* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: transparent;
}

.upload-box {
    width: 100%;
    min-height: 100vh;
    background: white;
    padding: 16px;
    display: flex;
    flex-direction: column;
}

h2 {
    margin-bottom: 20px;
    color: #333;
}

.drop-area {
    border: 2px dashed #ccc;
    border-radius: 4px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.drop-area:hover {
    border-color: #666;
    background: #f9f9f9;
}

.drop-area.dragover {
    border-color: #0066cc;
    background: #e6f2ff;
}

.drop-area p + p {
    font-size: 14px;
    color: #666;
    margin-top: 10px;
}

input[type="file"] {
    display: none;
}

.file-list {
    margin-top: 20px;
    display: none;
}

.file-list.show {
    display: block;
}

.file-item {
    padding: 10px;
    background: #f9f9f9;
    margin-bottom: 5px;
    border-radius: 4px;
}

button {
    margin-top: 20px;
    padding: 12px 24px;
    background: #0066cc;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
}

button:hover {
    background: #0052a3;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.todo {
    margin-top: 20px;
    padding: 10px;
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 4px;
    font-size: 14px;
    color: #856404;
}

footer {
    margin-top: auto;
    text-align: right;
    font-size: 12px;
    color: #888;
}

footer a {
    color: #666;
    text-decoration: none;
}

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