/* Updated CSS: dynamic blue shades via --primary-color variables */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-hue: 210;
    --primary-saturation: 70%;
    --primary-lightness: 55%;
    --primary-color: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
    --primary-color-darker: hsl(var(--primary-hue), var(--primary-saturation), calc(var(--primary-lightness) - 15%));
    --primary-color-lighter: hsl(var(--primary-hue), var(--primary-saturation), calc(var(--primary-lightness) + 15%));
    
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #dfdfdf;
    --bg-tertiary: #f1f5f9;
    
    --border-color: #e5e7eb;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-tertiary: #3a3a3a;
    
    --border-color: #333333;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
}

/* Header Styles */
.main-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: none;
}

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

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

.switch {
    position: relative;
    width: 44px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

#mode-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.focus-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.focus-btn:hover {
    background: var(--primary-color-darker);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.dark-mode .focus-btn {
    background: var(--primary-color-darker);
    color: white;
}
.dark-mode .focus-btn:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Main Container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* Mobile-first responsive adjustments for main container */
@media (max-width: 768px) {
    .main-container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: var(--spacing-sm);
    }
}

/* Hero Section - Timer and Tasks */
.hero-section {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timer-tasks-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    position: relative;
}

.timer-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    max-width: 500px;
    z-index: 1;
}

.hero-task-card {
    position: fixed;
    top: calc(var(--spacing-xl) + 80px);
    right: var(--spacing-xl);
    width: 280px;
    max-height: 400px;
    z-index: 2;
}

/* Mobile responsive positioning for hero task card */
@media (max-width: 768px) {
    .hero-task-card {
        position: static;
        width: 100%;
        max-height: none;
        margin-top: var(--spacing-lg);
        order: 2;
    }
    
    .timer-tasks-container {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
}

.hero-task-card .card-header {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
}

.hero-task-card .card-header h3 {
    font-size: 1rem;
}

.hero-task-card .card-content {
    padding: var(--spacing-lg);
}

.hero-task-card .input-group {
    margin-bottom: var(--spacing-md);
}

.hero-task-card .input-group input {
    font-size: 0.8rem;
    padding: var(--spacing-sm);
}

.hero-task-card .add-btn {
    font-size: 0.8rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

.hero-task-card .task-list {
    max-height: 200px;
    overflow-y: auto;
}

.hero-task-card .task-list li {
    padding: var(--spacing-sm);
}

.hero-task-card .task-list li span {
    font-size: 0.8rem;
}

.hero-task-card .delete-btn {
    width: 20px;
    height: 20px;
    font-size: 0.7rem;
}

/* Hero Section - Timer */
.timer-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    width: 500px;
    height: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Mobile responsive timer card */
@media (max-width: 768px) {
    .timer-card {
        width: 100%;
        max-width: 400px;
        height: auto;
        min-height: 400px;
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .timer-card {
        max-width: 320px;
        min-height: 350px;
        padding: var(--spacing-md);
    }
}

.timer-header {
    margin-bottom: var(--spacing-lg);
}

.timer-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

#session-counter {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.timer-display {
    margin-bottom: var(--spacing-lg);
}

#timer {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

#timer-progress-container {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

#timer-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-color-lighter));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
}

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

.control-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    min-width: 80px;
}

.control-btn.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.control-btn.primary:hover {
    background: var(--primary-color-darker);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.dark-mode .control-btn.primary {
    background: var(--primary-color-darker);
    color: white;
}

.dark-mode .control-btn.primary:hover {
    background: var(--primary-color);
}

.control-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.control-btn.secondary:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.control-btn.tertiary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.mode-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
}

.mode-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: calc(var(--border-radius) - 2px);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.mode-btn.active,
.mode-btn:hover {
    background: var(--bg-primary);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.daily-progress-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.progress-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 90px;
}

#daily-progress-container {
    flex: 1;
    height: 5px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

#daily-progress {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 2px;
}

/* Content Grid - Now single column for Notes */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.content-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* Mobile responsive content grid */
@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }
    
    .content-column {
        gap: var(--spacing-lg);
    }
    
    .card-header {
        padding: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
    }
    
    .card-content {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .content-grid {
        gap: var(--spacing-md);
    }
    
    .content-column {
        gap: var(--spacing-md);
    }
    
    .card-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .card-header h3 {
        font-size: 1rem;
    }
    
    .card-content {
        padding: var(--spacing-md);
    }
}

/* Card Styles */
.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

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

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

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-icon {
    font-size: 1.25rem;
    opacity: 0.7;
}

.card-content {
    padding: var(--spacing-xl);
}

/* Input Groups */
.input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.input-group input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.1);
}

.add-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    margin-bottom: var(--spacing-lg);
}

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

.dark-mode .add-btn {
    background: var(--primary-color-darker);
    color: white;
}

.dark-mode .add-btn:hover {
    background: var(--primary-color);
}

/* Task List */
.task-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.task-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.task-list li:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.task-list li.completed {
    opacity: 0.6;
    text-decoration: line-through;
}

.task-list li span {
    flex: 1;
    cursor: pointer;
    font-size: 0.875rem;
}

.delete-btn {
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
}

.delete-btn:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Notes Section */
.notes-input textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    resize: vertical;
    min-height: 80px;
    margin-bottom: var(--spacing-sm);
    font-family: inherit;
    transition: var(--transition);
}

.notes-input textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.1);
}

.notes-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.notes-list li {
    position: relative;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.notes-list li:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.notes-list li small {
    display: block;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

.notes-list li .delete-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
}

/* Ambience Section */
.video-input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.video-input-group input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.video-input-group button {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.video-container {
    aspect-ratio: 16/9;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--bg-secondary);
}

.video-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Customization Section */
.customization-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.color-picker-group,
.wallpaper-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.color-picker-group label,
.wallpaper-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.color-picker-group input[type="color"] {
    width: 60px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
}

.wallpaper-group select {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
}

/* Fix for wallpaper category dropdown in dark glass mode */
.dark-mode.glass-mode #wallpaper-category {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dark-mode.glass-mode #wallpaper-category option {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    opacity: 0.4;
}


/* Wallpaper Grid Updates */
.wallpaper-grid {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    border: 1px solid var(--border-color);
    min-height: 140px;
}

.wallpaper-grid::-webkit-scrollbar {
    height: 6px;
}

.wallpaper-grid::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.wallpaper-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
    transition: var(--transition);
}

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

.wallpaper-thumb-container {
    position: relative;
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.wallpaper-thumb-container.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2);
}

.wallpaper-thumb-container.loaded {
    background: transparent;
}

.wallpaper-thumb-container.error {
    background: var(--bg-tertiary);
}

.wallpaper-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--border-radius) - 2px);
    transition: var(--transition);
}

.wallpaper-thumb-container:hover .wallpaper-thumb {
    transform: scale(1.05);
}

.wallpaper-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--spacing-xs);
}

.wallpaper-error span {
    font-size: 1.2em;
    margin-bottom: var(--spacing-xs);
}

.wallpaper-error small {
    font-size: 0.7rem;
    opacity: 0.8;
}

/* Glass Mode Updates for Wallpapers */
.glass-mode .wallpaper-grid {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .wallpaper-grid {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .wallpaper-thumb-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .wallpaper-thumb-container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .wallpaper-thumb-container.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.3);
}

.glass-mode .wallpaper-thumb-container.error {
    background: rgba(255, 255, 255, 0.1);
}

.glass-mode.dark-mode .wallpaper-thumb-container.error {
    background: rgba(255, 255, 255, 0.05);
}

/* Loading Animation for Wallpapers */
.wallpaper-grid .loading {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive Updates */
@media (max-width: 768px) {
    .wallpaper-thumb-container {
        width: 100px;
        height: 70px;
    }
    
    .wallpaper-grid {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .wallpaper-thumb-container {
        width: 90px;
        height: 60px;
    }
    
    .wallpaper-error span {
        font-size: 1em;
    }
    
    .wallpaper-error small {
        font-size: 0.65rem;
    }
}

/* Settings Panel */
.settings-panel {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

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

.settings-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.settings-content {
    padding: var(--spacing-xl);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.setting-item label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-with-unit {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.input-with-unit input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.unit {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.theme-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

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

.hue-slider,
.saturation-slider,
.lightness-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 8px;
    border-radius: 4px;
    cursor: pointer;
    outline: none;
    background: var(--bg-tertiary);
}

.hue-slider {
    background: linear-gradient(90deg, 
        hsl(0, 100%, 50%), 
        hsl(60, 100%, 50%), 
        hsl(120, 100%, 50%), 
        hsl(180, 100%, 50%), 
        hsl(240, 100%, 50%), 
        hsl(300, 100%, 50%), 
        hsl(360, 100%, 50%)
    );
}

.saturation-slider {
    background: linear-gradient(90deg, #808080, var(--primary-color));
}

.lightness-slider {
    background: linear-gradient(90deg, #000000, #808080, #ffffff);
}
.hue-slider::-webkit-slider-thumb,
.saturation-slider::-webkit-slider-thumb,
.lightness-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.hue-slider::-webkit-slider-thumb:hover,
.saturation-slider::-webkit-slider-thumb:hover,
.lightness-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.hue-slider::-moz-range-thumb,
.saturation-slider::-moz-range-thumb,
.lightness-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.hue-preview {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    transition: var(--transition);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.theme-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    min-width: 80px;
    text-align: left;
    font-weight: 500;
}

/* Save Settings Button */
.save-settings-btn {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color-darker));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-lg);
}

.save-settings-btn:hover {
    background: linear-gradient(135deg, var(--primary-color-darker), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.save-settings-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

/* Theme Setting Specific Styles */
.theme-setting {
    grid-column: span 2;
}

.theme-setting .theme-controls {
    margin-top: var(--spacing-sm);
}

/* Glass Mode for Settings */
.glass-mode .settings-panel,
.glass-mode .settings-panel-full {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .settings-panel,
.glass-mode.dark-mode .settings-panel-full {
    background: rgba(17, 24, 39, 0.3);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Updates for Settings */
@media (max-width: 768px) {
    .theme-setting {
        grid-column: span 1;
    }
    
    .theme-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }
    
    .theme-label {
        min-width: auto;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .theme-controls {
        padding: var(--spacing-sm);
    }
}

/* Data Management Buttons - Using Dynamic Theme Colors */
.save-data-btn,
.import-data-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    color: #ffffff;
    background: var(--primary-color);
}

.dark-mode .save-data-btn,
.dark-mode .import-data-btn {
    background: var(--primary-color-darker);
    color: white;
}

.save-data-btn:hover,
.import-data-btn:hover {
    background: var(--primary-color-darker);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.dark-mode .save-data-btn:hover,
.dark-mode .import-data-btn:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.save-data-btn:hover,
.import-data-btn:hover  {
    background: var(--primary-color-darker);
}


.save-data-btn:active,
.import-data-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.save-data-btn span:first-child,
.import-data-btn span:first-child {
    font-size: 1rem;
}


/* Responsive Updates for Header Controls */
@media (max-width: 768px) {
    .header-controls {
        gap: var(--spacing-sm);
    }
    
    .save-data-btn,
    .import-data-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }
    
    .save-data-btn span:last-child,
    .import-data-btn span:last-child {
        display: none; /* Hide text on mobile, keep icon */
    }
}

@media (max-width: 480px) {
    .header-controls {
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: var(--spacing-xs);
    }
    
    .save-data-btn,
    .import-data-btn {
        order: -1; /* Move data buttons to start on very small screens */
        min-width: 40px; /* Ensure minimum touch target */
    }
    
    .focus-btn {
        order: 1;
    }
    
    .theme-toggle {
        order: 0;
    }
}

/* Mobile responsive timer display and controls */
@media (max-width: 768px) {
    #timer {
        font-size: 2.5rem;
    }
    
    .timer-controls {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .control-btn {
        flex: 1;
        min-width: 70px;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    #timer {
        font-size: 2rem;
    }
    
    .control-btn {
        min-width: 60px;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }
    
    .timer-header h2 {
        font-size: 1rem;
    }
    
    #session-counter {
        font-size: 0.75rem;
    }
}

/* Utility Classes */
.hidden {
    display: none;
}

/* Floating Elements */
.keyboard-shortcuts {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    opacity: 0.7;
    transition: var(--transition);
    z-index: 50;
}

.keyboard-shortcuts:hover {
    opacity: 1;
}

.shortcuts-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.focus-mode .keyboard-shortcuts {
    opacity: 0.3;
}
.focus-mode .keyboard-shortcuts:hover {
    opacity: 0.7;
}

.shortcuts-content span {
    color: #d1d5db;
}

/* Footer */
.footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    text-align: center;
    color: #121212;
    background-color: var(--bg-primary);
    opacity: 0.8;
    font-size: 1rem;
    border-top: 1px solid var(--border-color);
}

.dark-mode .footer {
    background-color: var(--bg-primary);
    color: #f3f4f6;
    opacity: 0.9;
}

.footer a {
    color: var(--primary-color-darker);
    text-decoration: none;
    transition: var(--transition);
    text-shadow: #000000;
    
}

.footer a:hover {
    text-decoration: underline;
}

/* Notifications */
.notification {
    position: fixed;
    top: calc(var(--spacing-xl) + 60px);
    right: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    color: white;
    font-weight: 500;
    font-size: 0.8rem;
    z-index: 1000;
    transform: translateX(350px);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    max-width: 280px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, #10b981, #059669);
}

.notification.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.notification.info {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color-darker));
}

/* Focus Mode */
body.focus-mode .content-grid,
body.focus-mode .settings-panel,
body.focus-mode .footer {
    display: none;
}

/* Hide most header elements in focus mode */
body.focus-mode .main-header h1,
body.focus-mode .theme-toggle,
body.focus-mode .save-data-btn,
body.focus-mode .import-data-btn,
body.focus-mode .hamburger-menu {
    display: none;
}

/* Keep only focus button visible in header */
body.focus-mode .header-content {
    justify-content: flex-end;
    padding: var(--spacing-md) var(--spacing-xl);
}

body.focus-mode .timer-tasks-container {
    justify-content: center;
    margin-top: calc(var(--spacing-xl) * 2);
}

body.focus-mode .hero-task-card {
    display: none;
}

body.focus-mode .timer-card {

    max-width: 480px;
    width: 300px;
    height: 300px;
    padding: var(--spacing-md);
    opacity: 0.4;
    transition: opacity 0.3s ease, transform 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

body.focus-mode .timer-card:hover {
    opacity: 1;
    transform: scale(1.02);
}

/* Hide timer header elements in focus mode */
body.focus-mode .timer-header,
/* body.focus-mode .timer-controls, */
body.focus-mode .mode-controls,
body.focus-mode .daily-progress-section { 
    display: none;
}

/* Make timer display minimal */
body.focus-mode .timer-display {
    margin-bottom: 0;
    text-align: center;
}


body.focus-mode .floating-music-btn {
    display: none;
}

/* Responsive focus mode */
@media (max-width: 768px) {
    body.focus-mode .timer-card {
        max-width: 280px;
        width: 280px;
        height: 280px;
        padding: var(--spacing-md);
    }
    
    body.focus-mode #timer {
        font-size: 2rem;
    }
    
    body.focus-mode .header-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    body.focus-mode .timer-card {
        max-width: 240px;
        width: 240px;
        height: 240px;
    }
    
    body.focus-mode #timer {
        font-size: 1.75rem;
    }
}

/* Enhanced Navbar Styles */
.navbar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 300px;
    height: 100vh;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(255, 255, 255, 0.98) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    display: flex;
    flex-direction: column;
    visibility: hidden;
    opacity: 0;
    transform: translateX(-100%);
    overflow: hidden;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), #4ade80, #06b6d4);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.navbar.open {
    left: 0;
    visibility: visible;
    opacity: 1;
    transform: translateX(0);
}

.navbar.open::before {
    opacity: 1;
}

/* Force navbar to be hidden on initial load */
.navbar:not(.open) {
    left: -100% !important;
    visibility: hidden !important;
    opacity: 0 !important;
    transform: translateX(-100%) !important;
}

/* Enhanced Navbar Header */
.navbar-header {
    padding: var(--spacing-xl) var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(255, 255, 255, 0.95) 100%);
    position: relative;
    backdrop-filter: blur(10px);
}

.navbar-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-xl);
    right: var(--spacing-xl);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.navbar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.025em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Enhanced Close Button */
.nav-close {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    line-height: 1;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.nav-close::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    transition: all 0.3s ease;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
}

.nav-close:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-close:hover::before {
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

/* Enhanced Navbar Links */
.nav-links {
    list-style: none;
    padding: var(--spacing-lg) 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
}

.nav-links::-webkit-scrollbar {
    width: 4px;
}

.nav-links::-webkit-scrollbar-track {
    background: transparent;
}

.nav-links::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
}

.nav-links li {
    margin: var(--spacing-xs) var(--spacing-md);
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--border-radius-lg);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
    border-radius: 0 2px 2px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), #4ade80);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--border-radius-lg);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateX(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-link:hover::before {
    transform: scaleX(1);
}

.nav-link:hover::after {
    opacity: 0.05;
}

.nav-link.active {
    background: linear-gradient(135deg, hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.1), hsla(145, 63%, 58%, 0.05));
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: 
        0 4px 12px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2);
}

.nav-link.active::before {
    transform: scaleX(1);
    background: var(--primary-color);
}

.nav-link.active::after {
    opacity: 0.1;
}

/* Enhanced Navbar Overlay */
.navbar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    pointer-events: none;
    display: none;
}

.navbar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: block;
}

/* Enhanced Hamburger Menu */
.hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    margin-right: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    position: relative;
}

.hamburger-menu:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.hamburger-menu span {
    width: 100%;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
    position: relative;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.hamburger-menu span::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-color);
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hamburger-menu:hover span::before {
    opacity: 1;
}

.hamburger-menu:hover span {
    transform: scale(1.1);
}

/* Active hamburger animation */
.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        width: 280px;
    }
    
    .navbar-header {
        padding: var(--spacing-lg) var(--spacing-lg);
    }
    
    .navbar-header h2 {
        font-size: 1.125rem;
    }
}


.dark-mode .navbar {
    background: var(--bg-primary);
    border-right-color: var(--border-color);
}

.dark-mode .navbar-header {
    background: var(--bg-secondary);
}

.dark-mode .nav-close {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.dark-mode .nav-close:hover {
    background: var(--border-color);
    color: var(--primary-color);
}

.dark-mode .nav-link:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.dark-mode .nav-link.active {
    background: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.15);
    color: var(--primary-color);
    border: 1px solid hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.3);
    box-shadow: 
        0 4px 12px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}



/* Header Updates */
.header-left {
    display: flex;
    align-items: center;
}

/* Additional styles to ensure proper positioning */
/* The .header rule has been removed */

/* Body padding when navbar is open */
body.navbar-open {
    overflow: hidden;
}

/* Single Page Layout */
.single-page {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.notes-section-full,
.ambience-section-full,
.customization-section-full {
    min-height: 70vh;
}

.settings-panel-full {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    min-height: 70vh;
}

.settings-panel-full .settings-content {
    padding: var(--spacing-xl);
}

/* Glass Mode for Navbar */
.glass-mode .navbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .navbar {
    background: rgba(26, 26, 26, 0.9);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .navbar-header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .navbar-header {
    background: rgba(42, 42, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Updates */
@media (max-width: 768px) {
    .navbar {
        width: 100vw;
        left: -100%;
        visibility: hidden;
        opacity: 0;
        transform: translateX(-100%);
    }
    
    .navbar.open {
        left: 0;
        visibility: visible;
        opacity: 1;
        transform: translateX(0);
    }
    
    .navbar:not(.open) {
        left: -100% !important;
        visibility: hidden !important;
        opacity: 0 !important;
        transform: translateX(-100%) !important;
    }
    
    .hamburger-menu {
        margin-right: var(--spacing-sm);
    }
    
    .header-content {
        padding: var(--spacing-md);
    }
    
    .main-header h1 {
        font-size: 1.25rem;
    }
    
    .single-page {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.9rem;
    }
    
    .navbar-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .navbar-header h2 {
        font-size: 1rem;
    }
}

/* Animation for page transitions */
.main-container {
    animation: fadeInUp 0.4s ease-out;
}

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

/* Loading States */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100px;
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    margin-left: var(--spacing-sm);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.card {
    animation: fadeInUp 0.5s ease-out;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

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

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

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

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

/* Glass Mode Styles */
.glass-mode .card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

.glass-mode.dark-mode .card {
    background: rgba(17, 24, 39, 0.3);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

.glass-mode .timer-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.glass-mode.dark-mode .timer-card {
    background: rgba(17, 24, 39, 0.4);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.glass-mode .main-header {
    background: rgba(232, 232, 232, 0.8); 
    opacity: 0.7;
    backdrop-filter: blur(25px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .main-header {
    background: rgba(17, 24, 39, 0.8);
    opacity: 0.7;
    backdrop-filter: blur(25px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode.dark-mode .main-header {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .settings-panel {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .settings-panel {
    background: rgba(17, 24, 39, 0.3);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .theme-controls {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Glass Mode Input Styles */
.glass-mode input:not([type="range"]),
.glass-mode textarea,
.glass-mode select {
    background: rgba(255, 255, 255, 0.2) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.glass-mode.dark-mode input:not([type="range"]),
.glass-mode.dark-mode textarea,
.glass-mode.dark-mode select {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode input:not([type="range"]):focus,
.glass-mode textarea:focus,
.glass-mode select:focus {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2);
}

/* Background Blur */
body.background-blur {
    position: relative;
}

body.background-blur::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    filter: blur(var(--bg-blur-intensity, 0px));
    z-index: -1;
}

/* Customization Section Updates */
.customization-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.effect-group,
.glass-mode-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.effect-group label,
.glass-mode-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.blur-control {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.blur-control label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.blur-control input[type="range"] {
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--bg-secondary), var(--primary-color));
    cursor: pointer;
    outline: none;
}

.blur-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 2px solid white;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.blur-control input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 2px solid white;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

#blur-value {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-xs);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-sm);
}

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

#glass-mode-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Enhanced Glass Effects for Specific Elements */
.glass-mode .task-list li,
.glass-mode .notes-list li {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .task-list li,
.glass-mode.dark-mode .notes-list li {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .mode-controls {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .mode-controls {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-mode .wallpaper-grid {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-mode.dark-mode .wallpaper-grid {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Progress Bar Glass Effect */
.glass-mode #timer-progress-container,
.glass-mode #daily-progress-container {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-mode.dark-mode #timer-progress-container,
.glass-mode.dark-mode #daily-progress-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Responsive Updates */
@media (max-width: 768px) {
    .customization-grid {
        grid-template-columns: 1fr;
    }
}


/* Floating Music Button */
.floating-music-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50px;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
  z-index: 1000;
  font-weight: 600;
  min-width: 120px;
  justify-content: center;
}

.floating-music-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
  background: var(--primary-color-darker);
}

.dark-mode .floating-music-btn {
  background: var(--primary-color-darker);
  color: white;
}

.dark-mode .floating-music-btn:hover {
  background: var(--primary-color);
}

.floating-music-btn .music-icon {
  font-size: 20px;
  animation: pulse 2s infinite;
}

.floating-music-btn .music-label {
  font-size: 14px;
  letter-spacing: 0.5px;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Music Popup */
.music-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: var(--card-bg);
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  z-index: 1002;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.music-popup.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.music-popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.music-popup-overlay.active {
  opacity: 1;
  visibility: visible;
}

.music-popup-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.music-popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 16px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.glass-mode .music-popup-header {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.music-popup-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 600;
}

.close-popup {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.close-popup:hover {
  background: var(--accent-light);
  color: var(--text-primary);
  transform: rotate(90deg);
}

.music-popup-body {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
  background-color: var(--bg-secondary);
}

.glass-mode .music-popup-body {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.ambience-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.video-input-group {
  display: flex;
  gap: 12px;
  align-items: center;
}

.video-input-group input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s ease;
}

.video-input-group input:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-light);
}

.video-input-group button {
  padding: 12px 20px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.video-input-group button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

#video-url-button {
    background: var(--primary-color);
    flex-shrink: 0;
}
#video-url-button:hover {
    background: var(--primary-color-darker);
}

.dark-mode #video-url-button {
    background: var(--primary-color-darker);
}
.dark-mode #video-url-button:hover {
    background: var(--primary-color);
}

.video-container {
  position: relative;
  width: 100%;
  height: 300px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.video-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Mobile responsive: Hide keyboard shortcuts on mobile */
@media (max-width: 768px) {
    .keyboard-shortcuts {
        display: none !important;
    }
}