body {
    font-family: Arial;
    background: #f5f5f5;
}

.box {
    max-width: 600px;
    margin: 40px auto;
    padding: 25px;
    background: white;
    border-radius: 10px;
}

.box.wide {
    max-width: 900px;
}

input, textarea, select {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
}

button, .btn {
    padding: 10px 14px;
    border: none;
    background: #0071e3;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    cursor: pointer;
}

.btn.small { padding: 5px 10px; }
.red { background: #c0392b; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
table td, table th { padding: 10px; border: 1px solid #ccc; }
.error { background: #ffebe8; padding: 10px; color: #c00; }