/* ===== CSS Variables ===== */
:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #7c8ff5;
    --secondary: #764ba2;
    --accent: #f093fb;
    --success: #48bb78;
    --warning: #ed8936;
    --danger: #f56565;
    --info: #4299e1;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-hover: rgba(102, 126, 234, 0.1);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(148, 163, 184, 0.1);
    --border-light: rgba(148, 163, 184, 0.2);
    
    --shadow: 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);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --sidebar-width: 280px;
    --header-height: 70px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-hover: rgba(102, 126, 234, 0.05);
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: rgba(148, 163, 184, 0.2);
    --border-light: rgba(148, 163, 184, 0.3);
    
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: var(--transition);
}

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

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-toggle, .menu-toggle {
    background: var(--bg-hover);
    border: none;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: none;
}

.sidebar-toggle:hover, .menu-toggle:hover {
    background: var(--bg-hover);
    transform: scale(1.05);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 30px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    font-size: 0.95rem;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
}

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

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.sidebar-section {
    margin-bottom: 25px;
}

.sidebar-section h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
    padding: 0 8px;
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.category-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.category-item.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.category-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
}

.category-count {
    margin-left: auto;
    font-size: 0.8rem;
    background: var(--bg-hover);
    padding: 2px 8px;
    border-radius: 10px;
}

.add-category-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: transparent;
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    font-size: 0.9rem;
}

.add-category-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.priority-filters {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.priority-filter {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.priority-filter:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.priority-filter.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.priority-filter i {
    width: 20px;
}

.priority-filter[data-priority="high"] i { color: var(--danger); }
.priority-filter[data-priority="medium"] i { color: var(--warning); }
.priority-filter[data-priority="low"] i { color: var(--success); }

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.theme-toggle, .ai-settings-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    font-size: 0.95rem;
}

.theme-toggle:hover, .ai-settings-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 20px 30px;
    min-height: 100vh;
    transition: var(--transition);
}

.main-content.expanded {
    margin-left: 0;
}

/* ===== Header ===== */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 10px 20px;
    min-width: 300px;
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--bg-hover);
}

.search-box i {
    color: var(--text-muted);
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    width: 100%;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.stats-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stats-badge span:first-child {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stats-badge span:last-child {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.add-task-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: var(--radius-xl);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

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

/* ===== Views ===== */
.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Dashboard ===== */
.dashboard-header {
    margin-bottom: 30px;
}

.dashboard-header h2 {
    font-size: 2rem;
    margin-bottom: 5px;
}

.dashboard-header p {
    color: var(--text-secondary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-light);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-icon.total {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.stat-icon.pending {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
}

.stat-icon.completed {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
    color: white;
}

.stat-icon.overdue {
    background: linear-gradient(135deg, #fa709a, #fee140);
    color: white;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Progress Section */
.progress-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-bottom: 30px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.progress-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.progress-header span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
}

.progress-bar {
    height: 10px;
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 0.5s ease;
    width: 0%;
}

.progress-stats {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tasks Section */
.tasks-section {
    margin-bottom: 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.view-all-btn {
    background: transparent;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.view-all-btn:hover {
    text-decoration: underline;
}

/* Tasks List */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
}

.task-card:hover {
    transform: translateX(5px);
    border-color: var(--border-light);
    box-shadow: var(--shadow);
}

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

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

.task-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-light);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.task-checkbox:hover {
    border-color: var(--primary);
}

.task-checkbox.checked {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: var(--primary);
}

.task-checkbox.checked i {
    color: white;
    font-size: 0.8rem;
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.task-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-priority {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.task-priority.high {
    background: rgba(245, 101, 101, 0.2);
    color: var(--danger);
}

.task-priority.medium {
    background: rgba(237, 137, 54, 0.2);
    color: var(--warning);
}

.task-priority.low {
    background: rgba(72, 187, 120, 0.2);
    color: var(--success);
}

.task-category {
    display: flex;
    align-items: center;
    gap: 5px;
}

.category-badge {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.task-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: var(--transition);
}

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

.task-action-btn {
    width: 35px;
    height: 35px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--bg-hover);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

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

/* AI Suggestions */
.ai-suggestions {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
}

.ai-suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 15px;
}

.ai-suggestion-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.ai-suggestion-card:hover {
    border-color: var(--primary);
}

.ai-suggestion-card i {
    font-size: 1.5rem;
    color: var(--primary);
}

.ai-suggestion-content {
    flex: 1;
}

.ai-suggestion-content h4 {
    font-size: 0.95rem;
    margin-bottom: 3px;
}

.ai-suggestion-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ai-suggestion-action {
    padding: 8px 16px;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.ai-suggestion-action:hover {
    background: var(--primary-dark);
}

/* ===== View Headers ===== */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.view-header h2 {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sort-select {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 30px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-small {
    max-width: 450px;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: var(--bg-hover);
    border: none;
    color: var(--text-secondary);
    width: 35px;
    height: 35px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

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

/* ===== Forms ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--bg-hover);
}

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

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.form-group small a {
    color: var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Color Picker */
.color-picker {
    display: flex;
    align-items: center;
    gap: 15px;
}

.color-picker input[type="color"] {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    background: transparent;
}

.color-presets {
    display: flex;
    gap: 8px;
}

.color-preset {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.color-preset:hover {
    transform: scale(1.1);
}

.color-preset.selected {
    border-color: var(--text-primary);
}

/* Subtasks */
.subtasks-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
}

.subtask-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
}

.subtask-item input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
}

.subtask-remove {
    background: transparent;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 5px;
}

.add-subtask-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: var(--bg-hover);
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Form Actions */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 25px;
}

.btn-cancel {
    padding: 12px 24px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-edit {
    padding: 12px 24px;
    background: var(--info);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.btn-delete {
    padding: 12px 24px;
    background: var(--danger);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.task-details-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* ===== Task Details ===== */
.task-details-content {
    padding: 20px 0;
}

.detail-row {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.detail-item {
    flex: 1;
    padding: 15px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
}

.detail-item label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.detail-item span {
    font-weight: 600;
}

.detail-description {
    padding: 15px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.detail-description label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
        padding: 15px;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-toggle, .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .add-task-btn span {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .task-meta {
        flex-wrap: wrap;
    }
    
    .task-actions {
        opacity: 1;
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .task-card {
        position: relative;
        padding-right: 50px;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 10px;
}

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

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    animation: slideInRight 0.3s ease;
    min-width: 300px;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.info {
    border-left: 4px solid var(--info);
}

.toast i {
    font-size: 1.2rem;
}

.toast.success i { color: var(--success); }
.toast.error i { color: var(--danger); }
.toast.warning i { color: var(--warning); }
.toast.info i { color: var(--info); }

.toast-message {
    flex: 1;
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 5px;
}