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

:root {
    /* Brand Colors */
    --primary-orange: #E4571B;
    --light-orange: #FF6B35;
    --pale-orange: #FFF3E0;
    
    /* Complementary Colors */
    --vibrant-blue: #1B71E4;
    --fresh-green: #4CAF50;
    --purple-accent: #9C27B0;
    
    /* Neutral Colors */
    --dark-text: #2C3E50;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(228, 87, 27, 0.1);
    z-index: 9999;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}


.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.nav-logo .language-switcher {
    margin-left: var(--spacing-lg);
}

.logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-orange);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-orange);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-orange);
    transition: var(--transition-fast);
}

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

.nav-link:focus::after {
    width: 0;
}

/* Language Switcher */
.language-switcher {
    position: relative;
    display: inline-block;
}

.language-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: 1px solid var(--primary-orange);
    color: var(--primary-orange);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition-fast);
}

.language-toggle:hover {
    background: var(--primary-orange);
    color: var(--white);
}

.current-lang {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.lang-arrow {
    width: 16px;
    height: 16px;
    transition: var(--transition-fast);
}

.language-toggle.active .lang-arrow {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px var(--shadow);
    min-width: 160px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
}

.language-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-sm);
    color: var(--dark-text);
}

.lang-option:hover {
    background: var(--pale-orange);
    color: var(--primary-orange);
}

.lang-option.active {
    background: var(--primary-orange);
    color: var(--white);
}

.lang-option:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.nav-cta {
    background: var(--primary-orange);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.nav-cta:hover {
    background: var(--light-orange);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(228, 87, 27, 0.3);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 10001;
    position: relative;
}

/* Show mobile menu toggle on mobile */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-orange);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: var(--radius-sm);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: 0 4px 20px var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
        z-index: 10000;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--light-gray);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-cta {
        margin-top: var(--spacing-md);
        text-align: center;
    }
    
    /* Language switcher stays visible on mobile */
    .nav-logo .language-switcher {
        margin-left: var(--spacing-sm);
    }
    
    .language-dropdown {
        right: 0;
        left: auto;
        transform: translateY(-10px);
    }
    
    .language-dropdown.active {
        transform: translateY(0);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--vibrant-blue) 0%, var(--purple-accent) 50%, var(--primary-orange) 100%);
    padding: 120px 0 var(--spacing-3xl);
    color: var(--white);
    position: relative;
}

.hero::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="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    margin-bottom: var(--spacing-lg);
    height: 40px;
    position: relative;
}

.greeting-text {
    position: absolute;
    top: 0;
    left: 0;
    font-size: var(--font-size-2xl);
    font-weight: 300;
    opacity: 0;
    animation: greetingRotate 10s infinite;
}

.greeting-text:nth-child(1) { animation-delay: 0s; }
.greeting-text:nth-child(2) { animation-delay: 1s; }
.greeting-text:nth-child(3) { animation-delay: 2s; }
.greeting-text:nth-child(4) { animation-delay: 3s; }
.greeting-text:nth-child(5) { animation-delay: 4s; }
.greeting-text:nth-child(6) { animation-delay: 5s; }
.greeting-text:nth-child(7) { animation-delay: 6s; }
.greeting-text:nth-child(8) { animation-delay: 7s; }
.greeting-text:nth-child(9) { animation-delay: 8s; }
.greeting-text:nth-child(10) { animation-delay: 9s; }

@keyframes greetingRotate {
    0%, 10% { opacity: 1; transform: translateY(0); }
    15%, 90% { opacity: 0; transform: translateY(-20px); }
    95%, 100% { opacity: 0; transform: translateY(20px); }
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-slogan {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: #FFD700;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.highlight {
    background: linear-gradient(45deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.cta-button.primary {
    background: var(--white);
    color: var(--primary-orange);
}

.cta-button.primary:hover {
    background: var(--pale-orange);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.cta-button.secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.cta-button.secondary:hover {
    background: var(--white);
    color: var(--primary-orange);
}

.cta-button.large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.telegram-icon {
    width: 20px;
    height: 20px;
}

.cta-button.large .telegram-icon {
    width: 24px;
    height: 24px;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    transform: translateX(calc(33.33% / 2));
}

.translation-demo {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.demo-message {
    background: var(--white);
    color: var(--dark-text);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    text-align: center;
}

.message-text {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.message-lang {
    font-size: var(--font-size-sm);
    color: var(--primary-orange);
    font-weight: 600;
}

.demo-arrow {
    color: var(--white);
    animation: bounce 2s infinite;
}

.demo-arrow svg {
    width: 30px;
    height: 30px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
    margin-top: 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--dark-text);
    opacity: 0.7;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: 0 4px 20px var(--shadow);
    transition: var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: var(--transition-normal);
}

.feature-card[data-feature="text"]::before {
    background: var(--primary-orange);
}

.feature-card[data-feature="image"]::before {
    background: var(--vibrant-blue);
}

.feature-card[data-feature="audio"]::before {
    background: var(--fresh-green);
}

.feature-card[data-feature="forward"]::before {
    background: var(--purple-accent);
}

.feature-card[data-feature="inline"]::before {
    background: #FF6B35;
}

.feature-card[data-feature="documents"]::before {
    background: #2196F3;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.feature-card:hover::before {
    height: 100%;
    opacity: 0.05;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.feature-card[data-feature="text"] .feature-icon {
    background: rgba(228, 87, 27, 0.1);
    color: var(--primary-orange);
}

.feature-card[data-feature="image"] .feature-icon {
    background: rgba(27, 113, 228, 0.1);
    color: var(--vibrant-blue);
}

.feature-card[data-feature="audio"] .feature-icon {
    background: rgba(76, 175, 80, 0.1);
    color: var(--fresh-green);
}

.feature-card[data-feature="forward"] .feature-icon {
    background: rgba(156, 39, 176, 0.1);
    color: var(--purple-accent);
}

.feature-card[data-feature="inline"] .feature-icon {
    background: rgba(255, 107, 53, 0.1);
    color: #FF6B35;
}

.feature-card[data-feature="documents"] .feature-icon {
    background: rgba(33, 150, 243, 0.1);
    color: #2196F3;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--dark-text);
}

.feature-description {
    color: var(--dark-text);
    opacity: 0.7;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-orange), var(--light-orange));
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 8px 25px rgba(228, 87, 27, 0.3);
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--dark-text);
}

.step-description {
    color: var(--dark-text);
    opacity: 0.7;
    line-height: 1.6;
    max-width: 280px;
    margin: 0 auto;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--vibrant-blue) 0%, var(--purple-accent) 50%, var(--primary-orange) 100%);
    padding: var(--spacing-3xl) 0;
    color: var(--white);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.cta-section .cta-button.primary {
    background: var(--primary-orange);
    color: var(--white);
}

.cta-section .cta-button.primary:hover {
    background: var(--light-orange);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

/* Footer */
.footer {
    background: var(--dark-text);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-brand-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
}

.footer-brand-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-orange);
}

.footer-tagline {
    opacity: 0.7;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary-orange);
}

.footer-link {
    display: block;
    color: var(--white);
    text-decoration: none;
    opacity: 0.7;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

.footer-link:hover {
    opacity: 1;
    color: var(--primary-orange);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    opacity: 0.7;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-orange);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-visual {
        justify-content: center;
        transform: none;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .steps-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex !important;
    }
    
    .hero {
        padding: 100px 0 var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .cta-title {
        font-size: var(--font-size-3xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .translation-demo {
        padding: var(--spacing-lg);
    }
    
    .demo-message {
        min-width: 150px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .cta-title {
        font-size: var(--font-size-2xl);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus Styles for Accessibility */
.cta-button:focus,
.nav-link:focus,
.footer-link:focus {
    outline: 2px solid var(--primary-orange);
    outline-offset: 2px;
}

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

.feature-card,
.step {
    animation: fadeInUp 0.6s ease-out;
}

.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; }

.step:nth-child(1) { animation-delay: 0.1s; }
.step:nth-child(2) { animation-delay: 0.3s; }
.step:nth-child(3) { animation-delay: 0.5s; }