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40px);max-width:800px;background:#2d2d2df2;padding:12px;border-radius:30px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 8px 32px #0006;border:1px solid rgba(255,255,255,.1)}.file-upload-btn{background:linear-gradient(135deg,red 0% 100%);border:none;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;flex-shrink:0}.file-upload-btn:hover{transform:scale(1.1);box-shadow:0 0 20px red}.file-upload-btn svg{color:#fff}.chat-input{flex:1;background:transparent;border:none;outline:none;color:#fff;font-size:16px;padding:10px 15px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.chat-input::placeholder{color:#ffffff80}.send-btn{background:linear-gradient(135deg,#fc0000,red);border:none;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;flex-shrink:0}.send-btn:hover{transform:scale(1.1);box-shadow:0 0 20px #667eea99}.send-btn svg{color:#fff}.quiz-btn{position:fixed;bottom:29px;right:30px;background:linear-gradient(135deg,red 0% 100%);color:#fff;border:none;padding:14px 28px;border-radius:25px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #f5576c66;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.quiz-btn:hover{transform:translateY(-2px);box-shadow:0 6px 25px #f5576c99}.chat-messages::-webkit-scrollbar{width:8px}.chat-messages::-webkit-scrollbar-track{background:#ffffff0d;border-radius:10px}.chat-messages::-webkit-scrollbar-thumb{background:#667eea80;border-radius:10px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#667eeacc}.slide-up{animation:slideUpOut .6s ease-in-out forwards}@keyframes slideUpOut{0%{transform:translateY(0);opacity:1}to{transform:translateY(-100%);opacity:0}}