body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #1e1e2f;
    color: #ffffff;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 700px;
    margin: 50px auto;
    background: #2a2a3c;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
h1, h2 {
    text-align: center;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 12px;
    text-align: left;
}
.up {
    color: #00ff99;
}
.down {
    color: #ff5555;
}
input[type="text"], input[type="password"] {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 8px;
    border: none;
}
button {
    background: #3b82f6;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
}
.logout {
    display: block;
    margin-top: 30px;
    text-align: center;
    color: #ff5555;
}