:root {
    --primary-blue: #0056b3;
    --light-blue: #e6f0fa;
    --white: #ffffff;
    --gray-bg: #f4f6f9;
    --text-dark: #333333;
    --border-color: #cccccc;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-bg);
    color: var(--text-dark);
    margin: 0;
}

.header {
    background-color: var(--white);
    padding: 15px 30px;
    border-bottom: 3px solid var(--primary-blue);
    display: flex;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.header img {
    height: 50px;
    margin-right: 20px;
}

.navbar {
    margin-left: auto;
}

.navbar a {
    text-decoration: none;
    color: var(--text-dark);
    padding: 10px 15px;
    margin: 0 5px;
    border-radius: 4px;
    background-color: var(--light-blue);
    transition: 0.3s;
    font-weight: 500;
}

.navbar a:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid var(--border-color);
}

th, td {
    padding: 12px;
    text-align: left;
}

th {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn {
    padding: 8px 15px;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-danger {
    background-color: #dc3545;
}

/* ตั้งค่าสำหรับการพิมพ์ (Print) */
@media print {
    .header, .navbar, .no-print {
        display: none !important;
    }
    .container {
        box-shadow: none;
        margin: 0;
        width: 100%;
    }
    body {
        background-color: var(--white);
    }
}

.text-danger { color: #dc3545; font-weight: bold; } /* สีแดงสำหรับยาหมดอายุ */
.text-warning { color: #ff9800; font-weight: bold; } /* สีส้มสำหรับยาใกล้หมดอายุ */

/* สำหรับหน้า Login */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
}

.login-container img {
    height: 80px;
    margin-bottom: 15px;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 14px;
}

.login-container input:focus {
    border-color: var(--primary-blue);
    outline: none;
}

.login-container .btn {
    width: 100%;
    margin-top: 15px;
    font-size: 16px;
    padding: 12px;
}

.alert {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 14px;
}