body {
    font-family: -apple-system, Segoe UI, Roboto, sans-serif;
    background: #0f1117;
    color: #e6e6e6;
    margin: 0;
    padding: 40px 20px;
}
.container {
    max-width: 780px;
    margin: 0 auto;
}
h1 { font-size: 24px; margin-bottom: 4px; }
.subtitle { color: #9aa0ab; margin-bottom: 24px; }
.upload-form {
    display: flex;
    gap: 12px;
    padding: 20px;
    background: #1a1d27;
    border-radius: 10px;
    margin-bottom: 24px;
    align-items: center;
}
input[type="file"] { color: #e6e6e6; flex: 1; }
button {
    background: #4f6bfe;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}
button:hover { background: #3a54e0; }
.result { padding: 18px; border-radius: 10px; margin-bottom: 28px; }
.result-success { background: #123b23; border: 1px solid #1f6b3c; }
.result-error { background: #3b1212; border: 1px solid #6b1f1f; }
.result-table, .history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}
.result-table td, .history-table td, .history-table th {
    padding: 8px 10px;
    border-bottom: 1px solid #2a2e3a;
}
.history-table th { text-align: left; color: #9aa0ab; font-size: 13px; }
code { background: #2a2e3a; padding: 2px 6px; border-radius: 4px; font-size: 12px; }