body {
    font-family: 'Vazirmatn', sans-serif; /* یک فونت فارسی زیبا */
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #f0f2f5;
    color: #333;
}

.container {
    width: 80%;
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar */
.navbar {
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    padding: 10px 0;
    width: 100%;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
}

.navbar nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar nav ul li {
    display: inline-block;
    margin-right: 20px;
}

.navbar nav a {
    text-decoration: none;
    color: #555;
    font-weight: bold;
    transition: color 0.3s;
}

.navbar nav a:hover {
    color: #007bff;
}

/* Main Content */
main {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.upload-container, .message-box, .content-box {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 500px;
}

input[type="file"] {
    margin: 20px 0;
    border: 2px dashed #ddd;
    padding: 20px;
    border-radius: 5px;
    width: 90%;
}

input[type="submit"], .button-back {
    background-color: #28a745;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    text-decoration: none;
    display: inline-block;
}

input[type="submit"]:hover, .button-back:hover {
    background-color: #218838;
}

.message-box a {
    color: #007bff;
}

/* Footer */
.footer {
    background-color: #343a40;
    color: #f8f9fa;
    padding: 20px 0;
    width: 100%;
    text-align: center;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    color: #f8f9fa;
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}