body{margin:0;overflow:hidden;background-color:#000}canvas{display:block}#topControls{position:fixed;top:10px;right:10px;z-index:6;display:flex;gap:8px}#topControls button{appearance:none;-webkit-appearance:none;border:1px solid rgba(255,255,255,.18);background:#1e1e1e8c;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);color:#fff;border-radius:10px;padding:8px 12px;line-height:1;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji"}#topControls button:hover{background:#282828a6}#topControls button:focus-visible{outline:2px solid rgba(122,202,255,.9);outline-offset:2px}#pauseBtn{font-size:14px;letter-spacing:.2px;min-width:80px}#pauseBtn[data-state=paused]{background:#3884ff2e;border-color:#7acaffcc}#settingsBtn{font-size:18px;padding-inline:10px}#settingsOverlay{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:#00000073;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);z-index:10}.settings-modal{width:min(92vw,420px);background:#141418d9;border:1px solid rgba(255,255,255,.1);border-radius:16px;box-shadow:0 10px 40px #00000073;color:#fff;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";overflow:hidden}.settings-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.08)}.settings-title{font-size:16px;font-weight:600}#settingsClose{appearance:none;-webkit-appearance:none;border:none;background:transparent;color:#bbb;font-size:20px;line-height:1;cursor:pointer;padding:6px;border-radius:8px}#settingsClose:hover{background:#ffffff12;color:#fff}.settings-content{padding:14px 16px 18px}.settings-section{margin-bottom:14px}.settings-section:last-child{margin-bottom:0}.section-label{display:block;margin-bottom:8px;color:#cfd3dc;font-size:13px;letter-spacing:.2px}.speed-group{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.speed-option{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 12px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:#ffffff0a;color:#e7e9ee;cursor:pointer;user-select:none;transition:background .15s ease,border-color .15s ease;text-align:center;font-size:13px}.speed-option:hover{background:#ffffff14}.speed-option input{position:absolute;opacity:0;pointer-events:none}.speed-option[data-checked=true]{border-color:#7acaffcc;background:#3884ff2e}.toggle-row{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:#ffffff0a;color:#e7e9ee;user-select:none}.toggle-row input{width:18px;height:18px}#equationsPanel{position:fixed;top:110px;right:10px;z-index:5;max-width:min(92vw,520px);max-height:46vh;overflow:auto;-webkit-overflow-scrolling:touch;padding:10px 12px;color:#fff;background:#14141459;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-radius:8px;pointer-events:auto;display:none}#equationsPanel .eq-title{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;font-size:12px;color:#cfd3dc;margin-bottom:6px;letter-spacing:.2px}#equationsPanel .eq-body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;font-size:16px;line-height:1.35}.katex{color:#fff}.katex-display{margin:0}@media (max-width: 900px){#equationsPanel{max-width:calc(100vw - 24px);right:12px}}@media (max-width: 600px){#equationsPanel{left:8px;right:8px;top:100px;max-width:calc(100vw - 16px);max-height:40vh;padding:8px 10px}#equationsPanel .eq-body{font-size:14px}}@media (max-height: 560px){#equationsPanel{max-height:36vh}}