:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--accent:#667eea;--accent-secondary:#764ba2;--border:#ffffff1a;--card-bg:#ffffff0d}[data-theme=light]{--bg-primary:#f8fafc;--bg-secondary:#fff;--text-primary:#0f172a;--text-secondary:#64748b;--accent:#667eea;--accent-secondary:#764ba2;--border:#0000001a;--card-bg:#00000005}*{box-sizing:border-box;margin:0;padding:0}body,html{overflow-x:hidden;width:100%}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#0f172a;background:var(--bg-primary);color:#f8fafc;color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;transition:background .3s ease,color .3s ease}a{color:inherit;text-decoration:none}button{font-family:inherit}.site-header{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:var(--bg-secondary);border-bottom:1px solid var(--border);padding:1rem 2rem;position:-webkit-sticky;position:sticky;top:0;transition:background .3s ease,border-color .3s ease;z-index:100}.nav-container{align-items:center;display:flex;justify-content:space-between;margin:0 auto;max-width:1200px}.logo a{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,var(--accent) 0,var(--accent-secondary) 100%);-webkit-background-clip:text;background-clip:text;color:var(--text-primary);font-size:1.5rem;font-weight:800;text-decoration:none;transition:opacity .3s ease}.logo a:hover{opacity:.8}.nav-links{align-items:center;display:flex;gap:2rem;list-style:none;margin:0;padding:0}.nav-links a{color:var(--text-secondary);font-size:.95rem;font-weight:500;position:relative;text-decoration:none;transition:color .3s ease}.nav-links a:after{background:linear-gradient(135deg,var(--accent) 0,var(--accent-secondary) 100%);bottom:-4px;content:"";height:2px;left:0;position:absolute;transition:width .3s ease;width:0}.nav-links a:hover{color:var(--text-primary)}.nav-links a:hover:after{width:100%}.theme-toggle{align-items:center;background:var(--card-bg);border:1px solid var(--border);border-radius:50%;cursor:pointer;display:flex;font-size:1.25rem;height:40px;justify-content:center;transition:all .3s ease;width:40px}.theme-toggle:hover{background:var(--accent);border-color:var(--accent);transform:rotate(15deg)}@media (max-width:768px){.site-header{padding:1rem}.nav-container{flex-direction:column;gap:1rem}.nav-links{gap:1rem}}.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border);color:var(--text-secondary);margin-top:auto;padding:2rem;text-align:center;transition:background .3s ease,border-color .3s ease}.site-footer p{font-size:.875rem;margin:0}.main-layout{background:var(--bg-primary);display:flex;flex-direction:column;min-height:100vh;transition:background .3s ease}.main-layout main{flex:1 1;margin:0 auto;max-width:1200px;padding:2rem 1rem;width:100%}.home-page{align-items:center;color:#f8fafc;display:flex;flex-direction:column;justify-content:center;min-height:100vh;padding:2rem;text-align:center}.hero-section{animation:fadeInUp .8s ease-out;max-width:800px}.hero-title{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;background-clip:text;font-size:clamp(2.5rem,8vw,4rem);font-weight:800;letter-spacing:-.02em;line-height:1.1;margin-bottom:1.5rem}.hero-subtitle{color:#cbd5e1;font-size:clamp(1rem,2vw,1.25rem);line-height:1.6;margin-bottom:2.5rem;opacity:.9}.cta-button{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:50px;box-shadow:0 4px 15px #667eea66;color:#fff;cursor:pointer;font-size:1.125rem;font-weight:600;padding:1rem 2.5rem;transition:all .3s ease}.cta-button:hover{box-shadow:0 8px 25px #667eea80;transform:translateY(-2px)}.cta-button:active{transform:translateY(0)}.features-section{animation:fadeInUp .8s ease-out .2s backwards;margin-top:4rem}.feature-grid{grid-gap:2rem;display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));max-width:900px}.feature-item{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff0d;border:1px solid #ffffff1a;border-radius:20px;padding:2rem;transition:all .3s ease}.feature-item:hover{background:#ffffff14;border-color:#fff3;transform:translateY(-5px)}.feature-icon{font-size:2.5rem;margin-bottom:1rem}.feature-item h3{color:#f8fafc;font-size:1.25rem;font-weight:600;margin-bottom:.5rem}.feature-item p{color:#cbd5e1;font-size:.95rem;line-height:1.5}@media (max-width:768px){.home-page{padding:1rem}.feature-grid{gap:1rem;grid-template-columns:1fr}.features-section{margin-top:2rem}}.calculator-page{color:var(--text-primary);min-height:100vh;padding:2rem 1rem}.calculator-container{margin:0 auto;max-width:1000px}.calculator-title{-webkit-text-fill-color:#0000;animation:fadeInUp .6s ease-out;background:linear-gradient(135deg,var(--accent) 0,var(--accent-secondary) 100%);-webkit-background-clip:text;background-clip:text;font-size:clamp(2rem,5vw,3rem);font-weight:800;margin-bottom:2rem;text-align:center}.section-card{animation:fadeInUp .6s ease-out .1s backwards;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:var(--card-bg);border:1px solid var(--border);border-radius:20px;color:var(--text-primary);margin-bottom:2rem;padding:2rem;transition:all .3s ease}.section-card:hover{border-color:var(--accent)}.section-header{border-bottom:2px solid var(--border);color:var(--text-primary);font-size:1.5rem;font-weight:700;margin-bottom:1.5rem;padding-bottom:.75rem}.inputs-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));margin-bottom:1.5rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-label{color:var(--text-secondary);font-size:.875rem;font-weight:600}.input-value{color:var(--accent);font-size:1.125rem;font-weight:700}.text-input{background:var(--bg-secondary);border:2px solid var(--border);border-radius:12px;color:var(--text-primary);font-family:inherit;font-size:1rem;padding:.75rem 1rem;transition:all .3s ease}.text-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #667eea1a;outline:none}.range-input{-webkit-appearance:none;background:var(--border);border-radius:3px;cursor:pointer;height:6px;outline:none;width:100%}.range-input::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;background:linear-gradient(135deg,var(--accent) 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#fff3;color:#ffffffe6;font-size:.875rem;font-weight:600;margin-top:1rem;padding-top:1rem}.chart-card{animation:fadeInUp .6s ease-out .3s backwards;background:var(--card-bg);border:1px solid var(--border);border-radius:16px;padding:1.5rem}.chart-card,.chart-title{color:var(--text-primary)}.chart-title{font-size:1.125rem;font-weight:600;margin-bottom:1rem}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.calculator-title{font-size:1.75rem}.section-card{padding:1.5rem}.inputs-grid,.results-grid{grid-template-columns:1fr}.result-value{font-size:1.5rem}}
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