:root {
    --dark-bg: #0D0B14;
    --darker-bg: #080610;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --glass-bg: rgba(15, 23, 42, 0.4);
    --glass-border: rgba(148, 163, 184, 0.1);
    --accent-blue: #3B82F6;
    --accent-purple: #8B5CF6;
    --accent-pink: #EC4899;
    --success: #10B981;
    --glow-primary: hsl(220, 91%, 60%);
    --glow-secondary: hsl(270, 88%, 65%);
    --border-radius: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-feature-settings: 'cv11', 'ss01';
    font-variation-settings: 'opsz' 32;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
body.nav-open {
    overflow: hidden;
}
.aurora-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}
.aurora-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle at center, var(--glow-primary) 0%, transparent 70%);
    filter: blur(100px);
    opacity: 0.3;
    will-change: transform;
}
.aurora-glow:nth-child(2) {
    background: radial-gradient(circle at center, var(--glow-secondary) 0%, transparent 70%);
    width: 500px;
    height: 500px;
    opacity: 0.25;
}
.aurora-glow:nth-child(3) {
    background: radial-gradient(circle at center, var(--accent-pink) 0%, transparent 60%);
    width: 400px;
    height: 400px;
    opacity: 0.2;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; position: relative; }
.section-hero { min-height: 100vh; display: flex; align-items: center; padding: 8rem 0 6rem; }
h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; letter-spacing: -0.025em; }
h1 {
    font-size: clamp(2.25rem, 6vw, 4rem);
    background: linear-gradient(135deg, var(--glow-primary), var(--glow-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 1.5rem;
}
h2 { font-size: clamp(1.8rem, 5vw, 3rem); text-align: center; margin-bottom: 3rem; }
h3 { font-size: 1.25rem; margin-bottom: 1rem; }
p { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.7; }
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 11, 20, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.3s ease;
}
.nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; max-width: 1200px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 0.75rem; font-weight: 700; font-size: 1.25rem; text-decoration: none; color: var(--text-primary); transition: opacity 0.3s ease; }
.logo:hover { opacity: 0.8; }
.logo-img { width: 40px; height: 40px; border-radius: 8px; }
.nav-right { display: flex; align-items: center; gap: 2rem; }
.social-links { display: flex; gap: 1rem; }
.social-link { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-muted); text-decoration: none; transition: all 0.3s ease; }
.social-link:hover { color: var(--text-primary); background: rgba(59, 130, 246, 0.1); border-color: rgba(59, 130, 246, 0.3); transform: translateY(-2px); }
.lang-switcher { display: flex; gap: 0.5rem; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 12px; padding: 0.5rem; }
.lang-btn { padding: 0.5rem 1rem; border: none; background: transparent; color: var(--text-muted); font-weight: 600; border-radius: 8px; cursor: pointer; transition: all 0.3s ease; text-decoration: none; }
.lang-btn.active, .lang-btn:hover { color: var(--text-primary); background: rgba(59, 130, 246, 0.1); }
.mobile-nav-toggle { display: none; }
.mobile-nav { display: none; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.75rem; padding: 1rem 2rem; border-radius: var(--border-radius); font-weight: 600; text-decoration: none; border: none; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); font-size: 1rem; line-height: 1; }
.btn-primary { background: linear-gradient(135deg, var(--glow-primary), var(--glow-secondary)); color: white; box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); animation: pulse-glow 3s infinite; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3); animation: none; }
@keyframes pulse-glow { 0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); } 70% { box-shadow: 0 0 0 15px rgba(59, 130, 246, 0); } 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); } }
.card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--border-radius); padding: 2rem; backdrop-filter: blur(10px); transition: all 0.3s ease; height: 100%; }
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); border-color: rgba(148, 163, 184, 0.2); }
.card-icon { font-size: 2.5rem; margin-bottom: 1.5rem; display: block; }
.card-title { color: var(--text-primary); margin-bottom: 1rem; }
.grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }
.hero-subtitle { font-size: 1.125rem; margin-bottom: 2.5rem; max-width: 600px; margin-left: auto; margin-right: auto; }
.problem-icon { width: 60px; height: 60px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1.5rem; }
.problem-icon-monopoly { background: linear-gradient(135deg, #FEF3C7, #F59E0B); color: #92400E; }
.problem-icon-waste { background: linear-gradient(135deg, #DBEAFE, #3B82F6); color: #1E40AF; }
.problem-icon-fragmented { background: linear-gradient(135deg, #F3E8FF, #8B5CF6); color: #6B21A8; }
.solution-content { text-align: center; max-width: 800px; margin: 0 auto; }
.solution-highlight { color: var(--text-primary); font-weight: 700; }
.how-card { text-align: center; position: relative; }
.how-number { position: absolute; top: -10px; right: -10px; width: 30px; height: 30px; background: linear-gradient(135deg, var(--glow-primary), var(--glow-secondary)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.875rem; color: white; }
.vision-features { list-style: none; margin: 2rem 0; max-width: 600px; margin-left: auto; margin-right: auto; }
.vision-feature { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 12px; padding: 1.5rem; margin-bottom: 1rem; border-left: 4px solid var(--glow-secondary); transition: all 0.3s ease; }
.vision-feature:hover { background: rgba(15, 23, 42, 0.6); transform: translateX(4px); }
.social-buttons { display: flex; flex-direction: column; gap: 1rem; align-items: center; margin-top: 2rem; }
.social-btn { display: flex; align-items: center; justify-content: center; gap: 0.75rem; padding: 1rem 1.5rem; border-radius: 12px; text-decoration: none; font-weight: 600; width: 100%; max-width: 280px; transition: all 0.3s ease; }
.social-btn-github { background: #1F2937; color: white; border: 1px solid #374151; }
.social-btn-github:hover { background: #111827; transform: translateY(-2px); }
.social-btn-twitter { background: #000; color: white; border: 1px solid #333; }
.social-btn-twitter:hover { background: #1a1a1a; transform: translateY(-2px); }
.footer { text-align: center; padding: 3rem 0; border-top: 1px solid var(--glass-border); color: var(--text-muted); margin-top: 4rem; }
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1); }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.hidden { display: none; }

@media (max-width: 768px) {
    .section { padding: 4rem 0; }
    .section-hero { padding: 7rem 0 4rem; min-height: 90vh; }
    .nav { padding: 1rem; }
    .nav-right { display: none; }
    .hero-subtitle { font-size: 1.05rem; }
    h3 { font-size: 1.15rem; }
    p { font-size: 1rem; }
    .card { padding: 1.5rem; }
    .social-buttons { flex-direction: column; }
    .social-btn { max-width: 100%; }

    .mobile-nav-toggle {
        display: block;
        z-index: 1001;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0.5rem;
    }
    .hamburger {
        display: block;
        position: relative;
        width: 24px;
        height: 2px;
        background: var(--text-primary);
        transition: all 0.3s ease;
    }
    .hamburger::before, .hamburger::after {
        content: '';
        position: absolute;
        left: 0;
        width: 100%;
        height: 2px;
        background: var(--text-primary);
        transition: all 0.3s ease;
    }
    .hamburger::before { top: -8px; }
    .hamburger::after { bottom: -8px; }
    .nav-open .hamburger {
        background: transparent;
    }
    .nav-open .hamburger::before {
        transform: translateY(8px) rotate(45deg);
    }
    .nav-open .hamburger::after {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .mobile-nav {
        display: block;
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100%;
        background: rgba(13, 11, 20, 0.9);
        backdrop-filter: blur(20px);
        z-index: 999;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .nav-open .mobile-nav {
        transform: translateX(0);
    }
    .mobile-nav-content {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
        height: 70%;
        padding: 2rem 0;
    }
    .mobile-lang-switcher {
        display: flex;
        gap: 0.5rem;
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
        padding: 0.5rem;
    }
    .mobile-nav-links {
        list-style: none;
        padding: 0;
        text-align: center;
    }
    .mobile-nav-links li {
        margin: 1.5rem 0;
    }
    .mobile-nav-links a {
        color: var(--text-primary);
        text-decoration: none;
        font-size: 1.5rem;
        font-weight: 700;
        padding: 0.5rem 1rem;
        transition: color 0.3s ease;
    }
    .mobile-nav-links a:hover {
        color: var(--glow-primary);
    }
    .mobile-social-links {
        display: flex;
        gap: 1.5rem;
    }
    .mobile-social-links .social-link {
        width: 50px;
        height: 50px;
    }
    .mobile-social-links .social-link svg {
        width: 24px; height: 24px;
    }
}
@media (min-width: 769px) {
    .grid { gap: 2rem; }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .social-buttons { flex-direction: row; justify-content: center; }
}
@media (min-width: 1024px) {
    .container { padding: 0 2rem; }
}
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
    .aurora-glow { transition: none !important; }
}
@media (prefers-contrast: high) {
    :root { --glass-bg: rgba(0, 0, 0, 0.8); --glass-border: rgba(255, 255, 255, 0.3); }
}