/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #8b5cf6;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --info-color: #06b6d4;
    --dark-bg: #1f2937;
    --light-bg: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Status Bar */
.status-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

.connection-status.online {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.connection-status.offline {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.online-dot {
    background-color: var(--success-color);
    animation: pulse 2s infinite;
}

.offline-dot {
    background-color: var(--danger-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.sync-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.sync-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.sync-btn:active {
    transform: translateY(0);
}

.sync-btn.syncing {
    background: var(--info-color);
    animation: spin 1s linear infinite;
}

.sync-btn.syncing i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.demo-login small {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Main App Container */
.app-container {
    max-width: 1200px;
    margin: 4rem auto 2rem;
    padding: 0 1.5rem;
}

.app-header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.app-header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Budget Form */
.budget-form-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.currency {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.save-indicator {
    position: absolute;
    right: 1rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--success-color);
    opacity: 0;
    transition: opacity 0.3s;
}

.save-indicator.saved {
    opacity: 1;
}

.hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-summary {
    display: flex;
    justify-content: space-between;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.summary-item span:first-child {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.summary-item span:last-child {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Dashboard */
.dashboard-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0 2rem;
}

.metric-card {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.metric-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
}

.metric-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 0.5s ease;
}

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

.metric-trend {
    margin: 1rem 0;
}

.trend {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.trend.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.trend.negative {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.prediction-label {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--info-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

/* Charts and Warnings */
.charts-warnings-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

@media (max-width: 1024px) {
    .charts-warnings-grid {
        grid-template-columns: 1fr;
    }
}

.chart-container {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.chart-wrapper {
    position: relative;
    height: 300px;
    margin: 1rem 0;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.warnings-container {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.warnings-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1rem 0;
}

.warning-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.warning-item.high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-left: 3px solid var(--danger-color);
}

.warning-item.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-left: 3px solid var(--warning-color);
}

.warning-item.none {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-left: 3px solid var(--success-color);
}

.ai-suggestions {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    font-size: 0.875rem;
}

/* Data Status */
.data-status-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.status-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.status-card {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

.status-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.status-card.server .status-icon {
    background: var(--info-color);
}

.status-card.export .status-icon {
    background: var(--success-color);
}

.status-info h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.status-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.last-saved {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.export-btn {
    padding: 0.375rem 0.75rem;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
}

.export-btn:hover {
    background: #0da271;
}

/* Footer */
.app-footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-note {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1001;
}

.toast {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-top: 0.75rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.info {
    border-left-color: var(--info-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        margin: 5rem auto 1rem;
        padding: 0 1rem;
    }
    
    .app-header h1 {
        font-size: 2rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-warnings-grid {
        grid-template-columns: 1fr;
    }
    
    .status-cards {
        grid-template-columns: 1fr;
    }
    
    .status-bar {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .demo-login small {
        font-size: 0.7rem;
    }
}