.navigation{position:fixed;top:0;left:0;right:0;z-index:100;background:#0f172acc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.1);box-shadow:0 4px 30px #0000004d}.nav-container{max-width:1400px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.nav-brand{display:flex;align-items:center;gap:.75rem;font-size:1.5rem;font-weight:700;color:#fff}.brand-icon{font-size:2rem;filter:drop-shadow(0 0 10px rgba(99,102,241,.5))}.brand-text{background:linear-gradient(135deg,var(--primary-color),var(--accent-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:1rem}.nav-link{position:relative;display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:12px;text-decoration:none;color:#ffffffb3;font-size:1rem;font-weight:600;transition:all .3s ease;overflow:hidden}.nav-link:hover{color:#fff;background:#ffffff1a;transform:translateY(-2px)}.nav-link.active{color:#fff;background:#6366f133}.nav-icon{font-size:1.2rem}.nav-label{position:relative;z-index:1}.nav-indicator{position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(135deg,var(--primary-color),var(--accent-color));border-radius:3px 3px 0 0}:root{--nav-height: 80px}@media (max-width: 768px){.nav-container{padding:.75rem 1rem}.brand-text{display:none}.nav-links{gap:.5rem}.nav-link{padding:.6rem 1rem;font-size:.9rem}.nav-label{display:none}.nav-icon{font-size:1.5rem}}@media (max-width: 480px){.brand-icon{font-size:1.5rem}.nav-link{padding:.5rem .75rem}}.message{display:flex;gap:16px;animation:slideIn .3s ease-out}@keyframes 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(max-width: 768px){.message{gap:12px}.message-avatar{width:36px;height:36px;font-size:18px}.message-text{padding:12px 16px;font-size:14px}}.chat-input-container{padding:24px 32px;border-top:1px solid var(--border-color);background:#1e293b99;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.chat-input-form{display:flex;gap:12px;align-items:flex-end}.chat-input{flex:1;min-height:56px;max-height:200px;padding:16px 20px;background:#0f172acc;border:2px solid var(--border-color);border-radius:16px;color:var(--text-primary);font-size:15px;font-family:inherit;resize:none;outline:none;transition:all .3s ease;overflow-y:auto}.chat-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px 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spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.input-hint{margin-top:8px;text-align:center;font-size:12px;color:var(--text-secondary);opacity:.7}@media (max-width: 768px){.chat-input-container{padding:16px 20px}.chat-input{min-height:48px;padding:12px 16px;font-size:14px}.send-btn{width:48px;height:48px;font-size:20px}}.chat-page{width:100%;min-height:100vh;display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden;padding-top:80px}.chat-container{width:90%;max-width:1200px;height:90vh;background:#0f172acc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-color);border-radius:24px;box-shadow:var(--shadow-xl);display:flex;flex-direction:column;position:relative;z-index:1;overflow:hidden}.chat-header{padding:24px 32px;border-bottom:1px solid var(--border-color);background:#1e293b99;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-content{display:flex;justify-content:space-between;align-items:center}.title{font-size:28px;font-weight:700;display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,var(--primary-color),var(--accent-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo{font-size:32px;filter:drop-shadow(0 0 10px rgba(99,102,241,.5))}.clear-btn{padding:10px 20px;background:#ef44441a;border:1px solid var(--error-color);border-radius:12px;color:var(--error-color);font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease}.clear-btn:hover{background:#ef444433;transform:translateY(-2px);box-shadow:0 4px 12px #ef44444d}.messages-container{flex:1;overflow-y:auto;padding:24px 32px;display:flex;flex-direction:column;gap:16px}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;gap:24px}.welcome-icon{font-size:80px;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}.welcome-screen h2{font-size:32px;font-weight:700;background:linear-gradient(135deg,var(--primary-color),var(--accent-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome-screen p{font-size:18px;color:var(--text-secondary)}.suggestions{display:flex;flex-direction:column;gap:12px;margin-top:20px}.suggestions button{padding:14px 24px;background:#6366f11a;border:1px solid var(--primary-color);border-radius:12px;color:var(--text-primary);font-size:14px;cursor:pointer;transition:all .3s ease;text-align:left}.suggestions button:hover{background:#6366f133;transform:translate(8px);box-shadow:0 4px 12px #6366f14d}.loading-indicator{display:flex;align-items:center;gap:12px;padding:16px 20px;background:#6366f11a;border:1px solid var(--primary-color);border-radius:16px;align-self:flex-start;margin-left:48px}.typing-dots{display:flex;gap:6px}.typing-dots span{width:8px;height:8px;background:var(--primary-color);border-radius:50%;animation:typing 1.4s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.6}30%{transform:translateY(-10px);opacity:1}}.loading-text{color:var(--text-secondary);font-size:14px}@media (max-width: 768px){.chat-container{width:100%;height:100vh;border-radius:0}.chat-header{padding:16px 20px}.title{font-size:22px}.messages-container{padding:16px 20px}.welcome-screen h2{font-size:24px}.suggestions{width:100%}}.media-gallery{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);position:relative;overflow:hidden;padding:2rem;padding-top:calc(80px + 2rem)}.gallery-container{max-width:1400px;margin:0 auto;position:relative;z-index:1}.gallery-header{text-align:center;margin-bottom:3rem;color:#fff}.gallery-title{font-size:3rem;font-weight:700;margin-bottom:.5rem;display:flex;align-items:center;justify-content:center;gap:1rem}.gallery-title .icon{font-size:3.5rem}.gallery-subtitle{font-size:1.2rem;opacity:.9;font-weight:300}.gallery-controls{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;padding:1.5rem;margin-bottom:2rem;border:1px solid rgba(255,255,255,.2)}.search-box{position:relative;margin-bottom:1.5rem}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);font-size:1.2rem}.search-input{width:100%;padding:1rem 1rem 1rem 3rem;border-radius:12px;border:2px solid 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#0000004d}.media-preview{position:relative;width:100%;height:200px;overflow:hidden;background:linear-gradient(135deg,#f5f7fa,#c3cfe2)}.video-preview,.image-preview{width:100%;height:100%;display:flex;align-items:center;justify-content:center}.video-preview img,.image-preview img{width:100%;height:100%;object-fit:cover}.video-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.play-icon{font-size:4rem;opacity:.8}.media-type-badge{position:absolute;top:.75rem;right:.75rem;padding:.4rem .8rem;border-radius:8px;font-size:.85rem;font-weight:600;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.media-type-badge.video{background:#ff3b30e6;color:#fff}.media-type-badge.image{background:#34c759e6;color:#fff}.media-info{padding:1.5rem}.media-title{font-size:1.2rem;font-weight:700;color:#2d3748;margin-bottom:.5rem;line-height:1.4}.media-description{font-size:.95rem;color:#718096;margin-bottom:1rem;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.media-actions{display:flex;gap:.5rem}.action-btn{padding:.6rem 1rem;border-radius:8px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;text-decoration:none;font-size:.9rem;font-weight:600;transition:all .3s ease;display:inline-flex;align-items:center;gap:.3rem}.action-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.empty-state{text-align:center;padding:4rem 2rem;color:#fff}.empty-icon{font-size:5rem;margin-bottom:1rem}.empty-state h3{font-size:2rem;margin-bottom:1rem}.empty-state p{font-size:1.1rem;opacity:.9;margin-bottom:.5rem}.empty-state code{background:#fff3;padding:.3rem .6rem;border-radius:6px;font-family:Courier New,monospace}.media-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:1000;padding:2rem}.modal-content{background:#fff;border-radius:20px;max-width:900px;width:100%;max-height:90vh;overflow-y:auto;position:relative}.modal-close{position:absolute;top:1rem;right:1rem;width:40px;height:40px;border-radius:50%;background:#0009;color:#fff;border:none;font-size:1.5rem;cursor:pointer;z-index:10;transition:all .3s ease}.modal-close:hover{background:#000c;transform:rotate(90deg)}.modal-media{width:100%;background:#000;border-radius:20px 20px 0 0;overflow:hidden}.modal-video,.modal-image{width:100%;display:block}.modal-video{max-height:60vh}.modal-image{max-height:70vh;object-fit:contain}.modal-info{padding:2rem}.modal-info h2{font-size:1.8rem;color:#2d3748;margin-bottom:1rem}.modal-info p{font-size:1.1rem;color:#718096;line-height:1.6;margin-bottom:1.5rem}.modal-link{padding:1rem;background:#f7fafc;border-radius:12px;word-break:break-all}.modal-link strong{display:block;margin-bottom:.5rem;color:#2d3748}.modal-link a{color:#667eea;text-decoration:none;font-family:Courier New,monospace;font-size:.95rem}.modal-link a:hover{text-decoration:underline}@media (max-width: 768px){.media-gallery{padding:1rem}.gallery-title{font-size:2rem}.gallery-title .icon{font-size:2.5rem}.media-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.tabs{flex-direction:column}.tab{min-width:auto}.modal-content{margin:1rem;max-height:95vh}.modal-info{padding:1.5rem}}.homework-container{max-height:100vh;overflow-y:auto;padding:20px;max-width:900px;margin:0 auto}.homework-container h1{text-align:center;margin-bottom:30px;color:#333}.homework-item{background:#fff;border-radius:8px;padding:20px;margin-bottom:30px;box-shadow:0 2px 8px #0000001a}.homework-item h2{margin-top:0;margin-bottom:15px;color:#2c3e50}.homework-link,.homework-video{margin:15px 0}.homework-link a,.homework-video a{display:inline-block;padding:8px 16px;color:#000;border-radius:4px;transition:background .3s;cursor:pointer}.homework-link a:hover,.homework-video a:hover{background:#2980b9}.homework-image{margin:20px 0}.homework-image img{width:100%;height:auto;border-radius:4px;display:block}.homework-container::-webkit-scrollbar{width:8px}.homework-container::-webkit-scrollbar-track{background:#f1f1f1}.homework-container::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.homework-container::-webkit-scrollbar-thumb:hover{background:#555}h3{color:#000}.app{width:100%;min-height:100vh;position:relative;overflow-x:hidden}.bg-animation{position:fixed;top:0;left:0;width:100%;height:100%;overflow:hidden;z-index:-1}.gradient-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5;animation:float 20s infinite ease-in-out}.orb-1{width:400px;height:400px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));top:-100px;left:-100px;animation-delay:0s}.orb-2{width:500px;height:500px;background:linear-gradient(135deg,var(--secondary-color),var(--accent-color));bottom:-150px;right:-150px;animation-delay:5s}.orb-3{width:350px;height:350px;background:linear-gradient(135deg,var(--accent-color),var(--primary-color));top:50%;left:50%;transform:translate(-50%,-50%);animation-delay:10s}@keyframes float{0%,to{transform:translate(0) scale(1)}33%{transform:translate(50px,-50px) scale(1.1)}66%{transform:translate(-30px,30px) scale(.9)}}:root{--primary-color: #6366f1;--secondary-color: #8b5cf6;--accent-color: #ec4899;--bg-dark: #0f172a;--bg-darker: #020617;--bg-light: #1e293b;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--border-color: #334155;--success-color: #10b981;--error-color: #ef4444;--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .5), 0 10px 10px -5px rgba(0, 0, 0, .3);--shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, .7)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-darker);color:var(--text-primary);overflow:hidden}#root{width:100vw;height:100vh;overflow:hidden}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#475569}::selection{background:var(--primary-color);color:#fff}