body {
    margin: 0;
    font-family: 'Web UI Sans', system-ui, sans-serif;
    background: #f9fafb;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.app {
    width: 100%;
    max-width: 320px;
    padding: 1.5rem;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    text-align: center;
}

h1 {
    margin-bottom: 1rem;
}

input[type="file"] {
    font-family: 'Web UI Sans', system-ui, sans-serif;
    width: 100%;
    margin-bottom: 0.75rem;
}

button {
    font-family: 'Web UI Sans', system-ui, sans-serif;
    width: 100%;
    padding: 0.6rem;
    border: none;
    border-radius: 6px;
    background: #111827;
    color: #fff;
    cursor: pointer;
    font-size: 0.85rem;
}

.status {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: #6b7280;
}

.error {
    color: #dc2626;
}

.success {
    color: #16a34a;
}