.pe-calc{--pe-primary: #2563eb;--pe-secondary: #3b82f6;--pe-accent: #93c5fd;--pe-bg: #eff6ff;--pe-card-bg: #ffffff;--pe-text: #1e3a8a;--pe-text-muted: #1d4ed8;--pe-border: #bfdbfe;--pe-shadow: 0 4px 20px rgba(37, 99, 235, .12);max-width:900px;margin:0 auto;font-family:system-ui,-apple-system,sans-serif}.pe-header{text-align:center;margin-bottom:2rem}.pe-title{font-size:2rem;font-weight:800;color:var(--pe-primary);margin:0 0 .5rem}.pe-description{color:var(--pe-text-muted);font-size:1.1rem;margin:0}.pe-formula-container{background:linear-gradient(135deg,var(--pe-bg) 0%,#dbeafe 100%);border-radius:16px;padding:1.5rem;margin-bottom:2rem;border:1px solid var(--pe-border)}.pe-formula-title{font-size:1.1rem;font-weight:700;color:var(--pe-primary);margin:0 0 1rem;text-align:center}.pe-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.pe-formula-card{background:var(--pe-card-bg);border-radius:12px;padding:1rem;text-align:center}.pe-formula-label{display:block;font-size:.85rem;font-weight:600;color:var(--pe-text-muted);margin-bottom:.5rem}.pe-formula-math{font-size:.9rem;color:var(--pe-text);overflow-x:auto}.pe-form-container{background:var(--pe-card-bg);border-radius:16px;padding:1.5rem;box-shadow:var(--pe-shadow);margin-bottom:2rem}.pe-form{display:flex;flex-direction:column;gap:1.25rem}.pe-input-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.pe-input-group{display:flex;flex-direction:column;gap:.5rem}.pe-label{font-weight:600;font-size:.9rem;color:var(--pe-text)}.pe-input{width:100%;padding:.875rem 1rem;border:2px solid var(--pe-border);border-radius:10px;font-size:1rem;background:var(--pe-bg);box-sizing:border-box}.pe-input:focus{outline:none;border-color:var(--pe-primary);background:#fff}.pe-buttons{display:flex;gap:1rem;margin-top:.5rem}.pe-btn{flex:1;padding:1rem;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer}.pe-btn-primary{background:linear-gradient(135deg,var(--pe-primary) 0%,var(--pe-secondary) 100%);color:#fff}.pe-btn-secondary{background:var(--pe-bg);color:var(--pe-text-muted);border:2px solid var(--pe-border)}.pe-results{background:var(--pe-card-bg);border-radius:16px;padding:1.5rem;box-shadow:var(--pe-shadow);margin-bottom:2rem}.pe-results-title{font-size:1.25rem;font-weight:700;color:var(--pe-primary);margin:0 0 1.5rem;text-align:center}.pe-results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}.pe-result-card{background:var(--pe-bg);border-radius:12px;padding:1.25rem;text-align:center}.pe-result-main{grid-column:1 / -1;background:linear-gradient(135deg,var(--pe-primary) 0%,var(--pe-secondary) 100%)}.pe-result-main .pe-result-label,.pe-result-main .pe-result-value{color:#fff}.pe-result-label{display:block;font-size:.8rem;font-weight:600;color:var(--pe-text-muted);margin-bottom:.25rem}.pe-result-value{display:block;font-size:1.75rem;font-weight:800;color:var(--pe-primary)}.pe-content{margin-top:3rem}.pe-content-section{margin-bottom:2.5rem}.pe-content-title{font-size:1.5rem;font-weight:700;color:var(--pe-text);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--pe-primary)}.pe-content-text{color:var(--pe-text-muted);line-height:1.7;margin:0 0 1rem}.pe-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}.pe-feature-card{background:var(--pe-bg);border-radius:12px;padding:1.25rem;text-align:center}.pe-feature-icon{font-size:2rem;display:block;margin-bottom:.75rem}.pe-feature-title{font-size:1rem;font-weight:700;color:var(--pe-text);margin:0 0 .5rem}.pe-feature-desc{font-size:.85rem;color:var(--pe-text-muted);margin:0}.pe-table-wrapper{overflow-x:auto;border-radius:12px;margin-top:1.5rem}.pe-table{width:100%;border-collapse:collapse;background:#fff;font-size:.9rem}.pe-table th{background:var(--pe-primary);color:#fff;padding:.875rem 1rem;text-align:left}.pe-table td{padding:.75rem 1rem;border-bottom:1px solid var(--pe-border)}.pe-table-highlight{font-weight:700;color:var(--pe-primary)}.pe-tips-grid{display:grid;gap:1rem;margin-top:1.5rem}.pe-tip-card{display:flex;gap:1rem;background:var(--pe-card-bg);border-radius:12px;padding:1.25rem;border-left:4px solid var(--pe-primary)}.pe-tip-icon{font-size:1.5rem}.pe-tip-title{font-size:1rem;font-weight:700;color:var(--pe-text);margin:0 0 .5rem}.pe-tip-text{font-size:.9rem;color:var(--pe-text-muted);margin:0}.pe-faqs{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.pe-faq-item{background:var(--pe-card-bg);border-radius:12px;padding:1.25rem}.pe-faq-question{font-size:1rem;font-weight:700;color:var(--pe-primary);margin:0 0 .75rem}.pe-faq-answer{font-size:.9rem;color:var(--pe-text-muted);margin:0;line-height:1.6}@media (max-width: 768px){.pe-input-grid{grid-template-columns:1fr}.pe-results-grid{grid-template-columns:repeat(2,1fr)}}