:root{--bg:#fdf8ee;--bg-alt:#f5eeda;--panel:#fff;--ink:#3a3226;--ink-soft:#6b6153;--brand:#5b8a72;--brand-dark:#3f6a55;--accent:#e8985e;--accent-2:#6fa8dc;--accent-pink:#e08a9b;--hotspot:#ef7d3a;--hotspot-ring:#ef7d3a59;--line:#d8cdb2;--shadow:0 6px 18px #503c141f;--radius:16px;--radius-sm:10px;--font-body:"Quicksand", system-ui, sans-serif;--font-head:"Baloo 2", system-ui, sans-serif;--header-h:64px;--sidebar-w:250px;--fz-scale:1;--transition:.25s ease}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-body);background:var(--bg);color:var(--ink);font-size:calc(16px * var(--fz-scale));-webkit-font-smoothing:antialiased;line-height:1.5}h1,h2,h3,h4{font-family:var(--font-head);color:var(--brand-dark);margin:0 0 .4em}a{color:var(--brand-dark)}button{cursor:pointer;font-family:inherit}img{max-width:100%;display:block}.skip-link{background:var(--brand);color:#fff;z-index:999;border-radius:0 0 8px;padding:10px 16px;position:absolute;top:0;left:-999px}.skip-link:focus{left:0}#app-shell{flex-direction:column;min-height:100vh;display:flex}#site-header{height:var(--header-h);background:linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);color:#fff;z-index:60;box-shadow:var(--shadow);align-items:center;gap:14px;padding:0 16px;display:flex;position:sticky;top:0}.header-left{flex:none;align-items:center;gap:10px;display:flex}.header-center{flex:auto;justify-content:center;min-width:0;display:flex}.header-right{flex:none;align-items:center;gap:8px;display:flex}.brand{color:#fff;align-items:center;gap:8px;text-decoration:none;display:flex}.brand-icon{font-size:1.6rem}.brand-title{font-family:var(--font-head);font-size:1.05rem;font-weight:700}.icon-btn{color:#fff;width:40px;height:40px;transition:background var(--transition);background:#ffffff26;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:1rem;display:flex}.icon-btn:hover,.icon-btn:focus-visible{background:#ffffff4d}.search-wrap{width:100%;max-width:420px;position:relative}.search-icon{color:var(--ink-soft);position:absolute;top:50%;left:14px;transform:translateY(-50%)}#search-input{width:100%;color:var(--ink);background:#fff;border:none;border-radius:999px;outline:none;padding:10px 14px 10px 38px;font-size:.95rem}#search-input:focus-visible{box-shadow:0 0 0 3px #fff8}.search-results{color:var(--ink);border-radius:var(--radius-sm);box-shadow:var(--shadow);z-index:80;background:#fff;max-height:320px;position:absolute;top:calc(100% + 6px);left:0;right:0;overflow:auto}.search-results button{text-align:left;width:100%;color:var(--ink);background:0 0;border:none;align-items:center;gap:10px;padding:10px 14px;font-size:.95rem;display:flex}.search-results button:hover,.search-results button.active{background:var(--bg-alt)}.search-results .sr-icon{color:var(--brand);text-align:center;width:20px}.search-results .sr-empty{color:var(--ink-soft);padding:12px 14px;font-style:italic}.pill-btn{color:#fff;transition:background var(--transition);background:#ffffff2e;border:none;border-radius:999px;align-items:center;gap:7px;padding:9px 16px;font-size:.9rem;font-weight:600;display:flex}.pill-btn:hover,.pill-btn:focus-visible{background:#ffffff52}.pill-btn[aria-pressed=true]{background:var(--accent);color:#3a2a10}.pill-btn.small{padding:5px 12px;font-size:.8rem}.lang-toggle{background:#ffffff26;border-radius:999px;padding:3px;display:flex}.lang-btn{color:#fff;opacity:.7;background:0 0;border:none;border-radius:999px;padding:6px 12px;font-size:.8rem;font-weight:700}.lang-btn.active{color:var(--brand-dark);opacity:1;background:#fff}.a11y-menu{top:var(--header-h);color:var(--ink);border-radius:var(--radius-sm);box-shadow:var(--shadow);z-index:90;background:#fff;flex-direction:column;gap:4px;width:200px;padding:10px;display:flex;position:absolute;right:16px}.a11y-menu[hidden]{display:none}.a11y-heading{color:var(--brand-dark);margin:2px 6px 6px;font-size:.85rem;font-weight:700}.a11y-menu button{text-align:left;background:0 0;border:none;border-radius:8px;align-items:center;gap:8px;padding:8px 10px;font-size:.88rem;display:flex}.a11y-menu button:hover{background:var(--bg-alt)}#app-body{flex:1;align-items:stretch;display:flex}#sidebar{width:var(--sidebar-w);flex:0 0 var(--sidebar-w);background:var(--panel);border-right:1px solid var(--line);top:var(--header-h);height:calc(100vh - var(--header-h));z-index:40;transition:margin-left var(--transition);flex-direction:column;display:flex;position:sticky;overflow-y:auto}#nav-list{flex:1;margin:0;padding:10px;list-style:none}#nav-list li{margin-bottom:2px}.nav-link{border-radius:var(--radius-sm);color:var(--ink);align-items:center;gap:10px;padding:10px 12px;font-size:.92rem;font-weight:600;text-decoration:none;display:flex}.nav-link i{text-align:center;width:20px;color:var(--brand)}.nav-link:hover{background:var(--bg-alt)}.nav-link.active{background:var(--brand);color:#fff}.nav-link.active i{color:#fff}.nav-children{border-left:2px dashed var(--line);margin:2px 0 6px 26px;padding:0;list-style:none}.nav-children .nav-link{padding:6px 10px;font-size:.84rem;font-weight:500}.sidebar-footer{border-top:1px solid var(--line);flex-direction:column;gap:8px;padding:12px;display:flex}.download-link{border-radius:var(--radius-sm);background:var(--bg-alt);color:var(--brand-dark);align-items:center;gap:8px;padding:9px 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12px}.brand-title{display:none}#main-content{padding:14px}}.page-header{margin-bottom:14px}.page-eyebrow{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);font-size:.75rem;font-weight:700}.page-title{margin:2px 0 6px;font-size:clamp(1.5rem,3vw,2.1rem)}.page-desc{color:var(--ink-soft);max-width:760px;font-size:1rem}.stage-wrap{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:22px;padding:18px;position:relative}.stage{border-radius:var(--radius-sm);background:radial-gradient(#fffef8 0%,#f2e9d3 100%);width:100%;max-width:1100px;margin:0 auto;position:relative;overflow:hidden}.stage-img-box{width:100%;position:relative}.stage-img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;width:100%;height:auto;transition:transform .5s cubic-bezier(.2,.8,.2,1);display:block}.stage.zoomed .stage-img{transform:scale(1.35)}.stage-svg{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.stage-vignette:after{content:"";pointer-events:none;position:absolute;inset:0;box-shadow:inset 0 0 120px 40px #3c2d142e}.hotspot-dot{background:var(--hotspot);width:26px;height:26px;box-shadow:0 2px 8px #00000040, 0 0 0 6px var(--hotspot-ring);cursor:pointer;pointer-events:auto;transition:transform var(--transition), box-shadow var(--transition);border:3px solid #fff;border-radius:50%;margin:-13px 0 0 -13px;animation:2.4s ease-in-out infinite pulse;position:absolute}.hotspot-dot:after{content:"";background:#fff;border-radius:50%;position:absolute;inset:6px}.hotspot-dot:hover,.hotspot-dot:focus-visible{box-shadow:0 2px 10px #0000004d, 0 0 0 9px var(--hotspot-ring);transform:scale(1.25)}.hotspot-dot.correct{background:#4caf7d;animation:none}.hotspot-dot.wrong{background:#d9534f;animation:none}.hotspot-dot.linked:before{content:"";color:var(--hotspot);font-family:"Font Awesome 6 Free";font-size:9px;font-weight:900;position:absolute;top:-16px;left:50%;transform:translate(-50%)}@keyframes pulse{0%,to{box-shadow:0 2px 8px #00000040, 0 0 0 6px var(--hotspot-ring)}50%{box-shadow:0 2px 8px #00000040,0 0 0 11px #0000}}.hotspot-label{color:var(--ink);white-space:nowrap;box-shadow:var(--shadow);border:1.5px solid var(--brand);pointer-events:none;opacity:0;transition:opacity var(--transition);background:#fff;border-radius:999px;margin-top:-22px;padding:4px 10px;font-size:.72rem;font-weight:700;position:absolute;transform:translate(-50%,-100%)}.stage.show-labels .hotspot-label{opacity:1}.quiz-mode .hotspot-label{display:none!important}.leader-line{stroke:var(--brand);stroke-width:1.6px;stroke-dasharray:4 3;fill:none;opacity:.75}.hotspot-dot.highlight{animation:1s ease-in-out 2 highlightPulse}@keyframes highlightPulse{0%,to{transform:scale(1)}50%{transform:scale(1.5)}}#tooltip{background:var(--panel);max-width:280px;color:var(--ink);border-radius:var(--radius-sm);box-shadow:var(--shadow);z-index:200;border:2px solid var(--brand);pointer-events:none;padding:12px 14px;font-size:.88rem;position:fixed}#tooltip h4{color:var(--brand-dark);margin:0 0 4px;font-size:.95rem}#tooltip .tt-cat{text-transform:uppercase;color:var(--accent);letter-spacing:.05em;font-size:.7rem;font-weight:700}.info-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;display:grid}.card{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}.card h3{align-items:center;gap:8px;font-size:1.05rem;display:flex}.card h3 i{color:var(--accent)}.card p{color:var(--ink-soft);margin:0}.vocab-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.vocab-list li{border-left:3px solid var(--accent-2);padding-left:10px}.vocab-term{color:var(--brand-dark);font-weight:700}.vocab-def{color:var(--ink-soft);font-size:.9rem}.quiz-card{border:2px dashed var(--accent);background:linear-gradient(135deg,#fff6ea,#fdeee0)}.quiz-question{margin-bottom:8px;font-weight:700}.quiz-feedback{margin-top:10px;font-weight:700}.quiz-feedback.correct{color:#3f8a5c}.quiz-feedback.wrong{color:#c0463d}.subparts-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin-top:10px;display:grid}.subpart-card{background:var(--panel);border-radius:var(--radius-sm);box-shadow:var(--shadow);text-align:center;color:var(--ink);transition:transform var(--transition);padding:14px;text-decoration:none}.subpart-card:hover{transform:translateY(-4px)}.subpart-card img{object-fit:contain;width:60px;height:60px;margin:0 auto 8px}.subpart-card span{color:var(--brand-dark);font-size:.85rem;font-weight:700}#quiz-bar{background:var(--accent);color:#3a2a10;border-radius:var(--radius-sm);margin-bottom:14px}.quiz-bar-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;font-weight:700;display:flex}#toast{background:var(--brand-dark);color:#fff;box-shadow:var(--shadow);z-index:300;border-radius:999px;align-items:center;gap:8px;padding:12px 22px;font-weight:700;display:flex;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}#toast[hidden]{display:none}#toast.wrong{background:#c0463d}html[data-contrast=high]{--bg:#000;--bg-alt:#111;--panel:#0d0d0d;--ink:#fff;--ink-soft:#ddd;--brand:#ffd166;--brand-dark:#ffd166;--line:#555;--accent:#7fffd4;--hotspot:#ff4d4d;--hotspot-ring:#ff4d4d80}html[data-contrast=high] .nav-link.active{color:#000;background:#ffd166}html[data-contrast=high] .hotspot-label{color:#fff;background:#000;border-color:#ffd166}html[data-contrast=high] #site-header{background:#000;border-bottom:2px solid #ffd166}html[data-contrast=high] .lang-btn.active{color:#000;background:#ffd166}html[data-contrast=high] a{color:#7fffd4}a:focus-visible,button:focus-visible,input:focus-visible,.hotspot-dot:focus-visible{outline:3px solid var(--accent-2);outline-offset:2px}.visually-hidden{clip:rect(0 0 0 0);width:1px;height:1px;overflow:hidden;position:absolute!important}