.si-calculator-container{--si-primary: #7c3aed;--si-secondary: #8b5cf6;--si-accent: #a78bfa;--si-light: #ede9fe;--si-bg: #f5f3ff;--si-text: #1f2937;--si-text-light: #6b7280;--si-success: #10b981;--si-border: #e5e7eb;--si-radius: 12px;--si-shadow: 0 4px 6px -1px rgba(0,0,0,.1);--si-shadow-lg: 0 10px 25px -5px rgba(0,0,0,.15);max-width:900px;margin:0 auto;font-family:system-ui,-apple-system,sans-serif}.si-header{text-align:center;margin-bottom:2rem}.si-title{font-size:2rem;font-weight:800;color:var(--si-primary);margin:0 0 .5rem}.si-description{color:var(--si-text-light);font-size:1.1rem;margin:0}.si-formula-container{background:linear-gradient(135deg,var(--si-bg) 0%,var(--si-light) 100%);border-radius:var(--si-radius);padding:1.5rem;margin-bottom:1.5rem;border:1px solid var(--si-border)}.si-formula-title{font-size:1.1rem;font-weight:700;color:var(--si-primary);margin:0 0 1rem;text-align:center}.si-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem}.si-formula-card{background:#fff;border-radius:8px;padding:1rem;text-align:center;box-shadow:var(--si-shadow)}.si-formula-label{font-size:.85rem;font-weight:600;color:var(--si-secondary);margin:0 0 .5rem}.si-formula-math{font-size:.95rem;color:var(--si-text);overflow-x:auto}.si-mode-section{margin-bottom:1.5rem}.si-mode-title{font-size:1rem;font-weight:600;color:var(--si-text);margin:0 0 .75rem;text-align:center}.si-mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.5rem}.si-mode-btn{display:flex;flex-direction:column;align-items:center;padding:.75rem;border:2px solid var(--si-border);background:#fff;border-radius:10px;cursor:pointer;transition:all .2s ease;text-align:center}.si-mode-btn:hover{border-color:var(--si-accent)}.si-mode-btn.active{border-color:var(--si-primary);background:var(--si-light)}.si-mode-btn .mode-label{font-weight:700;color:var(--si-text);font-size:.9rem}.si-mode-btn .mode-desc{font-size:.7rem;color:var(--si-text-light);margin-top:.25rem}.si-form{background:#fff;border-radius:var(--si-radius);padding:1.5rem;box-shadow:var(--si-shadow);margin-bottom:1.5rem}.si-input-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}.si-input-group{display:flex;flex-direction:column}.si-label{font-size:.85rem;font-weight:600;color:var(--si-text);margin-bottom:.5rem}.si-input-wrapper{position:relative;display:flex;align-items:center}.si-input-prefix{position:absolute;left:1rem;color:var(--si-text-light);font-weight:600}.si-input-suffix{position:absolute;right:1rem;color:var(--si-text-light);font-weight:600}.si-input{width:100%;padding:.75rem 1rem;border:2px solid var(--si-border);border-radius:8px;font-size:1rem;transition:all .2s ease}.si-input.with-prefix{padding-left:2rem}.si-input.with-suffix{padding-right:2.5rem}.si-input:focus{outline:none;border-color:var(--si-primary);box-shadow:0 0 0 3px #7c3aed1a}.si-button-group{display:flex;gap:1rem}.si-calculate-btn{flex:1;padding:1rem;background:linear-gradient(135deg,var(--si-primary),var(--si-secondary));color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .3s ease}.si-calculate-btn:hover{transform:translateY(-2px);box-shadow:var(--si-shadow-lg)}.si-reset-btn{padding:1rem 1.5rem;background:var(--si-border);color:var(--si-text);border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.si-reset-btn:hover{background:#d1d5db}.si-results{background:linear-gradient(135deg,var(--si-primary),var(--si-secondary));border-radius:var(--si-radius);padding:1.5rem;margin-bottom:2rem}.si-results-title{color:#fff;font-size:1.25rem;font-weight:700;margin:0 0 1rem;text-align:center}.si-results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.75rem}.si-result-card{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;padding:1rem;text-align:center}.si-result-card.primary{background:#fffffff2}.si-result-card.primary .result-label,.si-result-card.primary .result-value{color:var(--si-primary)}.si-result-card.highlight{background:#ffffffe6}.si-result-card.highlight .result-label,.si-result-card.highlight .result-value{color:var(--si-secondary)}.si-result-card .result-label{display:block;font-size:.75rem;color:#ffffffe6;margin-bottom:.25rem;font-weight:500}.si-result-card .result-value{display:block;font-size:1.25rem;font-weight:800;color:#fff}.si-content{margin-top:2rem}.si-content-section{margin-bottom:2.5rem}.si-section-title{font-size:1.5rem;font-weight:700;color:var(--si-primary);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--si-light)}.si-paragraph{color:var(--si-text);line-height:1.7;margin:0 0 1rem}.si-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1.5rem 0}.si-feature-card{background:var(--si-bg);border-radius:10px;padding:1.25rem;text-align:center;border:1px solid var(--si-border)}.si-feature-card .feature-icon{font-size:2rem;display:block;margin-bottom:.5rem}.si-feature-card .feature-title{font-size:1rem;font-weight:700;color:var(--si-primary);margin:0 0 .5rem}.si-feature-card .feature-desc{font-size:.85rem;color:var(--si-text-light);margin:0}.si-subsection{margin:1.5rem 0;padding:1.5rem;background:#fff;border-radius:10px;border:1px solid var(--si-border)}.si-subsection-title{font-size:1.1rem;font-weight:700;color:var(--si-secondary);margin:0 0 1rem}.si-steps-list{display:flex;flex-direction:column;gap:1rem}.si-step-item{padding-left:1rem;border-left:3px solid var(--si-accent)}.si-step-item .step-label{font-weight:700;color:var(--si-primary);display:block;margin-bottom:.25rem}.si-step-item .step-desc{font-size:.9rem;color:var(--si-text);margin:0;line-height:1.6}.si-tips-grid{display:grid;gap:1rem;margin:1.5rem 0}.si-tip-card{display:flex;gap:1rem;padding:1.25rem;background:#fff;border-radius:10px;border:1px solid var(--si-border);box-shadow:var(--si-shadow)}.si-tip-card .tip-icon{font-size:1.5rem;flex-shrink:0}.si-tip-card .tip-content{flex:1}.si-tip-card .tip-title{font-size:1rem;font-weight:700;color:var(--si-primary);margin:0 0 .5rem}.si-tip-card .tip-text{font-size:.9rem;color:var(--si-text);line-height:1.6;margin:0}.si-table-wrapper{overflow-x:auto;margin:1.5rem 0;border-radius:10px;border:1px solid var(--si-border)}.si-table{width:100%;border-collapse:collapse;font-size:.9rem}.si-table th{background:var(--si-primary);color:#fff;padding:.75rem 1rem;text-align:left;font-weight:600}.si-table td{padding:.75rem 1rem;border-bottom:1px solid var(--si-border)}.si-table tr:nth-child(2n){background:var(--si-bg)}.si-table tr:hover{background:var(--si-light)}.si-faqs{margin:1.5rem 0}.si-faq{background:#fff;border:1px solid var(--si-border);border-radius:10px;margin-bottom:.5rem;overflow:hidden}.si-faq summary{padding:1rem 1.25rem;cursor:pointer;font-weight:600;color:var(--si-text);list-style:none;display:flex;justify-content:space-between;align-items:center}.si-faq summary::-webkit-details-marker{display:none}.si-faq summary:after{content:"+";font-size:1.25rem;color:var(--si-primary);font-weight:700}.si-faq[open] summary:after{content:"−"}.si-faq[open] summary{background:var(--si-bg);border-bottom:1px solid var(--si-border)}.si-faq .faq-answer{padding:1rem 1.25rem;margin:0;color:var(--si-text);line-height:1.6}@media (max-width: 640px){.si-title{font-size:1.5rem}.si-formula-grid,.si-mode-grid{grid-template-columns:repeat(2,1fr)}.si-button-group{flex-direction:column}.si-results-grid{grid-template-columns:repeat(2,1fr)}}