* { box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    background: #f5f7fa;
    color: #1f2937;
}
header {
    background: #0f3460;
    color: #fff;
    padding: 24px 32px;
}
header h1 { margin: 0 0 4px 0; font-size: 24px; }
header p { margin: 0; opacity: 0.85; }
main {
    max-width: 900px;
    margin: 24px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    padding: 20px 24px;
}
.toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
button {
    background: #0f3460;
    color: #fff;
    border: 0;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}
button:disabled { background: #9ca3af; cursor: not-allowed; }
button.danger { background: #b91c1c; }
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
}
th { background: #f9fafb; font-weight: 600; }
#status { color: #6b7280; font-size: 13px; }
input[type=file] { font-size: 14px; }
.uploadBox {
    border: 2px dashed #cbd5e1;
    padding: 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    background: #f9fafb;
}