:root {
    --bg: #0b0b0d;
    --bg-2: #111216;
    --surface: #15171c;
    --surface-2: #1c1f26;
    --border: #262932;
    --border-2: #353944;
    --text: #ececf0;
    --muted: #8a8f9c;
    --accent: #f5f5f7;
    --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 20px 60px -30px rgba(0,0,0,.7);
    --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body { overflow-x: hidden; }

a { color: inherit; text-decoration: none; transition: color .2s var(--ease), opacity .2s var(--ease); }
a:hover { color: var(--accent); }

::selection { background: #2c2f38; color: #fff; }

.mono { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: .92em; }

/* фоновая сетка с лёгким параллаксом */
.bg-grid {
    position: fixed; inset: 0; pointer-events: none; z-index: -1;
    background:
        radial-gradient(1200px 600px at 70% -10%, rgba(255,255,255,.04), transparent 60%),
        radial-gradient(800px 500px at -10% 110%, rgba(255,255,255,.03), transparent 60%),
        linear-gradient(180deg, #0a0a0c, #0b0b0d 40%, #0a0a0c);
}
.bg-grid::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 75%);
}

/* nav */
.nav {
    position: sticky; top: 0; z-index: 10;
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 32px;
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(10px);
    background: rgba(11,11,13,.6);
    transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled { border-color: var(--border); }

.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 600; letter-spacing: .3px; }
.brand-mark {
    width: 14px; height: 14px;
    background: linear-gradient(135deg, #fff 0%, #6e7280 50%, #1f2128 100%);
    border-radius: 3px;
    box-shadow: 0 0 0 1px rgba(255,255,255,.06), 0 6px 16px -8px rgba(255,255,255,.25);
}
.brand-text { font-size: 15px; }

.nav nav { display: flex; gap: 22px; align-items: center; }
.nav nav a { color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--text); }
.nav-cta {
    padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
    color: var(--text) !important;
    transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.nav-cta:hover { border-color: var(--border-2); background: var(--surface); }

/* main + sections */
main { max-width: 1080px; margin: 0 auto; padding: 0 32px 80px; }

.section { padding: 96px 0; border-top: 1px solid var(--border); }
.section:first-of-type { border-top: 0; }

.section h2 {
    font-size: clamp(22px, 2.4vw, 30px);
    font-weight: 600; letter-spacing: -.01em;
    margin: 0 0 28px;
}

.kicker {
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 12px; letter-spacing: .15em; text-transform: uppercase;
    margin: 0 0 24px;
}

/* hero */
.hero { padding: 120px 0 96px; }
.hero h1 {
    font-size: clamp(36px, 6vw, 72px);
    line-height: 1.05;
    letter-spacing: -.02em;
    font-weight: 700;
    margin: 0 0 24px;
    background: linear-gradient(180deg, #fff 0%, #b8bcc6 75%, #6e7280 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.lead { color: var(--muted); max-width: 640px; font-size: 17px; margin: 0 0 32px; }

.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 12px 22px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: linear-gradient(180deg, #1d1f26, #15171c);
    color: var(--text) !important;
    font-weight: 500;
    transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.btn:hover {
    transform: translateY(-1px);
    border-color: var(--border-2);
    box-shadow: 0 12px 30px -16px rgba(255,255,255,.18);
}

.prose { color: #c9ccd4; max-width: 720px; }

/* cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.card {
    padding: 22px;
    background: linear-gradient(180deg, var(--surface), var(--bg-2));
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
    transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: var(--border-2); }
.card h3 { margin: 0 0 8px; font-size: 16px; font-weight: 600; letter-spacing: -.005em; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

/* contact */
.contact-grid {
    display: grid; gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: linear-gradient(180deg, var(--surface), var(--bg-2));
}
.contact-grid .label {
    display: block;
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 11px; letter-spacing: .15em; text-transform: uppercase;
    margin-bottom: 6px;
}

/* footer */
footer {
    padding: 36px 32px 56px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
}

/* reveal-on-scroll */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .card, .btn { transition: none; }
}

@media (max-width: 640px) {
    .nav { padding: 14px 18px; }
    .nav nav { gap: 14px; }
    .nav nav a:not(.nav-cta) { display: none; }
    main { padding: 0 18px 60px; }
    .section { padding: 72px 0; }
    .hero { padding: 80px 0 64px; }
}