/* CSS Variables for Theming */
:root {
    --bg-color: #f8fafc; /* Light background */
    --container-bg: #ffffff;
    --text-color-primary: #1a202c; /* Dark text for headings */
    --text-color-secondary: #4a5568; /* Muted text for body */
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --chart-bg: #ffffff;
    --input-bg: #ffffff;
    --list-item-bg: #ffffff;
    --box-shadow-main: 0 20px 40px rgba(0, 0, 0, 0.08), 0 5px 15px rgba(0, 0, 0, 0.04);
    --box-shadow-card: 0 8px 16px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.02);
    --box-shadow-chart: 0 4px 10px rgba(0,0,0,0.05);
    --inc-exp-gradient: linear-gradient(to right, #f0f4f8, #e8edf2);
    --sidebar-bg: #ffffff;
    --sidebar-text: #4a5568;
    --sidebar-hover-bg: #f0f4f8;
    --sidebar-active-bg: #ebf4ff;
    --sidebar-active-text: #4c51bf;
    --theme-toggle-color: #667eea; /* Indigo */
}

body.dark-mode {
    --bg-color: #1a202c; /* Dark background */
    --container-bg: #2d3748; /* Darker container */
    --text-color-primary: #e2e8f0; /* Light text */
    --text-color-secondary: #cbd5e0; /* Lighter grey text */
    --border-color: #4a5568;
    --card-bg: #2d3748;
    --chart-bg: #2d3748;
    --input-bg: #4a5568;
    --list-item-bg: #4a5548;
    --box-shadow-main: 0 20px 40px rgba(0, 0, 0, 0.4), 0 5px 15px rgba(0, 0, 0, 0.2);
    --box-shadow-card: 0 8px 16px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.15);
    --box-shadow-chart: 0 4px 10px rgba(0,0,0,0.2);
    --inc-exp-gradient: linear-gradient(to right, #2d3748, #242b36);
    --sidebar-bg: #2d3748;
    --sidebar-text: #cbd5e0;
    --sidebar-hover-bg: #4a5568;
    --sidebar-active-bg: #3c4a5c;
    --sidebar-active-text: #9f7aea; /* Purple for dark mode accent */
    --theme-toggle-color: #9f7aea;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease;
    display: flex; /* For overall layout */
    min-height: 100vh;
}

.app-layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg-color);
    transition: background-color 0.3s ease;
}

/* Sidebar Styling */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    padding: 32px 0;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: background-color 0.3s ease, transform 0.3s ease;
    position: sticky;
    top: 0;
    height: 100vh;
}
.sidebar-header {
    padding: 0 24px 24px;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-color-primary);
    display: flex;
    align-items: center;
    justify-content: space-between; /* For close button on mobile */
    transition: color 0.3s ease;
}
.sidebar-nav {
    flex-grow: 1;
    padding: 0 16px;
}
.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 10px;
    color: var(--sidebar-text);
    font-weight: 500;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.sidebar-nav a:hover {
    background-color: var(--sidebar-hover-bg);
    color: var(--text-color-primary);
}
.sidebar-nav a.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    font-weight: 600;
}
.sidebar-nav a span {
    margin-right: 12px;
    font-size: 1.4rem; /* Icon size */
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    padding: 24px;
    background-color: var(--bg-color);
    transition: background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow-y: auto; /* Enable scrolling */
}

/* Top Navbar */
.top-navbar {
    background-color: var(--container-bg);
    padding: 16px 24px;
    border-radius: 16px;
    box-shadow: var(--box-shadow-card);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.top-navbar .app-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color-primary);
    transition: color 0.3s ease;
}

.top-navbar .theme-toggle {
    font-size: 1.5rem;
    color: var(--text-color-secondary);
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    border-radius: 8px;
    transition: color 0.3s ease, background-color 0.2s ease;
}

.top-navbar .theme-toggle:hover {
    color: var(--text-color-primary);
    background-color: var(--sidebar-hover-bg);
}
.hamburger-menu {
    display: none; /* Hidden on desktop */
    font-size: 2rem;
    background: none;
    border: none;
    color: var(--text-color-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: color 0.3s ease;
}

/* Main Content Panel (Dashboard, Transactions, etc.) */
.content-panel {
    display: none; /* Hidden by default, toggled by JS */
    flex-direction: column;
    gap: 24px;
    padding: 16px;
    border-radius: 16px;
    background-color: var(--container-bg);
    box-shadow: var(--box-shadow-main);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    flex-grow: 1; /* Make panels fill available space */
}
.content-panel.active {
    display: flex;
}

h1 {
    color: var(--text-color-primary);
    text-align: center;
    font-weight: 700;
    font-size: 2.25rem;
    margin-bottom: 25px;
    transition: color 0.3s ease;
}
h3 {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 20px;
    color: var(--text-color-secondary);
    font-weight: 600;
    font-size: 1.25rem;
    transition: color 0.3s ease, border-color 0.3s ease;
}

/* Summary Cards */
.summary-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.summary-card {
    background-color: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--box-shadow-card);
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}
.summary-card h4 {
    font-size: 1rem;
    color: var(--text-color-secondary);
    margin-bottom: 8px;
    font-weight: 500;
    transition: color 0.3s ease;
}
.summary-card .value {
    font-size: 1
    font-weight: 700;
    color: var(--text-color-primary);
    transition: color 0.3s ease;
}
.summary-card .value.income { color: #28a745; }
.summary-card .value.expense { color: #dc3545; }
.summary-card .value.net-savings { color: #007bff; }
.summary-card .value.highest-category {
    font-size: 1.2rem;
}

/* Charts */
.chart-container {
    background-color: var(--chart-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--box-shadow-chart);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.chart-container h4 {
    color: var(--text-color-primary);
    font-weight: 600;
    margin-bottom: 15px;
    text-align: center;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}
.chart-container canvas {
    max-height: 300px;
    width: 100% !important; /* Override Chart.js inline style */
    height: auto !important;
}

/* Transaction List */
.transaction-list-container {
    margin-top: 24px;
}
.filter-search-group {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap; /* Allow wrapping on small screens */
}
.filter-search-group .form-control {
    margin-bottom: 0; /* Remove default margin */
    flex: 1;
    min-width: 150px; /* Ensure inputs don't get too small */
}
.transaction-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}
.transaction-list li {
    background-color: var(--list-item-bg);
    padding: 16px 20px;
    margin-bottom: 12px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
    border-left: 6px solid transparent; /* Placeholder for color coding */
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.transaction-list li.plus { border-left-color: #28a745; }
.transaction-list li.minus { border-left-color: #dc3545; }

.transaction-list .description {
    font-weight: 600;
    color: var(--text-color-primary);
    flex-grow: 1;
    margin-right: 16px;
    transition: color 0.3s ease;
}
.transaction-list .details {
    font-size: 0.85rem;
    color: var(--text-color-secondary);
    margin-top: 4px;
    transition: color 0.3s ease;
}
.transaction-list .amount {
    font-weight: 700;
    font-size: 1.1rem;
    white-space: nowrap;
    color: var(--text-color-primary);
    transition: color 0.3s ease;
}

/* ADD THIS: New class for the action buttons container */
.transaction-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 10px;
}

/* ADD THIS: Style for the new Edit button */
.edit-btn {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}
.edit-btn:hover {
    background-color: #0069d9;
}

.delete-btn {
    background-color: #dc3545;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}
.delete-btn:hover {
    background-color: #c82333;
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    background-color: var(--container-bg);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--box-shadow-main);
    width: 90%;
    max-width: 450px;
    transform: translateY(-20px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
.modal-overlay.open .modal-content {
    transform: translateY(0);
    opacity: 1;
}
.modal-close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color-secondary);
    transition: color 0.3s ease;
}
.modal-close-btn:hover {
    color: var(--text-color-primary);
}
.modal-content h3 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-color-primary);
}
.form-control {
    margin-bottom: 16px; /* Slightly reduced margin in modal */
}
input[type="text"], input[type="number"], input[type="date"], input[type="month"], select {
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color-primary);
    padding: 12px;
    border-radius: 8px;
    width: 100%;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
label {
    color: var(--text-color-secondary);
    transition: color 0.3s ease;
    display: block; /* Make labels block for better spacing */
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
}
.btn-modal-group {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}
.btn-modal-group .btn {
    padding: 12px 15px; /* Smaller padding for modal buttons */
    font-size: 1rem;
    flex: 1; /* Make buttons take equal width */
}

/* Base button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-primary {
    background-color: #4c51bf; /* Indigo 600 */
    color: white;
}
.btn-primary:hover {
    background-color: #434190; /* Darker indigo */
    transform: translateY(-1px);
}

.btn-income {
    background-color: #28a745; /* Green */
    color: white;
}
.btn-income:hover {
    background-color: #218838;
}

.btn-expense {
    background-color: #dc3545; /* Red */
    color: white;
}
.btn-expense:hover {
    background-color: #c82333;
}

/* ADD THIS: Helper class to hide elements */
.hidden {
    display: none !important;
}


/* Toast Message */
#toast-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1001;
    font-size: 0.9rem;
    white-space: nowrap;
}
#toast-message.show {
    opacity: 1;
    visibility: visible;
}
#toast-message.success {
    background-color: #28a745;
}
#toast-message.error {
    background-color: #dc3545;
}

/* Error message within modals/forms */
.error-message {
    color: #dc3545;
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 10px;
    opacity: 0;
    height: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, height 0.3s ease;
}
.error-message.show {
    opacity: 1;
    height: auto;
    padding-bottom: 10px;
}

/* Settings Page Specifics */
#settings-panel .settings-group {
    background-color: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--box-shadow-card);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
#settings-panel .settings-group h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color-primary);
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

#settings-panel .category-input-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    margin-bottom: 20px;
    align-items: flex-end;
}
#settings-panel .category-input-group input {
    flex-grow: 1;
}
#settings-panel #category-list-container ul {
    list-style-type: none;
    padding: 0;
}
#settings-panel #category-list-container li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--list-item-bg);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #667eea; /* Accent for categories */
}
#settings-panel #category-list-container li span {
    color: var(--text-color-primary);
    transition: color 0.3s ease;
}
#settings-panel #category-list-container li .delete-category-btn {
    background-color: #dc3545;
    color: #fff;
    border: none;
    padding: 6px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.2s ease;
}
#settings-panel #category-list-container li .delete-category-btn:hover {
    background-color: #c82333;
}
#settings-panel #category-list-container li.default-category .delete-category-btn {
    background-color: #cccccc;
    cursor: not-allowed;
    opacity: 0.7;
}

/* Export/Import Section */
#export-import-panel .info-text {
    color: var(--text-color-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    transition: color 0.3s ease;
}
#export-import-panel .action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}
#export-import-panel .action-buttons .btn {
    flex: 1;
    min-width: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}
#export-import-panel .action-buttons .btn span {
    margin-right: 8px;
}
#export-import-panel input[type="file"] {
    margin-top: 15px;
    color: var(--text-color-secondary);
}

/* Budget Section Specific Styles */
.budgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.budget-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--box-shadow-card);
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.budget-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-color-primary);
    margin-bottom: 8px;
}
.budget-card .budget-month {
    font-size: 0.9rem;
    color: var(--text-color-secondary);
    margin-bottom: 15px;
}
.budget-card .amounts-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: var(--text-color-secondary);
}
.budget-card .amounts-row span strong {
    color: var(--text-color-primary);
}
.progress-bar-container {
    width: 100%;
    background-color: var(--border-color); /* Light grey background for bar */
    border-radius: 9999px; /* Full rounded */
    height: 10px;
    overflow: hidden;
    margin-bottom: 15px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}
.progress-bar {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.6s ease-in-out, background-color 0.3s ease;
}
.progress-green { background-color: #28a745; } /* Green */
.progress-yellow { background-color: #ffc107; } /* Yellow */
.progress-red { background-color: #dc3545; } /* Red */
.budget-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}
.budget-actions .btn {
    padding: 8px 12px;
    font-size: 0.85rem;
}

/* Analytics Panel Specific Styles */
.analytics-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 8px;
    box-shadow: var(--box-shadow-card);
    border: 1px solid var(--border-color);
}
.analytics-tab-btn {
    padding: 10px 20px;
    border-radius: 8px;
    background-color: transparent;
    border: none;
    color: var(--text-color-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.analytics-tab-btn.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}
.analytics-view-content {
    display: none; /* Hidden by default */
    flex-direction: column;
    gap: 24px;
}
.analytics-view-content.active {
    display: flex;
}
.analytics-filter-group {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: flex-end;
}
.analytics-filter-group .form-control {
    margin-bottom: 0;
    flex: 1;
    min-width: 150px;
}
.analytics-filter-group label {
    margin-bottom: 8px;
}

/* Auth Modal Styles */
.auth-tabs {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.auth-tab {
  flex: 1;
  padding: 0.5rem 0;
  background: var(--sidebar-hover-bg);
  border: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--sidebar-text);
  border-bottom: 2px solid transparent;
  transition: background 0.2s, border-bottom 0.2s;
}
.auth-tab.active {
  background: var(--container-bg);
  border-bottom: 2px solid var(--theme-toggle-color);
  color: var(--sidebar-active-text);
}
.auth-form {
  display: block;
}
.auth-form.hidden {
  display: none;
}
#authModal .modal-content {
  max-width: 400px;
}



/* Responsive Adjustments */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        transform: translateX(-100%);
        z-index: 100;
        box-shadow: 2px 0 15px rgba(0,0,0,0.2);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        padding: 16px;
    }
    .top-navbar {
        padding: 12px 16px;
        border-radius: 12px;
        margin-bottom: 16px;
    }
    .hamburger-menu {
        display: block;
        margin-right: 12px;
    }
    .top-navbar .app-name {
        font-size: 1.2rem;
    }
    .top-navbar .current-month-dropdown {
        margin-right: 10px;
    }
  
    .top-navbar .theme-toggle {
        font-size: 1.3rem;
        padding: 6px;
    }

    .content-panel {
        padding: 12px;
        border-radius: 12px;
        gap: 16px;
    }
    h1 {
        font-size: 1.8rem;
        margin-bottom: 18px;
    }
    h3 {
        font-size: 1.1rem;
        margin-bottom: 16px;
        padding-bottom: 8px;
    }
    .summary-card {
        padding: 18px;
    }
    .summary-card .value {
        font-size: 1.5rem;
    }
    .chart-container {
        padding: 15px;
        margin-bottom: 16px;
    }
    .chart-container canvas {
        max-height: 200px;
    }

    .filter-search-group {
        flex-direction: column;
        gap: 10px;
    }
    .transaction-list li {
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 16px;
    }
    .transaction-list .description {
        width: 100%;
        margin-bottom: 4px;
        margin-right: 0;
    }
    .transaction-list .amount {
        width: 100%;
        text-align: left;
        margin-top: 8px; /* Add space between details and amount */
    }
    /* Adjust actions for mobile */
    .transaction-actions {
        position: absolute;
        top: 10px;
        right: 10px;
    }
    .btn-group {
        flex-direction: column;
    }
    .modal-content {
        width: 95%;
        padding: 20px;
    }
    #category-management-section .category-input-group {
        flex-direction: column;
        gap: 10px;
    }
    #category-management-section .category-input-group input,
    #category-management-section .category-input-group button {
        width: 100%;
    }
}

/* Theme Dropdown Styles */
.theme-dropdown-container {
    display: inline-block;
    margin-right: 1rem;
}
.theme-select {
    padding: 0.3rem 1.5rem 0.3rem 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--container-bg);
    color: var(--text-color-primary);
    font-size: 1rem;
    outline: none;
    transition: background 0.3s, color 0.3s;
}
.theme-select:focus {
    border-color: var(--theme-toggle-color);
}