body{
font-family: Arial, sans-serif;
background:#0f172a;
color:white;
margin:0;
}

.header{
background:#111827;
padding:15px;
font-size:22px;
font-weight:bold;
}

.container{
padding:30px;
}

.card{
background:#1e293b;
padding:20px;
border-radius:10px;
margin-bottom:20px;
box-shadow:0 4px 10px rgba(0,0,0,0.4);
}

button{
background:#22c55e;
border:none;
padding:10px 15px;
color:white;
border-radius:6px;
cursor:pointer;
}

button:hover{
background:#16a34a;
}

input{
padding:8px;
border-radius:5px;
border:none;
margin-right:10px;
}

table{
width:100%;
border-collapse:collapse;
margin-top:10px;
}

th,td{
padding:10px;
border-bottom:1px solid #334155;
text-align:center;
}

th{
background:#334155;
}

.nav a{
color:#38bdf8;
margin-right:15px;
text-decoration:none;
font-weight:bold;
}

.nav a:hover{
text-decoration:underline;
}