:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 4px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.last-updated {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-refresh {
    background: var(--primary-color);
    color: white;
}

.btn-refresh:hover {
    background: var(--primary-hover);
}

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

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.card-highlight {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    border: none;
    color: white;
}

.card-highlight .card-label {
    color: rgba(255, 255, 255, 0.8);
}

.card-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.card-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.card-value.positive {
    color: var(--success-color);
}

.card-value.negative {
    color: var(--danger-color);
}

.card-highlight .card-value {
    color: white;
}

.main-content {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.table-title {
    font-weight: 600;
    font-size: 1rem;
}

.quick-filter {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
    width: 250px;
    max-width: 100%;
}

.quick-filter:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#dataGrid {
    height: 500px;
    width: 100%;
}

.ag-theme-alpine {
    --ag-header-background-color: #f8fafc;
    --ag-odd-row-background-color: #fafafa;
    --ag-row-hover-color: #f1f5f9;
    --ag-border-color: #e2e8f0;
}

.ag-theme-alpine .ag-header-cell-label {
    font-weight: 600;
}

.cell-positive {
    color: var(--success-color);
    font-weight: 600;
}

.cell-negative {
    color: var(--danger-color);
    font-weight: 600;
}

.cell-neutral {
    color: var(--text-secondary);
}

.change-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.change-badge.positive {
    background: #dcfce7;
    color: var(--success-color);
}

.change-badge.negative {
    background: #fef2f2;
    color: var(--danger-color);
}

/* Login overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.login-overlay.hidden {
    display: none;
}

.login-box {
    background: var(--surface);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.login-box h2 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1.5rem;
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.875rem;
}

.login-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    margin-bottom: 16px;
    transition: border-color 0.2s;
}

.login-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-login {
    width: 100%;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-login:hover {
    background: var(--primary-hover);
}

.login-error {
    color: var(--danger-color);
    margin-top: 16px;
    font-size: 0.875rem;
}

.footer {
    margin-top: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.error-message {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--danger-color);
    padding: 12px 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-md);
    z-index: 1001;
}

.error-message button {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .summary-cards {
        grid-template-columns: 1fr 1fr;
    }

    .table-header {
        flex-direction: column;
        align-items: stretch;
    }

    .quick-filter {
        width: 100%;
    }

    #dataGrid {
        height: 400px;
    }
}

@media (max-width: 480px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
}