body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.main-container {
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    padding: 32px;
    margin-top: 40px;
}

.title {
    color: #4c51bf;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 24px;
}

.upload-area {
    border: 2px dashed #6366f1;
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    background: #f9fafb;
    transition: all 0.2s ease;
    cursor: pointer;
}

.upload-area:hover {
    background: #eef2ff;
    border-color: #4f46e5;
}

.upload-area.dragover {
    background: #e0f2fe;
    border-color: #0ea5e9;
}

.file-input {
    display: none;
}

.file-name {
    margin-top: 12px;
    color: #16a34a;
    font-weight: 600;
    word-break: break-all;
}

.btn-run {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border: none;
    padding: 10px 32px;
    font-size: 16px;
    border-radius: 999px;
    color: #ffffff;
    font-weight: 600;
}

.btn-run:hover {
    filter: brightness(1.05);
    color: #ffffff;
}

.btn-run:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.progress-container,
.result-container,
.error-container {
    display: none;
    margin-top: 20px;
}

.download-btn {
    margin: 4px;
}

.user-info-placeholder {
    text-align: right;
    color: #9ca3af;
    font-size: 13px;
}

.config-panel {
    display: none;
    margin-top: 24px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
    border: 1px solid #dee2e6;
}

.config-panel.show {
    display: block;
}

.config-section {
    margin-bottom: 24px;
    padding: 16px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.config-section-title {
    font-weight: 600;
    color: #495057;
    margin-bottom: 12px;
    font-size: 16px;
}

.config-section-desc {
    font-size: 13px;
    color: #6c757d;
    margin-bottom: 12px;
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 4px;
}

.btn-remove {
    color: #dc3545;
    border-color: #dc3545;
}

.btn-remove:hover {
    background-color: #dc3545;
    color: white;
}