body.dark {
    background-color: #1e1e1e;
    color: #fff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background: #2e2e2e;
    padding: 20px;
    border-radius: 8px;
}

input, button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 10px;
    border: none;
    border-radius: 5px;
}

button {
    background: #4caf50;
    color: white;
    cursor: pointer;
}

.error {
    color: #ff4d4d;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logout-btn {
    background: #ff4d4d;
    padding: 10px;
    border: none;
    border-radius: 5px;
    color: white;
    text-decoration: none;
}

.upload-section, .file-list {
    margin: 20px;
    background: #2e2e2e;
    padding: 20px;
    border-radius: 8px;
}

.upload-box {
    border: 2px dashed #4caf50;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 10px;
}

.upload-btn {
    background: #4caf50;
    color: white;
    padding: 10px;
    border: none;
    width: 100%;
    border-radius: 5px;
    margin-top: 10px;
}

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

thead {
    background: #3e3e3e;
}

th, td {
    padding: 10px;
    text-align: left;
}

tr:nth-child(even) {
    background: #2c2c2c;
}