/* Brand Colors */
:root {
    --color-primary: #2563EB;
    --color-accent-green: #16A34A;
    --color-accent-purple: #7C3AED;
    --color-text-dark: #1F2937;
    --color-text-secondary: #6B7280;
    --color-bg-light: #F3F4F6;
    --color-white: #FFFFFF;
    --color-bg-dark: #111827;
    --color-surface-dark: #1F2937;
    --color-text-light: #F9FAFB;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-headline: 32px;
    --font-size-section: 24px;
    --font-size-body: 16px;
    --font-size-caption: 14px;
    --font-size-small: 12px;
    
    /* Touch targets */
    --touch-target-min: 48px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-dark);
}

h1 {
    font-size: var(--font-size-headline);
}

h2 {
    font-size: var(--font-size-section);
}

h3 {
    font-size: 20px;
}

p {
    margin-bottom: var(--spacing-md);
}

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

a:hover {
    opacity: 0.8;
}

a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

code {
    background-color: var(--color-bg-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    min-height: var(--touch-target-min);
    font-size: var(--font-size-body);
    font-weight: 500;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    line-height: 1.5;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    opacity: 1;
}

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

.btn-secondary:hover {
    background-color: #e5e7eb;
    opacity: 1;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-purple) 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.hero-logo {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-image {
    width: 120px;
    height: 120px;
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.hero-tagline {
    font-size: var(--font-size-section);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.hero-subheadline {
    font-size: var(--font-size-body);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
}

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

.hero .btn-primary:hover {
    background-color: var(--color-bg-light);
}

/* Sections */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-alt {
    background-color: var(--color-bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-section);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

/* Why Section */
.why-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.why-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.why-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.why-item h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

/* Installation Steps */
.install-steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 20px;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.step-content ol,
.step-content ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.step-content li {
    margin-bottom: var(--spacing-sm);
}

.step-note {
    font-size: var(--font-size-caption);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: var(--spacing-sm);
}

/* Slow Connection Tips Section */
.tips-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.tip-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--color-primary);
}

.tip-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
}

.tip-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 18px;
}

.tip-card p {
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.tip-card ul {
    list-style: none;
    margin-left: 0;
    margin-top: var(--spacing-sm);
}

.tip-card li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-caption);
}

.tip-card li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: 18px;
}

.connection-warning {
    background-color: var(--color-accent-green);
    color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-top: var(--spacing-xl);
    text-align: center;
}

.connection-warning h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.connection-warning ol {
    color: rgba(255, 255, 255, 0.95);
}

.connection-warning li {
    margin-bottom: var(--spacing-sm);
}

/* Download Section */
.download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.download-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

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

.download-info {
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.download-description {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-dark);
}

.download-requirements {
    font-size: var(--font-size-caption);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-md);
}

/* Screenshots Section */
.screenshots-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

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

.screenshot-thumb {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.screenshot-thumb:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.screenshot-caption {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-caption);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Lightbox Modal */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    overflow: auto;
    animation: fadeIn 0.3s;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90vh;
    width: auto;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: var(--color-white);
    font-size: 48px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10000;
    line-height: 1;
    transition: opacity 0.2s;
}

.lightbox-close:hover {
    opacity: 0.7;
}

.lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-white);
    font-size: var(--font-size-body);
    text-align: center;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 12px 24px;
    border-radius: 8px;
    max-width: 90%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Requirements Section */
.requirements-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.requirement-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.requirement-card ul {
    list-style: none;
    margin-left: 0;
}

.requirement-card li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.requirement-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent-green);
    font-weight: bold;
}

/* Footer */
.footer {
    background-color: var(--color-text-dark);
    color: var(--color-text-light);
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
    color: var(--color-white);
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-caption);
}

/* Responsive Design - Tablet */
@media (min-width: 768px) {
    .hero-title {
        font-size: 56px;
    }
    
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tips-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .requirements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Responsive Design - Desktop */
@media (min-width: 1024px) {
    .content-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .why-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tips-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .download-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero {
        padding: 80px var(--spacing-md);
    }
}

/* RTL Support */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .container {
    text-align: right;
}

[dir="rtl"] .hero {
    text-align: right;
}

[dir="rtl"] .hero-logo {
    justify-content: flex-end;
}

[dir="rtl"] .content-grid,
[dir="rtl"] .why-grid,
[dir="rtl"] .tips-grid,
[dir="rtl"] .screenshots-grid,
[dir="rtl"] .download-grid,
[dir="rtl"] .requirements-grid {
    direction: rtl;
}

[dir="rtl"] .footer-content {
    direction: rtl;
}

[dir="rtl"] .footer-links {
    text-align: right;
}

[dir="rtl"] .footer-links ul {
    padding-right: 0;
    padding-left: 0;
}

[dir="rtl"] .step {
    flex-direction: row-reverse;
}

[dir="rtl"] .step-content {
    text-align: right;
}

[dir="rtl"] .step-content ol,
[dir="rtl"] .step-content ul {
    padding-right: 20px;
    padding-left: 0;
}

[dir="rtl"] .link-disclaimer {
    display: inline-block;
    margin-right: 4px;
    margin-left: 0;
}

[dir="rtl"] .footer-language {
    text-align: right;
}

[dir="rtl"] #language-selector {
    direction: rtl;
    text-align: right;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .hero,
    .footer {
        background: white;
        color: black;
    }
    
    .btn {
        border: 1px solid black;
    }
}