/* Global Styles */
* {
    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;
    color: #333;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: white;
    border-radius: 15px;
    padding: 20px 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: #667eea;
    font-size: 28px;
}

.auth-status {
    display: flex;
    align-items: center;
    gap: 15px;
}

#userEmail {
    color: #666;
    font-size: 14px;
}

#logoutBtn {
    background: #f44336;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

#logoutBtn:hover {
    background: #d32f2f;
}

/* Login Section */
.login-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    color: #667eea;
    margin-bottom: 30px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

#loginBtn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: transform 0.3s;
}

#loginBtn:hover {
    transform: translateY(-2px);
}

/* Google登录按钮样式 */
.google-signin-btn {
    width: 100%;
    background: white;
    color: #3c4043;
    border: 1px solid #dadce0;
    padding: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.google-signin-btn:hover {
    background: #f8f9fa;
    box-shadow: 0 1px 2px 0 rgba(60,64,67,.30), 0 1px 3px 1px rgba(60,64,67,.15);
    transform: translateY(-1px);
}

/* 分隔线 */
.divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #dadce0;
}

.divider span {
    background: white;
    padding: 0 16px;
    position: relative;
    color: #666;
    font-size: 14px;
}

.error-message {
    color: #f44336;
    font-size: 14px;
    margin-top: 10px;
    text-align: center;
}

/* Dashboard Sections */
#dashboardSection {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Filters Section */
.filters-section {
    margin-bottom: 30px;
    padding: 20px;
    background: #f5f7fa;
    border-radius: 10px;
}

.filters-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    font-weight: 600;
}

.filter-group select,
.filter-group input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.filter-group select[multiple] {
    min-height: 100px;
}

#customDateRange {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.btn-primary,
.btn-secondary {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #e0e0e0;
    color: #666;
}

.btn-secondary:hover {
    background: #d0d0d0;
}

/* Statistics Section */
.stats-section {
    margin-bottom: 30px;
}

.stats-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
}

/* Charts Section */
.charts-section {
    margin-bottom: 30px;
}

.charts-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    min-height: 300px;
}

.chart-container h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 16px;
}

.chart-container canvas {
    max-height: 250px;
}

/* Table Section */
.table-section {
    margin-top: 30px;
}

.table-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.table-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

#searchInput {
    flex: 1;
    min-width: 200px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

#pageSize {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.btn-export {
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-export:hover {
    background: #45a049;
}

.table-wrapper {
    overflow-x: auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

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

thead {
    background: #f5f7fa;
}

th {
    padding: 15px;
    text-align: left;
    color: #667eea;
    font-weight: 600;
    font-size: 14px;
    border-bottom: 2px solid #e0e0e0;
}

td {
    padding: 12px 15px;
    font-size: 14px;
    border-bottom: 1px solid #f0f0f0;
}

tbody tr:hover {
    background: #f9f9f9;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.pagination button:hover:not(:disabled) {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

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

#pageInfo {
    font-size: 14px;
    color: #666;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    color: white;
    margin-top: 20px;
    font-size: 16px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .filters-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .table-controls {
        flex-direction: column;
    }
    
    #searchInput {
        width: 100%;
    }
}