:root {
    --bg: #0b0d0c;
    --bg-alt: #101512;
    --panel: #141a16;
    --border: #23302a;
    --fg: #d7e0da;
    --muted: #8ea298;
    --accent: #39ff88;      /* неоново-зелёный */
    --accent-dim: #1f7a4a;
    --bad: #ff5c5c;
    --warn: #ffb020;
    --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --wrap: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

code {
    font-family: var(--mono);
    color: var(--accent);
    background: rgba(57, 255, 136, 0.08);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.9em;
}

h1, h2, h3, .logo, .ip, .plan-price { font-family: var(--mono); }

.accent { color: var(--accent); }

/* ─── Кнопки ─────────────────────────────────────── */
.btn {
    display: inline-block;
    background: var(--accent);
    color: #04120a;
    font-family: var(--mono);
    font-weight: 700;
    text-decoration: none;
    padding: 12px 22px;
    border-radius: 6px;
    border: 1px solid var(--accent);
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s;
    cursor: pointer;
}
.btn:hover { box-shadow: 0 0 24px rgba(57, 255, 136, 0.35); transform: translateY(-1px); }
.btn-lg { padding: 15px 28px; font-size: 16px; }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-block { display: block; text-align: center; }
.btn-ghost {
    background: transparent;
    color: var(--accent);
    border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); box-shadow: none; }

/* ─── Шапка ──────────────────────────────────────── */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 13, 12, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 20px; height: 60px; }
.logo { color: var(--fg); text-decoration: none; font-weight: 700; font-size: 15px; }
.logo .prompt { color: var(--accent); }
.nav-links { display: flex; gap: 20px; margin-left: auto; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-links a:hover { color: var(--accent); }

/* ─── Hero ───────────────────────────────────────── */
.hero {
    padding: 72px 0 56px;
    background:
        radial-gradient(900px 400px at 80% -10%, rgba(57, 255, 136, 0.10), transparent 60%),
        var(--bg);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 40px; line-height: 1.15; margin: 0 0 18px; }
.lead { font-size: 19px; color: var(--fg); margin: 0 0 14px; }
.sub { color: var(--muted); margin: 0 0 26px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Макет интерфейса лаборатории */
.hero-visual { position: relative; }
.lab-mock {
    display: grid;
    gap: 10px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.term { background: #000; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.term[data-role="attacker"] { border-color: rgba(255, 92, 92, 0.4); }
.term[data-role="server"]   { border-color: rgba(57, 255, 136, 0.35); }
.term-head {
    display: flex; justify-content: space-between; align-items: center;
    font-family: var(--mono); font-size: 11px;
    padding: 4px 8px; background: #0d120f; color: var(--muted);
    border-bottom: 1px solid var(--border);
}
.term-head .ip { color: #6f8; }
.strip { display: flex; justify-content: flex-end; gap: 2px; height: 16px; padding: 2px 4px; background: #0a0a0a; overflow: hidden; }
.strip i {
    width: 11px; height: 11px; border-radius: 2px; display: inline-block; flex: 0 0 auto;
    animation: pin 0.25s ease-out;
}
.strip i.dns  { background: var(--warn); }
.strip i.http { background: var(--accent); }
.strip i.arp  { background: #888; }
@keyframes pin { from { transform: scale(0.3); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.term-body {
    margin: 0; padding: 8px 10px;
    font-family: var(--mono); font-size: 11.5px; line-height: 1.5;
    color: #cfe; white-space: pre-wrap; word-break: break-word;
}
.c-dim { color: #5c6; opacity: 0.7; }
.c-bad { color: var(--bad); font-weight: 700; }
.c-warn { color: var(--warn); }
.cursor { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.mock-note {
    text-align: center; font-family: var(--mono); font-size: 11px;
    color: var(--muted); margin-top: 8px;
}

/* ─── Секции ─────────────────────────────────────── */
.section { padding: 64px 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 28px; margin: 0 0 12px; }
.section-lead { color: var(--muted); max-width: 760px; margin: 0 0 36px; font-size: 17px; }

/* ─── Топология ──────────────────────────────────── */
.topology { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.topo-title { font-family: var(--mono); color: var(--accent); text-align: center; margin-bottom: 8px; font-size: 14px; }
.topology svg { width: 100%; height: auto; }
.topology .bus { stroke: var(--accent-dim); stroke-width: 3; }
.topology .drop { stroke: var(--border); stroke-width: 2; }
.topology .node rect { fill: #0e140f; stroke: var(--border); stroke-width: 1.5; }
.topology .node.client rect   { stroke: #6cf; }
.topology .node.attacker rect { stroke: var(--bad); }
.topology .node.server rect   { stroke: var(--accent); }
.topology text { font-family: var(--mono); text-anchor: middle; }
.topology .role { fill: var(--fg); font-size: 13px; }
.topology .nm { fill: var(--muted); font-size: 11px; }
.topology .ip { fill: #7fd; font-size: 12px; }
.topology .tag { font-size: 11px; }
.topology .tag.good { fill: var(--accent); }
.topology .tag.bad { fill: var(--bad); }
.topology .bus-label { fill: var(--muted); font-size: 11px; }

/* ─── Таймлайн ───────────────────────────────────── */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.timeline li { display: flex; gap: 16px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; }
.tl-num {
    flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
    background: rgba(57, 255, 136, 0.12); color: var(--accent);
    font-family: var(--mono); font-weight: 700;
    display: grid; place-items: center; border: 1px solid var(--accent-dim);
}
.tl-body h3 { margin: 2px 0 4px; font-size: 16px; color: var(--fg); }
.tl-body p { margin: 0; color: var(--muted); }

/* ─── Карточки стека ─────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 40px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 18px; }
.card-ic { font-size: 22px; margin-bottom: 8px; }
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.arch { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.arch-box { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 14px 18px; font-family: var(--mono); text-align: center; }
.arch-box small { color: var(--muted); }
.arch-arrow { color: var(--accent); font-size: 22px; }
.arch-stack { display: grid; gap: 6px; }
.arch-stack span { background: #0e140f; border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 4px; padding: 6px 12px; font-family: var(--mono); font-size: 13px; }
.arch-note { text-align: center; color: var(--muted); margin-top: 18px; }

/* ─── Фичи ───────────────────────────────────────── */
.features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.feat { display: flex; gap: 14px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 18px; }
.feat-ic { font-size: 24px; flex: 0 0 auto; }
.feat h3 { margin: 0 0 4px; font-size: 16px; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; }

/* ─── Тариф ──────────────────────────────────────── */
.pricing-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px; align-items: start; }
.plan { background: var(--panel); border: 1px solid var(--accent-dim); border-radius: 12px; padding: 26px; box-shadow: 0 0 40px rgba(57, 255, 136, 0.08); }
.plan-name { font-size: 15px; color: var(--muted); }
.plan-price { font-size: 34px; color: var(--accent); margin: 8px 0 18px; }
.plan-price span { font-size: 15px; color: var(--muted); }
.plan-list { list-style: none; padding: 0; margin: 0 0 22px; }
.plan-list li { padding: 7px 0 7px 26px; position: relative; color: var(--fg); }
.plan-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

.trust { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 26px; }
.trust-flow { display: flex; align-items: center; gap: 12px; justify-content: center; margin-bottom: 16px; flex-wrap: wrap; }
.trust-box { background: #0e140f; border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; text-align: center; font-family: var(--mono); font-size: 13px; }
.trust-box.strong { border-color: var(--accent); color: var(--accent); }
.trust-box small { color: var(--muted); }
.trust-arrow { color: var(--accent); font-family: var(--mono); }
.trust p { color: var(--muted); margin: 0; font-size: 14px; text-align: center; }

/* ─── FAQ ────────────────────────────────────────── */
.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 4px 16px; }
.faq summary { cursor: pointer; padding: 12px 0; font-family: var(--mono); font-size: 15px; color: var(--fg); }
.faq summary::marker { color: var(--accent); }
.faq details[open] summary { color: var(--accent); }
.faq details p { margin: 0 0 14px; color: var(--muted); }

/* ─── Финальный CTA ──────────────────────────────── */
.cta-final { text-align: center; background: radial-gradient(700px 300px at 50% 0%, rgba(57, 255, 136, 0.12), transparent 65%); }
.cta-final h2 { margin-bottom: 22px; }

/* ─── Футер ──────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); padding: 32px 0; background: var(--bg-alt); }
.footer-inner { display: grid; gap: 12px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 13px; }
.footer-links a:hover { color: var(--accent); }
.disclaimer { color: #5f6f66; font-size: 12px; margin: 0; max-width: 760px; }

/* ─── Адаптив ────────────────────────────────────── */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero h1 { font-size: 32px; }
    .cards { grid-template-columns: 1fr 1fr; }
    .features { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}
@media (max-width: 560px) {
    .cards { grid-template-columns: 1fr; }
    .hero h1 { font-size: 27px; }
    .section h2 { font-size: 23px; }
    .arch { flex-direction: column; }
    .arch-arrow { transform: rotate(90deg); }
}