/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary, #6366f1);
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.2s;
    font-size: 14px;
    border-radius: 0 0 4px 0;
}
.skip-link:focus {
    top: 0;
}

/* App Loader */
.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0f0f23;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.app-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(46, 204, 113, 0.2);
    border-top-color: #2ecc71;
    border-radius: 50%;
    animation: loaderSpin 0.8s linear infinite;
}

@keyframes loaderSpin {
    to { transform: rotate(360deg); }
}

/* Habit Tracker - 2026 Design System */

:root {
    /* Colors */
    --primary: #2ecc71;
    --dark-bg: #0f0f23;
    --card-bg: #1a1a2e;
    --border-color: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --success: #00d084;
    --warning: #ffa502;
    --danger: #ff6b6b;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Light Mode */
body.light-mode,
[data-theme="light"] {
    --dark-bg: #f5f5fa;
    --card-bg: #ffffff;
    --border-color: #e0e0e8;
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a70;
}

[data-theme="light"] body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
}

[data-theme="light"] .header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, transparent 100%);
    border-bottom-color: var(--border-color);
}

[data-theme="light"] .section,
[data-theme="light"] .daily-challenge,
[data-theme="light"] .stat-card,
[data-theme="light"] .modal-content {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="light"] .habit-item {
    background-color: rgba(46, 204, 113, 0.05);
    border-color: var(--border-color);
}

[data-theme="light"] .habit-item:hover {
    background-color: rgba(46, 204, 113, 0.1);
}

[data-theme="light"] .btn-secondary {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="light"] .btn-secondary:hover {
    background-color: var(--border-color);
}

[data-theme="light"] .lang-menu {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="light"] .lang-option {
    color: var(--text-primary);
}

[data-theme="light"] .lang-option:hover {
    background-color: var(--border-color);
}

[data-theme="light"] .form-group input,
[data-theme="light"] .form-group select {
    background-color: var(--dark-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="light"] .template-btn {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="light"] .template-btn:hover {
    background-color: rgba(46, 204, 113, 0.05);
    border-color: var(--primary);
}

[data-theme="light"] .badge {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="light"] .badge.unlocked {
    background-color: rgba(46, 204, 113, 0.1);
    border-color: var(--primary);
}

[data-theme="light"] .github-heatmap {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="light"] .heatmap-cell.empty {
    background-color: var(--border-color);
}

.theme-toggle {
    position: fixed;
    top: 12px;
    right: 56px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-theme="light"] .theme-toggle {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

a {
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.8;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--card-bg) 0%, transparent 100%);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-left {
    flex: 1;
}

.app-title {
    margin: 0;
    color: var(--primary);
    font-weight: 700;
}

.subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

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

/* Buttons */
.btn-icon {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease, transform 0.2s ease;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background-color: var(--border-color);
    transform: scale(1.05);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
}

.btn-primary:hover {
    background-color: #27ae60;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

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

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

/* Language Selector */
.language-selector {
    position: relative;
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    min-width: 200px;
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
    margin-top: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
}

.lang-menu.hidden {
    display: none;
}

.lang-option {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    background: none;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    font-size: var(--font-size-base);
    transition: background-color 0.2s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
}

.lang-option:hover {
    background-color: var(--border-color);
}

.lang-option.active {
    background-color: var(--primary);
    color: #000;
}

/* Quote Section */
.quote-section {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary)20 0%, transparent 100%);
    border-left: 4px solid var(--primary);
    margin: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.daily-quote {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.quote-author {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Main Container */
.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding-bottom: var(--spacing-xl);
}

/* Tabs Navigation */
.tabs {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    background-color: var(--dark-bg);
}

.tab-btn {
    flex-shrink: 0;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.tab-btn.active {
    color: var(--primary);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-lg);
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--primary);
}

.tab-btn:hover {
    color: var(--text-primary);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Containers */
.today-container,
.habits-container,
.stats-container,
.heatmap-container {
    padding: var(--spacing-lg);
}

/* Today Tab */
.daily-challenge {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.today-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.daily-challenge h2 {
    margin: 0;
    color: var(--primary);
}

.btn-add-habit {
    flex-shrink: 0;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
    min-height: 56px;
}

/* Empty State Onboarding */
.empty-state-onboarding {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.empty-state-emoji {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.habits-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.habit-item {
    background-color: rgba(46, 204, 113, 0.05);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.habit-item:hover {
    transform: translateX(4px);
    background-color: rgba(46, 204, 113, 0.1);
}

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

.habit-checkbox {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background-color: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.habit-checkbox:hover {
    background-color: rgba(46, 204, 113, 0.1);
}

.habit-checkbox.checked {
    background-color: var(--primary);
    color: #000;
}

.habit-content {
    flex: 1;
}

.habit-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.habit-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.habit-streak {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
}

.habit-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.habit-actions button {
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--font-size-lg);
    padding: var(--spacing-sm);
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.habit-actions button:hover {
    color: var(--primary);
    background-color: var(--border-color);
}

/* Completion Stats */
.completion-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.stat-box {
    background-color: rgba(46, 204, 113, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
}

/* Habits Tab */
.habits-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

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

/* Templates */
.templates-section {
    margin-bottom: var(--spacing-xl);
}

.templates-section h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.template-btn {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    text-align: center;
    transition: all 0.3s ease;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.template-btn:hover {
    border-color: var(--primary);
    background-color: rgba(46, 204, 113, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.template-icon {
    font-size: var(--font-size-2xl);
}

.template-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* My Habits Section */
.my-habits-section h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

/* Statistics Tab */
.stat-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.stat-card h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
}

.stats-chart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.chart-label {
    min-width: 100px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.chart-bar {
    flex: 1;
    height: 30px;
    background-color: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.chart-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    border-radius: var(--radius-md);
    transition: width 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #000;
}

.chart-value {
    min-width: 40px;
    text-align: right;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* Badges */
.badges-section {
    margin-top: var(--spacing-xl);
}

.badges-section h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-lg);
}

.badge {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all 0.3s ease;
    min-height: 120px;
}

.badge.locked {
    opacity: 0.5;
}

.badge.unlocked {
    border-color: var(--primary);
    background-color: rgba(46, 204, 113, 0.1);
}

.badge-icon {
    font-size: var(--font-size-2xl);
}

.badge-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.badge-progress {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Heatmap Tab */
.heatmap-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.select {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    min-height: 44px;
    font-family: var(--font-family);
}

.select:focus {
    outline: none;
    border-color: var(--primary);
}

.github-heatmap {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(52, 1fr);
    gap: 2px;
    min-width: 500px;
}

.heatmap-cell {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.heatmap-cell:hover {
    border-color: var(--primary);
    transform: scale(1.1);
}

.heatmap-cell.empty {
    background-color: var(--border-color);
}

.heatmap-cell.level1 {
    background-color: rgba(46, 204, 113, 0.2);
}

.heatmap-cell.level2 {
    background-color: rgba(46, 204, 113, 0.4);
}

.heatmap-cell.level3 {
    background-color: rgba(46, 204, 113, 0.6);
}

.heatmap-cell.level4 {
    background-color: var(--primary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    animation: fadeIn 0.3s ease;
    padding: var(--spacing-lg);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    animation: slideUp 0.3s ease;
}

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

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

.modal-header h2 {
    margin: 0;
    color: var(--primary);
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

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

/* Form */
form {
    padding: var(--spacing-lg);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Icon Picker */
.icon-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.icon-btn {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border-color);
    background-color: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.icon-btn:hover {
    border-color: var(--primary);
    background-color: rgba(46, 204, 113, 0.1);
    transform: scale(1.1);
}

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

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-actions button {
    flex: 1;
}

#delete-btn {
    background-color: var(--danger) !important;
    color: #fff !important;
}

#delete-btn:hover {
    background-color: #e55050 !important;
}

/* Premium Modal */
.premium-modal {
    max-width: 600px;
}

.premium-content {
    padding: var(--spacing-xl);
    text-align: center;
}

.premium-result {
    background-color: var(--dark-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border: 1px solid var(--primary);
    text-align: left;
    max-height: 300px;
    overflow-y: auto;
}

.premium-result.hidden {
    display: none;
}

.analysis-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

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

/* Ad Slots */
.ad-slot {
    padding: var(--spacing-lg);
    margin: var(--spacing-lg);
    background-color: rgba(46, 204, 113, 0.05);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md);
    }

    .app-title {
        font-size: var(--font-size-lg);
    }

    .subtitle {
        display: none;
    }

    .tabs {
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }

    .tab-btn {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }

    .today-container,
    .habits-container,
    .stats-container,
    .heatmap-container {
        padding: var(--spacing-md);
    }

    .daily-challenge {
        padding: var(--spacing-lg);
    }

    .today-header {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-add-habit {
        width: 100%;
        margin-top: var(--spacing-md);
    }

    .empty-state-emoji {
        font-size: 4rem;
    }

    .habit-item {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .completion-stats {
        grid-template-columns: 1fr;
    }

    .templates-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .heatmap-controls {
        flex-direction: column;
    }

    .heatmap-controls select,
    .heatmap-controls button {
        width: 100%;
    }

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

    .modal-content {
        max-width: 90vw;
    }

    .badges-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --font-size-xl: 1.25rem;
        --font-size-2xl: 1.5rem;
    }

    .app-title {
        font-size: var(--font-size-lg);
    }

    .daily-quote {
        font-size: var(--font-size-base);
    }

    .tab-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .habit-item {
        padding: var(--spacing-md);
    }

    .stat-value {
        font-size: var(--font-size-xl);
    }

    .templates-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .heatmap-grid {
        grid-template-columns: repeat(52, 1fr);
        min-width: 100%;
    }

    .heatmap-cell {
        width: 12px;
        height: 12px;
    }
}

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

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

.mt {
    margin-top: var(--spacing-lg);
}

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

/* Animations */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading {
    animation: spin 1s linear infinite;
}

/* Pulse animation for CTA buttons on first visit */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.6); }
    70% { box-shadow: 0 0 0 14px rgba(46, 204, 113, 0); }
    100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}

.btn-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Onboarding tooltip for first-time users */
.onboarding-tooltip {
    position: relative;
}

.onboarding-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    top: -44px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #000;
    padding: 6px 14px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    white-space: nowrap;
    pointer-events: none;
    animation: tooltipBounce 1.5s ease-in-out infinite;
    z-index: 10;
}

.onboarding-tooltip::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--primary);
    pointer-events: none;
    animation: tooltipBounce 1.5s ease-in-out infinite;
    z-index: 10;
}

@keyframes tooltipBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-6px); }
}

/* Onboarding highlight ring on first habit checkbox */
@keyframes ringPulse {
    0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.5); }
    50% { box-shadow: 0 0 0 10px rgba(46, 204, 113, 0); }
    100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}

.habit-checkbox.onboarding-highlight {
    animation: ringPulse 1.8s ease-in-out infinite;
}

/* Welcome banner for first-time users */
.welcome-banner {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.15) 0%, rgba(46, 204, 113, 0.05) 100%);
    border: 1px solid rgba(46, 204, 113, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.welcome-banner-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.welcome-banner-steps {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.welcome-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 80px;
}

.welcome-step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.welcome-step-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.3;
}

.welcome-dismiss {
    margin-top: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    text-decoration: underline;
    padding: var(--spacing-sm);
    min-height: 44px;
}

.welcome-dismiss:hover {
    color: var(--text-primary);
}

/* Print Styles */
/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark, var(--bg-primary, var(--background, #0f0f23)));
}

::-webkit-scrollbar-thumb {
    background: #1abc9c;
    border-radius: 5px;
    border: 2px solid var(--bg-dark, var(--bg-primary, var(--background, #0f0f23)));
}

::-webkit-scrollbar-thumb:hover {
    background: #47c9af;
    opacity: 0.8;
}

/* Selection Color */
::selection {
    background: #1abc9c;
    color: white;
}

::-moz-selection {
    background: #1abc9c;
    color: white;
}

/* Focus Visible */
button:focus-visible,
a:focus-visible,
input:focus-visible,
[role="button"]:focus-visible {
    outline: 3px solid #1abc9c;
    outline-offset: 2px;
}

@media print {
    .header,
    .tabs,
    .btn-icon,
    .language-selector,
    .habit-actions {
        display: none;
    }

    .heatmap-container {
        max-width: 100%;
    }
}

/* Accessibility: reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}