@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap";:root{--font-sans:"Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--bg-primary:#fff;--bg-secondary:#f7f7f7;--text-main:#3c3c3c;--text-muted:#777;--text-inverse:#fff;--border-width-standard:2px;--border-width-3d:4px;--color-border:#e5e5e5;--color-green:#58cc02;--color-green-dark:#46a302;--color-green-light:#d7ffb7;--color-blue:#1cb0f6;--color-blue-dark:#1899d6;--color-blue-light:#ddf4ff;--color-orange:#ff9600;--color-orange-dark:#e27b00;--color-orange-light:#ffebcc;--color-purple:#a55eea;--color-purple-dark:#8844d4;--color-purple-light:#f3ebfc;--color-red:#ff4b4b;--color-red-dark:#ea2b2b;--color-red-light:#ffdfe0;--color-gray:#afafaf;--color-gray-dark:#777;--color-gray-light:#e5e5e5;--theme-primary:var(--color-green);--theme-primary-dark:var(--color-green-dark);--theme-primary-light:var(--color-green-light)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;line-height:1.5}.app-container{flex-direction:column;max-width:100vw;min-height:100vh;display:flex}.main-layout{flex:1;gap:32px;width:100%;max-width:1100px;margin:0 auto;padding:24px 16px;display:flex}.content-area{flex:1;max-width:640px;padding-bottom:80px}.sidebar-area{flex-shrink:0;width:320px;height:fit-content;position:sticky;top:96px}@media (width<=900px){.main-layout{flex-direction:column;gap:16px;padding:16px}.sidebar-area{width:100%;position:static}.content-area{max-width:100%}}.btn-3d{font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.8px;border:var(--border-width-standard) solid transparent;cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:16px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:15px;font-weight:700;transition:filter .1s,transform .1s,box-shadow .1s;display:inline-flex;position:relative}.btn-3d:active:not(:disabled){transform:translateY(4px);box-shadow:none!important}.btn-3d:disabled{cursor:not-allowed;opacity:.6}.btn-green{background-color:var(--color-green);color:var(--text-inverse);box-shadow:0 4px 0 var(--color-green-dark)}.btn-green:hover:not(:disabled){filter:brightness(1.05)}.btn-blue{background-color:var(--color-blue);color:var(--text-inverse);box-shadow:0 4px 0 var(--color-blue-dark)}.btn-blue:hover:not(:disabled){filter:brightness(1.05)}.btn-orange{background-color:var(--color-orange);color:var(--text-inverse);box-shadow:0 4px 0 var(--color-orange-dark)}.btn-orange:hover:not(:disabled){filter:brightness(1.05)}.btn-purple{background-color:var(--color-purple);color:var(--text-inverse);box-shadow:0 4px 0 var(--color-purple-dark)}.btn-purple:hover:not(:disabled){filter:brightness(1.05)}.btn-gray{background-color:var(--bg-primary);color:var(--text-muted);border:var(--border-width-standard) solid var(--color-border);box-shadow:0 4px 0 var(--color-border)}.btn-gray:hover:not(:disabled){background-color:var(--bg-secondary)}.btn-locked{background-color:var(--color-gray-light);color:var(--color-gray);cursor:not-allowed;box-shadow:0 4px #ccc}.card-3d{background-color:var(--bg-primary);border:var(--border-width-standard) solid var(--color-border);box-shadow:0 4px 0 var(--color-border);border-radius:20px;padding:24px;transition:transform .15s,box-shadow .15s}.path-map{flex-direction:column;align-items:center;gap:20px;width:100%;padding:16px 0;display:flex;position:relative}.level-section{width:100%;margin-bottom:32px}.level-banner{color:var(--text-inverse);text-align:center;border-radius:20px;margin-bottom:24px;padding:20px;position:relative;overflow:hidden;box-shadow:0 4px #00000026}.level-banner h2{letter-spacing:.5px;margin-bottom:4px;font-size:20px;font-weight:800}.level-banner p{opacity:.9;font-size:14px;font-weight:500}.lessons-container{flex-direction:column;align-items:center;gap:24px;width:100%;display:flex;position:relative}.node-wrapper{justify-content:center;width:100%;display:flex;position:relative}.node-wrapper:nth-child(4n+1) .node-btn-container{transform:translate(-40px)}.node-wrapper:nth-child(4n+2) .node-btn-container{transform:translate(0)}.node-wrapper:nth-child(4n+3) .node-btn-container{transform:translate(40px)}.node-wrapper:nth-child(4n+4) .node-btn-container{transform:translate(0)}.node-btn-container{cursor:pointer;flex-direction:column;align-items:center;display:flex;position:relative}.node-label{color:var(--text-main);text-align:center;pointer-events:none;text-shadow:0 1px #fff;max-width:120px;margin-top:8px;font-size:13px;font-weight:700}.node-btn{border:var(--border-width-standard) solid transparent;cursor:pointer;border-radius:50%;outline:none;justify-content:center;align-items:center;width:70px;height:70px;transition:transform .1s,box-shadow .1s;display:flex;position:relative}.node-btn:active:not(.locked){transform:translateY(4px);box-shadow:none!important}.path-line{background-color:var(--color-border);z-index:0;border-radius:4px;width:8px;position:absolute;top:35px;bottom:35px}.node-btn.completed{box-shadow:0 6px 0 var(--theme-primary-dark);background-color:var(--theme-primary);color:#fff}.node-btn.active{box-shadow:0 6px 0 var(--theme-primary-dark);background-color:var(--theme-primary);color:#fff;animation:2s infinite pulse-ring}.node-btn.locked{background-color:var(--color-gray-light);color:var(--color-gray);cursor:not-allowed;box-shadow:0 6px #ccc}@keyframes pulse-ring{0%{box-shadow:0 6px 0 var(--theme-primary-dark), 0 0 0 0 #58cc0266}70%{box-shadow:0 6px 0 var(--theme-primary-dark), 0 0 0 12px #58cc0200}to{box-shadow:0 6px 0 var(--theme-primary-dark), 0 0 0 0 #58cc0200}}.quiz-header{justify-content:space-between;align-items:center;gap:16px;width:100%;max-width:640px;margin:0 auto;padding:16px;display:flex}.progress-track{background-color:var(--color-border);border-radius:8px;flex:1;height:16px;position:relative;overflow:hidden}.progress-bar-fill{border-radius:8px;height:100%;transition:width .3s cubic-bezier(.4,0,.2,1)}.close-btn{color:var(--color-gray-dark);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;transition:color .2s;display:flex}.close-btn:hover{color:var(--text-main)}.lesson-card-wrapper{max-width:580px;margin:40px auto;animation:.4s ease-out slide-up}@keyframes slide-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.slide-title{color:var(--text-main);margin-bottom:16px;font-size:26px;font-weight:800;line-height:1.2}.slide-content{color:var(--text-main);white-space:pre-line;margin-bottom:24px;font-size:17px}.slide-highlight{background-color:var(--color-blue-light);border-left:4px solid var(--color-blue);color:var(--color-blue-dark);border-radius:12px;padding:16px;font-size:15px;font-weight:600}.options-list{flex-direction:column;gap:12px;margin-top:24px;display:flex}.option-card{border:var(--border-width-standard) solid var(--color-border);background-color:var(--bg-primary);cursor:pointer;color:var(--text-main);-webkit-user-select:none;user-select:none;box-shadow:0 3px 0 var(--color-border);text-align:left;border-radius:16px;align-items:center;gap:16px;padding:16px;font-size:16px;font-weight:600;transition:all .15s;display:flex}.option-card:hover{background-color:var(--bg-secondary);border-color:#bbb}.option-card.selected{border-color:var(--color-blue);background-color:var(--color-blue-light);color:var(--color-blue-dark);box-shadow:0 3px 0 var(--color-blue-dark)}.option-badge{border:var(--border-width-standard) solid var(--color-border);width:28px;height:28px;color:var(--color-gray-dark);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:800;display:flex}.option-card.selected .option-badge{border-color:var(--color-blue);background-color:var(--color-blue);color:var(--text-inverse)}.quiz-footer{background-color:var(--bg-primary);border-top:var(--border-width-standard) solid var(--color-border);z-index:100;justify-content:center;align-items:center;padding:24px 16px;display:flex;position:fixed;bottom:0;left:0;right:0}.quiz-footer-content{justify-content:space-between;align-items:center;gap:16px;width:100%;max-width:640px;display:flex}.quiz-footer.correct{background-color:var(--color-green-light);border-top-color:var(--color-green);animation:.25s ease-out slide-up-footer}.quiz-footer.incorrect{background-color:var(--color-red-light);border-top-color:var(--color-red);animation:.25s ease-out slide-up-footer}@keyframes slide-up-footer{0%{transform:translateY(100%)}to{transform:translateY(0)}}.result-message-container{flex:1;align-items:flex-start;gap:16px;display:flex}.result-title{margin-bottom:4px;font-size:20px;font-weight:800}.quiz-footer.correct .result-title{color:var(--color-green-dark)}.quiz-footer.incorrect .result-title{color:var(--color-red-dark)}.result-explanation{color:var(--text-main);font-size:14px;font-weight:500;line-height:1.4}.badges-grid{grid-template-columns:repeat(auto-fill,minmax(130px,150px));justify-content:space-between;gap:16px;margin-top:16px;display:grid}.badge-card{border:var(--border-width-standard) solid var(--color-border);background-color:var(--bg-primary);text-align:center;opacity:.4;filter:grayscale();border-radius:16px;flex-direction:column;align-items:center;padding:16px 8px;transition:all .3s;display:flex}.badge-card.unlocked{opacity:1;filter:grayscale(0);border-color:var(--color-orange-dark);box-shadow:0 4px 0 var(--color-orange-light);background:linear-gradient(180deg, #fff 0%, var(--color-orange-light) 100%)}.badge-icon-holder{background-color:var(--bg-secondary);width:50px;height:50px;color:var(--color-gray-dark);border-radius:50%;justify-content:center;align-items:center;margin-bottom:10px;display:flex}.badge-card.unlocked .badge-icon-holder{background-color:var(--color-orange);color:#fff}.badge-name{color:var(--text-main);margin-bottom:4px;font-size:13px;font-weight:800}.badge-desc{color:var(--text-muted);font-size:10px;font-weight:500;line-height:1.2}.celebrate-screen{text-align:center;flex-direction:column;justify-content:center;align-items:center;max-width:500px;margin:40px auto;padding:40px 16px;animation:.3s cubic-bezier(.175,.885,.32,1.275) scale-up;display:flex}@keyframes scale-up{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.stat-pill-container{gap:16px;width:100%;margin:32px 0;display:flex}.stat-pill{border:var(--border-width-standard) solid var(--color-border);border-radius:20px;flex-direction:column;flex:1;align-items:center;padding:16px;font-weight:800;display:flex}.stat-pill.xp-pill{border-color:var(--color-orange);color:var(--color-orange-dark);background-color:var(--color-orange-light)}.stat-pill.streak-pill{border-color:var(--color-red);color:var(--color-red-dark);background-color:var(--color-red-light)}.stat-pill-num{margin-top:4px;font-size:24px}.stat-pill-label{text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);font-size:12px;font-weight:700}.header-sticky{background-color:var(--bg-primary);border-bottom:var(--border-width-standard) solid var(--color-border);z-index:90;width:100%;padding:0 16px;position:sticky;top:0}.header-content{justify-content:space-between;align-items:center;width:100%;max-width:1100px;height:72px;margin:0 auto;display:flex}.header-logo{color:var(--color-green-dark);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;font-size:22px;font-weight:800;display:flex}.header-stats{align-items:center;gap:20px;display:flex}.stat-badge{align-items:center;gap:6px;font-size:15px;font-weight:700;display:flex}.stat-badge.xp{color:var(--color-orange-dark)}.stat-badge.streak{color:var(--color-red-dark)}.stat-badge.level{color:var(--color-blue-dark);background-color:var(--color-blue-light);text-transform:uppercase;border-radius:12px;padding:4px 10px;font-size:12px;font-weight:800}.reset-btn{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 8px;font-size:11px;font-weight:700;transition:all .2s}.reset-btn:hover{background-color:var(--bg-secondary);color:var(--color-red-dark)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-gray)}