:root{color-scheme:light;font-family:Arial,sans-serif;--ink:#0b0b0b}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden;background:#fff;color:var(--ink);font-family:Arial,sans-serif}
button{color:inherit;font:inherit}
.world,.objects,.effects,.equations{position:fixed;inset:0}
.world{isolation:isolate;background:#fff;touch-action:none}
.objects,.effects,.equations{overflow:hidden;pointer-events:none}
.objects{z-index:5}.effects{z-index:10}.equations{z-index:15}
.dock{position:fixed;z-index:50;left:50%;bottom:16px;transform:translateX(-50%);display:flex;align-items:center;gap:clamp(12px,2.2vw,30px);max-width:calc(100vw - 96px);min-height:56px;padding:8px 18px;overflow-x:auto;overflow-y:hidden;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);transition:background .18s ease,box-shadow .18s ease}
.dock.receiving{background:#f1f1f1;box-shadow:inset 0 0 0 1px #111}
.source{appearance:none;border:0;padding:5px 1px;background:transparent;cursor:grab;touch-action:none;font-family:Arial,sans-serif;font-size:27px;font-weight:400;line-height:1;transition:transform .18s ease}
.source:hover{transform:translateY(-4px)}
.source:active{cursor:grabbing;transform:scale(.92)}
.source:focus-visible{outline:1px solid #111;outline-offset:5px}
.condition-source{font-size:14px}
.separator{width:1px;height:25px;background:#d9d9d9}
.saved-items{display:flex;align-items:center;gap:clamp(10px,1.7vw,22px)}
.saved-items:empty{display:none}
.saved-source{position:relative;min-width:28px}
.trash{position:fixed;z-index:55;right:24px;bottom:21px;width:42px;height:42px;padding:9px;appearance:none;border:0;background:rgba(255,255,255,.9);cursor:default;color:#aaa;transition:color .18s ease,transform .18s ease,background .18s ease}
.trash svg{display:block;width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.35;stroke-linecap:round;stroke-linejoin:round}
.trash.receiving{color:#111;background:#f1f1f1;transform:scale(1.16)}
.trash:focus-visible{outline:1px solid #111;outline-offset:4px}
.mode-switch{position:fixed;z-index:70;top:18px;left:22px;display:flex;align-items:center;gap:8px;color:#bbb;font-size:14px;letter-spacing:.06em}
.mode-button{appearance:none;border:0;padding:7px 2px;background:transparent;cursor:pointer;color:#aaa;font-size:14px;transition:color .18s ease}
.mode-button:hover,.mode-button.active{color:#111}
.mode-button:focus-visible{outline:1px solid #111;outline-offset:4px}
.reset-progress{position:fixed;z-index:70;top:18px;right:78px;appearance:none;border:0;padding:7px 2px;background:transparent;cursor:pointer;color:#888;font-size:14px;letter-spacing:.06em;transition:color .18s ease}
.reset-progress:hover,.reset-progress.armed{color:#111}
.reset-progress:focus-visible{outline:1px solid #111;outline-offset:5px}
.achievement-toggle{position:fixed;z-index:70;top:18px;right:22px;appearance:none;border:0;padding:7px 2px;background:transparent;cursor:pointer;font-size:14px;letter-spacing:.06em}
.achievement-toggle::after{content:'';display:block;width:0;height:1px;margin:4px 0 0 auto;background:#111;transition:width .22s ease}
.achievement-toggle:hover::after,.achievement-toggle[aria-expanded="true"]::after{width:100%}
.achievement-toggle:focus-visible{outline:1px solid #111;outline-offset:5px}
.achievement-panel{position:fixed;z-index:65;top:54px;right:20px;width:min(350px,calc(100vw - 40px));max-height:calc(100vh - 130px);padding:8px 4px 10px;background:rgba(255,255,255,.94);overflow:auto;backdrop-filter:blur(12px);animation:achievement-in .22s ease-out}
.achievement-panel[hidden]{display:none}
.achievement-list{display:grid;gap:0;margin:0;padding:0;list-style:none}
.achievement-item{border-bottom:1px solid #e4e4e4;font-size:13px}
.achievement-row{display:grid;grid-template-columns:24px 1fr auto;align-items:center;gap:8px;width:100%;min-height:42px;padding:0;border:0;background:transparent;color:#111;text-align:left}
.achievement-row:not(:disabled){cursor:pointer}
.achievement-row:disabled{opacity:1}
.achievement-row:focus-visible{outline:1px solid #111;outline-offset:-2px}
.achievement-index{color:#aaa;font-size:10px;font-variant-numeric:tabular-nums}
.achievement-status{color:#8b8b8b;font-size:10px}
.achievement-item.complete .achievement-index,.achievement-item.complete .achievement-status{color:#111}
.achievement-detail{display:grid;gap:5px;padding:0 0 12px 32px;color:#777;font-size:12px;line-height:1.45}
.achievement-detail[hidden]{display:none}
.achievement-formula{color:#111;font-size:13px}
.matter{position:absolute;z-index:5;transform:translate(-50%,-50%);min-width:42px;min-height:42px;padding:4px;border:0;background:transparent;pointer-events:auto;cursor:grab;touch-action:none;user-select:none;color:var(--ink);font-family:Arial,sans-serif;font-size:31px;font-weight:400;line-height:1;text-align:center;will-change:left,top,transform;animation:matter-in .3s cubic-bezier(.17,.84,.31,1.2)}
.matter.condition{min-width:52px;font-size:15px}
.matter.atomic{font-size:29px}
.matter.dragging{z-index:30;cursor:grabbing;transform:translate(-50%,-50%) scale(1.12)}
.matter.consumed{pointer-events:none;animation:consume .24s ease-in forwards}
.matter.product{animation:product-in .48s cubic-bezier(.13,.92,.25,1.2)}
.matter.reserved{animation:slow-react .55s ease-in-out infinite alternate;pointer-events:none}
.drag-ghost{position:fixed;z-index:100;transform:translate(-50%,-50%) scale(1.08);pointer-events:none;color:var(--ink);font-family:Arial,sans-serif;font-size:31px;line-height:1}
.drag-ghost.condition{font-size:15px}
.equation-float{position:absolute;transform:translate(-50%,-50%);color:var(--ink);font-family:Arial,sans-serif;font-size:clamp(17px,2vw,23px);font-weight:400;line-height:1.25;white-space:nowrap;pointer-events:none;animation:equation-in .34s cubic-bezier(.14,.86,.25,1.16),equation-out .8s 4.2s ease-in forwards}
.equation-float.violent{animation:equation-in .25s ease-out,equation-rattle .075s .22s steps(2) 14,equation-out .8s 4.2s ease-in forwards}
.shockwave{position:absolute;width:12px;height:12px;border:2px solid #111;border-radius:50%;transform:translate(-50%,-50%);animation:shockwave .7s cubic-bezier(.08,.69,.19,1) forwards}
.flash{position:absolute;width:12px;height:12px;transform:translate(-50%,-50%);border-radius:50%;background:#111;animation:flash .38s ease-out forwards}
.shard{position:absolute;width:2px;height:23px;background:#111;transform-origin:50% 100%;animation:shard .7s cubic-bezier(.14,.65,.24,1) forwards}
.bubble{position:absolute;border:1px solid #111;border-radius:50%;animation:bubble-rise var(--duration,2.4s) cubic-bezier(.12,.54,.31,1) forwards}
.droplet{position:absolute;width:6px;height:10px;border:1px solid #111;border-radius:50% 50% 50% 0;animation:droplet-fall .9s ease-in forwards}
.heat-line{position:absolute;width:13px;height:43px;border-left:1px solid #111;border-radius:50%;animation:heat-rise 1s ease-out forwards}
.spark{position:absolute;width:3px;height:3px;background:#111;animation:spark-fly .65s ease-out forwards}
.bond-line{position:absolute;width:1px;height:48px;background:#111;transform-origin:50% 100%;animation:bond-fold .45s ease-in-out forwards}
.world.shake{animation:world-shake .5s cubic-bezier(.2,.7,.4,1)}
.world.micro-shake{animation:micro-shake .28s ease-out}
.world.thermite-shake{animation:thermite-shake 1.7s cubic-bezier(.1,.7,.22,1)}
.world.thermite-active .objects,.world.thermite-active .equations,.world.thermite-active .dock,.world.thermite-active .trash,.world.thermite-active .mode-switch,.world.thermite-active .reset-progress,.world.thermite-active .achievement-toggle,.world.thermite-active .achievement-panel{opacity:0;transition:opacity .06s linear}
.thermite-fragment{position:fixed;z-index:300;transform:translate(-50%,-50%);font-family:Arial,sans-serif;font-weight:400;white-space:nowrap;pointer-events:none}
.thermite-flash{position:fixed;left:0!important;top:0!important;width:100vw;height:100vh;background:#111;animation:thermite-flash 1.45s steps(2) forwards}
.thermite-wave{border-width:8px;animation-duration:1.25s}
.thermite-spark{height:42px;animation-duration:1.35s}
@keyframes matter-in{from{opacity:0;transform:translate(-50%,-50%) scale(.45)}}
@keyframes product-in{0%{opacity:0;transform:translate(-50%,-50%) scale(.1)}65%{transform:translate(-50%,-50%) scale(1.15)}}
@keyframes slow-react{from{opacity:1;letter-spacing:0}to{opacity:.45;letter-spacing:.08em}}
@keyframes consume{to{opacity:0;transform:translate(-50%,-50%) scale(.12)}}
@keyframes equation-in{from{opacity:0;transform:translate(-50%,-30%) scale(.9);letter-spacing:.11em}}
@keyframes equation-out{to{opacity:0;transform:translate(-50%,-90%)}}
@keyframes equation-rattle{0%{transform:translate(calc(-50% - 5px),calc(-50% + 2px)) rotate(-1deg)}50%{transform:translate(calc(-50% + 5px),calc(-50% - 2px)) rotate(1deg)}}
@keyframes shockwave{to{width:min(74vw,720px);height:min(74vw,720px);opacity:0;border-width:1px}}
@keyframes flash{to{width:310px;height:310px;opacity:0}}
@keyframes shard{to{transform:rotate(var(--angle)) translateY(-150px) scaleY(.25);opacity:0}}
@keyframes bubble-rise{0%{opacity:0;transform:scale(.5)}15%{opacity:1}100%{opacity:0;transform:translate(var(--drift),var(--rise)) scale(1.35)}}
@keyframes droplet-fall{to{opacity:0;transform:translate(var(--drift),70px) rotate(-45deg)}}
@keyframes heat-rise{to{opacity:0;transform:translate(var(--drift),-90px) scaleX(1.6)}}
@keyframes spark-fly{to{opacity:0;transform:translate(var(--x),var(--y)) scale(.2)}}
@keyframes bond-fold{to{opacity:0;transform:rotate(var(--angle)) translateY(-32px) scaleY(.25)}}
@keyframes world-shake{0%,100%{transform:none}12%{transform:translate(-11px,7px) rotate(-.3deg)}25%{transform:translate(13px,-8px) rotate(.45deg)}39%{transform:translate(-8px,-5px) rotate(-.3deg)}54%{transform:translate(7px,6px)}72%{transform:translate(-4px,2px)}}
@keyframes micro-shake{20%{transform:translate(-3px,1px)}40%{transform:translate(3px,-1px)}60%{transform:translate(-2px,2px)}}
@keyframes thermite-shake{0%,100%{transform:none}6%{transform:translate(-18px,12px) rotate(-.8deg)}12%{transform:translate(22px,-15px) rotate(1deg)}19%{transform:translate(-16px,-13px) rotate(-.6deg)}28%{transform:translate(15px,17px) rotate(.7deg)}39%{transform:translate(-12px,8px)}52%{transform:translate(10px,-9px)}68%{transform:translate(-6px,5px)}82%{transform:translate(4px,-3px)}}
@keyframes thermite-flash{0%{opacity:0}6%{opacity:1}14%{opacity:.08}22%{opacity:.92}37%{opacity:.04}55%{opacity:.35}100%{opacity:0}}
@keyframes achievement-in{from{opacity:0;transform:translateY(-7px)}}
@media(max-width:680px){.dock{width:calc(100% - 72px);left:8px;bottom:8px;transform:none;justify-content:flex-start;gap:12px;padding:7px 8px}.source{font-size:23px}.condition-source{font-size:13px}.matter{font-size:28px}.trash{right:10px;bottom:15px}.mode-switch{top:12px;left:12px}.reset-progress{top:12px;right:70px}.achievement-toggle{top:12px;right:14px}.achievement-panel{top:46px;right:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important}}