:root{--bg: #0f172a;--panel: #1e293b;--panel-2: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #38bdf8;--accent-2: #0284c7;--danger: #ef4444;--success: #22c55e;--warn: #f59e0b;--border: #334155;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}button{background:var(--accent-2);color:#fff;border:0;border-radius:6px;padding:10px 18px;cursor:pointer;font:inherit;font-size:14px}button:hover{filter:brightness(1.15)}button.secondary{background:var(--panel-2)}button.danger{background:var(--danger)}button[disabled]{opacity:.5;cursor:not-allowed}input,select{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:8px 10px;font:inherit;width:100%}label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}.app{display:flex;flex-direction:column;min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--panel);border-bottom:1px solid var(--border);flex-shrink:0}.topbar h1{font-size:18px;margin:0}.topbar .right{display:flex;gap:12px;align-items:center}.main{flex:1;padding:24px 20px;max-width:860px;width:100%;margin:0 auto}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:14px}.card:hover{background:var(--panel-2)}.card h3{margin:0 0 4px;font-size:16px}.muted{color:var(--muted);font-size:13px}.empty{padding:60px 24px;text-align:center;color:var(--muted)}.error-banner{background:var(--danger);color:#fff;padding:10px 14px;border-radius:6px;margin-bottom:12px}.runner{display:flex;flex-direction:column;height:100vh;overflow:hidden}.runner.below-threshold{box-shadow:inset 0 0 0 4px var(--danger)}.runner-topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border);flex-shrink:0}.mode-pill{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:4px 10px;border-radius:20px;color:#fff;white-space:nowrap}.progress-bar-wrap{flex:1;height:6px;background:var(--panel-2);border-radius:3px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent);border-radius:3px;transition:width .4s ease}.progress-label{font-size:13px;color:var(--muted);white-space:nowrap;min-width:40px;text-align:right}.corrective-banner{background:#2d1f00;border-bottom:1px solid #f59e0b44;color:var(--warn);font-size:13px;padding:7px 16px;flex-shrink:0}.stage-wrap{flex:1;position:relative;background:#07111f;display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:crosshair;min-height:0}.stage-img{max-width:100%;max-height:100%;display:block;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.region-overlay{position:absolute;border:2px solid var(--success);border-radius:4px;pointer-events:none;background:#22c55e1f;animation:pulse-region 1.8s ease-in-out infinite}@keyframes pulse-region{0%,to{box-shadow:0 0 #22c55e80}50%{box-shadow:0 0 0 10px #22c55e00}}.region-hover-overlay{position:absolute;border:2px solid rgba(148,163,184,.85);border-radius:4px;pointer-events:none;background:#94a3b847;overflow:hidden}.region-hover-overlay:after{content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;animation:hover-dwell-fill var(--hover-dwell-ms, .5s) linear forwards}@keyframes hover-dwell-fill{to{transform:scaleX(1)}}.text-region{position:absolute;box-sizing:border-box;border:2px solid;border-radius:6px;padding:8px 10px;overflow:hidden;white-space:pre-wrap;line-height:1.4;pointer-events:none}.text-region.shadow{box-shadow:0 8px 24px #00000059}.input-region-field{position:absolute;background:transparent;border:2px solid transparent;border-radius:4px;color:#0f172a;padding:0 8px;font-size:14px;transition:background .15s ease,border-color .15s ease}.input-region-field:hover{border-color:#38bdf880}.input-region-field:focus{outline:none;background:#fffffff2;border-color:var(--accent)}.input-region-field.instruction-typing{background:#fffffff2;border-color:var(--accent);color:#0f172a;display:flex;align-items:center;white-space:nowrap;overflow:hidden}.typing-caret{display:inline-block;width:2px;height:1.1em;margin-left:2px;background:#0f172a;animation:caret-blink .8s steps(1) infinite}@keyframes caret-blink{50%{opacity:0}}.input-region-confirm{position:absolute;width:30px;padding:0;background:var(--success);border-radius:4px;font-size:14px;line-height:1}.feedback-balloon{position:absolute;left:50%;transform:translate(-50%);max-width:min(560px,90%);display:flex;align-items:center;gap:12px;background:var(--panel);border:2px solid var(--border);border-radius:14px;padding:14px 20px;box-shadow:0 10px 30px #00000073;z-index:20;animation:balloon-in .18s ease-out;pointer-events:none}.feedback-balloon.top{top:20px}.feedback-balloon.bottom{bottom:20px}.feedback-balloon.error{border-color:var(--danger)}.feedback-balloon.warn{border-color:var(--warn)}.feedback-balloon.ok{border-color:var(--success)}.feedback-balloon .feedback-icon{font-size:22px;flex-shrink:0;line-height:1}.feedback-balloon-text{font-size:17px;line-height:1.4}@keyframes balloon-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}.subtitle-bar{display:flex;align-items:center;gap:14px;padding:16px 20px;background:var(--panel);border-bottom:2px solid var(--border);flex-shrink:0;min-height:72px;transition:background .2s,border-color .2s}.subtitle-bar.feedback-error{background:#3b0e0e;border-top-color:var(--danger)}.subtitle-bar.feedback-warn{background:#2d1f00;border-top-color:var(--warn)}.subtitle-bar.feedback-ok{background:#0d2e1a;border-top-color:var(--success)}.feedback-icon{font-size:22px;width:32px;text-align:center;flex-shrink:0;line-height:1}.subtitle-text{flex:1;font-size:17px;line-height:1.5}.virtual-cursor{position:absolute;width:34px;height:34px;pointer-events:none;transition:left .7s cubic-bezier(.4,0,.2,1),top .7s cubic-bezier(.4,0,.2,1);z-index:10;background:none}.virtual-cursor:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--accent);clip-path:polygon(0% 0%,0% 100%,25% 75%,40% 100%,55% 93%,40% 68%,70% 68%);filter:drop-shadow(1px 0 0 #0f172a) drop-shadow(-1px 0 0 #0f172a) drop-shadow(0 1px 0 #0f172a) drop-shadow(0 -1px 0 #0f172a) drop-shadow(0 0 6px var(--accent))}.virtual-cursor.clicking:after{content:"";position:absolute;top:0;left:0;transform:translate(-50%,-50%);width:40px;height:40px;border-radius:50%;background:#38bdf859;animation:cursor-click .4s ease-out forwards}@keyframes cursor-click{0%{width:0;height:0;opacity:1}to{width:56px;height:56px;opacity:0}}.click-type-badge{position:absolute;z-index:11;pointer-events:none;background:#0f172ad9;color:#fff;border:1px solid var(--accent);border-radius:5px;padding:2px 8px;font-size:12px;font-weight:600;white-space:nowrap;animation:badge-fade-in .15s ease-out}@keyframes badge-fade-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.zoom-warning{display:flex;align-items:center;gap:12px;padding:8px 16px;background:#f59e0b26;border-bottom:1px solid var(--warn);color:var(--text);font-size:13px}.zoom-warning button{margin-left:auto;padding:2px 10px;font-size:15px;line-height:1}.hover-focus-hint{position:absolute;right:10px;top:10px;z-index:15;background:#0f172ad9;color:#e2e8f0;border:1px solid rgba(148,163,184,.4);border-radius:6px;padding:5px 10px;font-size:12px;pointer-events:none}.pause-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:96px;height:96px;display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff;background:#0f172aa6;border:2px solid rgba(255,255,255,.8);border-radius:50%;pointer-events:none;z-index:30}.pause-overlay.play-flash{animation:pause-flash-out .8s ease-out forwards}@keyframes pause-flash-out{0%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-50%) scale(1.15)}}.instruction-nav{position:relative}.step-jump-panel{position:absolute;top:calc(100% + 6px);left:0;background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px #0006;max-height:340px;min-width:280px;overflow-y:auto;z-index:40;padding:6px}.step-jump-item{padding:8px 10px;border-radius:6px;font-size:13px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:360px}.step-jump-item:hover{background:var(--panel-2)}.step-jump-item.active{background:var(--accent-2);color:#fff}.runner-finished{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}.finished-card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:40px 48px;text-align:center;max-width:420px;width:100%}.finished-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%;background:var(--success);color:#fff;font-size:28px;margin-bottom:20px}.finished-card h2{margin:0 0 4px;font-size:22px}.score-ring{margin:20px auto;display:flex;justify-content:center}.score-details{margin-top:20px;border:1px solid var(--border);border-radius:8px;overflow:hidden}.score-row{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;font-size:14px;border-bottom:1px solid var(--border)}.score-row:last-child{border-bottom:none}.score-row.total{font-weight:600}.score-label{color:var(--muted)}.score-value{font-weight:600}.score-value.good{color:var(--success)}.score-value.warn{color:var(--warn)}.score-value.bad{color:var(--danger)}.finished-icon.fail{background:var(--danger)}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:36px 40px;width:100%;max-width:380px}.login-card h2{margin:0 0 24px;font-size:20px}.form-field{margin-bottom:16px}.form-field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.chapter-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:14px}.chapter-card h3{margin:0 0 4px;font-size:17px}.chapter-modes{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}