/* --- Современные переменные и улучшенная цветовая схема --- */
:root {
    --primary: #667eea; /* Современный синий */
    --primary-dark: #5a67d8;
    --secondary: #764ba2; /* Элегантный фиолетовый */
    --accent: #f093fb; /* Яркий розовый */
    --accent-secondary: #f5576c; /* Коралловый */
    --dark: #0f0f23; /* Глубокий темный */
    --dark-card: #1a1a2e; /* Темный для карточек */
    --light: #f8fafc; /* Современный белый */
    --success: #10b981; /* Современный зеленый */
    --warning: #f59e0b; /* Современный желтый */
    --danger: #ef4444; /* Современный красный */
    --info: #3b82f6; /* Современный синий */
    --text-dark: #1f2937;
    --text-light: #f8fafc;
    --text-muted: #9ca3af;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    
    /* Градиенты */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --gradient-card: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(26, 26, 46, 0.4));
    
    /* Тени */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    font-feature-settings: 'kern' 1, 'liga' 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Добавляем шрифт Inter для современной типографики */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

.container {
    max-width: 1200px;
    margin: auto;
    padding: 0 2rem;
    overflow: hidden;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

ul {
    list-style: none;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.025em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--text-light);
}

h3 {
    font-size: 1.25rem;
    color: var(--text-light);
}

p {
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.7;
}

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

/* --- Современные кнопки --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    margin: 0.5rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    background: var(--glass-bg);
    color: white;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
    border-radius: 16px;
}

/* --- Модернизированная шапка --- */
.landing-header {
    background: rgba(15, 15, 35, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.landing-header.scrolled {
    background: rgba(15, 15, 35, 0.95);
    padding: 0.75rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    color: var(--text-light);
    font-size: 1.75rem;
    font-weight: 800;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo img {
    height: 40px;
    width: auto;
    margin-right: 0.75rem;
    filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.3));
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#language-selector {
    background: var(--glass-bg);
    color: white;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

#language-selector:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-1px);
}

#language-selector option {
    background-color: var(--dark-card);
    color: var(--text-light);
}

/* --- Hero секция с потрясающими эффектами --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(118, 75, 162, 0.2) 0%, transparent 50%),
        var(--dark);
    position: relative;
    overflow: hidden;
}

.hero-section::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 1000 1000"><defs><radialGradient id="a" cx="0.5" cy="0.5" r="0.5"><stop offset="0%" stop-color="%23667eea" stop-opacity="0.1"/><stop offset="100%" stop-color="%23764ba2" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"><animate attributeName="cx" values="200;800;200" dur="20s" repeatCount="indefinite"/></circle><circle cx="800" cy="800" r="120" fill="url(%23a)"><animate attributeName="cy" values="800;200;800" dur="25s" repeatCount="indefinite"/></circle></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    margin-bottom: 1rem;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out, textGlow 3s ease-in-out infinite alternate;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.hero-section .slogan {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--accent);
    margin-bottom: 2rem;
    font-weight: 300;
    animation: fadeInUp 1s ease-out 0.3s both;
    opacity: 0.9;
}

.hero-section p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    color: var(--text-muted);
    animation: fadeInUp 1s ease-out 0.6s both;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.9s both;
}

/* --- Современная About секция --- */
.about-section {
    padding: 6rem 0;
    position: relative;
    background: linear-gradient(180deg, var(--dark) 0%, rgba(26, 26, 46, 0.5) 100%);
}

.about-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-section h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.about-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.promo-image {
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.promo-image:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.promo-image img {
    transition: transform 0.5s ease;
}

.promo-image:hover img {
    transform: scale(1.1);
}

/* --- Потрясающая Features секция --- */
.features-section {
    padding: 6rem 0;
    background: var(--dark-card);
    position: relative;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.features-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: clamp(2rem, 4vw, 3rem);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-item {
    background: var(--gradient-card);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-secondary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.feature-item i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    display: block;
    transition: all 0.3s ease;
}

.feature-item:hover i {
    transform: scale(1.1) rotate(5deg);
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-light);
    font-weight: 600;
}

.feature-item p {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 1rem;
}

/* --- DevLog секция --- */
.devlog-promo-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    position: relative;
    overflow: hidden;
}

.devlog-promo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.devlog-promo-text h2 {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.devlog-promo-text .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.devlog-promo-text .btn i {
    transition: transform 0.3s ease;
}

.devlog-promo-text .btn:hover i {
    transform: translateX(5px);
}

.devlog-promo-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all 0.5s ease;
}

.devlog-promo-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.devlog-promo-image img {
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
}

.devlog-promo-image:hover img {
    transform: scale(1.1);
}

/* --- Современный футер --- */
.landing-footer {
    background: var(--dark);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0 2rem;
    text-align: center;
}

.landing-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.footer-link {
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.footer-link:hover {
    color: var(--primary);
    background: var(--glass-bg);
    transform: translateY(-2px);
}

/* --- Крутые анимации --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes textGlow {
    from {
        text-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
    }
    to {
        text-shadow: 0 0 20px rgba(102, 126, 234, 0.8), 0 0 30px rgba(118, 75, 162, 0.5);
    }
}

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

/* --- Адаптивность --- */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-section {
        padding: 3rem 0;
    }
    
    .about-section .container,
    .devlog-promo-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-item {
        padding: 2rem;
    }
    
    .landing-header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .landing-footer .container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .feature-item {
        padding: 1.5rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .btn-lg {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

/* --- Scrollbar стилизация --- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-secondary);
}

/* --- Дополнительные утилиты --- */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}