* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #9f7aea;
    --danger-color: #e53e3e;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* Light Theme */
.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --task-bg: #ffffff;
}

/* Dark Theme */
.dark-theme {
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-tertiary: #cbd5e0;
    --border-color: #4a5568;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --task-bg: #2d3748;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: var(--transition);
}

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

/* Header Styles */
header {
    background: var(--bg-primary);
    padding: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
}


.task-counter {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: normal;
    display: inline-block;
    white-space: nowrap;
    margin-left: 0.5rem;
}

.board-selector-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#boardSelector {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    min-width: 200px;
    cursor: pointer;
}


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

.icon-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.75rem;
    cursor: pointer;
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    min-width: 40px;
    min-height: 40px;
}

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

/* Dropdown Menu */
.dropdown-menu {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    padding: 0.5rem;
    z-index: 1000;
    min-width: 150px;
}

.dropdown-menu.show {
    display: flex;
}

.dropdown-menu button {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    text-align: left;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-menu button:hover {
    background: var(--bg-secondary);
}

.dropdown-menu button.danger {
    color: var(--danger-color);
}

.dropdown-menu .menu-separator {
    margin: 0.25rem 0;
    border: none;
    border-top: 1px solid var(--border-color);
}

/* Search Bar */
.search-container {
    background: var(--bg-primary);
    padding: 1rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    box-shadow: var(--shadow);
}

#searchInput {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}

/* Boards/Lists Container */
.boards-container {
    flex: 1;
    padding: 1rem;
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    align-items: flex-start;
}

/* Empty State */
.empty-state {
    width: 100%;
    text-align: center;
    padding: 3rem;
    color: var(--text-tertiary);
}

.empty-state i {
    margin-bottom: 1rem;
}

.empty-state h2, .empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.empty-state p {
    margin-bottom: 1.5rem;
}

/* Board/List Styles */
.board {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    min-width: 300px;
    max-width: 350px;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 200px);
}

.board-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: move;
}

.add-task-quick {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    font-size: 1.25rem;
    font-weight: bold;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.add-task-quick:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.board-title {
    flex: 1;
    text-align: center;
    font-weight: 600;
    font-size: 1.125rem;
}

.board-actions {
    display: flex;
    gap: 0.25rem;
}

.board-actions button {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.25rem;
    transition: var(--transition);
}

.board-actions button:hover {
    transform: scale(1.2);
}


/* Tasks Container */
.tasks-container {
    padding: 1rem;
    min-height: 100px;
    overflow-y: auto;
    flex: 1;
}

.task {
    background: var(--task-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    margin-bottom: 0.75rem;
    cursor: move;
    transition: var(--transition);
    position: relative;
}

/* Override inline styles for tasks in dark mode */
.dark-theme .task {
    background: var(--task-bg) !important;
    color: var(--text-primary) !important;
}

/* Override only when colors are default (white bg, black text) */
.dark-theme .task[style*="background-color: rgb(255, 255, 255)"][style*="color: rgb(0, 0, 0)"] {
    background: var(--task-bg) !important;
    color: var(--text-primary) !important;
}

.dark-theme .task[style*="background-color: #FFFFFF"][style*="color: #000000"] {
    background: var(--task-bg) !important;
    color: var(--text-primary) !important;
}

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

.task.highlighted {
    border-color: var(--warning-color);
    box-shadow: 0 0 0 3px rgba(237, 137, 54, 0.2);
}

.task-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: var(--transition);
}

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

.task-actions button {
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.task-actions button:hover {
    background: var(--primary-color);
    color: white;
}

/* Attachment indicator - always visible in top-left */
.attachment-indicator {
    position: absolute;
    top: 0.25rem;
    left: 0.5rem;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1;
}

.attachment-indicator:hover {
    background: var(--primary-color);
    color: white;
}

.attachment-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger-color);
    color: white;
    font-size: 0.65rem;
    font-weight: bold;
    padding: 0.125rem 0.25rem;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
    line-height: 1;
}

/* Attachments dropdown menu */
.attachments-dropdown {
    max-width: 300px;
    max-height: 400px;
    overflow-y: auto;
}

.attachments-dropdown .menu-header {
    padding: 0.5rem 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.attachments-dropdown .attachment-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.attachments-dropdown .attachment-item i {
    min-width: 16px;
    text-align: center;
}

.attachments-dropdown .menu-separator {
    margin: 0.25rem 0;
    border: none;
    border-top: 1px solid var(--border-color);
}

.task-content {
    line-height: 1.5;
}

/* Add padding when task has attachments to prevent overlap */
.task.has-attachment .task-content {
    padding-left: 2.5rem;
}

.task-content h1, .task-content h2, .task-content h3,
.task-content h4, .task-content h5, .task-content h6 {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

.task-content p {
    margin-bottom: 0.5rem;
}

.task-content ul, .task-content ol {
    margin-left: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Reduce list indentation on mobile */
@media (max-width: 768px) {
    .task-content ul, .task-content ol {
        margin-left: 1rem;
    }
}

.task-content code {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.25rem;
    border-radius: 4px;
    font-size: 0.875rem;
}

.task-content pre {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: 0.5rem;
}

.task-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.task-content a:hover {
    text-decoration: underline;
}

/* Links in dark mode tasks */
.dark-theme .task-content a {
    color: #9f7aea !important;
    text-decoration: underline;
}

.dark-theme .task-content a:hover {
    color: #b794f4 !important;
}

/* Search highlighting within tasks */
.search-highlight {
    background-color: #ffeb3b !important;
    color: #000 !important;
    padding: 0 2px;
    border-radius: 2px;
    font-weight: 600;
}

/* Darker yellow for dark mode */
.dark-theme .search-highlight {
    background-color: #ffc107 !important;
    color: #000 !important;
}

/* Sortable Placeholder */
.ui-sortable-placeholder {
    border: 2px dashed var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    visibility: visible !important;
    margin-bottom: 0.75rem;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.modal-content input[type="text"],
.modal-content textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.modal-content textarea {
    resize: vertical;
    min-height: 100px;
}

.color-picker {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.color-picker label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.color-picker input[type="color"] {
    width: 50px;
    height: 35px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
}

.file-upload {
    margin-bottom: 1rem;
}

.file-upload-btn {
    display: inline-block;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.file-upload-btn:hover {
    background: var(--primary-color);
    color: white;
}

.attached-file {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
}

.attached-file a {
    color: var(--primary-color);
    text-decoration: none;
}

.attached-file a:hover {
    text-decoration: underline;
}

.attached-file button {
    background: transparent;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.25rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--secondary-color);
}

.btn-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-cancel:hover {
    background: var(--bg-secondary);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-danger:hover {
    background: #c53030;
}

/* Board selection list in modal */
.board-list {
    max-height: 300px;
    overflow-y: auto;
    margin: 1rem 0;
}

.board-option {
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

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

.board-option input[type="radio"] {
    margin-right: 0.5rem;
}

.board-option label {
    display: flex;
    align-items: center;
    cursor: pointer;
    width: 100%;
}

.board-meta-info {
    margin-left: auto;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: stretch;
        padding: 0.5rem;
    }
    
    .header-left {
        width: 100%;
    }
    
    .header-actions {
        justify-content: center;
    }
    
    #boardSelector {
        width: 100%;
    }
    
    /* Remove padding on mobile for maximum width */
    .boards-container {
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        gap: 0;
    }
    
    .board {
        max-width: none;
        width: 100%;
        border-radius: 0;
        box-shadow: none;
        margin-bottom: 1px;
    }
    
    .board-header {
        border-radius: 0;
        padding: 0.75rem 0.5rem;
    }
    
    /* Reduce task container padding */
    .tasks-container {
        padding: 0.5rem 0.25rem;
    }
    
    /* Optimize task padding for more content space */
    .task {
        padding: 0.5rem 0.75rem;
        margin-bottom: 0.5rem;
        margin-left: 0.25rem;
        margin-right: 0.25rem;
    }
    
    /* Adjust attachment indicator position for reduced padding */
    .task.has-attachment .task-content {
        padding-left: 2rem;
    }
    
    .attachment-indicator {
        left: 0.25rem;
    }
    
    /* Reduce search container padding */
    .search-container {
        padding: 0.5rem;
        gap: 0.5rem;
    }
    
    #searchInput {
        padding: 0.5rem;
    }
    
    .modal-content {
        width: 95%;
        padding: 1.5rem;
    }
    
    /* Ensure icons remain touch-friendly */
    .icon-btn {
        min-width: 40px;
        min-height: 40px;
    }
    
    /* Reduce empty state padding */
    .empty-state {
        padding: 2rem 1rem;
    }
}