:root {
    --bg-color: #080808;
    --surface-color: #121212;
    --text-main: #e0e0e0;
    --text-muted: #888888;
    --accent: #00ffcc;
    --accent-hover: #00ccaa;
    --danger: #ff3366;
    --border-color: #2a2a2a;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Montserrat', 'Helvetica Neue', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); line-height: 1.6; display: flex; flex-direction: column; min-height: 100vh; }
header { background: rgba(18, 18, 18, 0.95); backdrop-filter: blur(10px); padding: 15px 20px; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.logo { font-size: 28px; font-weight: 900; color: #fff; text-decoration: none; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 2px;}
.logo span { color: var(--accent); text-shadow: 0 0 10px rgba(0,255,204,0.5); }
nav { display: flex; gap: 25px; flex-wrap: wrap; }
nav a { color: var(--text-main); text-decoration: none; font-size: 15px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; transition: 0.3s; padding: 5px 0; border-bottom: 2px solid transparent; }
nav a:hover, nav a.active { color: var(--accent); border-bottom: 2px solid var(--accent); text-shadow: 0 0 8px rgba(0,255,204,0.4); }

.main-container { max-width: 1200px; margin: 40px auto; padding: 0 20px; flex-grow: 1; width: 100%; }

/* Sections */
.section { margin-bottom: 90px; }
.section-title { font-size: 36px; margin-bottom: 40px; text-align: center; color: #fff; text-transform: uppercase; font-weight: 800; letter-spacing: 2px; }
.section-title::after { content: ''; display: block; width: 60px; height: 4px; background: var(--accent); margin: 15px auto 0; box-shadow: 0 0 10px var(--accent); }

/* Hero */
.hero { background: linear-gradient(135deg, rgba(8,8,8,0.9) 0%, rgba(18,18,18,0.8) 100%), url('../img/hero-dark.jpg') center/cover; padding: 120px 20px; text-align: center; border-radius: 20px; margin-bottom: 60px; border: 1px solid var(--border-color); box-shadow: 0 15px 40px rgba(0,0,0,0.5); }
.hero h1 { font-size: 52px; margin-bottom: 25px; color: #fff; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; }
.hero p { font-size: 20px; color: var(--text-muted); margin-bottom: 40px; max-width: 800px; margin-left: auto; margin-right: auto; }

/* Buttons */
.btn { display: inline-block; background: var(--accent); color: #000; padding: 18px 36px; border-radius: 8px; text-decoration: none; font-weight: 800; font-size: 16px; text-transform: uppercase; letter-spacing: 1px; transition: all 0.3s ease; text-align: center; border: none; cursor: pointer; box-shadow: 0 0 20px rgba(0, 255, 204, 0.4); }
.btn:hover { background: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 0 30px rgba(0, 255, 204, 0.7); }

/* Features Grid */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 30px; }
.feature-card { background: var(--surface-color); padding: 40px 30px; border-radius: 16px; text-align: center; border: 1px solid var(--border-color); transition: 0.3s; }
.feature-card:hover { transform: translateY(-10px); border-color: var(--accent); box-shadow: 0 10px 25px rgba(0,255,204,0.1); }
.feature-icon { font-size: 50px; margin-bottom: 20px; filter: drop-shadow(0 0 10px rgba(0,255,204,0.3)); }
.feature-card h3 { color: #fff; font-size: 22px; margin-bottom: 15px; font-weight: 700; }

/* Catalog Grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 30px; }
.card { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 16px; padding: 30px; display: flex; flex-direction: column; transition: 0.3s; text-align: center; }
.card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 15px rgba(0,255,204,0.1); }
.card-img { width: 100%; height: 260px; object-fit: contain; border-radius: 12px; margin-bottom: 20px; background: #000; display: block; padding: 15px; border: 1px solid #222;}
.card-placeholder { width: 100%; height: 260px; background: #0a0a0a; border-radius: 12px; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 14px; padding: 10px; border: 1px dashed var(--border-color);}
.card h3 { margin-bottom: 15px; font-size: 24px; flex-grow: 1; color: #fff; font-weight: 700; }
.price { font-size: 28px; color: var(--accent); font-weight: 900; margin-bottom: 25px; text-shadow: 0 0 10px rgba(0,255,204,0.3); }

/* Steps */
.steps-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 30px; }
.step { flex: 1; min-width: 220px; text-align: center; padding: 20px; }
.step span { display: inline-flex; width: 80px; height: 80px; background: rgba(0, 255, 204, 0.05); color: var(--accent); border: 2px solid var(--accent); border-radius: 50%; font-size: 32px; font-weight: 900; align-items: center; justify-content: center; margin-bottom: 25px; box-shadow: 0 0 20px rgba(0,255,204,0.2); }
.step h3 { color: #fff; font-size: 22px; margin-bottom: 15px; font-weight: 700; }

/* Exchange Block */
.exchange-block { background: linear-gradient(135deg, var(--surface-color) 0%, #0a0a0a 100%); padding: 60px 40px; border-radius: 20px; border: 1px solid var(--border-color); text-align: center; box-shadow: 0 20px 40px rgba(0,0,0,0.4), inset 0 0 0 1px rgba(0,255,204,0.1); }
.exchange-block p { font-size: 20px; color: var(--text-muted); max-width: 800px; margin: 0 auto 40px; }

/* SEO & Content */
.seo-text-block { background: var(--surface-color); padding: 50px; border-radius: 16px; border: 1px solid var(--border-color); margin-top: 60px; }
.seo-text-block h2 { color: #fff; margin-bottom: 25px; font-size: 32px; font-weight: 800; }
.seo-text-block h3 { color: #fff; margin-top: 35px; margin-bottom: 15px; font-size: 24px; font-weight: 700; color: var(--accent); }
.seo-text-block p { margin-bottom: 15px; text-align: justify; color: var(--text-muted); font-size: 16px; line-height: 1.8; }

/* Products */
.product-detail { display: flex; gap: 50px; flex-wrap: wrap; margin-bottom: 50px; }
.product-gallery { flex: 1; min-width: 300px; background: #000; min-height: 450px; border-radius: 16px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--border-color); color: var(--text-muted); text-align:center; padding:30px; flex-direction:column; overflow: hidden; }
.product-gallery img { max-width: 100%; max-height: 100%; object-fit: contain; }
.product-info { flex: 1; min-width: 300px; }
.product-info h1 { font-size: 42px; margin-bottom: 20px; color: #fff; font-weight: 900; text-transform: uppercase; }
.product-info .desc { color: var(--text-muted); font-size: 18px; margin-bottom: 30px; line-height: 1.7; text-align: justify; }
.buy-options { background: var(--surface-color); padding: 30px; border-radius: 16px; border: 1px solid var(--border-color); margin-bottom: 30px; }
.buy-options label { display: block; margin-bottom: 18px; font-size: 18px; cursor: pointer; color: var(--text-main); font-weight: 600; }
.buy-options input { margin-right: 12px; transform: scale(1.3); cursor: pointer; accent-color: var(--accent); }

/* Footer */
footer { background: #050505; padding: 60px 20px 40px; margin-top: auto; border-top: 1px solid var(--border-color); }
.footer-content { max-width: 1200px; margin: 0 auto; text-align: center; }
.disclaimer { background: rgba(255, 51, 102, 0.05); border: 1px solid rgba(255, 51, 102, 0.3); color: var(--danger); padding: 25px; border-radius: 12px; margin-bottom: 40px; font-weight: 500; font-size: 15px; text-align: left; line-height: 1.6; }

/* Floating */
.floating-contacts { position: fixed; bottom: 40px; right: 40px; display: flex; flex-direction: column; gap: 15px; z-index: 1000; }
.float-btn { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--surface-color); border: 2px solid var(--accent); color: var(--accent); text-decoration: none; font-size: 28px; box-shadow: 0 0 15px rgba(0,255,204,0.2); transition: 0.3s; }
.float-btn:hover { background: var(--accent); color: #000; transform: scale(1.1); box-shadow: 0 0 25px rgba(0,255,204,0.6); }

/* Breadcrumbs & Articles */
.breadcrumb { margin-bottom: 25px; font-size: 15px; display:inline-block; }
.breadcrumb a { color: var(--accent); text-decoration: none; font-weight: 600; }
.breadcrumb span { color: var(--text-muted); margin: 0 12px; }
.article-content { font-size: 18px; line-height: 1.8; color: var(--text-main); text-align: justify; margin-bottom: 50px; background: var(--surface-color); padding: 50px; border-radius: 16px; border: 1px solid var(--border-color); }
.article-content h1 { color: #fff; margin-bottom: 30px; font-size: 40px; line-height: 1.3; font-weight: 800; }
.article-list { list-style: none; }
.article-list li { margin-bottom: 25px; background: var(--surface-color); padding: 30px; border-radius: 16px; border: 1px solid var(--border-color); transition: 0.3s; }
.article-list li:hover { transform: translateX(10px); border-color: var(--accent); box-shadow: -5px 0 15px rgba(0,255,204,0.1); }
.article-list a { font-size: 24px; color: var(--accent); text-decoration: none; font-weight: 800; display: block; margin-bottom: 12px; }
.article-list a:hover { text-shadow: 0 0 8px rgba(0,255,204,0.4); }

@media (max-width: 768px) { 
    .hero h1 { font-size: 36px; } 
    .nav-container { flex-direction: column; align-items: center; } 
    nav { justify-content: center; gap: 15px; }
    .product-detail { flex-direction: column; }
    .seo-text-block, .article-content { padding: 30px 20px; }
    .exchange-block { padding: 40px 20px; }
}