@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&display=swap";:root{--bg-primary: #0f0e17;--bg-secondary: #1a1932;--bg-card: rgba(255, 255, 255, .06);--bg-card-hover: rgba(255, 255, 255, .1);--bg-glass: rgba(255, 255, 255, .08);--border-glass: rgba(255, 255, 255, .12);--text-primary: #fffffe;--text-secondary: #a7a9be;--text-muted: #72738c;--accent-purple: #6C63FF;--accent-pink: #FF6B9D;--accent-blue: #4ECDC4;--accent-orange: #F7B731;--accent-green: #20BF6B;--accent-red: #FC5C65;--gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-card: linear-gradient(135deg, rgba(108, 99, 255, .15), rgba(255, 107, 157, .08));--gradient-success: linear-gradient(135deg, #20BF6B 0%, #0a8f4e 100%);--gradient-danger: linear-gradient(135deg, #FC5C65 0%, #eb3b5a 100%);--math-color: #6C63FF;--math-gradient: linear-gradient(135deg, #6C63FF 0%, #4834d4 100%);--math-bg: rgba(108, 99, 255, .12);--deutsch-color: #FF6B6B;--deutsch-gradient: linear-gradient(135deg, #FF6B6B 0%, #ee5a24 100%);--deutsch-bg: rgba(255, 107, 107, .12);--english-color: #20BF6B;--english-gradient: linear-gradient(135deg, #20BF6B 0%, #0a8f4e 100%);--english-bg: rgba(32, 191, 107, .12);--nmg-color: #F7B731;--nmg-gradient: linear-gradient(135deg, #F7B731 0%, #e67e22 100%);--nmg-bg: rgba(247, 183, 49, .12);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 50%;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 20px rgba(108, 99, 255, .3);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--font-family: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif}[data-theme=light]{--bg-primary: #f5f3ff;--bg-secondary: #ede9fe;--bg-card: rgba(0, 0, 0, .03);--bg-card-hover: rgba(0, 0, 0, .06);--bg-glass: rgba(0, 0, 0, .04);--border-glass: rgba(0, 0, 0, .1);--text-primary: #1e1b4b;--text-secondary: #4c4f69;--text-muted: #7c7f9b;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);--shadow-glow: 0 0 20px rgba(108, 99, 255, .15)}[data-theme=light] body:before{background:radial-gradient(ellipse at 20% 50%,rgba(108,99,255,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(255,107,157,.04) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(78,205,196,.04) 0%,transparent 50%)}[data-theme=light] .modal{background:#f0ecfe}[data-theme=light] .login-toggle button,[data-theme=light] a{color:#5b54d4}[data-theme=light] .login-toggle button:hover,[data-theme=light] a:hover{color:#e0429a}[data-theme=light] .text-gradient{background:linear-gradient(135deg,#5b54d4,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}[data-theme=light] .card-glass{background:#ffffffb3;border:1px solid rgba(0,0,0,.08);box-shadow:0 4px 24px #0000000f}[data-theme=light] .input{background:#fffc;border:1px solid rgba(0,0,0,.12);color:var(--text-primary)}[data-theme=light] .input::placeholder{color:#9ca3af}[data-theme=light] .btn-primary{box-shadow:0 4px 15px #667eea4d}[data-theme=light] .btn-secondary{background:#fff9;border:1px solid rgba(0,0,0,.1)}[data-theme=light] select.input{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%234c4f69' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E")}.theme-toggle{background:var(--bg-card);border:1px solid var(--border-glass);width:44px;height:44px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.3rem;transition:all var(--transition-normal);color:var(--text-primary);flex-shrink:0}.theme-toggle:hover{background:var(--bg-card-hover);border-color:var(--accent-purple);transform:scale(1.08)}.theme-toggle:active{transform:scale(.95)}.password-wrapper{position:relative;width:100%}.password-wrapper .input{padding-right:48px}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:1.2rem;padding:4px;display:flex;align-items:center;justify-content:center;transition:color var(--transition-fast);line-height:1}.password-toggle:hover{color:var(--accent-purple)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;display:flex;flex-direction:column}body:before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse at 20% 50%,rgba(108,99,255,.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(255,107,157,.06) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(78,205,196,.05) 0%,transparent 50%);pointer-events:none;z-index:0}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}p{line-height:1.6;color:var(--text-secondary)}a{color:var(--accent-purple);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-pink)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-family:var(--font-family);font-size:1rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-normal);text-decoration:none;position:relative;overflow:hidden;white-space:nowrap}.btn:after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.1),transparent);opacity:0;transition:opacity var(--transition-fast)}.btn:hover:after{opacity:1}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-hero);color:#fff;box-shadow:0 4px 15px #667eea66}.btn-primary:hover{box-shadow:0 6px 20px #667eea99;transform:translateY(-2px)}.btn-secondary{background:var(--bg-glass);color:var(--text-primary);border:1px solid var(--border-glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--accent-purple)}.btn-success{background:var(--gradient-success);color:#fff;box-shadow:0 4px 15px #20bf6b66}.btn-danger{background:var(--gradient-danger);color:#fff}.btn-lg{padding:var(--space-lg) var(--space-2xl);font-size:1.125rem;border-radius:var(--radius-lg)}.btn-sm{padding:var(--space-sm) var(--space-md);font-size:.875rem}.btn-icon{width:44px;height:44px;padding:0;border-radius:var(--radius-full)}.card{background:var(--bg-card);border:1px solid var(--border-glass);border-radius:var(--radius-lg);padding:var(--space-xl);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);transition:all var(--transition-normal)}.card:hover{background:var(--bg-card-hover);border-color:#fff3;transform:translateY(-2px);box-shadow:var(--shadow-md)}.card-glass{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-xl);padding:var(--space-2xl);-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px)}.input-group{display:flex;flex-direction:column;gap:var(--space-sm)}.input-group label{font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.input{width:100%;padding:var(--space-md) var(--space-lg);background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-family);font-size:1rem;transition:all var(--transition-fast);outline:none}.input:focus{border-color:var(--accent-purple);box-shadow:0 0 0 3px #6c63ff26}.input::placeholder{color:var(--text-muted)}select.input{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23a7a9be' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:40px}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes glow{0%,to{box-shadow:0 0 5px #6c63ff4d}50%{box-shadow:0 0 20px #6c63ff99,0 0 40px #6c63ff4d}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes confettiDrop{0%{transform:translateY(-100vh) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}@keyframes xpPop{0%{transform:scale(0) translateY(0);opacity:0}50%{transform:scale(1.3) translateY(-20px);opacity:1}to{transform:scale(1) translateY(-40px);opacity:0}}@keyframes starBurst{0%{transform:scale(0) rotate(0);opacity:1}to{transform:scale(2) rotate(180deg);opacity:0}}.animate-fade-in{animation:fadeIn .5s ease forwards}.animate-slide-up{animation:slideUp .6s ease forwards}.animate-bounce{animation:bounce 2s ease-in-out infinite}.animate-pulse{animation:pulse 2s ease-in-out infinite}.animate-float{animation:float 3s ease-in-out infinite}.text-center{text-align:center}.text-gradient{background:var(--gradient-hero);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--space-sm)}.gap-md{gap:var(--space-md)}.gap-lg{gap:var(--space-lg)}.gap-xl{gap:var(--space-xl)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-xl);position:relative;z-index:1}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-xl);position:relative}.login-container{width:100%;max-width:440px;animation:fadeIn .6s ease}.login-header{text-align:center;margin-bottom:var(--space-2xl)}.login-logo{font-size:4rem;margin-bottom:var(--space-md);animation:float 3s ease-in-out infinite;display:block}.login-title{font-size:2rem;font-weight:800;margin-bottom:var(--space-sm)}.login-subtitle{color:var(--text-secondary);font-size:1rem}.login-form{display:flex;flex-direction:column;gap:var(--space-lg)}.login-error{background:#fc5c651a;border:1px solid rgba(252,92,101,.3);border-radius:var(--radius-md);padding:var(--space-md);color:var(--accent-red);font-size:.875rem;text-align:center}.login-toggle{text-align:center;color:var(--text-secondary);font-size:.9rem}.login-toggle button{background:none;border:none;color:var(--accent-purple);font-family:var(--font-family);font-size:.9rem;font-weight:600;cursor:pointer;padding:0;margin-left:4px}.login-toggle button:hover{color:var(--accent-pink)}.select-student-page{min-height:100vh;padding:var(--space-2xl) var(--space-xl)}.select-student-header{text-align:center;margin-bottom:var(--space-2xl)}.select-student-title{font-size:2.25rem;font-weight:800;margin-bottom:var(--space-sm)}.students-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-lg);max-width:900px;margin:0 auto var(--space-2xl)}.student-card{background:var(--bg-card);border:2px solid var(--border-glass);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;cursor:pointer;transition:all var(--transition-normal);animation:scaleIn .4s ease forwards;opacity:0}.student-card:hover{background:var(--bg-card-hover);border-color:var(--accent-purple);transform:translateY(-4px);box-shadow:var(--shadow-glow)}.student-card-avatar{font-size:4rem;margin-bottom:var(--space-md);display:block}.student-card-name{font-size:1.25rem;font-weight:700;margin-bottom:var(--space-xs)}.student-card-grade{color:var(--text-secondary);font-size:.875rem}.student-card-level{margin-top:var(--space-sm);font-size:.8rem;color:var(--accent-purple);font-weight:600}.add-student-card{background:transparent;border:2px dashed var(--border-glass);display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:200px}.add-student-card:hover{border-color:var(--accent-purple);background:#6c63ff0d}.add-student-icon{font-size:3rem;color:var(--text-muted);margin-bottom:var(--space-sm)}.modal-overlay{position:fixed;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-xl);animation:fadeIn .2s ease}.modal{background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:var(--radius-xl);padding:var(--space-2xl);width:100%;max-width:500px;max-height:90vh;overflow-y:auto;animation:scaleIn .3s ease}.modal-title{font-size:1.5rem;font-weight:700;margin-bottom:var(--space-xl);text-align:center}.avatar-picker{display:grid;grid-template-columns:repeat(6,1fr);gap:var(--space-sm);margin-bottom:var(--space-lg)}.avatar-option{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:2rem;background:var(--bg-card);border:2px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.avatar-option:hover{background:var(--bg-card-hover);transform:scale(1.1)}.avatar-option.selected{border-color:var(--accent-purple);background:#6c63ff26;box-shadow:var(--shadow-glow)}.modal-actions{display:flex;gap:var(--space-md);margin-top:var(--space-xl)}.modal-actions .btn{flex:1}.logout-bar{display:flex;justify-content:flex-end;padding:var(--space-md) var(--space-xl)}.dashboard-page{min-height:100vh;padding:0 var(--space-xl) var(--space-2xl)}.navbar{display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg) 0;margin-bottom:var(--space-lg);position:relative;z-index:10}.navbar-left{display:flex;align-items:center;gap:var(--space-md)}.navbar-avatar{font-size:2rem;background:var(--bg-card);border:2px solid var(--border-glass);width:48px;height:48px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.navbar-avatar:hover{border-color:var(--accent-purple);transform:scale(1.05)}.navbar-info{display:flex;flex-direction:column}.navbar-name{font-size:1rem;font-weight:700}.navbar-level{font-size:.8rem;color:var(--accent-purple);font-weight:500}.navbar-right{display:flex;align-items:center;gap:var(--space-lg)}.navbar-stat{display:flex;align-items:center;gap:var(--space-sm);background:var(--bg-card);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);border:1px solid var(--border-glass)}.navbar-stat-icon{font-size:1.2rem}.navbar-stat-value{font-weight:700;font-size:.9rem}.navbar-stat-label{font-size:.75rem;color:var(--text-muted)}.welcome-section{text-align:center;margin-bottom:var(--space-2xl);animation:fadeIn .5s ease}.welcome-greeting{font-size:1.5rem;color:var(--text-secondary);margin-bottom:var(--space-sm)}.welcome-name{font-size:2.5rem;font-weight:800;margin-bottom:var(--space-md)}.xp-bar-container{max-width:500px;margin:0 auto var(--space-2xl);animation:fadeIn .6s ease}.xp-bar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-sm)}.xp-bar-level{font-size:.875rem;font-weight:600;color:var(--accent-purple)}.xp-bar-progress{font-size:.8rem;color:var(--text-muted)}.xp-bar{width:100%;height:12px;background:var(--bg-glass);border-radius:6px;overflow:hidden;border:1px solid var(--border-glass)}.xp-bar-fill{height:100%;background:var(--gradient-hero);border-radius:6px;transition:width .8s cubic-bezier(.4,0,.2,1);position:relative}.xp-bar-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);background-size:200% 100%;animation:shimmer 2s infinite}.subjects-section{margin-bottom:var(--space-2xl)}.subjects-title{font-size:1.25rem;font-weight:700;margin-bottom:var(--space-lg);display:flex;align-items:center;gap:var(--space-sm)}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--space-lg)}.subject-card{background:var(--bg-card);border:1px solid var(--border-glass);border-radius:var(--radius-xl);padding:var(--space-xl);cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden;animation:slideUp .5s ease forwards;opacity:0}.subject-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;border-radius:var(--radius-xl) var(--radius-xl) 0 0}.subject-card.math:before{background:var(--math-gradient)}.subject-card.deutsch:before{background:var(--deutsch-gradient)}.subject-card.english:before{background:var(--english-gradient)}.subject-card.nmg:before{background:var(--nmg-gradient)}.subject-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.subject-card.math:hover{border-color:var(--math-color);box-shadow:0 0 20px #6c63ff33}.subject-card.deutsch:hover{border-color:var(--deutsch-color);box-shadow:0 0 20px #ff6b6b33}.subject-card.english:hover{border-color:var(--english-color);box-shadow:0 0 20px #20bf6b33}.subject-card.nmg:hover{border-color:var(--nmg-color);box-shadow:0 0 20px #f7b73133}.subject-card-emoji{font-size:3rem;margin-bottom:var(--space-md);display:block}.subject-card-name{font-size:1.25rem;font-weight:700;margin-bottom:var(--space-sm)}.subject-card-desc{font-size:.85rem;color:var(--text-secondary);margin-bottom:var(--space-lg)}.subject-card-progress{display:flex;align-items:center;gap:var(--space-sm)}.subject-progress-bar{flex:1;height:6px;background:var(--bg-glass);border-radius:3px;overflow:hidden}.subject-progress-fill{height:100%;border-radius:3px;transition:width .6s ease}.subject-progress-fill.math{background:var(--math-gradient)}.subject-progress-fill.deutsch{background:var(--deutsch-gradient)}.subject-progress-fill.english{background:var(--english-gradient)}.subject-progress-fill.nmg{background:var(--nmg-gradient)}.subject-progress-text{font-size:.75rem;color:var(--text-muted);font-weight:600;min-width:30px;text-align:right}.subject-locked{opacity:.5;cursor:not-allowed}.subject-locked-badge{position:absolute;top:var(--space-md);right:var(--space-md);background:#00000080;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);font-size:.75rem;color:var(--text-muted)}.badges-section{margin-bottom:var(--space-2xl)}.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--space-md)}.badge-item{background:var(--bg-card);border:1px solid var(--border-glass);border-radius:var(--radius-lg);padding:var(--space-lg);text-align:center;transition:all var(--transition-normal)}.badge-item.earned{border-color:var(--accent-purple);background:#6c63ff0f}.badge-item.locked{opacity:.4;filter:grayscale(.8)}.badge-emoji{font-size:2rem;margin-bottom:var(--space-sm);display:block}.badge-name{font-size:.8rem;font-weight:600}.badge-desc{font-size:.7rem;color:var(--text-muted);margin-top:var(--space-xs)}.exercise-page{min-height:100vh;padding:var(--space-xl)}.exercise-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-2xl)}.exercise-back{background:var(--bg-card);border:1px solid var(--border-glass);width:44px;height:44px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;transition:all var(--transition-fast);color:var(--text-primary)}.exercise-back:hover{background:var(--bg-card-hover);border-color:var(--accent-purple)}.exercise-subject-name{font-size:1.25rem;font-weight:700}.exercise-counter{font-size:.9rem;color:var(--text-secondary);font-weight:600}.exercise-progress{width:100%;max-width:600px;height:8px;background:var(--bg-glass);border-radius:4px;margin:0 auto var(--space-2xl);overflow:hidden}.exercise-progress-fill{height:100%;border-radius:4px;transition:width .4s ease}.exercise-card{max-width:700px;margin:0 auto;animation:fadeIn .4s ease}.exercise-question{font-size:1.5rem;font-weight:700;text-align:center;margin-bottom:var(--space-2xl);line-height:1.4}.exercise-hint{text-align:center;font-size:.9rem;color:var(--text-muted);margin-bottom:var(--space-xl);font-style:italic}.choices-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);margin-bottom:var(--space-xl)}.choice-btn{background:var(--bg-card);border:2px solid var(--border-glass);border-radius:var(--radius-lg);padding:var(--space-lg) var(--space-xl);cursor:pointer;transition:all var(--transition-normal);font-family:var(--font-family);font-size:1.1rem;font-weight:500;color:var(--text-primary);text-align:center;min-height:60px;display:flex;align-items:center;justify-content:center}.choice-btn:hover:not(.disabled){background:var(--bg-card-hover);border-color:var(--accent-purple);transform:translateY(-2px)}.choice-btn.correct{border-color:var(--accent-green);background:#20bf6b26;animation:pulse .5s ease}.choice-btn.wrong{border-color:var(--accent-red);background:#fc5c6526}.choice-btn.disabled{cursor:default;opacity:.7}.exercise-input-container{max-width:400px;margin:0 auto var(--space-xl);text-align:center}.exercise-input{width:100%;padding:var(--space-lg) var(--space-xl);background:var(--bg-glass);border:2px solid var(--border-glass);border-radius:var(--radius-lg);color:var(--text-primary);font-family:var(--font-family);font-size:1.5rem;font-weight:600;text-align:center;outline:none;transition:all var(--transition-fast)}.exercise-input:focus{border-color:var(--accent-purple);box-shadow:0 0 0 4px #6c63ff26}.exercise-input.correct{border-color:var(--accent-green);box-shadow:0 0 0 4px #20bf6b26}.exercise-input.wrong{border-color:var(--accent-red);box-shadow:0 0 0 4px #fc5c6526}.exercise-feedback{text-align:center;margin:var(--space-xl) 0;padding:var(--space-lg);border-radius:var(--radius-lg);animation:scaleIn .3s ease}.exercise-feedback.correct{background:#20bf6b1a;border:1px solid rgba(32,191,107,.3)}.exercise-feedback.wrong{background:#fc5c651a;border:1px solid rgba(252,92,101,.3)}.feedback-icon{font-size:2.5rem;display:block;margin-bottom:var(--space-sm)}.feedback-text{font-size:1.1rem;font-weight:600}.feedback-explanation{font-size:.9rem;color:var(--text-secondary);margin-top:var(--space-sm)}.exercise-actions{display:flex;justify-content:center;margin-top:var(--space-xl)}.exercise-summary{max-width:500px;margin:0 auto;text-align:center;animation:fadeIn .5s ease}.summary-emoji{font-size:5rem;display:block;margin-bottom:var(--space-lg);animation:bounce 1s ease}.summary-title{font-size:2rem;font-weight:800;margin-bottom:var(--space-sm)}.summary-subtitle{color:var(--text-secondary);margin-bottom:var(--space-2xl)}.summary-stats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--space-md);margin-bottom:var(--space-2xl)}.summary-stat{background:var(--bg-card);border:1px solid var(--border-glass);border-radius:var(--radius-lg);padding:var(--space-lg)}.summary-stat-value{font-size:2rem;font-weight:800;display:block}.summary-stat-value.xp{color:var(--accent-purple)}.summary-stat-label{font-size:.8rem;color:var(--text-muted)}.summary-badges{margin-bottom:var(--space-2xl)}.new-badge-card{background:#6c63ff1a;border:1px solid rgba(108,99,255,.3);border-radius:var(--radius-xl);padding:var(--space-xl);margin-bottom:var(--space-md);animation:glow 2s ease infinite}.new-badge-emoji{font-size:3rem;display:block;margin-bottom:var(--space-sm)}.new-badge-name{font-size:1.2rem;font-weight:700}.new-badge-desc{font-size:.85rem;color:var(--text-secondary)}.reward-overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:2000;pointer-events:none}.xp-popup{font-size:2rem;font-weight:800;color:var(--accent-purple);animation:xpPop 1.5s ease forwards;pointer-events:none}.level-up-overlay{position:fixed;inset:0;background:#000c;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:3000;animation:fadeIn .3s ease}.level-up-text{font-size:3rem;font-weight:900;margin-bottom:var(--space-md);animation:bounce 1s ease infinite}.level-up-number{font-size:6rem;font-weight:900;background:var(--gradient-hero);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:pulse 1.5s ease infinite}.level-up-title{font-size:1.5rem;color:var(--text-secondary);margin-top:var(--space-md)}.confetti-container{position:fixed;inset:0;pointer-events:none;z-index:9999;overflow:hidden}.confetti-piece{position:absolute;width:10px;height:10px;top:-10px;animation:confettiDrop linear forwards}input,select,textarea{font-size:16px!important}@media(hover:none)and (pointer:coarse){.subject-card:hover,.card:hover,.student-card:hover{transform:none;box-shadow:none}.subject-card:active,.card:active,.student-card:active,.choice-btn:active,.btn:active{transform:scale(.97);opacity:.9}.btn-sm{min-height:44px;padding:var(--space-sm) var(--space-md)}*{-webkit-tap-highlight-color:transparent}}@supports (padding: env(safe-area-inset-top)){.login-page,.select-student-page,.dashboard-page,.exercise-page{padding-top:max(var(--space-xl),env(safe-area-inset-top));padding-bottom:max(var(--space-xl),env(safe-area-inset-bottom));padding-left:max(var(--space-xl),env(safe-area-inset-left));padding-right:max(var(--space-xl),env(safe-area-inset-right))}}@media(min-width:768px)and (max-width:1024px){.container{padding:0 var(--space-xl)}.navbar,.navbar-right{gap:var(--space-sm)}.navbar-stat{padding:var(--space-xs) var(--space-sm)}.navbar-stat-value{font-size:.85rem}.navbar-stat-label{font-size:.7rem}.subjects-grid{grid-template-columns:repeat(2,1fr);gap:var(--space-md)}.students-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--space-md)}.exercise-card{max-width:600px}.exercise-question{font-size:1.35rem}.badges-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.choices-grid{grid-template-columns:1fr 1fr}.modal{max-width:480px}}@media(min-width:1024px)and (max-width:1366px){.subjects-grid{grid-template-columns:repeat(2,1fr)}.exercise-card{max-width:650px}}@media(max-width:768px){h1{font-size:1.75rem}h2{font-size:1.5rem}.container{padding:0 var(--space-md)}.login-page{padding:var(--space-md);align-items:flex-start;padding-top:var(--space-xl)}.login-header{margin-bottom:var(--space-lg)}.login-logo{font-size:3rem;margin-bottom:var(--space-sm)}.login-title{font-size:1.75rem}.login-subtitle{font-size:.9rem}.card-glass{padding:var(--space-lg)}.navbar{flex-wrap:wrap;gap:var(--space-sm);padding:var(--space-md) 0}.navbar-right{width:100%;justify-content:center;flex-wrap:wrap;gap:var(--space-sm)}.navbar-left{width:100%;justify-content:center}.navbar-stat{padding:var(--space-xs) var(--space-sm)}.subjects-grid{grid-template-columns:1fr 1fr}.subject-card{padding:var(--space-lg)}.subject-card-emoji{font-size:2.5rem}.subject-card-name{font-size:1.1rem}.subject-card-desc{font-size:.8rem}.exercise-header{margin-bottom:var(--space-lg)}.exercise-question{font-size:1.25rem;margin-bottom:var(--space-lg)}.exercise-input{font-size:1.25rem}.choices-grid{grid-template-columns:1fr;gap:var(--space-sm)}.choice-btn{padding:var(--space-md) var(--space-lg);min-height:52px;font-size:1rem}.students-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.student-card{padding:var(--space-lg)}.student-card-avatar{font-size:3rem}.badges-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}.welcome-name{font-size:1.75rem}.welcome-greeting{font-size:1.2rem}.xp-bar-container{max-width:100%}.summary-stats{grid-template-columns:1fr}.summary-emoji{font-size:4rem}.summary-title{font-size:1.5rem}.avatar-picker{grid-template-columns:repeat(4,1fr)}.select-student-title{font-size:1.75rem}.modal{max-width:100%;border-radius:var(--radius-lg);padding:var(--space-lg)}.modal-overlay{padding:var(--space-md)}.theme-toggle{width:38px;height:38px;font-size:1.1rem}}@media(max-width:480px){.subjects-grid{grid-template-columns:1fr}.exercise-subject-name{font-size:1rem}.exercise-counter{font-size:.8rem}.login-container{max-width:100%}.students-grid{grid-template-columns:1fr 1fr;gap:var(--space-sm)}.student-card{padding:var(--space-md)}.student-card-avatar{font-size:2.5rem}.student-card-name{font-size:1rem}.feedback-icon{font-size:2rem}.feedback-text{font-size:1rem}}@media(max-height:500px)and (orientation:landscape){.login-page{align-items:flex-start;padding-top:var(--space-md)}.login-logo{font-size:2rem;margin-bottom:var(--space-xs)}.login-title{font-size:1.5rem}.login-header{margin-bottom:var(--space-sm)}.card-glass{padding:var(--space-md)}.login-form{gap:var(--space-sm)}}