body {
    background: #f4f4f4;
    color: #222;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
}
.container {
    max-width: 720px;
    margin: 20px auto;
    background: #fff;
    padding: 24px;
    border: 1px solid #ddd;
    border-radius: 4px;
}
h1, h2, h3 {
    margin-top: 0;
    color: #111;
}
p {
    color: #333;
    margin-top: 0;
}
nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid #ddd;
}
nav div {
    display: contents;
}
nav a {
    color: #0056b3;
    text-decoration: none;
    padding: 6px 10px;
    border: 1px solid #cbd5e1;
    border-radius: 3px;
    font-size: 0.9rem;
    background: #f8fafc;
}
nav a:hover {
    background: #e2e8f0;
}
.form-group {
    margin-bottom: 14px;
}
label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.95rem;
    color: #111;
}
input, select, textarea {
    width: 100%;
    padding: 8px;
    background: #fff;
    border: 1px solid #cbd5e1;
    color: #111;
    font-size: 0.95rem;
    border-radius: 3px;
    box-sizing: border-box;
}
textarea {
    resize: vertical;
}
.btn {
    background: #2563eb;
    color: #fff;
    border: 1px solid #1d4ed8;
    padding: 8px 18px;
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: 3px;
}
.btn:hover {
    background: #1d4ed8;
}
.status-msg {
    display: block;
    padding: 10px;
    margin-bottom: 14px;
    border-radius: 3px;
    text-align: center;
    font-size: 0.9rem;
}
.success {
    background: #ebf8f1;
    color: #047857;
    border: 1px solid #34d399;
}
.error {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fca5a5;
}
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
    margin-top: 16px;
}
.info-card {
    background: #fafafa;
    border: 1px solid #e5e7eb;
    padding: 16px;
    border-radius: 4px;
}
.ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-top: 8px;
}
.ref-table th {
    background: #f8fafc;
    padding: 8px;
    text-align: left;
    color: #111;
}
.ref-table td {
    padding: 8px;
    border-bottom: 1px solid #e5e7eb;
    color: #111;
}
.gridview {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}
.gridview th {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
    color: #111;
}
.gridview td {
    padding: 10px;
    border-bottom: 1px solid #e5e7eb;
    color: #111;
}
.total-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 10px 14px;
    margin: 14px 0;
    border-radius: 3px;
    font-size: 1rem;
}