/* RU: простой современный дизайн без фреймворков */
:root {
    --bg: #0b1020;
    --card: rgba(255,255,255,0.06);
    --text: rgba(255,255,255,0.92);
    --muted: rgba(255,255,255,0.72);
    --line: rgba(255,255,255,0.14);
    --radius: 18px;
    --max: 1100px;
}

* { box-sizing: border-box; }
html, body { margin:0; padding:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }

.bg-glow {
    position: fixed; inset: -20%;
    background:
            radial-gradient(circle at 20% 20%, rgba(99,102,241,0.35), transparent 40%),
            radial-gradient(circle at 80% 10%, rgba(16,185,129,0.25), transparent 40%),
            radial-gradient(circle at 70% 80%, rgba(236,72,153,0.22), transparent 45%);
    filter: blur(40px);
    z-index: -1;
}

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

.nav {
    display:flex; align-items:center; justify-content:space-between;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(0,0,0,0.25);
    backdrop-filter: blur(10px);
}
.brand { font-weight: 700; letter-spacing: 0.2px; }
.nav-links { display:flex; gap: 16px; align-items:center; flex-wrap: wrap; }
.nav-links a { padding: 8px 10px; border-radius: 10px; color: var(--muted); }
.nav-links a:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.lang {
    display:flex; gap: 8px; align-items:center;
    border-left: 1px solid var(--line);
    padding-left: 12px;
}
.lang button {
    cursor:pointer;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.04);
    color: var(--muted);
    border-radius: 10px;
    padding: 8px 10px;
}
.lang button.active { color: var(--text); background: rgba(255,255,255,0.10); }

.hero {
    margin-top: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.05);
    padding: 34px 22px;
}
.hero h1 { margin: 0 0 10px 0; font-size: clamp(26px, 4vw, 44px); line-height: 1.05; }
.hero p { margin: 0 0 18px 0; color: var(--muted); font-size: 16px; max-width: 70ch; }
.cta {
    display:inline-block;
    padding: 11px 14px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.10);
}

.grid {
    margin-top: 18px;
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--card);
    padding: 16px;
}
.card h3 { margin: 0 0 6px 0; }
.card p { margin: 0; color: var(--muted); }

.section-title { margin: 24px 0 10px 0; color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; }

.activity ul { margin: 10px 0 0 0; padding-left: 18px; color: var(--muted); }
.footer {
    margin-top: 24px;
    padding: 18px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    display:flex; justify-content:space-between; flex-wrap: wrap; gap: 12px;
}

.page {
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.05);
    padding: 20px 18px;
}
.page h1 { margin: 0 0 10px 0; }
.page p { margin: 0; color: var(--muted); white-space: pre-wrap; }

@media (max-width: 900px) {
    .grid { grid-template-columns: 1fr; }
    .lang { border-left: none; padding-left: 0; }
}