:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;color:#213547;background-color:#f8fafc;--primary: #4f46e5;--card-bg: #ffffff}body{margin:0;padding:0}.navbar{display:flex;justify-content:space-between;align-items:center;padding:1rem 5%;background:#fff;box-shadow:0 1px 3px #0000001a;position:sticky;top:0;z-index:10}.logo{font-weight:800;font-size:1.2rem;color:var(--primary)}.nav-links a{margin-left:20px;text-decoration:none;color:#555;font-weight:500}.nav-links a:hover{color:var(--primary)}.hero{text-align:center;padding:4rem 1rem;background:#fff;border-bottom:1px solid #eee}.hero h1{margin-bottom:.5rem;font-size:2.5rem;color:#1e293b}.hero button{margin-top:1rem;padding:.8rem 1.5rem;background:var(--primary);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:1rem}.hero button:hover{background:#4338ca}.ad-container{padding:20px;text-align:center}.ad-box{width:100%;max-width:728px;height:90px;background:#e2e8f0;margin:0 auto;display:flex;align-items:center;justify-content:center;color:#94a3b8;border:1px dashed #cbd5e1}.container{max-width:1000px;margin:0 auto;padding:20px}.section-title{border-left:4px solid var(--primary);padding-left:10px;margin-top:40px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:20px}.card{background:var(--card-bg);padding:20px;border-radius:8px;text-decoration:none;color:inherit;box-shadow:0 1px 3px #0000001a;transition:transform .2s;border:1px solid transparent;display:block}.card:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:0 10px 15px -3px #0000001a}.icon{font-size:2rem;margin-bottom:10px}.card h3{margin:0 0 5px}.card p{margin:0;color:#64748b;font-size:.9rem}footer{text-align:center;padding:2rem;color:#888;font-size:.8rem;margin-top:50px}.tool-wrapper{max-width:600px;margin:0 auto;text-align:center}.calculator-box{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 15px #0000000d;margin-top:20px;border:1px solid #e2e8f0;text-align:left}.input-group{margin-bottom:20px}.input-group label{display:block;font-weight:600;margin-bottom:8px;color:#334155}.input-group input{width:100%;padding:12px;border:1px solid #cbd5e1;border-radius:6px;font-size:1rem;box-sizing:border-box}.primary-btn{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:6px;font-size:1.1rem;font-weight:700;cursor:pointer}.primary-btn:hover{background:#4338ca}.hidden{display:none}.result-box{margin-top:25px;padding-top:20px;border-top:2px dashed #e2e8f0}.result-row{display:flex;justify-content:space-between;margin-bottom:10px;font-size:1.1rem;color:#64748b}.result-row.total{font-weight:700;color:#1e293b;font-size:1.4rem;margin-top:15px}.save-text{color:#16a34a}.seo-content{max-width:700px;margin:60px auto 20px;background:#fff;padding:30px;border-radius:8px;border:1px solid #e2e8f0}.seo-content code{display:block;background:#f1f5f9;padding:15px;border-radius:6px;font-family:monospace;margin:15px 0}.editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;height:500px}.editor-col{display:flex;flex-direction:column}textarea{width:100%;height:100%;padding:15px;background:#1e293b;color:#a5f3fc;font-family:Courier New,monospace;border-radius:6px;border:1px solid #334155;resize:none;font-size:.9rem}.status-msg{margin-top:10px;font-weight:700;color:#64748b}@media(max-width:768px){.editor-grid{grid-template-columns:1fr;height:600px}}