body{font-family:Arial,Helvetica,sans-serif;margin:0;background:#0f172a;color:#111}
.container{max-width:1200px;margin:auto;padding:30px}
.header{background:#111827;color:white}
.nav{display:flex;justify-content:space-between;align-items:center}
nav a{color:white;margin-left:18px;text-decoration:none;font-weight:bold}
.hero{background:white;padding:70px;border-radius:14px;margin-top:30px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:30px}
.card{background:white;padding:25px;border-radius:14px;box-shadow:0 10px 18px rgba(0,0,0,0.1)}
.button{display:inline-block;padding:12px 16px;background:#2563eb;color:white;border-radius:8px;text-decoration:none;margin-top:10px}
.tool{background:white;border-radius:14px}
input{width:100%;padding:12px;margin-bottom:15px;border-radius:8px;border:1px solid #ddd}
button{padding:12px;background:#2563eb;color:white;border:none;border-radius:8px;font-weight:bold;cursor:pointer}
footer{text-align:center;color:white;padding:30px;margin-top:40px}
.article{background:white;padding:30px;border-radius:12px;margin-bottom:20px}