:root{--color-duo-green:#58cc02;--color-duo-green-dark:#46a302;--color-duo-red:#ea2b2b;--color-duo-red-dark:#c21d1d;--color-duo-blue:#1899d6;--color-duo-orange:#ff9600;--color-duo-gold:#ffc800;--color-duo-purple:#8549ba;--color-duo-gray:#afafaf;--color-duo-bg-dark:#0f172a;--color-duo-card-dark:#1e293b}.learning-container{min-height:calc(100vh - 70px);font-family:var(--ds-font);color:#334155;background-color:#f8fafc;transition:all .3s;display:flex}.learning-sidebar{background-color:#fff;border-right:2px solid #e2e8f0;flex-direction:column;gap:1.5rem;width:280px;padding:1.5rem;transition:transform .3s;display:flex}@media (width<=768px){.learning-sidebar{z-index:50;position:fixed;top:70px;bottom:0;left:0;transform:translate(-100%);box-shadow:10px 0 15px -3px #0000000d}.learning-sidebar.open{transform:translate(0)}}.sidebar-header h2{color:var(--color-blue);margin:0 0 .5rem;font-size:1.25rem;font-weight:800}.concept-nav-list{flex-direction:column;gap:.75rem;margin:0;padding:0;list-style:none;display:flex}.concept-nav-item{cursor:pointer;background-color:#f1f5f9;border:2px solid #0000;border-radius:12px;align-items:center;gap:.75rem;padding:.85rem 1rem;font-weight:600;transition:all .2s;display:flex}.concept-nav-item:hover{background-color:#e2e8f0}.concept-nav-item.active{border-color:var(--color-duo-blue);color:var(--color-duo-blue);background-color:#eff6ff}.concept-nav-item.completed{border-color:var(--color-duo-green);color:var(--color-duo-green-dark);background-color:#f0fdf4}.concept-status-dot{background-color:#cbd5e1;border-radius:50%;width:12px;height:12px}.concept-nav-item.active .concept-status-dot{background-color:var(--color-duo-blue);box-shadow:0 0 8px var(--color-duo-blue)}.concept-nav-item.completed .concept-status-dot{background-color:var(--color-duo-green)}.learning-workspace{background:radial-gradient(circle at 10% 20%,#e67e2208 0%,#09bcd708 90%);flex-direction:column;flex-grow:1;display:flex;position:relative}.learning-topbar{background-color:#fff;border-bottom:2px solid #e2e8f0;justify-content:space-between;align-items:center;gap:1.5rem;padding:1rem 2rem;display:flex}.progress-bar-container{background-color:#e2e8f0;border-radius:9999px;flex-grow:1;max-width:600px;height:16px;position:relative;overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg, var(--color-duo-blue) 0%, #38bdf8 100%);border-radius:9999px;height:100%;transition:width .4s cubic-bezier(.4,0,.2,1)}.progress-bar-glow{background:linear-gradient(90deg, #fff0 0%, #fff6 50%, #fff0 100*);animation:2s infinite shimmer;position:absolute;inset:0}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.learning-stats{align-items:center;gap:1.25rem;display:flex}.stat-pill{background-color:#f1f5f9;border:1px solid #e2e8f0;border-radius:9999px;align-items:center;gap:.4rem;padding:.35rem .85rem;font-size:1.1rem;font-weight:700;display:flex}.stat-pill.xp{color:var(--color-duo-orange);background-color:#ff960014;border-color:#ff960033}.stat-pill.hearts{color:var(--color-duo-red);background-color:#ea2b2b14;border-color:#ea2b2b33}.stat-pill.streak{color:var(--color-duo-orange);background-color:#e67e221a}.learning-content-card-wrapper{flex-grow:1;justify-content:center;align-items:center;padding:2rem;display:flex}.learning-card{background-color:#fff;border:2px solid #e2e8f0;border-radius:24px;flex-direction:column;gap:1.75rem;width:100%;max-width:680px;padding:2.5rem;animation:.3s slideUp;display:flex;position:relative;box-shadow:0 10px 30px #0000000a,0 1px 3px #00000005}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.card-step-badge{text-transform:uppercase;letter-spacing:.05em;border-radius:9999px;align-self:flex-start;padding:.25rem .75rem;font-size:.875rem;font-weight:800}.step-hook .card-step-badge{color:var(--color-duo-purple);background-color:#8549ba1a}.step-discovery .card-step-badge,.step-guided-discovery .card-step-badge{color:var(--color-duo-blue);background-color:#1899d61a}.step-classification .card-step-badge{color:var(--color-duo-orange);background-color:#ff96001a}.step-fill .card-step-badge,.step-fill-in-the-blank .card-step-badge{color:#b45309;background-color:#ffc80026}.step-scenario .card-step-badge{color:var(--color-duo-red);background-color:#ea2b2b1a}.step-reflection .card-step-badge{color:var(--color-duo-green-dark);background-color:#46a3021a}.step-assessment .card-step-badge{color:#0f172a;background-color:#0f172a14}.learning-card h3{color:var(--color-blue);margin:0;font-size:1.5rem;font-weight:800}.prompt-text{color:#1e293b;margin:0;font-size:1.15rem;font-weight:600;line-height:1.6}.story-text{color:#475569;border-left:4px solid var(--color-duo-blue);background-color:#f8fafc;border-radius:16px;padding:1.25rem;font-size:1.05rem;line-height:1.6}.options-grid{flex-direction:column;gap:.75rem;display:flex}.option-button{color:#334155;text-align:left;cursor:pointer;background-color:#fff;border:2px solid #e2e8f0;border-radius:16px;align-items:center;width:100%;padding:1rem 1.25rem;font-size:1.05rem;font-weight:600;transition:all .2s;display:flex;box-shadow:0 4px #e2e8f0}.option-button:hover:not(:disabled){background-color:#f8fafc;border-color:#cbd5e1;transform:translateY(-2px);box-shadow:0 6px #cbd5e1}.option-button.selected{border-color:var(--color-duo-blue);box-shadow:0 4px 0 var(--color-duo-blue);color:var(--color-duo-blue);background-color:#1899d60f}.option-number{color:#64748b;border:2px solid #e2e8f0;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;margin-right:1rem;font-size:.875rem;font-weight:800;display:inline-flex}.option-button.selected .option-number{border-color:var(--color-duo-blue);background-color:var(--color-duo-blue);color:#fff}.classification-layout{flex-direction:column;gap:1.5rem;display:flex}.classification-draggable-pool{background-color:#f1f5f9;border:2px dashed #cbd5e1;border-radius:16px;flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;min-height:80px;padding:1.25rem;display:flex}.draggable-item{cursor:grab;user-select:none;background-color:#fff;border:2px solid #e2e8f0;border-radius:12px;padding:.65rem 1rem;font-weight:700;transition:all .2s;box-shadow:0 3px #e2e8f0}.draggable-item:active{cursor:grabbing}.classification-bins{grid-template-columns:1fr 1fr;gap:1rem;display:grid}@media (width<=480px){.classification-bins{grid-template-columns:1fr}}.classification-bin{background-color:#fff;border:2px solid #cbd5e1;border-radius:16px;flex-direction:column;gap:.5rem;min-height:180px;padding:1rem;transition:all .2s;display:flex}.classification-bin.drag-over{border-color:var(--color-duo-blue);background-color:#1899d608}.classification-bin h4{text-transform:uppercase;letter-spacing:.05em;text-align:center;color:#475569;margin:0 0 .5rem;font-size:.95rem;font-weight:800}.bin-in-scope h4{color:var(--color-duo-green-dark)}.bin-out-scope h4{color:var(--color-duo-red-dark)}.bin-in-scope{background-color:#58cc0205;border-color:#58cc024d}.bin-out-scope{background-color:#ea2b2b05;border-color:#ea2b2b4d}.bin-items-container{flex-direction:column;flex-grow:1;gap:.5rem;display:flex}.fill-blank-container{flex-direction:column;gap:1rem;display:flex}.fill-blank-sentence{color:#334155;font-size:1.25rem;font-weight:600;line-height:1.8}.fill-blank-input{width:200px;color:var(--color-duo-blue);text-align:center;background-color:#0000;border:none;border-bottom:3px solid #cbd5e1;outline:none;padding:.25rem .5rem;font-size:1.25rem;font-weight:700;transition:border-color .2s}.fill-blank-input:focus{border-color:var(--color-duo-blue)}.reflection-textarea{width:100%;height:120px;font-size:1.05rem;font-family:var(--ds-font);resize:none;border:2px solid #cbd5e1;border-radius:16px;outline:none;padding:1rem;transition:border-color .2s}.reflection-textarea:focus{border-color:var(--color-duo-blue)}.leo-mascot-tip{background-color:#e67e2214;border:1px solid #e67e2233;border-radius:16px;align-items:center;gap:1rem;padding:1rem;display:flex}.leo-mascot-avatar{font-size:2.2rem}.leo-mascot-text{color:#7c2d12;font-size:.95rem;font-weight:600;line-height:1.5}.learning-action-bar{background-color:#fff;border-top:2px solid #e2e8f0;justify-content:space-between;align-items:center;padding:1.5rem 2.5rem;display:flex}.btn-check-answer{background-color:var(--color-duo-green);color:#fff;cursor:pointer;box-shadow:0 4px 0 var(--color-duo-green-dark);border:none;border-radius:16px;padding:.95rem 2rem;font-size:1.05rem;font-weight:800;transition:all .2s}.btn-check-answer:hover:not(:disabled){box-shadow:0 6px 0 var(--color-duo-green-dark);background-color:#60e002;transform:translateY(-2px)}.btn-check-answer:disabled{color:#94a3b8;box-shadow:none;cursor:not-allowed;background-color:#e2e8f0}.feedback-sheet{z-index:20;border-top-left-radius:24px;border-top-right-radius:24px;justify-content:space-between;align-items:center;gap:2rem;padding:2rem 2.5rem;animation:.25s cubic-bezier(.4,0,.2,1) slideUp;display:flex;position:absolute;bottom:0;left:0;right:0}.feedback-sheet.correct{background-color:#dcfce7;border-top:2px solid #86efac}.feedback-sheet.incorrect{background-color:#fee2e2;border-top:2px solid #fca5a5}.feedback-left{align-items:flex-start;gap:1.25rem;display:flex}.feedback-icon-container{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:1.5rem;display:flex}.feedback-sheet.correct .feedback-icon-container{color:#fff;background-color:#22c55e}.feedback-sheet.incorrect .feedback-icon-container{color:#fff;background-color:#ef4444}.feedback-details h4{margin:0 0 .35rem;font-size:1.2rem;font-weight:800}.feedback-sheet.correct .feedback-details h4{color:#15803d}.feedback-sheet.incorrect .feedback-details h4{color:#b91c1c}.feedback-details p{color:#475569;margin:0;font-size:.95rem;font-weight:600;line-height:1.5}.btn-continue{background-color:var(--color-duo-green);color:#fff;cursor:pointer;box-shadow:0 4px 0 var(--color-duo-green-dark);white-space:nowrap;border:none;border-radius:16px;padding:.95rem 2.5rem;font-size:1.05rem;font-weight:800;transition:all .2s}.feedback-sheet.incorrect .btn-continue{background-color:var(--color-duo-red);box-shadow:0 4px 0 var(--color-duo-red-dark)}.btn-continue:hover{transform:translateY(-2px)}.feedback-sheet.correct .btn-continue:hover{box-shadow:0 6px 0 var(--color-duo-green-dark);background-color:#60e002}.feedback-sheet.incorrect .btn-continue:hover{box-shadow:0 6px 0 var(--color-duo-red-dark);background-color:#ff3b3b}.finish-screen{text-align:center;flex-direction:column;align-items:center;gap:1.5rem;max-width:500px;margin:0 auto;padding:3rem 1.5rem;display:flex}.finish-badge{font-size:5rem;animation:1s infinite alternate bounce}@keyframes bounce{0%{transform:translateY(0)}to{transform:translateY(-12px)}}.finish-screen h2{color:var(--color-blue);margin:0;font-size:2rem;font-weight:800}.finish-stats-row{grid-template-columns:1fr 1fr;gap:1rem;width:100%;margin:1.5rem 0;display:grid}.finish-stat-box{background-color:#fff;border:2px solid #e2e8f0;border-radius:20px;flex-direction:column;align-items:center;gap:.5rem;padding:1.25rem;display:flex;box-shadow:0 4px #e2e8f0}.finish-stat-box .label{text-transform:uppercase;color:#94a3b8;font-size:.875rem;font-weight:800}.finish-stat-box .value{font-size:1.8rem;font-weight:900}.finish-stat-box.xp-box .value{color:var(--color-duo-orange)}.finish-stat-box.mastery-box .value{color:var(--color-duo-purple)}.confetti-canvas{pointer-events:none;z-index:10;width:100%;height:100%;position:absolute;top:0;left:0}.discovery-layout{flex-direction:column;gap:1rem;display:flex}.discovery-items-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.75rem;display:grid}.discovery-item-card{text-align:center;cursor:pointer;background-color:#fff;border:2px solid #cbd5e1;border-radius:16px;padding:1rem;font-weight:700;transition:all .2s;box-shadow:0 4px #cbd5e1}.discovery-item-card:hover{transform:translateY(-2px);box-shadow:0 6px #cbd5e1}.discovery-item-card.selected{border-color:var(--color-duo-blue);box-shadow:0 4px 0 var(--color-duo-blue);color:var(--color-duo-blue);background-color:#1899d60d}.discovery-item-card.correct-item{border-color:var(--color-duo-green);box-shadow:0 4px 0 var(--color-duo-green);color:var(--color-duo-green-dark);background-color:#58cc020d}.discovery-item-card.incorrect-item{border-color:var(--color-duo-red);box-shadow:0 4px 0 var(--color-duo-red);color:var(--color-duo-red-dark);background-color:#ea2b2b0d}.game-over-screen{text-align:center;flex-direction:column;align-items:center;gap:1.5rem;max-width:500px;margin:0 auto;padding:3rem 1.5rem;display:flex}.game-over-icon{font-size:5rem}.game-over-screen h2{color:var(--color-duo-red);margin:0;font-size:2rem;font-weight:800}.game-over-screen p{color:#64748b;font-size:1.1rem;line-height:1.6}.btn-restart{background-color:var(--color-duo-blue);color:#fff;cursor:pointer;border:none;border-radius:16px;padding:.95rem 2.5rem;font-size:1.05rem;font-weight:800;transition:all .2s;box-shadow:0 4px #0369a1}.btn-restart:hover{background-color:#0284c7;transform:translateY(-2px)}