/* Theme: Modern & Clean Admin Panel
    Colors: Facebook Blue #1877F2, Light Gray #f0f2f5, Dark Gray #333
*/

/* Reset CSS */
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, form, fieldset, legend, button {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5; /* Light Gray */
    line-height: 1.6;
    color: #333; /* Dark Gray */
}

/* Typography */
h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1877F2; /* Facebook Blue */
    text-align: center;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1877F2; /* Facebook Blue */
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

a {
    color: #1877F2; /* Facebook Blue */
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Navigation */
.navbar {
    background-color: #1877F2; /* Facebook Blue */
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.navbar nav ul {
    list-style: none;
    display: flex;
    justify-content: flex-end;
}

.navbar nav ul li {
    margin-left: 1rem;
}

.navbar nav ul li a {
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    transition: background-color 0.2s;
}

.navbar nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Tabs */
.tabs {
    display: flex;
    background-color: #f0f2f5; /* Light Gray */
    border-bottom: 1px solid #ddd;
}

.tabs button {
    background-color: transparent;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    color: #333; /* Dark Gray */
    transition: background-color 0.2s, color 0.2s;
}

.tabs button:hover {
    background-color: #ddd;
}

.tabs button.active {
    background-color: #1877F2; /* Facebook Blue */
    color: white;
}

.tabcontent {
    display: none;
    padding: 2rem;
}

/* Forms */
form {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 0.25rem;
    margin-bottom: 1rem;
    font-size: 1rem;
}

input[type="file"] {
    margin-bottom: 1rem;
}

button {
    background-color: #1877F2; /* Facebook Blue */
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #155EAA;
}

.error {
    color: red;
    margin-bottom: 1rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f0f2f5; /* Light Gray */
    font-weight: bold;
}

tr:hover {
    background-color: #f9f9f9;
}

/* Cards */
.card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

/* ... (Thêm các kiểu dáng khác nếu cần) */