"";position:absolute;left:-8px;bottom:-5px;width:20px;height:8px;border-radius:4px;background:#263b30}.rain{position:absolute;z-index:6;top:35%;left:43%;width:14%;height:25%;opacity:.5;background-image:radial-gradient(#4d91bd 0 1px,transparent 2px);background-size:15px 20px;clip-path:polygon(45% 0,55% 0,100% 100%,0 100%);animation:rain .7s linear infinite}.soil{position:absolute;inset:auto 0 0;height:38%;background:linear-gradient(#956e4d,#5b4434)}.plant{position:absolute;z-index:6;bottom:30%;width:6px;height:115px;border-radius:5px;background:#3e754a;transform-origin:bottom}.plant:before,.plant:after{content:"";position:absolute;width:52px;height:24px;border-radius:100% 0 100% 0;background:#4d8b52}.plant:before{left:-48px;top:25px;transform:rotate(16deg)}.plant:after{left:2px;top:48px;transform:scaleX(-1) rotate(16deg)}.p1{left:29%}.p2{left:50%;height:135px}.p3{left:71%;height:105px}
/* Photosynthesis */.photosynthesis .stage{background:linear-gradient(#172a2f 0 62%,#294735 62%)}.photosynthesis .stage-grid{opacity:.2}.grow-light{position:absolute;top:8%;left:18%;width:64%;height:18px;border-radius:8px;background:#e8f5d9;box-shadow:0 14px 40px 12px color-mix(in srgb,var(--accent) 60%,transparent)}.light-rays{position:absolute;top:12%;left:18%;width:64%;height:55%;background:linear-gradient(90deg,transparent,rgba(194,236,157,.23),transparent);clip-path:polygon(4% 0,96% 0,78% 100%,22% 100%)}.leaf{position:absolute;left:50%;bottom:22%;width:120px;height:165px;transform:translateX(-50%)}.leaf:before,.leaf:after{content:"";position:absolute;width:90px;height:48px;border-radius:100% 0 100% 0;background:#4b9b5d;box-shadow:inset -8px -8px rgba(25,89,47,.2)}.leaf:before{left:-54px;top:38px;transform:rotate(17deg)}.leaf:after{right:-54px;top:78px;transform:scaleX(-1) rotate(16deg)}.leaf-stem{position:absolute;left:58px;bottom:0;width:5px;height:150px;background:#4d8854}.bubble{position:absolute;border:1px solid #cbeefa;border-radius:50%;color:#e2f7ff;font:8px ui-monospace,monospace;display:grid;place-items:center;animation:float 4s ease-in infinite}.bubble:nth-child(1){left:23%;bottom:26%;width:30px;height:30px}.bubble:nth-child(2){left:67%;bottom:36%;width:23px;height:23px;animation-delay:-1.2s}.bubble:nth-child(3){left:75%;bottom:18%;width:36px;height:36px;animation-delay:-2.3s}
/* Heat */.heat .stage{background:linear-gradient(#f3d4a8,#df9b70)}.heatmap{position:absolute;inset:13% 10% 8%;border:2px solid rgba(80,55,38,.35);border-radius:40% 40% 3px 3px;background:radial-gradient(circle at 52% 45%,rgba(218,67,42,.78),rgba(237,139,71,.6) 28%,rgba(93,164,157,.55) 68%);transition:.5s}.heatmap:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 24%,rgba(255,255,255,.23) 25%),repeating-linear-gradient(90deg,transparent 0 24%,rgba(255,255,255,.23) 25%)}.vent-fan{position:absolute;z-index:5;right:16%;top:24%;width:55px;height:55px;border:4px solid #41665e;border-radius:50%;animation:spin 2s linear infinite}.vent-fan:before,.vent-fan:after{content:"";position:absolute;left:22px;top:4px;width:7px;height:39px;border-radius:50%;background:#41665e}.vent-fan:after{transform:rotate(90deg)}.shade{position:absolute;z-index:4;left:13%;top:12%;width:74%;height:17px;background:repeating-linear-gradient(90deg,#e9e1c8 0 15px,#9aa997 15px 30px);transform-origin:left;transition:.4s}
/* Seed */.seed .stage{background:linear-gradient(#dde6d5,#c7d4bf)}.tray{position:absolute;inset:15% 13% 12%;display:grid;grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(3,1fr);gap:8px;padding:16px;border-radius:22px;background:#56695a;box-shadow:inset 0 0 0 7px #394c40}.seed-cell{position:relative;border-radius:50%;background:radial-gradient(#83694c,#5d4937);box-shadow:inset 0 4px 7px rgba(0,0,0,.22)}.seed-dot{position:absolute;left:50%;top:50%;width:10px;height:7px;border-radius:50%;background:#c8ab67;transform:translate(-50%,-50%) rotate(-25deg)}.seed-dot:after{content:"";position:absolute;left:5px;bottom:3px;width:3px;height:var(--sprout,0px);border-radius:3px;background:#75ad59;transform-origin:bottom;transition:.5s}.seed-dot:before{content:"";position:absolute;left:4px;bottom:calc(3px + var(--sprout,0px));width:14px;height:7px;border-radius:100% 0 100% 0;background:#86bd62;opacity:var(--leaf,0);transition:.5s}.mist{position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.35) 0 2px,transparent 3px);background-size:38px 38px;opacity:.4;animation:drift 8s linear infinite}
/* Carbon */.carbon .stage{background:linear-gradient(#a9d2cf 0 58%,#7ca65f 58% 79%,#71533d 79%)}.hills{position:absolute;bottom:21%;left:-5%;width:110%;height:35%;background:#769c5c;clip-path:polygon(0 70%,15% 35%,30% 60%,48% 20%,68% 62%,84% 28%,100% 68%,100% 100%,0 100%)}.tree{position:absolute;z-index:5;bottom:20%;width:8px;height:75px;background:#6d4c36}.tree:before{content:"";position:absolute;left:-25px;top:-29px;width:58px;height:58px;border-radius:52% 48% 55% 45%;background:#3e7950}.t1{left:17%}.t2{left:75%;transform:scale(.8)}.cow{position:absolute;z-index:7;bottom:18%;font-size:52px;filter:grayscale(.1)}.c1{left:38%}.c2{left:56%;transform:scale(.78)}.carbon-particle{position:absolute;width:26px;height:26px;border-radius:50%;background:rgba(39,57,48,.72);color:white;display:grid;place-items:center;font:7px ui-monospace,monospace;animation:float 5s ease-in infinite}.co1{left:43%;top:26%}.co2{left:58%;top:40%;animation-delay:-2s}.soil-carbon{position:absolute;left:0;right:0;bottom:0;height:21%;background:linear-gradient(#71533d,#49372d);overflow:hidden}.soil-carbon:after{content:"C  C  C    C  C    C  C  C";position:absolute;inset:18px 10%;color:#bdcf87;font:12px ui-monospace,monospace;letter-spacing:14px;opacity:.75}
/* Pollination */.pollination .stage{background:linear-gradient(#b9ddda 0 63%,#93b66c 63%)}.flowerbed{position:absolute;inset:auto 0 0;height:38%;background:linear-gradient(#83ad62,#567a45)}.flower{position:absolute;z-index:5;bottom:29%;width:5px;height:55px;background:#3e7c4c}.flower:before{content:"✿";position:absolute;left:-14px;top:-24px;font-size:31px;color:var(--flower,#efb14f);text-shadow:0 1px #fff}.f1{left:17%;--flower:#f0a452}.f2{left:31%;--flower:#e87783}.f3{left:48%;--flower:#f2d256}.f4{left:66%;--flower:#aa82cf}.f5{left:81%;--flower:#ed8f5a}.network-svg{position:absolute;inset:0;width:100%;height:100%}.network-svg line{stroke:rgba(33,107,73,.38);stroke-width:2;stroke-dasharray:5 5}.bee{position:absolute;z-index:8;font-size:25px;animation:bee 5s ease-in-out infinite}.b1{left:24%;top:30%}.b2{left:58%;top:20%;animation-delay:-1.7s}.b3{left:72%;top:44%;animation-delay:-3s}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:12px}.metric{padding:10px;border:1px solid var(--line);border-radius:9px;background:#f8f6ef}.metric.primary{grid-column:1/-1}.metric>span{display:block;color:var(--muted);font-size:8px}.metric strong{display:block;margin-top:3px;font:800 22px ui-monospace,monospace;letter-spacing:-.06em}.metric strong small{font:500 8px system-ui;color:var(--muted);margin-left:2px}.metric p{margin:3px 0 0;color:var(--muted);font-size:8px}.meter{position:relative;height:5px;margin-top:7px;border-radius:5px;background:#dddcd5;overflow:hidden}.meter i{display:block;height:100%;width:50%;background:var(--accent);transition:.35s}.explain{margin-top:11px;padding:12px;border-radius:10px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 16%,var(--line))}.explain-head{display:flex;gap:8px;align-items:center}.explain-head h2{font-size:13px;margin:0}.explain p{margin:9px 0 8px;color:#4f5e54;font-size:9px;line-height:1.55}.concept{padding:0;border:0;background:transparent;color:var(--accent);font-size:8px;font-weight:750;cursor:pointer}.score{margin-top:auto;padding:11px 13px;border-radius:10px;background:var(--ink);color:white;display:grid;grid-template-columns:1fr auto;align-items:center}.score>span{font-size:8px;color:#b7c0b9}.score strong{grid-row:1/3;grid-column:2;font:800 27px ui-monospace,monospace;color:var(--lime)}.score p{margin:3px 0 0;font-size:8px;color:#9ca69f}.score.finished{background:var(--accent);animation:pop .4s ease}
dialog{position:relative;max-width:540px;border:0;border-radius:17px;padding:26px;background:#fbf9f3;color:var(--ink);box-shadow:0 30px 90px rgba(0,0,0,.28)}dialog::backdrop{background:rgba(25,36,29,.6);backdrop-filter:blur(4px)}dialog h2{margin:6px 30px 12px 0;font:700 23px/1.2 Georgia,"Songti SC",serif}.close{position:absolute;right:16px;top:14px;width:31px;height:31px;border:1px solid var(--line);border-radius:50%;background:transparent;font-size:20px;cursor:pointer}.flow{display:flex;justify-content:space-between;align-items:center;gap:7px;margin:16px 0;padding:12px;border-radius:9px;background:var(--accent-soft)}.flow span{text-align:center;font-size:9px}.flow b{color:var(--accent)}dialog>p{font-size:11px;line-height:1.65;color:var(--muted)}.takeaway{padding:11px;border-left:3px solid var(--lime);background:#eff1de;font-size:10px;line-height:1.5}.toast{position:fixed;z-index:99;top:76px;left:50%;transform:translate(-50%,-15px);opacity:0;padding:9px 14px;border-radius:8px;background:var(--ink);color:#fff;font-size:10px;pointer-events:none;transition:.2s;box-shadow:var(--shadow)}.toast.show{opacity:1;transform:translate(-50%,0)}
.scenario{margin-top:15px;padding:11px 12px;border:1px solid color-mix(in srgb,var(--accent) 24%,var(--line));border-radius:10px;background:var(--accent-soft);position:relative;overflow:hidden}.scenario:after{content:"";position:absolute;right:-18px;top:-22px;width:65px;height:65px;border-radius:50%;background:color-mix(in srgb,var(--accent) 10%,transparent)}.scenario-top{display:flex;align-items:center;justify-content:space-between;position:relative;z-index:1}.event-pulse{display:flex;align-items:center;gap:5px;color:var(--accent);font-size:7px;font-weight:800}.event-pulse:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(226,123,75,.13);animation:pulseEvent 1.5s ease-in-out infinite}.scenario h3{margin:6px 0 2px;font:700 13px Georgia,"Songti SC",serif}.scenario p{margin:0;color:#556259;font-size:8px;line-height:1.45}.tactic-wrap{margin-top:11px}.tactic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin-top:6px}.tactic{min-width:0;padding:8px 4px;border:1px solid var(--line);border-radius:7px;background:#f8f6ef;cursor:pointer;text-align:center;transition:.18s}.tactic b{display:block;font-size:9px}.tactic small{display:block;margin-top:3px;color:var(--muted);font-size:7px;line-height:1.3}.tactic:hover{border-color:var(--accent);transform:translateY(-1px)}.tactic.active{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 5px 12px color-mix(in srgb,var(--accent) 22%,transparent)}.tactic.active small{color:rgba(255,255,255,.72)}.math-card{margin-top:10px;padding:10px;border:1px solid color-mix(in srgb,var(--accent) 18%,var(--line));border-radius:10px;background:var(--accent-soft)}.math-head,.math-head>div{display:flex;align-items:center;justify-content:space-between}.math-head>div{justify-content:flex-start;gap:7px}.math-head h2{margin:0;font-size:12px}.math-skill{padding:4px 6px;border-radius:999px;background:rgba(255,255,255,.7);color:var(--accent);font-size:7px;font-weight:800}.math-question{margin:8px 0 7px;font-size:9px;line-height:1.4}.math-options{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}.math-options button{padding:6px 2px;border:1px solid #c9d1c9;border-radius:6px;background:rgba(255,255,255,.62);font-size:9px;font-weight:700;cursor:pointer}.math-options button:hover,.math-options button.selected{border-color:var(--accent)}.math-options button.correct{background:#dcefd8;border-color:#66a36f;color:#28613b}.math-options button.wrong{background:#f5ded6;border-color:#d8866c;color:#914a34}.math-feedback{margin:6px 0 0;min-height:20px;color:var(--muted);font-size:7.5px;line-height:1.35}.math-feedback.success{color:#2f6f42}.math-feedback.error{color:#9a5138}.science-note{margin:5px 0 4px;padding-top:5px;border-top:1px solid rgba(80,100,86,.14);color:#4f5e54;font-size:7.5px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
@keyframes rain{to{background-position:0 20px}}@keyframes float{50%{transform:translateY(-35px);opacity:.45}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes drift{to{background-position:38px 38px}}@keyframes bee{50%{transform:translate(80px,35px) rotate(12deg)}}@keyframes pop{50%{transform:scale(1.025)}}@keyframes pulseEvent{50%{box-shadow:0 0 0 7px rgba(226,123,75,0)}}
@media(max-width:1100px){.topbar{gap:9px}.nav a{padding:8px 6px}.nav a span{display:none}.offline{display:none}.brief{grid-template-columns:220px 1fr}.targets{grid-column:1/-1;justify-content:flex-start}.workspace{grid-template-columns:215px minmax(430px,1.6fr) 240px}.controls,.evidence{padding:12px}}
@media(max-width:850px){.shell{height:auto;min-height:100vh;display:block}.topbar{min-height:65px;padding:9px 13px;flex-wrap:wrap}.brand{min-width:auto}.nav{order:3;flex-basis:100%;justify-content:flex-start;overflow-x:auto}.brief{grid-template-columns:1fr;padding:13px;gap:7px}.targets{grid-column:auto;overflow-x:auto;justify-content:flex-start}.workspace{display:flex;flex-direction:column;padding:8px}.simulation{min-height:590px}.stage{min-height:330px}.controls,.evidence{min-height:470px}.metric-grid{grid-template-columns:repeat(4,1fr)}.metric.primary{grid-column:auto}.run{margin-top:16px}}
@media(max-width:560px){.nav a{font-size:9px}.brief>p{font-size:10px}.metric-grid{grid-template-columns:1fr 1fr}.metric.primary{grid-column:1/-1}.simulation{min-height:560px}.stage-message{max-width:90%;white-space:normal;text-align:center}.flow span{writing-mode:vertical-lr}}
.brand{color:inherit;text-decoration:none}.nav a.math-station{border:1px solid #d2d5a9;background:#f0f1d9;color:#5b6e35}.nav a.math-station:hover{border-color:#8da052;background:#e8edc4}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important}}