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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #0ea5e9;
    --accent: #3b82f6;
    --dark: #0b0f19;
    --dark-light: #1e293b;
    --gray: #94a3b8;
    --gray-light: #64748b;
    --light: #111827;
    --white: #ffffff;
    --text-primary: #e2e8f0;
    --text-body: #cbd5e1;
    --card-bg: #131c2e;
    --border-color: #1e293b;
    --gradient-1: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
    --gradient-2: linear-gradient(135deg, #0ea5e9 0%, #3b82f6 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-body);
    background: var(--dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Language Navigation */
.language-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    transition: all 0.3s ease;
}

.language-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

.language-selector {
    display: flex;
    gap: 8px;
    background: var(--card-bg);
    padding: 4px;
    border-radius: 10px;
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--gray);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    color: var(--text-primary);
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #050811 0%, #0b1628 40%, #0a1a2e 70%, #050811 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 60% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 40%);
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(25%, 25%) scale(1.1); }
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-2);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.05);
}

.btn-large {
    padding: 20px 40px;
    font-size: 1.125rem;
}

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

.arrow {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.mouse {
    width: 28px;
    height: 44px;
    border: 2px solid var(--gray);
    border-radius: 14px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--gray);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-title.center {
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

/* About Section */
.about {
    background: var(--light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 1.125rem;
    color: var(--text-body);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
    font-weight: 500;
}

/* Features Section */
.features {
    background: var(--dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-text {
    color: var(--gray);
    line-height: 1.7;
}

/* Screenshots Section */
.screenshots {
    background: var(--light);
}

.screenshots .section-title {
    color: var(--text-primary);
}

.screenshots .section-subtitle {
    color: var(--gray);
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.screenshot-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16/10;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.screenshot-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.screenshot-card:hover img {
    transform: scale(1.05);
}

.screenshot-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 15, 25, 0.9) 0%, transparent 50%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}

.screenshot-overlay span {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--white);
}

/* Tech Section */
.tech {
    background: var(--dark);
}

.tech-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 30px 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

.tech-icon {
    font-size: 2.5rem;
}

/* CTA Section */
.cta {
    background: var(--gradient-1);
    text-align: center;
    padding: 120px 0;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.cta-text {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto 40px;
}

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

.cta .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
}

.cta .github-icon {
    color: var(--primary);
}

/* Footer */
.footer {
    background: #060a13;
    border-top: 1px solid var(--border-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    text-align: center;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-text {
    color: var(--gray);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    color: var(--gray-light);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .language-nav .container {
        flex-direction: column;
        gap: 16px;
    }
    
    .hero {
        padding-top: 160px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .screenshot-gallery {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        gap: 16px;
    }
    
    .tech-item {
        padding: 20px 30px;
    }
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease;
}

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

.lightbox.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
    z-index: 10000;
}

.lightbox-close:hover {
    color: var(--primary-light);
    transform: scale(1.1);
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

#lightbox-caption {
    color: #fff;
    font-size: 1.125rem;
    font-weight: 500;
    margin-top: 20px;
    text-align: center;
    padding: 0 20px;
}

.screenshot-card {
    cursor: pointer;
}