body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: url('https://pic1.imgdb.cn/item/6762d200d0e0a243d4e6287d.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
}

.container {
    background: rgba(0, 0, 0, 0.6);
    max-width: 700px;
    margin: 80px auto;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

h1, h2 {
    text-align: center;
    margin-bottom: 20px;
}

.upload-form {
    text-align: center;
    margin-bottom: 20px;
}

.upload-form input[type="file"] {
    margin-right: 10px;
}

.upload-form button {
    background: #00b4d8;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: 0.3s;
}

.upload-form button:hover {
    background: #0096c7;
}

.file-list ul {
    list-style: none;
    padding: 0;
}

.file-list li {
    background: rgba(255, 255, 255, 0.1);
    margin: 10px 0;
    padding: 10px 15px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-list a {
    color: #90e0ef;
    text-decoration: none;
}

.file-list a:hover {
    text-decoration: underline;
}

.delete-btn {
    color: #ff6b6b;
    margin-left: 15px;
    font-size: 0.9em;
}