/* === Global Styles & Fonts === */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --font-family: 'Kanit', sans-serif;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

body {
    font-family: var(--font-family);
    background-color: #f4f7f6;
    color: var(--dark-color);
    margin: 0;
    font-weight: 300;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    margin-top: 0;
}

hr {
    border: 0;
    border-top: 1px solid #dee2e6;
    margin: 2rem 0;
}

/* === Header & Navigation === */
.admin-header {
    background-color: var(--dark-color);
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.admin-header h1 { font-size: 1.5rem; margin: 0; }
.user-info { display: flex; align-items: center; gap: 1rem; }

.admin-nav {
    background-color: #fff;
    padding: 0.75rem 2rem;
    border-bottom: 1px solid #dee2e6;
}
.admin-nav a {
    color: var(--secondary-color);
    text-decoration: none;
    margin-right: 1.5rem;
    font-weight: 400;
    transition: color 0.2s ease-in-out;
}
.admin-nav a:hover { color: var(--primary-color); }

/* === Buttons === */
.btn-submit, .btn-cancel, .btn-edit, .btn-delete, .btn-activate, .btn-logout {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: #fff;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: opacity 0.2s ease-in-out;
}
.btn-submit { background-color: var(--primary-color); }
.btn-cancel, .btn-delete { background-color: var(--secondary-color); }
.btn-edit { background-color: var(--warning-color); color: var(--dark-color); }
.btn-activate { background-color: var(--success-color); }
.btn-logout { background-color: var(--danger-color); }
.btn-submit:hover, .btn-cancel:hover, .btn-edit:hover, .btn-delete:hover, .btn-activate:hover, .btn-logout:hover {
    opacity: 0.85;
}

/* === Forms === */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 400; }
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}
.form-group small { color: var(--secondary-color); margin-top: 0.25rem; display: block; }
.info-text, input.info-text {
    display: inline-block;
    padding: 0.6rem 0.8rem;
    background-color: var(--light-color);
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    font-weight: 500;
    color: var(--primary-color);
}
input[readonly].info-text { background-color: #e9ecef; cursor: not-allowed; }

/* === Tables === */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    background-color: #fff;
}
th, td {
    padding: 0.9rem 1rem;
    border: 1px solid #dee2e6;
    text-align: left;
    vertical-align: middle;
}
th { background-color: var(--light-color); font-weight: 500; }
tbody tr:nth-child(odd) { background-color: #fff; }
tbody tr:nth-child(even) { background-color: var(--light-color); }
td > strong { font-weight: 500; }
.status.active { color: var(--success-color); font-weight: 500; }
.status.inactive { color: var(--danger-color); }
td a { margin-right: 0.25rem; }

/* === Specific Layouts === */
.login-container { max-width: 400px; }
.price-settings-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; }
.price-box { border: 1px solid #dee2e6; padding: 1.5rem; border-radius: var(--border-radius); }
.dashboard-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.card { background-color: var(--light-color); padding: 1.5rem; border-radius: 8px; text-align: center; }
.card .big-number { font-size: 2.5rem; font-weight: bold; color: var(--primary-color); margin: 0.5rem 0 0 0; }

/* css/style.css (เพิ่มต่อท้าย) */

.invoice-copy-area {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.invoice-text {
    flex-grow: 1;
    font-family: monospace; /* ใช้ฟอนต์ที่ความกว้างเท่ากันเพื่อง่ายต่อการอ่าน */
    background-color: #e9ecef;
    border: 1px solid #ced4da;
    padding: 0.5rem;
    font-size: 0.9rem;
}

.btn-copy {
    padding: 0.5rem 0.8rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    white-space: nowrap; /* ไม่ให้ปุ่มตัดคำ */
}

.card small {
    display: block;
    margin-top: 0.5rem;
    color: var(--secondary-color);
}

/* เพิ่ม icon (ถ้าต้องการ) */
@import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css");
h3 i { margin-right: 0.5rem; }

/* แก้ไขโดยการเพิ่ม font-weight เข้าไป */
.message.error {
    background-color: #f8d7da;
    color: #721c24;
    font-weight: bold; /* <-- เพิ่มบรรทัดนี้ */
}

/* css/style.css (เพิ่มต่อท้าย) */

.form-container-narrow {
    max-width: 550px; /* กำหนดความกว้างสูงสุด */
    margin: 2rem auto; /* ตั้งค่า margin ให้อยู่ตรงกลางแนวนอน */
    padding: 2rem;
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    background-color: #fff;
}

/* css/style.css (เพิ่มต่อท้าย) */
.badge {
    display: inline-block;
    padding: .35em .65em;
    font-size: .75em;
    font-weight: 700;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: .25rem;
}
.badge-success { background-color: var(--success-color); }
.badge-warning { background-color: var(--warning-color); color: var(--dark-color); }
.badge-danger { background-color: var(--danger-color); }
.badge-secondary { background-color: var(--secondary-color); }