/* Global Variables */
:root {
    /* Light theme - серый с красным акцентом */
    --color-bg-light: #f5f3f0;
    --color-bg-secondary-light: #ede9e6;
    --color-text-light: #2a2a2a;
    --color-text-secondary-light: #757575;
    --color-border-light: #d4cfc9;
    --color-accent: #c41e3a;
    --color-accent-hover: #a01730;
    --color-accent-light: #d63a4f;
    
    /* Dark theme - тёмно-красный + серый */
    --color-bg-dark: #1a1412;
    --color-bg-secondary-dark: #2a2218;
    --color-text-dark: #e8e6e1;
    --color-text-secondary-dark: #a99f96;
    --color-border-dark: #3f3530;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.25rem;
    
    --shadow-sm: 0 2px 8px rgba(196, 30, 58, 0.08);
    --shadow-md: 0 8px 16px rgba(196, 30, 58, 0.12);
    --shadow-lg: 0 16px 32px rgba(196, 30, 58, 0.16);
    
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    color-scheme: light;
}

body.dark-mode {
    --color-bg-light: var(--color-bg-dark);
    --color-bg-secondary-light: var(--color-bg-secondary-dark);
    --color-text-light: var(--color-text-dark);
    --color-text-secondary-light: var(--color-text-secondary-dark);
    --color-border-light: var(--color-border-dark);
    color-scheme: dark;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    background-color: var(--color-bg-light);
    color: var(--color-text-light);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

h3 {
    font-size: 1.75rem;
    font-weight: 700;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary-light);
    line-height: 1.7;
    font-size: 1.05rem;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

/* Navigation Bar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg-light);
    border-bottom: 2px solid var(--color-accent);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-accent);
}

.logo-icon {
    font-size: 2.5rem;
    animation: bounce 2s ease-in-out infinite;
}

.logo-text {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    font-weight: 600;
    color: var(--color-text-light);
    position: relative;
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

/* Theme Toggle */
.theme-toggle {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(20deg);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Main Content */
#main-content {
    display: flex;
    flex-direction: column;
}

/* Sections */
.section {
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
}

.section:first-of-type {
    border-top: none;
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    animation: slideUp 0.6s ease-out;
    font-size: 2.5rem;
    color: var(--color-accent);
    position: relative;
    padding-bottom: var(--spacing-xl);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg-secondary-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-content {
    text-align: center;
    animation: slideDown 0.8s ease-out;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: slideUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.75rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    animation: slideUp 0.8s ease-out 0.1s backwards;
}

.hero-description {
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    animation: slideUp 0.8s ease-out 0.2s backwards;
}

.hero-description p {
    font-size: 1.2rem;
    color: var(--color-text-secondary-light);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 0.8s ease-out 0.3s backwards;
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--color-accent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-normal), height var(--transition-normal);
    z-index: -1;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
}

.btn-secondary:hover {
    background-color: rgba(196, 30, 58, 0.1);
    border-color: var(--color-accent-hover);
    color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0);
}

body.dark-mode .btn-primary {
    background-color: var(--color-accent);
    color: var(--color-bg-dark);
}

body.dark-mode .btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-bg-secondary-light) 0%, var(--color-bg-light) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
    animation-fill-mode: both;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    transition: left var(--transition-normal);
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    left: 100%;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    animation: bounce 2s ease-in-out infinite;
}

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

.feature-card p {
    color: var(--color-text-secondary-light);
    margin-bottom: 0;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text p {
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.stat {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: var(--radius-lg);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-md);
    animation: slideUp 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Release Item */
.release-item {
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-bg-secondary-light) 0%, var(--color-bg-light) 100%);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-accent);
    animation: slideUp 0.6s ease-out;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.release-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.release-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-lg);
}

.release-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.release-date {
    font-size: 0.95rem;
    color: var(--color-text-secondary-light);
    font-weight: 500;
}

.release-tag {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.release-body {
    color: var(--color-text-secondary-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
    line-height: 1.7;
}

.release-link {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.release-link:hover {
    opacity: 0.7;
}

.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary-light);
}

/* Documentation Section */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.doc-card {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-secondary-light) 0%, var(--color-bg-light) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

.doc-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.doc-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.doc-card:hover::before {
    transform: scaleX(1);
}

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

.doc-card p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary-light);
    font-size: 1rem;
}

.doc-link {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 700;
    transition: all var(--transition-fast);
    position: relative;
}

.doc-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-normal);
}

.doc-link:hover::after {
    width: 100%;
}

/* FAQ Section */
.faq-list {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-secondary-light) 0%, var(--color-bg-light) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    animation: slideUp 0.6s ease-out;
}

.faq-item:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.faq-item summary {
    font-weight: 700;
    font-size: 1.2rem;
    user-select: none;
    outline: none;
    color: var(--color-accent);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform var(--transition-normal);
    color: var(--color-accent);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item[open] summary {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-accent);
}

.faq-item p {
    margin: 0;
    color: var(--color-text-secondary-light);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--color-bg-secondary-light) 0%, var(--color-bg-light) 100%);
    border-top: 3px solid var(--color-accent);
    padding: var(--spacing-2xl) var(--spacing-xl);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    font-size: 1.1rem;
}

.footer-section p {
    color: var(--color-text-secondary-light);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

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

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

.footer-section a {
    color: var(--color-text-secondary-light);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.footer-section a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-normal);
}

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

.footer-section a:hover::before {
    width: 100%;
}

.footer-bottom {
    border-top: 2px solid var(--color-accent);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--color-text-secondary-light);
    font-size: 0.95rem;
    font-weight: 500;
}

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

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

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

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

@keyframes float {
    0%, 100% {
        transform: translate(0, 0px);
    }
    50% {
        transform: translate(0, 20px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(196, 30, 58, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(196, 30, 58, 0.6);
    }
}

/* Responsive */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .navbar-container {
        gap: var(--spacing-lg);
    }
    
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .navbar-container {
        padding: var(--spacing-md);
    }
    
    .nav-menu {
        gap: var(--spacing-xs);
        font-size: 0.9rem;
    }
    
    .logo-text {
        display: none;
    }
    
    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: var(--spacing-md);
        font-size: 0.95rem;
        width: 100%;
    }
}