@import url(https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap);@import url(https://fonts.googleapis.com/css2?family=Dancing+Script:wght@400;500;600;700&display=swap);@import url(https://fonts.googleapis.com/css2?family=Kaushan+Script&display=swap);@import url(https://fonts.googleapis.com/css2?family=Pacifico&display=swap);body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}*{box-sizing:border-box;margin:0;padding:0}:root{--primary-purple:#6b46c1;--dark-purple:#4c1d95;--light-purple:#a78bfa;--primary-orange:#ea580c;--dark-orange:#c2410c;--light-orange:#fb923c;--black:#0f0f23;--dark-gray:#1a1a2e;--medium-gray:#16213e;--light-gray:#e5e7eb;--white:#fff;--sky-blue:#87ceeb;--light-sky-blue:#b0e0e6;--dark-sky-blue:#4682b4;--text-primary:#87ceeb;--text-secondary:#b0e0e6;--text-muted:#4682b4;--glass-bg:#ffffff1a;--glass-bg-strong:#ffffff26;--glass-border:#fff3;--shadow-light:#6b46c14d;--shadow-orange:#ea580c4d}body{background:linear-gradient(135deg,#0f0f23,#4c1d95 50%,#c2410c);background:linear-gradient(135deg,var(--black) 0,var(--dark-purple) 50%,var(--dark-orange) 100%);color:#87ceeb;color:var(--sky-blue);font-family:Dancing Script,cursive;min-height:100vh;overflow-x:hidden}*,h1,h2,h3,h4,h5,h6{color:#87ceeb!important;color:var(--sky-blue)!important}h1,h2,h3,h4,h5,h6{font-family:Kaushan Script,cursive!important;text-shadow:0 0 15px #87ceeb,0 2px 4px #00000080!important;text-shadow:0 0 15px var(--sky-blue),0 2px 4px #00000080!important}.auth-card,.auth-card *,.btn,.btn *,.file-upload,.file-upload *,.navbar,.navbar *{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Dancing Script,cursive!important;font-weight:500!important;text-shadow:0 1px 2px #0000004d!important}input::placeholder,textarea::placeholder{color:#4682b4!important;color:var(--dark-sky-blue)!important;font-family:Dancing Script,cursive!important}.App{background:linear-gradient(135deg,#0f0f23,#4c1d95 50%,#c2410c);background:linear-gradient(135deg,var(--black) 0,var(--dark-purple) 50%,var(--dark-orange) 100%);min-height:100vh;overflow-x:hidden;position:relative;transition:all .3s ease}.App:before{background:radial-gradient(circle at 20% 80%,#6b46c14d 0,#0000 50%),radial-gradient(circle at 80% 20%,#ea580c4d 0,#0000 50%),radial-gradient(circle at 40% 40%,#8b5cf633 0,#0000 50%);content:"";height:100%;left:0;pointer-events:none;position:fixed;top:0;width:100%;z-index:-1}.App.dark-mode{background:linear-gradient(135deg,#000,#4c1d95 50%,#c2410c);background:linear-gradient(135deg,#000 0,var(--dark-purple) 50%,var(--dark-orange) 100%)}.main-content{margin:0 auto;max-width:1400px;overflow-x:hidden;padding:2rem;position:relative;width:100%;z-index:1}.glass{backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:20px;box-shadow:0 8px 32px #0000004d,inset 0 1px 0 #fff3}.glass-strong{backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px);background:#ffffff26;border:1px solid #ffffff4d;border-radius:24px;box-shadow:0 12px 40px #0006,inset 0 1px 0 #ffffff4d}.navbar{align-items:center;animation:slideDown .6s ease-out;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);box-shadow:0 8px 32px #0000004d,inset 0 1px 0 #fff3;display:flex;justify-content:space-between;margin-bottom:2rem;padding:1.5rem 2rem;position:-webkit-sticky;position:sticky;top:0;z-index:100}.navbar-brand{color:#87ceeb;color:var(--sky-blue);font-family:Pacifico,cursive;font-size:2rem;font-weight:400;text-shadow:0 0 20px #87ceeb,0 2px 4px #00000080;text-shadow:0 0 20px var(--sky-blue),0 2px 4px #00000080;transition:all .3s ease}.navbar-brand:hover{filter:drop-shadow(0 0 20px rgba(107,70,193,.3));filter:drop-shadow(0 0 20px var(--shadow-light));transform:scale(1.05)}.navbar-nav{align-items:center;display:flex;gap:1rem;list-style:none}.nav-item{border-radius:15px;color:#87ceeb;color:var(--sky-blue);cursor:pointer;font-family:Dancing Script,cursive;font-size:1.2rem;font-weight:600;overflow:hidden;padding:.75rem 1.5rem;position:relative;text-shadow:0 2px 4px #0000004d;transition:all .3s cubic-bezier(.4,0,.2,1)}.nav-item:before{background:linear-gradient(90deg,#0000,#fff3,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left .5s;width:100%}.nav-item:hover:before{left:100%}.nav-item:hover{background:#ffffff1a;box-shadow:0 8px 25px #6b46c14d;transform:translateY(-2px)}.nav-item.active{background:linear-gradient(135deg,#6b46c1,#ea580c);background:linear-gradient(135deg,var(--primary-purple),var(--primary-orange));box-shadow:0 8px 25px #6b46c14d,inset 0 1px 0 #ffffff4d;box-shadow:0 8px 25px var(--shadow-light),inset 0 1px 0 #ffffff4d;transform:translateY(-2px)}.dark-mode-toggle{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;color:#87ceeb;color:var(--sky-blue);cursor:pointer;font-size:1.2rem;overflow:hidden;padding:.75rem;position:relative;transition:all .3s ease}.dark-mode-toggle:hover{background:#ea580c33;box-shadow:0 8px 25px #ea580c4d;box-shadow:0 8px 25px var(--shadow-orange);transform:scale(1.1) rotate(10deg)}.card{animation:fadeInUp .6s ease-out;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:24px;box-shadow:0 12px 40px #0006,inset 0 1px 0 #fff3;color:#87ceeb;color:var(--text-primary);margin-bottom:2rem;overflow:hidden;padding:2.5rem;position:relative;transition:all .4s cubic-bezier(.4,0,.2,1)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.card:before{background:linear-gradient(90deg,#6b46c1,#ea580c);background:linear-gradient(90deg,var(--primary-purple),var(--primary-orange));content:"";height:2px;left:0;position:absolute;right:0;top:0;transform:scaleX(0);transition:transform .3s ease}.card:hover:before{transform:scaleX(1)}.card:hover{border-color:#6b46c180;box-shadow:0 20px 60px #00000080,0 0 40px #6b46c14d,inset 0 1px 0 #ffffff4d;box-shadow:0 20px 60px #00000080,0 0 40px var(--shadow-light),inset 0 1px 0 #ffffff4d;transform:translateY(-8px)}.card h2,.card h3{color:#87ceeb;color:var(--sky-blue);font-family:Kaushan Script,cursive;font-size:2rem;font-weight:400;margin-bottom:1.5rem;text-shadow:0 0 15px #87ceeb,0 2px 4px #00000080;text-shadow:0 0 15px var(--sky-blue),0 2px 4px #00000080}.card h3{font-size:1.6rem}.flashcard-container *,.quiz-container *,.summary-container *{color:#0f0f23!important;color:var(--black)!important;font-family:Inter,sans-serif!important;font-weight:400!important;text-shadow:0 1px 2px #0000004d!important}.flashcard-container h2,.flashcard-container h3,.quiz-container h2,.quiz-container h3,.summary-container h2,.summary-container h3{font-family:Kaushan Script,cursive!important}.btn{border:none;border-radius:15px;cursor:pointer;font-family:Dancing Script,cursive;font-size:1.3rem;font-weight:600;letter-spacing:.5px;margin:.5rem;overflow:hidden;padding:.875rem 2rem;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.btn:before{background:linear-gradient(90deg,#0000,#ffffff4d,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left .5s;width:100%}.btn:hover:before{left:100%}.btn-primary{background:linear-gradient(135deg,#6b46c1,#ea580c);background:linear-gradient(135deg,var(--primary-purple),var(--primary-orange));box-shadow:0 8px 25px #6b46c14d;box-shadow:0 8px 25px var(--shadow-light);color:#87ceeb;color:var(--sky-blue);text-shadow:0 2px 4px #00000080}.btn-primary:hover{box-shadow:0 12px 35px #6b46c14d;box-shadow:0 12px 35px var(--shadow-light);filter:brightness(1.1);transform:translateY(-3px) scale(1.02)}.btn-secondary{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);box-shadow:0 4px 15px #0003;color:#87ceeb;color:var(--sky-blue);text-shadow:0 2px 4px #00000080}.btn-secondary:hover{background:#fff3;box-shadow:0 8px 25px #ea580c4d;box-shadow:0 8px 25px var(--shadow-orange);transform:translateY(-3px) scale(1.02)}.btn-success{background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 8px 25px #10b9814d;color:#87ceeb;color:var(--sky-blue);text-shadow:0 2px 4px #00000080}.btn-success:hover{box-shadow:0 12px 35px #10b98166;transform:translateY(-3px) scale(1.02)}.btn:disabled{cursor:not-allowed;opacity:.6;transform:none!important}.loading{align-items:center;display:flex;flex-direction:column;gap:1rem;justify-content:center;padding:3rem}.spinner{animation:spin 1s linear infinite;border:4px solid #ffffff1a;border-radius:50%;border-top-color:#6b46c1;border-top:4px solid var(--primary-purple);filter:drop-shadow(0 0 10px rgba(107,70,193,.3));filter:drop-shadow(0 0 10px var(--shadow-light));height:50px;width:50px}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.loading p{color:#87ceeb;color:var(--sky-blue);font-family:Dancing Script,cursive;font-size:1.4rem;font-weight:600;text-shadow:0 2px 4px #00000080}.file-upload{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:2px dashed #6b46c180;border-radius:20px;margin-bottom:2rem;overflow:hidden;padding:3rem;position:relative;text-align:center;transition:all .3s ease}.file-upload:before{animation:rotate 4s linear infinite;background:conic-gradient(from 0deg,#0000,#6b46c1,#0000);background:conic-gradient(from 0deg,#0000,var(--primary-purple),#0000);content:"";height:200%;left:-50%;opacity:0;position:absolute;top:-50%;transition:opacity .3s ease;width:200%}@keyframes rotate{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.file-upload:hover:before{opacity:.1}.file-upload.dragover{background:#ea580c1a;border-color:#ea580c;border-color:var(--primary-orange);box-shadow:0 0 40px #ea580c4d;box-shadow:0 0 40px var(--shadow-orange);transform:scale(1.02)}.file-upload p{color:#fff;color:var(--white);font-size:1.1rem;margin-bottom:1rem}.file-input{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;color:#87ceeb;color:var(--sky-blue);font-family:Dancing Script,cursive;font-size:1.1rem;font-weight:500;margin:1rem 0;max-width:350px;padding:.75rem 1.5rem;transition:all .3s ease;width:100%}.file-input:focus{border-color:#6b46c1;border-color:var(--primary-purple);box-shadow:0 0 20px #6b46c14d;box-shadow:0 0 20px var(--shadow-light);outline:none}.file-list{grid-gap:1.5rem;display:grid;gap:1.5rem;margin-bottom:2rem}.file-item{align-items:center;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;color:#fff;color:var(--white);cursor:pointer;display:flex;justify-content:space-between;overflow:hidden;padding:1.5rem;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.file-item:before{background:linear-gradient(135deg,#6b46c1,#ea580c);background:linear-gradient(135deg,var(--primary-purple),var(--primary-orange));content:"";height:100%;left:0;position:absolute;top:0;transform:scaleY(0);transition:transform .3s ease;width:4px}.file-item:hover:before{transform:scaleY(1)}.file-item:hover{background:#ffffff26;box-shadow:0 8px 30px #6b46c14d;transform:translateX(8px)}.file-item.selected{background:#ea580c26;border-color:#ea580c;border-color:var(--primary-orange);box-shadow:0 8px 30px #ea580c4d;box-shadow:0 8px 30px var(--shadow-orange);transform:translateX(8px)}.file-item.selected:before{background:#ea580c;background:var(--primary-orange);transform:scaleY(1)}.flashcard-container{align-items:center;display:flex;flex-direction:column;gap:2rem}.flashcard{height:350px;max-width:700px;perspective:1000px;width:100%}.flashcard-inner{cursor:pointer;height:100%;position:relative;text-align:center;transform-style:preserve-3d;transition:transform .8s cubic-bezier(.4,0,.2,1);width:100%}.flashcard-inner.flipped{transform:rotateY(180deg)}.flashcard-back,.flashcard-front{align-items:center;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);-webkit-backface-visibility:hidden;backface-visibility:hidden;border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:20px;box-shadow:0 15px 50px #0006,inset 0 1px 0 #fff3;display:flex;font-family:Inter,sans-serif!important;font-size:1.2rem;font-weight:500!important;height:100%;justify-content:center;padding:2.5rem;position:absolute;text-align:center;transition:all .3s ease;width:100%}.flashcard-front{background:linear-gradient(135deg,#6b46c1,#4c1d95);background:linear-gradient(135deg,var(--primary-purple),var(--dark-purple))}.flashcard-back,.flashcard-front{color:#87ceeb!important;color:var(--sky-blue)!important}.flashcard-back{background:linear-gradient(135deg,#ea580c,#c2410c);background:linear-gradient(135deg,var(--primary-orange),var(--dark-orange));transform:rotateY(180deg)}.flashcard:hover .flashcard-back,.flashcard:hover .flashcard-front{box-shadow:0 20px 60px #00000080,0 0 40px #6b46c14d,inset 0 1px 0 #ffffff4d;box-shadow:0 20px 60px #00000080,0 0 40px var(--shadow-light),inset 0 1px 0 #ffffff4d}.flashcard-controls{align-items:center;display:flex;flex-wrap:wrap;gap:1.5rem;justify-content:center}.flashcard-counter{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;color:#87ceeb;color:var(--sky-blue);font-family:Dancing Script,cursive;font-size:1.4rem;font-weight:600;padding:.75rem 1.5rem;text-shadow:0 2px 4px #00000080}.quiz-container{margin:0 auto;max-width:900px}.question-card{animation:slideInLeft .5s ease-out;margin-bottom:2rem}@keyframes slideInLeft{0%{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}.question-title{color:#fff;color:var(--white);font-size:1.3rem;font-weight:600;margin-bottom:1.5rem}.options-list{grid-gap:1rem;display:grid;gap:1rem;list-style:none;padding:0}.option-item{transition:all .3s ease}.option-label{align-items:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;color:#fff;color:var(--white);cursor:pointer;display:flex;overflow:hidden;padding:1rem 1.5rem;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.option-label:before{background:linear-gradient(90deg,#0000,#ffffff1a,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left .5s;width:100%}.option-label:hover:before{left:100%}.option-label:hover{background:#ffffff26;box-shadow:0 8px 25px #6b46c14d;transform:translateX(8px)}.option-label.selected{background:linear-gradient(135deg,#6b46c1,#ea580c);background:linear-gradient(135deg,var(--primary-purple),var(--primary-orange));border-color:#ea580c;border-color:var(--primary-orange);box-shadow:0 8px 25px #ea580c4d;box-shadow:0 8px 25px var(--shadow-orange);transform:translateX(8px)}.option-input{margin-right:1rem;transform:scale(1.2)}.quiz-results{animation:zoomIn .6s ease-out;-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:var(--glass-strong);border:1px solid #ffffff4d;border-radius:24px;margin-top:2rem;padding:3rem;text-align:center}@keyframes zoomIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.score{color:#0f0f23!important;color:var(--black)!important;font-family:Pacifico,cursive!important;font-size:3rem;font-weight:400!important;margin-bottom:1rem;text-shadow:0 0 30px #87ceeb,0 4px 8px #00000080!important;text-shadow:0 0 30px var(--sky-blue),0 4px 8px #00000080!important}.summary-container{margin:0 auto;max-width:1000px}.summary-content{color:#fff;color:var(--white);font-size:1.1rem;line-height:1.8;margin-bottom:2rem}.topics-section{margin-top:2rem}.topic-item{animation:fadeInRight .6s ease-out;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;margin-bottom:2rem;padding:2rem;transition:all .3s ease}@keyframes fadeInRight{0%{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}.topic-item:hover{border-left-color:#fb923c;border-left-color:var(--light-orange);box-shadow:0 12px 40px #ea580c4d;transform:translateY(-4px)}.topic-title{font-family:Kaushan Script,cursive!important;font-size:1.6rem;margin-bottom:1rem;text-shadow:0 0 15px #87ceeb,0 2px 4px #00000080!important;text-shadow:0 0 15px var(--sky-blue),0 2px 4px #00000080!important}.topic-content,.topic-title{color:#87ceeb!important;color:var(--sky-blue)!important;font-weight:400!important}.topic-content{font-family:Inter,sans-serif!important;font-size:1.1rem;line-height:1.7;text-shadow:0 1px 2px #0000004d!important}.auth-page{align-items:center;background:linear-gradient(135deg,#0f0f23,#4c1d95 50%,#c2410c);background:linear-gradient(135deg,var(--black) 0,var(--dark-purple) 50%,var(--dark-orange) 100%);display:flex;justify-content:center;min-height:100vh;padding:2rem;position:relative}.auth-page:before{background:radial-gradient(circle at 20% 80%,#6b46c166 0,#0000 50%),radial-gradient(circle at 80% 20%,#ea580c66 0,#0000 50%);content:"";height:100%;left:0;pointer-events:none;position:absolute;top:0;width:100%}.auth-container{max-width:450px;position:relative;width:100%;z-index:1}.auth-card{animation:slideUp .8s ease-out;-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:var(--glass-strong);border:1px solid #ffffff4d;border-radius:24px;box-shadow:0 20px 60px #00000080,inset 0 1px 0 #ffffff4d;padding:3rem 2.5rem;text-align:center}@keyframes slideUp{0%{opacity:0;transform:translateY(50px)}to{opacity:1;transform:translateY(0)}}.auth-card h2{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Pacifico,cursive!important;font-size:2.2rem;font-weight:400!important;margin-bottom:.5rem;text-shadow:0 0 20px #87ceeb,0 4px 8px #00000080!important;text-shadow:0 0 20px var(--sky-blue),0 4px 8px #00000080!important}.form-group{text-align:left}.form-group label{font-size:1.2rem;text-shadow:0 2px 4px #0000004d!important}.form-input{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:12px;color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Dancing Script,cursive!important;font-size:1.1rem;font-weight:500!important;padding:1rem 1.5rem;transition:all .3s ease;width:100%}.form-input::placeholder{color:#fff9}.form-input:focus{background:#ffffff26;border-color:#6b46c1;border-color:var(--primary-purple);box-shadow:0 0 20px #6b46c14d;box-shadow:0 0 20px var(--shadow-light);outline:none}.auth-btn{font-size:1.1rem;font-weight:600;margin-top:1rem;width:100%}.auth-btn,.error-message{border-radius:12px;padding:1rem}.error-message{color:#fca5a5;margin-bottom:1rem}.auth-switch{border-top:1px solid #fff3;margin-top:2rem;padding-top:2rem}.auth-switch p{color:#fffc}.link-button{background:none;border:none;color:#fb923c;color:var(--light-orange);cursor:pointer;font-size:inherit;font-weight:500;text-decoration:underline;transition:all .3s ease}.link-button:hover{color:#ea580c;color:var(--primary-orange);text-shadow:0 0 10px #ea580c4d;text-shadow:0 0 10px var(--shadow-orange)}.loading-screen{background:linear-gradient(135deg,#0f0f23,#4c1d95 50%,#c2410c);background:linear-gradient(135deg,var(--black) 0,var(--dark-purple) 50%,var(--dark-orange) 100%);justify-content:center;min-height:100vh}.loading-screen,.user-info{align-items:center;display:flex}.user-info{gap:1rem}.user-name{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:10px;color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Dancing Script,cursive!important;font-size:1.2rem;font-weight:600!important;padding:.5rem 1rem;text-shadow:0 2px 4px #0000004d!important}.logout-btn{border-radius:10px;font-size:.9rem;padding:.5rem 1rem}@keyframes pulse{0%{box-shadow:0 0 0 0 #6b46c14d;box-shadow:0 0 0 0 var(--shadow-light)}70%{box-shadow:0 0 0 10px #6b46c100}to{box-shadow:0 0 0 0 #6b46c100}}.btn-primary:hover{animation:pulse 1.5s infinite}@media (max-width:768px){.navbar{flex-direction:column;gap:1rem;padding:1rem}.navbar-nav{flex-wrap:wrap;gap:.5rem;justify-content:center}.main-content{padding:1rem}.flashcard{height:300px;max-width:100%}.flashcard-controls{flex-direction:column;gap:1rem}.auth-page{padding:1rem}.auth-card{padding:2rem 1.5rem}.user-info{flex-direction:column;gap:.5rem}.card,.topic-item{padding:1.5rem}}@media (max-width:480px){.navbar-brand{font-size:1.4rem}.flashcard{height:250px}.flashcard-back,.flashcard-front{padding:1.5rem}.score{font-size:2rem}}.summary-container div:not(.card):not(.topic-item),.summary-container p{font-family:Inter,sans-serif!important;font-size:1.1rem!important;font-weight:400!important;line-height:1.6!important}.flashcard-back div,.flashcard-back p,.flashcard-back span,.flashcard-front div,.flashcard-front p,.flashcard-front span{font-family:Inter,sans-serif!important;font-size:1.2rem!important;font-weight:500!important;line-height:1.5!important}.quiz-container .question-title{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Inter,sans-serif!important;font-size:1.3rem!important;font-weight:600!important}.quiz-container .option-label{font-family:Inter,sans-serif!important;font-size:1.1rem!important;font-weight:400!important}.file-item div,.file-item span,.quiz-container div:not(.card):not(.question-card),.quiz-container p{font-family:Inter,sans-serif!important;font-size:1rem!important;font-weight:400!important}.auth-card h2,.auth-card p,.btn,.flashcard-counter,.form-group label,.form-input,.nav-item,.navbar-brand,.user-name{font-family:Dancing Script,cursive!important}.anime-decoration{animation:float 3s ease-in-out infinite;font-size:2rem;opacity:.3;pointer-events:none;position:absolute}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.card:after{animation:sparkle 2s ease-in-out infinite;content:"✨";font-size:1.5rem;opacity:.4;position:absolute;right:1rem;top:1rem}@keyframes sparkle{0%,to{opacity:.4;transform:scale(1)}50%{opacity:.8;transform:scale(1.2)}}.summary-container .card:after{content:"📖"}.flashcard-container .card:after{content:"💫"}.quiz-container .card:after{content:"🌟"}.file-upload:after{animation:bounce 2s ease-in-out infinite;font-size:1.5rem;opacity:.5;position:absolute;right:1rem;top:1rem}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.loading:before{animation:wave 1.5s ease-in-out infinite;content:"👩‍💻";font-size:2rem;left:50%;position:absolute;top:-2rem;transform:translateX(-50%)}@keyframes wave{0%,to{transform:translateX(-50%) rotate(-10deg)}50%{transform:translateX(-50%) rotate(10deg)}}.btn:hover:after{animation:heartbeat .5s ease-in-out;content:"💖";font-size:1rem;position:absolute;right:-.5rem;top:-1rem}.file-upload .success-message:before{content:"🎉";margin-right:.5rem}.empty-state:before{animation:gentle-bounce 3s ease-in-out infinite;content:"👩‍🎓";display:block;font-size:4rem;margin-bottom:1rem;opacity:.6}@keyframes gentle-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.voice-controls{-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:20px;margin-bottom:2rem;overflow:hidden;padding:2rem;position:relative}.voice-controls:before{animation:shimmer 2s ease-in-out infinite;background:linear-gradient(90deg,#6b46c1,#ea580c);background:linear-gradient(90deg,var(--primary-purple),var(--primary-orange));content:"";height:3px;left:0;position:absolute;right:0;top:0}@keyframes shimmer{0%,to{opacity:.5}50%{opacity:1}}.voice-controls-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:1.5rem}.voice-controls-header h3{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Kaushan 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ease;transition:all .3s ease;width:20px}.voice-slider::-moz-range-thumb:hover{box-shadow:0 6px 20px #6b46c199;transform:scale(1.2)}@media (max-width:768px){.voice-controls{padding:1.5rem}.voice-controls-header{flex-direction:column;gap:1rem;text-align:center}.voice-controls-buttons,.voice-select{align-items:center;flex-direction:column}.voice-btn{max-width:200px;width:100%}.voice-sliders{gap:1rem;grid-template-columns:1fr}.voice-dropdown{max-width:300px;width:100%}}.voice-controls:hover{box-shadow:0 15px 50px #0006,0 0 30px #6b46c14d;box-shadow:0 15px 50px #0006,0 0 30px var(--shadow-light);transform:translateY(-2px)}.voice-loading{display:inline-block;margin-left:.5rem}.voice-loading:after{animation:bounce 1s ease-in-out infinite;content:"🎤"}.voice-controls:after{animation:musical-note 3s ease-in-out infinite;content:"🎵";font-size:1.5rem;opacity:.4;position:absolute;right:1rem;top:1rem}@keyframes musical-note{0%,to{opacity:.4;transform:rotate(-5deg) scale(1)}50%{opacity:.7;transform:rotate(5deg) scale(1.1)}}.progress-header{grid-gap:2rem;align-items:center;-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:24px;display:grid;gap:2rem;grid-template-columns:auto 1fr auto;overflow:hidden;padding:2rem;position:relative}.progress-header:before{animation:rainbow-flow 3s ease-in-out infinite;background:linear-gradient(90deg,#6b46c1,#ea580c,#6b46c1);background:linear-gradient(90deg,var(--primary-purple),var(--primary-orange),var(--primary-purple));content:"";height:4px;left:0;position:absolute;right:0;top:0}@keyframes rainbow-flow{0%,to{opacity:.8}50%{opacity:1}}.level-info{align-items:center;display:flex;flex-direction:column;gap:.5rem}.level-badge{animation:level-glow 2s ease-in-out 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cubic-bezier(.4,0,.2,1)}@keyframes xp-shimmer{0%,to{opacity:.8}50%{opacity:1}}.xp-text{color:#fff!important;color:var(--white)!important;font-family:Inter,sans-serif!important;font-size:.9rem;font-weight:500!important}.motivational-message{text-align:center}.motivational-message h2{font-family:Kaushan Script,cursive!important;font-size:2.2rem;margin-bottom:1rem}.motivation-text,.motivational-message h2{color:#87ceeb!important;color:var(--sky-blue)!important}.motivation-text{animation:motivation-pulse 3s ease-in-out infinite;font-family:Dancing Script,cursive!important;font-size:1.4rem!important;font-weight:600!important;text-shadow:0 2px 4px #0000004d!important}@keyframes motivation-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}.study-streak{align-items:center;display:flex;flex-direction:column}.streak-info{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;padding:1rem 1.5rem;text-align:center}.streak-number{color:#fb923c!important;color:var(--light-orange)!important;display:block;font-family:Pacifico,cursive!important;font-size:2rem;text-shadow:0 0 15px #fb923c;text-shadow:0 0 15px var(--light-orange)}.streak-label{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Dancing Script,cursive!important;font-size:1.1rem!important;font-weight:600!important}.stats-overview{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.stat-card{align-items:center;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:20px;display:flex;gap:1.5rem;overflow:hidden;padding:2rem;position:relative;transition:all .4s cubic-bezier(.4,0,.2,1)}.stat-card:before{background:linear-gradient(135deg,#6b46c1,#ea580c);background:linear-gradient(135deg,var(--primary-purple),var(--primary-orange));content:"";height:100%;left:0;position:absolute;top:0;transform:scaleY(0);transition:transform .3s ease;width:4px}.stat-card:hover:before{transform:scaleY(1)}.stat-card:hover{box-shadow:0 20px 60px #0006,0 0 40px #6b46c14d;box-shadow:0 20px 60px #0006,0 0 40px var(--shadow-light);transform:translateY(-8px) scale(1.02)}.stat-icon{animation:stat-bounce 2s ease-in-out infinite;font-size:3rem}@keyframes stat-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.stat-info h3{font-family:Pacifico,cursive!important;font-size:2.5rem!important;margin:0 0 .5rem!important;text-shadow:0 0 15px #87ceeb;text-shadow:0 0 15px var(--sky-blue)}.stat-info h3,.stat-info p{color:#87ceeb!important;color:var(--sky-blue)!important}.stat-info p{font-family:Dancing 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progress-shimmer{0%,to{opacity:.8}50%{opacity:1}}.progress-fill.uploads{background:linear-gradient(90deg,#6b46c1,#a78bfa);background:linear-gradient(90deg,var(--primary-purple),var(--light-purple))}.progress-fill.summaries{background:linear-gradient(90deg,#ea580c,#fb923c);background:linear-gradient(90deg,var(--primary-orange),var(--light-orange))}.progress-fill.flashcards{background:linear-gradient(90deg,#a78bfa,#6b46c1);background:linear-gradient(90deg,var(--light-purple),var(--primary-purple))}.progress-fill.quizzes{background:linear-gradient(90deg,#87ceeb,#fb923c);background:linear-gradient(90deg,var(--sky-blue),var(--light-orange))}.charts-section{grid-gap:2rem;align-items:start;display:grid;gap:2rem;grid-template-columns:2fr 2fr 1fr}.chart-card{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:24px;height:-webkit-fit-content;height:fit-content;padding:2rem;transition:all .4s cubic-bezier(.4,0,.2,1)}.chart-card:hover{box-shadow:0 15px 50px #0006,0 0 30px #6b46c14d;box-shadow:0 15px 50px #0006,0 0 30px var(--shadow-light);transform:translateY(-4px)}.chart-card h3{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Kaushan Script,cursive!important;font-size:1.6rem;margin-bottom:1.5rem!important;text-align:center}.chart-container{height:300px;position:relative;width:100%}.doughnut-container{align-items:center;display:flex;height:250px;justify-content:center;position:relative;width:100%}.doughnut-container canvas{max-height:200px!important;max-width:200px!important}.score-overlay{left:50%;pointer-events:none;position:absolute;text-align:center;top:50%;transform:translate(-50%,-50%);z-index:10}.score-number{display:block;font-family:Pacifico,cursive!important;font-size:2.5rem!important;text-shadow:0 0 15px #87ceeb;text-shadow:0 0 15px var(--sky-blue)}.score-label,.score-number{color:#87ceeb!important;color:var(--sky-blue)!important}.score-label{font-family:Dancing Script,cursive!important;font-size:1.2rem!important;font-weight:600!important}.achievements-section{-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:24px;padding:2rem}.achievements-section h3{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Kaushan Script,cursive!important;font-size:2rem;margin-bottom:2rem!important;text-align:center}.achievements-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.achievement-item{align-items:center;animation:achievement-glow 3s ease-in-out infinite;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;display:flex;gap:1rem;padding:1.5rem;transition:all .3s ease}@keyframes achievement-glow{0%,to{box-shadow:0 4px 15px #6b46c133}50%{box-shadow:0 8px 25px #6b46c166}}.achievement-item:hover{box-shadow:0 12px 35px #6b46c14d;box-shadow:0 12px 35px var(--shadow-light);transform:translateY(-4px) scale(1.02)}.achievement-item .achievement-icon{animation:achievement-bounce 2s ease-in-out infinite;font-size:2.5rem}@keyframes achievement-bounce{0%,to{transform:scale(1) rotate(0deg)}50%{transform:scale(1.1) rotate(5deg)}}.achievement-details h4{font-family:Dancing Script,cursive!important;font-size:1.3rem!important;font-weight:600!important}.achievement-details h4,.achievement-details p{color:#87ceeb!important;color:var(--sky-blue)!important;margin:0 0 .5rem!important}.achievement-details p{font-family:Inter,sans-serif!important;font-size:1rem!important;opacity:.9}.achievement-date{color:#4682b4!important;color:var(--dark-sky-blue)!important;font-family:Inter,sans-serif!important;font-size:.8rem!important;opacity:.7}.achievement-notification{-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;box-shadow:0 15px 50px #0006;max-width:350px;opacity:0;padding:1.5rem;position:fixed;right:2rem;top:2rem;transform:translateX(400px);transition:all .3s cubic-bezier(.4,0,.2,1);z-index:1000}.achievement-notification.show{opacity:1;transform:translateX(0)}.achievement-content{align-items:center;display:flex;gap:1rem}.achievement-notification .achievement-icon{animation:celebration 1s ease-in-out infinite;font-size:2rem}@keyframes celebration{0%,to{transform:scale(1) rotate(0deg)}25%{transform:scale(1.1) rotate(-5deg)}75%{transform:scale(1.1) rotate(5deg)}}.achievement-text h4{font-family:Dancing Script,cursive!important;font-size:1.2rem!important;font-weight:600!important;margin:0 0 .5rem!important}.achievement-text h4,.achievement-text p{color:#87ceeb!important;color:var(--sky-blue)!important}.achievement-text p{font-family:Inter,sans-serif!important;font-size:.9rem!important;margin:0!important}@media (max-width:768px){.progress-analytics{padding:1rem}.progress-header{gap:1.5rem;text-align:center}.charts-section,.progress-header,.stats-overview{grid-template-columns:1fr}.doughnut-container canvas{max-height:180px!important;max-width:180px!important}.achievements-grid{grid-template-columns:1fr}.achievement-notification{left:1rem;max-width:none;right:1rem;top:1rem}.chart-container{height:250px}.doughnut-container{height:200px!important}.doughnut-container canvas{max-height:150px!important;max-width:150px!important}}@media (max-width:480px){.stat-card{gap:1rem}.achievement-item,.stat-card{flex-direction:column;text-align:center}.level-badge{padding:.75rem 1rem}.level-number{font-size:1.2rem}}.score-chart{justify-self:center;max-width:300px}.score-chart .chart-container{align-items:center;display:flex;height:250px;justify-content:center}.score-chart .doughnut-container{height:200px;position:relative;width:200px}.score-chart .doughnut-container canvas{height:200px!important;max-height:200px!important;max-width:200px!important;width:200px!important}.progress-analytics{display:flex;flex-direction:column;gap:2rem;height:auto;margin:0 auto;max-width:1400px;min-height:-webkit-fit-content;min-height:fit-content;overflow:visible;padding:2rem}.progress-analytics *{box-sizing:border-box}.chart-card{max-height:450px}.chart-card,.chart-container{overflow:hidden}@media (max-width:768px){.score-chart{max-width:100%}.score-chart .doughnut-container{height:180px;width:180px}.score-chart .doughnut-container canvas{height:180px!important;max-height:180px!important;max-width:180px!important;width:180px!important}}@media (max-width:480px){.score-chart .doughnut-container{height:150px;width:150px}.score-chart .doughnut-container canvas{height:150px!important;max-height:150px!important;max-width:150px!important;width:150px!important}.score-number{font-size:2rem!important}.score-label{font-size:1rem!important}}.community-stats{align-items:center;display:flex;gap:2rem}.stat-item{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:16px;padding:1rem 1.5rem;text-align:center;transition:all .3s ease}.stat-item:hover{box-shadow:0 8px 25px #6b46c14d;box-shadow:0 8px 25px var(--shadow-light);transform:translateY(-4px) scale(1.05)}.stat-number{display:block;font-family:Pacifico,cursive!important;font-size:1.8rem!important;text-shadow:0 0 10px #87ceeb;text-shadow:0 0 10px 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infinite;background:linear-gradient(90deg,#6b46c1,#ea580c,#a78bfa);background:linear-gradient(90deg,var(--primary-purple),var(--primary-orange),var(--light-purple));content:"";height:4px;left:0;position:absolute;right:0;top:0}@keyframes community-flow{0%,to{opacity:.8}50%{opacity:1}}.header-content h2{font-family:Kaushan Script,cursive!important;font-size:2.2rem;margin-bottom:.5rem!important;text-shadow:0 0 15px #87ceeb;text-shadow:0 0 15px var(--sky-blue)}.header-content h2,.header-content p{color:#87ceeb!important;color:var(--sky-blue)!important}.header-content p{font-family:Dancing Script,cursive!important;font-size:1.3rem!important;font-weight:600!important;opacity:.9}.library-controls{align-items:center;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid 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ease-out;-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);background:#ffffff26;background:var(--glass-bg-strong);border:1px solid #fff3;border:1px solid var(--glass-border);border-radius:24px;padding:2.5rem}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.upload-form h3{color:#87ceeb!important;color:var(--sky-blue)!important;font-family:Kaushan Script,cursive!important;font-size:1.8rem;margin-bottom:2rem!important;text-align:center}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-family:Dancing Script,cursive!important;font-size:1.2rem!important;font-weight:600!important;margin-bottom:.5rem}.form-group label,.form-input,.form-textarea{color:#87ceeb!important;color:var(--sky-blue)!important}.form-input,.form-textarea{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;background:var(--glass-bg);border:1px solid #fff3;border:1px solid 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