/* ========================================
   RESET & BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Priority Colors */
    --priority-high: #dc2626;
    --priority-medium: #f59e0b;
    --priority-low: #10b981;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* Text */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    /* Borders */
    --border-color: #e5e7eb;
    --border-radius: 8px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        /* Colors - same across modes */
        --primary-color: #6366f1;
        --primary-hover: #818cf8;
        --secondary-color: #9ca3af;
        --success-color: #10b981;
        --danger-color: #f87171;
        --warning-color: #fbbf24;
        --info-color: #60a5fa;
        
        /* Priority Colors - adjusted for dark */
        --priority-high: #ff6b6b;
        --priority-medium: #ffd43b;
        --priority-low: #51cf66;
        
        /* Background - dark theme */
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --bg-tertiary: #0f172a;
        
        /* Text - light for dark bg */
        --text-primary: #f3f4f6;
        --text-secondary: #d1d5db;
        --text-tertiary: #9ca3af;
        
        /* Borders - lighter for dark */
        --border-color: #374151;
        
        /* Shadows - adjusted for dark */
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #3151d3 100%);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    }
}

/* ========================================
   SCREEN MANAGEMENT
   ======================================== */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: flex;
}

/* ========================================
   LOGIN SCREEN
   ======================================== */
#loginScreen {
    justify-content: center;
    align-items: center;
}

.login-container {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.login-container h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.login-container p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1rem;
}

#loginButton {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 500;
}

#loginButton svg {
    width: 21px;
    height: 21px;
}

/* ========================================
   APP SCREEN
   ======================================== */
#appScreen {
    flex-direction: column;
}

.app-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.header-content h1 {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.user-name {
    color: var(--text-primary);
    font-weight: 600;
}

.user-email {
    color: var(--text-secondary);
    font-size: 0.6rem;
}

.view-tabs {
    display: flex;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    border-top: 1px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-btn .count {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.tab-btn.active .count {
    background: var(--primary-color);
    color: white;
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.app-main {
    flex: 1;
    padding: var(--spacing-xl);
    padding-bottom: 70px; /* Space for footer */
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* ========================================
   FOOTER
   ======================================== */
.app-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 90;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

/* ========================================
   ADD TASK SECTION
   ======================================== */
.add-task-section {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-row-extra {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.priority-urgency-row {
    display: flex;
    gap: var(--spacing-md);
}

.priority-urgency-row select {
    flex: 1;
}

.priority-urgency-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.priority-urgency-col label {
    font-weight: 500;
    font-size: 0.9rem;
}

.priority-urgency-col select {
    width: 100%;
}

#taskTitle {
    flex: 2;
}

#taskDueDate {
    flex: 1;
    min-width: 200px;
}

#taskDescription {
    width: 100%;
    resize: vertical;
}

#taskTags {
    flex: 1;
}

/* ========================================
   CONTROLS BAR
   ======================================== */
.controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.search-filter {
    display: flex;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 300px;
}

.search-filter input {
    flex: 2;
}

.search-filter select {
    flex: 1;
    min-width: 150px;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sort-controls label {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

/* ========================================
   TASK LIST
   ======================================== */
.task-list-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    min-height: 400px;
    position: relative;
}

.task-list {
    padding: var(--spacing-md);
}

.task-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    transition: all 0.3s;
    cursor: move;
}

.task-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.task-item.dragging {
    opacity: 0.5;
    transform: scale(0.98);
}

.task-item.drag-over {
    border-color: var(--primary-color);
    border-style: dashed;
    background: rgba(79, 70, 229, 0.05);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-title {
    text-decoration: line-through;
}

.task-drag-handle {
    color: var(--text-tertiary);
    cursor: grab;
    font-size: 1.2rem;
    padding-top: 4px;
}

.task-drag-handle:active {
    cursor: grabbing;
}

.task-checkbox input {
    width: 20px;
    height: 20px;
    cursor: pointer;
    margin-top: 4px;
}

.task-content {
    flex: 1;
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.task-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.task-badges {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.urgency-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.urgency-badge.high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.urgency-badge.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.urgency-badge.low {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

.priority-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.priority-badge.high {
    background: rgba(220, 38, 38, 0.1);
    color: var(--priority-high);
}

.priority-badge.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--priority-medium);
}

.priority-badge.low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--priority-low);
}

.starred-badge {
    font-size: 1.2rem;
    display: none;
}

.task-item.starred .starred-badge {
    display: inline;
}

.task-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    white-space: pre-wrap;
}

.task-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
    font-size: 0.875rem;
}

.task-due {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
}

.task-due svg {
    width: 14px;
    height: 14px;
}

.task-time-left {
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: var(--spacing-xs);
}

.task-time-left.overdue {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.task-time-left.urgent {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.task-time-left.upcoming {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

.task-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.task-tag {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.blocked-badge {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.task-blocked {
    opacity: 0.7;
    border-left: 3px solid var(--danger-color);
}

.task-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.btn-icon svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.btn-star.starred {
    color: #fbbf24;
    background: rgba(251, 191, 36, 0.1);
}

.btn-star.starred svg {
    fill: #fbbf24;
}

.btn-delete:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* ========================================
   EMPTY STATE
   ======================================== */
.empty-state {
    display: none;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state.visible {
    display: block;
}

.empty-state p {
    font-size: 1.125rem;
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
}

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

.modal-header h2 {
    margin: 0;
    color: var(--primary-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
}

.modal-close:hover {
    color: var(--text-primary);
}

#editTaskForm {
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group input:not([type="checkbox"]),
.form-group textarea,
.form-group select {
    width: 100%;
}

.form-group select[multiple] {
    height: 120px;
    padding: var(--spacing-sm);
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ========================================
   FORM ELEMENTS
   ======================================== */
input[type="text"],
input[type="date"],
input[type="datetime-local"],
textarea,
select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all 0.2s;
}

input[type="text"]:focus,
input[type="date"]:focus,
input[type="datetime-local"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ========================================
   BUTTONS
   ======================================== */
button {
    font-family: inherit;
}

.btn-primary,
.btn-secondary,
.btn-add {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-add {
    background: var(--success-color);
    color: white;
    white-space: nowrap;
}

.btn-add:hover {
    background: #059669;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    .header-content {
        padding: var(--spacing-md);
    }
    
    .view-tabs {
        padding: 0 var(--spacing-md);
    }
    
    .app-main {
        padding: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
    }
    
    #taskDueDate {
        min-width: 100%;
    }
    
    .form-controls {
        flex-direction: column;
    }
    
    .controls-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-filter {
        flex-direction: column;
        min-width: 100%;
    }
    
    .task-item {
        flex-wrap: wrap;
    }
    
    .task-actions {
        width: 100%;
        justify-content: flex-end;
        margin-top: var(--spacing-sm);
    }
    
    .header-content h1 {
        font-size: 1.25rem;
    }
    
    .user-meta {
        display: none;
    }
    
    .view-tabs {
        overflow-x: auto;
    }
    
    .tab-btn {
        font-size: 0.875rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .login-container h1 {
        font-size: 2rem;
    }
    
    .task-drag-handle {
        display: none;
    }
    
    .task-item {
        cursor: default;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.hidden {
    display: none !important;
}
/* ========================================
   MATRIX VIEW
   ======================================== */
.matrix-view {
    margin-top: var(--spacing-xl);
}

.matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: var(--spacing-md);
    min-height: 600px;
}

.matrix-quadrant {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: border-color 0.2s, background 0.2s;
}

.matrix-quadrant.drag-over {
    border-color: var(--primary-color);
    background: rgba(79,70,229,0.05);
}

.matrix-header {
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.matrix-header-title {
    flex: 1;
}

.matrix-header-action {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    letter-spacing: 0.5px;
}

.matrix-body {
    flex: 1;
    padding: var(--spacing-sm);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.matrix-task {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: grab;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.matrix-task.dragging {
    opacity: 0.5;
}

.matrix-task:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.matrix-task-title {
    font-size: 0.85rem;
    font-weight: 600;
}

.matrix-task-badges {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.matrix-badge {
    font-size: 0.625rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    text-transform: uppercase;
}

.matrix-badge.priority-high { background: rgba(220,38,38,0.1); color: var(--priority-high); }
.matrix-badge.priority-medium { background: rgba(245,158,11,0.1); color: var(--priority-medium); }
.matrix-badge.priority-low { background: rgba(16,185,129,0.15); color: var(--priority-low); }
.matrix-badge.urgency-high { background: rgba(239,68,68,0.12); color: var(--danger-color); }
.matrix-badge.urgency-medium { background: rgba(245,158,11,0.12); color: var(--warning-color); }
.matrix-badge.urgency-low { background: rgba(59,130,246,0.12); color: var(--info-color); }
.matrix-badge.starred { background: rgba(251,191,36,0.15); color: #b45309; }

.matrix-empty {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
}

.matrix-hint {
    margin-top: var(--spacing-md);
    font-size: 0.75rem;
    text-align: center;
    color: var(--text-tertiary);
}

@media (max-width: 900px) {
    .matrix-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, auto);
    }
}

.text-muted {
    color: var(--text-secondary);
}

.text-danger {
    color: var(--danger-color);
}

.text-success {
    color: var(--success-color);
}

/* ========================================
   BUTTON VARIANTS
   ======================================== */
.btn-icon-text {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.btn-icon-text:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ========================================
   TAG INPUT COMPONENT
   ======================================== */
.tag-input-container {
    position: relative;
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    padding: var(--spacing-xs);
    min-height: 42px;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    align-items: center;
}

.tag-input-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tag-input-container input {
    border: none;
    outline: none;
    flex: 1;
    min-width: 120px;
    padding: var(--spacing-xs);
    font-size: 1rem;
    background: transparent;
}

.tag-input-container input:focus {
    box-shadow: none;
}

.selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

.tag-pill-remove {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.tag-pill-remove:hover {
    background: rgba(79, 70, 229, 0.2);
}

.tag-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    display: none;
    box-shadow: var(--shadow-md);
    margin-top: 2px;
}

.tag-suggestions.active {
    display: block;
}

.tag-suggestion-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.tag-suggestion-item.selected {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    font-weight: 500;
}

.tag-count {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 10px;
}

/* ========================================
   TAG MANAGEMENT MODAL
   ======================================== */
.tag-management-content {
    padding: var(--spacing-lg);
}

.tag-management-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.tag-management-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 500px;
    overflow-y: auto;
}

.tag-management-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.2s;
}

.tag-management-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.tag-management-item.editing {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tag-management-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.tag-management-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.tag-management-name.predefined {
    color: var(--primary-color);
}

.tag-management-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.tag-management-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
}

.tag-management-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.tag-management-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

.tag-management-btn:hover {
    background: var(--bg-tertiary);
}

.tag-management-btn.edit {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.tag-management-btn.edit:hover {
    background: rgba(79, 70, 229, 0.1);
}

.tag-management-btn.delete {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.tag-management-btn.delete:hover {
    background: rgba(239, 68, 68, 0.1);
}

.tag-management-btn.save {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tag-management-btn.save:hover {
    background: var(--primary-hover);
}

.tag-management-btn.cancel {
    color: var(--text-secondary);
}

.tag-management-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   CALENDAR VIEW
   ======================================== */
.calendar-view {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.calendar-nav-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
    font-size: 0.9rem;
}

.calendar-nav-btn:hover {
    background: var(--primary-hover);
}

.calendar-month-year {
    font-size: 1.25rem;
    color: var(--text-primary);
    min-width: 180px;
    text-align: center;
    margin: 0;
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 6px;
    flex-shrink: 0;
}

.calendar-weekday {
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 6px 2px;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    flex: 1;
    overflow: hidden;
}

.calendar-day {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    padding: 6px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: border-color 0.2s, background 0.2s;
    overflow: hidden;
}

.calendar-day:hover {
    border-color: var(--primary-color);
}

.calendar-day.other-month {
    background: var(--bg-tertiary);
    opacity: 0.5;
}

.calendar-day.today {
    border: 2px solid var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

/* ========================================
   ARCHIVE VIEW
   ======================================== */
.archive-view {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
}

.archive-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.archive-header h2 {
    color: var(--text-primary);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.archive-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

#archiveList {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

#emptyArchiveState {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    min-height: 300px;
}

#emptyArchiveState svg {
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

#emptyArchiveState p {
    font-size: 1.1rem;
    margin: 0;
}

.archived-task {
    opacity: 0.85;
    background: var(--bg-secondary);
    border-left: 3px solid var(--text-tertiary);
}

.archived-task .task-title {
    color: var(--text-secondary);
}

.archived-task:hover {
    opacity: 1;
    border-color: var(--primary-color);
}

/* ========================================
   KANBAN VIEW
   ======================================== */
.kanban-view {
    padding: var(--spacing-md);
    height: calc(100vh - 160px);
    overflow: hidden;
}

.kanban-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    height: 100%;
    overflow: hidden;
}

.kanban-column {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    min-height: 0;
    box-shadow: var(--shadow-sm);
}

.kanban-column-header {
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.kanban-column-header h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin: 0;
    font-weight: 600;
}

.kanban-column-header.blocked-header h3 {
    color: var(--danger-color);
}

.kanban-column-header.completed-header h3 {
    color: var(--success-color);
}

.kanban-count {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    min-width: 24px;
    text-align: center;
}

.kanban-column-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-height: 100px;
}

.kanban-column-content.drag-over {
    background: rgba(79, 70, 229, 0.1);
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius);
}

.kanban-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    cursor: grab;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

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

.kanban-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.kanban-card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    line-height: 1.3;
}

.kanban-card-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.kanban-card-badges {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.kanban-badge {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kanban-badge.priority-high {
    background: rgba(220, 38, 38, 0.1);
    color: var(--priority-high);
}

.kanban-badge.priority-medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--priority-medium);
}

.kanban-badge.priority-low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--priority-low);
}

.kanban-badge.urgency-high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.kanban-badge.urgency-low {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
}

.kanban-badge.starred {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.kanban-badge.blocked {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    cursor: help;
}

/* Responsive Kanban */
@media (max-width: 1400px) {
    .kanban-board {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .kanban-board {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .kanban-column-content {
        max-height: 400px;
    }
}

.calendar-day.drag-over {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.1);
    border-style: dashed;
}

.calendar-day-header {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 0.8rem;
    line-height: 1;
}

.calendar-day-header.other-month {
    color: var(--text-tertiary);
}

.calendar-day-tasks {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 0;
}

.calendar-day-tasks::-webkit-scrollbar {
    width: 4px;
}

.calendar-day-tasks::-webkit-scrollbar-track {
    background: transparent;
}

.calendar-day-tasks::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.calendar-task {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 3px 4px;
    font-size: 0.65rem;
    cursor: grab;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: box-shadow 0.2s, border-color 0.2s;
    display: flex;
    align-items: center;
    gap: 3px;
    flex-shrink: 0;
}

.calendar-task:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.calendar-task.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.calendar-task-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.calendar-task-indicator {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    flex-shrink: 0;
}

.calendar-task.priority-high .calendar-task-indicator {
    background: var(--priority-high);
}

.calendar-task.priority-low .calendar-task-indicator {
    background: var(--priority-low);
}

.calendar-task.urgency-high {
    border-left: 2px solid var(--danger-color);
}

@media (max-width: 1200px) {
    .calendar-grid {
        gap: 3px;
    }
    
    .calendar-day {
        padding: 4px;
    }
    
    .calendar-task {
        font-size: 0.6rem;
        padding: 2px 3px;
    }
}

@media (max-width: 768px) {
    .calendar-header {
        flex-direction: column;
        gap: 8px;
    }
    
    .calendar-grid {
        gap: 2px;
    }
    
    .calendar-day {
        padding: 3px;
    }
    
    .calendar-weekday {
        font-size: 0.65rem;
        padding: 3px 1px;
    }
    
    .calendar-task {
        font-size: 0.55rem;
        padding: 1px 2px;
    }
}

/* ================= Subtasks ================= */

.subtasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.subtasks-header label {
    font-weight: 600;
    color: var(--text-primary);
}

.btn-add-subtask {
    padding: 4px 8px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.btn-add-subtask:hover {
    background: var(--primary-hover);
}

.subtasks-list {
    width: 100%;
    margin-bottom: var(--spacing-md);
    margin-left: -var(--spacing-md);
    margin-right: -var(--spacing-md);
    max-height: 300px;
    overflow-y: auto;
    box-sizing: border-box;
    padding: 0 var(--spacing-md);
}

.subtask-item {
    display: flex;
    align-items: center;
    min-width: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-secondary);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    border-left: 3px solid var(--primary-color);
    transition: all 0.2s;
    box-sizing: border-box;
    cursor: grab;
}

.subtask-item:active {
    cursor: grabbing;
}

.subtask-item.dragging {
    opacity: 0.5;
    background: #f0f0f0;
}

.subtask-item.drag-over {
    border-top: 2px solid var(--primary-color);
    padding-top: calc(var(--spacing-sm) - 2px);
}

.subtask-item.completed {
    opacity: 0.6;
    border-left-color: var(--success-color);
}

.subtask-item.completed .subtask-title {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.subtask-checkbox {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    min-width: 16px;
    margin-right: 8px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.subtask-title {
    flex: 1;
    min-width: 0;
    color: var(--text-primary);
    font-size: 0.95rem;
    word-break: break-word;
    overflow-wrap: break-word;
    margin-right: var(--spacing-md);
}

.btn-delete-subtask {
    flex-shrink: 0;
    padding: 4px 8px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.subtask-item:hover .btn-delete-subtask {
    opacity: 1;
}

.btn-delete-subtask:hover {
    background: var(--danger-hover);
}

.subtask-new-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--background-primary);
    color: var(--text-primary);
    box-sizing: border-box;
    transition: border 0.2s;
}

.subtask-new-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.empty-subtasks {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-md);
    font-style: italic;
    font-size: 0.9rem;
}

.subtasks-badge {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 4px;
}

/* Dark mode for subtasks */
@media (prefers-color-scheme: dark) {
    .subtask-item {
        background: #1f2937;
        border-left-color: var(--primary-color);
    }
    
    .subtask-item.dragging {
        background: #111827;
    }
    
    .subtask-item.completed {
        border-left-color: var(--success-color);
    }
    
    .subtask-new-input {
        background: #111827;
        color: #f3f4f6;
        border-color: #374151;
    }
    
    .btn-delete-subtask {
        background: #ef4444;
    }
    
    .btn-delete-subtask:hover {
        background: #dc2626;
    }
}

@media (max-width: 768px) {
    .subtasks-list {
        max-height: 250px;
    }
    
    .subtask-item {
        padding: 8px 12px;
    }
    
    .btn-delete-subtask {
        opacity: 0.7;
    }
}

/* Comments Section */
.comments-list {
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
    max-height: 300px;
    overflow-y: auto;
    background: #fafafa;
}

.comment-item {
    display: flex;
    flex-direction: column;
    padding: 12px;
    margin-bottom: 8px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    position: relative;
}

.comment-item:last-child {
    margin-bottom: 0;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 12px;
}

.comment-author {
    font-weight: 600;
    color: #374151;
}

.comment-time {
    color: #9ca3af;
    font-size: 11px;
}

.comment-content {
    color: #1f2937;
    font-size: 13px;
    line-height: 1.5;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.btn-delete-comment {
    position: absolute;
    top: 8px;
    right: 8px;
    background: #ef4444;
    color: white;
    border: none;
    padding: 4px 6px;
    border-radius: 3px;
    cursor: pointer;
    display: none;
    font-size: 12px;
}

.comment-item:hover .btn-delete-comment {
    display: block;
}

.btn-delete-comment:hover {
    background: #dc2626;
}

.comment-input-wrapper {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.comment-new-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    resize: vertical;
    background: white;
    color: #1f2937;
}

.comment-new-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.comment-new-input::placeholder {
    color: #9ca3af;
}

/* Task Preview Tooltip */
.task-preview {
    position: fixed;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 12px;
    max-width: 300px;
    font-size: 13px;
    z-index: 1000;
    pointer-events: none;
    animation: slideIn 0.2s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preview-title {
    font-weight: 600;
    color: #111827;
    margin: 0;
    word-break: break-word;
}

.preview-description {
    color: #4b5563;
    margin: 0;
    max-height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    word-break: break-word;
}

.preview-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 4px;
    border-top: 1px solid #e5e7eb;
    padding-top: 8px;
}

.preview-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.preview-label {
    font-weight: 500;
    color: #6b7280;
    min-width: 70px;
}

.preview-priority,
.preview-urgency {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.preview-priority.high,
.preview-urgency.high {
    background: #fee2e2;
    color: #991b1b;
}

.preview-priority.medium,
.preview-urgency.medium {
    background: #fef3c7;
    color: #92400e;
}

.preview-priority.low,
.preview-urgency.low {
    background: #dcfce7;
    color: #166534;
}

.preview-duedate {
    color: #374151;
}

.preview-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.preview-tags .tag {
    background: #f0f0f0;
    color: #374151;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    white-space: nowrap;
}

.preview-subtasks,
.preview-comments {
    color: #374151;
    font-weight: 500;
}

@media (prefers-color-scheme: dark) {
    .task-preview {
        background: #1f2937;
        border-color: #374151;
        box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    }
    
    .preview-title {
        color: #f3f4f6;
    }
    
    .preview-description {
        color: #d1d5db;
    }
    
    .preview-label {
        color: #9ca3af;
    }
    
    .preview-meta {
        border-top-color: #374151;
    }
    
    .preview-priority.high,
    .preview-urgency.high {
        background: #7f1d1d;
        color: #fecaca;
    }
    
    .preview-priority.medium,
    .preview-urgency.medium {
        background: #78350f;
        color: #fed7aa;
    }
    
    .preview-priority.low,
    .preview-urgency.low {
        background: #166534;
        color: #86efac;
    }
    
    .preview-duedate {
        color: #e5e7eb;
    }
    
    .preview-tags .tag {
        background: #374151;
        color: #e5e7eb;
    }
    
    .preview-subtasks,
    .preview-comments {
        color: #e5e7eb;
    }
}

@media (prefers-color-scheme: dark) {
    .comments-list {
        background: #111827;
        border-color: #374151;
    }
    
    .comment-item {
        background: #1f2937;
        border-color: #374151;
    }
    
    .comment-author {
        color: #e5e7eb;
    }
    
    .comment-time {
        color: #9ca3af;
    }
    
    .comment-content {
        color: #f3f4f6;
    }
    
    .comment-new-input {
        background: #111827;
        color: #f3f4f6;
        border-color: #374151;
    }
    
    .comment-new-input:focus {
        border-color: var(--primary-color);
    }
    
    .comment-new-input::placeholder {
        color: #6b7280;
    }
}