:root {
    --primary: #2563eb;
    --dark: #1e293b;
    --light: #f8fafc;
    --text: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background-color: #fff;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
}

.nav a {
    color: var(--dark);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

.nav a:hover {
    color: var(--primary);
}

.hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
}

.services, .about, .contacts {
    padding: 80px 0;
}

.services {
    background: var(--light);
}

h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--dark);
}

.about {
    text-align: center;
}

.about p {
    max-width: 800px;
    margin: 0 auto;
    font-size: 18px;
}

.contacts {
    background: var(--dark);
    color: #fff;
    text-align: center;
}

.contacts h2 {
    color: #fff;
}

.contacts p {
    margin-bottom: 15px;
}

.footer {
    background: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    border-top: 1px solid #1e293b;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .header .container { flex-direction: column; height: auto; padding: 15px; }
    .nav { margin-top: 10px; }
}