/* Import Google Fonts for a modern look */
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;600&display=swap');

/*--- Base Styles ---*/
:root {
    --facebook-blue: #1877F2;
    --facebook-light-blue: #E7F3FF;
    --card-bg-color: #ffffff;
    --body-bg-color: #f0f2f5;
    --text-color: #1c1e21;
    --border-color: #dddfe2;
    --success-color: #28a745;
    --error-color: #dc3545;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* Slightly softer shadow */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Kanit', sans-serif;
    background-color: var(--body-bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px; /* Changed padding for responsiveness */
}

/*--- Header & Navigation ---*/
header {
    background-color: var(--card-bg-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on small screens */
    margin-bottom: 25px;
}

header h1 {
    font-size: 24px;
    color: var(--facebook-blue);
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 15px; /* Adjusted gap */
}

header nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    padding: 8px 12px;
    transition: background-color 0.3s ease, color 0.3s ease;
    border-radius: 6px;
}

header nav a:hover {
    background-color: var(--facebook-light-blue);
    color: var(--facebook-blue);
}

/*--- Main Content & Cards ---*/
main {
    background-color: var(--card-bg-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 30px;
}

h2 {
    color: var(--facebook-blue);
    margin-bottom: 20px;
    font-weight: 600;
}

/*--- Forms & Inputs ---*/
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 400;
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="password"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: 'Kanit', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Accessibility: Added focus styles for inputs */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--facebook-blue);
    box-shadow: 0 0 0 3px var(--facebook-light-blue);
}

textarea {
    min-height: 100px;
    resize: vertical;
}

/*--- Buttons ---*/
.btn {
    background-color: var(--facebook-blue);
    color: #fff;
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #166fe5;
    transform: translateY(-2px); /* Add a subtle lift effect */
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--facebook-light-blue);
}

/*--- Dashboard Cards ---*/
.summary-cards {
    display: grid; /* Use grid for better alignment */
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.card h3 {
    color: var(--text-color);
    margin-bottom: 10px;
    font-size: 1rem;
    font-weight: 400;
}

.card .value {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--facebook-blue);
}


/*--- Reports Table ---*/
.table-container {
    overflow-x: auto; /* Allow horizontal scrolling on small screens */
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

thead th {
    background-color: var(--facebook-light-blue);
    font-weight: 600;
    color: var(--facebook-blue);
    border-top: 1px solid var(--border-color);
}

tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

tbody tr:hover {
    background-color: var(--facebook-light-blue);
}


/*--- Login & Authentication Page ---*/
.auth-container {
    max-width: 420px;
    margin: 80px auto;
    padding: 30px;
    background-color: var(--card-bg-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 25px;
}

.auth-container .form-group {
    text-align: left;
}

.auth-container .btn {
    width: 100%;
    margin-top: 10px;
}

/*--- Utility & Message Classes ---*/
.hidden {
    display: none !important;
}

.success-message, .error-message {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: .25rem;
}

.success-message {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.error-message {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}


/*--- Responsive Design ---*/
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }

    header nav ul {
        flex-direction: column;
        width: 100%;
        text-align: center;
        gap: 10px;
    }

    main, .auth-container {
        padding: 20px;
    }
}