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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card h2 {
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

.upload-section {
    display: grid;
    gap: 15px;
}

.upload-box {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.upload-box label {
    font-weight: 600;
    color: #555;
    min-width: 80px;
}

.upload-box input[type="file"] {
    flex: 1;
    min-width: 200px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #5568d3;
}

.btn-success {
    background: #48bb78;
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #38a169;
}

.btn-secondary {
    background: #718096;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #4a5568;
}

.btn-warning {
    background: #ed8936;
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: #dd6b20;
}

.recommend-tip {
    color: #718096;
    margin-bottom: 15px;
}

.btn-large {
    padding: 12px 30px;
    font-size: 16px;
}

.status {
    font-size: 14px;
    padding: 5px 10px;
    border-radius: 4px;
}

.status.success {
    color: #38a169;
    background: #f0fff4;
}

.status.error {
    color: #e53e3e;
    background: #fff5f5;
}

.project-selection {
    margin-top: 15px;
}

.project-list-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: #f7fafc;
    position: sticky;
    top: 0;
}

.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.data-table th {
    font-weight: 600;
    color: #4a5568;
}

.data-table tbody tr:hover {
    background: #f7fafc;
}

.empty-message {
    text-align: center;
    color: #a0aec0;
    padding: 40px !important;
}

.selection-info {
    margin-top: 15px;
    font-size: 16px;
    color: #4a5568;
    font-weight: 500;
}

.selection-info span {
    color: #667eea;
    font-size: 18px;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 20px;
}

.summary-box {
    background: #f7fafc;
    border-left: 4px solid #667eea;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.summary-box pre {
    font-family: inherit;
    white-space: pre-wrap;
    color: #2d3748;
    line-height: 1.6;
}

.result-table-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
}

footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    padding: 20px;
    opacity: 0.9;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 1000;
}

.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay p {
    color: white;
    font-size: 18px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .upload-box {
        flex-direction: column;
        align-items: stretch;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }

    .data-table {
        font-size: 14px;
    }

    .data-table th,
    .data-table td {
        padding: 8px;
    }
}