/* CSS Reset and Variables */
:root {
    /* Light Theme Colors */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --purple-color: #8b5cf6;
    
    /* Neutral Colors */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-color: rgba(99, 102, 241, 0.1);
    
    /* Gradients */
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-2: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-3: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-4: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(99, 102, 241, 0.12);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Dark Theme Variables */
.dark-theme {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal);
    overflow-x: hidden;
}

/* Background Shapes */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.15;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -200px;
    right: -200px;
    animation: float 20s infinite ease-in-out;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -150px;
    left: -150px;
    animation: float 25s infinite ease-in-out reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--warning-color);
    top: 50%;
    left: 10%;
    animation: float 15s infinite ease-in-out;
}

.shape-4 {
    width: 150px;
    height: 150px;
    background: var(--danger-color);
    bottom: 20%;
    right: 10%;
    animation: float 18s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -50px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 300px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    box-shadow: var(--shadow-lg);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo span {
    color: var(--primary-color);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 4px;
}

/* Search Bar */
.search-bar {
    position: relative;
    flex: 2;
    max-width: 400px;
    min-width: 250px;
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
    z-index: 2;
}

.search-bar input {
    width: 100%;
    padding: 12px 45px 12px 45px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--card-bg);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

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

.clear-search {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: none;
}

.clear-search:hover {
    color: var(--danger-color);
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg);
    padding: 10px 15px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.theme-toggle i {
    color: var(--text-secondary);
    font-size: 18px;
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch label {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-fast);
    border-radius: 34px;
}

.toggle-switch label:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
}

.toggle-switch input:checked + label {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + label:before {
    transform: translateX(24px);
}

/* Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 25px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gradient-1 {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.gradient-2 {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.gradient-3 {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.gradient-4 {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    margin-bottom: 20px;
}

.gradient-1 .stat-icon {
    background: var(--gradient-1);
}

.gradient-2 .stat-icon {
    background: var(--gradient-2);
}

.gradient-3 .stat-icon {
    background: var(--gradient-3);
}

.gradient-4 .stat-icon {
    background: var(--gradient-4);
}

.stat-info h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-wave {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
    border-radius: 50%;
    opacity: 0.3;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

@media (max-width: 1100px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-normal);
}

.card:hover {
    transform: translateY(-3px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.card-header i {
    color: var(--primary-color);
    font-size: 20px;
}

.card-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

/* Forms */
.form-card {
    margin-bottom: 25px;
}

.form-card form {
    padding: 25px;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
    z-index: 2;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 14px 15px 14px 45px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.input-group textarea {
    min-height: 100px;
    resize: vertical;
}

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

.input-group input:focus + i,
.input-group select:focus + i,
.input-group textarea:focus + i {
    color: var(--primary-color);
}

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

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

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

.checkbox-group label {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Buttons */
.btn {
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all var(--transition-fast);
    width: 100%;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 16px;
    font-size: 0.9rem;
}

/* Categories */
.categories-card {
    height: 300px;
    display: flex;
    flex-direction: column;
}

.categories-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.category-item:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(5px);
}

.category-name {
    font-weight: 500;
    color: var(--text-primary);
}

.category-count {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.empty-categories {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-categories i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* Tasks Section */
.tasks-section {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.tasks-header {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 25px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 20px;
}

.header-left > div:first-child {
    flex: 1;
    min-width: 200px;
}

.header-left h2 {
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.header-left h2 i {
    color: var(--primary-color);
}

.task-actions-header {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.today-date {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-weight: 500;
    width: fit-content;
}

.filter-controls {
    margin-top: 15px;
}

.filter-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Tasks Container */
.tasks-container {
    min-height: 400px;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 25px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.task-card.completed {
    opacity: 0.8;
    background: rgba(16, 185, 129, 0.05);
}

.task-card.high-priority {
    border-left: 4px solid var(--danger-color);
}

.task-card.medium-priority {
    border-left: 4px solid var(--warning-color);
}

.task-card.low-priority {
    border-left: 4px solid var(--secondary-color);
}

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

.task-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.task-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    transform: scale(1.1);
}

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

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

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

.task-details {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 15px;
}

.task-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.task-subject {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

.task-description {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.5;
}

.task-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.due-date {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

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

.due-date.today {
    color: var(--warning-color);
}

.due-date.upcoming {
    color: var(--secondary-color);
}

.priority-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

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

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

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

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

.empty-state-icon {
    width: 100px;
    height: 100px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 3rem;
    color: var(--primary-color);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

/* Quick Stats */
.quick-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.stat-item {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.stat-label {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 10px;
}

.progress-bar {
    height: 10px;
    background: var(--border-color);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 5px;
    transition: width var(--transition-slow);
}

.stat-value {
    font-weight: 700;
    color: var(--text-primary);
    float: right;
}

.deadline-list {
    min-height: 80px;
}

.deadline-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.deadline-item:last-child {
    border-bottom: none;
}

.deadline-task {
    font-weight: 500;
    color: var(--text-primary);
}

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

.no-deadlines {
    text-align: center;
    color: var(--text-muted);
    padding: 20px;
    font-style: italic;
}

/* Footer */
.footer {
    text-align: center;
    padding: 25px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
}

.footer p {
    margin-bottom: 15px;
}

.footer i {
    color: var(--danger-color);
    margin: 0 5px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-link {
    background: none;
    border: none;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-fast);
    cursor: pointer;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

.footer-link:hover {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

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

#edit-task-form {
    padding: 25px;
}

.modal-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.modal-actions .btn {
    flex: 1;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1001;
    animation: slideInRight 0.3s ease-out, fadeOut 0.3s ease-out 2.7s forwards;
    border-left: 4px solid var(--primary-color);
    max-width: 350px;
}

.notification.success {
    border-left-color: var(--secondary-color);
}

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification.info {
    border-left-color: var(--info-color);
}

.notification.error {
    border-left-color: var(--danger-color);
}

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

/* Confetti Canvas */
#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
}

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

::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .logo, .search-bar {
        width: 100%;
        max-width: 100%;
    }
    
    .dashboard {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .filter-btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
    }
    
    .quick-stats {
        grid-template-columns: 1fr;
    }
    
    .task-actions-header {
        width: 100%;
        justify-content: flex-start;
    }
    
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}

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

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

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

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

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

.task-card {
    animation: slideIn 0.3s ease-out;
}

/* Tasks Grid */
.tasks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

@media (max-width: 768px) {
    .tasks-grid {
        grid-template-columns: 1fr;
    }
}