:root {
    --primary: #0f1115;
    --accent: #ff4d4d;
    --text: #ffffff;
    --gray: #c0c0c0;
    --film-grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.07'/%3E%3C/svg%3E");
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--primary);
    color: var(--text);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Навигация */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nav-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    list-style: none;
}
.nav-link {
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    position: relative;
    transition: color 0.3s ease;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}
.nav-link:hover, .nav-link.active {
    color: var(--accent);
}
.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Общие стили */
section { padding: 80px 0; }
h1, h2, h3 { margin-bottom: 20px; line-height: 1.1; }
h1 { font-size: 48px; text-transform: uppercase; letter-spacing: 2px; }
h2 { font-size: 36px; border-left: 4px solid var(--accent); padding-left: 20px; }
p { max-width: 700px; line-height: 1.6; color: var(--gray); margin-bottom: 20px; }

/* Главная */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, rgba(15,17,21,0.8), rgba(0,0,0,1)), var(--film-grain);
    position: relative;
}
.hero h1 span { color: var(--accent); }

/* О нас */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-img {
    background: #1a1d23;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    border: 1px solid rgba(255,255,255,0.1);
}

/* Приказ № 511: реквизиты и цены */
dl { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
dt { font-weight: 600; color: var(--accent); }
dd { color: var(--gray); }
.price-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}
.price-table th, .price-table td {
    border: 1px solid rgba(255,255,255,0.1);
    padding: 1rem;
    text-align: left;
}
.price-table th {
    background: rgba(255,255,255,0.05);
    color: var(--text);
}
.confidential-note {
    color: #888;
    font-style: italic;
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Услуги */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.service-card {
    background: rgba(255,255,255,0.03);
    padding: 40px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.4s ease, border-color 0.4s;
}
.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
}
.service-icon { font-size: 40px; margin-bottom: 20px; display: block; }

/* Сертификаты */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.cert-item {
    aspect-ratio: 4/3;
    background: #222;
    border: 1px solid #444;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}
.cert-item::before {
    content: 'Сертификат №';
    position: absolute;
    bottom: 20px;
    left: 20px;
    font-size: 12px;
    color: var(--gray);
}
.cert-item:hover { border-color: var(--accent); }

footer {
    padding: 60px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--gray);
    font-size: 14px;
}

@media (max-width: 768px) {
    .nav-links { flex-direction: column; gap: 20px; }
    .about-grid { grid-template-columns: 1fr; }
    h1 { font-size: 32px; }
    dl { grid-template-columns: 1fr; gap: 0.5rem; }
    dt, dd { grid-column: span 1; }
}