*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0d0d10;--surface:#16161c;--surface2:#1f1f27;--border:#2a2a36;--text:#e2e2ee;--text-muted:#7a7a90;--accent:#7c6fff;--role-start:#22c55e;--role-hand:#3b82f6;--role-finish:#ef4444;--role-foot:#e0559e}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:system-ui,-apple-system,sans-serif;font-size:14px}#root{flex-direction:column;min-height:100vh;display:flex}button{cursor:pointer;font-family:inherit;font-size:13px}.app{flex-direction:column;height:100vh;display:flex;overflow:hidden}.app-header{border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.app-header h1{letter-spacing:.02em;color:var(--text);font-size:16px;font-weight:600}.app-header .subtitle{color:var(--text-muted);margin-top:2px;font-size:12px}.app-body{flex:1;display:flex;overflow:hidden}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:260px;display:flex;overflow-y:auto}.sidebar-section{border-bottom:1px solid var(--border);padding:16px}.sidebar-section h2{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:12px;font-size:11px;font-weight:600}.tool-palette{flex-direction:column;gap:6px;display:flex}.tool-btn{border:1.5px solid var(--border);color:var(--text);background:0 0;border-radius:6px;align-items:center;gap:10px;padding:8px 12px;font-weight:500;transition:all .15s;display:flex}.tool-btn:hover{background:var(--surface2)}.tool-btn.active{background:var(--surface2);border-color:currentColor}.tool-btn .dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.tool-btn[data-role="5"]{color:var(--role-start)}.tool-btn[data-role="6"]{color:var(--role-hand)}.tool-btn[data-role="7"]{color:var(--role-finish)}.tool-btn[data-role="8"]{color:var(--role-foot)}.tool-btn[data-role=erase]{color:var(--text-muted)}.angle-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.angle-header h2{margin-bottom:0}.angle-value{color:var(--accent);font-variant-numeric:tabular-nums;font-size:13px;font-weight:600}.angle-slider{appearance:none;background:linear-gradient(to right, var(--accent) 0%, var(--accent) calc(var(--pct) * 100%), var(--surface2) calc(var(--pct) * 100%), var(--surface2) 100%);cursor:pointer;border-radius:2px;outline:none;width:100%;height:4px;margin-bottom:4px}.angle-slider::-webkit-slider-thumb{-webkit-appearance:none;background:var(--accent);border:2px solid var(--surface);width:16px;height:16px;box-shadow:0 0 0 1px var(--accent);border-radius:50%;transition:transform .1s,box-shadow .1s}.angle-slider::-moz-range-thumb{background:var(--accent);border:2px solid var(--surface);width:16px;height:16px;box-shadow:0 0 0 1px var(--accent);cursor:pointer;border-radius:50%}.angle-slider:hover::-webkit-slider-thumb{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);transform:scale(1.2)}.angle-slider:hover::-moz-range-thumb{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);transform:scale(1.2)}.toggle-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.toggle-label{flex-direction:column;gap:2px;display:flex}.toggle-label span:first-child{color:var(--text);font-weight:500}.toggle-label span:last-child{color:var(--text-muted);font-size:11px}.toggle{flex-shrink:0;width:36px;height:20px;position:relative}.toggle input{opacity:0;width:0;height:0;position:absolute}.toggle-track{background:var(--border);cursor:pointer;border-radius:20px;transition:background .2s;position:absolute;inset:0}.toggle-track:after{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .2s;position:absolute;top:3px;left:3px}.toggle input:checked+.toggle-track{background:var(--accent)}.toggle input:checked+.toggle-track:after{transform:translate(16px)}.hold-counts{flex-direction:column;gap:5px;display:flex}.count-row{justify-content:space-between;align-items:center;font-size:12px;display:flex}.count-row .label{color:var(--text-muted);align-items:center;gap:6px;display:flex}.count-row .dot{border-radius:50%;width:8px;height:8px}.count-row .num{color:var(--text);text-align:right;min-width:20px;font-weight:600}.dot-start{background:var(--role-start)}.dot-hand{background:var(--role-hand)}.dot-finish{background:var(--role-finish)}.dot-foot{background:var(--role-foot)}.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:6px;width:100%;padding:10px;font-size:14px;font-weight:600;transition:opacity .15s,transform .1s}.btn-primary:hover:not(:disabled){opacity:.9}.btn-primary:active:not(:disabled){transform:scale(.98)}.btn-primary:disabled{opacity:.35;cursor:not-allowed}.btn-secondary{border:1px solid var(--border);width:100%;color:var(--text-muted);background:0 0;border-radius:6px;margin-top:8px;padding:8px;font-weight:500;transition:all .15s}.btn-secondary:hover{background:var(--surface2);color:var(--text)}.result-panel{border-bottom:1px solid var(--border);padding:16px}.result-placeholder{text-align:center;color:var(--text-muted);padding:12px 0;font-size:12px}.result-grade{text-align:center;margin-bottom:14px}.grade-display{letter-spacing:-.02em;color:var(--accent);font-size:48px;font-weight:800;line-height:1}.grade-confidence{color:var(--text-muted);margin-top:4px;font-size:12px}.prob-bars{flex-direction:column;gap:4px;display:flex}.prob-row{align-items:center;gap:6px;font-size:11px;display:flex}.prob-label{text-align:right;width:32px;color:var(--text-muted);font-variant-numeric:tabular-nums;flex-shrink:0}.prob-bar-track{background:var(--surface2);border-radius:3px;flex:1;height:6px;overflow:hidden}.prob-bar-fill{background:var(--accent);border-radius:3px;height:100%;transition:width .4s}.prob-bar-fill.predicted{background:var(--role-finish)}.prob-pct{width:32px;color:var(--text-muted);font-variant-numeric:tabular-nums;font-size:10px}.loading-dots{justify-content:center;gap:5px;padding:16px 0;display:flex}.loading-dots span{background:var(--accent);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite bounce}.loading-dots span:nth-child(2){animation-delay:.2s}.loading-dots span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{opacity:.4;transform:scale(.6)}40%{opacity:1;transform:scale(1)}}.error-msg{color:var(--role-foot);text-align:center;padding:8px 0;font-size:12px}.validation-msg{color:var(--role-foot);text-align:center;margin:0;padding:4px 0 8px;font-size:12px}.board-area{background:#0a0a0d;flex:1;justify-content:center;align-items:center;padding:20px;display:flex;overflow:auto}.board-container{-webkit-user-select:none;user-select:none;position:relative}.board-container img{width:auto;max-height:calc(100vh - 100px);display:block}.hold-btn{cursor:pointer;background:#ffffff14;border:1.5px solid #fff3;border-radius:50%;padding:0;transition:transform .1s,border-color .1s,background .1s;position:absolute;transform:translate(-50%,-50%)}.hold-btn:hover{z-index:10;background:#ffffff2e;border-color:#fff9;transform:translate(-50%,-50%)scale(1.4)}.hold-btn.role-5{background:color-mix(in srgb, var(--role-start) 40%, transparent);border-color:var(--role-start)}.hold-btn.role-6{background:color-mix(in srgb, var(--role-hand) 40%, transparent);border-color:var(--role-hand)}.hold-btn.role-7{background:color-mix(in srgb, var(--role-finish) 40%, transparent);border-color:var(--role-finish)}.hold-btn.role-8{background:color-mix(in srgb, var(--role-foot) 40%, transparent);border-color:var(--role-foot)}.hold-btn.role-5:hover,.hold-btn.role-6:hover,.hold-btn.role-7:hover,.hold-btn.role-8:hover{filter:brightness(1.3)}.mobile-bottom{display:none}@media (width<=640px){.app{height:auto;min-height:100dvh;overflow:visible}.app-body{flex-direction:column;overflow:visible}.sidebar{border-right:none;border-bottom:1px solid var(--border);flex-shrink:0;grid-template-columns:1fr 1fr;width:100%;display:grid;overflow:visible}.sidebar>.sidebar-section:first-child{border-bottom:1px solid var(--border);grid-column:1/-1;padding:10px 12px}.sidebar-section{border-bottom:none;padding:10px 12px}.sidebar>.sidebar-section:nth-child(2){border-right:1px solid var(--border)}.sidebar-result{display:none}.tool-palette{flex-direction:row;gap:4px}.tool-btn{padding:6px 10px;font-size:12px}.angle-viz{display:none}.angle-header{margin-bottom:8px}.angle-slider{margin-bottom:0}.board-area{flex:none;justify-content:flex-start;align-items:flex-start;padding:0;overflow:visible}.board-container{width:100%;display:block}.board-container img{width:100%;height:auto;max-height:none}.hold-btn{width:11px!important;height:11px!important}.mobile-bottom{border-top:1px solid var(--border);background:var(--surface);flex-direction:column;display:flex}.mobile-bottom .result-panel{padding:12px 16px}.mobile-bottom .sidebar-section{border-top:1px solid var(--border);padding:12px 16px}}