:root{--lab-bg:#070a13;--panel-bg:#0f172abf;--glass-border:#ffffff14;--text:#f8fafc;--text-muted:#94a3b8;--red:#f43f5e;--green:#10b981;--blue:#3b82f6;--cyan:#06b6d4;--magenta:#d946ef;--yellow:#eab308;--font-main:"Outfit", "Noto Sans SC", sans-serif;--font-mono:"Orbitron", monospace;--accent:#10b981;--border-radius:20px}*{box-sizing:border-box;margin:0;padding:0}body,html{background-color:var(--lab-bg);width:100%;height:100%;color:var(--text);font-family:var(--font-main);line-height:1.5;overflow-x:hidden}#app-container{flex-direction:column;height:100vh;min-height:600px;display:flex}.app-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--glass-border);z-index:100;background:#0f172ae6;flex-shrink:0;justify-content:space-between;align-items:center;height:70px;padding:0 2rem;display:flex}.back-btn{color:var(--text-muted);align-items:center;gap:.5rem;font-size:.9rem;font-weight:500;text-decoration:none;transition:color .3s;display:flex}.back-btn svg{width:18px;height:18px}.back-btn:hover{color:#fff}.logo{font-family:var(--font-mono);background:linear-gradient(135deg,#10b981 0%,#3b82f6 100%);-webkit-text-fill-color:transparent;letter-spacing:1px;-webkit-background-clip:text;background-clip:text;font-size:1.3rem;font-weight:800}.mode-tabs{border:1px solid var(--glass-border);background:#0006;border-radius:30px;padding:4px;display:flex}.mode-tab{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:20px;padding:.5rem 1.2rem;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1)}.mode-tab.active{background:var(--text);color:#0f172a;box-shadow:0 4px 12px #ffffff1a}.main-content{flex:1;height:calc(100vh - 70px);display:flex;overflow:hidden}#sidebar{background:var(--panel-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-right:1px solid var(--glass-border);flex-direction:column;flex-shrink:0;gap:1.2rem;width:340px;padding:1.5rem;display:flex;overflow-y:auto}.control-card{border:1px solid var(--glass-border);background:#ffffff05;border-radius:16px;padding:1.2rem}.panel-section-title{text-transform:uppercase;letter-spacing:1px;color:#cbd5e1;border-left:3px solid var(--accent);margin-bottom:1rem;padding-left:.6rem;font-size:.85rem;font-weight:700}.slider-group{margin-bottom:1.2rem}.slider-group:last-child{margin-bottom:0}.slider-group label{color:var(--text-muted);justify-content:space-between;margin-bottom:.5rem;font-size:.85rem;display:flex}.slider-group label span{font-family:var(--font-mono);font-weight:700}input[type=range]{appearance:none;background:#ffffff1a;border-radius:3px;outline:none;width:100%;height:6px}input[type=range]::-webkit-slider-thumb{appearance:none;cursor:pointer;background:#fff;border-radius:50%;width:16px;height:16px;transition:transform .1s;box-shadow:0 0 10px #ffffff80}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.25)}#slide-r::-webkit-slider-runnable-track{background:linear-gradient(to right, #000, var(--red));border-radius:3px;height:6px}#slide-g::-webkit-slider-runnable-track{background:linear-gradient(to right, #000, var(--green));border-radius:3px;height:6px}#slide-b::-webkit-slider-runnable-track{background:linear-gradient(to right, #000, var(--blue));border-radius:3px;height:6px}#slide-c::-webkit-slider-runnable-track{background:linear-gradient(to right, #fff, var(--cyan));border-radius:3px;height:6px}#slide-m::-webkit-slider-runnable-track{background:linear-gradient(to right, #fff, var(--magenta));border-radius:3px;height:6px}#slide-y::-webkit-slider-runnable-track{background:linear-gradient(to right, #fff, var(--yellow));border-radius:3px;height:6px}.r-text{color:var(--red);text-shadow:0 0 8px #f43f5e4d}.g-text{color:var(--green);text-shadow:0 0 8px #10b9814d}.b-text{color:var(--blue);text-shadow:0 0 8px #3b82f64d}.c-text{color:var(--cyan);text-shadow:0 0 8px #06b6d44d}.m-text{color:var(--magenta);text-shadow:0 0 8px #d946ef4d}.y-text{color:var(--yellow);text-shadow:0 0 8px #eab3084d}.control-row{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.control-row label{color:var(--text-muted);font-size:.85rem}select{border:1px solid var(--glass-border);color:#fff;cursor:pointer;background:#0006;border-radius:8px;outline:none;padding:.4rem .8rem;font-family:inherit;font-size:.8rem}.secondary-btn{border:1px solid var(--glass-border);width:100%;color:var(--text);cursor:pointer;background:#ffffff0d;border-radius:10px;padding:.6rem;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s}.secondary-btn:hover{background:#ffffff1a;border-color:#fff3}.challenge-card{transition:all .4s}.challenge-header{justify-content:space-between;align-items:center;display:flex}.challenge-header .panel-section-title{margin-bottom:0}.challenge-toggle-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#10b981 0%,#059669 100%);border:none;border-radius:20px;padding:.35rem .8rem;font-size:.75rem;font-weight:700;transition:transform .2s,opacity .2s}.challenge-toggle-btn.active{background:#ef4444}.challenge-toggle-btn:hover{transform:scale(1.05)}.challenge-area{margin-top:1rem;animation:.3s forwards slideDown}.challenge-desc{color:var(--text-muted);margin-bottom:1rem;font-size:.75rem;line-height:1.4}.color-match-comparison{justify-content:space-around;margin-bottom:1rem;display:flex}.color-box{flex-direction:column;align-items:center;gap:.4rem;display:flex}.box-label{color:var(--text-muted);font-size:.7rem}.color-preview-circle{background-color:#000;border:2px solid #fff;border-radius:50%;width:55px;height:55px;transition:background-color .2s;box-shadow:0 4px 10px #00000080}.match-score-wrapper{align-items:center;gap:.8rem;font-size:.75rem;display:flex}.match-score-label{color:var(--text-muted);white-space:nowrap}.score-bar-bg{background:#ffffff1a;border-radius:3px;flex:1;height:6px;overflow:hidden}.score-bar-fill{background:var(--accent);border-radius:3px;height:100%;transition:width .2s,background .2s}.score-value{font-family:var(--font-mono);text-align:right;min-width:40px;font-weight:700}.success-alert{color:#34d399;background:#10b9811a;border:1px solid #10b9814d;border-radius:10px;margin-top:1rem;padding:.8rem;font-size:.75rem;line-height:1.4;animation:2s ease-in-out infinite pulseGlow}#workspace-container{background-image:radial-gradient(circle at 2px 2px,#ffffff04 1px,#0000 0);background-position:50%;background-size:30px 30px;flex-direction:column;flex:1;display:flex;overflow-y:auto}.workspace-main{flex:1;align-items:flex-start;gap:2rem;min-height:500px;padding:2rem;display:flex}.canvas-wrapper{border:1px solid var(--glass-border);border-radius:var(--border-radius);background:#00000073;flex:1;height:460px;position:relative;overflow:hidden;box-shadow:inset 0 4px 30px #000c}#mix-canvas{cursor:grab;width:100%;height:100%}#mix-canvas:active{cursor:grabbing}.interaction-hint{color:#fff6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);pointer-events:none;background:#0009;border:1px solid #ffffff0d;border-radius:30px;align-items:center;gap:.5rem;padding:6px 16px;font-size:.75rem;display:flex;position:absolute;bottom:20px;left:50%;transform:translate(-50%)}.interaction-hint svg{animation:1.5s ease-in-out infinite floatHand}.spectrum-panel{background:var(--panel-bg);border:1px solid var(--glass-border);border-radius:var(--border-radius);flex-direction:column;flex-shrink:0;width:320px;height:460px;padding:1.5rem;display:flex;box-shadow:0 8px 32px #0000004d}.spectrum-title{color:#e2e8f0;align-items:center;gap:.5rem;margin-bottom:1.2rem;font-size:.95rem;font-weight:700;display:flex}.spectrum-canvas-wrapper{border:1px solid var(--glass-border);background:#04060b;border-radius:12px;flex:1;position:relative;overflow:hidden}#spectrum-canvas{width:100%;height:100%}.spectrum-legend{justify-content:space-between;margin-top:.5rem;display:flex}.wavelength-label{color:var(--text-muted);width:33%;font-size:.65rem}.text-center{text-align:center}.text-right{text-align:right}.spectrum-desc{color:var(--text-muted);border-top:1px solid #ffffff0d;margin-top:1rem;padding-top:.8rem;font-size:.75rem;line-height:1.45}.theory-section{border-top:1px solid var(--glass-border);background:#0f172a99;margin-top:auto;padding:3rem 2rem}.theory-title{text-align:center;background:linear-gradient(to right, #fff 20%, var(--text-muted) 80%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:2rem;font-size:1.5rem;font-weight:700}.theory-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;max-width:1200px;margin:0 auto;display:grid}.theory-card{border:1px solid var(--glass-border);background:#ffffff05;border-radius:16px;padding:1.8rem;transition:transform .3s,border-color .3s}.theory-card:hover{border-color:#ffffff26;transform:translateY(-5px)}.theory-card .card-icon{margin-bottom:1rem;font-size:2.2rem}.theory-card h4{color:#f1f5f9;margin-bottom:.8rem;font-size:1.1rem;font-weight:600}.theory-card p{color:var(--text-muted);margin-bottom:1rem;font-size:.88rem;line-height:1.6}.theory-card ul{margin-bottom:1rem;list-style:none}.theory-card li{color:var(--text-muted);margin-bottom:.4rem;padding-left:1rem;font-size:.85rem;position:relative}.theory-card li:before{content:"•";color:var(--accent);font-weight:700;position:absolute;left:0}.theory-formula{font-family:var(--font-mono);color:#cbd5e1;background:#0000004d;border:1px solid #ffffff0d;border-radius:8px;margin-bottom:1rem;padding:.8rem;font-size:.8rem;line-height:1.5}.app-example{border-left:2px solid var(--accent);color:#94a3b8;padding-left:.6rem;font-size:.8rem!important}.hidden{display:none!important}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 5px #10b9811a}50%{box-shadow:0 0 15px #10b98140}}@keyframes floatHand{0%,to{transform:translate(0)}50%{transform:translate(-4px)}}@media (width<=1024px){.main-content{flex-direction:column;height:auto;overflow-y:auto}#sidebar{border-right:none;border-bottom:1px solid var(--glass-border);width:100%;height:auto}#workspace-container{height:auto}.workspace-main{flex-direction:column;align-items:stretch}.canvas-wrapper,.spectrum-panel{width:100%;height:400px}}