body {
    margin: 0;
    padding: 0;
    background: #f5f7fa;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
    margin-bottom: 20px;
}

.btn {
    padding: 10px 15px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.btn-danger { background: #dc3545; }
.btn-success { background: #28a745; }
.btn-warning { background: #ffc107; color: #000; }

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    width: 95%;
    max-width: 1100px;
    margin: auto;
}

.card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}