*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:#f5f7fb;color:#1f2937;padding:1rem;font-size:16px;line-height:1.5}
.container{max-width:800px;margin:0 auto}
.card{background:#fff;border-radius:1rem;padding:1rem;margin-bottom:1rem;box-shadow:0 2px 8px rgba(0,0,0,0.05)}
.card h1,.card h2,.card h3{margin-bottom:0.5rem;font-weight:600}
.card h1{font-size:1.6rem}
.card h2{font-size:1.4rem}
.card h3{font-size:1.2rem}
.card p,.card li,.card div{font-size:1rem;color:#4b5563}
.btn{display:inline-block;background:#3b82f6;color:#fff;padding:0.5rem 1rem;border-radius:2rem;text-decoration:none;font-size:0.9rem;margin:0.5rem 0.5rem 0 0;border:none;cursor:pointer}
.btn:hover{background:#2563eb}
.btn-danger{background:#ef4444}
.btn-danger:hover{background:#dc2626}
.table-responsive{overflow-x:auto;margin:1rem 0}
table{width:100%;border-collapse:collapse;min-width:600px}
th,td{padding:12px;text-align:left;border-bottom:1px solid #e5e7eb}
th{background:#f1f5f9;font-weight:600}
input,select,textarea{width:100%;padding:0.5rem;border:1px solid #ccc;border-radius:0.5rem;font-size:1rem;margin:0.25rem 0}
label{font-weight:500;margin-top:0.5rem;display:block}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}
@media(max-width:768px){body{padding:0.8rem}.card h1{font-size:1.4rem}.card h2{font-size:1.2rem}.card h3{font-size:1rem}.card p{font-size:0.9rem}.btn{font-size:0.8rem;padding:0.4rem 0.8rem}}