:root{--apple-blue:#007AFF;--apple-gray:#8E8E93;--apple-light-gray:#F2F2F7;--apple-dark:#1D1D1F;--apple-green:#34C759;--apple-red:#FF3B30}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:#f8f9fa;color:#1d1d1f;line-height:1.6}.card{border-radius:8px;overflow:hidden;border:none;transition:transform .3s ease,box-shadow .3s ease}.card:hover{transform:translateY(-5px);box-shadow:0 10px 25px rgba(0,0,0,.1)!important}.card-header{border-bottom:none;padding:1rem 1.5rem}.btn{border-radius:4px;font-weight:500;padding:.5rem 1.5rem;transition:all .2s ease}.btn-primary{background-color:#007aff;border-color:#007aff}.btn-primary:hover{background-color:#0056cc;border-color:#0056cc;transform:translateY(-2px)}.btn-lg{padding:.75rem 2rem;font-size:1.1rem}.form-control,.form-select{border-radius:4px;border:1px solid #d1d1d6;padding:.75rem 1rem;transition:border-color .2s ease}.form-control:focus,.form-select:focus{border-color:#007aff;box-shadow:0 0 0 3px rgba(0,122,255,.1)}.form-label{font-weight:600;margin-bottom:.5rem;color:#1d1d1f}input[type=text].form-control.text-end{font-family:"SF Mono",Monaco,Consolas,monospace;font-weight:500;letter-spacing:.5px}.number-in-words{font-style:italic;color:#666;margin-top:4px;padding-left:5px;border-left:3px solid #007aff;background-color:rgba(0,122,255,.05);padding:6px 10px;border-radius:2px;font-size:.9rem}.table{border-radius:4px;overflow:hidden}.table thead th{background-color:#f2f2f7;border-bottom:2px solid #d1d1d6;font-weight:600;color:#1d1d1f}.chart-container{position:relative;height:300px;width:100%}.navbar{box-shadow:0 2px 10px rgba(0,0,0,.08)}.navbar-brand{font-weight:700;font-size:1.5rem}.alert{border-radius:10px;border:none}.accordion-button{font-weight:600;border-radius:4px!important;padding:1rem 1.25rem}.accordion-button:not(.collapsed){background-color:rgba(0,122,255,.1);color:#007aff}#futureValue,#growthRate,#totalInterest,#totalInvestment{font-weight:700;font-family:"SF Mono",Monaco,Consolas,monospace;animation:fadeIn .5s ease-out}code{background-color:#f8f9fa;padding:.2rem .4rem;border-radius:2px;font-size:.9em;color:#e83e8c;word-break:break-word;white-space:pre-wrap}footer{background-color:#f2f2f7}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.chart-container{height:250px}.display-4{font-size:2.5rem}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#a1a1a1}