body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #0f172a;
    color: #f8fafc;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
header { 
    text-align: center; 
    margin-bottom: 30px; 
}
h1 { 
    color: #38bdf8; 
}
main { 
    width: 100%; 
    max-width: 600px; 
}
.metrics { 
    display: flex; 
    gap: 15px; 
    margin-bottom: 30px; 
    justify-content: space-between; 
}
.card { 
    background: #1e293b; 
    padding: 15px; 
    border-radius: 8px; 
    border: 1px solid #334155; 
    flex: 1; 
    text-align: center; 
}
form { 
    background: #1e293b; 
    padding: 25px; 
    border-radius: 8px; 
    display: flex; 
    flex-direction: column; 
    gap: 15px; 
}
input, textarea { 
    padding: 10px; 
    border-radius: 4px; 
    border: 1px solid #475569; 
    background: #0f172a; 
    color: white; 
}
button { 
    background: #38bdf8; 
    color: #0f172a; 
    font-weight: bold; 
    padding: 12px; 
    border: none; 
    border-radius: 4px; 
    cursor: pointer; 
}
button:hover { 
    background: #0ea5e9; 
}