body {
    font-family: Arial, sans-serif;
    background: #0f1115;
    color: #eaeaea;
    margin: 0;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: auto;
}

nav {
    background: #151823;
    padding: 15px;
}

nav a {
    color: #9aa4ff;
    margin-right: 15px;
    text-decoration: none;
}

.card {
    background: #1b1f2e;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

button {
    background: #5865f2;
    border: none;
    padding: 12px 20px;
    color: white;
    border-radius: 6px;
    cursor: pointer;
}

button.secondary {
    background: #2c2f44;
}

select, input {
    padding: 10px;
    width: 100%;
    margin-top: 5px;
    background: #0f1115;
    color: white;
    border: 1px solid #333;
    border-radius: 5px;
}

.loader {
    border: 4px solid #333;
    border-top: 4px solid #5865f2;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 30px auto;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}