/* CSS Custom Properties */
:root {
    --primary-color: #1FAB89;
    --secondary-color: #62D2A2;
    --accent-color: #9DF3C4;
    --light-accent: #D7FBE8;
    --highlight-color: #FF6B9D;
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ffffff;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --border-color: #e9ecef;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #ffffff;
    
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #2d2d2d;
    --border-color: #404040;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-light);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Navigation */
.nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0;
    position: sticky;
    top: 73px;
    z-index: 99;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.5rem 0;
}

.nav-btn {
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.nav-btn:hover,
.nav-btn.active {
    background: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

/* Main Content */
.main {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: 2rem;
    color: var(--text-primary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: var(--font-size-3xl);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color), var(--light-accent));
    border-radius: 50%;
}

.stat-info h3 {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
}

/* Budget Alert */
.budget-alert {
    background: var(--highlight-color);
    color: var(--text-light);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: pulse 2s infinite;
}

.budget-alert.warning {
    background: #f39c12;
}

.budget-alert.success {
    background: var(--primary-color);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Forms */
.expense-form,
.budget-form {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    transition: var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(31, 171, 137, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-danger {
    background: var(--highlight-color);
    color: var(--text-light);
}

/* Quick Actions */
.quick-actions {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.quick-actions h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.quick-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.quick-btn {
    background: var(--light-accent);
    border: 1px solid var(--accent-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.quick-btn:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

/* Budget Progress */
.budget-progress {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    transition: width 0.5s ease;
    position: relative;
}

.progress-fill.warning {
    background: linear-gradient(90deg, #f39c12, #f1c40f);
}

.progress-fill.danger {
    background: linear-gradient(90deg, var(--highlight-color), #e74c3c);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Expense Lists */
.recent-expenses,
.expense-history {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.expense-list {
    max-height: 400px;
    overflow-y: auto;
}

.expense-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.expense-item:hover {
    background: var(--bg-secondary);
}

.expense-item:last-child {
    border-bottom: none;
}

.expense-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.expense-category {
    font-size: var(--font-size-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-accent);
    border-radius: 50%;
}

.expense-details h4 {
    font-size: var(--font-size-base);
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.expense-details p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.expense-amount {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--highlight-color);
}

.expense-actions {
    display: flex;
    gap: 0.5rem;
}

.expense-actions button {
    background: none;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.expense-actions button:hover {
    color: var(--highlight-color);
}

/* Charts */
.chart-container,
.chart-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Defina o tamanho dos gráficos */
.chart-container canvas,
.chart-card canvas {
  width: 100% !important;
  max-width: 400px;
  height: 250px !important;
  max-height: 300px;
  display: block;
  margin: 0 auto;
}

#categoryChart {
  width: 100% !important;
  max-width: 400px;
  height: 250px !important;
}

#expenseTrendChart,
#categoryPieChart {
  width: 100% !important;
  max-width: 350px;
  height: 220px !important;
}

/* Filters */
.report-filters,
.history-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.history-filters input {
    flex: 1;
    min-width: 200px;
}

/* FAQ Section */
.faq-section {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    padding: 1.5rem 0;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 0 1.5rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

/* Toast Messages */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: var(--text-light);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: var(--transition);
    z-index: 1000;
    max-width: 300px;
}

.toast.show {
    transform: translateX(0);
}

.toast.error {
    background: var(--highlight-color);
}

.toast.success {
    background: var(--primary-color);
}

/* No Data State */
.no-data {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .nav-list {
        gap: 0.25rem;
    }
    
    .nav-btn {
        padding: 0.5rem 0.75rem;
        font-size: var(--font-size-xs);
    }
    
    .expense-form,
    .budget-form {
        padding: 1rem;
    }
    
    .quick-buttons {
        grid-template-columns: 1fr 1fr;
    }
    
    .report-filters,
    .history-filters {
        flex-direction: column;
    }
    
    .toast {
        right: 1rem;
        left: 1rem;
        bottom: 1rem;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .header .container {
        padding: 0 1rem;
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .section h2 {
        font-size: var(--font-size-xl);
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-xl);
    }
    
    .stat-value {
        font-size: var(--font-size-lg);
    }
    
    .expense-info {
        gap: 0.5rem;
    }
    
    .expense-category {
        width: 35px;
        height: 35px;
    }
    
    .quick-buttons {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav,
    .footer,
    .toast,
    .btn,
    .quick-actions {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .section {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .chart-container,
    .chart-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
        --shadow-lg: 0 8px 16px rgba(0,0,0,0.4);
    }
}

/* Focus Styles for Better Accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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