/* Reset and CSS Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme */
    --bg-primary: #f1f5f9;    /* main background - very light bluish gray */
    --bg-secondary: #e2e8f0;  /* cards/secondary areas */
    --bg-tertiary: #ffffff;   /* contrast areas */
    --text-primary: #1e293b;  /* strong text (graphite blue) */
    --text-secondary: #475569;/* secondary text */
    --text-muted: #94a3b8;    /* muted text */
    --border-color: #cbd5e1; 
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Status Colors */
    --todo-color: #ef4444;
    --progress-color: #f59e0b;
    --review-color: #8b5cf6;
    --done-color: #10b981;
    
    /* Tag Colors */
    --tag-urgente: #ef4444;
    --tag-importante: #f59e0b;
    --tag-pessoal: #06b6d4;
    --tag-trabalho: #8b5cf6;
    
    /* Action Colors */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Borders */
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
}

/* Dark Theme */
.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
}

/* Base Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
    position: fixed;
    height: 100vh;
    z-index: 1000;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.5rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    display: none;
}

.sidebar-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.sidebar-nav ul {
    list-style: none;
}

.nav-item {
    margin: 0.25rem 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
}
/* Calendar Navigation Styles */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: center;
    margin-bottom: 1rem;
}

.calendar-nav {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.calendar-nav:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.calendar-header h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0; /* Remove default margin */
}
.nav-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active .nav-link {
    background-color: var(--primary-color);
    color: white;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Styles for Priority Tag on Card */
.tag.priority.high {
    background-color: var(--tag-urgente); /* Red */
}

.tag.priority.medium {
    background-color: var(--tag-importante); /* Orange */
}

.tag.priority.low {
    background-color: var(--success-color); /* Green */
}

/* Styles for Priority Display on Card */
.task-priority {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.priority-display {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.priority-display i {
    font-size: 0.65rem;
}

/* Colors for the new priority display */
.priority-display.high {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

.priority-display.medium {
    color: #f59e0b;
    background-color: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

.priority-display.low {
    color: #10b981;
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.header-left {
    flex: 1;
    min-width: 200px;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

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

.header-center {
    flex: 1;
    max-width: 400px;
}

.search-container {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.header-right {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

/* Filters */
.filters-container {
    padding: 1.5rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.filter-input,
.filter-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    min-width: 120px;
}

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

/* Kanban Board */
.kanban-board {
    flex: 1;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    overflow-x: auto;
}

.column {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    min-height: 600px;
    transition: all var(--transition-normal);
}

.column:hover {
    box-shadow: var(--shadow-medium);
}

.column-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.column-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.column-title i {
    font-size: 0.75rem;
}

.todo-color { color: var(--todo-color); }
.progress-color { color: var(--progress-color); }
.review-color { color: var(--review-color); }
.done-color { color: var(--done-color); }

.task-count {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.column-add-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.column-add-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.column-content {
    flex: 1;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
}

/* Task Cards */
.task-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.task-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.task-card.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

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

.task-title {
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
    flex: 1;
    margin-right: 0.5rem;
}

.task-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.task-card:hover .task-actions {
    opacity: 1;
}

.task-action-btn {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all var(--transition-fast);
}

.task-action-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.task-action-btn.delete:hover {
    background-color: var(--danger-color);
}

.task-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.task-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.tag.urgente { background-color: var(--tag-urgente); }
.tag.importante { background-color: var(--tag-importante); }
.tag.pessoal { background-color: var(--tag-pessoal); }
.tag.trabalho { background-color: var(--tag-trabalho); }

.task-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.task-date {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.task-date.overdue {
    color: var(--danger-color);
}

.task-date.due-soon {
    color: var(--tag-importante);
}

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

.task-status-indicator.todo { background-color: var(--todo-color); }
.task-status-indicator.in-progress { background-color: var(--progress-color); }
.task-status-indicator.in-review { background-color: var(--review-color); }
.task-status-indicator.done { background-color: var(--done-color); }

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-large);
    transform: scale(0.9) translateY(20px);
    transition: all var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--danger-color);
    color: white;
}

.modal-form {
    padding: 1.5rem;
}

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

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.tags-container {
    margin-top: 0.5rem;
}

.tag-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tag-option {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.tag-option input[type="checkbox"] {
    display: none;
}

.tag-option .tag {
    opacity: 0.5;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tag-option input[type="checkbox"]:checked + .tag {
    opacity: 1;
    transform: scale(1.05);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* Drag and Drop */
.column-content.drag-over {
    background-color: rgba(99, 102, 241, 0.1);
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius-lg);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .kanban-board {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 100%;
        max-width: 280px;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .header {
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .header-left,
    .header-center,
    .header-right {
        flex: none;
        text-align: center;
    }
    
    .header-actions {
        justify-content: center;
    }
    
    .filters-container {
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .filter-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }
    
    .kanban-board {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1rem;
    }
    
    .column {
        min-height: 400px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.5rem;
       
    }
    
    .btn-primary span,
    .btn-secondary span {
        display: none;
    }
    
    .task-card {
        padding: 1rem;
    }
    
    .modal {
        width: 95%;
        margin: 1rem;
    }
    
    .calendar-widget {
        margin: 0.5rem;
        padding: 0.75rem;
    }
    
    .export-menu {
        right: auto;
        left: 0;
        min-width: 180px;
    }
    
    .undo-toast {
        left: 1rem;
        right: 1rem;
        transform: translateY(100px);
    }
    
    .undo-toast.show {
        transform: translateY(0);
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .header,
    .filters-container,
    .task-actions,
    .column-add-btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .kanban-board {
        display: block;
        padding: 0;
    }
    
    .column {
        break-inside: avoid;
        margin-bottom: 2rem;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .task-card {
        break-inside: avoid;
        margin-bottom: 0.5rem;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.task-card {
    animation: slideIn 0.4s ease;
}

.modal-overlay.active {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}


/* ===== ADVANCED FEATURES ===== */

/* Calendar Widget */
.calendar-widget {
    margin: 1rem;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.calendar-header {
    text-align: center;
    margin-bottom: 1rem;
}

.calendar-header h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.calendar-grid {
    font-size: 0.75rem;
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 0.5rem;
}

.calendar-weekdays span {
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.25rem;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.calendar-day:not(.empty):hover {
    background-color: var(--bg-tertiary);
}

.calendar-day.today {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.calendar-day.has-tasks::after {
    content: '';
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 4px;
    height: 4px;
    background-color: var(--success-color);
    border-radius: 50%;
}

.calendar-day.selected {
    background-color: var(--primary-color);
    color: white;
}

.calendar-day.empty {
    cursor: default;
}

/* Productivity Indicators */
.productivity-indicators {
    display: flex;
    gap: 2rem;
    margin: 1rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    justify-content: space-around;
}

.indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.indicator-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.indicator-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Priority System */
.priority-indicator {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.priority-high { background-color: #ef4444; }
.priority-medium { background-color: #f59e0b; }
.priority-low { background-color: #10b981; }
.priority-selector {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.priority-option {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0.6; /* Makes unselected options less prominent */
}

.priority-option i {
    font-size: 0.65rem;
}

.priority-option:hover,
.priority-option.selected {
    opacity: 1; /* Increases prominence on hover or when selected */
}

/* Colors for priority options in the modal */
.priority-option.high {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

.priority-option.medium {
    color: #f59e0b;
    background-color: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

.priority-option.low {
    color: #10b981;
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

.priority-option.selected {
    border-color: var(--primary-color); /* Adds a blue border to indicate selection */
    box-shadow: 0 0 0 1px var(--primary-color);
}

/* Subtasks */
.subtasks-container {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.subtask-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    font-size: 0.875rem;
}

.subtask-checkbox {
    width: 16px;
    height: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.subtask-checkbox.completed {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.subtask-text {
    flex: 1;
    transition: all var(--transition-fast);
}

.subtask-text.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

.subtask-remove {
    opacity: 0;
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.subtask-item:hover .subtask-remove {
    opacity: 1;
}

.subtask-remove:hover {
    background-color: var(--danger-color);
    color: white;
}

.add-subtask {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.add-subtask input {
    flex: 1;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.75rem;
}

.add-subtask button {
    padding: 0.25rem 0.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
}

.subtask-progress {
    margin-top: 0.5rem;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.subtask-progress-bar {
    height: 100%;
    background-color: var(--success-color);
    transition: width var(--transition-normal);
}

/* Export Menu */
.export-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-large);
    min-width: 200px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.export-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.export-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.export-option:hover {
    background-color: var(--bg-tertiary);
}

.export-option:first-child {
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
}

.export-option:last-child {
    border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
}

/* Undo Toast */
.undo-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-large);
    border: 1px solid var(--border-color);
    z-index: 2000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.undo-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Time on Tasks */
.task-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.task-time.due-soon {
    color: var(--tag-importante);
}

.task-time.overdue {
    color: var(--danger-color);
}

/* Permission Notification */
.notification-permission {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius-md);
    margin: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.notification-permission button {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.notification-permission button:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Improved Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.task-card {
    animation: slideInUp 0.4s ease;
}

.task-card.new {
    animation: slideInRight 0.5s ease;
}

.priority-indicator {
    animation: none;
}

/* Responsiveness for Advanced Features */
@media (max-width: 768px) {
    .calendar-widget {
        margin: 0.5rem;
        padding: 0.75rem;
    }
    
    .export-menu {
        right: auto;
        left: 0;
        min-width: 180px;
    }
    
    .undo-toast {
        left: 1rem;
        right: 1rem;
        transform: translateY(100px);
    }
    
    .undo-toast.show {
        transform: translateY(0);
    }
}

/* 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(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Accessibility Improvements */
.task-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.calendar-day:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .task-card {
        border-width: 2px;
    }
    
    .priority-indicator {
        border: 1px solid var(--text-primary);
    }
    
    .calendar-day.today {
        border: 2px solid var(--text-primary);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .priority-indicator {
        animation: none;
    }
}