.hero-section{min-height:700px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;padding:4rem 1rem}.hero-content{text-align:center;color:#fff;max-width:1400px;margin:0 auto;width:100%;position:relative;z-index:10}.topics-container{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin:0 auto;max-width:1200px;perspective:1000px;align-items:stretch}.topic-card{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 10px 30px rgba(0,0,0,.15);height:100%;min-height:400px;display:flex;flex-direction:column;position:relative;overflow:hidden;opacity:0;transform:translateY(30px) scale(.95);animation:cardFadeIn .6s ease forwards;transition:all .3s ease;color:#fff}@media (min-width:1800px){.topics-container{max-width:1400px;gap:2.5rem}.topic-card{min-height:450px;padding:2.5rem}.topic-title{font-size:1.6rem}.topic-description{font-size:1.1rem;min-height:70px}.topic-includes{font-size:.9rem}}@media (min-width:1400px) and (max-width:1799px){.topics-container{max-width:1200px;gap:2rem}.topic-card{min-height:400px;padding:2rem}.topic-title{font-size:1.5rem}.topic-description{font-size:1rem;min-height:60px}.topic-includes{font-size:.875rem}}.topic-card:hover{transform:translateY(-5px);box-shadow:0 15px 40px rgba(0,0,0,.25)}.card-cyan{background:linear-gradient(135deg,#17a2b8,#138496)}.card-green{background:linear-gradient(135deg,#28a745,#218838)}.card-red{background:linear-gradient(135deg,#dc3545,#c82333)}.card-orange{background:linear-gradient(135deg,#fd7e14,#e8590c)}.card-purple{background:linear-gradient(135deg,#6f42c1,#5a32a3)}.card-blue{background:linear-gradient(135deg,#007bff,#0056b3)}.card-teal{background:linear-gradient(135deg,#20c997,#1aa179)}.card-indigo{background:linear-gradient(135deg,#6610f2,#520dc2)}.card-pink{background:linear-gradient(135deg,#e83e8c,#d91a72)}.card-yellow{background:linear-gradient(135deg,#ffc107,#e0a800)}.card-gray{background:linear-gradient(135deg,#6c757d,#545b62)}.card-accent{display:none}.topic-header{margin-bottom:1.5rem;min-height:80px}.topic-header,.topic-icon{display:flex;align-items:center}.topic-icon{width:50px;height:50px;min-width:50px;background:hsla(0,0%,100%,.2);border-radius:12px;margin-right:1rem;justify-content:center;box-shadow:0 4px 10px rgba(0,0,0,.2);backdrop-filter:blur(10px);border:2px solid hsla(0,0%,100%,.3)}.topic-icon,.topic-title{font-size:1.5rem;color:#fff}.topic-title{font-weight:700;line-height:1.3;margin:0;flex:1}.topic-description{color:hsla(0,0%,100%,.95);font-size:1rem;line-height:1.6;margin-bottom:1.5rem;min-height:60px}.topic-includes{color:hsla(0,0%,100%,.85);font-size:.875rem;line-height:1.5;border-top:1px solid hsla(0,0%,100%,.3);padding-top:1rem;margin-top:auto}.controls{gap:1rem;margin-top:3rem;flex-wrap:wrap}.control-btn,.controls{display:flex;justify-content:center}.control-btn{background:#fff;border:2px solid #dee2e6;color:#495057;padding:.75rem 1.5rem;border-radius:30px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 8px rgba(0,0,0,.1);white-space:nowrap;align-items:center;gap:.5rem}.control-btn:hover{background:#17a2b8;color:#fff;border-color:#17a2b8;transform:translateY(-2px);box-shadow:0 5px 15px rgba(23,162,184,.3)}.control-btn:disabled{opacity:.5;cursor:not-allowed}.progress-container{display:flex;justify-content:center;gap:.75rem;margin-top:2.5rem;flex-wrap:wrap}.progress-bar{width:60px;height:4px;background:hsla(208,7%,46%,.3);border-radius:2px;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.progress-bar.active{background:hsla(208,7%,46%,.5)}.progress-fill{position:absolute;top:0;left:0;height:100%;width:0;background:#17a2b8;transition:width 5s linear}.progress-bar.active .progress-fill{width:100%}@keyframes cardFadeIn{to{opacity:1;transform:translateY(0) scale(1)}}.bg-pattern{position:absolute;top:0;left:0;right:0;bottom:0;opacity:.05;background-image:repeating-linear-gradient(45deg,transparent,transparent 35px,hsla(0,0%,100%,.1) 0,hsla(0,0%,100%,.1) 70px)}.loading{display:flex;justify-content:center;align-items:center;min-height:320px;grid-column:1/-1}.loading-spinner{border:3px solid hsla(0,0%,100%,.3);border-top-color:#fff;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (min-width:1000px) and (max-width:1399px){.hero-section{min-height:300px;padding:1rem}.topics-container{grid-template-columns:repeat(3,1fr);max-width:650px;gap:.5rem}.topic-card{min-height:140px;padding:.5rem}.topic-title{font-size:.85rem;margin-bottom:.4rem}.topic-description{font-size:.7rem;min-height:25px;line-height:1.2}.topic-includes{font-size:.65rem;line-height:1.1}}@media (max-width:999px){.hero-section{min-height:600px;padding:3rem 1rem}.topics-container{grid-template-columns:repeat(2,1fr);max-width:700px;gap:1.5rem}.topic-card{min-height:350px}.topic-card:nth-child(3){grid-column:1/-1;max-width:350px;margin:0 auto;width:100%}.topic-title{font-size:1.25rem}.topic-description{font-size:.95rem}.controls{gap:.75rem}.control-btn{padding:.65rem 1.25rem;font-size:.95rem}}@media (max-width:768px){.hero-section{min-height:auto;padding:2rem .75rem}.topics-container{grid-template-columns:1fr;gap:1.25rem;max-width:100%;padding:0 .5rem}.topic-card{min-height:auto;padding:1.5rem}.topic-card:nth-child(3){max-width:100%}.topic-header{min-height:auto;margin-bottom:1rem}.topic-icon{width:40px;height:40px;min-width:40px;font-size:1.25rem}.topic-title{font-size:1.15rem}.topic-description{font-size:.9rem;min-height:auto;margin-bottom:1rem}.topic-includes{font-size:.8rem}.controls{flex-wrap:wrap;gap:.5rem;margin-top:2rem;padding:0 1rem;justify-content:center}.control-btn{flex:0 0 auto;min-width:120px;max-width:140px;padding:.6rem .8rem;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-container{margin-top:1.5rem;gap:.5rem}.progress-bar{width:40px}}@media (max-width:480px){.hero-section{padding:1.5rem .5rem}.topic-card{padding:1.25rem}.topic-title{font-size:1rem}.topic-description{font-size:.85rem}.topic-includes{font-size:.75rem}.controls{gap:.4rem;padding:0 .5rem}.control-btn{font-size:.8rem;padding:.5rem .7rem;min-width:100px;max-width:120px}.progress-bar{width:30px;height:3px}}@keyframes glow-pulse{0%,to{box-shadow:0 0 10px rgba(59,130,246,.4),0 0 20px rgba(59,130,246,.3),0 0 30px rgba(59,130,246,.2)}50%{box-shadow:0 0 15px rgba(59,130,246,.6),0 0 30px rgba(59,130,246,.4),0 0 45px rgba(59,130,246,.3)}}.chat-glow-btn{animation:glow-pulse 2s ease-in-out infinite}.chat-glow-btn:hover{animation:glow-pulse 1s ease-in-out infinite}