:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg-color: #f8fafc;--card-bg: #ffffff;--text-main: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--radius: 12px;--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);line-height:1.5;-webkit-font-smoothing:antialiased}.container{max-width:800px;margin:0 auto;padding:2rem 1rem}h1,h2,h3{line-height:1.2;font-weight:700;margin-bottom:1rem}input,select,button{font:inherit;outline:none}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;border:1px solid var(--border-color)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:600;border:none;cursor:pointer;transition:all .2s}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.input-group{margin-bottom:1rem}.input-group label{display:block;font-size:.9rem;font-weight:500;margin-bottom:.5rem;color:var(--text-muted)}.input-group input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius);transition:border-color .2s}.input-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.result-box{background:#eff6ff;border:1px solid #bfdbfe;border-radius:var(--radius);padding:1rem;margin-top:1.5rem;text-align:center}.result-value{font-size:2rem;font-weight:800;color:var(--primary);display:block}.cta-button{background:#16a34a;color:#fff;width:100%;margin-top:1rem}.cta-button:hover{background:#15803d}.tabs{display:flex;gap:.5rem;margin-bottom:2rem;overflow-x:auto;padding-bottom:.5rem}.tab{padding:.5rem 1rem;border-radius:99px;background:#e2e8f0;color:var(--text-muted);border:none;cursor:pointer;white-space:nowrap;font-size:.9rem;font-weight:600}.tab.active{background:var(--primary);color:#fff}