* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 30px;
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    color: #222;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    margin-top: 0;
    margin-bottom: 24px;
}

h2 {
    margin-top: 0;
    margin-bottom: 18px;
}

.card {
    background: #fff;
    padding: 24px;
    margin-bottom: 24px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.field {
    margin-bottom: 18px;
}

.field label {
    display: block;
    margin-bottom: 7px;
    font-size: 14px;
    font-weight: 600;
}

input[type="text"],
input[type="number"],
input[type="file"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d0d5dd;
    border-radius: 6px;
    background: #fff;
    font-size: 14px;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="file"]:focus {
    outline: none;
    border-color: #666;
}

input[type="checkbox"] {
    margin-right: 6px;
}

button,
.btn {
    display: inline-block;
    padding: 9px 15px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary,
.btn-save {
    background: #222;
    color: #fff;
}

.btn-primary:hover,
.btn-save:hover {
    background: #000;
}

.btn-edit,
.btn-back {
    background: #e9ecef;
    color: #222;
}

.btn-edit:hover,
.btn-back:hover {
    background: #dde1e5;
}

.btn-delete {
    background: #dc3545;
    color: #fff;
}

.btn-delete:hover {
    background: #bb2d3b;
}

.message {
    padding: 12px 14px;
    margin-bottom: 20px;
    border: 1px solid #badbcc;
    border-radius: 6px;
    background: #e9f7ef;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

th,
td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: center;
    vertical-align: middle;
}

th {
    background: #f8f9fa;
    font-weight: 600;
}

tr:hover {
    background: #fafafa;
}

.banner-image {
    width: 160px;
    max-height: 90px;
    object-fit: contain;
    border-radius: 4px;
}

.visible-yes {
    color: #198754;
    font-weight: 600;
}

.visible-no {
    color: #999;
}

.actions {
    white-space: nowrap;
}

.actions form {
    display: inline-block;
    margin-left: 4px;
}

small {
    display: block;
    margin-top: 6px;
    color: #777;
}

a {
    word-break: break-all;
}

@media (max-width: 900px) {
    body {
        padding: 15px;
    }

    .card {
        padding: 16px;
    }

    table {
        font-size: 13px;
    }

    th,
    td {
        padding: 8px;
    }

    .banner-image {
        width: 110px;
        max-height: 70px;
    }
}