/* Pomodoro Timer Styles */

/* Layout & Structure */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.nav {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-duration);
}

.nav-link:hover {
    color: var(--color-primary);
}

/* Reset State Button */
.reset-state-btn {
    background: var(--color-surface);
    border: 2px solid var(--color-gray-300);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-duration);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    opacity: 1;
    visibility: visible;
}

.reset-state-btn:hover {
    border-color: var(--color-error);
    color: var(--color-error);
    transform: rotate(90deg);
    background: var(--color-error-light, #fef2f2);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
}

.reset-state-btn:focus {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}

.app-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--color-text-primary);
    margin: 0;
}

.app-subtitle {
    color: var(--color-text-secondary);
    margin: 0.5rem 0 0 0;
    font-size: 1.1rem;
}

.main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.card {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.card-title {
    margin: 0 0 1.5rem 0;
    color: var(--color-text-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

/* Timer Section */
.timer-section {
    text-align: center;
}

.timer-display {
    margin-bottom: 2rem;
}

.timer-circle {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

.progress-ring {
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    shape-rendering: geometricPrecision;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.progress-ring-bg {
    stroke: var(--color-gray-200);
    fill: transparent;
}

.progress-ring-fill {
    stroke: var(--color-primary);
    fill: transparent;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.3s ease-in-out;
}

.progress-ring-circle {
    stroke: var(--color-primary);
    fill: none;
    stroke-linecap: round;
    stroke-width: 8;
    transition: stroke 0.2s ease;
    transform-origin: 50% 50%;
    /* No transition on stroke-dashoffset for smooth continuous animation */
}

/* Progress Ring Animations */
@keyframes pulse {
    0%, 100% { 
        opacity: 1; 
        transform: rotate(-90deg) scale(1);
    }
    50% { 
        opacity: 0.7; 
        transform: rotate(-90deg) scale(1.02);
    }
}

@keyframes completion-flash {
    0% { filter: brightness(1); }
    50% { filter: brightness(1.3) drop-shadow(0 0 10px currentColor); }
    100% { filter: brightness(1); }
}

.timer-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.timer-time {
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-text-primary);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    margin-bottom: 0.5rem;
}

.timer-phase {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

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

/* Timer Controls */
.timer-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-lg);
    min-width: 160px;
}

/* Statistics Section */
.stats-section {
    margin-bottom: var(--spacing-6);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-3);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-3);
    background: var(--color-background);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-duration);
}

.stat-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Settings Section */
.settings-section {
    margin-top: 1rem;
}

.settings-section.compact {
    padding: 1rem;
}

.settings-compact-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.settings-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}

.form-group.compact {
    margin: 0;
}

.form-group.compact label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    display: block;
}

.form-input.compact {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
    height: auto;
    min-height: 32px;
}

.settings-toggles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.8rem;
}

.form-toggle.compact {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    cursor: pointer;
}

.form-toggle.compact .form-toggle-slider {
    width: 36px;
    height: 20px;
    flex-shrink: 0;
    margin-right: 0.25rem;
}

.form-toggle.compact .form-toggle-label {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

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

.settings-toggles {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

/* Toggle Switch Styles */
.form-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
    user-select: none;
}

.form-toggle input[type="checkbox"] {
    display: none;
}

.form-toggle-slider {
    position: relative;
    width: 50px;
    height: 24px;
    background: var(--color-gray-300);
    border-radius: 24px;
    transition: var(--transition-all);
}

.form-toggle-slider:before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    background: var(--color-white);
    transition: var(--transition-all);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-toggle input:checked + .form-toggle-slider {
    background: var(--color-success-light);
}

.form-toggle input:checked + .form-toggle-slider:before {
    transform: translateX(26px);
}

.form-toggle-label {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* Break Overlay Styles */
.break-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

.break-overlay.hidden {
    display: none;
}

.break-content {
    text-align: center;
    max-width: 500px;
    padding: var(--spacing-8);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.break-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-4);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.break-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}

.break-message {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-6);
}

.break-timer {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    font-family: 'Monaco', 'Menlo', monospace;
    margin-bottom: var(--spacing-6);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.break-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
}

.suggestion-item {
    padding: var(--spacing-3);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.break-progress {
    margin-top: var(--spacing-6);
}

.break-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-2);
}

.break-progress-fill {
    height: 100%;
    background: var(--color-white);
    width: 0%;
    transition: width 1s linear;
    border-radius: 4px;
}

.break-progress-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    margin: 0;
}

.emergency-shortcut-hint {
    margin-top: 1.5rem;
    text-align: center;
    opacity: 0.7;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    animation: pulse 2s infinite;
}

.emergency-shortcut-hint kbd {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* Timer State Classes */
.timer-focus .progress-ring__progress {
    stroke: var(--color-primary-light);
}

.timer-short-break .progress-ring__progress {
    stroke: var(--color-success-light);
}

.timer-long-break .progress-ring__progress {
    stroke: var(--color-warning);
}

.timer-paused .progress-ring__progress {
    stroke: var(--color-gray-400);
}

.timer-focus .timer-phase {
    color: var(--color-primary-light);
}

.timer-short-break .timer-phase {
    color: var(--color-success-light);
}

.timer-long-break .timer-phase {
    color: var(--color-warning);
}

/* Dark Theme Adjustments */
[ds-theme="dark"] .break-overlay {
    background: linear-gradient(135deg, var(--color-primary-dark), #1e293b);
}

[ds-theme="dark"] .form-toggle-slider {
    background: var(--color-gray-600);
}

[ds-theme="dark"] .form-toggle-label {
    color: var(--color-text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .timer-circle {
        width: 250px;
        height: 250px;
    }
    
    .timer-time {
        font-size: 2.5rem;
    }
    
    .timer-session {
        font-size: 0.9rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .settings-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .settings-toggles {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }
    
    .form-toggle.compact {
        padding: 0.3rem 0;
    }
    
    .form-toggle.compact .form-toggle-slider {
        width: 32px;
        height: 18px;
    }
    
    .form-toggle.compact .form-toggle-label {
        font-size: 0.8rem;
    }
    
    .form-group.compact label {
        font-size: 0.8rem;
    }
    
    .form-input.compact {
        font-size: 0.85rem;
        padding: 0.35rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .timer-circle svg {
        width: 200px;
        height: 200px;
    }
    
    .progress-ring__circle,
    .progress-ring__progress {
        r: 90;
        cx: 100;
        cy: 100;
    }
    
    .timer-time {
        font-size: var(--font-size-3xl);
    }
    
    .break-title {
        font-size: var(--font-size-2xl);
    }
    
    .break-suggestions {
        grid-template-columns: 1fr;
    }
}

/* Animation and Transitions */
.card-section {
    animation: fadeInUp 0.6s ease-out;
}

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

.btn {
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: translateY(0);
}

/* Focus and Accessibility */
.break-overlay:focus-within {
    outline: none;
}

.timer-controls button:focus-visible,
.form-toggle:focus-within {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

/* Advanced Statistics Styles */
.advanced-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-category {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    padding: 1rem;
    background: var(--color-background);
}

.stat-category-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.stat-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.stat-row .stat-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    flex: 1;
}

.stat-row .stat-value {
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    min-width: 60px;
    text-align: right;
}

/* Charts Section Styles */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.chart-container {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    padding: 1rem;
    background: var(--color-background);
    min-height: 250px;
}

.chart-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 1rem 0;
    text-align: center;
}

.chart-container canvas {
    max-width: 100%;
    max-height: 200px;
}

/* Responsive adjustments for charts */
@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        padding: 0.75rem;
        min-height: 200px;
    }
    
    .chart-container canvas {
        max-height: 150px;
    }
}

/* Responsive adjustments for advanced stats */
@media (max-width: 768px) {
    .advanced-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-category {
        padding: 0.75rem;
    }
    
    .stat-row {
        padding: 0.4rem 0;
    }
    
    .stat-row .stat-label,
    .stat-row .stat-value {
        font-size: 0.85rem;
    }
}

/* Reset State Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    box-sizing: border-box;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease-out;
    position: relative;
    border: 1px solid var(--color-border);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 1.5rem 1.5rem 0 1.5rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 1rem;
}

.modal-body {
    padding: 0 1.5rem 1rem 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem 1.5rem 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.modal-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.25rem;
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-duration);
}

.modal-close-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-text-primary);
}

.reset-warning-list {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.reset-warning-list li {
    margin: 0.5rem 0;
    color: var(--color-text-secondary);
}

.btn-danger {
    background: var(--color-error);
    color: white;
    border: 2px solid var(--color-error);
}

.btn-danger:hover {
    background: var(--color-error-dark, #dc2626);
    border-color: var(--color-error-dark, #dc2626);
    transform: translateY(-1px);
}

.btn-danger:focus {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}

/* Responsive adjustments for reset button */
@media (max-width: 768px) {
    .reset-state-btn {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
    
    .nav {
        gap: 1rem;
    }
}

/* Timer Settings Section */
.settings-section {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

/* Preset Configurations */
.presets-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.presets-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 1rem 0;
    text-align: center;
}

.presets-grid {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.preset-chip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-duration);
    min-width: 100px;
    font-family: inherit;
}

.preset-chip:hover:not(.active) {
    border-color: var(--color-primary);
    background: var(--color-primary-alpha);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.preset-chip:hover.active {
    background: var(--color-success-dark);
    border-color: var(--color-success-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-success-bg);
}

.preset-chip:active {
    transform: translateY(0);
}

.preset-chip.active {
    border-color: var(--color-success-light);
    background: var(--color-success-light);
    color: white;
    box-shadow: 0 2px 8px var(--color-success-bg);
    transform: translateY(-1px);
}

.preset-chip.active .preset-label {
    font-weight: 700;
}

.preset-chip.active .preset-values {
    opacity: 0.95;
    font-weight: 500;
}

.preset-label {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1;
}

.preset-values {
    font-size: 0.75rem;
    opacity: 0.8;
    line-height: 1;
    font-weight: 400;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.input-group {
    display: flex;
    align-items: center;
    position: relative;
}

.form-input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 0.75rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-duration);
}

.form-input:hover {
    border-color: var(--color-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

.input-suffix {
    position: absolute;
    right: 0.75rem;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    pointer-events: none;
}

.settings-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.auto-save-note {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    text-align: center;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* Lock Screen Toggle Styles */
.lock-screen-settings {
    padding: 1.5rem 0 0 0;
    border-top: 1px solid var(--color-gray-200);
    margin-top: 1rem;
}

.settings-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 1rem 0;
}

.toggle-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toggle-label {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    cursor: pointer;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-duration);
}

.toggle-label:hover {
    border-color: var(--color-primary-light);
    background: var(--color-primary-50);
}

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

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-gray-300);
    border-radius: 24px;
    transition: all 0.3s ease;
    flex-shrink: 0;
    margin-top: 2px;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked + .toggle-slider {
    background: var(--color-success-light);
}

.toggle-input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

.toggle-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
}

.toggle-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.toggle-description {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.3;
}

/* Responsive Settings */
@media (max-width: 768px) {
    .presets-grid {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
    
    .preset-chip {
        width: 100%;
        max-width: 200px;
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
        padding: 0.75rem 1rem;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .settings-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .settings-actions .btn {
        width: 100%;
        max-width: 200px;
    }
}

/* Advanced Statistics Charts */
.advanced-stats-section {
    margin-top: 3rem;
}

.chart-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.form-select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.9rem;
    min-width: 150px;
    cursor: pointer;
    transition: all var(--transition-duration);
}

.form-select:hover {
    border-color: var(--color-primary);
}

.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

.charts-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
}

.chart-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-duration);
    width: 310px; /* Fixed width to accommodate 280px canvas + padding */
    flex-shrink: 0; /* Prevent shrinking */
}

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

.chart-card h3 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
}

.chart-card canvas {
    width: 280px !important;
    height: 240px !important;
    max-width: 100%;
}

/* Responsive Charts */
@media (max-width: 768px) {
    .charts-grid {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .chart-card {
        padding: 1rem;
        width: 270px; /* Adjust for mobile canvas size + padding */
    }
    
    .chart-card canvas {
        width: 240px !important;
        height: 200px !important;
    }
    
    .advanced-stats-section {
        margin-top: 2rem;
    }
}

/* Medium screens - allow 2 charts per row */
@media (min-width: 769px) and (max-width: 1200px) {
    .charts-grid {
        justify-content: space-around;
    }
}

/* Break Overlay Styles */
.break-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

.break-overlay.hidden {
    display: none;
}

.break-content {
    text-align: center;
    max-width: 500px;
    padding: var(--spacing-8);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.break-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-4);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.break-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}

.break-message {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-6);
}

.break-timer {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    font-family: 'Monaco', 'Menlo', monospace;
    margin-bottom: var(--spacing-6);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.break-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
}

.suggestion-item {
    padding: var(--spacing-3);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.break-progress {
    margin-top: var(--spacing-6);
}

.break-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-2);
}

.break-progress-fill {
    height: 100%;
    background: var(--color-white);
    width: 0%;
    transition: width 1s linear;
    border-radius: 4px;
}

.break-progress-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    margin: 0;
}

.emergency-shortcut-hint {
    margin-top: 1.5rem;
    text-align: center;
    opacity: 0.7;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    animation: pulse 2s infinite;
}

.emergency-shortcut-hint kbd {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.8rem;
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* Responsive break overlay */
@media (max-width: 768px) {
    .break-content {
        padding: var(--spacing-6);
        margin: var(--spacing-4);
    }
    
    .break-title {
        font-size: var(--font-size-3xl);
    }
    
    .break-timer {
        font-size: var(--font-size-4xl);
    }
    
    .break-suggestions {
        grid-template-columns: 1fr;
        gap: var(--spacing-2);
    }
}

/* PWA Specific Styles */
@media (display-mode: standalone) {
    .container {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}