body {
    background-color: #1a1a1a;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.card {
    background-color: #2b2b2b;
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}
.card-header {
    background-color: #333;
    border-radius: 15px 15px 0 0 !important;
    font-weight: bold;
    border-bottom: 1px solid #444;
}
.form-control, .form-control:focus {
    background-color: #3a3a3a;
    border: 1px solid #555;
    color: #fff;
}
.form-control::placeholder {
    color: #aaa;
}
.btn-success {
    background-color: #2e7d32;
    border: none;
}
.btn-success:hover {
    background-color: #1b5e20;
}
.btn-danger {
    background-color: #c62828;
    border: none;
}
.btn-danger:hover {
    background-color: #8e0000;
}
#log {
    background-color: #111;
    color: #0f0;
    font-family: 'Courier New', monospace;
    height: 300px;
    overflow-y: scroll;
    padding: 10px;
    border-radius: 5px;
    font-size: 12px;
}
.link-icon {
    cursor: pointer;
    color: #00d4ff;
    text-decoration: underline;
}