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

:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --error-color: #ef4444;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --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);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    font-size: var(--font-size-base);
    overflow-x: hidden;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Screen reader only class */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* Header and Navigation */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.nav__logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
}

.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo-link:hover h1 {
    color: var(--primary-dark);
}

.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo-link:hover h1 {
    color: var(--primary-dark);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav__link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav__link:hover,
.nav__link.active {
    color: var(--primary-color);
}

.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    background: none;
    border: none;
    padding: var(--spacing-xs);
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-600);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.page-header__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.page-header__subtitle {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Breadcrumb Navigation */
.breadcrumb {
    margin-top: var(--spacing-lg);
}

.breadcrumb ol {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.breadcrumb li:not(:last-child)::after {
    content: '›';
    margin-left: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb a:hover {
    color: var(--white);
}

.breadcrumb li[aria-current="page"] {
    color: var(--white);
    font-weight: 600;
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero__title {
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero__features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--gray-700);
}

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

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* App Preview */
.app-preview {
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-window {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    width: 100%;
    max-width: 400px;
}

.app-header {
    background: var(--gray-100);
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
}

.app-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.app-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-400);
}

.app-buttons span:nth-child(1) {
    background: #ff5f56;
}

.app-buttons span:nth-child(2) {
    background: #ffbd2e;
}

.app-buttons span:nth-child(3) {
    background: #27ca3f;
}

.app-content {
    padding: var(--spacing-lg);
    text-align: center;
}

.text-input {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
}

.text-input p {
    font-size: var(--font-size-lg);
    color: var(--gray-800);
    font-weight: 500;
}

.braille-output {
    padding: var(--spacing-md);
    background: var(--primary-color);
    border-radius: var(--radius-md);
}

.braille-output p {
    font-size: var(--font-size-xl);
    color: var(--white);
    font-weight: 600;
    letter-spacing: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    min-width: 140px;
}

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

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

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

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

.btn--download {
    background-color: var(--gray-100);
    color: var(--gray-800);
    border: 2px solid var(--gray-200);
}

.btn--download:hover {
    background-color: var(--gray-200);
    border-color: var(--gray-300);
    transform: translateY(-1px);
}

/* Section Styles */
.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.about__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.about__text p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.accessibility-info {
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
    margin-top: var(--spacing-xl);
}

.accessibility-info h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.about__stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.stat__number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.features__categories {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.feature-tab {
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-600);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    font-size: var(--font-size-sm);
}

.feature-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.feature-tab.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.feature-content {
    display: none;
}

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

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card__icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.feature-card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    text-align: center;
}

.feature-demo {
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

/* Feature Demo Styles */
.demo-input,
.demo-output {
    margin-bottom: var(--spacing-md);
}

.demo-input label,
.demo-output label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.demo-input input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-family: inherit;
}

.braille-result {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: var(--font-size-lg);
    text-align: center;
    letter-spacing: 2px;
}

/* Print Preview Demo */
.print-preview {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.print-header {
    background: var(--gray-200);
    padding: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
    text-align: center;
    font-size: var(--font-size-sm);
}

.print-content {
    padding: var(--spacing-sm);
    background: var(--white);
}

.print-line {
    font-family: monospace;
    color: var(--gray-800);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

/* Format Support Demo */
.format-support {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.format-item {
    background: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

/* Settings Preview Demo */
.settings-preview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
}

.setting-item span {
    color: var(--gray-700);
    font-weight: 500;
}

.setting-item select {
    padding: var(--spacing-xs);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-size: var(--font-size-sm);
}

/* Language Demo */
.language-demo {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.lang-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

.lang-item span {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
}

.lang-item .braille {
    font-family: monospace;
    color: var(--primary-color);
    font-weight: 600;
}

/* Embosser List Demo */
.embosser-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.embosser-item {
    background: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

/* Offline Indicator Demo */
.offline-indicator {
    text-align: center;
    padding: var(--spacing-md);
}

.offline-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.offline-text {
    color: var(--success-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* Batch Preview Demo */
.batch-preview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.batch-item {
    background: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.batch-progress {
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    height: 8px;
}

.progress-bar {
    background: var(--primary-color);
    height: 100%;
    transition: width 0.3s ease;
}

/* Shortcuts Preview Demo */
.shortcuts-preview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.shortcut-item kbd {
    background: var(--gray-200);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.75em;
    color: var(--gray-700);
}

.shortcut-item span {
    color: var(--gray-700);
}

/* Screen Reader Demo */
.screen-reader-demo {
    text-align: center;
    padding: var(--spacing-md);
}

.sr-indicator {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.sr-text {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* Contrast Demo */
.contrast-demo {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
}

.contrast-option {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.2s ease;
}

.contrast-option.active {
    background: var(--primary-color);
    color: var(--white);
}

/* Zoom Demo */
.zoom-demo {
    text-align: center;
}

.zoom-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.zoom-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: bold;
    color: var(--gray-700);
    transition: all 0.2s ease;
}

.zoom-btn:hover {
    background: var(--gray-100);
}

.zoom-level {
    font-weight: 600;
    color: var(--gray-700);
    min-width: 50px;
}

/* Platform Demo */
.platform-demo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

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

.platform-info {
    text-align: left;
}

.platform-info div:first-child {
    font-weight: 600;
    color: var(--gray-800);
    font-size: var(--font-size-sm);
}

.platform-info .version {
    color: var(--gray-600);
    font-size: var(--font-size-xs);
}

/* API Demo */
.api-demo {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.api-endpoint {
    background: var(--gray-800);
    color: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: var(--font-size-sm);
    text-align: center;
}

/* Interactive Demo Section */
.features__demo {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.features__demo h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-2xl);
}

.features__demo p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.interactive-demo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.demo-input-section,
.demo-output-section {
    text-align: left;
}

.demo-input-section label,
.demo-output-section label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.demo-input-section textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    resize: vertical;
    margin-bottom: var(--spacing-md);
    transition: border-color 0.2s ease;
}

.demo-input-section textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.demo-braille-output {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: monospace;
    font-size: var(--font-size-lg);
    letter-spacing: 2px;
    line-height: 1.5;
}

.demo-braille-output .placeholder {
    color: var(--gray-200);
    font-style: italic;
}

/* Call to Action Section */
.features__cta {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.features__cta h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-2xl);
}

.features__cta p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Downloads Section */
.downloads {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.downloads__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.download-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.download-card__icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.download-card h3 {
    font-size: var(--font-size-xl);
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.download-card__version {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.download-card__requirements {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

:dir(rtl) .download-card__requirements {
  text-align: right;
}


.download-card__requirements li {
    padding: var(--spacing-xs) 0;
    color: var(--gray-600);
    position: relative;
    padding-left: var(--spacing-lg);
}

.download-card__requirements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.downloads__info {
    background: var(--gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.downloads__info h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.downloads__info p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Notes Section */
.notes {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.notes__form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form__label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
}

.required {
    color: var(--error-color);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color 0.2s ease;
}

.form__input:focus,
.form__textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: var(--gray-400);
}

/* Success Message */
.notes__success {
    max-width: 600px;
    margin: 0 auto;
}

.success-message {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--white);
    border-radius: var(--radius-lg);
}

.success-icon {
    font-size: var(--font-size-4xl);
    color: var(--success-color);
    margin-bottom: var(--spacing-md);
}

.success-message h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.success-message p {
    color: var(--gray-600);
}

/* Footer */
.footer {
    background-color: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    font-family: var(--font-family);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__section h3,
.footer__section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer__section p {
    color: var(--gray-300);
    line-height: 1.6;
}

.footer__section ul {
    list-style: none;
}

.footer__section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer__section ul li a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer__section ul li a:hover {
    color: var(--white);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1.5rem;
}

.lang-btn {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    color: #333;
    transition: color 0.3s;
    text-decoration: none;
}

.lang-btn:hover {
    color: #0073e6;
    text-decoration: underline;
}

/* Desktop language switcher */
.desktop-lang-switcher {
    display: flex;
}

/* Mobile language switcher in menu */
.nav__menu .lang-switcher {
    margin-left: 0;
    margin-top: var(--spacing-lg);
    justify-content: center;
    padding: var(--spacing-md);
    border-top: 1px solid var(--gray-200);
}

/* Hide desktop language switcher on mobile */
@media (max-width: 768px) {
    .desktop-lang-switcher {
        display: none;
    }
    
    .nav__menu .lang-switcher {
        display: flex;
    }
}

/* Show desktop language switcher on larger screens */
@media (min-width: 769px) {
    .nav__menu .lang-switcher {
        display: none;
    }
}


/* Enhanced Mobile Navigation */
.nav__toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    background: none;
    border: none;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-600);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    .nav {
        position: relative;
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        overflow: hidden;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        box-shadow: var(--shadow-xl);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        flex-direction: column;
        padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-xl);
        gap: 0;
        z-index: 1000;
        overflow-y: auto;
        visibility: hidden;
        opacity: 0;
        pointer-events: none;
    }

    .nav__menu.active {
        transform: translateX(0);
        visibility: visible;
        opacity: 1;
        pointer-events: auto;
    }

    .nav__menu li {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .nav__link {
        display: block;
        padding: var(--spacing-lg) var(--spacing-md);
        border-radius: var(--radius-md);
        font-size: var(--font-size-lg);
        font-weight: 600;
        transition: all 0.2s ease;
        border-bottom: none;
    }

    .nav__link:hover {
        background-color: var(--gray-100);
        color: var(--primary-color);
    }

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

    .nav__link.active::after {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }

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

    /* Language switcher mobile */
    .lang-switcher {
        margin-left: 0;
        margin-top: var(--spacing-lg);
        justify-content: center;
    }

    /* Ensure desktop nav menu is completely hidden on mobile */
    .nav__menu {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100vh !important;
        background: rgba(255, 255, 255, 0.98) !important;
        backdrop-filter: blur(10px) !important;
        box-shadow: var(--shadow-xl) !important;
        transform: translateX(-100%) !important;
        transition: transform 0.3s ease !important;
        flex-direction: column !important;
        padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-xl) !important;
        gap: 0 !important;
        z-index: 1000 !important;
        overflow-y: auto !important;
        visibility: hidden !important;
        opacity: 0 !important;
        pointer-events: none !important;
        margin: 0 !important;
        border: none !important;
    }

    .nav__menu.active {
        transform: translateX(0) !important;
        visibility: visible !important;
        opacity: 1 !important;
        pointer-events: auto !important;
    }

    /* Hero section mobile */
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
        line-height: 1.1;
    }

    .hero__description {
        font-size: var(--font-size-base);
        line-height: 1.6;
    }

    .hero__features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .hero__buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .hero__buttons .btn {
        width: 100%;
        max-width: 280px;
    }

    /* About section mobile */
    .about__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .about__stats {
        flex-direction: row;
        justify-content: space-around;
        flex-wrap: wrap;
    }

    .stat {
        flex: 1;
        min-width: 120px;
        margin: var(--spacing-sm);
    }

    /* Downloads section mobile */
    .downloads__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .download-card {
        padding: var(--spacing-lg);
    }

    .download-card__requirements {
        font-size: var(--font-size-sm);
    }

    /* Features section mobile */
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .feature-card {
        padding: var(--spacing-lg);
    }

    .features__categories {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .feature-tab {
        width: 100%;
        max-width: 250px;
        text-align: center;
    }

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

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .cta-buttons .btn {
        width: 100%;
        max-width: 280px;
    }

    /* Notes section mobile */
    .notes__form {
        padding: 0 var(--spacing-sm);
    }

    .form__input,
    .form__textarea {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    /* Footer mobile */
    .footer__content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

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

    /* General mobile adjustments */
    .container {
        padding: 0 var(--spacing-sm);
    }

    .section__title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
    }

    .section__subtitle {
        font-size: var(--font-size-base);
        line-height: 1.5;
    }

    .page-header__title {
        font-size: var(--font-size-4xl);
        line-height: 1.1;
    }

    .page-header__subtitle {
        font-size: var(--font-size-lg);
        line-height: 1.4;
    }

    /* App content mobile */
    .app-content img {
        max-width: 100%;
        height: auto;
    }

    /* Download notes mobile */
    .download-notes {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        padding: var(--spacing-md);
    }

    /* Mobile menu overlay */
    .nav__menu.active::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }

    /* Ensure no horizontal scroll */
    .container {
        max-width: 100%;
        overflow-x: hidden;
    }

    /* Fix any potential overflow issues */
    * {
        box-sizing: border-box;
    }

    /* Ensure no element causes horizontal scroll */
    html, body {
        overflow-x: hidden !important;
        max-width: 100% !important;
    }

    /* Fix navigation container */
    .nav {
        max-width: 100% !important;
        overflow-x: hidden !important;
    }

    /* Ensure all sections don't overflow */
    section {
        max-width: 100% !important;
        overflow-x: hidden !important;
    }

    /* Prevent body scroll when menu is open */
    body.menu-open {
        overflow: hidden;
    }

    /* Mobile app content adjustments */
    .app-content {
        text-align: center;
        margin-top: var(--spacing-lg);
    }

    .app-content img {
        max-width: 200px;
        height: auto;
    }

    /* Mobile form improvements */
    .form__group {
        margin-bottom: var(--spacing-md);
    }

    .form__label {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-xs);
    }

    /* Mobile button improvements */
    .btn {
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

    /* Mobile card improvements */
    .download-card__download-link {
        display: block;
        margin-top: var(--spacing-sm);
        word-break: break-word;
    }

    /* Mobile feature card improvements */
    .feature-card__icon {
        font-size: var(--font-size-3xl);
    }

    /* Mobile stats improvements */
    .about__stats {
        margin-top: var(--spacing-lg);
    }

    /* Mobile footer improvements */
    .footer__section img {
        max-width: 100%;
        height: auto;
    }

    .footer__section h4 {
        margin-top: var(--spacing-md);
    }
}

/* Tablet Styles */
@media (max-width: 1024px) and (min-width: 769px) {
    .container {
        padding: 0 var(--spacing-lg);
    }

    .hero .container {
        gap: var(--spacing-2xl);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

    .about__content {
        gap: var(--spacing-2xl);
    }

    .downloads__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .interactive-demo {
        gap: var(--spacing-lg);
    }

    .footer__content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* Small Mobile Styles */
@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .hero__title {
        font-size: var(--font-size-3xl);
        line-height: 1.1;
    }

    .hero__description {
        font-size: var(--font-size-sm);
    }

    .page-header {
        padding: var(--spacing-2xl) 0;
    }

    .page-header__title {
        font-size: var(--font-size-3xl);
        line-height: 1.1;
    }

    .page-header__subtitle {
        font-size: var(--font-size-base);
    }

    .btn {
        width: 100%;
        min-width: auto;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }

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

    .download-card h3 {
        font-size: var(--font-size-lg);
    }

    .download-card__version {
        font-size: var(--font-size-sm);
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

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

    .feature-card h3 {
        font-size: var(--font-size-lg);
    }

    .feature-card p {
        font-size: var(--font-size-sm);
    }

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

    .section__subtitle {
        font-size: var(--font-size-sm);
    }

    .about__stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .stat {
        min-width: auto;
        margin: 0;
    }

    .stat__number {
        font-size: var(--font-size-3xl);
    }

    .stat__label {
        font-size: var(--font-size-xs);
    }

    .form__input,
    .form__textarea {
        padding: var(--spacing-sm);
        font-size: 16px;
    }

    .nav__logo h1 {
        font-size: var(--font-size-lg);
    }

    .nav__logo img {
        width: 40px;
    }

    .footer__section h3,
    .footer__section h4 {
        font-size: var(--font-size-lg);
    }

    .footer__section p {
        font-size: var(--font-size-sm);
    }

    .download-notes {
        font-size: var(--font-size-xs);
        padding: var(--spacing-sm);
    }

    .download-notes h4 {
        font-size: var(--font-size-sm);
    }
}

/* Touch device improvements */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav__link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    .feature-card {
        transition: transform 0.1s ease;
    }
    
    .feature-card:active {
        transform: scale(0.98);
    }
    
    .download-card {
        transition: transform 0.1s ease;
    }
    
    .download-card:active {
        transform: scale(0.98);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --gray-200: #000000;
        --gray-600: #000000;
        --gray-800: #000000;
    }

    .btn {
        border: 2px solid currentColor;
    }
    
    .nav__link {
        border: 1px solid transparent;
    }
    
    .nav__link:hover,
    .nav__link.active {
        border-color: var(--primary-color);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .feature-card,
    .download-card,
    .btn {
        transition: none;
    }
    
    .nav__menu {
        transition: none;
    }
    
    .nav__toggle span {
        transition: none;
    }
}

/* Print styles */
@media print {

    .header,
    .footer,
    .btn {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .hero,
    .about,
    .features,
    .downloads,
    .notes {
        padding: 1em 0;
        page-break-inside: avoid;
    }

    .font-default {
        font-family: 'Inter', sans-serif;
    }

    /* Arabic font */
    .font-arabic {
        font-family: 'Noto Naskh Arabic', sans-serif;
    }

    /* Highlight active lang */
    .lang-switcher .lang-btn.active {
        font-weight: bold;
        color: #0077cc;
        /* blue highlight */
        text-decoration: underline;
    }

}