:root {
    --bg-base: #08080a;
    --bg-surface: #111113;
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a142e 0%, #08080a 60%);
    --text-main: #ffffff;
    --text-muted: #888888;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --font-main: 'Inter', sans-serif;
    --container-width: 1200px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-base);
}

body {
    background: var(--bg-base);
    background-image: var(--bg-gradient);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a, button {
    outline: none;
    border: none;
    background: none;
    cursor: pointer;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

section {
    padding: 140px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-title {
    display: block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-heading {
    font-size: 44px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.2;
    color: var(--text-main);
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(8, 8, 10, 0);
    border-bottom: 1px solid transparent;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

nav.scrolled {
    background: rgba(8, 8, 10, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 10px 0;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: padding 0.4s ease;
}

nav.scrolled .nav-container {
    padding: 12px 24px;
}

.logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 6px;
    color: var(--text-main);
    text-decoration: none;
    text-transform: uppercase;
    z-index: 1001;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: color 0.3s ease;
    text-transform: uppercase;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-main);
}

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

.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--text-main);
    transition: all 0.3s ease;
}

.hero {
    padding-top: 220px;
    padding-bottom: 140px;
    text-align: center;
    min-height: 100vh;
}

.hero h1 {
    font-size: clamp(48px, 8vw, 84px);
    font-weight: 800;
    letter-spacing: -2.5px;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #ffffff 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-muted);
    font-size: clamp(16px, 2vw, 20px);
    max-width: 650px;
    margin: 0 auto 48px auto;
    font-weight: 300;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent);
    color: #ffffff;
    padding: 16px 40px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    font-size: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 1px solid var(--accent);
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--accent);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 16px;
    font-weight: 300;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 48px 32px;
    transition: all 0.4s ease;
    text-align: left;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-5px);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-main);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 300;
}

.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 64px;
    max-width: 840px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.8;
}

.product-badge {
    display: inline-block;
    font-size: 12px;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: rgba(99, 102, 241, 0.1);
    padding: 6px 12px;
    border-radius: 4px;
    align-self: flex-start;
}

.product-card h3 {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: 1px;
}

.product-card p {
    color: var(--text-muted);
    font-size: 18px;
    font-weight: 300;
    max-width: 600px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 16px 40px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    font-size: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
    align-self: flex-start;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-download:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
}

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

.contact-section > .container > p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 40px;
    font-weight: 300;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 60px;
}

.social-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

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

footer {
    border-top: 1px solid var(--border-subtle);
    padding: 40px 0;
    text-align: center;
}

footer p {
    color: #555555;
    font-size: 13px;
    letter-spacing: 1px;
    font-weight: 400;
}

@media (max-width: 992px) {
    .hero h1 { font-size: 56px; }
    .product-card { padding: 48px; }
    .section-heading { font-size: 36px; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-base);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 1000;
    }
    
    .nav-links.active { right: 0; }
    
    .hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .hero { padding-top: 160px; min-height: auto; }
    .hero h1 { font-size: 40px; letter-spacing: -1px; }
    .hero p { font-size: 16px; }
    
    section { padding: 80px 0; }
    .section-heading { font-size: 32px; margin-bottom: 40px; }
    
    .features-grid { grid-template-columns: 1fr; }
    
    .product-card { padding: 32px 24px; }
    .product-card h3 { font-size: 32px; }
    .product-card p { font-size: 16px; }
    
    .btn-primary, .btn-download { width: 100%; text-align: center; }
    
    .social-links { flex-direction: column; gap: 16px; }
    
    footer { padding: 30px 0; }
}
.fade-in {
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}
.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }