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

:root {
    /* Safe Area Variables for iPhone */
    --safe-area-inset-top: constant(safe-area-inset-top);
    --safe-area-inset-right: constant(safe-area-inset-right);
    --safe-area-inset-bottom: constant(safe-area-inset-bottom);
    --safe-area-inset-left: constant(safe-area-inset-left);
    
    /* For newer iOS versions */
    --safe-area-inset-top: env(safe-area-inset-top);
    --safe-area-inset-right: env(safe-area-inset-right);
    --safe-area-inset-bottom: env(safe-area-inset-bottom);
    --safe-area-inset-left: env(safe-area-inset-left);
    
    /* Primary Colors - Blue Theme */
    --primary-color: #1a3f67;
    --primary-light: #2d5a8a;
    --primary-dark: #0f2940;
    
    /* Ukrainian Colors */
    --secondary-color: #0057b7;
    --secondary-light: #ffd700;
    
    /* Text Colors */
    --text-dark: #1a1a1a;
    --text-light: #666;
    --text-muted: #999;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-alt: #f5f7fa;
    --bg-dark: #1a1a1a;
    
    /* Border and Shadow */
    --border-light: #e9ecef;
    --border-primary: rgba(26, 63, 103, 0.2);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 4px 20px rgba(26, 63, 103, 0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2rem;
    --font-size-4xl: 2.5rem;
}

html {
    /* scroll-behavior отключен для кастомного плавного скролла */
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #ffffff;
    font-size: 1rem;
    overflow-x: hidden;
    /* iOS specific improvements */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    /* iPhone XR safe area support */
    padding-left: var(--safe-area-inset-left);
    padding-right: var(--safe-area-inset-right);
}

/* Общие стили для страниц */
.page {
  transition: opacity 0.5s ease-in-out; /* Плавное изменение прозрачности за 0.5 секунды */
  opacity: 1;
}

/* Страница исчезает */
.page.fade-out {
  opacity: 0;
}

/* Страница появляется (можно использовать для новой страницы) */
.page.fade-in {
  opacity: 1; /* Если она изначально была opacity: 0 */
}

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

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-xl);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

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

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: white;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
    color: var(--text-white);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

    /* Sections */
.section {
    padding: 5rem 0;
}

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

.section-title {
    font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--text-dark);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 8rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.page-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    opacity: 0.9;
    font-weight: 400;
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

/* Coming Soon Styles */
.coming-soon {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--border-primary);
    margin: 2rem 0;
}

.coming-soon h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.coming-soon p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

/* Mobile container optimizations */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .container-fluid {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .container-fluid {
        padding: 0 0.75rem;
    }
}

@media (max-width: 375px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .container-fluid {
        padding: 0 0.5rem;
    }
}

@media (max-width: 320px) {
    .container {
        padding: 0 0.25rem;
    }
    
    .container-fluid {
        padding: 0 0.25rem;
    }
}

/* iPhone XR specific optimizations */
@media (max-width: 414px) and (min-width: 375px) {
    .page-header {
        padding-top: calc(8rem + var(--safe-area-inset-top));
    }
    
    .coming-soon {
        margin-bottom: calc(2rem + var(--safe-area-inset-bottom));
        padding: 3rem 1.5rem calc(3rem + var(--safe-area-inset-bottom));
    }
    
    .coming-soon h2 {
        font-size: 2.2rem;
    }
    
    .coming-soon p {
        font-size: 1.1rem;
        line-height: 1.5;
    }
}

/* iPhone XR landscape adjustments */
@media (max-width: 812px) and (min-width: 376px) and (orientation: landscape) {
    .page-header {
        padding: 6rem var(--safe-area-inset-left) 3rem var(--safe-area-inset-right);
    }
    
    .coming-soon {
        margin: 1rem var(--safe-area-inset-left) 1rem var(--safe-area-inset-right);
        padding: 2rem 1.5rem;
    }
    
    .coming-soon h2 {
        font-size: 2rem;
    }
    
    .coming-soon p {
        font-size: 1rem;
    }
}

/* Loading skeleton styles for news */
.news-loading-skeleton {
    display: flex;
    gap: 2rem;
    overflow: hidden;
    animation: fadeInSkeleton 0.3s ease-out;
}

.news-card-skeleton {
    min-width: 300px;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    animation: slideInSkeleton 0.5s ease-out;
}

.skeleton-image {
    height: 200px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

.skeleton-content {
    padding: 1.5rem;
}

.skeleton-category, .skeleton-title, .skeleton-excerpt, .skeleton-link {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.skeleton-category { 
    width: 30%; 
    height: 0.8rem; 
}

.skeleton-title { 
    width: 90%; 
    height: 1.2rem; 
}

.skeleton-excerpt { 
    width: 100%; 
    height: 1rem;
}

.skeleton-link { 
    width: 40%; 
    height: 1rem;
}

@keyframes skeleton-loading {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

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

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

/* Error state styles */
.news-error {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    text-align: center;
    color: #666;
    flex-direction: column;
    gap: 1rem;
    background: #f8f9fa;
    border-radius: 12px;
    margin: 1rem 0;
}

.news-error button {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.news-error button:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

/* ====== SMOOTH SCROLL STYLES ====== */
.smooth-scroll {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    will-change: transform;
    /* Hardware acceleration */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    z-index: 1;
}

.smooth-scrollbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    z-index: -1;
}

/* Ensure body doesn't interfere with smooth scroll */
body.smooth-scroll-active {
    overflow-x: hidden;
}

/* Disable smooth scroll for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    .smooth-scroll {
        position: static !important;
        transform: none !important;
        -webkit-transform: none !important;
    }
    
    .smooth-scrollbar {
        display: none !important;
    }
}

/* Disable custom smooth scroll on mobile devices */
@media (max-width: 768px), (hover: none) and (pointer: coarse) {
    .smooth-scroll {
        position: static !important;
        transform: none !important;
        -webkit-transform: none !important;
    }
    
    .smooth-scrollbar {
        display: none !important;
    }
    
    /* Enable native smooth scroll */
    html {
        scroll-behavior: smooth;
    }
    
    /* Optimize scrolling on mobile */
    body {
        -webkit-overflow-scrolling: touch;
    }
}