body{
    margin:0;
    font-family:Arial, sans-serif;
    background:#0d0d0d;
    color:white;
}
.nav{
    background:#161616;
    padding:15px;
    text-align:center;
}
.nav a{
    color:white;
    text-decoration:none;
    margin:0 12px;
    font-weight:bold;
}
.nav a:hover{
    color:#39a96b;
}
.container{
    width:90%;
    max-width:1000px;
    margin:40px auto;
}
.box{
    background:#1a1a1a;
    padding:25px;
    border-radius:12px;
    box-shadow:0 0 12px rgba(0,0,0,0.3);
    margin-bottom:25px;
}
input, select, button{
    width:100%;
    padding:12px;
    margin-top:10px;
    box-sizing:border-box;
    border:none;
    border-radius:8px;
}
button{
    background:#2f8f5b;
    color:white;
    font-weight:bold;
    cursor:pointer;
}
button:hover{
    background:#26754a;
}
h1,h2,h3{
    margin-top:0;
}
.msg{
    margin-top:15px;
    color:#ffd166;
}
.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
}
.card{
    background:#1a1a1a;
    padding:20px;
    border-radius:12px;
}
table{
    width:100%;
    border-collapse:collapse;
    margin-top:15px;
}
th, td{
    padding:10px;
    border-bottom:1px solid #333;
    text-align:left;
}
.hero{
    text-align:center;
    padding:50px 20px;
    background:linear-gradient(180deg,#121212,#0b0b0b);
    border-radius:12px;
}
.hero h1{
    font-size:42px;
}
.hero p{
    color:#ccc;
}
.footer{
    text-align:center;
    padding:20px;
    color:#888;
}