.report-section {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.period-selector {
    display: flex;
    gap: 15px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 0.9em;
    color: #666;
    font-weight: 500;
}

.form-input,
.form-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: #3498db;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #2980b9;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #7f8c8d;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.summary-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e0e0e0;
}

.summary-label {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 10px;
}

.summary-value {
    font-size: 1.8em;
    font-weight: bold;
    color: #2c3e50;
}

.table-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.table-controls .form-input {
    flex: 1;
    min-width: 200px;
}

.table-controls .form-select {
    min-width: 180px;
}

.table-container {
    overflow-x: auto;
}

.report-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.report-table thead {
    background: #f8f9fa;
    position: sticky;
    top: 0;
    z-index: 10;
}

.report-table th {
    padding: 12px 8px;
    text-align: left;
    font-weight: 600;
    color: #2c3e50;
    border-bottom: 2px solid #ddd;
    white-space: nowrap;
}

.report-table td {
    padding: 10px 8px;
    border-bottom: 1px solid #e0e0e0;
}

.report-table tbody tr:hover {
    background: #f5f5f5;
}

.report-table tbody tr:nth-child(even) {
    background: #fafafa;
}

.report-table tbody tr:nth-child(even):hover {
    background: #f0f0f0;
}

.stock-status {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 500;
}

.stock-status.sufficient {
    background: #d4edda;
    color: #155724;
}

.stock-status.warning {
    background: #fff3cd;
    color: #856404;
}

.stock-status.danger {
    background: #f8d7da;
    color: #721c24;
}

.stock-status.unknown {
    background: #e2e3e5;
    color: #383d41;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* レスポンシブ */
@media (max-width: 768px) {
    .period-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-group {
        width: 100%;
    }
    
    .table-controls {
        flex-direction: column;
    }
    
    .table-controls .form-input,
    .table-controls .form-select {
        width: 100%;
    }
    
    .report-table {
        font-size: 0.8em;
    }
    
    .report-table th,
    .report-table td {
        padding: 8px 4px;
    }
}