:root{--primary:#3498db;--secondary:#2ecc71;--dark:#2c3e50;--light:#ecf0f1;--danger:#e74c3c}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6}.header{text-align:center;margin-bottom:30px}.header h1{color:var(--dark);margin-bottom:10px;font-size:2.2em}.header p{color:#7f8c8d}.tabs{display:flex;margin-bottom:20px;border-bottom:2px solid #ddd}.tab{padding:12px 25px;cursor:pointer;font-weight:700;color:#7f8c8d;transition:all .3s;border-bottom:3px solid transparent}.tab.active{color:var(--primary);border-bottom:3px solid var(--primary)}.calculator{background:#fff;border-radius:10px;padding:30px;box-shadow:0 5px 15px rgba(0,0,0,.1);margin-bottom:30px}.form-row{display:flex;gap:20px;margin-bottom:20px}.form-group{flex:1;margin-bottom:0}label{display:block;margin-bottom:8px;font-weight:600;color:var(--dark)}input[type=number],select{width:100%;border:1px solid #ddd;border-radius:6px;font-size:16px;transition:border .3s}input[type=number]:focus,select:focus{border-color:var(--primary);outline:none}.radio-group{display:flex;gap:15px;margin-bottom:15px}.radio-group label{display:flex;align-items:center;gap:8px;cursor:pointer;font-weight:400}button{background:var(--primary);color:#fff;border:none;padding:14px 20px;border-radius:6px;cursor:pointer;font-size:16px;font-weight:700;width:100%;transition:background .3s;margin-top:10px}button:hover{background:#2980b9}.button-secondary{background:var(--secondary)}.button-secondary:hover{background:#27ae60}.result{margin-top:30px;padding:20px;background:#f8f9fa;border-radius:8px;display:none;border-left:4px solid var(--primary)}.result h2{color:var(--dark);margin-top:0;font-size:1.5em}.highlight{font-size:28px;color:var(--secondary);font-weight:700;margin:10px 0}.result-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:20px}.result-item{background:#fff;padding:15px;border-radius:6px;box-shadow:0 2px 5px rgba(0,0,0,.05)}.result-item h3{margin-top:0;color:#7f8c8d;font-size:1em}.chart-container{margin-top:30px;height:300px}#payment-schedule{margin-top:30px;display:none}table{width:100%;border-collapse:collapse;margin-top:15px;box-shadow:0 1px 3px rgba(0,0,0,.1)}th,td{border:1px solid #ddd;padding:12px;text-align:left}th{background-color:var(--dark);color:#fff}tr:nth-child(even){background-color:#f2f2f2}tr:hover{background-color:#e9e9e9}.tooltip{position:relative;display:inline-block;margin-left:5px;color:var(--primary);cursor:help}.tooltip .tooltiptext{visibility:hidden;width:200px;background-color:var(--dark);color:#fff;text-align:center;border-radius:6px;padding:5px;position:absolute;z-index:1;bottom:125%;left:50%;transform:translateX(-50%);opacity:0;transition:opacity .3s;font-size:14px;font-weight:400}.tooltip:hover .tooltiptext{visibility:visible;opacity:1}.time-unit-toggle{display:flex;background:#e0e0e0;border-radius:6px;padding:4px;margin-bottom:15px}.time-unit-toggle button{flex:1;padding:8px;margin:0;background:0 0;color:#555;border-radius:4px;font-size:14px}.time-unit-toggle button.active{background:var(--primary);color:#fff}@media (max-width:768px){.form-row{flex-direction:column;gap:15px}.result-grid{grid-template-columns:1fr}.chart-container{display:none}button[onclick="showInvestmentSchedule()"],button[onclick="showCreditSchedule()"],button[onclick="exportInvestmentToExcel()"],button[onClick="exportCreditToExcel()"]{display:none}#investment-schedule,#credit-payment-schedule{display:none !important}.radio-group{flex-direction:column;gap:10px}.radio-group label{white-space:normal;word-break:break-word}}