:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #ec4899;--accent-color: #8b5cf6;--bg-color: #f8fafc;--bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);--text-main: #1e293b;--text-muted: #64748b;--text-light: #94a3b8;--card-bg: rgba(255, 255, 255, .9);--card-border: rgba(255, 255, 255, .5);--card-shadow: 0 10px 30px -5px rgba(0, 0, 0, .05), 0 4px 10px -3px rgba(0, 0, 0, .02);--card-hover-shadow: 0 20px 40px -5px rgba(0, 0, 0, .1), 0 8px 15px -5px rgba(0, 0, 0, .04);--input-bg: #ffffff;--input-border: #e2e8f0;--input-focus-ring: rgba(79, 70, 229, .2);--radius-sm: .5rem;--radius-md: 1rem;--radius-lg: 1.5rem;--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;font-family:var(--font-sans);line-height:1.6;font-weight:400;color-scheme:light;color:var(--text-main);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg-gradient);background-attachment:fixed}h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;letter-spacing:-.025em;color:var(--text-main)}button{border-radius:var(--radius-sm);border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:600;font-family:inherit;background-color:var(--primary-color);color:#fff;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 6px -1px #4f46e533}button:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 10px -1px #4f46e54d}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}.app-container{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem;width:100%;box-sizing:border-box}.main-header{background:#fffc;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:2rem 0;border-bottom:1px solid var(--card-border);text-align:center;margin-bottom:3rem;position:sticky;top:0;z-index:10}.main-header h1{margin:0;font-size:2.5rem;background:linear-gradient(135deg,var(--primary-color) 0%,var(--accent-color) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.tagline{color:var(--text-muted);font-size:1.1rem;margin:0}.calculator-tabs{display:flex;gap:.5rem;margin-bottom:2rem;overflow-x:auto;padding-bottom:.5rem}.tab-button{padding:.75rem 1.5rem;border:none;background:var(--card-bg);color:var(--text-muted);font-size:.875rem;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;white-space:nowrap;border:1px solid var(--card-border);box-shadow:none}.tab-button:hover{background:#fff;color:var(--text-main);transform:translateY(0);box-shadow:0 2px 4px #0000000d}.tab-button.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color);box-shadow:0 4px 8px #4f46e54d}.tab-button.active:hover{background:var(--primary-hover);transform:translateY(-1px)}.calculator-display{max-width:600px;margin:0 auto;margin-bottom:4rem}.calculator-card{background:var(--card-bg);padding:2rem;border-radius:var(--radius-md);box-shadow:var(--card-shadow);border:1px solid var(--card-border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column}.calculator-card:hover{transform:translateY(-4px);box-shadow:var(--card-hover-shadow);border-color:#fffc}.calculator-card h3{margin-top:0;color:var(--text-main);font-size:1.25rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.description{font-size:.95rem;color:var(--text-muted);margin-bottom:1.5rem;line-height:1.5;min-height:3em}.input-group{margin-bottom:1.25rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:500;font-size:.9rem;color:var(--text-main)}.input-group input{width:100%;padding:.75rem 1rem;border:1px solid var(--input-border);border-radius:var(--radius-sm);font-size:1rem;background:var(--input-bg);color:var(--text-main);transition:all .2s ease;box-sizing:border-box}.input-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px var(--input-focus-ring)}.result-area{margin-top:auto;border-top:1px solid var(--input-border);display:flex;justify-content:space-between;align-items:center;background:linear-gradient(to right,rgba(248,250,252,.5),transparent);margin-left:-2rem;margin-right:-2rem;padding:1.5rem 2rem 2rem;margin-bottom:-2rem;border-radius:0 0 var(--radius-md) var(--radius-md)}.result-label{font-weight:600;color:var(--text-muted);font-size:.9rem;text-transform:uppercase;letter-spacing:.05em}.result-value{font-size:1.75rem;font-weight:800;color:var(--primary-color);font-variant-numeric:tabular-nums;letter-spacing:-.02em}.seo-content{background:var(--card-bg);padding:3rem;border-radius:var(--radius-md);margin-top:4rem;margin-bottom:4rem;border:1px solid var(--card-border);box-shadow:var(--card-shadow)}.seo-content h2{color:var(--text-main);font-size:1.8rem;margin-bottom:1.5rem}.seo-content h3{color:var(--text-main);margin-top:2rem;margin-bottom:1rem;font-size:1.4rem}.seo-content ul{padding-left:1.5rem;color:var(--text-muted)}.seo-content li{margin-bottom:.75rem}.seo-content p{color:var(--text-muted);line-height:1.7;margin-bottom:1.5rem}@media(max-width:640px){.main-header h1{font-size:2rem}.calculators-grid{grid-template-columns:1fr}.calculator-card{padding:1.5rem}.result-area{margin-left:-1.5rem;margin-right:-1.5rem;padding-left:1.5rem;padding-right:1.5rem;margin-bottom:-1.5rem;padding-bottom:1.5rem;flex-direction:column;align-items:flex-start;gap:.5rem}.result-value{align-self:flex-end}}