:root {
    --black: #121212;
    --black-soft: #1a1a1a;
    --white: #FFFFFF;
    --accent: #00FF85;
    --accent-glow: rgba(0, 255, 133, 0.2);
    --gray-dark: #2a2a2a;
    --text-light: #e0e0e0;
    --border-radius-card: 24px;
    --shadow-neon: 0 0 12px rgba(0, 255, 133, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--black);
    color: var(--white);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, .logo, .nav-links a {
    font-family: 'Space Grotesk', monospace;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: 2.8rem;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(135deg, #FFFFFF 30%, var(--accent) 80%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 255, 133, 0.2);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    text-decoration: none;
    color: var(--white);
}
.logo span {
    color: var(--accent);
    text-shadow: 0 0 6px var(--accent);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: all 0.2s;
    padding-bottom: 4px;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}
.menu-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-family: 'Inter', sans-serif;
}
.btn-primary {
    background: var(--accent);
    color: var(--black);
    box-shadow: 0 2px 8px rgba(0,255,133,0.3);
}
.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    box-shadow: 0 0 12px var(--accent);
    border: 1px solid var(--accent);
    padding: 11px 27px;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}
.btn-outline:hover {
    background: var(--accent);
    color: var(--black);
}

/* Hero */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 80% 30%, #0c2b1a, var(--black) 70%);
}
.hero-content h1 {
    font-size: 4rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}
.accent-text {
    color: var(--accent);
    text-shadow: 0 0 12px var(--accent);
}
.hero-sub {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 2rem;
    color: #ccc;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Features */
.features {
    padding: 80px 0;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}
.feature-card {
    background: var(--black-soft);
    padding: 2rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid rgba(0,255,133,0.1);
    transition: 0.2s;
}
.feature-card i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}
.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

/* Catalog */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}
.product-card {
    background: var(--black-soft);
    border-radius: var(--border-radius-card);
    border: 1px solid rgba(0, 255, 133, 0.15);
    transition: 0.2s;
    overflow: hidden;
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-neon);
}
.product-img {
    height: 260px;
    background: #1e1e1e;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--accent);
}
.product-info {
    padding: 1.5rem;
}
.product-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    margin: 1rem 0;
}
.btn-buy {
    background: var(--accent);
    color: var(--black);
    padding: 8px 16px;
    border-radius: 40px;
    margin-right: 8px;
    font-size: 0.8rem;
    font-weight: 600;
}
.btn-ozon {
    background: #005bff;
    color: white;
}
.product-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

/* Pixel Converter */
.pixel-converter {
    background: var(--black-soft);
    border-radius: 32px;
    padding: 2rem;
    border: 1px solid rgba(0,255,133,0.2);
}
.upload-area {
    border: 2px dashed var(--accent);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    margin-bottom: 2rem;
}
.upload-area i {
    font-size: 3rem;
    color: var(--accent);
}
.pixel-controls {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}
.pixel-controls label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
input[type="range"] {
    background: var(--gray-dark);
    height: 4px;
    border-radius: 4px;
}
#pixel-canvas {
    max-width: 100%;
    border-radius: 16px;
    background: #1a1a1a;
    margin-top: 1rem;
}
.pixel-result {
    text-align: center;
}

/* Instruction box */
.instruction-box {
    max-width: 700px;
    margin: 0 auto;
    background: var(--black-soft);
    padding: 2.5rem;
    border-radius: 32px;
    text-align: center;
    border: 1px solid rgba(0,255,133,0.2);
}
.code-input {
    flex: 1;
    padding: 14px 20px;
    border-radius: 60px;
    border: none;
    background: #2a2a2a;
    color: white;
    font-size: 1rem;
}
.code-input-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 1.5rem 0;
}
.instruction-result {
    background: rgba(0,0,0,0.4);
    padding: 1.5rem;
    border-radius: 24px;
    min-height: 120px;
}

/* Contacts */
.contacts-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    justify-content: center;
    background: var(--black-soft);
    padding: 2.5rem;
    border-radius: 32px;
}
.contact-info p {
    margin: 1rem 0;
    font-size: 1.2rem;
}
.contact-info i {
    width: 32px;
    color: var(--accent);
}
.market-btn {
    display: block;
    margin: 12px 0;
    width: 200px;
}

/* Footer */
footer {
    background: #0a0a0a;
    margin-top: 60px;
    padding: 50px 0 20px;
    border-top: 1px solid rgba(0,255,133,0.1);
}
.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
}
.footer-col p {
    opacity: 0.7;
    margin: 12px 0;
}
.copyright {
    text-align: center;
    padding-top: 30px;
    opacity: 0.5;
}

/* Page visibility */
.page-section {
    display: none;
    padding: 60px 0;
}
.page-section.active-page {
    display: block;
}
.hidden-page {
    display: none;
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: #121212;
        position: absolute;
        top: 70px;
        right: 0;
        width: 200px;
        padding: 1rem;
        border-radius: 16px;
        border: 1px solid var(--accent);
    }
    .nav-links.show {
        display: flex;
    }
    .menu-toggle {
        display: block;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .footer-container {
        grid-template-columns: 1fr;
    }
}