:root{--bg-color:#f1f5f9;--slide-bg:#fff;--text-main:#1e293b;--text-muted:#64748b;--primary:#2563eb;--primary-light:#eff6ff;--border-color:#e2e8f0;--shadow:0 10px 25px -5px #0000001a, 0 8px 10px -6px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body,html{background-color:var(--bg-color);color:var(--text-main);justify-content:center;align-items:center;height:100vh;font-family:Inter,sans-serif;display:flex;overflow:hidden}.presentation-wrapper{background:var(--slide-bg);flex-direction:column;width:100vw;max-width:1100px;height:100vh;display:flex;position:relative}@media (width>=769px){.presentation-wrapper{width:95vw;height:90vh;box-shadow:var(--shadow);border-radius:12px}}.slide-container{flex-grow:1;position:relative;overflow:hidden}.slide{flex-direction:column;padding:clamp(1.5rem,4vw,4rem);animation:.3s ease-in-out fadeIn;display:none;position:absolute;inset:0;overflow-y:auto}.slide.active{display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}h1{color:var(--text-main);margin-bottom:.5rem;font-size:clamp(2rem,5vw,3rem);font-weight:700;line-height:1.2}h1 span{color:var(--primary)}h2{color:var(--text-main);border-bottom:2px solid var(--primary-light);margin-bottom:1.5rem;padding-bottom:.75rem;font-size:clamp(1.5rem,4vw,2rem);font-weight:600}h3{color:var(--text-main);margin-bottom:1rem;font-size:clamp(1.1rem,3vw,1.25rem);font-weight:600}p,ul{color:var(--text-muted);margin-bottom:1.25rem;font-size:clamp(.95rem,2vw,1.05rem);line-height:1.6}ul{padding-left:1.5rem}li{margin-bottom:.5rem}strong{color:var(--text-main);font-weight:600}.subtitle{color:var(--text-main);margin-bottom:2rem;font-size:clamp(1.1rem,3vw,1.5rem);font-weight:400;line-height:1.4}.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.grid-3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;display:grid}.card{border:1px solid var(--border-color);background:#fff;border-radius:8px;padding:clamp(1rem,3vw,1.5rem);box-shadow:0 1px 3px #0000000d}.highlight-card{background:var(--primary-light);border:1px solid #bfdbfe}.flow-diagram{text-align:center;flex-direction:column;align-items:center;margin:1rem 0;display:flex}.flow-diagram.horizontal{flex-flow:wrap;justify-content:center;gap:10px}.flow-step{border:1px solid var(--border-color);background:#f8fafc;border-radius:6px;width:100%;max-width:300px;padding:.75rem 1rem;font-size:.95rem;font-weight:500}.flow-diagram.horizontal .flow-step{width:auto}.flow-arrow{color:var(--primary);margin:.25rem 0;font-size:1.25rem}.flow-diagram.horizontal .flow-arrow{margin:0 .5rem;transform:rotate(-90deg)}@media (width>=768px){.flow-diagram.horizontal .flow-arrow{transform:none}}.calculator-wrapper{border:1px solid var(--border-color);background:#f8fafc;border-radius:8px;grid-template-columns:1fr;gap:2rem;padding:clamp(1rem,3vw,2rem);display:grid}@media (width>=768px){.calculator-wrapper{grid-template-columns:1fr 1fr}}.preset-controls{flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem;display:flex}.preset-btn{border:1px solid var(--border-color);color:var(--text-muted);cursor:pointer;text-align:center;background:#fff;border-radius:6px;flex:1;padding:.5rem 1rem;font-size:.85rem;font-weight:500;transition:all .2s}.preset-btn:hover{background:#f1f5f9}.preset-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.calc-input-group{margin-bottom:1rem}.calc-input-group label{color:var(--text-main);justify-content:space-between;margin-bottom:.5rem;font-size:.9rem;font-weight:500;display:flex}.calc-input-group label span{color:var(--primary);font-weight:600}input[type=range]{width:100%;accent-color:var(--primary);cursor:pointer}.metrics-grid{grid-template-columns:1fr 1fr;gap:1rem;display:grid}.metric-box{border:1px solid var(--border-color);text-align:center;background:#fff;border-radius:8px;padding:1rem}.metric-box.primary-metric{background:var(--primary);color:#fff;border-color:var(--primary)}.metric-box span{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:.5rem;font-size:.7rem;font-weight:600;display:block}.metric-box.primary-metric span{color:#bfdbfe}.metric-box strong{color:var(--text-main);font-size:clamp(1.2rem,3vw,1.75rem);font-weight:700;display:block}.metric-box.primary-metric strong{color:#fff}.table-container{width:100%;overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:400px;margin-top:1rem}th,td{text-align:left;border-bottom:1px solid var(--border-color);padding:.75rem;font-size:.9rem}th{color:var(--text-main);background:#f8fafc;font-weight:600}td{color:var(--text-muted)}.footer-nav{border-top:1px solid var(--border-color);background:#fff;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:1rem clamp(1rem,4vw,4rem);display:flex}.nav-btn{border:1px solid var(--border-color);color:var(--text-main);cursor:pointer;background:#fff;border-radius:6px;padding:.5rem 1rem;font-size:.9rem;font-weight:500;transition:all .2s}.nav-btn:hover:not(:disabled){background:#f8fafc;border-color:#cbd5e1}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.slide-counter{color:var(--text-muted);text-align:center;font-size:.85rem;font-weight:500}@media (width<=400px){.slide-counter{order:-1;width:100%;margin-bottom:5px}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}