:root{--app-bg:#f3f6f9;--surface:#ffffff;--surface-soft:#f8fafd;--ink:#0f172a;--muted:#64748b;--border:#e2e8f0;--brand:#6366f1;--brand-strong:#4f46e5;--brand-light:#e0e7ff;--success:#10b981;--highlight:#3b82f6;--danger:#ef4444;--danger-light:#fee2e2;--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.05);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.05),0 2px 4px -1px rgba(0, 0, 0, 0.03);--shadow-lg:0 20px 40px -10px rgba(15, 23, 42, 0.08);--chart-c1:#3b82f6;--chart-c2:#f59e0b}[data-bs-theme=dark]{--app-bg:#0b0f19;--surface:#131b2c;--surface-soft:#1e293b;--ink:#f8fafc;--muted:#94a3b8;--border:#2e3b52;--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.3);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.4);--shadow-lg:0 25px 50px -12px rgba(0, 0, 0, 0.5);--brand:#818cf8;--brand-strong:#a5b4fc;--brand-light:rgba(99, 102, 241, 0.15);--danger:#f87171;--danger-light:rgba(239, 68, 68, 0.15);--chart-c1:#60a5fa;--chart-c2:#fbbf24}body{min-height:100vh;margin:0;color:var(--ink);background:var(--app-bg);font-family:"Plus Jakarta 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ease;display:flex;flex-direction:column;overflow-y:auto;height:calc(100vh - 48px)}.workspace-content{flex:1;max-width:900px;margin:0 auto;width:100%}.theme-toggle-btn{background:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:50px;padding:8px 16px;cursor:pointer;display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:600;transition:all .2s ease;box-shadow:var(--shadow-sm)}.theme-toggle-btn:hover{background:var(--surface-soft);border-color:var(--muted);transform:translateY(-1px)}.desktop-actions{position:absolute;top:24px;right:24px;z-index:10;display:flex;gap:12px}.theme-toggle-desktop{position:static}.theme-toggle-mobile{padding:0;width:40px;height:40px;justify-content:center}.mobile-tool-picker{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding:12px 16px;background:var(--surface-soft);border:1px solid 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ease;min-width:54px;justify-content:center}.form-range{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:8px;background:var(--border);outline:0;padding:0;margin-top:14px;transition:background .15s ease-in-out}.form-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:24px;height:24px;border-radius:50%;background:var(--surface);cursor:pointer;border:5px solid var(--brand);box-shadow:0 2px 6px rgba(0,0,0,.15);margin-top:-8px;transition:transform .1s}.form-range::-webkit-slider-thumb:active,.form-range::-webkit-slider-thumb:hover{transform:scale(1.15)}.form-range::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--surface);cursor:pointer;border:5px solid var(--brand);box-shadow:0 2px 6px rgba(0,0,0,.15);transition:transform .1s}.form-range::-moz-range-thumb:active,.form-range::-moz-range-thumb:hover{transform:scale(1.15)}.form-range::-webkit-slider-runnable-track{height:8px;cursor:pointer;background:0 0;border-radius:8px}.form-range::-moz-range-track{height:8px;cursor:pointer;background:0 0;border-radius:8px}.prepay-toggle-btn{background:var(--surface);color:var(--brand);border:1px dashed var(--brand);border-radius:12px;padding:14px 20px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:10px;width:100%;transition:all .3s ease}.prepay-toggle-btn:hover{background:var(--brand-light)}.prepay-toggle-btn .toggle-icon{transition:transform .3s ease}.prepay-toggle-btn.collapsed .toggle-icon{transform:rotate(-90deg)}.prepay-box{background:var(--surface-soft);border:1px solid var(--border);border-radius:12px;padding:20px;margin-top:16px;display:flex;flex-direction:column;gap:16px}.btn-add-prepay{color:var(--brand-strong);background:var(--brand-light);border:none;border-radius:8px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:all .2s}.btn-add-prepay:hover{background:var(--brand);color:#fff}.btn-remove-prepay{color:var(--danger);background:var(--danger-light);border:none;border-radius:8px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;transition:all .2s}.btn-remove-prepay:hover{background:var(--danger);color:#fff}.prepay-entry-row{animation:slideInRow .2s ease forwards}@keyframes slideInRow{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}.results-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 28px;background:var(--surface-soft);border-bottom:1px solid var(--border);transition:background-color .4s ease,border-color .4s ease}.results-header i{font-size:1.25rem}.results-body{padding:28px}.metric-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px dashed var(--border);transition:border-color .4s 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td{color:var(--brand-strong);font-weight:700}.schedule-table tr:last-child td{border-bottom:none}@keyframes slideIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@keyframes slideOut{from{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-4px)}}.animating-in{animation:slideIn .2s ease forwards}.animating-out{animation:slideOut .2s ease forwards}.modal-content{background-color:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-lg);transition:background-color .4s ease,color .4s ease,border-color .4s ease}.modal-content h5,.modal-content p{color:var(--ink)}.modal-body .text-muted{color:var(--muted)!important}.modal-footer,.modal-header{border-color:var(--border);padding:20px 24px}.modal-body{padding:24px}.btn-brand{background-color:var(--brand);color:#fff;border:none;font-weight:700;padding:10px 24px;border-radius:10px;transition:all .2s;box-shadow:0 4px 12px rgba(99,102,241,.3)}.btn-brand:hover{background-color:var(--brand-strong);color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(99,102,241,.4)}@media (max-width:991.98px){body{padding:0;background:var(--surface)}.app-shell{display:block;min-height:100vh;border:0;border-radius:0;box-shadow:none}.workspace{padding:20px;height:auto}.tool-header{flex-direction:column;margin-bottom:24px;gap:12px}.input-panel{padding:20px}.results-body,.results-header{padding:20px}}.custom-tab-btn{font-weight:600;border-radius:50px;padding:8px 20px;background:var(--bg-card-secondary);color:var(--muted);border:1px solid var(--border);transition:all .3s ease}.custom-tab-btn:hover{border-color:var(--brand-light);color:var(--brand)}.custom-tab-btn.active,.nav-pills .nav-link.custom-tab-btn.active{background:var(--brand);color:#fff!important;border-color:var(--brand);box-shadow:0 4px 12px rgba(99,102,241,.3)}.compare-tab-btn{font-weight:600;border-radius:50px;padding:8px 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