.roi-calculator-container{--roi-primary: #4f46e5;--roi-secondary: #6366f1;--roi-accent: #818cf8;--roi-light: #e0e7ff;--roi-bg: #eef2ff;--roi-text: #1f2937;--roi-text-light: #6b7280;--roi-success: #10b981;--roi-danger: #ef4444;--roi-border: #e5e7eb;--roi-radius: 12px;--roi-shadow: 0 4px 6px -1px rgba(0,0,0,.1);--roi-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}.roi-header{text-align:center;margin-bottom:2rem}.roi-title{font-size:2rem;font-weight:800;color:var(--roi-primary);margin:0 0 .5rem}.roi-description{color:var(--roi-text-light);font-size:1.1rem;margin:0}.roi-formula-container{background:linear-gradient(135deg,var(--roi-bg) 0%,var(--roi-light) 100%);border-radius:var(--roi-radius);padding:1.5rem;margin-bottom:1.5rem;border:1px solid var(--roi-border)}.roi-formula-title{font-size:1.1rem;font-weight:700;color:var(--roi-primary);margin:0 0 1rem;text-align:center}.roi-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}.roi-formula-card{background:#fff;border-radius:8px;padding:1rem;text-align:center;box-shadow:var(--roi-shadow)}.roi-formula-label{font-size:.85rem;font-weight:600;color:var(--roi-secondary);margin:0 0 .5rem}.roi-formula-math{font-size:.95rem;color:var(--roi-text);overflow-x:auto}.roi-form{background:#fff;border-radius:var(--roi-radius);padding:1.5rem;box-shadow:var(--roi-shadow);margin-bottom:1.5rem}.roi-input-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}.roi-input-group{display:flex;flex-direction:column}.roi-label{font-size:.85rem;font-weight:600;color:var(--roi-text);margin-bottom:.5rem}.roi-input-wrapper{position:relative;display:flex;align-items:center}.roi-input-prefix{position:absolute;left:1rem;color:var(--roi-text-light);font-weight:600}.roi-input{width:100%;padding:.75rem 1rem;border:2px solid var(--roi-border);border-radius:8px;font-size:1rem;transition:all .2s ease}.roi-input.with-prefix{padding-left:2rem}.roi-input:focus{outline:none;border-color:var(--roi-primary);box-shadow:0 0 0 3px #4f46e51a}.roi-button-group{display:flex;gap:1rem}.roi-calculate-btn{flex:1;padding:1rem;background:linear-gradient(135deg,var(--roi-primary),var(--roi-secondary));color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .3s ease}.roi-calculate-btn:hover{transform:translateY(-2px);box-shadow:var(--roi-shadow-lg)}.roi-reset-btn{padding:1rem 1.5rem;background:var(--roi-border);color:var(--roi-text);border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.roi-reset-btn:hover{background:#d1d5db}.roi-results{background:linear-gradient(135deg,var(--roi-primary),var(--roi-secondary));border-radius:var(--roi-radius);padding:1.5rem;margin-bottom:2rem}.roi-results-title{color:#fff;font-size:1.25rem;font-weight:700;margin:0 0 1rem;text-align:center}.roi-results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.75rem;margin-bottom:1.5rem}.roi-result-card{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;padding:1rem;text-align:center}.roi-result-card.primary{background:#fffffff2}.roi-result-card.primary .result-label,.roi-result-card.primary .result-value{color:var(--roi-primary)}.roi-result-card.primary.positive .result-value{color:var(--roi-success)}.roi-result-card.primary.negative .result-value{color:var(--roi-danger)}.roi-result-card.highlight{background:#ffffffe6}.roi-result-card.highlight .result-label,.roi-result-card.highlight .result-value{color:var(--roi-secondary)}.roi-result-card .result-label{display:block;font-size:.75rem;color:#ffffffe6;margin-bottom:.25rem;font-weight:500}.roi-result-card .result-value{display:block;font-size:1.25rem;font-weight:800;color:#fff}.roi-indicator{margin-top:1rem}.roi-indicator-bar{background:#fff3;border-radius:10px;height:12px;overflow:hidden}.roi-indicator-fill{height:100%;width:0%;border-radius:10px;transition:width .5s ease,background .3s ease;background:linear-gradient(90deg,#22c55e,#10b981)}.roi-indicator-labels{display:flex;justify-content:space-between;margin-top:.5rem;font-size:.75rem;color:#fffc}.roi-content{margin-top:2rem}.roi-content-section{margin-bottom:2.5rem}.roi-section-title{font-size:1.5rem;font-weight:700;color:var(--roi-primary);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--roi-light)}.roi-paragraph{color:var(--roi-text);line-height:1.7;margin:0 0 1rem}.roi-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1.5rem 0}.roi-feature-card{background:var(--roi-bg);border-radius:10px;padding:1.25rem;text-align:center;border:1px solid var(--roi-border)}.roi-feature-card .feature-icon{font-size:2rem;display:block;margin-bottom:.5rem}.roi-feature-card .feature-title{font-size:1rem;font-weight:700;color:var(--roi-primary);margin:0 0 .5rem}.roi-feature-card .feature-desc{font-size:.85rem;color:var(--roi-text-light);margin:0}.roi-subsection{margin:1.5rem 0;padding:1.5rem;background:#fff;border-radius:10px;border:1px solid var(--roi-border)}.roi-subsection-title{font-size:1.1rem;font-weight:700;color:var(--roi-secondary);margin:0 0 1rem}.roi-steps-list{display:flex;flex-direction:column;gap:1rem}.roi-step-item{padding-left:1rem;border-left:3px solid var(--roi-accent)}.roi-step-item .step-label{font-weight:700;color:var(--roi-primary);display:block;margin-bottom:.25rem}.roi-step-item .step-desc{font-size:.9rem;color:var(--roi-text);margin:0;line-height:1.6}@media (max-width: 640px){.roi-title{font-size:1.5rem}.roi-formula-grid,.roi-input-grid{grid-template-columns:1fr}.roi-button-group{flex-direction:column}.roi-results-grid{grid-template-columns:repeat(2,1fr)}}