/* Base Styles and Variables */
:root {
    /* Color Palette - Black and White Theme */
    --primary-color: #000000;
    --secondary-color: #333333;
    --accent-color: #666666;
    --background-color: #ffffff;
    --card-color: #f5f5f5;
    --text-color: #000000;
    --text-secondary: #555555;
    --border-color: #dddddd;
    --success-color: #2e7d32;
    --warning-color: #ff9800;
    --danger-color: #d32f2f;
    --info-color: #0288d1;
  
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
  
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
  
    /* Font Sizes */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-md: 1rem;
    --font-lg: 1.25rem;
    --font-xl: 1.5rem;
    --font-2xl: 2rem;
    --font-3xl: 2.5rem;
  
    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --header-height: 70px;
  }
  
  /* Dark Theme */
  .dark-theme {
    --primary-color: #ffffff;
    --secondary-color: #cccccc;
    --accent-color: #999999;
    --background-color: #121212;
    --card-color: #1e1e1e;
    --text-color: #ffffff;
    --text-secondary: #aaaaaa;
    --border-color: #333333;
  
    /* Shadows for dark theme */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  }
  
  /* Reset and Base Styles */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html,
  body {
    height: 100%;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: var(--transition-normal);
  }
  
  body {
    overflow-x: hidden;
  }
  
  a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  button {
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition-fast);
  }
  
  input,
  textarea,
  select {
    font-family: inherit;
    font-size: var(--font-md);
    color: var(--text-color);
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-fast);
  }
  
  input:focus,
  textarea:focus,
  select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
  }
  
  .dark-theme input:focus,
  .dark-theme textarea:focus,
  .dark-theme select:focus {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
  }
  
  textarea {
    resize: vertical;
    min-height: 100px;
  }
  
  ul {
    list-style: none;
  }
  
  .hidden {
    display: none !important;
  }
  
  /* Buttons */
  .primary-btn {
    background-color: var(--primary-color);
    color: var(--background-color);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--transition-fast);
  }
  
  .primary-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  
  .secondary-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--transition-fast);
  }
  
  .secondary-btn:hover {
    background-color: var(--card-color);
    transform: translateY(-2px);
  }
  
  /* Authentication Styles */
  .auth-container {
    max-width: 500px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    justify-content: center;
  }
  
  .auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.8s ease;
  }
  
  .auth-logo i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
  }
  
  .auth-logo h1 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--primary-color);
  }
  
  .auth-tabs {
    display: flex;
    width: 100%;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.8s ease;
  }
  
  .auth-tab {
    flex: 1;
    background: none;
    border: none;
    padding: var(--spacing-md);
    font-size: var(--font-md);
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
  }
  
  .auth-tab.active {
    color: var(--primary-color);
  }
  
  .auth-tab.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
  }
  
  .auth-form {
    width: 100%;
    display: none;
    animation: fadeIn 0.5s ease;
  }
  
  .auth-form.active {
    display: block;
  }
  
  .form-group {
    margin-bottom: var(--spacing-lg);
  }
  
  .form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-color);
  }
  
  .input-icon {
    position: relative;
  }
  
  .input-icon i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
  }
  
  .input-icon input {
    padding-left: 2.5rem;
    width: 100%;
  }
  
  .input-icon .toggle-password {
    left: auto;
    right: var(--spacing-md);
    cursor: pointer;
  }
  
  .error-message {
    display: block;
    color: var(--danger-color);
    font-size: var(--font-sm);
    margin-top: var(--spacing-xs);
    min-height: 20px;
  }
  
  .remember-me {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .checkbox-container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 30px;
    cursor: pointer;
    user-select: none;
  }
  
  .checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
  }
  
  .checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
  }
  
  .checkbox-container:hover input ~ .checkmark {
    background-color: var(--card-color);
  }
  
  .checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
  }
  
  .checkmark:after {
    content: "";
    position: absolute;
    display: none;
  }
  
  .checkbox-container input:checked ~ .checkmark:after {
    display: block;
  }
  
  .checkbox-container .checkmark:after {
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
  }
  
  .forgot-password {
    color: var(--primary-color);
    font-size: var(--font-sm);
  }
  
  .auth-button {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--primary-color);
    color: var(--background-color);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-top: var(--spacing-md);
    transition: var(--transition-fast);
  }
  
  .auth-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  
  .auth-separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-lg) 0;
  }
  
  .auth-separator::before,
  .auth-separator::after {
    content: "";
    flex: 1;
    border-bottom: 1px solid var(--border-color);
  }
  
  .auth-separator span {
    padding: 0 var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-sm);
  }
  
  .social-login {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--background-color);
    color: var(--text-color);
    font-weight: 600;
    transition: var(--transition-fast);
  }
  
  .social-btn:hover {
    background-color: var(--card-color);
    transform: translateY(-2px);
  }
  
  .social-btn.google i {
    color: #db4437;
  }
  
  .social-btn.facebook i {
    color: #4267b2;
  }
  
  .terms a {
    text-decoration: underline;
  }
  
  /* App Layout */
  .app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
  }
  
  /* Sidebar */
  .sidebar {
    width: var(--sidebar-width);
    height: 100%;
    background-color: var(--card-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
    z-index: 100;
  }
  
  .sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
  }
  
  .sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
  }
  
  .logo i {
    font-size: var(--font-xl);
    color: var(--primary-color);
  }
  
  .logo span {
    font-weight: 700;
    font-size: var(--font-lg);
    color: var(--primary-color);
  }
  
  .sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: var(--font-md);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
  }
  
  .sidebar-toggle:hover {
    background-color: var(--border-color);
  }
  
  .sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
  }
  
  .user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--primary-color);
    color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
  }
  
  .user-avatar.small {
    width: 30px;
    height: 30px;
    font-size: var(--font-xs);
  }
  
  .user-info {
    display: flex;
    flex-direction: column;
  }
  
  .user-info #user-name {
    font-weight: 600;
  }
  
  .user-info #user-email {
    font-size: var(--font-sm);
    color: var(--text-secondary);
  }
  
  .sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
  }
  
  .sidebar-nav ul {
    display: flex;
    flex-direction: column;
  }
  
  .sidebar-nav li {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition-fast);
  }
  
  .sidebar-nav li:hover {
    background-color: rgba(0, 0, 0, 0.05);
  }
  
  .dark-theme .sidebar-nav li:hover {
    background-color: rgba(255, 255, 255, 0.05);
  }
  
  .sidebar-nav li.active {
    background-color: rgba(0, 0, 0, 0.1);
    border-left: 3px solid var(--primary-color);
  }
  
  .dark-theme .sidebar-nav li.active {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .sidebar-nav li i {
    margin-right: var(--spacing-md);
    font-size: var(--font-lg);
    width: 24px;
    text-align: center;
  }
  
  .sidebar-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
  }
  
  .sidebar-footer button {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-color);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
  }
  
  .sidebar-footer button:hover {
    background-color: rgba(0, 0, 0, 0.05);
  }
  
  .dark-theme .sidebar-footer button:hover {
    background-color: rgba(255, 255, 255, 0.05);
  }
  
  /* Main Content */
  .main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  
  /* Top Header */
  .top-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--background-color);
    z-index: 50;
  }
  
  .header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }
  
  .menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: var(--font-lg);
  }
  
  .search-bar {
    position: relative;
    width: 300px;
  }
  
  .search-bar i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
  }
  
  .search-bar input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 2.5rem;
    border-radius: var(--radius-full);
    background-color: var(--card-color);
    border: 1px solid var(--border-color);
  }
  
  .header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }
  
  .theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: var(--font-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
  }
  
  .theme-toggle:hover {
    background-color: var(--card-color);
  }
  
  .theme-toggle .fa-sun {
    display: none;
  }
  
  .dark-theme .theme-toggle .fa-moon {
    display: none;
  }
  
  .dark-theme .theme-toggle .fa-sun {
    display: block;
    color: #ffc107;
  }
  
  .notifications {
    position: relative;
  }
  
  .notification-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: var(--font-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
  }
  
  .notification-btn:hover {
    background-color: var(--card-color);
  }
  
  .notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--danger-color);
    color: white;
    font-size: var(--font-xs);
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .notification-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 350px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: none;
    animation: fadeIn 0.3s ease;
  }
  
  .notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
  }
  
  .notification-header h3 {
    font-size: var(--font-md);
    font-weight: 600;
  }
  
  .mark-all-read {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: var(--font-sm);
    cursor: pointer;
  }
  
  .notification-list {
    max-height: 300px;
    overflow-y: auto;
  }
  
  .notification-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-fast);
  }
  
  .notification-item:hover {
    background-color: var(--card-color);
  }
  
  .notification-item.unread {
    background-color: rgba(0, 0, 0, 0.02);
  }
  
  .dark-theme .notification-item.unread {
    background-color: rgba(255, 255, 255, 0.05);
  }
  
  .notification-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--card-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
  }
  
  .notification-content {
    flex: 1;
  }
  
  .notification-content p {
    margin-bottom: var(--spacing-xs);
  }
  
  .notification-time {
    font-size: var(--font-xs);
    color: var(--text-secondary);
  }
  
  .notification-footer {
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
  }
  
  .notification-footer a {
    color: var(--primary-color);
    font-size: var(--font-sm);
  }
  
  .user-menu {
    position: relative;
  }
  
  .user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-color);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
  }
  
  .user-menu-btn:hover {
    background-color: var(--card-color);
  }
  
  .user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 200px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: none;
    animation: fadeIn 0.3s ease;
  }
  
  .user-dropdown ul {
    padding: var(--spacing-sm) 0;
  }
  
  .user-dropdown li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-fast);
  }
  
  .user-dropdown li:hover {
    background-color: var(--card-color);
  }
  
  .dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-sm) 0;
  }
  
  /* Page Content */
  .page {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
    display: none;
  }
  
  .page.active {
    display: block;
    animation: fadeIn 0.3s ease;
  }
  
  .page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
  }
  
  .page-header h1 {
    font-size: var(--font-2xl);
    font-weight: 700;
  }
  
  .current-date {
    color: var(--text-secondary);
    font-size: var(--font-md);
  }
  
  /* Dashboard */
  .dashboard-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
  }
  
  .summary-card {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
  }
  
  .summary-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
  }
  
  .summary-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background-color: rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-xl);
    color: var(--primary-color);
  }
  
  .dark-theme .summary-icon {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .summary-info h3 {
    font-size: var(--font-md);
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
  }
  
  .summary-info p {
    font-size: var(--font-2xl);
    font-weight: 700;
  }
  
  .dashboard-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
  }
  
  .chart-container {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
  }
  
  .chart-header h3 {
    font-size: var(--font-lg);
    font-weight: 600;
  }
  
  .chart-period {
    display: flex;
    gap: var(--spacing-xs);
  }
  
  .period-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-sm);
    color: var(--text-secondary);
    transition: var(--transition-fast);
  }
  
  .period-btn:hover {
    background-color: var(--border-color);
  }
  
  .period-btn.active {
    background-color: var(--primary-color);
    color: var(--background-color);
    border-color: var(--primary-color);
  }
  
  .chart-body {
    height: 300px;
    position: relative;
  }
  
  .dashboard-recent {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .recent-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
  }
  
  .recent-header h3 {
    font-size: var(--font-lg);
    font-weight: 600;
  }
  
  .view-all {
    color: var(--primary-color);
    font-size: var(--font-sm);
  }
  
  .recent-tasks {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  /* Tasks Page */
  .task-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }
  
  .filter-group {
    display: flex;
    gap: var(--spacing-xs);
  }
  
  .filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-color);
    transition: var(--transition-fast);
  }
  
  .filter-btn:hover {
    background-color: var(--card-color);
  }
  
  .filter-btn.active {
    background-color: var(--primary-color);
    color: var(--background-color);
    border-color: var(--primary-color);
  }
  
  .sort-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
  }
  
  .sort-group label {
    color: var(--text-secondary);
  }
  
  .progress-container {
    margin-bottom: var(--spacing-lg);
  }
  
  .progress-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
  }
  
  .progress-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
  }
  
  .progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.5s ease-in-out;
  }
  
  .task-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .task-item {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    animation: fadeIn 0.3s ease;
  }
  
  .task-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  
  .task-checkbox {
    margin-top: var(--spacing-xs);
  }
  
  .task-content {
    flex: 1;
  }
  
  .task-title {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
  }
  
  .task-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
  }
  
  .task-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-sm);
    color: var(--text-secondary);
  }
  
  .task-due {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .task-priority {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .priority-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    font-weight: 600;
  }
  
  .priority-badge.low {
    background-color: rgba(46, 125, 50, 0.1);
    color: var(--success-color);
  }
  
  .priority-badge.medium {
    background-color: rgba(255, 152, 0, 0.1);
    color: var(--warning-color);
  }
  
  .priority-badge.high {
    background-color: rgba(211, 47, 47, 0.1);
    color: var(--danger-color);
  }
  
  .task-actions {
    display: flex;
    gap: var(--spacing-sm);
  }
  
  .task-action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-md);
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
  }
  
  .task-action-btn:hover {
    background-color: var(--border-color);
    color: var(--text-color);
  }
  
  .task-action-btn.edit:hover {
    color: var(--info-color);
  }
  
  .task-action-btn.delete:hover {
    color: var(--danger-color);
  }
  
  .task-completed .task-title {
    text-decoration: line-through;
    color: var(--text-secondary);
  }
  
  /* Calendar Page */
  .calendar-container {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
  }
  
  .calendar-header h2 {
    font-size: var(--font-xl);
    font-weight: 600;
  }
  
  .calendar-nav-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    transition: var(--transition-fast);
  }
  
  .calendar-nav-btn:hover {
    background-color: var(--border-color);
  }
  
  .calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
  }
  
  .calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-sm);
  }
  
  .calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
  }
  
  .calendar-day:hover {
    background-color: var(--border-color);
  }
  
  .calendar-day.today {
    background-color: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--primary-color);
  }
  
  .dark-theme .calendar-day.today {
    background-color: rgba(255, 255, 255, 0.05);
  }
  
  .calendar-day.selected {
    background-color: var(--primary-color);
    color: var(--background-color);
  }
  
  .calendar-day.other-month {
    color: var(--text-secondary);
    opacity: 0.5;
  }
  
  .calendar-day-number {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
  }
  
  .calendar-day-events {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    justify-content: center;
  }
  
  .calendar-event-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: var(--primary-color);
  }
  
  .calendar-events {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .calendar-events h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
  }
  
  .event-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .event-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
  }
  
  .event-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
  }
  
  .event-time {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    min-width: 80px;
  }
  
  .event-content {
    flex: 1;
  }
  
  .event-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
  }
  
  .event-description {
    font-size: var(--font-sm);
    color: var(--text-secondary);
  }
  
  /* Settings Page */
  .settings-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .settings-section {
    background-color: var(--card-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .settings-section h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
  }
  
  .settings-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .toggle-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
  }
  
  .toggle input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  .toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-fast);
    border-radius: 34px;
  }
  
  .toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
  }
  
  .toggle input:checked + .toggle-slider {
    background-color: var(--primary-color);
  }
  
  .toggle input:checked + .toggle-slider:before {
    transform: translateX(26px);
  }
  
  /* Modal */
  .modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
  }
  
  .modal-content {
    background-color: var(--background-color);
    margin: 10% auto;
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.3s ease;
  }
  
  .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
  }
  
  .modal-header h2 {
    font-size: var(--font-xl);
    font-weight: 600;
  }
  
  .close-modal {
    background: none;
    border: none;
    font-size: var(--font-2xl);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
  }
  
  .close-modal:hover {
    color: var(--text-color);
  }
  
  .modal-body {
    padding: var(--spacing-lg);
  }
  
  .form-row {
    display: flex;
    gap: var(--spacing-md);
  }
  
  .form-row .form-group {
    flex: 1;
  }
  
  .modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
  }
  
  /* Animations */
  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }
  
  @keyframes fadeInDown {
    from {
      opacity: 0;
      transform: translateY(-20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-50px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Responsive Design */
  @media (max-width: 992px) {
    .dashboard-charts {
      grid-template-columns: 1fr;
    }
  
    .search-bar {
      width: 200px;
    }
  }
  
  @media (max-width: 768px) {
    .sidebar {
      position: fixed;
      left: -100%;
    }
  
    .sidebar.active {
      left: 0;
    }
  
    .menu-toggle {
      display: block;
    }
  
    .search-bar {
      display: none;
    }
  
    .dashboard-summary {
      grid-template-columns: repeat(2, 1fr);
    }
  
    .task-filters {
      flex-direction: column;
      align-items: flex-start;
    }
  
    .form-row {
      flex-direction: column;
    }
  }
  
  @media (max-width: 576px) {
    .dashboard-summary {
      grid-template-columns: 1fr;
    }
  
    .task-item {
      flex-direction: column;
    }
  
    .task-actions {
      align-self: flex-end;
    }
  
    .modal-content {
      margin: 5% auto;
      width: 95%;
    }
  
    .auth-container {
      padding: var(--spacing-md);
    }
  }