:root {
    /* Color Palette - Light Mode Default */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --bg-gradient-start: #f3f4f6;
    --bg-gradient-end: #e5e7eb;
    --surface-color: rgba(255, 255, 255, 0.7);
    --surface-border: rgba(255, 255, 255, 0.5);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);

    /* Spacing & Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;

    /* Font */
    --font-family: 'Outfit', sans-serif;
}

[data-theme="dark"] {
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e293b;
    --surface-color: rgba(30, 41, 59, 0.7);
    --surface-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    outline: none;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* App Container Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--surface-border);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 100;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

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

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    text-align: left;
    font-family: inherit;
    font-weight: 500;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.achievements-section {
    margin-top: var(--spacing-lg);
    flex: 0 0 auto;
}

.achievements-section h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.badge-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 4px;
}

.badge-item {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    cursor: help;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--surface-border);
}

.badge-item.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.badge-item.earned {
    background: var(--surface-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(0);
    animation: badgePop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.badge-item.earned:hover {
    transform: scale(1.1);
    background: var(--primary-color);
    color: white;
}

@keyframes badgePop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.bottom-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--surface-border);
}

.icon-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    font-size: 1.2rem;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
    position: relative;
    display: flex;
    flex-direction: column;
}

.top-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.menu-toggle {
    display: none;
    /* Mobile only */
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.search-container {
    flex: 1;
    position: relative;
    max-width: 600px;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    border: 1px solid var(--surface-border);
    box-shadow: var(--glass-shadow);
}

.search-container input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-sm);
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--text-primary);
}

.greeting-area {
    margin-bottom: var(--spacing-lg);
}

.greeting-area h2 {
    font-size: 2rem;
    font-weight: 600;
}

.date-display {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.progress-section {
    background: var(--surface-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
    margin-top: var(--spacing-sm);
    max-width: 400px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    font-weight: 500;
}

.progress-bar-bg {
    width: 100%;
    background: rgba(0, 0, 0, 0.1);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.5s ease;
}

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

.sort-options select {
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

/* Task List */
.task-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-bottom: 80px;
    /* Space for FAB */
}

/* Task Card */
.task-card {
    background: var(--surface-color);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--glass-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.task-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.15);
}

.task-card.completed {
    opacity: 0.7;
}

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

.task-checkbox-area {
    display: flex;
    align-items: center;
}

.custom-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

.task-card.completed .custom-checkbox {
    background: var(--primary-color);
}

.custom-checkbox::after {
    content: '✓';
    color: white;
    font-size: 14px;
    display: none;
}

.task-card.completed .custom-checkbox::after {
    display: block;
}

.task-content-area {
    flex: 1;
}

.task-title {
    font-weight: 500;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.task-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.priority-indicator {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.priority-high {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.priority-medium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.priority-low {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.delete-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
    font-size: 1.2rem;
    padding: var(--spacing-sm);
}

.task-card:hover .delete-btn {
    opacity: 1;
}

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

/* Floating Action Button */
.fab {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-action-btn-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 50;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
}

/* Right Panel */
.right-panel {
    width: 320px;
    background: var(--surface-color);
    border-left: 1px solid var(--surface-border);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.3s;
}

.panel-section {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    /* slightly lighter */
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
}

.pomodoro-section {
    text-align: center;
}

.timer-display {
    font-size: 3rem;
    font-weight: 700;
    font-family: monospace;
    margin: var(--spacing-md) 0;
    color: var(--text-primary);
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s;
}

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

.btn-secondary {
    background: rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.timer-modes {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.mode-btn {
    background: transparent;
    border: 1px solid var(--surface-border);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
}

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

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: var(--surface-color);
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--surface-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

/* Ensure modal content background is solid enough in dark mode */
[data-theme="dark"] .modal-card {
    background: #1e293b;
}

[data-theme="light"] .modal-card {
    background: #ffffff;
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--surface-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-control,
input[type="text"],
textarea,
input[type="datetime-local"] {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.05);
    /* Slight dark in light mode */
    color: var(--text-primary);
    font-family: inherit;
}

.large-input {
    font-size: 1.2rem;
    padding: var(--spacing-md);
}

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

.priority-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.radio-label input {
    display: none;
}

.badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    border: 1px solid currentColor;
    cursor: pointer;
    opacity: 0.5;
    transition: 0.2s;
}

.badge.low {
    color: var(--success-color);
}

.badge.medium {
    color: var(--warning-color);
}

.badge.high {
    color: var(--danger-color);
}

.radio-label input:checked+.badge {
    opacity: 1;
    background: currentColor;
    color: white;
    /* Contrast issues might arise, simplified for now */
}

/* Fix contrast on badges when active */
.radio-label input:checked+.badge.low {
    background: var(--success-color);
    color: #fff;
}

.radio-label input:checked+.badge.medium {
    background: var(--warning-color);
    color: #fff;
}

.radio-label input:checked+.badge.high {
    background: var(--danger-color);
    color: #fff;
}

.subtasks-section {
    margin-top: var(--spacing-md);
    border-top: 1px solid var(--surface-border);
    padding-top: var(--spacing-md);
}

/* Settings Modal Styles */
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--surface-border);
}

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

.setting-item select {
    max-width: 150px;
}

.checkbox-row {
    justify-content: flex-start;
    gap: var(--spacing-md);
}

.checkbox-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.danger-zone {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--danger-color);
    border-radius: var(--radius-md);
    background: rgba(239, 68, 68, 0.05);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, transform 0.1s;
}

.btn-danger:hover {
    background: #dc2626;
    transform: scale(1.02);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideUp 0.3s ease forwards;
}

.toast button {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Responsive */
@media (max-width: 900px) {
    .right-panel {
        display: none;
        /* Can be toggled or moved in v2 */
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        position: absolute;
        height: 100%;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .menu-toggle {
        display: block;
    }

    .floating-action-btn-container {
        bottom: 20px;
        right: 20px;
    }
}

/* View Options */
.view-btn {
    background: transparent;
    border: 1px solid var(--surface-border);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

/* Kanban Board */
.kanban-board {
    display: flex;
    gap: var(--spacing-md);
    height: calc(100% - 140px);
    overflow-x: auto;
    padding-bottom: var(--spacing-lg);
}

.kanban-column {
    min-width: 280px;
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
    display: flex;
    flex-direction: column;
}

.column-header {
    padding: var(--spacing-md);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--surface-border);
}

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

.column-body.drop-target {
    background: rgba(99, 102, 241, 0.05);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot.todo {
    background: var(--text-secondary);
}

.dot.progress {
    background: var(--warning-color);
}

.dot.done {
    background: var(--success-color);
}

.count-badge {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 0.7rem;
    margin-left: auto;
}

/* Voice Command Button Ripple */
#voiceCommandBtn.recording {
    color: var(--danger-color);
    animation: pulse 1.5s infinite;
    background: rgba(239, 68, 68, 0.1);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* Analytics Modal */
.modal-card.large {
    width: 90%;
    max-width: 800px;
    height: 80vh;
}

.analytics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.stat-card {
    background: rgba(0, 0, 0, 0.02);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
}

.stat-card.full-width {
    grid-column: span 2;
}

.stat-card h4 {
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Simple CSS Charts */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    height: 150px;
    padding-top: 20px;
}

.bar-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.bar {
    width: 100%;
    background: var(--primary-color);
    border-radius: 4px 4px 0 0;
    transition: height 0.5s ease;
    min-height: 4px;
}

.bar-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.chart-container {
    height: 150px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Circular Progress for Completion */
.circular-chart {
    width: 120px;
    height: 120px;
}

.circle-bg {
    fill: none;
    stroke: var(--surface-border);
    stroke-width: 3.8;
}

.circle {
    fill: none;
    stroke-width: 2.8;
    stroke-linecap: round;
    animation: progress 1s ease-out forwards;
}

.percentage {
    fill: var(--text-primary);
    font-family: inherit;
    font-weight: bold;
    font-size: 0.5em;
    text-anchor: middle;
}

@keyframes progress {
    0% {
        stroke-dasharray: 0 100;
    }
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10px, 1fr));
    gap: 4px;
    height: 100px;
}

.heat-box {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 2px;
}

.heat-box.level-1 {
    background: rgba(16, 185, 129, 0.3);
}

.heat-box.level-2 {
    background: rgba(16, 185, 129, 0.6);
}

.heat-box.level-3 {
    background: rgba(16, 185, 129, 0.9);
}

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

    .stat-card.full-width {
        grid-column: span 1;
    }

    .kanban-board {
        flex-direction: column;
        overflow-y: auto;
    }

    .kanban-column {
        min-width: 100%;
        height: 300px;
        /* Fixed height for mobile scroll */
    }
}