.rng-calc{--rng-primary: #6366f1;--rng-secondary: #818cf8;--rng-accent: #a5b4fc;--rng-bg: #eef2ff;--rng-card-bg: #ffffff;--rng-text: #3730a3;--rng-text-muted: #4f46e5;--rng-border: #c7d2fe;--rng-shadow: 0 4px 20px rgba(99, 102, 241, .12);max-width:900px;margin:0 auto;font-family:system-ui,-apple-system,sans-serif}.rng-header{text-align:center;margin-bottom:2rem}.rng-title{font-size:2rem;font-weight:800;color:var(--rng-primary);margin:0 0 .5rem}.rng-description{color:var(--rng-text-muted);font-size:1.1rem;margin:0}.rng-formula-container{background:linear-gradient(135deg,var(--rng-bg) 0%,#e0e7ff 100%);border-radius:16px;padding:1.5rem;margin-bottom:2rem;border:1px solid var(--rng-border)}.rng-formula-title{font-size:1.1rem;font-weight:700;color:var(--rng-primary);margin:0 0 1rem;text-align:center}.rng-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.rng-formula-card{background:var(--rng-card-bg);border-radius:12px;padding:1rem;text-align:center}.rng-formula-label{display:block;font-size:.85rem;font-weight:600;color:var(--rng-text-muted);margin-bottom:.5rem}.rng-formula-math{font-size:.9rem;color:var(--rng-text);overflow-x:auto}.rng-form-container{background:var(--rng-card-bg);border-radius:16px;padding:1.5rem;box-shadow:var(--rng-shadow);margin-bottom:2rem}.rng-form{display:flex;flex-direction:column;gap:1.25rem}.rng-input-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;align-items:end}.rng-input-group{display:flex;flex-direction:column;gap:.5rem}.rng-checkbox-group{justify-content:flex-end;padding-bottom:.75rem}.rng-label{font-weight:600;font-size:.9rem;color:var(--rng-text)}.rng-input{width:100%;padding:.875rem 1rem;border:2px solid var(--rng-border);border-radius:10px;font-size:1rem;background:var(--rng-bg);box-sizing:border-box}.rng-input:focus{outline:none;border-color:var(--rng-primary);background:#fff}.rng-checkbox-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;color:var(--rng-text);font-weight:600;font-size:.9rem}.rng-buttons{display:flex;gap:1rem;margin-top:.5rem}.rng-btn{flex:1;padding:1rem;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer}.rng-btn-primary{background:linear-gradient(135deg,var(--rng-primary) 0%,var(--rng-secondary) 100%);color:#fff}.rng-btn-secondary{background:var(--rng-bg);color:var(--rng-text-muted);border:2px solid var(--rng-border)}.rng-results{background:var(--rng-card-bg);border-radius:16px;padding:1.5rem;box-shadow:var(--rng-shadow);margin-bottom:2rem}.rng-results-title{font-size:1.25rem;font-weight:700;color:var(--rng-primary);margin:0 0 1.5rem;text-align:center}.rng-main-result{background:linear-gradient(135deg,var(--rng-primary) 0%,var(--rng-secondary) 100%);border-radius:16px;padding:1.5rem;margin-bottom:1rem;text-align:center}.rng-main-label{display:block;font-size:.9rem;color:#ffffffe6;margin-bottom:1rem}.rng-numbers-display{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.rng-number{background:#fff;color:var(--rng-primary);font-size:1.5rem;font-weight:800;padding:.75rem 1.25rem;border-radius:12px;min-width:3rem;text-align:center}.rng-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.rng-stat-card{background:var(--rng-bg);border-radius:12px;padding:1rem;text-align:center}.rng-stat-label{display:block;font-size:.8rem;font-weight:600;color:var(--rng-text-muted);margin-bottom:.25rem}.rng-stat-value{font-size:1.25rem;font-weight:800;color:var(--rng-primary)}.rng-content{margin-top:3rem}.rng-content-section{margin-bottom:2.5rem}.rng-content-title{font-size:1.5rem;font-weight:700;color:var(--rng-text);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--rng-primary)}.rng-content-text{color:var(--rng-text-muted);line-height:1.7;margin:0 0 1rem}.rng-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}.rng-feature-card{background:var(--rng-bg);border-radius:12px;padding:1.25rem;text-align:center}.rng-feature-icon{font-size:2rem;display:block;margin-bottom:.75rem}.rng-feature-title{font-size:1rem;font-weight:700;color:var(--rng-text);margin:0 0 .5rem}.rng-feature-desc{font-size:.85rem;color:var(--rng-text-muted);margin:0}.rng-table-wrapper{overflow-x:auto;border-radius:12px;margin-top:1.5rem}.rng-table{width:100%;border-collapse:collapse;background:#fff;font-size:.9rem}.rng-table th{background:var(--rng-primary);color:#fff;padding:.875rem 1rem;text-align:left}.rng-table td{padding:.75rem 1rem;border-bottom:1px solid var(--rng-border)}.rng-table-highlight{font-weight:700;color:var(--rng-primary)}.rng-tips-grid{display:grid;gap:1rem;margin-top:1.5rem}.rng-tip-card{display:flex;gap:1rem;background:var(--rng-card-bg);border-radius:12px;padding:1.25rem;border-left:4px solid var(--rng-primary)}.rng-tip-icon{font-size:1.5rem}.rng-tip-title{font-size:1rem;font-weight:700;color:var(--rng-text);margin:0 0 .5rem}.rng-tip-text{font-size:.9rem;color:var(--rng-text-muted);margin:0}.rng-faqs{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.rng-faq-item{background:var(--rng-card-bg);border-radius:12px;padding:1.25rem}.rng-faq-question{font-size:1rem;font-weight:700;color:var(--rng-primary);margin:0 0 .75rem}.rng-faq-answer{font-size:.9rem;color:var(--rng-text-muted);margin:0;line-height:1.6}@media (max-width: 768px){.rng-input-grid{grid-template-columns:1fr 1fr}.rng-number{font-size:1.25rem;padding:.5rem 1rem}}