/* Reset default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
    padding: 20px;
}

header {
    background-color: #2c3e50;
    color: #fff;
    padding: 20px;
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    margin-bottom: 10px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

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

section {
    background-color: #fff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.flash-messages {
    list-style: none;
    background-color: #e74c3c;
    color: #fff;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.flash-messages li {
    margin-bottom: 5px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input[type="file"] {
    padding: 5px;
}

button {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #2980b9;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

th {
    background-color: #2c3e50;
    color: #fff;
}

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

a {
    color: #3498db;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #2c3e50;
    color: #fff;
    margin-top: 20px;
    border-radius: 5px;
}