/* ตัวอย่าง style.css */
body {
    font-family: 'Sarabun', Arial, sans-serif;
    background: #f8fafc;
    color: #22303c;
}
.navbar {
    background: linear-gradient(120deg, #1e3a8a 0%, #005c97 100%);
    color: #fff;
}
a, a:visited { color: #2563eb; }
.btn-primary {
    background: #2563eb;
    border: none;
    border-radius: 8px;
}
input, select, textarea {
    border-radius: 0.5rem !important;
}
@media (max-width: 600px) {
    .sidebar { display: none; }
    .mobile-nav { display: block; }
}
.flash-message {
    margin-top: 1rem;
}
.card {
    border-radius: 1.25rem;
    box-shadow: 0 2px 12px rgba(60,80,150,0.09);
}