:root{--bg: #F9F9F9;--surface: #FFFFFF;--surface-2: #F3F4F6;--surface-3: #E5E7EB;--text: #1F2937;--text-muted: #6B7280;--text-dim: #9CA3AF;--brand: #58CC02;--brand-light: #7FDD2A;--brand-dark: #46A302;--brand-bg: #D7FFB8;--correct: #58CC02;--correct-bg: #D7FFB8;--correct-dark: #46A302;--wrong: #FF4B4B;--wrong-bg: #FFDFE0;--wrong-dark: #CC0000;--warn: #FFC800;--warn-bg: #FFF3CD;--warn-dark: #D97706;--blue: #1CB0F6;--blue-bg: #E0F4FF;--blue-dark: #0A8DC7;--purple: #CE82FF;--purple-bg: #F3E8FF;--purple-dark: #A855F7;--border: #E5E7EB;--shadow: rgba(0, 0, 0, .08);--shadow-glow: rgba(88, 204, 2, .15);--font-nunito: "Nunito", sans-serif;--font-outfit: "Outfit", sans-serif}[data-theme=dark]{--bg: #0f172a;--surface: #1e293b;--surface-2: #334155;--surface-3: #475569;--text: #f8fafc;--text-muted: #94a3b8;--text-dim: #64748b;--brand: #58CC02;--brand-light: #7FDD2A;--brand-dark: #46A302;--brand-bg: #1A3A00;--correct: #58CC02;--correct-bg: #1A3A00;--correct-dark: #46A302;--wrong: #FF4B4B;--wrong-bg: #3A0000;--wrong-dark: #CC0000;--warn: #FFC800;--warn-bg: #3A2A00;--warn-dark: #D97706;--blue: #1CB0F6;--blue-bg: #003A5E;--blue-dark: #0A8DC7;--purple: #CE82FF;--purple-bg: #2E0058;--purple-dark: #A855F7;--border: #334155;--shadow: rgba(0, 0, 0, .4);--shadow-glow: rgba(88, 204, 2, .25)}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .25s ease,border-color .25s ease}body{font-family:var(--font-nunito);background-color:var(--bg);color:var(--text);overflow:hidden;height:100vh;width:100vw;-webkit-font-smoothing:antialiased}button,input,select{font-family:inherit;font-size:inherit;color:inherit}.app-container{display:flex;height:100vh;width:100vw;overflow:hidden}.sidebar{width:256px;background-color:var(--surface);border-right:2px solid var(--border);display:flex;flex-direction:column;padding:24px 16px;height:100%;flex-shrink:0;z-index:10}.sidebar-logo{display:flex;align-items:center;gap:12px;padding:0 12px 28px;cursor:pointer}.sidebar-logo-img{width:40px;height:40px;object-fit:contain}.sidebar-logo-text{font-family:var(--font-outfit);font-weight:800;font-size:24px;color:var(--brand);letter-spacing:-.5px}.sidebar-menu{display:flex;flex-direction:column;gap:8px;flex-grow:1}.sidebar-btn{display:flex;align-items:center;gap:16px;padding:12px 16px;border-radius:12px;border:none;background:transparent;color:var(--text-muted);font-family:var(--font-nunito);font-weight:800;font-size:15px;text-transform:uppercase;letter-spacing:.8px;cursor:pointer;text-align:left;transition:all .2s cubic-bezier(.34,1.56,.64,1)}.sidebar-btn:hover{background-color:var(--surface-2);color:var(--text);transform:translate(4px)}.sidebar-btn.active{background-color:var(--brand-bg);color:var(--brand-dark);box-shadow:inset 0 0 0 2px var(--brand)}.sidebar-btn.active .sidebar-icon{transform:scale(1.15)}.sidebar-icon{font-size:22px;transition:transform .2s ease;width:24px;display:inline-flex;justify-content:center}.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:12px;border-top:2px solid var(--border);padding-top:16px}.main-content{flex-grow:1;height:100%;overflow:hidden;display:flex;flex-direction:column;position:relative}.screen-container{padding:40px;max-width:1200px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:0}.dashboard-grid{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:start}@media (max-width: 1024px){.dashboard-grid{grid-template-columns:1fr}}.card-glass{background:var(--surface);border-radius:20px;border:2px solid var(--border);padding:24px;box-shadow:0 8px 30px var(--shadow);position:relative;overflow:hidden}[data-theme=dark] .card-glass{background:#1e293bb3;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.card-title{font-family:var(--font-outfit);font-weight:800;font-size:20px;margin-bottom:16px;display:flex;align-items:center;gap:10px}.btn-duo{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-nunito);font-weight:800;font-size:16px;text-transform:uppercase;letter-spacing:.8px;padding:14px 28px;border-radius:16px;border:none;background-color:var(--brand);color:#fff;border-bottom:4px solid var(--brand-dark);cursor:pointer;-webkit-user-select:none;user-select:none;position:relative;top:0;transition:background-color .15s,border-color .15s,transform .05s}.btn-duo:active{top:4px;border-bottom:0px solid transparent;margin-bottom:4px}.btn-duo:disabled{background-color:var(--surface-3)!important;border-bottom-color:var(--surface-2)!important;color:var(--text-dim)!important;cursor:not-allowed;top:0!important;margin-bottom:0!important}.btn-duo-outline{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-nunito);font-weight:800;font-size:16px;text-transform:uppercase;letter-spacing:.8px;padding:12px 26px;border-radius:16px;border:2px solid var(--border);background-color:var(--surface);color:var(--text-muted);border-bottom:5px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none;position:relative;top:0;transition:all .15s}.btn-duo-outline:hover{background-color:var(--surface-2);color:var(--text)}.btn-duo-outline:active{top:3px;border-bottom:2px solid var(--border);margin-bottom:3px}.btn-duo-blue{background-color:var(--blue);border-bottom-color:var(--blue-dark)}.btn-duo-purple{background-color:var(--purple);border-bottom-color:var(--purple-dark)}.btn-duo-wrong{background-color:var(--wrong);border-bottom-color:var(--wrong-dark)}.btn-duo-warn{background-color:var(--warn);border-bottom-color:var(--warn-dark)}@keyframes breathe{0%{transform:scale(1)}50%{transform:scale(1.03)}to{transform:scale(1)}}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-6px)}to{transform:translateY(0)}}.pet-breathe{animation:breathe 3s ease-in-out infinite}.floating-widget{animation:float 4s ease-in-out infinite}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 40px;background-color:var(--surface);border-bottom:2px solid var(--border);position:sticky;top:0;z-index:5}.topbar-stats{display:flex;align-items:center;gap:20px}.stat-badge{display:flex;align-items:center;gap:8px;font-family:var(--font-outfit);font-weight:800;font-size:16px;padding:6px 12px;border-radius:999px;background-color:var(--surface-2);border:1.5px solid var(--border)}.stat-badge.streak{color:var(--warn-dark);background-color:var(--warn-bg);border-color:var(--warn)}.stat-badge.xp{color:var(--brand-dark);background-color:var(--brand-bg);border-color:var(--brand)}.stat-badge.lives{color:var(--wrong);background-color:var(--wrong-bg);border-color:var(--wrong)}.subject-selector{-webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:var(--font-nunito);font-weight:800;font-size:15px;padding:8px 36px 8px 16px;border-radius:12px;border:2px solid var(--border);background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236B7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E") no-repeat right 12px center;background-size:16px;cursor:pointer}.subject-selector:focus{outline:none;border-color:var(--brand)}.roadmap-container{display:flex;flex-direction:column;gap:32px;width:100%}.unit-banner{background:linear-gradient(135deg,var(--brand),var(--brand-dark));border-radius:20px;padding:24px;color:#fff;display:flex;align-items:center;gap:20px;box-shadow:0 8px 24px var(--shadow-glow)}.unit-banner.locked{background:linear-gradient(135deg,#475569,#1e293b)!important;box-shadow:none!important;opacity:.7}.unit-icon{font-size:40px;background:#fff3;border-radius:16px;width:72px;height:72px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.unit-info h2{font-family:var(--font-outfit);font-weight:800;font-size:20px}.unit-info p{font-size:14px;opacity:.9;margin-top:4px}.unit-progress-bar{height:6px;width:160px;background:#ffffff4d;border-radius:3px;margin-top:8px;overflow:hidden}.unit-progress-fill{height:100%;background:#fff;border-radius:3px}.lessons-grid{display:flex;justify-content:center;flex-wrap:wrap;gap:20px;padding:16px 0}.lesson-node{width:76px;height:76px;border-radius:50%;border:none;background-color:var(--surface);border-bottom:6px solid var(--border);box-shadow:0 4px 0 var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;position:relative;top:0;transition:transform .15s,border-bottom .1s,top .05s}.lesson-node:hover{transform:scale(1.08)}.lesson-node:active{top:4px;border-bottom:2px solid var(--border)}.lesson-node.completed{background-color:var(--brand);border-bottom-color:var(--brand-dark);color:#fff}.lesson-node.challenge{background-color:var(--purple);border-bottom-color:var(--purple-dark);color:#fff;border-radius:20px}.node-icon{font-size:24px}.node-label{font-family:var(--font-nunito);font-weight:800;font-size:10px;text-transform:uppercase;margin-top:2px}.pet-widget{display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px}.pet-sprite-container{width:140px;height:140px;display:flex;align-items:center;justify-content:center;position:relative;background-color:var(--surface-2);border-radius:50%;border:3px dashed var(--border);margin-bottom:16px}.pet-sprite{font-size:80px;-webkit-user-select:none;user-select:none}.pet-accessory{position:absolute;top:10px;font-size:28px}.pet-name{font-family:var(--font-outfit);font-weight:800;font-size:20px}.pet-stage{font-size:12px;color:var(--brand-dark);background-color:var(--brand-bg);padding:2px 8px;border-radius:8px;font-weight:700;margin-top:4px;text-transform:uppercase}.pet-speech-bubble{background:var(--surface-2);border-radius:16px;padding:12px 16px;font-size:13px;font-weight:700;line-height:18px;color:var(--text-muted);position:relative;margin:16px 0;width:100%;border:1px solid var(--border)}.pet-speech-bubble:after{content:"";position:absolute;bottom:100%;left:50%;margin-left:-8px;border-width:8px;border-style:solid;border-color:transparent transparent var(--surface-2) transparent}.pet-stats{width:100%;display:flex;flex-direction:column;gap:8px}.pet-stat-row{display:flex;align-items:center;gap:12px}.pet-stat-icon{font-size:18px;width:20px}.pet-progress-outer{flex-grow:1;height:10px;background-color:var(--surface-3);border-radius:5px;overflow:hidden}.pet-progress-inner{height:100%;border-radius:5px;transition:width .4s ease}.pet-progress-inner.hunger{background-color:var(--warn)}.pet-progress-inner.happiness{background-color:var(--blue)}.pet-interaction-buttons{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;margin-top:16px}.quiz-layout{display:flex;flex-direction:column;height:100vh;width:100vw;background-color:var(--bg)}.quiz-header{height:72px;padding:0 40px;display:flex;align-items:center;gap:24px;border-bottom:2px solid var(--border);background-color:var(--surface)}.quiz-close{font-size:28px;border:none;background:transparent;color:var(--text-muted);cursor:pointer;display:flex;align-items:center}.quiz-progress-container{flex-grow:1;height:16px;background-color:var(--surface-2);border-radius:8px;overflow:hidden;border:1px solid var(--border)}.quiz-progress-fill{height:100%;background-color:var(--brand);border-radius:8px;transition:width .3s cubic-bezier(.34,1.56,.64,1)}.quiz-body{flex-grow:1;overflow-y:auto;padding:48px 40px;display:flex;flex-direction:column;align-items:center}.quiz-content-wrapper{max-width:760px;width:100%;display:flex;flex-direction:column;gap:28px}.question-text{font-family:var(--font-outfit);font-weight:800;font-size:24px;line-height:32px}.question-context{font-size:15px;color:var(--text-muted);background-color:var(--surface-2);padding:12px 16px;border-radius:12px;border-left:4px solid var(--blue);line-height:22px}.options-list{display:flex;flex-direction:column;gap:12px;margin-top:12px}.option-btn{background-color:var(--surface);border:2px solid var(--border);border-bottom:5px solid var(--border);border-radius:16px;padding:16px 20px;display:flex;align-items:center;gap:16px;cursor:pointer;text-align:left;-webkit-user-select:none;user-select:none;position:relative;top:0;transition:background-color .15s,border-color .15s,transform .05s}.option-btn:hover:not(.checked){border-color:var(--blue-dark);background-color:var(--surface-2)}.option-btn.selected{border-color:var(--blue);background-color:var(--blue-bg);border-bottom-color:var(--blue-dark);color:var(--blue-dark)}.option-btn:active{top:3px;border-bottom-width:2px}.option-number-badge{width:28px;height:28px;border-radius:8px;border:2.5px solid var(--border);display:flex;align-items:center;justify-content:center;font-family:var(--font-outfit);font-weight:800;font-size:14px;color:var(--text-muted)}.option-btn.selected .option-number-badge{border-color:var(--blue);background-color:var(--blue);color:#fff}.option-text{font-family:var(--font-nunito);font-weight:700;font-size:16px;line-height:22px}.quiz-footer{background-color:var(--surface);border-top:2px solid var(--border);padding:24px 40px;display:flex;justify-content:center;align-items:center}.quiz-footer-wrapper{max-width:760px;width:100%;display:flex;justify-content:space-between;align-items:center}.quiz-feedback-banner{width:100vw;position:absolute;bottom:0;left:0;padding:24px 40px;display:flex;justify-content:center;animation:slideUp .3s cubic-bezier(.34,1.56,.64,1)}.quiz-feedback-banner.correct{background-color:var(--correct-bg);border-top:2px solid var(--correct);color:var(--correct-dark)}.quiz-feedback-banner.wrong{background-color:var(--wrong-bg);border-top:2px solid var(--wrong);color:var(--wrong-dark)}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.feedback-wrapper{max-width:760px;width:100%;display:flex;justify-content:space-between;align-items:center}.feedback-message{display:flex;align-items:center;gap:16px}.feedback-icon{font-size:32px}.feedback-title{font-family:var(--font-outfit);font-weight:800;font-size:20px}.feedback-explanation{font-size:14px;margin-top:4px;font-weight:700}.hotkey-instruction{font-size:12px;color:var(--text-dim);font-weight:700;margin-top:12px;display:flex;align-items:center;justify-content:center;gap:6px}.hotkey-key{background-color:var(--surface-2);border:1px solid var(--border);border-bottom:2.5px solid var(--border);border-radius:4px;padding:2px 6px;font-family:monospace;font-size:11px}.auth-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.auth-hero{flex:1.2;background:linear-gradient(135deg,var(--blue-dark),var(--purple-dark));display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;padding:40px;position:relative}.auth-hero:after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background-image:radial-gradient(circle,rgba(255,255,255,.05) 1px,transparent 1px);background-size:24px 24px}.auth-logo-text{font-family:var(--font-outfit);font-weight:900;font-size:48px;letter-spacing:-1px;margin-top:16px}.auth-tagline{font-family:var(--font-nunito);font-weight:700;font-size:18px;opacity:.9;text-align:center;max-width:420px;margin-top:8px}.auth-form-container{flex:1;background-color:var(--surface);display:flex;flex-direction:column;justify-content:center;padding:60px;height:100%;overflow-y:auto;border-left:2px solid var(--border)}.auth-form-wrapper{max-width:400px;width:100%;margin:0 auto}.auth-form-title{font-family:var(--font-outfit);font-weight:800;font-size:28px;margin-bottom:24px;letter-spacing:-.5px}.auth-input-group{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.auth-input-group label{font-family:var(--font-nunito);font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted)}.auth-input{background-color:var(--bg);border:2px solid var(--border);border-radius:12px;padding:12px 16px;font-family:var(--font-nunito);font-weight:700;font-size:15px;transition:border-color .2s}.auth-input:focus{outline:none;border-color:var(--blue)}.auth-divider{display:flex;align-items:center;text-align:center;color:var(--text-dim);font-family:var(--font-nunito);font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:1px;margin:24px 0}.auth-divider:before,.auth-divider:after{content:"";flex:1;border-bottom:1.5px solid var(--border)}.auth-divider:not(:empty):before{margin-right:.5em}.auth-divider:not(:empty):after{margin-left:.5em}.profile-deck{display:flex;flex-direction:column;gap:20px}.settings-row{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1.5px solid var(--border)}.settings-row:last-child{border-bottom:none}.settings-info h3{font-family:var(--font-outfit);font-weight:800;font-size:16px}.settings-info p{font-size:13px;color:var(--text-muted);margin-top:2px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--surface-3);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}.floating-xp{position:absolute;color:var(--brand);font-family:var(--font-outfit);font-weight:900;font-size:24px;text-shadow:0 0 10px rgba(88,204,2,.6),0 2px 4px rgba(0,0,0,.2);pointer-events:none;animation:float-up-fade 1.2s ease-out forwards;z-index:9999}@keyframes float-up-fade{0%{transform:translateY(0) scale(.6);opacity:0}15%{transform:translateY(-20px) scale(1.2);opacity:1}to{transform:translateY(-90px) scale(.8);opacity:0}}.pet-quiz-companion{position:fixed;bottom:24px;right:24px;background:var(--surface);border:3px solid var(--border);border-radius:24px;padding:16px;box-shadow:0 10px 30px var(--shadow);display:flex;flex-direction:column;align-items:center;gap:8px;z-index:100;width:140px;animation:scale-up .3s cubic-bezier(.34,1.56,.64,1);transition:border-color .2s ease}.pet-quiz-companion.correct{border-color:var(--correct);animation:pet-happy .5s ease infinite alternate}.pet-quiz-companion.wrong{border-color:var(--wrong);animation:pet-shake .4s ease}.pet-quiz-sprite-container{font-size:48px;position:relative;width:60px;height:60px;display:flex;align-items:center;justify-content:center}.pet-quiz-bubble-speech{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:4px 8px;font-size:11px;font-weight:800;text-align:center;max-width:120px;line-height:14px;box-shadow:0 2px 5px var(--shadow)}@keyframes pet-happy{0%{transform:translateY(0) scale(1)}to{transform:translateY(-15px) scale(1.1)}}@keyframes pet-shake{0%,to{transform:translate(0)}25%{transform:translate(-6px) rotate(-5deg)}75%{transform:translate(6px) rotate(5deg)}}.streak-warning-banner{background:linear-gradient(135deg,var(--warn-bg),#fffbeb);border:2px dashed var(--warn);border-radius:16px;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 4px 15px #d977061a;animation:pulse-border 2s infinite alternate}[data-theme=dark] .streak-warning-banner{background:linear-gradient(135deg,#451a03,#1e1b4b);border-color:var(--warn)}@keyframes pulse-border{0%{box-shadow:0 4px 15px #d977061a}to{box-shadow:0 4px 20px #d977064d;border-color:#f97316}}.achievements-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin-top:16px}.achievement-card{background:var(--surface);border:2px solid var(--border);border-radius:16px;padding:16px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;position:relative;transition:all .25s cubic-bezier(.34,1.56,.64,1);box-shadow:0 4px 12px var(--shadow)}.achievement-card.locked{opacity:.65;filter:grayscale(1)}.achievement-card:hover:not(.locked){transform:translateY(-5px);box-shadow:0 8px 20px var(--shadow);border-color:var(--brand)}.achievement-badge-icon{font-size:40px;width:64px;height:64px;background:var(--surface-2);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 2px 4px #0000000f}.achievement-card:not(.locked) .achievement-badge-icon{background:linear-gradient(135deg,var(--brand-bg),#fff);box-shadow:0 4px 10px #58cc0233}.achievement-name{font-family:var(--font-outfit);font-weight:800;font-size:14px}.achievement-desc{font-size:11px;color:var(--text-muted);line-height:14px}.achievement-progress-container{width:100%;height:6px;background-color:var(--surface-3);border-radius:3px;overflow:hidden;margin-top:4px}.achievement-progress-bar{height:100%;background:var(--brand);border-radius:3px;transition:width .3s ease}.confetti-canvas-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;pointer-events:none;z-index:11000}.teacher-announcement-card{background:linear-gradient(135deg,var(--purple-bg),var(--blue-bg));border:2px solid var(--purple-dark);border-radius:20px;padding:24px;color:var(--text);box-shadow:0 8px 24px #a855f726;display:flex;align-items:flex-start;gap:16px;animation:scale-up .3s ease}[data-theme=dark] .teacher-announcement-card{background:linear-gradient(135deg,#1e1b4b,#0f172a);border-color:var(--purple)}.teacher-announcement-avatar{font-size:40px;background:var(--surface);border-radius:50%;width:60px;height:60px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px #0000001a;flex-shrink:0}.skeleton-box{background:linear-gradient(90deg,var(--surface-2) 25%,var(--surface-3) 50%,var(--surface-2) 75%);background-size:200% 100%;animation:loading-pulse 1.4s infinite linear;border-radius:8px;border:none!important}@keyframes loading-pulse{0%{background-position:200% 0}to{background-position:-200% 0}}.btn-duo:active,.btn-duo-outline:active,.sidebar-btn:active,.option-btn:active{transform:scale(.96) translateY(2px);transition:transform .05s ease}