/* CSS Variables for Theme */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-hover: #e5e7eb;
    
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --transition: all 0.3s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #374151;
    --bg-hover: #4b5563;
    
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

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

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.theme-toggle i {
    font-size: 20px;
    color: var(--text-primary);
}

[data-theme="light"] #moonIcon {
    display: none;
}

[data-theme="dark"] #sunIcon {
    display: none;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 30px 20px;
    border-bottom: 1px solid var(--border-color);
}

.app-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-logo i {
    font-size: 28px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 10px;
    overflow-y: auto;
}

.nav-item {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 5px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

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

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

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

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 30px;
    max-width: 1400px;
    width: 100%;
}

/* View Management */
.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);
    }
}

/* View Header */
.view-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.view-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.view-subtitle {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-icon {
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

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

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

.btn-icon {
    padding: 8px;
    background: transparent;
    color: var(--text-secondary);
}

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

.btn-primary.large,
.btn-secondary.large {
    padding: 14px 28px;
    font-size: 16px;
}

/* Cards */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h3 {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.stats-row {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-icon.orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-icon.red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-content p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Daily Goals */
.goals-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.goal-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.goal-item:hover {
    background: var(--bg-tertiary);
}

.goal-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.goal-item span {
    flex: 1;
    color: var(--text-primary);
}

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

.goal-item button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
}

.goal-item button:hover {
    color: var(--danger-color);
}

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

.task-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: var(--transition);
    cursor: pointer;
}

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

.task-checkbox {
    width: 22px;
    height: 22px;
    cursor: pointer;
    margin-top: 2px;
}

.task-content {
    flex: 1;
}

.task-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.task-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.task-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.task-badge {
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.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(59, 130, 246, 0.1);
    color: var(--info-color);
}

.task-due {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.task-due.overdue {
    color: var(--danger-color);
    font-weight: 600;
}

.task-category {
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
}

.task-actions {
    display: flex;
    gap: 4px;
}

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

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

/* Task Controls */
.task-controls {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 10px 10px 10px 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 18px;
}

.filter-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

/* Calendar */
.calendar-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.calendar-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.calendar-day-header {
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    border: 2px solid transparent;
}

.calendar-day:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.calendar-day.today {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

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

.calendar-day.other-month {
    opacity: 0.3;
}

.calendar-day-number {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.calendar-indicators {
    display: flex;
    gap: 3px;
}

.indicator-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
}

.indicator-dot.task {
    background: var(--primary-color);
}

.indicator-dot.event {
    background: var(--secondary-color);
}

/* Day Details */
.day-details {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.day-details h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.day-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.day-tasks h4,
.day-events h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.event-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--secondary-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    transition: var(--transition);
}

.event-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.event-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 8px;
}

.event-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.event-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.event-details {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.event-details span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Pomodoro */
.pomodoro-container {
    max-width: 600px;
    margin: 0 auto;
}

.pomodoro-timer {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-lg);
}

.timer-display h1 {
    font-size: 72px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-variant-numeric: tabular-nums;
}

.timer-display p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
}

.timer-mode {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.mode-btn {
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.pomodoro-stats {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.pomodoro-stats h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.session-count {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.session-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 28px;
}

.session-count h2 {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.session-count p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Notes */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.note-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}

.note-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.note-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 12px;
}

.note-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.note-content {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 12px;
    max-height: 100px;
    overflow: hidden;
}

.note-date {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Focus Mode */
.focus-container {
    max-width: 800px;
    margin: 0 auto;
}

.focus-task-selector {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.focus-task-selector h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.focus-select {
    width: 100%;
    max-width: 500px;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    cursor: pointer;
}

.focus-task-display {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--primary-color);
}

.focus-task-content {
    margin-bottom: 32px;
}

.focus-task-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.focus-task-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.focus-task-meta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.focus-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.focus-tips {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.focus-tips h3 {
    font-size: 18px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.focus-tips ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.focus-tips li {
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.focus-tips li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-close i {
    font-size: 24px;
}

.modal-form {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input {
    width: auto;
    cursor: pointer;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* Compact Styles */
.task-list.compact .task-item {
    padding: 12px;
}

.task-list.compact .task-title {
    font-size: 14px;
}

.event-list.compact .event-item {
    padding: 12px;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar-header {
        padding: 20px 10px;
    }
    
    .app-logo span {
        display: none;
    }
    
    .nav-item span {
        display: none;
    }
    
    .nav-item {
        justify-content: center;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 20px;
    }
    
    .view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timer-display h1 {
        font-size: 56px;
    }
    
    .pomodoro-timer {
        padding: 32px 20px;
    }
    
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
    
    .task-controls {
        flex-direction: column;
    }
    
    .search-box {
        width: 100%;
    }
    
    .notes-grid {
        grid-template-columns: 1fr;
    }
}

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

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

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

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

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 8px;
}

.mt-2 {
    margin-top: 16px;
}

.mb-1 {
    margin-bottom: 8px;
}

.mb-2 {
    margin-bottom: 16px;
}