:root{--cream: #FAF6F0;--stone: #EDE8E0;--sand: #D8D0C4;--bark: #2C2418;--walnut: #4A3C2C;--sage: #5B7553;--sage-light: #7A9A70;--sage-dark: #3E5438;--terracotta: #B86B42;--terra-light: #D4895E;--copper: #A0522D;--gold: #B8923A;--gold-light: #D4B06A;--moss: #6B7F5E;--parchment: #F5F0E8;--font-serif: "Crimson Pro", Georgia, "Times New Roman", serif;--font-sans: "Source Sans 3", "Segoe UI", Roboto, sans-serif;--ease: cubic-bezier(.4, 0, .2, 1);--header-h: 64px;--focus-ring: 0 0 0 3px rgba(91, 117, 83, .25);--card-border: 1px solid rgba(44, 36, 24, .06);--card-shadow: 0 4px 16px rgba(44, 36, 24, .06)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);color:var(--bark);background:var(--cream);line-height:1.7;-webkit-font-smoothing:antialiased}img,svg,canvas{max-width:100%;display:block}a{color:var(--sage);text-decoration:none;transition:color .2s var(--ease)}a:hover{color:var(--terracotta)}button{font-family:inherit;cursor:pointer}:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:4px}.sim-header{position:sticky;top:0;z-index:100;height:var(--header-h);background:#faf6f0eb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--sand)}.sim-header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:1400px;margin:0 auto;height:100%;padding:0 20px}.sim-logo{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-serif);font-size:1.15rem;font-weight:600;color:var(--bark);white-space:nowrap}.sim-logo-icon{font-size:1.3rem;color:var(--sage)}.sim-logo:hover{color:var(--bark)}.sim-breadcrumb{font-family:var(--font-sans);font-size:.9rem;color:var(--walnut);flex:1;text-align:center}.sim-breadcrumb a{color:var(--walnut);border-bottom:1px solid transparent}.sim-breadcrumb a:hover{color:var(--sage);border-bottom-color:var(--sage)}.sim-breadcrumb-sep{margin:0 10px;color:var(--sand)}.sim-book{color:var(--terracotta);font-weight:600;font-size:.92rem;white-space:nowrap}.sim-book:hover{color:var(--copper)}@media (max-width: 640px){.sim-breadcrumb{display:none}}.sim-footer{background:var(--bark);color:#ffffffb3;padding:40px 0 28px;margin-top:80px}.sim-footer .container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}.sim-footer-brand{display:flex;flex-direction:column;align-items:center;gap:4px}.sim-footer-brand .sim-logo-icon{font-size:1.8rem;color:var(--sage-light)}.sim-footer-brand strong{font-family:var(--font-serif);font-size:1.15rem;color:#fff;font-weight:600}.sim-footer-brand p{font-size:.85rem}.sim-footer-links{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}.sim-footer-links a{font-size:.85rem;color:#ffffff8c}.sim-footer-links a:hover{color:var(--gold-light)}.sim-footer-copy{font-size:.8rem;color:#ffffff59}.sim-footer-tagline{font-style:italic;font-size:.82rem;color:var(--moss)}.container{max-width:1200px;margin:0 auto;padding:0 24px}.container-wide{max-width:1400px;margin:0 auto;padding:0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;min-height:44px;font-family:var(--font-sans);font-size:.95rem;font-weight:600;border:none;border-radius:6px;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease);text-decoration:none;line-height:1}.btn-primary{background:var(--sage);color:#fff}.btn-primary:hover{background:var(--sage-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 16px #5b75534d}.btn-cta{background:var(--terracotta);color:#fff}.btn-cta:hover{background:var(--copper);color:#fff;transform:translateY(-1px);box-shadow:0 4px 16px #b86b424d}.btn-ghost{background:transparent;color:var(--sage);border:2px solid var(--sage)}.btn-ghost:hover{background:var(--sage);color:#fff}.btn-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:1px solid var(--sand);background:var(--cream);color:var(--walnut);font-size:1.1rem;transition:all .2s var(--ease)}.btn-icon:hover{background:var(--stone);color:var(--bark);border-color:var(--walnut)}.btn-icon svg{width:20px;height:20px}h1,h2,h3,h4{font-family:var(--font-serif);color:var(--bark);font-weight:600;line-height:1.2}h1{font-size:2.4rem}h2{font-size:1.9rem}h3{font-size:1.3rem}h4{font-size:1.1rem}p{margin-bottom:.8em}.eyebrow{font-family:var(--font-sans);font-size:.78rem;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--terracotta);margin-bottom:10px}.chip{display:inline-flex;align-items:center;padding:3px 10px;background:var(--sage);color:#fff;border-radius:4px;font-size:.72rem;font-weight:600;letter-spacing:1px;text-transform:uppercase}.chip-alt{background:var(--terracotta)}.chip-ghost{background:transparent;color:var(--walnut);border:1px solid var(--sand)}.sim-titlebar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:20px 0 18px;border-bottom:1px solid var(--sand);margin-bottom:20px}.sim-titlebar-text h1{font-size:1.8rem;margin-bottom:2px;line-height:1.15}.sim-titlebar-text .sim-tagline{font-size:.95rem;color:var(--walnut);font-style:italic}.sim-titlebar-actions{display:flex;gap:8px;flex-shrink:0}.panel{background:var(--parchment);border:var(--card-border);border-radius:12px;padding:20px;box-shadow:var(--card-shadow)}.panel h2,.panel h3{font-family:var(--font-serif);color:var(--bark)}.panel h3{font-size:1.1rem;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--sand)}.sim-layout{display:grid;grid-template-columns:300px 1fr 300px;gap:20px;min-height:calc(100vh - var(--header-h) - 160px);padding-bottom:40px}.sim-layout .sim-controls{grid-column:1}.sim-layout .sim-canvas-wrap{grid-column:2}.sim-layout .sim-readouts{grid-column:3}@media (max-width: 1100px){.sim-layout{grid-template-columns:1fr 1fr}.sim-layout .sim-controls,.sim-layout .sim-canvas-wrap,.sim-layout .sim-readouts{grid-column:1 / -1}}.sim-canvas-wrap{background:var(--cream);border:var(--card-border);border-radius:12px;padding:12px;display:flex;flex-direction:column;min-height:480px}.sim-canvas{width:100%;height:100%;flex:1;min-height:440px;border-radius:8px;touch-action:none}.ui-group{margin-bottom:16px}.ui-label{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:.85rem;font-weight:600;color:var(--bark);margin-bottom:6px}.ui-label .ui-value{font-family:var(--font-serif);font-size:.95rem;color:var(--sage-dark);font-weight:600}.ui-help{display:block;font-size:.78rem;color:var(--walnut);margin-top:4px;font-style:italic}.ui-slider{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:4px;background:var(--sand);outline:none;cursor:pointer;touch-action:manipulation}.ui-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:22px;height:22px;border-radius:50%;background:var(--sage);border:2px solid var(--cream);box-shadow:0 1px 4px #2c241826;cursor:pointer;transition:background .2s var(--ease),transform .15s var(--ease)}.ui-slider::-webkit-slider-thumb:hover{background:var(--sage-dark);transform:scale(1.1)}.ui-slider::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--sage);border:2px solid var(--cream);cursor:pointer}.ui-slider:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 4px #5b75534d}.ui-select{width:100%;min-height:44px;padding:10px 14px;font-family:var(--font-sans);font-size:.92rem;color:var(--bark);background:var(--cream);border:1px solid var(--sand);border-radius:6px;outline:none;cursor:pointer;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.ui-select:focus{border-color:var(--sage);box-shadow:var(--focus-ring)}.ui-toggle-row{display:flex;gap:6px;background:var(--cream);padding:4px;border-radius:8px;border:1px solid var(--sand)}.ui-toggle-row button{flex:1;min-height:36px;padding:6px 10px;font-size:.82rem;font-weight:600;background:transparent;color:var(--walnut);border:none;border-radius:6px;cursor:pointer;transition:all .2s var(--ease)}.ui-toggle-row button.active{background:var(--sage);color:#fff}.ui-toggle-row button:not(.active):hover{background:var(--stone);color:var(--bark)}.ui-switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer;user-select:none;min-height:44px}.ui-switch input{position:absolute;opacity:0;pointer-events:none}.ui-switch .ui-switch-track{position:relative;width:40px;height:22px;background:var(--sand);border-radius:12px;transition:background .2s var(--ease);flex-shrink:0}.ui-switch .ui-switch-thumb{position:absolute;top:2px;left:2px;width:18px;height:18px;background:var(--cream);border-radius:50%;transition:transform .2s var(--ease);box-shadow:0 1px 3px #0003}.ui-switch input:checked~.ui-switch-track{background:var(--sage)}.ui-switch input:checked~.ui-switch-track .ui-switch-thumb{transform:translate(18px)}.ui-switch-label{font-size:.9rem;color:var(--bark)}.ui-play-controls{display:flex;gap:8px;justify-content:center;margin-top:12px;padding-top:12px;border-top:1px solid var(--sand)}.ui-play-controls .btn-icon{width:48px;height:48px}.readout-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:6px 0;border-bottom:1px dashed rgba(44,36,24,.08);font-size:.92rem}.readout-row:last-child{border-bottom:none}.readout-row .readout-label{color:var(--walnut)}.readout-row .readout-value{font-family:var(--font-serif);font-weight:600;font-size:1rem;color:var(--bark)}.help-overlay{position:fixed;inset:0;background:#2c24188c;backdrop-filter:blur(3px);z-index:200;opacity:0;pointer-events:none;transition:opacity .25s var(--ease)}.help-overlay.open{opacity:1;pointer-events:auto}.help-panel{position:fixed;top:0;right:-480px;width:100%;max-width:460px;height:100vh;background:var(--cream);box-shadow:-8px 0 40px #2c241840;z-index:210;transition:right .3s var(--ease);overflow-y:auto;padding:28px 28px 40px}.help-panel.open{right:0}.help-panel h2{font-size:1.5rem;margin-bottom:16px}.help-panel h3{font-size:1.05rem;margin-top:20px;margin-bottom:8px}.help-panel p{font-size:.95rem;color:var(--walnut);margin-bottom:10px}.help-panel ul{padding-left:20px;margin-bottom:14px;font-size:.92rem;color:var(--walnut)}.help-panel li{margin-bottom:4px}.help-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;border:1px solid var(--sand);background:var(--cream);font-size:1.2rem;color:var(--walnut);display:inline-flex;align-items:center;justify-content:center}.spec-links{background:var(--parchment);border:1px solid var(--sand);border-radius:8px;padding:12px 16px;margin-top:16px;font-size:.88rem}.spec-links summary{cursor:pointer;font-weight:600;color:var(--bark);padding:2px 0}.spec-links ul{padding-left:18px;margin-top:8px}.spec-links code{background:var(--stone);padding:1px 4px;border-radius:3px;font-size:.82rem}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%) translateY(20px);background:var(--bark);color:#fff;padding:10px 20px;border-radius:20px;font-size:.9rem;opacity:0;pointer-events:none;transition:opacity .25s var(--ease),transform .25s var(--ease);z-index:300}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.sim-hero{position:relative;min-height:68vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#1a2e1a,#2a3f28,#1e3028 60%,#162418);overflow:hidden;padding:80px 24px;text-align:center}.sim-hero-content{max-width:760px;position:relative;z-index:2}.sim-hero h1{font-family:var(--font-serif);font-size:4rem;font-weight:300;color:#fff;line-height:1.1;margin-bottom:14px;letter-spacing:-1px}.sim-hero h1 em{font-style:italic;font-weight:400;color:var(--gold-light)}.sim-hero-sub{font-size:1rem;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--terra-light);margin-bottom:24px}.sim-hero-desc{font-size:1.1rem;color:#fffc;line-height:1.8;font-weight:300;margin:0 auto;max-width:620px}.sim-grid-section{padding:80px 0}.sim-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}@media (max-width: 1024px){.sim-cards{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.sim-cards{grid-template-columns:1fr}.sim-hero h1{font-size:2.6rem}}.sim-card{display:flex;flex-direction:column;background:var(--cream);border:var(--card-border);border-radius:12px;overflow:hidden;transition:transform .25s var(--ease),box-shadow .25s var(--ease);text-decoration:none;color:var(--bark)}.sim-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px #2c24181a;color:var(--bark)}.sim-card-thumb{aspect-ratio:16 / 9;background:var(--parchment);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--sand);overflow:hidden}.sim-card-thumb svg{width:100%;height:100%}.sim-card-body{padding:20px 22px 22px}.sim-card-body h3{font-size:1.3rem;margin-bottom:8px}.sim-card-body p{font-size:.92rem;color:var(--walnut);margin-bottom:14px}.sim-card-tags{display:flex;gap:6px;flex-wrap:wrap}.sim-cta-block{text-align:center;padding:60px 24px 20px;max-width:760px;margin:0 auto}.sim-cta-block p{font-size:1.05rem;color:var(--walnut);margin-bottom:22px}.about-wrap{max-width:760px;margin:60px auto;padding:0 24px}.about-wrap h1{margin-bottom:10px}.about-wrap .eyebrow{margin-bottom:14px}.about-wrap p{font-size:1.05rem;color:var(--walnut);margin-bottom:18px}