@media (max-width:768px){.landing{padding:2.5rem 1.5rem}.landing-title{font-size:1.8rem}.landing-description{font-size:1rem}.book-recommendation,.quiz-container{padding:1.8rem 1.2rem;margin-top:1rem}.quiz-title{font-size:1.6rem;margin-bottom:1.5rem}.question-title{font-size:1.2rem}.option-btn{padding:10px 16px;font-size:.9rem}.book-image-container{width:180px;height:270px}.book-title{font-size:1.6rem}.book-author{font-size:1rem}.book-description{font-size:.9rem;padding:1rem}.btn{padding:14px 24px;font-size:1rem}.navigation-buttons{gap:12px}.navigation-main-btn,.navigation-secondary-btn{width:100%}}@media (max-width:480px){.container{padding:0 15px}.landing{padding:2rem 1.2rem}.landing-title{font-size:1.5rem;margin-bottom:1.5rem}.book-recommendation,.quiz-container{padding:1.5rem 1rem;border-radius:16px}.question-section{padding:1.2rem;margin:1.5rem 0}.options-container{gap:8px}.option-btn{padding:8px 14px;font-size:.85rem}.book-image-container{width:150px;height:225px;margin-bottom:1.5rem}.book-title{font-size:1.4rem}.book-author{font-size:.9rem;margin-bottom:1rem}.book-description{font-size:.85rem;padding:.8rem;line-height:1.5}.action-buttons{flex-direction:column;width:100%;gap:10px}.action-buttons .btn{width:100%;padding:12px 20px}}:root{--primary-color:#5d4ef2;--secondary-color:#8a7aff;--accent-color:#ff8551;--background-color:#f8f9fe;--text-color:#2d3748;--white:#fff;--shadow:0 10px 30px rgba(93,78,242,.15);--card-shadow:0 15px 35px rgba(50,50,93,.1),0 5px 15px rgba(0,0,0,.07);--gradient-start:#5d4ef2;--gradient-end:#7b6af9;--gradient-accent:#ff8551;--dark-purple:#3e3a7d;--light-purple:#e5e1ff}*{box-sizing:border-box;margin:0;padding:0}body,html{font-family:Poppins,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--background-color);color:var(--text-color);height:100%;background-image:radial-gradient(circle at 10% 20%,rgba(93,78,242,.05) 0,transparent 20%),radial-gradient(circle at 90% 80%,rgba(255,133,81,.07) 0,transparent 20%),radial-gradient(circle at 50% 50%,rgba(93,78,242,.03) 0,transparent 100%);background-attachment:fixed}.container{max-width:1200px;margin:0 auto;padding:20px;min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;position:relative;z-index:1}.landing{position:relative;padding:4rem 2rem;border-radius:24px;background:hsla(0,0%,100%,.7);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--card-shadow);max-width:900px;animation:floatIn 1s ease-out;overflow:hidden}.landing:before{top:-50px;left:-50px;width:200px;height:200px;background:linear-gradient(135deg,var(--accent-color) 0,rgba(255,133,81,.2) 100%)}.landing:after,.landing:before{content:"";position:absolute;border-radius:50%;opacity:.2;z-index:-1}.landing:after{bottom:-100px;right:-100px;width:300px;height:300px;background:linear-gradient(135deg,var(--primary-color) 0,rgba(93,78,242,.2) 100%)}.landing-title{font-size:2.8rem;margin-bottom:3rem;line-height:1.4;max-width:800px;font-weight:700}.gradient-text{background:linear-gradient(to right,var(--dark-purple),var(--primary-color));-webkit-background-clip:text;background-clip:text;color:transparent}.landing-description{color:var(--text-color);font-size:1.2rem;margin-bottom:1.5rem;line-height:1.6;opacity:.9}.btn{padding:16px 32px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:var(--white);border:none;border-radius:50px;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 10px 20px rgba(93,78,242,.3);position:relative;overflow:hidden;letter-spacing:.5px}.btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.2),transparent);transition:all .6s ease}.btn:hover{transform:translateY(-5px);box-shadow:0 15px 25px rgba(93,78,242,.4)}.btn:hover:before{left:100%}.btn-accent{background:linear-gradient(135deg,var(--accent-color),#ff9b6a);box-shadow:0 10px 20px rgba(255,133,81,.3)}.btn-accent:hover{box-shadow:0 15px 25px rgba(255,133,81,.4)}@keyframes floatIn{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.quiz-container{background:hsla(0,0%,100%,.85);padding:2.5rem;border-radius:20px;box-shadow:var(--card-shadow);width:100%;max-width:850px;margin-top:2rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative;overflow:hidden;border:1px solid hsla(0,0%,100%,.8);animation:fadeSlideUp .6s ease-out}.quiz-container:before{content:"";position:absolute;top:-10%;right:-10%;width:200px;height:200px;background:radial-gradient(circle,var(--light-purple) 0,transparent 70%);opacity:.5;z-index:-1;border-radius:50%}.quiz-title{font-size:2.2rem;margin-bottom:2rem;color:var(--dark-purple);font-weight:700;text-align:center;background:linear-gradient(to right,var(--dark-purple),var(--primary-color));-webkit-background-clip:text;background-clip:text;color:transparent}.options-container{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:1.8rem 0}.option-btn{padding:12px 20px;background-color:hsla(0,0%,100%,.7);color:var(--text-color);border:2px solid var(--light-purple);border-radius:50px;font-size:1.05rem;cursor:pointer;transition:all .2s ease;box-shadow:0 3px 10px rgba(93,78,242,.1);position:relative;overflow:hidden;font-weight:500}.option-btn:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(93,78,242,.15);border-color:var(--secondary-color)}.option-btn.selected{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:var(--white);border-color:transparent;transform:translateY(-2px);box-shadow:0 5px 15px rgba(93,78,242,.3)}.question-section{margin:2.5rem 0;background:hsla(0,0%,100%,.5);padding:1.8rem;border-radius:16px;border:1px solid hsla(0,0%,100%,.8);box-shadow:0 5px 15px rgba(0,0,0,.05);animation:fadeIn .6s ease-out}.question-title{font-size:1.4rem;margin-bottom:1.5rem;font-weight:600;color:var(--dark-purple);letter-spacing:.3px}@keyframes fadeSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.book-recommendation{display:flex;flex-direction:column;align-items:center;text-align:center;padding:3rem 2rem;background:hsla(0,0%,100%,.85);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:24px;box-shadow:var(--card-shadow);max-width:850px;margin:0 auto;position:relative;overflow:hidden;border:1px solid hsla(0,0%,100%,.8);animation:fadeZoomIn .8s ease-out}.book-recommendation:before{top:-100px;left:-100px;background:radial-gradient(circle,rgba(93,78,242,.1) 0,transparent 70%)}.book-recommendation:after,.book-recommendation:before{content:"";position:absolute;width:300px;height:300px;z-index:-1;border-radius:50%}.book-recommendation:after{bottom:-100px;right:-100px;background:radial-gradient(circle,rgba(255,133,81,.1) 0,transparent 70%)}.book-image-container{width:280px;height:400px;margin-bottom:2.5rem;border-radius:12px;box-shadow:0 20px 40px rgba(0,0,0,.2);display:flex;justify-content:center;align-items:center;overflow:hidden;background-color:#f8f9fa;position:relative;transform:perspective(1000px) rotateY(5deg);transition:all .5s ease}.book-image-container:after{content:"";position:absolute;top:0;right:0;bottom:0;width:20px;background:linear-gradient(90deg,transparent,rgba(0,0,0,.1));transform:skewY(-45deg) translateX(20px);transform-origin:top right}.book-image-container:hover{transform:perspective(1000px) rotateY(0deg);box-shadow:0 25px 50px rgba(0,0,0,.25)}.book-image{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}.book-image:hover{transform:scale(1.05)}.book-title{font-size:2.4rem;margin-bottom:.8rem;color:var(--dark-purple);font-weight:700;background:linear-gradient(to right,var(--dark-purple),var(--primary-color));-webkit-background-clip:text;background-clip:text;color:transparent}.book-author{font-size:1.3rem;margin-bottom:2rem;color:var(--text-color);opacity:.8;font-weight:500;font-style:italic}.book-description{max-width:700px;line-height:1.8;margin-bottom:2.5rem;font-size:1.1rem;color:var(--text-color);background:hsla(0,0%,100%,.6);padding:1.5rem;border-radius:16px;border:1px solid hsla(0,0%,100%,.8)}@keyframes fadeZoomIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.navigation-buttons{display:flex;flex-direction:column;width:100%;margin-top:2.5rem;gap:15px;padding:0 1rem}.navigation-main-btn{order:1;font-size:1.1rem;padding:14px 28px}.navigation-secondary-btn{order:2;background:hsla(0,0%,100%,.5);color:var(--text-color);border:1px solid var(--light-purple)}.navigation-secondary-btn:hover{background:hsla(0,0%,100%,.8);transform:translateY(-2px)}.hidden{display:none}.fade-in{animation:fadeIn .5s ease-in}.book-decoration{position:absolute;width:40px;height:40px;background-color:var(--light-purple);opacity:.3;border-radius:8px;z-index:-1;animation:float 6s ease-in-out infinite}.book-decoration:first-child{top:10%;left:5%;animation-delay:0s;transform:rotate(15deg)}.book-decoration:nth-child(2){top:20%;right:10%;animation-delay:1s;transform:rotate(-10deg);width:25px;height:25px}.book-decoration:nth-child(3){bottom:15%;left:10%;animation-delay:2s;transform:rotate(30deg);width:30px;height:30px}.book-decoration:nth-child(4){bottom:20%;right:5%;animation-delay:3s;transform:rotate(-20deg);width:20px;height:20px}@keyframes float{0%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(-20px) rotate(10deg)}to{transform:translateY(0) rotate(0deg)}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:hsla(0,0%,100%,.5);border-radius:10px}::-webkit-scrollbar-thumb{background:linear-gradient(var(--primary-color),var(--secondary-color));border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--dark-purple)}.action-buttons{gap:15px;margin-top:2rem}.twitter-popup-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .3s ease-out}.twitter-popup{background:#fff;width:90%;max-width:350px;border-radius:16px;box-shadow:0 20px 40px rgba(0,0,0,.3);position:relative;overflow:hidden;animation:popIn .4s cubic-bezier(.175,.885,.32,1.275)}.twitter-popup-close{position:absolute;top:12px;right:12px;width:30px;height:30px;background:rgba(0,0,0,.05);border:none;border-radius:50%;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#536471;transition:background .2s}.twitter-popup-close:hover{background:rgba(0,0,0,.1)}.twitter-popup-content{padding:24px;text-align:center}.twitter-logo{margin-bottom:16px;display:flex;justify-content:center}.twitter-popup h3{font-size:1.4rem;margin-bottom:10px;color:#0f1419}.twitter-popup p{color:#536471;margin-bottom:20px;font-size:.95rem}.twitter-popup-actions{display:flex;flex-direction:column;gap:10px}.twitter-follow-btn{background:#1d9bf0;color:#fff;border:none;border-radius:50px;padding:12px 16px;font-weight:600;cursor:pointer;transition:background .2s}.twitter-follow-btn:hover{background:#1a8cd8}.twitter-later-btn{background:transparent;color:#1d9bf0;border:1px solid #cfd9de;border-radius:50px;padding:12px 16px;font-weight:600;cursor:pointer;transition:background .2s}.twitter-later-btn:hover{background:rgba(29,155,240,.1)}@keyframes popIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}@media (max-width:480px){.twitter-popup{width:90%;max-width:300px}.twitter-popup h3{font-size:1.2rem}.twitter-popup p{font-size:.9rem}.twitter-popup-actions{gap:8px}.twitter-follow-btn,.twitter-later-btn{padding:10px 14px;font-size:.9rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.loading-animation{display:flex;flex-direction:column;align-items:center;justify-content:center;margin:2rem 0}.book{position:relative;width:100px;height:60px;perspective:500px;margin-bottom:20px}.book__page{position:absolute;width:100%;height:100%;top:0;left:0;background-color:var(--primary-color);border-radius:5px;transform-origin:0 50%;animation:flip 1.5s linear infinite;animation-delay:calc(.25s * var(--i, 0));z-index:calc(3 - var(--i, 0))}.book__page:first-child{--i:0;background-color:var(--secondary-color)}.book__page:nth-child(2){--i:1;background-color:var(--accent-color)}.book__page:nth-child(3){--i:2;background-color:var(--primary-color)}@keyframes flip{0%,10%{transform:rotateY(0deg)}40%,60%{transform:rotateY(-180deg)}90%,to{transform:rotateY(0deg)}}.action-buttons{display:flex;gap:10px;margin-top:1.5rem}