/* ============================================
   ATG APP - Main Stylesheet
   Created: October 2025
   Content Date: February 2025
   ============================================ */

/* ============================================
   CSS VARIABLES - Единая цветовая палитра
   ============================================ */
:root {
    /* Primary Colors - Основная синяя схема */
    --color-primary-dark: #0f2740;
    --color-primary-blue: #1a4d6f;
    --color-primary-light: #2a5d7f;
    
    /* Accent Colors */
    --color-accent-gold: #ffd700;
    --color-accent-gold-light: #ffed4e;
    --color-accent-orange: #ff6f00;
    --color-accent-orange-light: #ff8f00;
    
    /* Text Colors */
    --color-text-primary: #333;
    --color-text-secondary: #555;
    --color-text-muted: #666;
    --color-text-light: #999;
    --color-text-white: #ffffff;
    
    /* Background Colors */
    --color-bg-body: #f5f5f5;
    --color-bg-white: #ffffff;
    --color-bg-light: #f9f9f9;
    --color-bg-card: #ffffff;
    
    /* Border Colors */
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    
    /* Status Colors */
    --color-success: #00b894;
    --color-success-bg: #e8f5e9;
    --color-success-dark: #2e7d32;
    --color-warning: #ff6b00;
    --color-error: #d32f2f;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0f2740 0%, #1a4d6f 100%);
    --gradient-accent: linear-gradient(135deg, #ff6f00 0%, #ff8f00 100%);
    --gradient-light: linear-gradient(135deg, #ffd700 0%, #ff8f00 100%);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-secondary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
    /* Font Sizes */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 60px;
    --spacing-3xl: 80px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --radius-xl: 20px;
    --radius-full: 50px;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 3px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 5px 20px rgba(0,0,0,0.1);
    --shadow-xl: 0 10px 30px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 2000;
    --z-tooltip: 3000;
    
    /* Container */
    --container-max-width: 1200px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* ============================================
   AGE RESTRICTION BANNER
   ============================================ */
.age-restriction {
    background: var(--color-warning);
    color: var(--color-text-white);
    text-align: center;
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* ============================================
   HEADER
   ============================================ */
header {
    background: var(--gradient-primary);
    color: var(--color-text-white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--color-accent-gold);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.logo:hover {
    color: var(--color-accent-gold-light);
}

/* ============================================
   NAVIGATION
   ============================================ */
nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: var(--color-text-white);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-normal);
    position: relative;
}

nav a:hover {
    color: var(--color-accent-gold);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gold);
    transition: width var(--transition-normal);
}

nav a:hover::after {
    width: 100%;
}

/* ============================================
   BREADCRUMBS
   ============================================ */
.breadcrumbs {
    background: var(--color-bg-white);
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumbs ul {
    display: flex;
    list-style: none;
    gap: 10px;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.breadcrumbs li:not(:last-child):after {
    content: "›";
    margin-left: 10px;
    color: var(--color-text-light);
}

.breadcrumbs a {
    color: var(--color-primary-dark);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.breadcrumbs a:hover {
    text-decoration: underline;
    color: var(--color-primary-blue);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: var(--gradient-primary);
    color: var(--color-text-white);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: #b3d9f2;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 40px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: bold;
    color: var(--color-accent-gold);
    display: block;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: #b3d9f2;
    margin-top: 5px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: 15px 40px;
    font-size: var(--font-size-lg);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--color-accent-gold);
    color: var(--color-primary-dark);
}

.btn-primary:hover {
    background: var(--color-accent-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 215, 0, 0.4);
}

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

.btn-secondary:hover {
    background: var(--color-text-white);
    color: var(--color-primary-dark);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: 40px;
    flex-wrap: wrap;
}

/* ============================================
   SECTIONS
   ============================================ */
.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: 40px;
    color: var(--color-primary-dark);
    text-align: center;
}

.trust-section {
    background: var(--color-bg-white);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.trust-badges-container {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.trust-badges-img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-body);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: var(--color-bg-white);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: 10px;
    color: var(--color-primary-dark);
}

.feature-card p {
    color: var(--color-text-muted);
}

/* ============================================
   SCREENSHOTS
   ============================================ */
.screenshots-section {
    background: var(--color-bg-light);
    padding: var(--spacing-3xl) 0;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.screenshot-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.screenshot-card:hover {
    transform: translateY(-10px);
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-caption {
    padding: var(--spacing-md);
    text-align: center;
}

.screenshot-caption h3 {
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

.screenshot-caption p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   STEP CARDS
   ============================================ */
.download-steps {
    background: var(--color-bg-white);
    padding: var(--spacing-3xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.step-card {
    background: var(--color-bg-light);
    padding: 30px;
    border-radius: var(--radius-lg);
    position: relative;
    transition: transform var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-5px);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    color: var(--color-text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: bold;
}

.step-card h3 {
    margin-top: var(--spacing-md);
    color: var(--color-primary-dark);
    font-size: var(--font-size-xl);
    margin-bottom: 15px;
}

/* ============================================
   COMPARISON TABLE
   ============================================ */
.comparison-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-white);
}

.comparison-table {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-top: 40px;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.comparison-table thead {
    background: var(--gradient-primary);
    color: var(--color-text-white);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: center;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-table tr {
    border-bottom: 1px solid var(--color-border);
}

.check {
    color: var(--color-success);
    font-size: var(--font-size-2xl);
}

.cross {
    color: #ccc;
    font-size: var(--font-size-2xl);
}

/* ============================================
   REVIEWS
   ============================================ */
.reviews {
    background: var(--color-bg-light);
    padding: var(--spacing-3xl) 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.review-card {
    background: var(--color-bg-white);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.reviewer-name {
    font-weight: 600;
    color: var(--color-primary-dark);
}

.stars {
    color: var(--color-accent-gold);
    font-size: var(--font-size-lg);
}

.review-date {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 15px;
}

/* ============================================
   SEO CONTENT
   ============================================ */
.seo-content {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-white);
}

.seo-content h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary-dark);
    margin-bottom: 30px;
    text-align: center;
}

.seo-content h3 {
    font-size: var(--font-size-2xl);
    color: var(--color-primary-blue);
    margin: 30px 0 15px 0;
}

.seo-content p {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.seo-content ul,
.seo-content ol {
    margin: var(--spacing-md) 0 var(--spacing-md) 30px;
    color: var(--color-text-secondary);
}

.seo-content li {
    margin-bottom: 12px;
    line-height: 1.8;
}

.content-box {
    background: var(--color-bg-light);
    padding: 30px;
    border-radius: var(--radius-md);
    margin: 30px 0;
    border-left: 4px solid var(--color-primary-dark);
}

.highlight-box {
    background: var(--gradient-primary);
    color: var(--color-text-white);
    padding: 30px;
    border-radius: var(--radius-lg);
    margin: 30px 0;
}

.highlight-box h3 {
    color: var(--color-accent-gold);
}

/* ============================================
   FAQ
   ============================================ */
.faq {
    background: var(--color-bg-white);
    padding: var(--spacing-3xl) 0;
}

.faq-container {
    max-width: 800px;
    margin: 40px auto 0;
}

.faq-item {
    background: var(--color-bg-light);
    margin-bottom: 15px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md);
    font-weight: 600;
    color: var(--color-primary-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-normal);
}

.faq-question:hover {
    background: #f0f0f0;
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background: var(--color-primary-dark);
    color: var(--color-text-white);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--color-accent-gold);
    margin-bottom: var(--spacing-md);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #b3d9f2;
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-section a:hover {
    color: var(--color-accent-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-primary-blue);
    color: #b3d9f2;
    font-size: var(--font-size-sm);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 32px;
        --font-size-4xl: 28px;
        --font-size-3xl: 24px;
        --spacing-3xl: 60px;
        --spacing-2xl: 40px;
    }
    
    .hero h1 {
        font-size: var(--font-size-4xl);
    }
    
    nav ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .features-grid,
    .screenshots-grid,
    .steps-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-muted);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

/* ============================================
   ANIMATION CLASSES
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    header,
    footer,
    .cta-buttons,
    .age-restriction {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}